---
_id: '11832'
abstract:
- lang: eng
text: In this paper we propose an approach to retrieve the absolute geometry of
an acoustic sensor network, consisting of spatially distributed microphone arrays,
from reverberant speech input. The calibration relies on direction of arrival
measurements of the individual arrays. The proposed calibration algorithm is derived
from a maximum-likelihood approach employing circular statistics. Since a sensor
node consists of a microphone array with known intra-array geometry, we are able
to obtain an absolute geometry estimate, including angles and distances. Simulation
results demonstrate the effectiveness of the approach.
author:
- first_name: Florian
full_name: Jacob, Florian
last_name: Jacob
- first_name: Joerg
full_name: Schmalenstroeer, Joerg
id: '460'
last_name: Schmalenstroeer
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Jacob F, Schmalenstroeer J, Haeb-Umbach R. DoA-Based Microphone Array Position
Self-Calibration Using Circular Statistic. In: 38th International Conference
on Acoustics, Speech, and Signal Processing (ICASSP 2013). ; 2013:116-120.
doi:10.1109/ICASSP.2013.6637620'
apa: Jacob, F., Schmalenstroeer, J., & Haeb-Umbach, R. (2013). DoA-Based Microphone
Array Position Self-Calibration Using Circular Statistic. 38th International
Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013), 116–120.
https://doi.org/10.1109/ICASSP.2013.6637620
bibtex: '@inproceedings{Jacob_Schmalenstroeer_Haeb-Umbach_2013, title={DoA-Based
Microphone Array Position Self-Calibration Using Circular Statistic}, DOI={10.1109/ICASSP.2013.6637620},
booktitle={38th International Conference on Acoustics, Speech, and Signal Processing
(ICASSP 2013)}, author={Jacob, Florian and Schmalenstroeer, Joerg and Haeb-Umbach,
Reinhold}, year={2013}, pages={116–120} }'
chicago: Jacob, Florian, Joerg Schmalenstroeer, and Reinhold Haeb-Umbach. “DoA-Based
Microphone Array Position Self-Calibration Using Circular Statistic.” In 38th
International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013),
116–20, 2013. https://doi.org/10.1109/ICASSP.2013.6637620.
ieee: 'F. Jacob, J. Schmalenstroeer, and R. Haeb-Umbach, “DoA-Based Microphone Array
Position Self-Calibration Using Circular Statistic,” in 38th International
Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013), 2013,
pp. 116–120, doi: 10.1109/ICASSP.2013.6637620.'
mla: Jacob, Florian, et al. “DoA-Based Microphone Array Position Self-Calibration
Using Circular Statistic.” 38th International Conference on Acoustics, Speech,
and Signal Processing (ICASSP 2013), 2013, pp. 116–20, doi:10.1109/ICASSP.2013.6637620.
short: 'F. Jacob, J. Schmalenstroeer, R. Haeb-Umbach, in: 38th International Conference
on Acoustics, Speech, and Signal Processing (ICASSP 2013), 2013, pp. 116–120.'
date_created: 2019-07-12T05:29:07Z
date_updated: 2023-10-26T08:11:12Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2013.6637620
keyword:
- Geometry calibration
- microphone arrays
- position self-calibration
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2013/JacSchHae_ICASSP2013_Rev2.pdf
oa: '1'
page: 116-120
publication: 38th International Conference on Acoustics, Speech, and Signal Processing
(ICASSP 2013)
publication_identifier:
issn:
- 1520-6149
quality_controlled: '1'
related_material:
link:
- description: Presentation
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2013/JaScHa13_Presentation.pdf
status: public
title: DoA-Based Microphone Array Position Self-Calibration Using Circular Statistic
type: conference
user_id: '460'
year: '2013'
...
---
_id: '37109'
abstract:
- lang: eng
text: This study examines the effect of audit on private firms’ cost of debt. We
use a sample of 1,949 small private firms operating in the period 2006-2010 with
optional financial statement audit. High quality data allows us to construct a
more precise interest rate measure than existing studies employ. After controlling
for obvious sources of demand for voluntary audits (ownership complexity, subsidiary
status, bank relations), we find a robust central result that voluntary audits
increase rather than decrease the cost of debt financing, contrary to several
existing studies. This finding indicates that voluntary audits are generally treated
as “adopting a label” and penalised by creditors, regardless of the perceived
auditor quality as a result of the lemon problem in the audit market. Even Big-4
audits increase the cost of debt, likely as a result due to the lemon problem
in the audit market, although the increase is smaller than for non-Big-4 audits.
The results are sensitive to the estimation method used (OLS, Heckman’s two-step,
PSM) and (sub-)sample selection. We show that disregarding the underlying assumptions
of these estimation methods may lead to incorrect inferences. Additional analyses
show that audited firms’ reported earnings are less informative about future operating
performance than earnings of their unaudited counterparts. Our results also indicate
that results are sensitive to cost of debt definition and this might have affected
the results reported in the existing literature.
author:
- first_name: Urska
full_name: Kosi, Urska
id: '54068'
last_name: Kosi
- first_name: Jerney
full_name: Koren, Jerney
last_name: Koren
- first_name: Aljosa
full_name: Valentincic, Aljosa
last_name: Valentincic
citation:
ama: 'Kosi U, Koren J, Valentincic A. Does Financial Statement Audit Reduce the
Cost of Debt of Private Firms? In: ; 2013.'
apa: Kosi, U., Koren, J., & Valentincic, A. (2013). Does Financial Statement
Audit Reduce the Cost of Debt of Private Firms? 36th Annual Congress of European
Accounting Association, Paris, France.
bibtex: '@inproceedings{Kosi_Koren_Valentincic_2013, title={Does Financial Statement
Audit Reduce the Cost of Debt of Private Firms?}, author={Kosi, Urska and Koren,
Jerney and Valentincic, Aljosa}, year={2013} }'
chicago: Kosi, Urska, Jerney Koren, and Aljosa Valentincic. “Does Financial Statement
Audit Reduce the Cost of Debt of Private Firms?,” 2013.
ieee: U. Kosi, J. Koren, and A. Valentincic, “Does Financial Statement Audit Reduce
the Cost of Debt of Private Firms?,” presented at the 36th Annual Congress of
European Accounting Association, Paris, France, 2013.
mla: Kosi, Urska, et al. Does Financial Statement Audit Reduce the Cost of Debt
of Private Firms? 2013.
short: 'U. Kosi, J. Koren, A. Valentincic, in: 2013.'
conference:
end_date: 2013-05-05
location: Paris, France
name: 36th Annual Congress of European Accounting Association
start_date: 2013-05-02
date_created: 2023-01-17T13:25:30Z
date_updated: 2023-01-17T13:51:24Z
department:
- _id: '635'
- _id: '186'
- _id: '551'
extern: '1'
keyword:
- private firms
- voluntary audit
- cost of debt
- self-selection bias
- lemon problem
language:
- iso: eng
main_file_link:
- url: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2373987
status: public
title: Does Financial Statement Audit Reduce the Cost of Debt of Private Firms?
type: conference
user_id: '88603'
year: '2013'
...
---
_id: '22737'
author:
- first_name: Matthias
full_name: Becker, Matthias
last_name: Becker
- first_name: Markus
full_name: Luckey, Markus
last_name: Luckey
- first_name: Steffen
full_name: Becker, Steffen
last_name: Becker
citation:
ama: 'Becker M, Luckey M, Becker S. Model-driven Performance Engineering of Self-adaptive
Systems: A Survey. In: {Proceedings of the 8th International ACM SIGSOFT Conference
on Quality of Software Architectures (QoSA)}. New York, NY, USA: ACM; 2012:117-122.
doi:10.1145/2304696.2304716'
apa: 'Becker, M., Luckey, M., & Becker, S. (2012). Model-driven Performance
Engineering of Self-adaptive Systems: A Survey. In {Proceedings of the 8th
International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}
(pp. 117–122). New York, NY, USA: ACM. https://doi.org/10.1145/2304696.2304716'
bibtex: '@inproceedings{Becker_Luckey_Becker_2012, place={New York, NY, USA}, title={Model-driven
Performance Engineering of Self-adaptive Systems: A Survey}, DOI={10.1145/2304696.2304716},
booktitle={{Proceedings of the 8th International ACM SIGSOFT Conference on Quality
of Software Architectures (QoSA)}}, publisher={ACM}, author={Becker, Matthias
and Luckey, Markus and Becker, Steffen}, year={2012}, pages={117–122} }'
chicago: 'Becker, Matthias, Markus Luckey, and Steffen Becker. “Model-Driven Performance
Engineering of Self-Adaptive Systems: A Survey.” In {Proceedings of the 8th
International ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)},
117–22. New York, NY, USA: ACM, 2012. https://doi.org/10.1145/2304696.2304716.'
