---
_id: '61014'
abstract:
- lang: eng
text: 'To obtain a more comprehensive understanding of the specific properties
of complex-shaped technical aerosols—such as partially sintered aggregates formed
in combustion processes or structured particles resulting from complex synthesis
processes—it is essential to measure more than a single equivalent size. This
study examines a novel method for determining a two-dimensional distribution of
two distinct particle properties within the size range from 50nm to 1000nm: the
Centrifugal Differential Mobility Analyzer (CDMA). The CDMA enables the simultaneous
measurement of both mobility and Stokes equivalent diameters, providing a detailed
two-dimensional particle property distribution. This, in turn, allows for the
extraction of shape-related information, which is essential for characterizing
particles in terms of their chemical composition, reactivity, and other physicochemical
properties. This paper presents a detailed evaluation of a first CDMA prototype.
First, CFD simulations of the flow field within the classifier are presented in
order to assess and understand non-idealities arising from the exact geometry.
Subsequently, the transfer function is evaluated by particle trajectory calculations
based on the simulated flow field. It can be demonstrated that the simulated transfer
functions agree quite well with transfer functions derived from streamlines of
an ideal flow field, indicating that the non-idealities in the classifying region
are almost negligible in their effect on the classification result. An experimental
determination of the transfer function shows additional effects not covered by
the previous simulations, like broadening by diffusion and losses due to diffusion
and precipitation within the in- and outlet of the classifier. Finally, the determined
transfer functions are used to determine the full two-dimensional distribution
with regard to the mobility and Stokes equivalent diameter of real aerosols, like
spherical particles and aggregates at different sintering stages, respectively.'
article_number: '11'
article_type: original
author:
- first_name: Torben Norbert
full_name: Rüther, Torben Norbert
last_name: Rüther
- first_name: Sebastian
full_name: Gröne, Sebastian
last_name: Gröne
- first_name: Christopher
full_name: Dechert, Christopher
last_name: Dechert
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
orcid: 000-0001-8590-1921
citation:
ama: Rüther TN, Gröne S, Dechert C, Schmid H-J. Centrifugal Differential Mobility
Analysis—Validation and First Two-Dimensional Measurements. Powders. 2025;4(2).
doi:10.3390/powders4020011
apa: Rüther, T. N., Gröne, S., Dechert, C., & Schmid, H.-J. (2025). Centrifugal
Differential Mobility Analysis—Validation and First Two-Dimensional Measurements.
Powders, 4(2), Article 11. https://doi.org/10.3390/powders4020011
bibtex: '@article{Rüther_Gröne_Dechert_Schmid_2025, title={Centrifugal Differential
Mobility Analysis—Validation and First Two-Dimensional Measurements}, volume={4},
DOI={10.3390/powders4020011},
number={211}, journal={Powders}, publisher={MDPI AG}, author={Rüther, Torben Norbert
and Gröne, Sebastian and Dechert, Christopher and Schmid, Hans-Joachim}, year={2025}
}'
chicago: Rüther, Torben Norbert, Sebastian Gröne, Christopher Dechert, and Hans-Joachim
Schmid. “Centrifugal Differential Mobility Analysis—Validation and First Two-Dimensional
Measurements.” Powders 4, no. 2 (2025). https://doi.org/10.3390/powders4020011.
ieee: 'T. N. Rüther, S. Gröne, C. Dechert, and H.-J. Schmid, “Centrifugal Differential
Mobility Analysis—Validation and First Two-Dimensional Measurements,” Powders,
vol. 4, no. 2, Art. no. 11, 2025, doi: 10.3390/powders4020011.'
mla: Rüther, Torben Norbert, et al. “Centrifugal Differential Mobility Analysis—Validation
and First Two-Dimensional Measurements.” Powders, vol. 4, no. 2, 11, MDPI
AG, 2025, doi:10.3390/powders4020011.
short: T.N. Rüther, S. Gröne, C. Dechert, H.-J. Schmid, Powders 4 (2025).
date_created: 2025-08-25T16:10:45Z
date_updated: 2025-08-25T16:15:41Z
doi: 10.3390/powders4020011
funded_apc: '1'
intvolume: ' 4'
issue: '2'
keyword:
- centrifugal differential mobility analysis
- 2D-measurement
- particle characterization
- moving reference frame CFD-simulation
- transfer function
language:
- iso: eng
publication: Powders
publication_identifier:
issn:
- 2674-0516
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Centrifugal Differential Mobility Analysis—Validation and First Two-Dimensional
Measurements
type: journal_article
user_id: '464'
volume: 4
year: '2025'
...
