---
_id: '43367'
author:
- first_name: V.
full_name: Janzen, V.
last_name: Janzen
- first_name: G.
full_name: Meschut, G.
last_name: Meschut
- first_name: M.
full_name: Dahmen, M.
last_name: Dahmen
- first_name: R.
full_name: Poprawe, R.
last_name: Poprawe
- first_name: S.
full_name: Lindner, S.
last_name: Lindner
- first_name: R.
full_name: Wagener, R.
last_name: Wagener
- first_name: T.
full_name: Melz, T.
last_name: Melz
citation:
ama: Janzen V, Meschut G, Dahmen M, et al. Investigation on joint characteristics
of laser beam welded press hardenable ultra-high strength steels with ferritic-martensitic
and martensitic microstructure. Welding in the World. 2015;59(4):545-554.
doi:10.1007/s40194-015-0229-0
apa: Janzen, V., Meschut, G., Dahmen, M., Poprawe, R., Lindner, S., Wagener, R.,
& Melz, T. (2015). Investigation on joint characteristics of laser beam welded
press hardenable ultra-high strength steels with ferritic-martensitic and martensitic
microstructure. Welding in the World, 59(4), 545–554. https://doi.org/10.1007/s40194-015-0229-0
bibtex: '@article{Janzen_Meschut_Dahmen_Poprawe_Lindner_Wagener_Melz_2015, title={Investigation
on joint characteristics of laser beam welded press hardenable ultra-high strength
steels with ferritic-martensitic and martensitic microstructure}, volume={59},
DOI={10.1007/s40194-015-0229-0},
number={4}, journal={Welding in the World}, publisher={Springer Science and Business
Media LLC}, author={Janzen, V. and Meschut, G. and Dahmen, M. and Poprawe, R.
and Lindner, S. and Wagener, R. and Melz, T.}, year={2015}, pages={545–554} }'
chicago: 'Janzen, V., G. Meschut, M. Dahmen, R. Poprawe, S. Lindner, R. Wagener,
and T. Melz. “Investigation on Joint Characteristics of Laser Beam Welded Press
Hardenable Ultra-High Strength Steels with Ferritic-Martensitic and Martensitic
Microstructure.” Welding in the World 59, no. 4 (2015): 545–54. https://doi.org/10.1007/s40194-015-0229-0.'
ieee: 'V. Janzen et al., “Investigation on joint characteristics of laser
beam welded press hardenable ultra-high strength steels with ferritic-martensitic
and martensitic microstructure,” Welding in the World, vol. 59, no. 4,
pp. 545–554, 2015, doi: 10.1007/s40194-015-0229-0.'
mla: Janzen, V., et al. “Investigation on Joint Characteristics of Laser Beam Welded
Press Hardenable Ultra-High Strength Steels with Ferritic-Martensitic and Martensitic
Microstructure.” Welding in the World, vol. 59, no. 4, Springer Science
and Business Media LLC, 2015, pp. 545–54, doi:10.1007/s40194-015-0229-0.
short: V. Janzen, G. Meschut, M. Dahmen, R. Poprawe, S. Lindner, R. Wagener, T.
Melz, Welding in the World 59 (2015) 545–554.
date_created: 2023-04-03T08:28:24Z
date_updated: 2023-04-03T08:28:47Z
department:
- _id: '157'
doi: 10.1007/s40194-015-0229-0
intvolume: ' 59'
issue: '4'
keyword:
- Metals and Alloys
- Mechanical Engineering
- Mechanics of Materials
language:
- iso: eng
page: 545-554
publication: Welding in the World
publication_identifier:
issn:
- 0043-2288
- 1878-6669
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Investigation on joint characteristics of laser beam welded press hardenable
ultra-high strength steels with ferritic-martensitic and martensitic microstructure
type: journal_article
user_id: '53912'
volume: 59
year: '2015'
...
---
_id: '43369'
abstract:
- lang: eng
text: Global competition as well as social and scientific megatrends strongly influence
the modern car manufacturing industry. One of the most important approaches is
the implementation of lightweight constructions. Therefore, the usage of high
performance materials with tailored properties gains importance. For safety-relevant
components such as automotive passenger cells it is necessary to minimize deformation
to reduce the risk of injury for the vehicle occupants during a car accident.
Thus, hot stamped high-strength steels have been established. High-strength and
low formability of this kind of materials represent new challenges for joining
technologies. One possibility to join high-strength steels is the newly developed
shear-clinching technology. Due to the use of a combined cutting and joining process,
the connection of dissimilar materials with high difference in strength and formability
can be achieved. Further research to ensure process reliability and to improve
the strength of the joint is required. One possible approach for this is the numerical
investigation of the material flow during the joining process. Therefore, the
definition of process parameters for the finite element model is necessary. A
big impact on the quality of the results has the accuracy of the used friction
values. As established testing methods are not suitable for modeling the rather
complex tribological system between the joining partners of the shear-clinching
process, an innovative testing method is needed. Studies in the field of sheet-bulk
metal forming already demonstrated the applicability of the ring compression test
for sheet metals. This paper presents a concept for the adaption of the ring compression
test to the specific needs of the investigated shear-clinching process. The numerical
identification of the friction coefficients is validated by experimental data
and first results are qualified by experimental and simulative shear-clinching
joints.
author:
- first_name: Martin
full_name: Müller, Martin
last_name: Müller
- first_name: Ulrich
full_name: Vierzigmann, Ulrich
last_name: Vierzigmann
- first_name: Réjane
full_name: Hörhold, Réjane
last_name: Hörhold
- first_name: Gerson
full_name: Meschut, Gerson
last_name: Meschut
- first_name: Marion
full_name: Merklein, Marion
last_name: Merklein
citation:
ama: Müller M, Vierzigmann U, Hörhold R, Meschut G, Merklein M. Development of a
Testing Method for the Identification of Friction Coefficients for Numerical Modeling
of the Shear-Clinching Process. Key Engineering Materials. 2015;639:469-476.
doi:10.4028/www.scientific.net/kem.639.469
apa: Müller, M., Vierzigmann, U., Hörhold, R., Meschut, G., & Merklein, M. (2015).
Development of a Testing Method for the Identification of Friction Coefficients
for Numerical Modeling of the Shear-Clinching Process. Key Engineering Materials,
639, 469–476. https://doi.org/10.4028/www.scientific.net/kem.639.469
bibtex: '@article{Müller_Vierzigmann_Hörhold_Meschut_Merklein_2015, title={Development
of a Testing Method for the Identification of Friction Coefficients for Numerical
Modeling of the Shear-Clinching Process}, volume={639}, DOI={10.4028/www.scientific.net/kem.639.469},
journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.},
author={Müller, Martin and Vierzigmann, Ulrich and Hörhold, Réjane and Meschut,
Gerson and Merklein, Marion}, year={2015}, pages={469–476} }'
chicago: 'Müller, Martin, Ulrich Vierzigmann, Réjane Hörhold, Gerson Meschut, and
Marion Merklein. “Development of a Testing Method for the Identification of Friction
Coefficients for Numerical Modeling of the Shear-Clinching Process.” Key Engineering
Materials 639 (2015): 469–76. https://doi.org/10.4028/www.scientific.net/kem.639.469.'
ieee: 'M. Müller, U. Vierzigmann, R. Hörhold, G. Meschut, and M. Merklein, “Development
of a Testing Method for the Identification of Friction Coefficients for Numerical
Modeling of the Shear-Clinching Process,” Key Engineering Materials, vol.
639, pp. 469–476, 2015, doi: 10.4028/www.scientific.net/kem.639.469.'
mla: Müller, Martin, et al. “Development of a Testing Method for the Identification
of Friction Coefficients for Numerical Modeling of the Shear-Clinching Process.”
Key Engineering Materials, vol. 639, Trans Tech Publications, Ltd., 2015,
pp. 469–76, doi:10.4028/www.scientific.net/kem.639.469.
short: M. Müller, U. Vierzigmann, R. Hörhold, G. Meschut, M. Merklein, Key Engineering
Materials 639 (2015) 469–476.
date_created: 2023-04-03T08:34:03Z
date_updated: 2023-04-03T08:34:30Z
department:
- _id: '157'
doi: 10.4028/www.scientific.net/kem.639.469
intvolume: ' 639'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
page: 469-476
publication: Key Engineering Materials
publication_identifier:
issn:
- 1662-9795
publication_status: published
publisher: Trans Tech Publications, Ltd.
status: public
title: Development of a Testing Method for the Identification of Friction Coefficients
for Numerical Modeling of the Shear-Clinching Process
type: journal_article
user_id: '53912'
volume: 639
year: '2015'
...
---
_id: '41534'
author:
- first_name: Thomas
full_name: Niendorf, Thomas
last_name: Niendorf
- first_name: Florian
full_name: Brenne, Florian
last_name: Brenne
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Dieter
full_name: Schwarze, Dieter
last_name: Schwarze
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Richard
full_name: Grothe, Richard
last_name: Grothe
- first_name: Markus
full_name: Wiesener, Markus
last_name: Wiesener
- first_name: Guido
full_name: Grundmeier, Guido
id: '194'
last_name: Grundmeier
- first_name: Hans Jürgen
full_name: Maier, Hans Jürgen
last_name: Maier
citation:
ama: 'Niendorf T, Brenne F, Hoyer K-P, et al. Processing of New Materials by Additive
Manufacturing: Iron-Based Alloys Containing Silver for Biomedical Applications.