ieee: 'M. Becker, M. Luckey, and S. Becker, “Model-driven Performance Engineering
of Self-adaptive Systems: A Survey,” in {Proceedings of the 8th International
ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}, 2012,
pp. 117–122.'
mla: 'Becker, Matthias, et al. “Model-Driven Performance Engineering of Self-Adaptive
Systems: A Survey.” {Proceedings of the 8th International ACM SIGSOFT Conference
on Quality of Software Architectures (QoSA)}, ACM, 2012, pp. 117–22, doi:10.1145/2304696.2304716.'
short: 'M. Becker, M. Luckey, S. Becker, in: {Proceedings of the 8th International
ACM SIGSOFT Conference on Quality of Software Architectures (QoSA)}, ACM, New
York, NY, USA, 2012, pp. 117–122.'
date_created: 2021-07-15T08:38:08Z
date_updated: 2022-01-06T06:55:39Z
doi: 10.1145/2304696.2304716
keyword:
- model-driven performance engineering
- self-*
- Self-adaptation
- software performance
page: 117-122
place: New York, NY, USA
publication: '{Proceedings of the 8th International ACM SIGSOFT Conference on Quality
of Software Architectures (QoSA)}'
publication_identifier:
isbn:
- 978-1-4503-1346-9
publisher: ACM
status: public
title: 'Model-driven Performance Engineering of Self-adaptive Systems: A Survey'
type: conference
user_id: '4870'
year: '2012'
...
---
_id: '5718'
abstract:
- lang: eng
text: The role of information and communication technology for economic growth has
been emphasized repeatedly. Technological breakthroughs have generated new forms
of services, such as self-services or remote services. Although these encounters
are qualitatively different from traditional service provision, prior service
management literature thus far had paid little attention to theory development
and the systematization of technology-based service encounters. To fill this research
gap, the present study outlines how new types of technology-based services fit
into existing service typologies and provides an extension of existing frameworks
to capture their unique characteristics. These insights in turn offer managerial
implications and highlight open research questions.
article_type: original
author:
- first_name: Jan H
full_name: Schumann, Jan H
last_name: Schumann
- first_name: Nancy
full_name: Wünderlich, Nancy
id: '36392'
last_name: Wünderlich
- first_name: Florian
full_name: Wangenheim, Florian
last_name: Wangenheim
citation:
ama: 'Schumann JH, Wünderlich N, Wangenheim F. Technology Mediation in Service Delivery:
A New Typology and an Agenda for Managers and Academics. Technovation.
2012;32(2):133-143.'
apa: 'Schumann, J. H., Wünderlich, N., & Wangenheim, F. (2012). Technology Mediation
in Service Delivery: A New Typology and an Agenda for Managers and Academics.
Technovation, 32(2), 133–143.'
bibtex: '@article{Schumann_Wünderlich_Wangenheim_2012, title={Technology Mediation
in Service Delivery: A New Typology and an Agenda for Managers and Academics.},
volume={32}, number={2}, journal={Technovation}, publisher={Elsevier}, author={Schumann,
Jan H and Wünderlich, Nancy and Wangenheim, Florian}, year={2012}, pages={133–143}
}'
chicago: 'Schumann, Jan H, Nancy Wünderlich, and Florian Wangenheim. “Technology
Mediation in Service Delivery: A New Typology and an Agenda for Managers and Academics.”
Technovation 32, no. 2 (2012): 133–43.'
ieee: 'J. H. Schumann, N. Wünderlich, and F. Wangenheim, “Technology Mediation in
Service Delivery: A New Typology and an Agenda for Managers and Academics.,” Technovation,
vol. 32, no. 2, pp. 133–143, 2012.'
mla: 'Schumann, Jan H., et al. “Technology Mediation in Service Delivery: A New
Typology and an Agenda for Managers and Academics.” Technovation, vol.
32, no. 2, Elsevier, 2012, pp. 133–43.'
short: J.H. Schumann, N. Wünderlich, F. Wangenheim, Technovation 32 (2012) 133–143.
date_created: 2018-11-16T09:43:45Z
date_updated: 2022-01-06T07:02:37Z
department:
- _id: '181'
intvolume: ' 32'
issue: '2'
keyword:
- Services
- Remote services
- Self-services
- Technology mediation
language:
- iso: eng
page: 133-143
publication: Technovation
publication_status: published
publisher: Elsevier
status: public
title: 'Technology Mediation in Service Delivery: A New Typology and an Agenda for
Managers and Academics.'
type: journal_article
user_id: '37741'
volume: 32
year: '2012'
...
---
_id: '9783'
abstract:
- lang: eng
text: To optimize the ultrasound irradiation for cavitation based ultrasound applications
like sonochemistry or ultrasound cleaning, the correlation between cavitation
intensity and the resulting effect on the process is of interest. Furthermore,
changing conditions like temperature and pressure result in varying acoustic properties
of the liquid. That might necessitate an adaption of the ultrasound irradiation.
To detect such changes during operation, process monitoring is desired. Labor
intensive processes, that might be carried out for several hours, also require
process monitoring to increase their reliability by detection of changes or malfunctions
during operation. In some applications cavitation detection and monitoring can
be achieved by the application of sensors in the sound field. Though the application
of sensors is possible, this necessitates modifications on the system and the
sensor might disturb the sound field. In other applications harsh, process conditions
prohibit the application of sensors in the sound field. Therefore alternative
techniques for cavitation detection and monitoring are desired. The applicability
of an external microphone and a self-sensing ultrasound transducer for cavitation
detection were experimentally investigated. Both methods were found to be suitable
and easily applicable.
author:
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: 'Bornmann P, Hemsel T, Sextro W, Maeda T, Morita T. Non-perturbing cavitation
detection / monitoring in sonochemical reactors. In: Ultrasonics Symposium
(IUS), 2012 IEEE International. ; 2012:1141-1144. doi:10.1109/ULTSYM.2012.0284'
apa: Bornmann, P., Hemsel, T., Sextro, W., Maeda, T., & Morita, T. (2012). Non-perturbing
cavitation detection / monitoring in sonochemical reactors. In Ultrasonics
Symposium (IUS), 2012 IEEE International (pp. 1141–1144). https://doi.org/10.1109/ULTSYM.2012.0284
bibtex: '@inproceedings{Bornmann_Hemsel_Sextro_Maeda_Morita_2012, title={Non-perturbing
cavitation detection / monitoring in sonochemical reactors}, DOI={10.1109/ULTSYM.2012.0284},
booktitle={Ultrasonics Symposium (IUS), 2012 IEEE International}, author={Bornmann,
Peter and Hemsel, Tobias and Sextro, Walter and Maeda, Takafumi and Morita, Takeshi},
year={2012}, pages={1141–1144} }'
chicago: Bornmann, Peter, Tobias Hemsel, Walter Sextro, Takafumi Maeda, and Takeshi
Morita. “Non-Perturbing Cavitation Detection / Monitoring in Sonochemical Reactors.”
In Ultrasonics Symposium (IUS), 2012 IEEE International, 1141–44, 2012.
https://doi.org/10.1109/ULTSYM.2012.0284.
ieee: P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, and T. Morita, “Non-perturbing
cavitation detection / monitoring in sonochemical reactors,” in Ultrasonics
Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.
mla: Bornmann, Peter, et al. “Non-Perturbing Cavitation Detection / Monitoring in
Sonochemical Reactors.” Ultrasonics Symposium (IUS), 2012 IEEE International,
2012, pp. 1141–44, doi:10.1109/ULTSYM.2012.0284.
short: 'P. Bornmann, T. Hemsel, W. Sextro, T. Maeda, T. Morita, in: Ultrasonics
Symposium (IUS), 2012 IEEE International, 2012, pp. 1141–1144.'
date_created: 2019-05-13T13:18:49Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2012.0284
keyword:
- cavitation
- chemical reactors
- microphones
- process monitoring
- reliability
- ultrasonic applications
- ultrasonic waves
- acoustic properties
- cavitation based ultrasound applications
- cavitation intensity
- change detection reliability
- external microphone
- malfunction detection reliability
- nonperturbing cavitation detection
- nonperturbing cavitation monitoring
- process monitoring
- self-sensing ultrasound transducer
- sonochemical reactors
- sonochemistry
- ultrasound cleaning
- ultrasound irradiation
- Acoustics
- Liquids
- Monitoring
- Sensors
- Sonar equipment
- Transducers
- Ultrasonic imaging
language:
- iso: eng
page: 1141-1144
publication: Ultrasonics Symposium (IUS), 2012 IEEE International
publication_identifier:
issn:
- 1948-5719
quality_controlled: '1'
status: public
title: Non-perturbing cavitation detection / monitoring in sonochemical reactors
type: conference
user_id: '55222'
year: '2012'
...