---
_id: '51133'
abstract:
- lang: eng
text: In order to standardize spray flame synthesis (SFS) studies, intensive work
has been done in recent years on the design of burner types. Thus, in 2019, the
so-called SpraySyn1 burner was introduced (SS1), which was subsequently characterized
in numerical and experimental studies. Based on this research, a modification
of the nozzle design was proposed, which has now been considered in the successor
model, SpraySyn2 (SS2). As little is known about the effect of the nozzle adaptation
on the particle formation, we operated both burners under identical operating
conditions to produce maghemite. The final powder comparison showed that SS2 yielded
considerable higher specific surface areas (associated with smaller primary particle
sizes), lower polydispersity, and higher phase purity. To obtain further information
on the size distributions of aggregates and agglomerates generated by SS2, aerosol
samples were extracted by hole in a tube (HIAT) sampling and characterized by
scanning mobility particle sizing (SMPS). Samples were extracted along the centerline
at different heights above the burner (HAB) above the visible flame tip (>7 cm),
and quenching experiments were performed to extract the aerosol samples at different
dilution rates. Thereby, it was demonstrated that performing detailed quenching
experiments is crucial for obtaining representative HIAT-SMPS data. In particular,
agglomerates/aggregate sizes were overestimated by up to ~70 % if samples were
not sufficiently diluted. If sufficient dilution was applied, distribution widths
and mean particle mobility diameters were determined with high accuracy (sample
standard derivation <5 %). Our data suggested the evolution of primary particle
sizes was mostly completed <7 cm HAB and it was shown aggregates/agglomerates
present above the visible flame were compact in structure (non- fractal). The
mean diameter of the particle ensemble grew along the centerline from 6.9 nm (7
cm) to 11.4 nm (15 cm), while distribution widths grew from 1.42 to 1.52.
citation:
ama: Tischendorf R, Massopo O, Schmid H-J, et al., eds. Maghemite Nanoparticles
Synthesis via Spray Flame Synthesis and Particle Characterization by Hole in a
Tube Sampling and Scanning Mobility Particle Sizing (HIAT-SMPS). Elsevier;
2024. doi:https://doi.org/10.1016/j.jaecs.2023.100235
apa: Maghemite nanoparticles synthesis via spray flame synthesis and particle characterization
by hole in a tube sampling and scanning mobility particle sizing (HIAT-SMPS).
(2024). In R. Tischendorf, O. Massopo, H.-J. Schmid, O. Pyrmak, S. Dupont, F.
Fröde, H. Pitsch, & R. Kneer (Eds.), Applications in Energy and Combustion
Science. Elsevier. https://doi.org/10.1016/j.jaecs.2023.100235
bibtex: '@book{Tischendorf_Massopo_Schmid_Pyrmak_Dupont_Fröde_Pitsch_Kneer_2024,
title={Maghemite nanoparticles synthesis via spray flame synthesis and particle
characterization by hole in a tube sampling and scanning mobility particle sizing
(HIAT-SMPS)}, DOI={https://doi.org/10.1016/j.jaecs.2023.100235},
journal={Applications in Energy and Combustion Science}, publisher={Elsevier},
year={2024} }'
chicago: Tischendorf, Ricardo, Orlando Massopo, Hans-Joachim Schmid, Olek Pyrmak,
Sophie Dupont, Fabian Fröde, Heinz Pitsch, and Reinhold Kneer, eds. Maghemite
Nanoparticles Synthesis via Spray Flame Synthesis and Particle Characterization
by Hole in a Tube Sampling and Scanning Mobility Particle Sizing (HIAT-SMPS).
Applications in Energy and Combustion Science. Elsevier, 2024. https://doi.org/10.1016/j.jaecs.2023.100235.
ieee: R. Tischendorf et al., Eds., Maghemite nanoparticles synthesis via
spray flame synthesis and particle characterization by hole in a tube sampling
and scanning mobility particle sizing (HIAT-SMPS). Elsevier, 2024.
mla: Tischendorf, Ricardo, et al., editors. “Maghemite Nanoparticles Synthesis via
Spray Flame Synthesis and Particle Characterization by Hole in a Tube Sampling
and Scanning Mobility Particle Sizing (HIAT-SMPS).” Applications in Energy
and Combustion Science, Elsevier, 2024, doi:https://doi.org/10.1016/j.jaecs.2023.100235.
short: R. Tischendorf, O. Massopo, H.-J. Schmid, O. Pyrmak, S. Dupont, F. Fröde,
H. Pitsch, R. Kneer, eds., Maghemite Nanoparticles Synthesis via Spray Flame Synthesis
and Particle Characterization by Hole in a Tube Sampling and Scanning Mobility
Particle Sizing (HIAT-SMPS), Elsevier, 2024.