Metallurgical and Materials Transactions A. 2015;46(7):2829-2833. doi:10.1007/s11661-015-2932-2'
apa: 'Niendorf, T., Brenne, F., Hoyer, K.-P., Schwarze, D., Schaper, M., Grothe,
R., Wiesener, M., Grundmeier, G., & Maier, H. J. (2015). Processing of New
Materials by Additive Manufacturing: Iron-Based Alloys Containing Silver for Biomedical
Applications. Metallurgical and Materials Transactions A, 46(7),
2829–2833. https://doi.org/10.1007/s11661-015-2932-2'
bibtex: '@article{Niendorf_Brenne_Hoyer_Schwarze_Schaper_Grothe_Wiesener_Grundmeier_Maier_2015,
title={Processing of New Materials by Additive Manufacturing: Iron-Based Alloys
Containing Silver for Biomedical Applications}, volume={46}, DOI={10.1007/s11661-015-2932-2},
number={7}, journal={Metallurgical and Materials Transactions A}, publisher={Springer
Science and Business Media LLC}, author={Niendorf, Thomas and Brenne, Florian
and Hoyer, Kay-Peter and Schwarze, Dieter and Schaper, Mirko and Grothe, Richard
and Wiesener, Markus and Grundmeier, Guido and Maier, Hans Jürgen}, year={2015},
pages={2829–2833} }'
chicago: 'Niendorf, Thomas, Florian Brenne, Kay-Peter Hoyer, Dieter Schwarze, Mirko
Schaper, Richard Grothe, Markus Wiesener, Guido Grundmeier, and Hans Jürgen Maier.
“Processing of New Materials by Additive Manufacturing: Iron-Based Alloys Containing
Silver for Biomedical Applications.” Metallurgical and Materials Transactions
A 46, no. 7 (2015): 2829–33. https://doi.org/10.1007/s11661-015-2932-2.'
ieee: 'T. Niendorf et al., “Processing of New Materials by Additive Manufacturing:
Iron-Based Alloys Containing Silver for Biomedical Applications,” Metallurgical
and Materials Transactions A, vol. 46, no. 7, pp. 2829–2833, 2015, doi: 10.1007/s11661-015-2932-2.'
mla: 'Niendorf, Thomas, et al. “Processing of New Materials by Additive Manufacturing:
Iron-Based Alloys Containing Silver for Biomedical Applications.” Metallurgical
and Materials Transactions A, vol. 46, no. 7, Springer Science and Business
Media LLC, 2015, pp. 2829–33, doi:10.1007/s11661-015-2932-2.'
short: T. Niendorf, F. Brenne, K.-P. Hoyer, D. Schwarze, M. Schaper, R. Grothe,
M. Wiesener, G. Grundmeier, H.J. Maier, Metallurgical and Materials Transactions
A 46 (2015) 2829–2833.
date_created: 2023-02-02T14:50:58Z
date_updated: 2023-06-01T14:17:55Z
department:
- _id: '9'
- _id: '158'
doi: 10.1007/s11661-015-2932-2
intvolume: ' 46'
issue: '7'
keyword:
- Metals and Alloys
- Mechanics of Materials
- Condensed Matter Physics
language:
- iso: eng
page: 2829-2833
publication: Metallurgical and Materials Transactions A
publication_identifier:
issn:
- 1073-5623
- 1543-1940
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: 'Processing of New Materials by Additive Manufacturing: Iron-Based Alloys Containing
Silver for Biomedical Applications'
type: journal_article
user_id: '43720'
volume: 46
year: '2015'
...
---
_id: '4035'
abstract:
- lang: eng
text: We examine whether the mandated introduction of International Financial Reporting
Standards (IFRS) is associated with the propensity to access the public rather
than private debt market and the cost of debt. We use a global sample of public
bonds and private loans and find that mandatory IFRS adopters are more likely,
post-IFRS, to issue bonds than to borrow privately. We also find that mandatory
IFRS adopters pay lower bond yield spreads, but not lower loan spreads, after
the mandate. These findings are consistent with debt providers responding positively
to financial reporting of higher quality and comparability, but only when there
is a greater reliance on publicly available financial statements than private
communication. Lastly, we document that the observed debt market benefits are
concentrated in countries with larger differences between domestic GAAP and IFRS
and are present even for EU countries that did not experience concurrent financial
reporting enforcement or other institutional reforms. Overall, our study documents
positive economic consequences around the mandated IFRS adoption for corporate
debt financing and, in particular, for bond financing.
author:
- first_name: Annita
full_name: Florou, Annita
last_name: Florou
- first_name: Urska
full_name: Kosi, Urska
id: '54068'
last_name: Kosi
orcid: 0009-0009-2545-5929
citation:
ama: Florou A, Kosi U. Does mandatory IFRS adoption facilitate debt financing? Review
of Accounting Studies. 2015;20(4):1407-1456. doi:10.1007/s11142-015-9325-z
apa: Florou, A., & Kosi, U. (2015). Does mandatory IFRS adoption facilitate
debt financing? Review of Accounting Studies, 20(4), 1407–1456.
https://doi.org/10.1007/s11142-015-9325-z
bibtex: '@article{Florou_Kosi_2015, title={Does mandatory IFRS adoption facilitate
debt financing?}, volume={20}, DOI={10.1007/s11142-015-9325-z},
number={4}, journal={Review of Accounting Studies}, author={Florou, Annita and
Kosi, Urska}, year={2015}, pages={1407–1456} }'
chicago: 'Florou, Annita, and Urska Kosi. “Does Mandatory IFRS Adoption Facilitate
Debt Financing?” Review of Accounting Studies 20, no. 4 (2015): 1407–56.
https://doi.org/10.1007/s11142-015-9325-z.'
ieee: 'A. Florou and U. Kosi, “Does mandatory IFRS adoption facilitate debt financing?,”
Review of Accounting Studies, vol. 20, no. 4, pp. 1407–1456, 2015, doi:
10.1007/s11142-015-9325-z.'
mla: Florou, Annita, and Urska Kosi. “Does Mandatory IFRS Adoption Facilitate Debt
Financing?” Review of Accounting Studies, vol. 20, no. 4, 2015, pp. 1407–56,
doi:10.1007/s11142-015-9325-z.
short: A. Florou, U. Kosi, Review of Accounting Studies 20 (2015) 1407–1456.
date_created: 2018-08-22T07:47:41Z
date_updated: 2026-06-15T09:39:29Z
department:
- _id: '551'
- _id: '635'
- _id: '186'
doi: 10.1007/s11142-015-9325-z
extern: '1'
intvolume: ' 20'
issue: '4'
jel:
- G15
- K22
- M41
- M48
keyword:
- Accounting regulation
- IFRS
- Accounting quality
- Public and private debt markets
- Cost of debt
language:
- iso: eng
page: 1407-1456
publication: Review of Accounting Studies
publication_identifier:
eissn:
- 1573-7136
publication_status: published
status: public
title: Does mandatory IFRS adoption facilitate debt financing?
type: journal_article
user_id: '54068'
volume: 20
year: '2015'
...
---
_id: '3699'
abstract:
- lang: eng
text: When taxes on capital or wealth are levied, in most countries companies have
to be assessed in terms of their market value (MV). Estimating the MV of private
companies for tax purposes is a challenging task for tax authorities as MVs are
not available. In this study, I empirically analyse to what extent an accounting-based
tax valuation method for private companies, a simplified residual income model,
succeeds in matching the MV. I refer to the mandatory Standardised Combination
Model that is a special case of methods commonly used in several countries. In
the absence of market prices for private companies, I use a sample of small German
public companies as a proxy. I validate this approach using a sensitivity analysis
that involves matching the sample of public companies with that of private companies.
The results imply that the mandatory Standardised Combination Model leads to a
severe unequal treatment not only between public and private companies but also
among private companies across and within industries. Furthermore, I simulate
the effects of variation in the key parameters and highlight their impact on the
approximation quality of the Standardised Combination Method. The findings are
relevant to tax reform discussions as well as to tax policy-makers and practitioners
in many countries.
article_type: original
author:
- first_name: Jens
full_name: Müller, Jens
id: '1245'
last_name: Müller
citation:
ama: Müller J. The challenge of assessing the market value of private companies
using a standardised combination method for tax purposes--Lessons to be learnt
from past experience. European Accounting Review. 2014;(1):117--141.
apa: Müller, J. (2014). The challenge of assessing the market value of private companies
using a standardised combination method for tax purposes--Lessons to be learnt
from past experience. European Accounting Review, (1), 117--141.
bibtex: '@article{Müller_2014, title={The challenge of assessing the market value
of private companies using a standardised combination method for tax purposes--Lessons
to be learnt from past experience}, number={1}, journal={European Accounting Review},
author={Müller, Jens}, year={2014}, pages={117--141} }'
chicago: 'Müller, Jens. “The Challenge of Assessing the Market Value of Private
Companies Using a Standardised Combination Method for Tax Purposes--Lessons to
Be Learnt from Past Experience.” European Accounting Review, no. 1 (2014):
117--141.'
ieee: J. Müller, “The challenge of assessing the market value of private companies
using a standardised combination method for tax purposes--Lessons to be learnt
from past experience,” European Accounting Review, no. 1, pp. 117--141,
2014.
mla: Müller, Jens. “The Challenge of Assessing the Market Value of Private Companies
Using a Standardised Combination Method for Tax Purposes--Lessons to Be Learnt
from Past Experience.” European Accounting Review, no. 1, 2014, pp. 117--141.
short: J. Müller, European Accounting Review (2014) 117--141.
date_created: 2018-07-25T07:53:11Z
date_updated: 2022-01-06T06:59:30Z
department:
- _id: '189'
issue: '1'
jel:
- H2
- M41
keyword:
- Challenge of Assessing
- Tax Purposes
language:
- iso: eng
page: 117--141
publication: European Accounting Review
status: public
title: The challenge of assessing the market value of private companies using a standardised
combination method for tax purposes--Lessons to be learnt from past experience
type: journal_article
user_id: '48187'
year: '2014'
...