---
_id: '9786'
abstract:
- lang: eng
text: Self-optimizing mechatronic systems are a new class of technical systems.
On the one hand, new challenges regarding dependability arise from their additional
complexity and adaptivity. On the other hand, their abilities enable new concepts
and methods to improve the dependability of mechatronic systems. This paper introduces
a multi-level dependability concept for selfoptimizing mechatronic systems and
shows how probabilistic planning can be used to improve the availability and reliability
of systems in the operating phase. The general idea to improve the availability
of autonomous systems by applying probabilistic planning methods to avoid energy
shortages is exemplified on the example of an innovative railway vehicle.
author:
- first_name: Benjamin
full_name: Klöpper, Benjamin
last_name: Klöpper
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Christoph
full_name: Romaus, Christoph
last_name: Romaus
citation:
ama: Klöpper B, Sondermann-Wölke C, Romaus C. Probabilistic Planning for Predictive
Condition Monitoring and Adaptation Within the Self-Optimizing Energy Management
of an Autonomous Railway Vehicle. Journal of Robotics and Mechatronics.
2012;24(1):5-15.
apa: Klöpper, B., Sondermann-Wölke, C., & Romaus, C. (2012). Probabilistic Planning
for Predictive Condition Monitoring and Adaptation Within the Self-Optimizing
Energy Management of an Autonomous Railway Vehicle. Journal of Robotics and
Mechatronics, 24(1), 5–15.
bibtex: '@article{Klöpper_Sondermann-Wölke_Romaus_2012, title={Probabilistic Planning
for Predictive Condition Monitoring and Adaptation Within the Self-Optimizing
Energy Management of an Autonomous Railway Vehicle}, volume={24}, number={1},
journal={Journal of Robotics and Mechatronics}, author={Klöpper, Benjamin and
Sondermann-Wölke, Christoph and Romaus, Christoph}, year={2012}, pages={5–15}
}'
chicago: 'Klöpper, Benjamin, Christoph Sondermann-Wölke, and Christoph Romaus. “Probabilistic
Planning for Predictive Condition Monitoring and Adaptation Within the Self-Optimizing
Energy Management of an Autonomous Railway Vehicle.” Journal of Robotics and
Mechatronics 24, no. 1 (2012): 5–15.'
ieee: B. Klöpper, C. Sondermann-Wölke, and C. Romaus, “Probabilistic Planning for
Predictive Condition Monitoring and Adaptation Within the Self-Optimizing Energy
Management of an Autonomous Railway Vehicle,” Journal of Robotics and Mechatronics,
vol. 24, no. 1, pp. 5–15, 2012.
mla: Klöpper, Benjamin, et al. “Probabilistic Planning for Predictive Condition
Monitoring and Adaptation Within the Self-Optimizing Energy Management of an Autonomous
Railway Vehicle.” Journal of Robotics and Mechatronics, vol. 24, no. 1,
2012, pp. 5–15.
short: B. Klöpper, C. Sondermann-Wölke, C. Romaus, Journal of Robotics and Mechatronics
24 (2012) 5–15.
date_created: 2019-05-13T13:23:45Z
date_updated: 2022-01-06T07:04:20Z
department:
- _id: '151'
intvolume: ' 24'
issue: '1'
keyword:
- self-optimizing systems
- dependability
- probabilistic planning
- energy management
language:
- iso: eng
page: 5-15
publication: Journal of Robotics and Mechatronics
quality_controlled: '1'
status: public
title: Probabilistic Planning for Predictive Condition Monitoring and Adaptation Within
the Self-Optimizing Energy Management of an Autonomous Railway Vehicle
type: journal_article
user_id: '55222'
volume: 24
year: '2012'
...
---
_id: '11833'
abstract:
- lang: eng
text: In this paper we propose an approach to retrieve the geometry of an acoustic
sensor network consisting of spatially distributed microphone arrays from unconstrained
speech input. The calibration relies on Direction of Arrival (DoA) measurements
which do not require a clock synchronization among the sensor nodes. The calibration
problem is formulated as a cost function optimization task, which minimizes the
squared differences between measured and predicted observations and additionally
avoids the existence of minima that correspond to mirrored versions of the actual
sensor orientations. Further, outlier measurements caused by reverberation are
mitigated by a Random Sample Consensus (RANSAC) approach. The experimental results
show a mean positioning error of at most 25 cm even in highly reverberant environments.
author:
- first_name: Florian
full_name: Jacob, Florian
last_name: Jacob
- first_name: Joerg
full_name: Schmalenstroeer, Joerg
id: '460'
last_name: Schmalenstroeer
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Jacob F, Schmalenstroeer J, Haeb-Umbach R. Microphone Array Position Self-Calibration
from Reverberant Speech Input. In: International Workshop on Acoustic Signal
Enhancement (IWAENC 2012). ; 2012.'
apa: Jacob, F., Schmalenstroeer, J., & Haeb-Umbach, R. (2012). Microphone Array
Position Self-Calibration from Reverberant Speech Input. International Workshop
on Acoustic Signal Enhancement (IWAENC 2012).
bibtex: '@inproceedings{Jacob_Schmalenstroeer_Haeb-Umbach_2012, title={Microphone
Array Position Self-Calibration from Reverberant Speech Input}, booktitle={International
Workshop on Acoustic Signal Enhancement (IWAENC 2012)}, author={Jacob, Florian
and Schmalenstroeer, Joerg and Haeb-Umbach, Reinhold}, year={2012} }'
chicago: Jacob, Florian, Joerg Schmalenstroeer, and Reinhold Haeb-Umbach. “Microphone
Array Position Self-Calibration from Reverberant Speech Input.” In International
Workshop on Acoustic Signal Enhancement (IWAENC 2012), 2012.
ieee: F. Jacob, J. Schmalenstroeer, and R. Haeb-Umbach, “Microphone Array Position
Self-Calibration from Reverberant Speech Input,” 2012.
mla: Jacob, Florian, et al. “Microphone Array Position Self-Calibration from Reverberant
Speech Input.” International Workshop on Acoustic Signal Enhancement (IWAENC
2012), 2012.
short: 'F. Jacob, J. Schmalenstroeer, R. Haeb-Umbach, in: International Workshop
on Acoustic Signal Enhancement (IWAENC 2012), 2012.'
date_created: 2019-07-12T05:29:08Z
date_updated: 2023-10-26T08:10:52Z
department:
- _id: '54'
keyword:
- Unsupervised
- geometry calibration
- microphone arrays
- position self-calibration
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2012/JaScHa12.pdf
oa: '1'
publication: International Workshop on Acoustic Signal Enhancement (IWAENC 2012)
quality_controlled: '1'
related_material:
link:
- description: Video
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2012/Microphine_Array_Position_Self-Calibration_from_Reverberant_Speech_Input.mp4
- description: Poster
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2012/JaScHa12_Poster.pdf
- description: Demonstrator
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2012/JaScHa12_Demonstrator.pdf
status: public
title: Microphone Array Position Self-Calibration from Reverberant Speech Input
type: conference
user_id: '460'
year: '2012'
...
---
_id: '11850'
abstract:
- lang: eng
text: In this paper, we present a novel blocking matrix and fixed beamformer design
for a generalized sidelobe canceler for speech enhancement in a reverberant enclosure.