date_created: 2024-02-05T12:02:57Z
date_updated: 2024-02-05T12:25:00Z
ddc:
- '660'
department:
- _id: '150'
doi: https://doi.org/10.1016/j.jaecs.2023.100235
editor:
- first_name: Ricardo
full_name: Tischendorf, Ricardo
id: '67002'
last_name: Tischendorf
- first_name: Orlando
full_name: Massopo, Orlando
id: '98419'
last_name: Massopo
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
orcid: 000-0001-8590-1921
- first_name: Olek
full_name: Pyrmak, Olek
last_name: Pyrmak
- first_name: Sophie
full_name: Dupont, Sophie
last_name: Dupont
- first_name: Fabian
full_name: Fröde, Fabian
last_name: Fröde
- first_name: Heinz
full_name: Pitsch, Heinz
last_name: Pitsch
- first_name: Reinhold
full_name: Kneer, Reinhold
last_name: Kneer
has_accepted_license: '1'
keyword:
- Flame Spray Pyrolysis
- SpraySyn2
- Spray flame synthesis
- Maghemite nanoparticles
- Gas to particle-conversion
- Hole in a tube sampling
language:
- iso: eng
main_file_link:
- url: https://www.sciencedirect.com/science/article/pii/S2666352X23001243?ref=cra_js_challenge&fr=RR-1
publication: Applications in Energy and Combustion Science
publication_status: published
publisher: Elsevier
status: public
title: Maghemite nanoparticles synthesis via spray flame synthesis and particle characterization
by hole in a tube sampling and scanning mobility particle sizing (HIAT-SMPS)
type: journal_editor
user_id: '98419'
year: '2024'
...
---
_id: '51145'
author:
- first_name: Orlando
full_name: Massopo, Orlando
id: '98419'
last_name: Massopo
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
orcid: 000-0001-8590-1921
- first_name: Munko
full_name: Gonchikzhapov, Munko
id: '94996'
last_name: Gonchikzhapov
orcid: https://orcid.org/0000-0002-7773-047X
- first_name: Tina
full_name: Kasper, Tina
id: '94562'
last_name: Kasper
orcid: '0000-0003-3993-5316 '
citation:
ama: 'Massopo O, Schmid H-J, Gonchikzhapov M, Kasper T. Nanoparticle Concentration
Measurement in Flame Spray Pyrolysis (Poster). In: ; 2023.'
apa: Massopo, O., Schmid, H.-J., Gonchikzhapov, M., & Kasper, T. (2023). Nanoparticle
Concentration Measurement in Flame Spray Pyrolysis (Poster). European Aerosol
Conference, Málaga, Spain .
bibtex: '@inproceedings{Massopo_Schmid_Gonchikzhapov_Kasper_2023, title={Nanoparticle
Concentration Measurement in Flame Spray Pyrolysis (Poster)}, author={Massopo,
Orlando and Schmid, Hans-Joachim and Gonchikzhapov, Munko and Kasper, Tina}, year={2023}
}'
chicago: Massopo, Orlando, Hans-Joachim Schmid, Munko Gonchikzhapov, and Tina Kasper.
“Nanoparticle Concentration Measurement in Flame Spray Pyrolysis (Poster),” 2023.
ieee: O. Massopo, H.-J. Schmid, M. Gonchikzhapov, and T. Kasper, “Nanoparticle Concentration
Measurement in Flame Spray Pyrolysis (Poster),” presented at the European Aerosol
Conference, Málaga, Spain , 2023.
mla: Massopo, Orlando, et al. Nanoparticle Concentration Measurement in Flame
Spray Pyrolysis (Poster). 2023.
short: 'O. Massopo, H.-J. Schmid, M. Gonchikzhapov, T. Kasper, in: 2023.'
conference:
end_date: 2023-09-08
location: 'Málaga, Spain '
name: European Aerosol Conference
start_date: 2023-09-03
date_created: 2024-02-05T12:45:55Z
date_updated: 2024-02-05T12:46:11Z
department:
- _id: '150'
- _id: '728'
keyword:
- Absolute particle concentration
- Flame Spray Pyrolysis
- SMPS
- Mass Spectrometry
language:
- iso: eng
status: public
title: Nanoparticle Concentration Measurement in Flame Spray Pyrolysis (Poster)
type: conference_abstract
user_id: '98419'
year: '2023'
...
---
_id: '51147'
author:
- first_name: Orlando
full_name: Massopo, Orlando
id: '98419'
last_name: Massopo
- first_name: Ricardo
full_name: Tischendorf, Ricardo
id: '67002'
last_name: Tischendorf
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
orcid: 000-0001-8590-1921
- first_name: Fabian
full_name: Fröde, Fabian
last_name: Fröde
- first_name: Temistocle
full_name: Grenga, Temistocle
last_name: Grenga
- first_name: Heinz
full_name: Pitsch, Heinz
last_name: Pitsch
- first_name: Malte
full_name: Bieber, Malte
last_name: Bieber
- first_name: Manuel
full_name: Reddemann, Manuel
last_name: Reddemann
- first_name: Reinhold
full_name: Kneer, Reinhold
last_name: Kneer
citation:
ama: 'Massopo O, Tischendorf R, Schmid H-J, et al. Influence of atomization on the
particle formation in spray flame pyrolysis (Presentation). In: International
Congress of Particle Technology; 2023.'
apa: Massopo, O., Tischendorf, R., Schmid, H.-J., Fröde, F., Grenga, T., Pitsch,
H., Bieber, M., Reddemann, M., & Kneer, R. (2023). Influence of atomization
on the particle formation in spray flame pyrolysis (Presentation). International
Congress of Particle Technology, Nürnberg.