---
_id: '4697'
author:
- first_name: Peter
full_name: Sommerauer, Peter
last_name: Sommerauer
- first_name: Oliver
full_name: Müller, Oliver
last_name: Müller
citation:
ama: 'Sommerauer P, Müller O. Augmented reality in informal learning environments:
A field experiment in a mathematics exhibition. Computers and Education.
2014:59--68. doi:10.1016/j.compedu.2014.07.013'
apa: 'Sommerauer, P., & Müller, O. (2014). Augmented reality in informal learning
environments: A field experiment in a mathematics exhibition. Computers and
Education, 59--68. https://doi.org/10.1016/j.compedu.2014.07.013'
bibtex: '@article{Sommerauer_Müller_2014, title={Augmented reality in informal learning
environments: A field experiment in a mathematics exhibition}, DOI={10.1016/j.compedu.2014.07.013},
journal={Computers and Education}, author={Sommerauer, Peter and Müller, Oliver},
year={2014}, pages={59--68} }'
chicago: 'Sommerauer, Peter, and Oliver Müller. “Augmented Reality in Informal Learning
Environments: A Field Experiment in a Mathematics Exhibition.” Computers and
Education, 2014, 59--68. https://doi.org/10.1016/j.compedu.2014.07.013.'
ieee: 'P. Sommerauer and O. Müller, “Augmented reality in informal learning environments:
A field experiment in a mathematics exhibition,” Computers and Education,
pp. 59--68, 2014.'
mla: 'Sommerauer, Peter, and Oliver Müller. “Augmented Reality in Informal Learning
Environments: A Field Experiment in a Mathematics Exhibition.” Computers and
Education, 2014, pp. 59--68, doi:10.1016/j.compedu.2014.07.013.'
short: P. Sommerauer, O. Müller, Computers and Education (2014) 59--68.
date_created: 2018-10-12T08:30:44Z
date_updated: 2022-01-06T07:01:18Z
doi: 10.1016/j.compedu.2014.07.013
extern: '1'
keyword:
- Augmented reality
- Cognitive theory of multimedia learning
- Field experiment
- Informal learning
- Museum
language:
- iso: eng
page: 59--68
publication: Computers and Education
publication_identifier:
isbn:
- 0360-1315
issn:
- '03601315'
status: public
title: 'Augmented reality in informal learning environments: A field experiment in
a mathematics exhibition'
type: journal_article
user_id: '72849'
year: '2014'
...
---
_id: '11753'
abstract:
- lang: eng
text: This contribution describes a step-wise source counting algorithm to determine
the number of speakers in an offline scenario. Each speaker is identified by a
variational expectation maximization (VEM) algorithm for complex Watson mixture
models and therefore directly yields beamforming vectors for a subsequent speech
separation process. An observation selection criterion is proposed which improves
the robustness of the source counting in noise. The algorithm is compared to an
alternative VEM approach with Gaussian mixture models based on directions of arrival
and shown to deliver improved source counting accuracy. The article concludes
by extending the offline algorithm towards a low-latency online estimation of
the number of active sources from the streaming input data.
author:
- first_name: Lukas
full_name: Drude, Lukas
id: '11213'
last_name: Drude
- first_name: Aleksej
full_name: Chinaev, Aleksej
last_name: Chinaev
- first_name: Dang Hai
full_name: Tran Vu, Dang Hai
last_name: Tran Vu
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Drude L, Chinaev A, Tran Vu DH, Haeb-Umbach R. Towards Online Source Counting
in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models.
In: 14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014).
; 2014:213-217.'
apa: Drude, L., Chinaev, A., Tran Vu, D. H., & Haeb-Umbach, R. (2014). Towards
Online Source Counting in Speech Mixtures Applying a Variational EM for Complex
Watson Mixture Models. In 14th International Workshop on Acoustic Signal Enhancement
(IWAENC 2014) (pp. 213–217).
bibtex: '@inproceedings{Drude_Chinaev_Tran Vu_Haeb-Umbach_2014, title={Towards Online
Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson
Mixture Models}, booktitle={14th International Workshop on Acoustic Signal Enhancement
(IWAENC 2014)}, author={Drude, Lukas and Chinaev, Aleksej and Tran Vu, Dang Hai
and Haeb-Umbach, Reinhold}, year={2014}, pages={213–217} }'
chicago: Drude, Lukas, Aleksej Chinaev, Dang Hai Tran Vu, and Reinhold Haeb-Umbach.
“Towards Online Source Counting in Speech Mixtures Applying a Variational EM for
Complex Watson Mixture Models.” In 14th International Workshop on Acoustic
Signal Enhancement (IWAENC 2014), 213–17, 2014.
ieee: L. Drude, A. Chinaev, D. H. Tran Vu, and R. Haeb-Umbach, “Towards Online Source
Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture
Models,” in 14th International Workshop on Acoustic Signal Enhancement (IWAENC
2014), 2014, pp. 213–217.
mla: Drude, Lukas, et al. “Towards Online Source Counting in Speech Mixtures Applying
a Variational EM for Complex Watson Mixture Models.” 14th International Workshop
on Acoustic Signal Enhancement (IWAENC 2014), 2014, pp. 213–17.
short: 'L. Drude, A. Chinaev, D.H. Tran Vu, R. Haeb-Umbach, in: 14th International
Workshop on Acoustic Signal Enhancement (IWAENC 2014), 2014, pp. 213–217.'
date_created: 2019-07-12T05:27:35Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
keyword:
- Accuracy
- Acoustics
- Estimation
- Mathematical model
- Soruce separation
- Speech
- Vectors
- Bayes methods
- Blind source separation
- Directional statistics
- Number of speakers
- Speaker diarization
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2014/DrChTrHaeb14.pdf
oa: '1'
page: 213-217
publication: 14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)
related_material:
link:
- description: Poster
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2014/DrChTrHaeb14_Poster.pdf
status: public
title: Towards Online Source Counting in Speech Mixtures Applying a Variational EM
for Complex Watson Mixture Models
type: conference
user_id: '44006'
year: '2014'
...
---
_id: '11861'
abstract:
- lang: eng
text: 'In this contribution we present a theoretical and experimental investigation
into the effects of reverberation and noise on features in the logarithmic mel
power spectral domain, an intermediate stage in the computation of the mel frequency
cepstral coefficients, prevalent in automatic speech recognition (ASR). Gaining
insight into the complex interaction between clean speech, noise, and noisy reverberant
speech features is essential for any ASR system to be robust against noise and
reverberation present in distant microphone input signals. The findings are gathered
in a probabilistic formulation of an observation model which may be used in model-based
feature compensation schemes. The proposed observation model extends previous
models in three major directions: First, the contribution of additive background
noise to the observation error is explicitly taken into account. Second, an energy
compensation constant is introduced which ensures an unbiased estimate of the
reverberant speech features, and, third, a recursive variant of the observation
model is developed resulting in reduced computational complexity when used in
model-based feature compensation. The experimental section is used to evaluate
the accuracy of the model and to describe how its parameters can be determined
from test data.'
author:
- first_name: Volker
full_name: Leutnant, Volker
last_name: Leutnant
- first_name: Alexander
full_name: Krueger, Alexander
last_name: Krueger
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Leutnant V, Krueger A, Haeb-Umbach R. A New Observation Model in the Logarithmic
Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech.
IEEE/ACM Transactions on Audio, Speech, and Language Processing. 2014;22(1):95-109.
doi:10.1109/TASLP.2013.2285480
apa: Leutnant, V., Krueger, A., & Haeb-Umbach, R. (2014). A New Observation
Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition
of Noisy Reverberant Speech. IEEE/ACM Transactions on Audio, Speech, and Language
Processing, 22(1), 95–109. https://doi.org/10.1109/TASLP.2013.2285480
bibtex: '@article{Leutnant_Krueger_Haeb-Umbach_2014, title={A New Observation Model
in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of
Noisy Reverberant Speech}, volume={22}, DOI={10.1109/TASLP.2013.2285480},
number={1}, journal={IEEE/ACM Transactions on Audio, Speech, and Language Processing},
author={Leutnant, Volker and Krueger, Alexander and Haeb-Umbach, Reinhold}, year={2014},
pages={95–109} }'
chicago: 'Leutnant, Volker, Alexander Krueger, and Reinhold Haeb-Umbach. “A New
Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic
Recognition of Noisy Reverberant Speech.” IEEE/ACM Transactions on Audio, Speech,
and Language Processing 22, no. 1 (2014): 95–109. https://doi.org/10.1109/TASLP.2013.2285480.'
ieee: V. Leutnant, A. Krueger, and R. Haeb-Umbach, “A New Observation Model in the
Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant
Speech,” IEEE/ACM Transactions on Audio, Speech, and Language Processing,
vol. 22, no. 1, pp. 95–109, 2014.
mla: Leutnant, Volker, et al. “A New Observation Model in the Logarithmic Mel Power
Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech.” IEEE/ACM
Transactions on Audio, Speech, and Language Processing, vol. 22, no. 1, 2014,
pp. 95–109, doi:10.1109/TASLP.2013.2285480.
short: V. Leutnant, A. Krueger, R. Haeb-Umbach, IEEE/ACM Transactions on Audio,
Speech, and Language Processing 22 (2014) 95–109.
date_created: 2019-07-12T05:29:41Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/TASLP.2013.2285480
intvolume: ' 22'
issue: '1'
keyword:
- computational complexity
- reverberation
- speech recognition
- automatic speech recognition
- background noise
- clean speech
- computational complexity
- energy compensation
- logarithmic mel power spectral domain
- mel frequency cepstral coefficients
- microphone input signals
- model-based feature compensation schemes
- noisy reverberant speech automatic recognition
- noisy reverberant speech features
- reverberation
- Atmospheric modeling
- Computational modeling
- Noise
- Noise measurement
- Reverberation
- Speech
- Vectors
- Model-based feature compensation
- observation model for reverberant and noisy speech
- recursive observation model
- robust automatic speech recognition
language:
- iso: eng
page: 95-109
publication: IEEE/ACM Transactions on Audio, Speech, and Language Processing
publication_identifier:
issn:
- 2329-9290
status: public
title: A New Observation Model in the Logarithmic Mel Power Spectral Domain for the
Automatic Recognition of Noisy Reverberant Speech
type: journal_article
user_id: '44006'
volume: 22
year: '2014'
...