They are based on a new method for estimating the acoustical transfer function
ratios in the presence of stationary noise. The estimation method relies on solving
a generalized eigenvalue problem in each frequency bin. An adaptive eigenvector
tracking utilizing the power iteration method is employed and shown to achieve
a high convergence speed. Simulation results demonstrate that the proposed beamformer
leads to better noise and interference reduction and reduced speech distortions
compared to other blocking matrix designs from the literature.
author:
- first_name: Alexander
full_name: Krueger, Alexander
last_name: Krueger
- first_name: Ernst
full_name: Warsitz, Ernst
last_name: Warsitz
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Krueger A, Warsitz E, Haeb-Umbach R. Speech Enhancement With a GSC-Like Structure
Employing Eigenvector-Based Transfer Function Ratios Estimation. IEEE Transactions
on Audio, Speech, and Language Processing. 2011;19(1):206-219. doi:10.1109/TASL.2010.2047324
apa: Krueger, A., Warsitz, E., & Haeb-Umbach, R. (2011). Speech Enhancement
With a GSC-Like Structure Employing Eigenvector-Based Transfer Function Ratios
Estimation. IEEE Transactions on Audio, Speech, and Language Processing,
19(1), 206–219. https://doi.org/10.1109/TASL.2010.2047324
bibtex: '@article{Krueger_Warsitz_Haeb-Umbach_2011, title={Speech Enhancement With
a GSC-Like Structure Employing Eigenvector-Based Transfer Function Ratios Estimation},
volume={19}, DOI={10.1109/TASL.2010.2047324},
number={1}, journal={IEEE Transactions on Audio, Speech, and Language Processing},
author={Krueger, Alexander and Warsitz, Ernst and Haeb-Umbach, Reinhold}, year={2011},
pages={206–219} }'
chicago: 'Krueger, Alexander, Ernst Warsitz, and Reinhold Haeb-Umbach. “Speech Enhancement
With a GSC-Like Structure Employing Eigenvector-Based Transfer Function Ratios
Estimation.” IEEE Transactions on Audio, Speech, and Language Processing
19, no. 1 (2011): 206–19. https://doi.org/10.1109/TASL.2010.2047324.'
ieee: A. Krueger, E. Warsitz, and R. Haeb-Umbach, “Speech Enhancement With a GSC-Like
Structure Employing Eigenvector-Based Transfer Function Ratios Estimation,” IEEE
Transactions on Audio, Speech, and Language Processing, vol. 19, no. 1, pp.
206–219, 2011.
mla: Krueger, Alexander, et al. “Speech Enhancement With a GSC-Like Structure Employing
Eigenvector-Based Transfer Function Ratios Estimation.” IEEE Transactions on
Audio, Speech, and Language Processing, vol. 19, no. 1, 2011, pp. 206–19,
doi:10.1109/TASL.2010.2047324.
short: A. Krueger, E. Warsitz, R. Haeb-Umbach, IEEE Transactions on Audio, Speech,
and Language Processing 19 (2011) 206–219.
date_created: 2019-07-12T05:29:28Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/TASL.2010.2047324
intvolume: ' 19'
issue: '1'
keyword:
- acoustical transfer function ratio
- adaptive eigenvector tracking
- array signal processing
- beamformer design
- blocking matrix
- eigenvalues and eigenfunctions
- eigenvector-based transfer function ratios estimation
- generalized sidelobe canceler
- interference reduction
- iterative methods
- power iteration method
- reduced speech distortions
- reverberant enclosure
- reverberation
- speech enhancement
- stationary noise
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2011/KrWaHa11.pdf
oa: '1'
page: 206-219
publication: IEEE Transactions on Audio, Speech, and Language Processing
status: public
title: Speech Enhancement With a GSC-Like Structure Employing Eigenvector-Based Transfer
Function Ratios Estimation
type: journal_article
user_id: '44006'
volume: 19
year: '2011'
...
---
_id: '4551'
abstract:
- lang: eng
text: An intentional positioning of optically active quantum dots using site-selective
growth by a combination of molecular beam epitaxy (MBE) and focused ion beam (FIB)
implantation in an all-ultra-high-vacuum (UHV) setup has been successfully demonstrated.
A square array of periodic holes on GaAs substrate was fabricated with FIB of
30 keV ions followed by an in situ annealing step. Subsequently, the patterned
holes were overgrown with an optimized amount of InAs in order to achieve site-selective
growth of the QDs on the patterned holes. Under well-optimized conditions, a selectivity
of single quantum dot growth in the patterned holes of 52% was achieved. Thereafter,
carrier injection and subsequent radiative recombination from the positioned InAs/GaAs
self-assembled QDs was investigated by embedding the QDs in the intrinsic part
of a GaAs-based p–i–n junction device. Electroluminescence spectra taken at 77
K show interband transitions up to the fifth excited state from the QDs.
article_type: original
author:
- first_name: Minisha
full_name: Mehta, Minisha
last_name: Mehta
- first_name: Dirk
full_name: Reuter, Dirk
id: '37763'
last_name: Reuter
- first_name: Alexander
full_name: Melnikov, Alexander
last_name: Melnikov
- first_name: Andreas D.
full_name: Wieck, Andreas D.
last_name: Wieck
- first_name: Steffen
full_name: Michaelis de Vasconcellos, Steffen
last_name: Michaelis de Vasconcellos
- first_name: Tim
full_name: Baumgarten, Tim
last_name: Baumgarten
- first_name: Artur
full_name: Zrenner, Artur
id: '606'
last_name: Zrenner
orcid: 0000-0002-5190-0944
- first_name: Cedrik
full_name: Meier, Cedrik
id: '20798'
last_name: Meier
orcid: https://orcid.org/0000-0002-3787-3572
citation:
ama: 'Mehta M, Reuter D, Melnikov A, et al. Intentionally positioned self-assembled
InAs quantum dots in an electroluminescent p–i–n junction diode. Physica E:
Low-dimensional Systems and Nanostructures. 2010;42(10):2749-2752. doi:10.1016/j.physe.2009.12.053'
apa: 'Mehta, M., Reuter, D., Melnikov, A., Wieck, A. D., Michaelis de Vasconcellos,
S., Baumgarten, T., … Meier, C. (2010). Intentionally positioned self-assembled
InAs quantum dots in an electroluminescent p–i–n junction diode. Physica E:
Low-Dimensional Systems and Nanostructures, 42(10), 2749–2752. https://doi.org/10.1016/j.physe.2009.12.053'
bibtex: '@article{Mehta_Reuter_Melnikov_Wieck_Michaelis de Vasconcellos_Baumgarten_Zrenner_Meier_2010,
title={Intentionally positioned self-assembled InAs quantum dots in an electroluminescent
p–i–n junction diode}, volume={42}, DOI={10.1016/j.physe.2009.12.053},
number={10}, journal={Physica E: Low-dimensional Systems and Nanostructures},
publisher={Elsevier BV}, author={Mehta, Minisha and Reuter, Dirk and Melnikov,
Alexander and Wieck, Andreas D. and Michaelis de Vasconcellos, Steffen and Baumgarten,
Tim and Zrenner, Artur and Meier, Cedrik}, year={2010}, pages={2749–2752} }'
chicago: 'Mehta, Minisha, Dirk Reuter, Alexander Melnikov, Andreas D. Wieck, Steffen
Michaelis de Vasconcellos, Tim Baumgarten, Artur Zrenner, and Cedrik Meier. “Intentionally
Positioned Self-Assembled InAs Quantum Dots in an Electroluminescent p–i–n Junction
Diode.” Physica E: Low-Dimensional Systems and Nanostructures 42, no. 10
(2010): 2749–52. https://doi.org/10.1016/j.physe.2009.12.053.'
ieee: 'M. Mehta et al., “Intentionally positioned self-assembled InAs quantum
dots in an electroluminescent p–i–n junction diode,” Physica E: Low-dimensional
Systems and Nanostructures, vol. 42, no. 10, pp. 2749–2752, 2010.'
mla: 'Mehta, Minisha, et al. “Intentionally Positioned Self-Assembled InAs Quantum
Dots in an Electroluminescent p–i–n Junction Diode.” Physica E: Low-Dimensional
Systems and Nanostructures, vol. 42, no. 10, Elsevier BV, 2010, pp. 2749–52,
doi:10.1016/j.physe.2009.12.053.'
short: 'M. Mehta, D. Reuter, A. Melnikov, A.D. Wieck, S. Michaelis de Vasconcellos,
T. Baumgarten, A. Zrenner, C. Meier, Physica E: Low-Dimensional Systems and Nanostructures
42 (2010) 2749–2752.'
date_created: 2018-09-20T12:42:40Z
date_updated: 2022-01-06T07:01:09Z
department:
- _id: '15'
- _id: '230'
- _id: '35'
- _id: '287'
doi: 10.1016/j.physe.2009.12.053
intvolume: ' 42'
issue: '10'
keyword:
- Molecular beam epitaxy
- Focused ion beam
- Self-assembled quantum dot
- Electroluminescence
language:
- iso: eng
page: 2749-2752
publication: 'Physica E: Low-dimensional Systems and Nanostructures'
publication_identifier:
issn:
- 1386-9477
publication_status: published
publisher: Elsevier BV
status: public
title: Intentionally positioned self-assembled InAs quantum dots in an electroluminescent
p–i–n junction diode
type: journal_article
user_id: '20798'
volume: 42
year: '2010'
...
---
_id: '9760'
abstract:
- lang: eng
text: Self-optimizing systems are able to adapt their behavior autonomously according
to their current self-determined objectives. Unforeseen influences could lead
to dependability-critical behavior of the system. Methods are required which secure
self-optimizing systems during operation. These methods to increase the dependability
of the system should already be taken into consideration in the design process.