bibtex: '@inproceedings{Massopo_Tischendorf_Schmid_Fröde_Grenga_Pitsch_Bieber_Reddemann_Kneer_2023,
place={Nürnberg}, title={Influence of atomization on the particle formation in
spray flame pyrolysis (Presentation)}, publisher={International Congress of Particle
Technology}, author={Massopo, Orlando and Tischendorf, Ricardo and Schmid, Hans-Joachim
and Fröde, Fabian and Grenga, Temistocle and Pitsch, Heinz and Bieber, Malte and
Reddemann, Manuel and Kneer, Reinhold}, year={2023} }'
chicago: 'Massopo, Orlando, Ricardo Tischendorf, Hans-Joachim Schmid, Fabian Fröde,
Temistocle Grenga, Heinz Pitsch, Malte Bieber, Manuel Reddemann, and Reinhold
Kneer. “Influence of Atomization on the Particle Formation in Spray Flame Pyrolysis
(Presentation).” Nürnberg: International Congress of Particle Technology, 2023.'
ieee: O. Massopo et al., “Influence of atomization on the particle formation
in spray flame pyrolysis (Presentation),” presented at the International Congress
of Particle Technology, Nürnberg, 2023.
mla: Massopo, Orlando, et al. Influence of Atomization on the Particle Formation
in Spray Flame Pyrolysis (Presentation). International Congress of Particle
Technology, 2023.
short: 'O. Massopo, R. Tischendorf, H.-J. Schmid, F. Fröde, T. Grenga, H. Pitsch,
M. Bieber, M. Reddemann, R. Kneer, in: International Congress of Particle Technology,
Nürnberg, 2023.'
conference:
end_date: 2023-09-28
location: Nürnberg
name: International Congress of Particle Technology
start_date: 2023-09-26
date_created: 2024-02-05T12:59:39Z
date_updated: 2025-09-18T10:49:39Z
department:
- _id: '150'
keyword:
- Flame Stability
- Particle Sample Extraction
- SMPS
- Impurities
language:
- iso: eng
place: Nürnberg
publisher: International Congress of Particle Technology
status: public
title: Influence of atomization on the particle formation in spray flame pyrolysis
(Presentation)
type: conference_abstract
user_id: '98419'
year: '2023'
...
---
_id: '51142'
author:
- first_name: Orlando
full_name: Massopo, Orlando
id: '98419'
last_name: Massopo
- first_name: Ricardo
full_name: Tischendorf, Ricardo
id: '67002'
last_name: Tischendorf
- first_name: Hans-Joachim
full_name: Schmid, Hans-Joachim
id: '464'
last_name: Schmid
orcid: 000-0001-8590-1921
- first_name: Fabian
full_name: Fröde, Fabian
last_name: Fröde
- first_name: Heinz
full_name: Pitsch, Heinz
last_name: Pitsch
- first_name: Manuel
full_name: Reddemann, Manuel
last_name: Reddemann
- first_name: Temistocle
full_name: Grenga, Temistocle
last_name: Grenga
- first_name: Reinhold
full_name: Kneer, Reinhold
last_name: Kneer
citation:
ama: 'Massopo O, Tischendorf R, Schmid H-J, et al. Einfluss der Zerstäubung auf
diePartikelbildung bei der Sprayflammenpyrolyse (Vortrag). In: Jahrestreffen der
DECHEMA-Fachgruppen Aerosoltechnik, Gasreinigung, Mehrphasenströmung und Partikelmesstechnik;
2023.'
apa: Massopo, O., Tischendorf, R., Schmid, H.-J., Fröde, F., Pitsch, H., Reddemann,
M., Grenga, T., & Kneer, R. (2023). Einfluss der Zerstäubung auf diePartikelbildung
bei der Sprayflammenpyrolyse (Vortrag). Jahrestreffen der DECHEMA-Fachgruppen
Aerosoltechnik, Gasreinigung, Mehrphasenströmung und Partikelmesstechnik, Paderborn.
bibtex: '@inproceedings{Massopo_Tischendorf_Schmid_Fröde_Pitsch_Reddemann_Grenga_Kneer_2023,
place={Paderborn}, title={Einfluss der Zerstäubung auf diePartikelbildung bei
der Sprayflammenpyrolyse (Vortrag)}, publisher={Jahrestreffen der DECHEMA-Fachgruppen
Aerosoltechnik, Gasreinigung, Mehrphasenströmung und Partikelmesstechnik}, author={Massopo,
Orlando and Tischendorf, Ricardo and Schmid, Hans-Joachim and Fröde, Fabian and
Pitsch, Heinz and Reddemann, Manuel and Grenga, Temistocle and Kneer, Reinhold},
year={2023} }'
chicago: 'Massopo, Orlando, Ricardo Tischendorf, Hans-Joachim Schmid, Fabian Fröde,
Heinz Pitsch, Manuel Reddemann, Temistocle Grenga, and Reinhold Kneer. “Einfluss
Der Zerstäubung Auf DiePartikelbildung Bei Der Sprayflammenpyrolyse (Vortrag).”