---
_id: '11867'
abstract:
- lang: eng
text: 'New waves of consumer-centric applications, such as voice search and voice
interaction with mobile devices and home entertainment systems, increasingly require
automatic speech recognition (ASR) to be robust to the full range of real-world
noise and other acoustic distorting conditions. Despite its practical importance,
however, the inherent links between and distinctions among the myriad of methods
for noise-robust ASR have yet to be carefully studied in order to advance the
field further. To this end, it is critical to establish a solid, consistent, and
common mathematical foundation for noise-robust ASR, which is lacking at present.
This article is intended to fill this gap and to provide a thorough overview of
modern noise-robust techniques for ASR developed over the past 30 years. We emphasize
methods that are proven to be successful and that are likely to sustain or expand
their future applicability. We distill key insights from our comprehensive overview
in this field and take a fresh look at a few old problems, which nevertheless
are still highly relevant today. Specifically, we have analyzed and categorized
a wide range of noise-robust techniques using five different criteria: 1) feature-domain
vs. model-domain processing, 2) the use of prior knowledge about the acoustic
environment distortion, 3) the use of explicit environment-distortion models,
4) deterministic vs. uncertainty processing, and 5) the use of acoustic models
trained jointly with the same feature enhancement or model adaptation process
used in the testing stage. With this taxonomy-oriented review, we equip the reader
with the insight to choose among techniques and with the awareness of the performance-complexity
tradeoffs. The pros and cons of using different noise-robust ASR techniques in
practical application scenarios are provided as a guide to interested practitioners.
The current challenges and future research directions in this field is also carefully
analyzed.'
author:
- first_name: Jinyu
full_name: Li, Jinyu
last_name: Li
- first_name: Li
full_name: Deng, Li
last_name: Deng
- first_name: Yifan
full_name: Gong, Yifan
last_name: Gong
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Li J, Deng L, Gong Y, Haeb-Umbach R. An Overview of Noise-Robust Automatic
Speech Recognition. IEEE Transactions on Audio, Speech and Language Processing.
2014;22(4):745-777. doi:10.1109/TASLP.2014.2304637
apa: Li, J., Deng, L., Gong, Y., & Haeb-Umbach, R. (2014). An Overview of Noise-Robust
Automatic Speech Recognition. IEEE Transactions on Audio, Speech and Language
Processing, 22(4), 745–777. https://doi.org/10.1109/TASLP.2014.2304637
bibtex: '@article{Li_Deng_Gong_Haeb-Umbach_2014, title={An Overview of Noise-Robust
Automatic Speech Recognition}, volume={22}, DOI={10.1109/TASLP.2014.2304637},
number={4}, journal={IEEE Transactions on Audio, Speech and Language Processing},
author={Li, Jinyu and Deng, Li and Gong, Yifan and Haeb-Umbach, Reinhold}, year={2014},
pages={745–777} }'
chicago: 'Li, Jinyu, Li Deng, Yifan Gong, and Reinhold Haeb-Umbach. “An Overview
of Noise-Robust Automatic Speech Recognition.” IEEE Transactions on Audio,
Speech and Language Processing 22, no. 4 (2014): 745–77. https://doi.org/10.1109/TASLP.2014.2304637.'
ieee: J. Li, L. Deng, Y. Gong, and R. Haeb-Umbach, “An Overview of Noise-Robust
Automatic Speech Recognition,” IEEE Transactions on Audio, Speech and Language
Processing, vol. 22, no. 4, pp. 745–777, 2014.
mla: Li, Jinyu, et al. “An Overview of Noise-Robust Automatic Speech Recognition.”
IEEE Transactions on Audio, Speech and Language Processing, vol. 22, no.
4, 2014, pp. 745–77, doi:10.1109/TASLP.2014.2304637.
short: J. Li, L. Deng, Y. Gong, R. Haeb-Umbach, IEEE Transactions on Audio, Speech
and Language Processing 22 (2014) 745–777.
date_created: 2019-07-12T05:29:47Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/TASLP.2014.2304637
intvolume: ' 22'
issue: '4'
keyword:
- Speech recognition
- compensation
- distortion modeling
- joint model training
- noise
- robustness
- uncertainty processing
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6732927
oa: '1'
page: 745-777
publication: IEEE Transactions on Audio, Speech and Language Processing
status: public
title: An Overview of Noise-Robust Automatic Speech Recognition
type: journal_article
user_id: '44006'
volume: 22
year: '2014'
...
---
_id: '41224'
author:
- first_name: E.
full_name: Keceli, E.
last_name: Keceli
- first_name: M.
full_name: Hemgesberg, M.
last_name: Hemgesberg
- first_name: R.
full_name: Grünker, R.
last_name: Grünker
- first_name: V.
full_name: Bon, V.
last_name: Bon
- first_name: C.
full_name: Wilhelm, C.
last_name: Wilhelm
- first_name: T.
full_name: Philippi, T.
last_name: Philippi
- first_name: Roland
full_name: Schoch, Roland
id: '48467'
last_name: Schoch
orcid: 0000-0003-2061-7289
- first_name: Y.
full_name: Sun, Y.
last_name: Sun
- first_name: Matthias
full_name: Bauer, Matthias
id: '47241'
last_name: Bauer
orcid: 0000-0002-9294-6076
- first_name: S.
full_name: Ernst, S.
last_name: Ernst
- first_name: S.
full_name: Kaskel, S.
last_name: Kaskel
- first_name: Werner R.
full_name: Thiel, Werner R.
last_name: Thiel
citation:
ama: Keceli E, Hemgesberg M, Grünker R, et al. A series of amide functionalized
isoreticular metal organic frameworks. Microporous and Mesoporous Materials.
2014;194:115-125. doi:10.1016/j.micromeso.2014.03.022
apa: Keceli, E., Hemgesberg, M., Grünker, R., Bon, V., Wilhelm, C., Philippi, T.,
Schoch, R., Sun, Y., Bauer, M., Ernst, S., Kaskel, S., & Thiel, W. R. (2014).
A series of amide functionalized isoreticular metal organic frameworks. Microporous
and Mesoporous Materials, 194, 115–125. https://doi.org/10.1016/j.micromeso.2014.03.022
bibtex: '@article{Keceli_Hemgesberg_Grünker_Bon_Wilhelm_Philippi_Schoch_Sun_Bauer_Ernst_et
al._2014, title={A series of amide functionalized isoreticular metal organic frameworks},
volume={194}, DOI={10.1016/j.micromeso.2014.03.022},
journal={Microporous and Mesoporous Materials}, publisher={Elsevier BV}, author={Keceli,
E. and Hemgesberg, M. and Grünker, R. and Bon, V. and Wilhelm, C. and Philippi,
T. and Schoch, Roland and Sun, Y. and Bauer, Matthias and Ernst, S. and et al.},
year={2014}, pages={115–125} }'
chicago: 'Keceli, E., M. Hemgesberg, R. Grünker, V. Bon, C. Wilhelm, T. Philippi,
Roland Schoch, et al. “A Series of Amide Functionalized Isoreticular Metal Organic
Frameworks.” Microporous and Mesoporous Materials 194 (2014): 115–25. https://doi.org/10.1016/j.micromeso.2014.03.022.'
ieee: 'E. Keceli et al., “A series of amide functionalized isoreticular metal
organic frameworks,” Microporous and Mesoporous Materials, vol. 194, pp.
115–125, 2014, doi: 10.1016/j.micromeso.2014.03.022.'
mla: Keceli, E., et al. “A Series of Amide Functionalized Isoreticular Metal Organic
Frameworks.” Microporous and Mesoporous Materials, vol. 194, Elsevier BV,
2014, pp. 115–25, doi:10.1016/j.micromeso.2014.03.022.
short: E. Keceli, M. Hemgesberg, R. Grünker, V. Bon, C. Wilhelm, T. Philippi, R.