This paper presents a guideline for the dependability-oriented design of self-optimizing
systems, which integrates established classical methods like failure mode and
effects analysis as well as methods based on self-optimization. On the one hand
self-optimization is used to increase the dependability of the system by integrating
objectives like safety, availability, and reliability to the objectives of the
system. On the other hand methods are required to ensure the self-optimization
itself. As basis for this guideline serves the principle solution of the system.
The six phases of the guideline extend the design process and lead to an enhanced
principle solution. Additionally, the guideline illustrates phases to implement
and validate the self-optimizing system. The proposed guideline is applied to
an innovative rail-bound vehicle, called RailCab, which is equipped with self-optimizing
function modules.
author:
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Jürgen
full_name: Gausemeier, Jürgen
last_name: Gausemeier
- first_name: Sebastian
full_name: Pook, Sebastian
last_name: Pook
citation:
ama: 'Sondermann-Wölke C, Hemsel T, Sextro W, Gausemeier J, Pook S. Guideline for
the dependability-oriented design of self-optimizing systems. In: Industrial
Informatics (INDIN), 2010 8th IEEE International Conference On. ; 2010:739-744.
doi:10.1109/INDIN.2010.5549490'
apa: Sondermann-Wölke, C., Hemsel, T., Sextro, W., Gausemeier, J., & Pook, S.
(2010). Guideline for the dependability-oriented design of self-optimizing systems.
In Industrial Informatics (INDIN), 2010 8th IEEE International Conference on
(pp. 739–744). https://doi.org/10.1109/INDIN.2010.5549490
bibtex: '@inproceedings{Sondermann-Wölke_Hemsel_Sextro_Gausemeier_Pook_2010, title={Guideline
for the dependability-oriented design of self-optimizing systems}, DOI={10.1109/INDIN.2010.5549490},
booktitle={Industrial Informatics (INDIN), 2010 8th IEEE International Conference
on}, author={Sondermann-Wölke, Christoph and Hemsel, Tobias and Sextro, Walter
and Gausemeier, Jürgen and Pook, Sebastian}, year={2010}, pages={739–744} }'
chicago: Sondermann-Wölke, Christoph, Tobias Hemsel, Walter Sextro, Jürgen Gausemeier,
and Sebastian Pook. “Guideline for the Dependability-Oriented Design of Self-Optimizing
Systems.” In Industrial Informatics (INDIN), 2010 8th IEEE International Conference
On, 739–44, 2010. https://doi.org/10.1109/INDIN.2010.5549490.
ieee: C. Sondermann-Wölke, T. Hemsel, W. Sextro, J. Gausemeier, and S. Pook, “Guideline
for the dependability-oriented design of self-optimizing systems,” in Industrial
Informatics (INDIN), 2010 8th IEEE International Conference on, 2010, pp.
739–744.
mla: Sondermann-Wölke, Christoph, et al. “Guideline for the Dependability-Oriented
Design of Self-Optimizing Systems.” Industrial Informatics (INDIN), 2010 8th
IEEE International Conference On, 2010, pp. 739–44, doi:10.1109/INDIN.2010.5549490.
short: 'C. Sondermann-Wölke, T. Hemsel, W. Sextro, J. Gausemeier, S. Pook, in: Industrial
Informatics (INDIN), 2010 8th IEEE International Conference On, 2010, pp. 739–744.'
date_created: 2019-05-13T10:25:26Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1109/INDIN.2010.5549490
keyword:
- RailCab
- dependability-critical behavior
- dependability-oriented design
- failure mode
- rail-bound vehicle
- secure self-optimizing systems
- self-optimizing function modules
- optimisation
- railways
- self-adjusting systems
language:
- iso: eng
page: 739 -744
publication: Industrial Informatics (INDIN), 2010 8th IEEE International Conference
on
quality_controlled: '1'
status: public
title: Guideline for the dependability-oriented design of self-optimizing systems
type: conference
user_id: '55222'
year: '2010'
...
---
_id: '9763'
abstract:
- lang: eng
text: Recent advances in information processing enable new kinds of technical systems,
called self-optimizing systems. These systems are able to adapt their objectives
and their behavior according to the current situation and influences autonomously.
This behavior adaptation is non-deterministic and hence self-optimization is a
risk to the system, e.g. if the result of the self-optimization process does not
match the suddenly changed situation. In contrary, self-optimization could be
used to increase the dependability by pursuing objectives like reliability and
availability. In our preceding publications we introduced the so called multi-level
dependability concept to cope with this new kind of systems (cf. [6]). This concept
comprises the monitoring of the system behavior, the classification of the current
situation, and the selection of the appropriate measure, if reliability limits
are exceeded. In this paper we present for the first time experimental results.
The dependability concept is implemented in the self-optimizing active guidance
system of a railway vehicle. The test drives illustrate clearly that the proposed
concept is able to cope with, e.g., sensor failures, and is able to increase the
reliability and availability of the active guidance module.
author:
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Jens
full_name: Geisler, Jens
last_name: Geisler
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Sondermann-Wölke C, Geisler J, Sextro W. Increasing the reliability of a self-optimizing
railway guidance system. In: Reliability and Maintainability Symposium (RAMS),
2010 Proceedings - Annual. ; 2010:1-6. doi:10.1109/RAMS.2010.5448080'
apa: Sondermann-Wölke, C., Geisler, J., & Sextro, W. (2010). Increasing the
reliability of a self-optimizing railway guidance system. In Reliability and
Maintainability Symposium (RAMS), 2010 Proceedings - Annual (pp. 1–6). https://doi.org/10.1109/RAMS.2010.5448080
bibtex: '@inproceedings{Sondermann-Wölke_Geisler_Sextro_2010, title={Increasing
the reliability of a self-optimizing railway guidance system}, DOI={10.1109/RAMS.2010.5448080},
booktitle={Reliability and Maintainability Symposium (RAMS), 2010 Proceedings
- Annual}, author={Sondermann-Wölke, Christoph and Geisler, Jens and Sextro, Walter},
year={2010}, pages={1–6} }'
chicago: Sondermann-Wölke, Christoph, Jens Geisler, and Walter Sextro. “Increasing
the Reliability of a Self-Optimizing Railway Guidance System.” In Reliability
and Maintainability Symposium (RAMS), 2010 Proceedings - Annual, 1–6, 2010.
https://doi.org/10.1109/RAMS.2010.5448080.
ieee: C. Sondermann-Wölke, J. Geisler, and W. Sextro, “Increasing the reliability
of a self-optimizing railway guidance system,” in Reliability and Maintainability
Symposium (RAMS), 2010 Proceedings - Annual, 2010, pp. 1–6.
mla: Sondermann-Wölke, Christoph, et al. “Increasing the Reliability of a Self-Optimizing
Railway Guidance System.” Reliability and Maintainability Symposium (RAMS),
2010 Proceedings - Annual, 2010, pp. 1–6, doi:10.1109/RAMS.2010.5448080.
short: 'C. Sondermann-Wölke, J. Geisler, W. Sextro, in: Reliability and Maintainability
Symposium (RAMS), 2010 Proceedings - Annual, 2010, pp. 1–6.'
date_created: 2019-05-13T10:35:39Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1109/RAMS.2010.5448080
keyword:
- availability
- dependability concept
- multilevel dependability concept
- railway vehicle
- reliability
- self optimizing active guidance system
- self optimizing railway guidance system
- situation classification
- system behavior monitoring
- optimal control
- railways
- reliability theory
- self-adjusting systems
language:
- iso: eng
page: 1 -6
publication: Reliability and Maintainability Symposium (RAMS), 2010 Proceedings -
Annual
publication_identifier:
issn:
- 0149-144X
quality_controlled: '1'
status: public
title: Increasing the reliability of a self-optimizing railway guidance system
type: conference
user_id: '55222'
year: '2010'
...
---
_id: '9736'
abstract:
- lang: eng
text: Self-optimizing mechatronic systems are a new class of technical systems.
On the one hand, new challenges regarding dependability arise from their additional
complexity and adaptivity. On the other hand, their abilities enable new concepts
and methods to improve the dependability of mechatronic systems. This paper introduces
a multi-level dependability concept for self-optimizing mechatronic systems and
shows how planning can be used to improve the availability and reliability of
systems in the operating stages.
author:
- first_name: Benjamin
full_name: Klöpper, Benjamin
last_name: Klöpper
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Christoph
full_name: Romaus, Christoph
last_name: Romaus
- first_name: Henner
full_name: Vöcking, Henner
last_name: Vöcking
citation:
ama: 'Klöpper B, Sondermann-Wölke C, Romaus C, Vöcking H. Probabilistic planning
integrated in a multi-level dependability concept for mechatronic systems. In:
Computational Intelligence in Control and Automation, 2009. CICA 2009. IEEE
Symposium On. ; 2009:104-111. doi:10.1109/CICA.2009.4982790'
apa: Klöpper, B., Sondermann-Wölke, C., Romaus, C., & Vöcking, H. (2009). Probabilistic
planning integrated in a multi-level dependability concept for mechatronic systems.