Paderborn: Jahrestreffen der DECHEMA-Fachgruppen Aerosoltechnik, Gasreinigung,
Mehrphasenströmung und Partikelmesstechnik, 2023.'
ieee: O. Massopo et al., “Einfluss der Zerstäubung auf diePartikelbildung
bei der Sprayflammenpyrolyse (Vortrag),” presented at the Jahrestreffen der DECHEMA-Fachgruppen
Aerosoltechnik, Gasreinigung, Mehrphasenströmung und Partikelmesstechnik, Paderborn,
2023.
mla: Massopo, Orlando, et al. Einfluss Der Zerstäubung Auf DiePartikelbildung
Bei Der Sprayflammenpyrolyse (Vortrag). Jahrestreffen der DECHEMA-Fachgruppen
Aerosoltechnik, Gasreinigung, Mehrphasenströmung und Partikelmesstechnik, 2023.
short: 'O. Massopo, R. Tischendorf, H.-J. Schmid, F. Fröde, H. Pitsch, M. Reddemann,
T. Grenga, R. Kneer, in: Jahrestreffen der DECHEMA-Fachgruppen Aerosoltechnik,
Gasreinigung, Mehrphasenströmung und Partikelmesstechnik, Paderborn, 2023.'
conference:
end_date: 2023-03-30
location: Paderborn
name: Jahrestreffen der DECHEMA-Fachgruppen Aerosoltechnik, Gasreinigung, Mehrphasenströmung
und Partikelmesstechnik
start_date: 2023-03-28
date_created: 2024-02-05T12:37:04Z
date_updated: 2025-09-18T11:16:36Z
department:
- _id: '150'
keyword:
- SpraySyn
- Flammenspraypyrolyse
- Maghemite Nanopartikel
- Gas to particle-Syntheseweg
- Probennahme
- Verunreinigung
language:
- iso: eng
place: Paderborn
publisher: Jahrestreffen der DECHEMA-Fachgruppen Aerosoltechnik, Gasreinigung, Mehrphasenströmung
und Partikelmesstechnik
status: public
title: Einfluss der Zerstäubung auf diePartikelbildung bei der Sprayflammenpyrolyse
(Vortrag)
type: conference_abstract
user_id: '98419'
year: '2023'
...
---
_id: '25046'
abstract:
- lang: eng
text: While increasing digitalization enables multiple advantages for a
reliable operation of technical systems, a remaining challenge in the context
of condition monitoring is seen in suitable consideration of uncertainties affecting
the monitored system. Therefore, a suitable prognostic approach to predict the
remaining useful lifetime of complex technical systems is required. To handle
different kinds of uncertainties, a novel Multi-Model-Particle Filtering-based
prognostic approach is developed and evaluated by the use case of rubber-metal-elements.
These elements are maintained preventively due to the strong influence of uncertainties
on their behavior. In this paper, two measurement quantities are compared concerning
their ability to establish a prediction of the remaining useful lifetime of the
monitored elements and the influence of present uncertainties. Based on three
performance indices, the results are evaluated. A comparison with predictions
of a classical Particle Filter underlines the superiority of the developed Multi-Model-Particle
Filter. Finally, the value of the developed method for enabling condition monitoring
of technical systems related to uncertainties is given exemplary by a comparison
between the preventive and the predictive maintenance strategy for the use case.
article_number: '210'
article_type: original
author:
- first_name: Amelie
full_name: Bender, Amelie
id: '54290'
last_name: Bender
citation:
ama: Bender A. A Multi-Model-Particle Filtering-Based Prognostic Approach to Consider
Uncertainties in RUL Predictions. Machines. 2021;9(10). doi:10.3390/machines9100210
apa: Bender, A. (2021). A Multi-Model-Particle Filtering-Based Prognostic Approach
to Consider Uncertainties in RUL Predictions. Machines, 9(10), Article
210. https://doi.org/10.3390/machines9100210
bibtex: '@article{Bender_2021, title={A Multi-Model-Particle Filtering-Based Prognostic
Approach to Consider Uncertainties in RUL Predictions}, volume={9}, DOI={10.3390/machines9100210},
number={10210}, journal={Machines}, author={Bender, Amelie}, year={2021} }'
chicago: Bender, Amelie. “A Multi-Model-Particle Filtering-Based Prognostic Approach
to Consider Uncertainties in RUL Predictions.” Machines 9, no. 10 (2021).
https://doi.org/10.3390/machines9100210.
ieee: 'A. Bender, “A Multi-Model-Particle Filtering-Based Prognostic Approach to
Consider Uncertainties in RUL Predictions,” Machines, vol. 9, no. 10, Art.
no. 210, 2021, doi: 10.3390/machines9100210.'
mla: Bender, Amelie. “A Multi-Model-Particle Filtering-Based Prognostic Approach
to Consider Uncertainties in RUL Predictions.” Machines, vol. 9, no. 10,
210, 2021, doi:10.3390/machines9100210.
short: A. Bender, Machines 9 (2021).
date_created: 2021-09-27T07:07:58Z
date_updated: 2022-11-03T11:42:46Z
department:
- _id: '151'
doi: 10.3390/machines9100210
intvolume: ' 9'
issue: '10'
keyword:
- prognostics
- RUL predictions
- particle filter
- uncertainty consideration
- Multi-Model-Particle Filter
- model-based approach
- rubber-metal-elements
- predictive maintenance
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2075-1702/9/10/210
oa: '1'
publication: Machines
publication_identifier:
issn:
- 2075-1702
publication_status: published
quality_controlled: '1'
status: public
title: A Multi-Model-Particle Filtering-Based Prognostic Approach to Consider Uncertainties
in RUL Predictions
type: journal_article
user_id: '54290'
volume: 9
year: '2021'
...