Schoch, Y. Sun, M. Bauer, S. Ernst, S. Kaskel, W.R. Thiel, Microporous and Mesoporous
Materials 194 (2014) 115–125.
date_created: 2023-01-31T14:45:24Z
date_updated: 2023-01-31T14:48:17Z
department:
- _id: '306'
doi: 10.1016/j.micromeso.2014.03.022
intvolume: ' 194'
keyword:
- Mechanics of Materials
- Condensed Matter Physics
- General Materials Science
- General Chemistry
language:
- iso: eng
page: 115-125
publication: Microporous and Mesoporous Materials
publication_identifier:
issn:
- 1387-1811
publication_status: published
publisher: Elsevier BV
status: public
title: A series of amide functionalized isoreticular metal organic frameworks
type: journal_article
user_id: '48467'
volume: 194
year: '2014'
...
---
_id: '8171'
abstract:
- lang: eng
text: "The polynomial hierarchy plays a central role in classical complexity theory.
Here, we define\r\na quantum generalization of the polynomial hierarchy, and initiate
its study. We show that\r\nnot only are there natural complete problems for the
second level of this quantum hierarchy, but that these problems are in fact hard
to approximate. Using the same techniques, we\r\nalso obtain hardness of approximation
for the class QCMA. Our approach is based on the\r\nuse of dispersers, and is
inspired by the classical results of Umans regarding hardness of approximation
for the second level of the classical polynomial hierarchy [Umans, FOCS 1999].\r\nThe
problems for which we prove hardness of approximation for include, among others,
a\r\nquantum version of the Succinct Set Cover problem, and a variant of the local
Hamiltonian\r\nproblem with hybrid classical-quantum ground states."
article_type: original
author:
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Julia
full_name: Kempe, Julia
last_name: Kempe
citation:
ama: Gharibian S, Kempe J. Hardness of approximation for quantum problems. Quantum
Information & Computation. 2014;14(5-6):517-540.
apa: Gharibian, S., & Kempe, J. (2014). Hardness of approximation for quantum
problems. Quantum Information & Computation, 14(5–6), 517–540.
bibtex: '@article{Gharibian_Kempe_2014, title={Hardness of approximation for quantum
problems}, volume={14}, number={5–6}, journal={Quantum Information & Computation},
author={Gharibian, Sevag and Kempe, Julia}, year={2014}, pages={517–540} }'
chicago: 'Gharibian, Sevag, and Julia Kempe. “Hardness of Approximation for Quantum
Problems.” Quantum Information & Computation 14, no. 5–6 (2014): 517–40.'
ieee: S. Gharibian and J. Kempe, “Hardness of approximation for quantum problems,”
Quantum Information & Computation, vol. 14, no. 5–6, pp. 517–540, 2014.
mla: Gharibian, Sevag, and Julia Kempe. “Hardness of Approximation for Quantum Problems.”
Quantum Information & Computation, vol. 14, no. 5–6, 2014, pp. 517–40.
short: S. Gharibian, J. Kempe, Quantum Information & Computation 14 (2014) 517–540.
date_created: 2019-03-01T11:56:55Z
date_updated: 2023-02-28T11:02:47Z
department:
- _id: '623'
- _id: '7'
extern: '1'
external_id:
arxiv:
- '1209.1055'
intvolume: ' 14'
issue: 5-6
keyword:
- Hardness of approximation
- polynomial time hierarchy
- succinct set cover
- quantum complexity
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/1209.1055
oa: '1'
page: 517-540
publication: Quantum Information & Computation
publication_status: published
status: public
title: Hardness of approximation for quantum problems
type: journal_article
user_id: '71541'
volume: 14
year: '2014'
...
---
_id: '43425'
author:
- first_name: Gerson
full_name: Meschut, Gerson
last_name: Meschut
- first_name: Sebastian
full_name: Süllentrop, Sebastian
last_name: Süllentrop
citation:
ama: Meschut G, Süllentrop S. The use of radiation-cured adhesives on adhesive stud
assembly process. Welding in the World. 2014;58(5):755-762. doi:10.1007/s40194-014-0176-1
apa: Meschut, G., & Süllentrop, S. (2014). The use of radiation-cured adhesives
on adhesive stud assembly process. Welding in the World, 58(5),
755–762. https://doi.org/10.1007/s40194-014-0176-1
bibtex: '@article{Meschut_Süllentrop_2014, title={The use of radiation-cured adhesives
on adhesive stud assembly process}, volume={58}, DOI={10.1007/s40194-014-0176-1},
number={5}, journal={Welding in the World}, publisher={Springer Science and Business
Media LLC}, author={Meschut, Gerson and Süllentrop, Sebastian}, year={2014}, pages={755–762}
}'
chicago: 'Meschut, Gerson, and Sebastian Süllentrop. “The Use of Radiation-Cured
Adhesives on Adhesive Stud Assembly Process.” Welding in the World 58,
no. 5 (2014): 755–62. https://doi.org/10.1007/s40194-014-0176-1.'
ieee: 'G. Meschut and S. Süllentrop, “The use of radiation-cured adhesives on adhesive
stud assembly process,” Welding in the World, vol. 58, no. 5, pp. 755–762,
2014, doi: 10.1007/s40194-014-0176-1.'
mla: Meschut, Gerson, and Sebastian Süllentrop. “The Use of Radiation-Cured Adhesives
on Adhesive Stud Assembly Process.” Welding in the World, vol. 58, no.
5, Springer Science and Business Media LLC, 2014, pp. 755–62, doi:10.1007/s40194-014-0176-1.
short: G. Meschut, S. Süllentrop, Welding in the World 58 (2014) 755–762.
date_created: 2023-04-06T09:12:30Z
date_updated: 2023-04-06T09:13:02Z
department:
- _id: '157'
doi: 10.1007/s40194-014-0176-1
intvolume: ' 58'
issue: '5'
keyword:
- Metals and Alloys
- Mechanical Engineering
- Mechanics of Materials
language:
- iso: eng
page: 755-762
publication: Welding in the World
publication_identifier:
issn:
- 0043-2288
- 1878-6669
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: The use of radiation-cured adhesives on adhesive stud assembly process
type: journal_article
user_id: '53912'
volume: 58
year: '2014'
...
---
_id: '43432'
author:
- first_name: G.
full_name: Meschut, G.
last_name: Meschut
- first_name: V.
full_name: Janzen, V.
last_name: Janzen
- first_name: T.
full_name: Olfermann, T.
last_name: Olfermann
citation:
ama: Meschut G, Janzen V, Olfermann T. Innovative and Highly Productive Joining
Technologies for Multi-Material Lightweight Car Body Structures. Journal of
Materials Engineering and Performance. 2014;23(5):1515-1523. doi:10.1007/s11665-014-0962-3
apa: Meschut, G., Janzen, V., & Olfermann, T. (2014). Innovative and Highly
Productive Joining Technologies for Multi-Material Lightweight Car Body Structures.
Journal of Materials Engineering and Performance, 23(5), 1515–1523.
https://doi.org/10.1007/s11665-014-0962-3
bibtex: '@article{Meschut_Janzen_Olfermann_2014, title={Innovative and Highly Productive
Joining Technologies for Multi-Material Lightweight Car Body Structures}, volume={23},
DOI={10.1007/s11665-014-0962-3},
number={5}, journal={Journal of Materials Engineering and Performance}, publisher={Springer
Science and Business Media LLC}, author={Meschut, G. and Janzen, V. and Olfermann,
T.}, year={2014}, pages={1515–1523} }'
chicago: 'Meschut, G., V. Janzen, and T. Olfermann. “Innovative and Highly Productive
Joining Technologies for Multi-Material Lightweight Car Body Structures.” Journal
of Materials Engineering and Performance 23, no. 5 (2014): 1515–23. https://doi.org/10.1007/s11665-014-0962-3.'
ieee: 'G. Meschut, V. Janzen, and T. Olfermann, “Innovative and Highly Productive
Joining Technologies for Multi-Material Lightweight Car Body Structures,” Journal
of Materials Engineering and Performance, vol. 23, no. 5, pp. 1515–1523, 2014,
doi: 10.1007/s11665-014-0962-3.'
mla: Meschut, G., et al. “Innovative and Highly Productive Joining Technologies
for Multi-Material Lightweight Car Body Structures.” Journal of Materials Engineering
and Performance, vol. 23, no. 5, Springer Science and Business Media LLC,
2014, pp. 1515–23, doi:10.1007/s11665-014-0962-3.
short: G. Meschut, V. Janzen, T. Olfermann, Journal of Materials Engineering and
Performance 23 (2014) 1515–1523.
date_created: 2023-04-06T09:29:52Z
date_updated: 2023-04-06T09:30:12Z
department:
- _id: '157'
doi: 10.1007/s11665-014-0962-3
intvolume: ' 23'
issue: '5'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
page: 1515-1523
publication: Journal of Materials Engineering and Performance
publication_identifier:
issn:
- 1059-9495
- 1544-1024
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Innovative and Highly Productive Joining Technologies for Multi-Material Lightweight
Car Body Structures
type: journal_article
user_id: '53912'
volume: 23
year: '2014'
...
---
_id: '43153'
abstract:
- lang: eng
text: Facing a decreasing amount of resources on the one hand and an increasing
demand for comfort on the other, more and more attention is being paid to sustainability
and care for the environment. Particularly in the automotive sector, lightweight
design principles continue to prosper rapidly. As a result, adjusted materials
for different applications were developed. Due to the formation of intermetallic
phases, most multi-material mixes cannot be welded and require adapted joining
technologies. Mechanical joining technologies such as self-piercing riveting and
mechanical clinching have proven effective methods of joining lightweight materials
like aluminium and ductile steels. New high-strength steels are increasingly used
in crash-sections, where limited deformation under impact load is required. These
hot stamped steels have a very low elongation at break and therefore a low formability.