In Computational Intelligence in Control and Automation, 2009. CICA 2009. IEEE
Symposium on (pp. 104–111). https://doi.org/10.1109/CICA.2009.4982790
bibtex: '@inproceedings{Klöpper_Sondermann-Wölke_Romaus_Vöcking_2009, title={Probabilistic
planning integrated in a multi-level dependability concept for mechatronic systems},
DOI={10.1109/CICA.2009.4982790},
booktitle={Computational Intelligence in Control and Automation, 2009. CICA 2009.
IEEE Symposium on}, author={Klöpper, Benjamin and Sondermann-Wölke, Christoph
and Romaus, Christoph and Vöcking, Henner}, year={2009}, pages={104–111} }'
chicago: Klöpper, Benjamin, Christoph Sondermann-Wölke, Christoph Romaus, and Henner
Vöcking. “Probabilistic Planning Integrated in a Multi-Level Dependability Concept
for Mechatronic Systems.” In Computational Intelligence in Control and Automation,
2009. CICA 2009. IEEE Symposium On, 104–11, 2009. https://doi.org/10.1109/CICA.2009.4982790.
ieee: B. Klöpper, C. Sondermann-Wölke, C. Romaus, and H. Vöcking, “Probabilistic
planning integrated in a multi-level dependability concept for mechatronic systems,”
in Computational Intelligence in Control and Automation, 2009. CICA 2009. IEEE
Symposium on, 2009, pp. 104–111.
mla: Klöpper, Benjamin, et al. “Probabilistic Planning Integrated in a Multi-Level
Dependability Concept for Mechatronic Systems.” Computational Intelligence
in Control and Automation, 2009. CICA 2009. IEEE Symposium On, 2009, pp. 104–11,
doi:10.1109/CICA.2009.4982790.
short: 'B. Klöpper, C. Sondermann-Wölke, C. Romaus, H. Vöcking, in: Computational
Intelligence in Control and Automation, 2009. CICA 2009. IEEE Symposium On, 2009,
pp. 104–111.'
date_created: 2019-05-13T09:03:57Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1109/CICA.2009.4982790
keyword:
- multilevel dependability concept
- probabilistic planning
- self-optimizing mechatronic systems
- systems reliability
- mechatronics
- planning (artificial intelligence)
- self-adjusting systems
language:
- iso: eng
page: 104 -111
publication: Computational Intelligence in Control and Automation, 2009. CICA 2009.
IEEE Symposium on
quality_controlled: '1'
status: public
title: Probabilistic planning integrated in a multi-level dependability concept for
mechatronic systems
type: conference
user_id: '55222'
year: '2009'
...
---
_id: '9742'
abstract:
- lang: eng
text: New mechatronic systems, called self-optimizing systems, are able to adapt
their behavior according to environmental, user and system specific influences.
Self-optimizing systems are complex and due to their non-deterministic behavior
comprise hidden risks, which cannot be foreseen in the design phase of the system.
Therefore, this paper presents modifications of the current condition monitoring
policy, to be able to cope with this new kind of systems. Beside avoiding critical
situations evoked by self-optimization, the proposed concept uses self-optimization
to increase the dependability of the system. In this case, the concept is applied
to the active guidance module of an innovative rail-bound vehicle.
author:
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Sondermann-Wölke C, Sextro W. Towards the Integration of Condition Monitoring
in Self-Optimizing Function Modules. In: Future Computing, Service Computation,
Cognitive, Adaptive, Content, Patterns, 2009. COMPUTATIONWORLD ’09. Computation
World: ; 2009:15-20. doi:10.1109/ComputationWorld.2009.47'
apa: Sondermann-Wölke, C., & Sextro, W. (2009). Towards the Integration of Condition
Monitoring in Self-Optimizing Function Modules. In Future Computing, Service
Computation, Cognitive, Adaptive, Content, Patterns, 2009. COMPUTATIONWORLD ’09.
Computation World: (pp. 15–20). https://doi.org/10.1109/ComputationWorld.2009.47
bibtex: '@inproceedings{Sondermann-Wölke_Sextro_2009, title={Towards the Integration
of Condition Monitoring in Self-Optimizing Function Modules}, DOI={10.1109/ComputationWorld.2009.47},
booktitle={Future Computing, Service Computation, Cognitive, Adaptive, Content,
Patterns, 2009. COMPUTATIONWORLD ’09. Computation World:}, author={Sondermann-Wölke,
Christoph and Sextro, Walter}, year={2009}, pages={15–20} }'
chicago: Sondermann-Wölke, Christoph, and Walter Sextro. “Towards the Integration
of Condition Monitoring in Self-Optimizing Function Modules.” In Future Computing,
Service Computation, Cognitive, Adaptive, Content, Patterns, 2009. COMPUTATIONWORLD
’09. Computation World:, 15–20, 2009. https://doi.org/10.1109/ComputationWorld.2009.47.
ieee: C. Sondermann-Wölke and W. Sextro, “Towards the Integration of Condition Monitoring
in Self-Optimizing Function Modules,” in Future Computing, Service Computation,
Cognitive, Adaptive, Content, Patterns, 2009. COMPUTATIONWORLD ’09. Computation
World:, 2009, pp. 15–20.
mla: Sondermann-Wölke, Christoph, and Walter Sextro. “Towards the Integration of
Condition Monitoring in Self-Optimizing Function Modules.” Future Computing,
Service Computation, Cognitive, Adaptive, Content, Patterns, 2009. COMPUTATIONWORLD
’09. Computation World:, 2009, pp. 15–20, doi:10.1109/ComputationWorld.2009.47.
short: 'C. Sondermann-Wölke, W. Sextro, in: Future Computing, Service Computation,
Cognitive, Adaptive, Content, Patterns, 2009. COMPUTATIONWORLD ’09. Computation
World:, 2009, pp. 15–20.'
date_created: 2019-05-13T09:31:52Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '151'
doi: 10.1109/ComputationWorld.2009.47
keyword:
- condition monitoring
- mechatronic systems
- rail bound vehicle
- rail guidance module
- self-optimization
- self-optimizing function modules
- condition monitoring
- mechatronics
- railway rolling stock
- self-adjusting systems
language:
- iso: eng
page: 15 -20
publication: 'Future Computing, Service Computation, Cognitive, Adaptive, Content,
Patterns, 2009. COMPUTATIONWORLD ''09. Computation World:'
status: public
title: Towards the Integration of Condition Monitoring in Self-Optimizing Function
Modules
type: conference
user_id: '55222'
year: '2009'
...
---
_id: '11723'
abstract:
- lang: eng
text: In this paper we present a novel vehicle tracking algorithm, which is based
on multi-level sensor fusion of GPS (global positioning system) with Inertial
Measurement Unit sensor data. It is shown that the robustness of the system to
temporary dropouts of the GPS signal, which may occur due to limited visibility
of satellites in narrow street canyons or tunnels, is greatly improved by sensor
fusion. We further demonstrate how the observation and state noise covariances
of the employed Kalman filters can be estimated alongside the filtering by an
application of the Expectation-Maximization algorithm. The proposed time-variant
multi-level Kalman filter is shown to outperform an Interacting Multiple Model
approach while at the same time being computationally less demanding.
author:
- first_name: Maik
full_name: Bevermeier, Maik
last_name: Bevermeier
- first_name: Sven
full_name: Peschke, Sven
last_name: Peschke
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Bevermeier M, Peschke S, Haeb-Umbach R. Robust vehicle localization based
on multi-level sensor fusion and online parameter estimation. In: 6th Workshop
on Positioning Navigation and Communication (WPNC 2009). ; 2009:235-242. doi:10.1109/WPNC.2009.4907833'
apa: Bevermeier, M., Peschke, S., & Haeb-Umbach, R. (2009). Robust vehicle localization
based on multi-level sensor fusion and online parameter estimation. In 6th
Workshop on Positioning Navigation and Communication (WPNC 2009) (pp. 235–242).
https://doi.org/10.1109/WPNC.2009.4907833
bibtex: '@inproceedings{Bevermeier_Peschke_Haeb-Umbach_2009, title={Robust vehicle
localization based on multi-level sensor fusion and online parameter estimation},
DOI={10.1109/WPNC.2009.4907833},
booktitle={6th Workshop on Positioning Navigation and Communication (WPNC 2009)},
author={Bevermeier, Maik and Peschke, Sven and Haeb-Umbach, Reinhold}, year={2009},
pages={235–242} }'
chicago: Bevermeier, Maik, Sven Peschke, and Reinhold Haeb-Umbach. “Robust Vehicle
Localization Based on Multi-Level Sensor Fusion and Online Parameter Estimation.”