---
_id: '22724'
abstract:
- lang: eng
text: "\r\nPredictive Maintenance as a desirable maintenance strategy in industrial
applications relies on suitable condition monitoring solutions to reduce costs
and risks of the monitored technical systems. In general, those solutions utilize
model-based or data-driven methods to diagnose the current state or predict future
states of monitored technical systems. However, both methods have their advantages
and drawbacks. Combining both methods can improve uncertainty consideration and
accuracy. Different combination approaches of those hybrid methods exist to exploit
synergy effects. The choice of an appropriate approach depends on different requirements
and the goal behind the selection of a hybrid approach.\r\n\r\n \r\n\r\nIn this
work, the hybrid approach for estimating remaining useful lifetime takes potential
uncertainties into account. Therefore, a data-driven estimation of new measurements
is integrated within a model-based method. To consider uncertainties within the
system, a differentiation between different system behavior is realized throughout
diverse states of degradation.\r\n\r\nThe developed hybrid prediction approach
bases on a particle filtering method combined with a machine learning method,
to estimate the remaining useful lifetime of technical systems. Particle filtering
as a Monte Carlo simulation technique is suitable to map and propagate uncertainties.
Moreover, it is a state-of-the-art model-based method for predicting remaining
useful lifetime of technical systems. To integrate uncertainties a multi-model
particle filtering approach is employed. In general, resampling as a part of the
particle filtering approach has the potential to lead to an accurate prediction.
However, in the case where no future measurements are available, it may increase
the uncertainty of the prediction. By estimating new measurements, those uncertainties
are reduced within the data-driven part of the approach. Hence, both parts of
the hybrid approach strive to account for and reduce uncertainties.\r\n\r\n \r\n\r\nRubber-metal-elements
are employed as a use-case to evaluate the developed approach. Rubber-metal-elements,
which are used to isolate vibrations in various systems, such as railways, trucks
and wind turbines, show various uncertainties in their behavior and their degradation.
Those uncertainties are caused by diverse inner and outer factors, such as manufacturing
influences and operating conditions. By expert knowledge the influences are described,
analyzed and if possible reduced. However, the remaining uncertainties are considered
within the hybrid prediction method. Relative temperature is the selected measurand
to describe the element’s degradation. In lifetime tests, it is measured as the
difference between the element’s temperature and the ambient temperature. Thereby,
the influence of the ambient temperature on the element’s temperature is taken
into account. Those elements show three typical states of degradation that are
identified within the temperature measurements. Depending on the particular state
of degradation a new measurement is estimated within the hybrid approach to reduce
potential uncertainties.\r\n\r\nFinally, the performance of the developed hybrid
method is compared to a model-based method for estimating the remaining useful
lifetime of the same elements. Suitable performance indices are implemented to
underline the differences between the results."
author:
- first_name: Amelie
full_name: Bender, Amelie
id: '54290'
last_name: Bender
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Bender A, Sextro W. Hybrid Prediction Method for Remaining Useful Lifetime
Estimation Considering Uncertainties. In: Do P, King S, Fink Olga, eds. Proceedings
of the European Conference of the PHM Society 2021. Vol 6. ; 2021. doi:https://doi.org/10.36001/phme.2021.v6i1.2843
'
apa: Bender, A., & Sextro, W. (2021). Hybrid Prediction Method for Remaining
Useful Lifetime Estimation Considering Uncertainties. In P. Do, S. King, & Olga
Fink (Eds.), Proceedings of the European Conference of the PHM Society 2021
(Vol. 6, Issue 1). https://doi.org/10.36001/phme.2021.v6i1.2843
bibtex: '@inproceedings{Bender_Sextro_2021, title={Hybrid Prediction Method for
Remaining Useful Lifetime Estimation Considering Uncertainties}, volume={6}, DOI={https://doi.org/10.36001/phme.2021.v6i1.2843
}, number={1}, booktitle={Proceedings of the European Conference of the PHM
Society 2021}, author={Bender, Amelie and Sextro, Walter}, editor={Do, Phuc and
King, Steve and Fink, Olga}, year={2021} }'
chicago: Bender, Amelie, and Walter Sextro. “Hybrid Prediction Method for Remaining
Useful Lifetime Estimation Considering Uncertainties.” In Proceedings of the
European Conference of the PHM Society 2021, edited by Phuc Do, Steve King,
and Olga Fink, Vol. 6, 2021. https://doi.org/10.36001/phme.2021.v6i1.2843 .
ieee: 'A. Bender and W. Sextro, “Hybrid Prediction Method for Remaining Useful Lifetime
Estimation Considering Uncertainties,” in Proceedings of the European Conference
of the PHM Society 2021, 2021, vol. 6, no. 1, doi: https://doi.org/10.36001/phme.2021.v6i1.2843 .'
mla: Bender, Amelie, and Walter Sextro. “Hybrid Prediction Method for Remaining
Useful Lifetime Estimation Considering Uncertainties.” Proceedings of the European
Conference of the PHM Society 2021, edited by Phuc Do et al., vol. 6, no.