Currently there is no joining by forming technology without pre-punching available
using these grades of steels on die-side. The newly developed shear-clinching
process is one possible method of joining this kind of material without additional
elements. The fundamental idea of shear-clinching is a single-stage process in
which pre-punching of the die-side material is performed by indirect shear-cutting
and subsequent forming of the upper layer into this hole. This would immensely
enlarge the application segment of mechanical clinching even if hot stamped steels
are positioned on die-side. Fundamental studies are required to ensure process
reliability and it is necessary to break down the joining process into fragments,
like pre-punching and clinching with pre-punched sheet, and superpose them to
form the combined procedure shear-clinching. This paper presents a detailed investigation
of the sub-process clinching with pre-hole.
author:
- first_name: Marion
full_name: Merklein, Marion
last_name: Merklein
- first_name: Gerson
full_name: Meschut, Gerson
last_name: Meschut
- first_name: Martin
full_name: Müller, Martin
last_name: Müller
- first_name: Réjane
full_name: Hörhold, Réjane
last_name: Hörhold
citation:
ama: Merklein M, Meschut G, Müller M, Hörhold R. Basic Investigations of Non-Pre-Punched
Joining by Forming of Aluminium Alloy and High Strength Steel with Shear-Clinching
Technology. Key Engineering Materials. 2014;611-612:1413-1420. doi:10.4028/www.scientific.net/kem.611-612.1413
apa: Merklein, M., Meschut, G., Müller, M., & Hörhold, R. (2014). Basic Investigations
of Non-Pre-Punched Joining by Forming of Aluminium Alloy and High Strength Steel
with Shear-Clinching Technology. Key Engineering Materials, 611–612,
1413–1420. https://doi.org/10.4028/www.scientific.net/kem.611-612.1413
bibtex: '@article{Merklein_Meschut_Müller_Hörhold_2014, title={Basic Investigations
of Non-Pre-Punched Joining by Forming of Aluminium Alloy and High Strength Steel
with Shear-Clinching Technology}, volume={611–612}, DOI={10.4028/www.scientific.net/kem.611-612.1413},
journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.},
author={Merklein, Marion and Meschut, Gerson and Müller, Martin and Hörhold, Réjane},
year={2014}, pages={1413–1420} }'
chicago: 'Merklein, Marion, Gerson Meschut, Martin Müller, and Réjane Hörhold. “Basic
Investigations of Non-Pre-Punched Joining by Forming of Aluminium Alloy and High
Strength Steel with Shear-Clinching Technology.” Key Engineering Materials
611–612 (2014): 1413–20. https://doi.org/10.4028/www.scientific.net/kem.611-612.1413.'
ieee: 'M. Merklein, G. Meschut, M. Müller, and R. Hörhold, “Basic Investigations
of Non-Pre-Punched Joining by Forming of Aluminium Alloy and High Strength Steel
with Shear-Clinching Technology,” Key Engineering Materials, vol. 611–612,
pp. 1413–1420, 2014, doi: 10.4028/www.scientific.net/kem.611-612.1413.'
mla: Merklein, Marion, et al. “Basic Investigations of Non-Pre-Punched Joining by
Forming of Aluminium Alloy and High Strength Steel with Shear-Clinching Technology.”
Key Engineering Materials, vol. 611–612, Trans Tech Publications, Ltd.,
2014, pp. 1413–20, doi:10.4028/www.scientific.net/kem.611-612.1413.
short: M. Merklein, G. Meschut, M. Müller, R. Hörhold, Key Engineering Materials
611–612 (2014) 1413–1420.
date_created: 2023-03-29T08:06:09Z
date_updated: 2023-03-29T08:08:49Z
department:
- _id: '157'
doi: 10.4028/www.scientific.net/kem.611-612.1413
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
page: 1413-1420
publication: Key Engineering Materials
publication_identifier:
issn:
- 1662-9795
publication_status: published
publisher: Trans Tech Publications, Ltd.
status: public
title: Basic Investigations of Non-Pre-Punched Joining by Forming of Aluminium Alloy
and High Strength Steel with Shear-Clinching Technology
type: journal_article
user_id: '53912'
volume: 611-612
year: '2014'
...
---
_id: '4478'
abstract:
- lang: eng
text: "The purpose of the research was to develop and validate an instrument for
the assessment of attitudes towards the study environment in higher education
contexts. The questionnaire is designed to measure students' attitudes towards
two particular objects: the university (or Higher Education Institution) and the
process of studying. Five studies at two different universities were conducted
to develop and validate the Attitudes towards the Study Environment Questionnaire
(ASEQ). In total, 1640 students filled in the questionnaire. Reliability tests
and exploratory factor analysis as well as confirmatory factor analysis showed
satisfactory psychometric characteristics of the ASEQ. Each part of the questionnaire
is internally consistent and construct validity of the scales is supported by
correlations with other constructs as assumed by current theories: Positive attitudinal
constructs (normative behavior, autonomy, joy, self-efficacy, and task value)
are positively related to intrinsic motivation and the expected study performance
while anxiety is negatively related to these constructs. \r\nSince attitudes towards
the study situation are connected to student engagement and motivation, the study
contributes to the theory of student learning by providing a validated instrument
to assess attitudes. Thus, the ASEQ can support further research on student performance
and development by providing an instrument for the hitherto neglected but nonetheless
extremely relevant domain of attitudes. Also, the questionnaire can be used as
a diagnostic instrument for higher education faculty and administration to trace
students' attitudinal development over time - a factor of prime importance for
student socialization during the introductory phase of studying."
author:
- first_name: Taiga
full_name: Brahm, Taiga
last_name: Brahm
- first_name: Tobias
full_name: Jenert, Tobias
id: '71994'
last_name: Jenert
orcid: ' https://orcid.org/0000-0001-9262-5646'
- first_name: Dieter
full_name: Euler, Dieter
last_name: Euler
citation:
ama: 'Brahm T, Jenert T, Euler D. On the assessment of attitudes towards the study
process and the university: Attitudes towards the Study Environment Questionnaire
(ASEQ). In: EARLI European Association for Research on Learning and Instruction;
2013.'
apa: 'Brahm, T., Jenert, T., & Euler, D. (2013). On the assessment of attitudes
towards the study process and the university: Attitudes towards the Study Environment
Questionnaire (ASEQ). Presented at the 15th Biennial EARLI Conference, München
: EARLI European Association for Research on Learning and Instruction.'
bibtex: '@inproceedings{Brahm_Jenert_Euler_2013, title={On the assessment of attitudes
towards the study process and the university: Attitudes towards the Study Environment
Questionnaire (ASEQ)}, publisher={EARLI European Association for Research on Learning
and Instruction}, author={Brahm, Taiga and Jenert, Tobias and Euler, Dieter},
year={2013} }'
chicago: 'Brahm, Taiga, Tobias Jenert, and Dieter Euler. “On the Assessment of Attitudes
towards the Study Process and the University: Attitudes towards the Study Environment
Questionnaire (ASEQ).” EARLI European Association for Research on Learning and
Instruction, 2013.'
ieee: 'T. Brahm, T. Jenert, and D. Euler, “On the assessment of attitudes towards
the study process and the university: Attitudes towards the Study Environment
Questionnaire (ASEQ),” presented at the 15th Biennial EARLI Conference, München
, 2013.'
mla: 'Brahm, Taiga, et al. On the Assessment of Attitudes towards the Study Process
and the University: Attitudes towards the Study Environment Questionnaire (ASEQ).
EARLI European Association for Research on Learning and Instruction, 2013.'
short: 'T. Brahm, T. Jenert, D. Euler, in: EARLI European Association for Research
on Learning and Instruction, 2013.'
conference:
end_date: 2013-08-31
location: 'München '
name: 15th Biennial EARLI Conference
start_date: 2013-08-27
date_created: 2018-09-19T08:22:51Z
date_updated: 2022-01-06T07:01:06Z
department:
- _id: '208'
- _id: '282'
extern: '1'
keyword:
- attitudes
- teaching and learning
- studying
- higher education institution
- theory of planned behavior
- instrument development
publisher: EARLI European Association for Research on Learning and Instruction
status: public
title: 'On the assessment of attitudes towards the study process and the university:
Attitudes towards the Study Environment Questionnaire (ASEQ)'
type: conference
user_id: '51057'
year: '2013'
...
---
_id: '4481'
abstract:
- lang: ger
text: 'Die vorliegende Untersuchung an der Universität St. Gallen soll Erkenntnisse
über die Verläufe der Einstellungsveränderungen der Studierenden geben (vgl. Brahm
& Jenert, 2012). Basierend auf der Theorie des geplanten Verhaltens (Ajzen & Fishbein,
1980) werden drei Forschungsfragen adressiert: (1) Gibt es typische Pfade der
Einstellungsentwicklung? (2) Wie wird das normative Verhalten von Mitstudierenden
und anderen Personen wahrgenommen? (3) Welche Erfahrungen beeinflussen die Entwicklung?
Zur Beantwortung dieser Fragen wurde über das erste Studienjahr hinweg eine Interviewserie
mit 13 Studierenden durchgeführt. Die Datenanalyse mithilfe grafischer Case Histories
zeigt, dass die Einstellungen der Probanden über die Zeit differenzierter werden.