In 6th Workshop on Positioning Navigation and Communication (WPNC 2009),
235–42, 2009. https://doi.org/10.1109/WPNC.2009.4907833.
ieee: M. Bevermeier, S. Peschke, and R. Haeb-Umbach, “Robust vehicle localization
based on multi-level sensor fusion and online parameter estimation,” in 6th
Workshop on Positioning Navigation and Communication (WPNC 2009), 2009, pp.
235–242.
mla: Bevermeier, Maik, et al. “Robust Vehicle Localization Based on Multi-Level
Sensor Fusion and Online Parameter Estimation.” 6th Workshop on Positioning
Navigation and Communication (WPNC 2009), 2009, pp. 235–42, doi:10.1109/WPNC.2009.4907833.
short: 'M. Bevermeier, S. Peschke, R. Haeb-Umbach, in: 6th Workshop on Positioning
Navigation and Communication (WPNC 2009), 2009, pp. 235–242.'
date_created: 2019-07-12T05:27:01Z
date_updated: 2022-01-06T06:51:07Z
department:
- _id: '54'
doi: 10.1109/WPNC.2009.4907833
keyword:
- covariance matrices
- expectation-maximisation algorithm
- expectation-maximization algorithm
- global positioning system
- Global Positioning System
- GPS
- inertial measurement unit
- interacting multiple model approach
- Kalman filters
- multilevel sensor fusion
- narrow street canyons
- narrow tunnels
- online parameter estimation
- parameter estimation
- road vehicles
- robust vehicle localization
- sensor fusion
- state noise covariances
- time-variant multilevel Kalman filter
- vehicle tracking algorithm
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2009/BePeHa09.pdf
oa: '1'
page: 235-242
publication: 6th Workshop on Positioning Navigation and Communication (WPNC 2009)
status: public
title: Robust vehicle localization based on multi-level sensor fusion and online parameter
estimation
type: conference
user_id: '44006'
year: '2009'
...
---
_id: '11724'
abstract:
- lang: eng
text: In this paper we present a novel vehicle tracking method which is based on
multi-stage Kalman filtering of GPS and IMU sensor data. After individual Kalman
filtering of GPS and IMU measurements the estimates of the orientation of the
vehicle are combined in an optimal manner to improve the robustness towards drift
errors. The tracking algorithm incorporates the estimation of time-variant covariance
parameters by using an iterative block Expectation-Maximization algorithm to account
for time-variant driving conditions and measurement quality. The proposed system
is compared to an interacting multiple model approach (IMM) and achieves improved
localization accuracy at lower computational complexity. Furthermore we show how
the joint parameter estimation and localizaiton can be conducted with streaming
input data to be able to track vehicles in a real driving environment.
author:
- first_name: Maik
full_name: Bevermeier, Maik
last_name: Bevermeier
- first_name: Sven
full_name: Peschke, Sven
last_name: Peschke
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Bevermeier M, Peschke S, Haeb-Umbach R. Joint Parameter Estimation and Tracking
in a Multi-Stage Kalman Filter for Vehicle Positioning. In: IEEE 69th Vehicular
Technology Conference (VTC 2009 Spring). ; 2009:1-5. doi:10.1109/VETECS.2009.5073634'
apa: Bevermeier, M., Peschke, S., & Haeb-Umbach, R. (2009). Joint Parameter
Estimation and Tracking in a Multi-Stage Kalman Filter for Vehicle Positioning.
In IEEE 69th Vehicular Technology Conference (VTC 2009 Spring) (pp. 1–5).
https://doi.org/10.1109/VETECS.2009.5073634
bibtex: '@inproceedings{Bevermeier_Peschke_Haeb-Umbach_2009, title={Joint Parameter
Estimation and Tracking in a Multi-Stage Kalman Filter for Vehicle Positioning},
DOI={10.1109/VETECS.2009.5073634},
booktitle={IEEE 69th Vehicular Technology Conference (VTC 2009 Spring)}, author={Bevermeier,
Maik and Peschke, Sven and Haeb-Umbach, Reinhold}, year={2009}, pages={1–5} }'
chicago: Bevermeier, Maik, Sven Peschke, and Reinhold Haeb-Umbach. “Joint Parameter
Estimation and Tracking in a Multi-Stage Kalman Filter for Vehicle Positioning.”
In IEEE 69th Vehicular Technology Conference (VTC 2009 Spring), 1–5, 2009.
https://doi.org/10.1109/VETECS.2009.5073634.
ieee: M. Bevermeier, S. Peschke, and R. Haeb-Umbach, “Joint Parameter Estimation
and Tracking in a Multi-Stage Kalman Filter for Vehicle Positioning,” in IEEE
69th Vehicular Technology Conference (VTC 2009 Spring), 2009, pp. 1–5.
mla: Bevermeier, Maik, et al. “Joint Parameter Estimation and Tracking in a Multi-Stage
Kalman Filter for Vehicle Positioning.” IEEE 69th Vehicular Technology Conference
(VTC 2009 Spring), 2009, pp. 1–5, doi:10.1109/VETECS.2009.5073634.
short: 'M. Bevermeier, S. Peschke, R. Haeb-Umbach, in: IEEE 69th Vehicular Technology
Conference (VTC 2009 Spring), 2009, pp. 1–5.'
date_created: 2019-07-12T05:27:02Z
date_updated: 2022-01-06T06:51:07Z
department:
- _id: '54'
doi: 10.1109/VETECS.2009.5073634
keyword:
- computational complexity
- expectation-maximisation algorithm
- Global Positioning System
- inertial measurement unit
- inertial navigation
- interacting multiple model
- iterative block expectation-maximization algorithm
- Kalman filters
- multi-stage Kalman filter
- parameter estimation
- road vehicles
- vehicle positioning
- vehicle tracking
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2009/BePeHa09-1.pdf
oa: '1'
page: 1-5
publication: IEEE 69th Vehicular Technology Conference (VTC 2009 Spring)
status: public
title: Joint Parameter Estimation and Tracking in a Multi-Stage Kalman Filter for
Vehicle Positioning
type: conference
user_id: '44006'
year: '2009'
...
---
_id: '9576'
abstract:
- lang: eng
text: 'In neurosurgery, delineation of tumor boundaries during resection of brain
tumors is of substantial relevance. During operation distinction between tumor
and healthy tissue rely on the abilities of the surgeon based on visual and tactile
differentiation. In this paper a high sensitivity actuator-sensor system using
a piezoelectric bimorph is presented. Frequency shift and transfer function of
the bimorphpsilas voltages are detected and evaluated. Sensorpsilas sensitivity
is evaluated using two frequency controls strategies: A phase-locked loop (PLL)
and a self-oscillating circuit. Results of measurements conducted on gel-phantoms
are presented and discussed.'
author:
- first_name: David Oliva
full_name: Uribe, David Oliva
last_name: Uribe
- first_name: Ralf
full_name: Stroop, Ralf
last_name: Stroop
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Jörg
full_name: Wallaschek, Jörg
last_name: Wallaschek
citation:
ama: 'Uribe DO, Stroop R, Hemsel T, Wallaschek J. Development of a biomedical tissue
differentiation system using piezoelectric actuators. In: Frequency Control
Symposium, 2008 IEEE International. ; 2008:91-94. doi:10.1109/FREQ.2008.4622963'
apa: Uribe, D. O., Stroop, R., Hemsel, T., & Wallaschek, J. (2008). Development
of a biomedical tissue differentiation system using piezoelectric actuators. In
Frequency Control Symposium, 2008 IEEE International (pp. 91–94). https://doi.org/10.1109/FREQ.2008.4622963
bibtex: '@inproceedings{Uribe_Stroop_Hemsel_Wallaschek_2008, title={Development
of a biomedical tissue differentiation system using piezoelectric actuators},
DOI={10.1109/FREQ.2008.4622963},
booktitle={Frequency Control Symposium, 2008 IEEE International}, author={Uribe,
David Oliva and Stroop, Ralf and Hemsel, Tobias and Wallaschek, Jörg}, year={2008},
pages={91–94} }'
chicago: Uribe, David Oliva, Ralf Stroop, Tobias Hemsel, and Jörg Wallaschek. “Development
of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.”