1, 2021, doi:https://doi.org/10.36001/phme.2021.v6i1.2843
.
short: 'A. Bender, W. Sextro, in: P. Do, S. King, Olga Fink (Eds.), Proceedings
of the European Conference of the PHM Society 2021, 2021.'
conference:
end_date: 2021-07-02
name: 6th European Conference of Prognostics and Health Management
start_date: 2021-06-28
date_created: 2021-07-14T06:29:08Z
date_updated: 2023-09-22T07:19:48Z
department:
- _id: '151'
doi: 'https://doi.org/10.36001/phme.2021.v6i1.2843 '
editor:
- first_name: 'Phuc '
full_name: 'Do, Phuc '
last_name: Do
- first_name: Steve
full_name: King, Steve
last_name: King
- first_name: ' Olga'
full_name: Fink, Olga
last_name: Fink
intvolume: ' 6'
issue: '1'
keyword:
- Hybrid prediction method
- Multi-model particle filtering
- Uncertainty quantification
- RUL estimation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://papers.phmsociety.org/index.php/phme/article/view/2843
oa: '1'
publication: Proceedings of the European Conference of the PHM Society 2021
publication_identifier:
unknown:
- 978-1-936263-34-9
publication_status: published
quality_controlled: '1'
status: public
title: Hybrid Prediction Method for Remaining Useful Lifetime Estimation Considering
Uncertainties
type: conference
user_id: '54290'
volume: 6
year: '2021'
...
---
_id: '64018'
abstract:
- lang: eng
text: CO oxidation is an extensively studied reaction in heterogeneous catalysis
due to its seeming simplicity and its great importance for emission control. However,
the role of particle size and more specifically structure sensitivity in this
reaction is still controversial. In the present study, colloidal “surfactant-free”
Pt nanoparticles (NPs) in a size regime of 1–4 nm with narrow size distribution
and control over particle size were synthesized and subsequently supported on
Al2O3 to prepare model catalysts. CO oxidation was performed using Pt NPs catalysts
with particles sizes of 1, 2, 3, and 4 nm at different reaction temperatures.
It is shown that the reaction exhibits a particle size effect that depends strongly
on the reaction conditions. At 170 °C, the reaction seems to proceed within the
same kinetic regime for all particle sizes, but the surface normalized activity
depends strongly on the particle size, with maximum activity for nanoparticles
2 nm in diameter. A temperature increase to 200 °C leads to a change of the kinetic
regime that depends on the particle size. For Pt NPs 1 nm in diameter a reaction
order of 1 for O2 was observed, indicating that O2 adsorbs molecularly and dissociates
in a following step, which represents the generally accepted mechanism on Pt surfaces.
The reaction order of −1 for CO demonstrates that the surface is saturated with
CO under reaction conditions. With increasing particle size, the reaction orders
of O2 and CO change. For particles 2 nm in size, an increase in temperature also
results in reaction orders of 1 for O2 and −1 for CO; NPs of 3 and 4 nm, even
at higher temperatures, show no clear kinetic behavior that can be explained by
a single reaction mechanism. Instead, the Boudouard reaction between two adjacent
adsorbed CO molecules was identified as an important additional reaction pathway
that occurs preferentially on large particles and causes more complex kinetics.
author:
- first_name: Sarah
full_name: Neumann, Sarah
last_name: Neumann
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Stephen
full_name: Paul, Stephen
last_name: Paul
- first_name: Greg
full_name: Thiele, Greg
last_name: Thiele
- first_name: Heiko
full_name: Sievers, Heiko
last_name: Sievers
- first_name: Marcus
full_name: Bäumer, Marcus
last_name: Bäumer
- first_name: Sebastian
full_name: Kunz, Sebastian
last_name: Kunz
citation:
ama: Neumann S, Gutmann T, Buntkowsky G, et al. Insights into the reaction mechanism
and particle size effects of CO oxidation over supported Pt nanoparticle catalysts.