Zudem gibt es Widersprüche zwischen den Einstellungen und dem wahrgenommenen normativen
Verhalten. Dabei ist die Einstellungsentwicklung von konkreten Ereignissen geprägt
und kann damit durch strukturelle Interventionen beeinflusst werden.'
author:
- first_name: Tobias
full_name: Jenert, Tobias
id: '71994'
last_name: Jenert
orcid: ' https://orcid.org/0000-0001-9262-5646'
- first_name: Taiga
full_name: Brahm, Taiga
last_name: Brahm
citation:
ama: 'Jenert T, Brahm T. Die Entwicklung studien-und hochschulbezogener Einstellungen
an einer Wirtschaftsuniversität: eine qualitative Längsschnittstudie. In: Institut
für Psychologie; 2013.'
apa: 'Jenert, T., & Brahm, T. (2013). Die Entwicklung studien-und hochschulbezogener
Einstellungen an einer Wirtschaftsuniversität: eine qualitative Längsschnittstudie.
Presented at the 14. Fachgruppentagung Pädagogische Psychologie der Deutschen
Gesellschaft für Psychologie, Hildesheim: Institut für Psychologie.'
bibtex: '@inproceedings{Jenert_Brahm_2013, title={Die Entwicklung studien-und hochschulbezogener
Einstellungen an einer Wirtschaftsuniversität: eine qualitative Längsschnittstudie},
publisher={Institut für Psychologie}, author={Jenert, Tobias and Brahm, Taiga},
year={2013} }'
chicago: 'Jenert, Tobias, and Taiga Brahm. “Die Entwicklung Studien-Und Hochschulbezogener
Einstellungen an Einer Wirtschaftsuniversität: Eine Qualitative Längsschnittstudie.”
Institut für Psychologie, 2013.'
ieee: 'T. Jenert and T. Brahm, “Die Entwicklung studien-und hochschulbezogener Einstellungen
an einer Wirtschaftsuniversität: eine qualitative Längsschnittstudie,” presented
at the 14. Fachgruppentagung Pädagogische Psychologie der Deutschen Gesellschaft
für Psychologie, Hildesheim, 2013.'
mla: 'Jenert, Tobias, and Taiga Brahm. Die Entwicklung Studien-Und Hochschulbezogener
Einstellungen an Einer Wirtschaftsuniversität: Eine Qualitative Längsschnittstudie.
Institut für Psychologie, 2013.'
short: 'T. Jenert, T. Brahm, in: Institut für Psychologie, 2013.'
conference:
end_date: 2013-09-25
location: Hildesheim
name: 14. Fachgruppentagung Pädagogische Psychologie der Deutschen Gesellschaft
für Psychologie
start_date: 2013-09-23
date_created: 2018-09-19T08:29:59Z
date_updated: 2022-01-06T07:01:06Z
department:
- _id: '208'
- _id: '282'
extern: '1'
keyword:
- student attitudes
- theory of planned behaviour
- Einstellungsentwicklung
- student motivation
publisher: Institut für Psychologie
status: public
title: 'Die Entwicklung studien-und hochschulbezogener Einstellungen an einer Wirtschaftsuniversität:
eine qualitative Längsschnittstudie'
type: conference
user_id: '51057'
year: '2013'
...
---
_id: '9805'
abstract:
- lang: eng
text: 'Piezoelectric inertia motors, also known as ``stick--slip drives'''', use
the inertia of a body to drive it in small steps by means of a friction contact.
While these steps are classically assumed to involve stiction and sliding, the
motors can also operate in ``slip--slip'''' mode without any phase of static friction.
This contribution provides a systematic investigation and performance comparison
of different stick--slip and slip--slip modes of operation. Different criteria
for comparing the motional performance of inertia motors are defined: Steady state
velocity, smoothness of motion, and start-up time. Using the example of a translational
inertia motor excited by an ideal displacement signal, it is found that the maximum
velocity reachable in stick--slip operation is limited principally, while continuous
slip--slip operation allows very high velocities. For the investigated driving
signals, the motor velocity is proportional to the square root of the actuator
stroke. The motor performance with these ideal signals defines an upper boundary
for the performance of real motors.'
author:
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Hunstig M, Hemsel T, Sextro W. Stick-slip and slip-slip operation of piezoelectric
inertia drives - Part I: Ideal Excitation. Sensors and Actuators A: Physical.
2013;200:90-100. doi:10.1016/j.sna.2012.11.012'
apa: 'Hunstig, M., Hemsel, T., & Sextro, W. (2013). Stick-slip and slip-slip
operation of piezoelectric inertia drives - Part I: Ideal Excitation. Sensors
and Actuators A: Physical, 200, 90–100. https://doi.org/10.1016/j.sna.2012.11.012'
bibtex: '@article{Hunstig_Hemsel_Sextro_2013, title={Stick-slip and slip-slip operation
of piezoelectric inertia drives - Part I: Ideal Excitation.}, volume={200}, DOI={10.1016/j.sna.2012.11.012},
journal={Sensors and Actuators A: Physical}, author={Hunstig, Matthias and Hemsel,
Tobias and Sextro, Walter}, year={2013}, pages={90–100} }'
chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “Stick-Slip and Slip-Slip
Operation of Piezoelectric Inertia Drives - Part I: Ideal Excitation.” Sensors
and Actuators A: Physical 200 (2013): 90–100. https://doi.org/10.1016/j.sna.2012.11.012.'
ieee: 'M. Hunstig, T. Hemsel, and W. Sextro, “Stick-slip and slip-slip operation
of piezoelectric inertia drives - Part I: Ideal Excitation.,” Sensors and Actuators
A: Physical, vol. 200, pp. 90–100, 2013.'
mla: 'Hunstig, Matthias, et al. “Stick-Slip and Slip-Slip Operation of Piezoelectric
Inertia Drives - Part I: Ideal Excitation.” Sensors and Actuators A: Physical,
vol. 200, 2013, pp. 90–100, doi:10.1016/j.sna.2012.11.012.'
short: 'M. Hunstig, T. Hemsel, W. Sextro, Sensors and Actuators A: Physical 200
(2013) 90–100.'
date_created: 2019-05-13T14:10:34Z
date_updated: 2022-01-06T07:04:21Z
department:
- _id: '151'
doi: 10.1016/j.sna.2012.11.012
intvolume: ' 200'
keyword:
- Inertia motor
- Stick--slip drive
- Mode of operation
- Performance indicator
- Velocity maximization
- Actuator stroke
language:
- iso: eng
page: 90 - 100
publication: 'Sensors and Actuators A: Physical'
quality_controlled: '1'
status: public
title: 'Stick-slip and slip-slip operation of piezoelectric inertia drives - Part
I: Ideal Excitation.'
type: journal_article
user_id: '55222'
volume: 200
year: '2013'
...
---
_id: '11716'
abstract:
- lang: eng
text: The accuracy of automatic speech recognition systems in noisy and reverberant
environments can be improved notably by exploiting the uncertainty of the estimated
speech features using so-called uncertainty-of-observation techniques. In this
paper, we introduce a new Bayesian decision rule that can serve as a mathematical
framework from which both known and new uncertainty-of-observation techniques
can be either derived or approximated. The new decision rule in its direct form
leads to the new significance decoding approach for Gaussian mixture models, which
results in better performance compared to standard uncertainty-of-observation
techniques in different additive and convolutive noise scenarios.
author:
- first_name: Ahmed H.
full_name: Abdelaziz, Ahmed H.
last_name: Abdelaziz
- first_name: Steffen
full_name: Zeiler, Steffen
last_name: Zeiler
- first_name: Dorothea
full_name: Kolossa, Dorothea
last_name: Kolossa
- first_name: Volker
full_name: Leutnant, Volker
last_name: Leutnant
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Abdelaziz AH, Zeiler S, Kolossa D, Leutnant V, Haeb-Umbach R. GMM-based significance
decoding. In: Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International
Conference On. ; 2013:6827-6831. doi:10.1109/ICASSP.2013.6638984'
apa: Abdelaziz, A. H., Zeiler, S., Kolossa, D., Leutnant, V., & Haeb-Umbach,
R. (2013). GMM-based significance decoding. In Acoustics, Speech and Signal
Processing (ICASSP), 2013 IEEE International Conference on (pp. 6827–6831).
https://doi.org/10.1109/ICASSP.2013.6638984
bibtex: '@inproceedings{Abdelaziz_Zeiler_Kolossa_Leutnant_Haeb-Umbach_2013, title={GMM-based
significance decoding}, DOI={10.1109/ICASSP.2013.6638984},
booktitle={Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International
Conference on}, author={Abdelaziz, Ahmed H. and Zeiler, Steffen and Kolossa, Dorothea
and Leutnant, Volker and Haeb-Umbach, Reinhold}, year={2013}, pages={6827–6831}
}'
chicago: Abdelaziz, Ahmed H., Steffen Zeiler, Dorothea Kolossa, Volker Leutnant,
and Reinhold Haeb-Umbach. “GMM-Based Significance Decoding.” In Acoustics,
Speech and Signal Processing (ICASSP), 2013 IEEE International Conference On,
6827–31, 2013. https://doi.org/10.1109/ICASSP.2013.6638984.
ieee: A. H. Abdelaziz, S. Zeiler, D. Kolossa, V. Leutnant, and R. Haeb-Umbach, “GMM-based
significance decoding,” in Acoustics, Speech and Signal Processing (ICASSP),
2013 IEEE International Conference on, 2013, pp. 6827–6831.
mla: Abdelaziz, Ahmed H., et al. “GMM-Based Significance Decoding.” Acoustics,
Speech and Signal Processing (ICASSP), 2013 IEEE International Conference On,
2013, pp. 6827–31, doi:10.1109/ICASSP.2013.6638984.