In Frequency Control Symposium, 2008 IEEE International, 91–94, 2008. https://doi.org/10.1109/FREQ.2008.4622963.
ieee: D. O. Uribe, R. Stroop, T. Hemsel, and J. Wallaschek, “Development of a biomedical
tissue differentiation system using piezoelectric actuators,” in Frequency
Control Symposium, 2008 IEEE International, 2008, pp. 91–94.
mla: Uribe, David Oliva, et al. “Development of a Biomedical Tissue Differentiation
System Using Piezoelectric Actuators.” Frequency Control Symposium, 2008 IEEE
International, 2008, pp. 91–94, doi:10.1109/FREQ.2008.4622963.
short: 'D.O. Uribe, R. Stroop, T. Hemsel, J. Wallaschek, in: Frequency Control Symposium,
2008 IEEE International, 2008, pp. 91–94.'
date_created: 2019-04-29T13:07:39Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1109/FREQ.2008.4622963
keyword:
- biomedical measurement
- brain
- cancer
- neurophysiology
- phantoms
- phase locked loops
- piezoelectric actuators
- surgery
- tactile sensors
- transfer functions
- tumours
- PLL
- biomedical tissue differentiation system
- brain tumor resection
- frequency control
- frequency shift
- gel-phantom
- high sensitivity actuator-sensor system
- neurosurgery
- phase-locked loop
- piezoelectric actuators
- piezoelectric bimorph
- self-oscillating circuit
- sensor sensitivity
- tactile differentiation
- tactile sensor system
- transfer function
- tumor boundary
- visual differentiation
- Biomedical measurements
- Circuits
- Frequency control
- Neoplasms
- Neurosurgery
- Phase locked loops
- Piezoelectric actuators
- Surges
- Transfer functions
- Voltage
language:
- iso: eng
page: 91-94
publication: Frequency Control Symposium, 2008 IEEE International
publication_identifier:
issn:
- 1075-6787
quality_controlled: '1'
status: public
title: Development of a biomedical tissue differentiation system using piezoelectric
actuators
type: conference
user_id: '55222'
year: '2008'
...
---
_id: '11931'
abstract:
- lang: eng
text: The paper is concerned with binaural signal processing for a bimodal human-robot
interface with hearing and vision. The two microphone signals are processed to
obtain an enhanced single-channel input signal for the subsequent speech recognizer
and to localize the acoustic source, an important information for establishing
a natural human-robot communication. We utilize a robust adaptive algorithm for
filter-and-sum beamforming (FSB) and extract speaker direction information from
the resulting FIR filter coefficients. Further, particle filtering is applied
which conducts a nonlinear Bayesian tracking of speaker movement. Good location
accuracy can be achieved even in highly reverberant environments. The results
obtained outperform the conventional generalized cross correlation (GCC) method.
author:
- first_name: Ernst
full_name: Warsitz, Ernst
last_name: Warsitz
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Warsitz E, Haeb-Umbach R. Robust speaker direction estimation with particle
filtering. In: IEEE Workshop on Multimedia Signal Processing (MMSP 2004).
; 2004:367-370. doi:10.1109/MMSP.2004.1436569'
apa: Warsitz, E., & Haeb-Umbach, R. (2004). Robust speaker direction estimation
with particle filtering. In IEEE Workshop on Multimedia Signal Processing (MMSP
2004) (pp. 367–370). https://doi.org/10.1109/MMSP.2004.1436569
bibtex: '@inproceedings{Warsitz_Haeb-Umbach_2004, title={Robust speaker direction
estimation with particle filtering}, DOI={10.1109/MMSP.2004.1436569},
booktitle={IEEE Workshop on Multimedia Signal Processing (MMSP 2004)}, author={Warsitz,
Ernst and Haeb-Umbach, Reinhold}, year={2004}, pages={367–370} }'
chicago: Warsitz, Ernst, and Reinhold Haeb-Umbach. “Robust Speaker Direction Estimation
with Particle Filtering.” In IEEE Workshop on Multimedia Signal Processing
(MMSP 2004), 367–70, 2004. https://doi.org/10.1109/MMSP.2004.1436569.
ieee: E. Warsitz and R. Haeb-Umbach, “Robust speaker direction estimation with particle
filtering,” in IEEE Workshop on Multimedia Signal Processing (MMSP 2004),
2004, pp. 367–370.
mla: Warsitz, Ernst, and Reinhold Haeb-Umbach. “Robust Speaker Direction Estimation
with Particle Filtering.” IEEE Workshop on Multimedia Signal Processing (MMSP
2004), 2004, pp. 367–70, doi:10.1109/MMSP.2004.1436569.
short: 'E. Warsitz, R. Haeb-Umbach, in: IEEE Workshop on Multimedia Signal Processing
(MMSP 2004), 2004, pp. 367–370.'
date_created: 2019-07-12T05:31:01Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
doi: 10.1109/MMSP.2004.1436569
keyword:
- bimodal human-robot interface
- binaural signal processing
- enhanced single-channel input signal
- filter-and-sum beamforming
- filtering theory
- FIR filter coefficient
- generalized cross correlation method
- microphones
- microphone signal
- nonlinear Bayesian tracking
- particle filtering
- robust adaptive algorithm
- robust speaker direction estimation
- signal processing
- speech enhancement
- speech recognition
- speech recognizer
- user interfaces
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2004/WaHa04.pdf
oa: '1'
page: 367-370
publication: IEEE Workshop on Multimedia Signal Processing (MMSP 2004)
status: public
title: Robust speaker direction estimation with particle filtering
type: conference
user_id: '44006'
year: '2004'
...
---
_id: '39078'
author:
- first_name: Jürgen
full_name: Gausemeier, Jürgen
id: '163'
last_name: Gausemeier
- first_name: Wolfgang
full_name: Müller, Wolfgang
id: '16243'
last_name: Müller
- first_name: Volker
full_name: Paelke, Volker
last_name: Paelke
- first_name: Jürgen
full_name: Bauch, Jürgen
last_name: Bauch
- first_name: Q.
full_name: Shen, Q.
last_name: Shen
- first_name: 'R. '
full_name: 'Radkowski, R. '
last_name: Radkowski
citation:
ama: 'Gausemeier J, Müller W, Paelke V, Bauch J, Shen Q, Radkowski R. Virtual Prototyping
Of Self-Optimizing Mechatronic Systems. In: Proceedings of the Design 2004.
; 2004.'
apa: Gausemeier, J., Müller, W., Paelke, V., Bauch, J., Shen, Q., & Radkowski,
R. (2004). Virtual Prototyping Of Self-Optimizing Mechatronic Systems. Proceedings
of the Design 2004. 8th International Design Conference , Dubrovnik.
bibtex: '@inproceedings{Gausemeier_Müller_Paelke_Bauch_Shen_Radkowski_2004, place={Dubrovnik},
title={Virtual Prototyping Of Self-Optimizing Mechatronic Systems}, booktitle={Proceedings
of the Design 2004}, author={Gausemeier, Jürgen and Müller, Wolfgang and Paelke,
Volker and Bauch, Jürgen and Shen, Q. and Radkowski, R. }, year={2004} }'
chicago: Gausemeier, Jürgen, Wolfgang Müller, Volker Paelke, Jürgen Bauch, Q. Shen,
and R. Radkowski. “Virtual Prototyping Of Self-Optimizing Mechatronic Systems.”
In Proceedings of the Design 2004. Dubrovnik, 2004.
ieee: J. Gausemeier, W. Müller, V. Paelke, J. Bauch, Q. Shen, and R. Radkowski,
“Virtual Prototyping Of Self-Optimizing Mechatronic Systems,” presented at the
8th International Design Conference , Dubrovnik, 2004.
mla: Gausemeier, Jürgen, et al. “Virtual Prototyping Of Self-Optimizing Mechatronic
Systems.” Proceedings of the Design 2004, 2004.
short: 'J. Gausemeier, W. Müller, V. Paelke, J. Bauch, Q. Shen, R. Radkowski, in:
Proceedings of the Design 2004, Dubrovnik, 2004.'
conference:
location: Dubrovnik
name: '8th International Design Conference '
date_created: 2023-01-24T09:12:31Z
date_updated: 2023-01-24T09:12:40Z
department:
- _id: '672'
keyword:
- mechatronic systems
- self-optimization
- virtual prototyping
language:
- iso: eng
place: Dubrovnik
publication: Proceedings of the Design 2004
status: public
title: Virtual Prototyping Of Self-Optimizing Mechatronic Systems
type: conference
user_id: '5786'
year: '2004'
...