short: 'A.H. Abdelaziz, S. Zeiler, D. Kolossa, V. Leutnant, R. Haeb-Umbach, in:
Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International Conference
On, 2013, pp. 6827–6831.'
date_created: 2019-07-12T05:26:53Z
date_updated: 2022-01-06T06:51:07Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2013.6638984
keyword:
- Bayes methods
- Gaussian processes
- convolution
- decision theory
- decoding
- noise
- reverberation
- speech coding
- speech recognition
- Bayesian decision rule
- GMM
- Gaussian mixture models
- additive noise scenarios
- automatic speech recognition systems
- convolutive noise scenarios
- decoding approach
- mathematical framework
- reverberant environments
- significance decoding
- speech feature estimation
- uncertainty-of-observation techniques
- Hidden Markov models
- Maximum likelihood decoding
- Noise
- Speech
- Speech recognition
- Uncertainty
- Uncertainty-of-observation
- modified imputation
- noise robust speech recognition
- significance decoding
- uncertainty decoding
language:
- iso: eng
page: 6827-6831
publication: Acoustics, Speech and Signal Processing (ICASSP), 2013 IEEE International
Conference on
publication_identifier:
issn:
- 1520-6149
status: public
title: GMM-based significance decoding
type: conference
user_id: '44006'
year: '2013'
...
---
_id: '11740'
abstract:
- lang: eng
text: In this contribution we derive the Maximum A-Posteriori (MAP) estimates of
the parameters of a Gaussian Mixture Model (GMM) in the presence of noisy observations.
We assume the distortion to be white Gaussian noise of known mean and variance.
An approximate conjugate prior of the GMM parameters is derived allowing for a
computationally efficient implementation in a sequential estimation framework.
Simulations on artificially generated data demonstrate the superiority of the
proposed method compared to the Maximum Likelihood technique and to the ordinary
MAP approach, whose estimates are corrected by the known statistics of the distortion
in a straightforward manner.
author:
- first_name: Aleksej
full_name: Chinaev, Aleksej
last_name: Chinaev
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Chinaev A, Haeb-Umbach R. MAP-based Estimation of the Parameters of a Gaussian
Mixture Model in the Presence of Noisy Observations. In: 38th International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2013). ; 2013:3352-3356.
doi:10.1109/ICASSP.2013.6638279'
apa: Chinaev, A., & Haeb-Umbach, R. (2013). MAP-based Estimation of the Parameters
of a Gaussian Mixture Model in the Presence of Noisy Observations. In 38th
International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)
(pp. 3352–3356). https://doi.org/10.1109/ICASSP.2013.6638279
bibtex: '@inproceedings{Chinaev_Haeb-Umbach_2013, title={MAP-based Estimation of
the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations},
DOI={10.1109/ICASSP.2013.6638279},
booktitle={38th International Conference on Acoustics, Speech and Signal Processing
(ICASSP 2013)}, author={Chinaev, Aleksej and Haeb-Umbach, Reinhold}, year={2013},
pages={3352–3356} }'
chicago: Chinaev, Aleksej, and Reinhold Haeb-Umbach. “MAP-Based Estimation of the
Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations.”
In 38th International Conference on Acoustics, Speech and Signal Processing
(ICASSP 2013), 3352–56, 2013. https://doi.org/10.1109/ICASSP.2013.6638279.
ieee: A. Chinaev and R. Haeb-Umbach, “MAP-based Estimation of the Parameters of
a Gaussian Mixture Model in the Presence of Noisy Observations,” in 38th International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2013), 2013,
pp. 3352–3356.
mla: Chinaev, Aleksej, and Reinhold Haeb-Umbach. “MAP-Based Estimation of the Parameters
of a Gaussian Mixture Model in the Presence of Noisy Observations.” 38th International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2013), 2013,
pp. 3352–56, doi:10.1109/ICASSP.2013.6638279.
short: 'A. Chinaev, R. Haeb-Umbach, in: 38th International Conference on Acoustics,
Speech and Signal Processing (ICASSP 2013), 2013, pp. 3352–3356.'
date_created: 2019-07-12T05:27:20Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2013.6638279
keyword:
- Gaussian noise
- maximum likelihood estimation
- parameter estimation
- GMM parameter
- Gaussian mixture model
- MAP estimation
- Map-based estimation
- maximum a-posteriori estimation
- maximum likelihood technique
- noisy observation
- sequential estimation framework
- white Gaussian noise
- Additive noise
- Gaussian mixture model
- Maximum likelihood estimation
- Noise measurement
- Gaussian mixture model
- Maximum a posteriori estimation
- Maximum likelihood estimation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2013/ChHa13.pdf
oa: '1'
page: 3352-3356
publication: 38th International Conference on Acoustics, Speech and Signal Processing
(ICASSP 2013)
publication_identifier:
issn:
- 1520-6149
related_material:
link:
- description: Poster
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2013/ChHa13_Poster.pdf
status: public
title: MAP-based Estimation of the Parameters of a Gaussian Mixture Model in the Presence
of Noisy Observations
type: conference
user_id: '44006'
year: '2013'
...
---
_id: '11862'
abstract:
- lang: eng
text: In this contribution we extend a previously proposed Bayesian approach for
the enhancement of reverberant logarithmic mel power spectral coefficients for
robust automatic speech recognition to the additional compensation of background
noise. A recently proposed observation model is employed whose time-variant observation
error statistics are obtained as a side product of the inference of the a posteriori
probability density function of the clean speech feature vectors. Further a reduction
of the computational effort and the memory requirements are achieved by using
a recursive formulation of the observation model. The performance of the proposed
algorithms is first experimentally studied on a connected digits recognition task
with artificially created noisy reverberant data. It is shown that the use of
the time-variant observation error model leads to a significant error rate reduction
at low signal-to-noise ratios compared to a time-invariant model. Further experiments
were conducted on a 5000 word task recorded in a reverberant and noisy environment.
A significant word error rate reduction was obtained demonstrating the effectiveness
of the approach on real-world data.
author:
- first_name: Volker
full_name: Leutnant, Volker
last_name: Leutnant
- first_name: Alexander
full_name: Krueger, Alexander
last_name: Krueger
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Leutnant V, Krueger A, Haeb-Umbach R. Bayesian Feature Enhancement for Reverberation
and Noise Robust Speech Recognition. IEEE Transactions on Audio, Speech, and
Language Processing. 2013;21(8):1640-1652. doi:10.1109/TASL.2013.2258013
apa: Leutnant, V., Krueger, A., & Haeb-Umbach, R. (2013). Bayesian Feature Enhancement
for Reverberation and Noise Robust Speech Recognition. IEEE Transactions on
Audio, Speech, and Language Processing, 21(8), 1640–1652. https://doi.org/10.1109/TASL.2013.2258013
bibtex: '@article{Leutnant_Krueger_Haeb-Umbach_2013, title={Bayesian Feature Enhancement
for Reverberation and Noise Robust Speech Recognition}, volume={21}, DOI={10.1109/TASL.2013.2258013},
number={8}, journal={IEEE Transactions on Audio, Speech, and Language Processing},
author={Leutnant, Volker and Krueger, Alexander and Haeb-Umbach, Reinhold}, year={2013},
pages={1640–1652} }'
chicago: 'Leutnant, Volker, Alexander Krueger, and Reinhold Haeb-Umbach. “Bayesian
Feature Enhancement for Reverberation and Noise Robust Speech Recognition.” IEEE
Transactions on Audio, Speech, and Language Processing 21, no. 8 (2013): 1640–52.
https://doi.org/10.1109/TASL.2013.2258013.'
ieee: V. Leutnant, A. Krueger, and R. Haeb-Umbach, “Bayesian Feature Enhancement
for Reverberation and Noise Robust Speech Recognition,” IEEE Transactions on
Audio, Speech, and Language Processing, vol. 21, no. 8, pp. 1640–1652, 2013.
mla: Leutnant, Volker, et al. “Bayesian Feature Enhancement for Reverberation and
Noise Robust Speech Recognition.” IEEE Transactions on Audio, Speech, and Language
Processing, vol. 21, no. 8, 2013, pp. 1640–52, doi:10.1109/TASL.2013.2258013.
short: V. Leutnant, A. Krueger, R. Haeb-Umbach, IEEE Transactions on Audio, Speech,
and Language Processing 21 (2013) 1640–1652.
date_created: 2019-07-12T05:29:42Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/TASL.2013.2258013
intvolume: ' 21'
issue: '8'
keyword:
- Bayes methods
- compensation
- error statistics
- reverberation
- speech recognition
- Bayesian feature enhancement
- background noise
- clean speech feature vectors
- compensation
- connected digits recognition task
- error statistics
- memory requirements
- noisy reverberant data
- posteriori probability density function
- recursive formulation
- reverberant logarithmic mel power spectral coefficients
- robust automatic speech recognition
- signal-to-noise ratios
- time-variant observation
- word error rate reduction
- Robust automatic speech recognition
- model-based Bayesian feature enhancement
- observation model for reverberant and noisy speech
- recursive observation model
language:
- iso: eng
page: 1640-1652
publication: IEEE Transactions on Audio, Speech, and Language Processing
status: public
title: Bayesian Feature Enhancement for Reverberation and Noise Robust Speech Recognition
type: journal_article
user_id: '44006'
volume: 21
year: '2013'
...