Journal of Catalysis. 2019;377:662–672. doi:10.1016/j.jcat.2019.07.049
apa: Neumann, S., Gutmann, T., Buntkowsky, G., Paul, S., Thiele, G., Sievers, H.,
Bäumer, M., & Kunz, S. (2019). Insights into the reaction mechanism and particle
size effects of CO oxidation over supported Pt nanoparticle catalysts. Journal
of Catalysis, 377, 662–672. https://doi.org/10.1016/j.jcat.2019.07.049
bibtex: '@article{Neumann_Gutmann_Buntkowsky_Paul_Thiele_Sievers_Bäumer_Kunz_2019,
title={Insights into the reaction mechanism and particle size effects of CO oxidation
over supported Pt nanoparticle catalysts}, volume={377}, DOI={10.1016/j.jcat.2019.07.049},
journal={Journal of Catalysis}, author={Neumann, Sarah and Gutmann, Torsten and
Buntkowsky, Gerd and Paul, Stephen and Thiele, Greg and Sievers, Heiko and Bäumer,
Marcus and Kunz, Sebastian}, year={2019}, pages={662–672} }'
chicago: 'Neumann, Sarah, Torsten Gutmann, Gerd Buntkowsky, Stephen Paul, Greg Thiele,
Heiko Sievers, Marcus Bäumer, and Sebastian Kunz. “Insights into the Reaction
Mechanism and Particle Size Effects of CO Oxidation over Supported Pt Nanoparticle
Catalysts.” Journal of Catalysis 377 (2019): 662–672. https://doi.org/10.1016/j.jcat.2019.07.049.'
ieee: 'S. Neumann et al., “Insights into the reaction mechanism and particle
size effects of CO oxidation over supported Pt nanoparticle catalysts,” Journal
of Catalysis, vol. 377, pp. 662–672, 2019, doi: 10.1016/j.jcat.2019.07.049.'
mla: Neumann, Sarah, et al. “Insights into the Reaction Mechanism and Particle Size
Effects of CO Oxidation over Supported Pt Nanoparticle Catalysts.” Journal
of Catalysis, vol. 377, 2019, pp. 662–672, doi:10.1016/j.jcat.2019.07.049.
short: S. Neumann, T. Gutmann, G. Buntkowsky, S. Paul, G. Thiele, H. Sievers, M.
Bäumer, S. Kunz, Journal of Catalysis 377 (2019) 662–672.
date_created: 2026-02-07T16:02:06Z
date_updated: 2026-02-17T16:14:45Z
doi: 10.1016/j.jcat.2019.07.049
extern: '1'
intvolume: ' 377'
keyword:
- Solid state NMR
- “Surfactant-free” platinum nanoparticles
- CO oxidation
- Particle size effect
- Structure sensitivity
language:
- iso: eng
page: 662–672
publication: Journal of Catalysis
status: public
title: Insights into the reaction mechanism and particle size effects of CO oxidation
over supported Pt nanoparticle catalysts
type: journal_article
user_id: '100715'
volume: 377
year: '2019'
...
---
_id: '63991'
abstract:
- lang: eng
text: A series of 1 and 2 nm sized platinum nanoparticles (Pt-NPs) deposited on
different support materials, namely, gamma-alumina (gamma-Al2O3), titanium dioxide
(TiO2), silicon dioxide (SiO2) and fumed silica are investigated by solid-state
NMR and dynamic nuclear polarization enhanced NMR spectroscopy (DNP). DNP signal
enhancement factors up to 170 enable gaining deeper insight into the surface chemistry
of Pt-NPs. Carbon monoxide is used as a probe molecule to analyze the adsorption
process and the surface chemistry on the supported Pt-NPs. The studied systems
show significant catalytic activity in carbon monoxide oxidation on their surface
at room temperature. The underlying catalytic mechanism is the water-gas shift
reaction. In the case of alumina as the support the produced CO2 reacts with the
surface to form carbonate, which is revealed by solid-state NMR. A similar carbonate
formation is also observed when physical mixtures of neat alumina with silica,
fumed silica and titania supported Pt-NPs are studied.
author:
- first_name: V.
full_name: Klimavicius, V.
last_name: Klimavicius
- first_name: S.
full_name: Neumann, S.
last_name: Neumann
- first_name: S.
full_name: Kunz, S.
last_name: Kunz
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: G.
full_name: Buntkowsky, G.
last_name: Buntkowsky
citation:
ama: Klimavicius V, Neumann S, Kunz S, Gutmann T, Buntkowsky G. Room temperature
CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state NMR
and DNP spectroscopy. Catalysis Science & Technology. 2019;9(14):3743–3752.
doi:10.1039/c9cy00684b
apa: Klimavicius, V., Neumann, S., Kunz, S., Gutmann, T., & Buntkowsky, G. (2019).
Room temperature CO oxidation catalysed by supported Pt nanoparticles revealed
by solid-state NMR and DNP spectroscopy. Catalysis Science & Technology,
9(14), 3743–3752. https://doi.org/10.1039/c9cy00684b
bibtex: '@article{Klimavicius_Neumann_Kunz_Gutmann_Buntkowsky_2019, title={Room
temperature CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state
NMR and DNP spectroscopy}, volume={9}, DOI={10.1039/c9cy00684b},
number={14}, journal={Catalysis Science & Technology}, author={Klimavicius,
V. and Neumann, S. and Kunz, S. and Gutmann, Torsten and Buntkowsky, G.}, year={2019},
pages={3743–3752} }'
chicago: 'Klimavicius, V., S. Neumann, S. Kunz, Torsten Gutmann, and G. Buntkowsky.
“Room Temperature CO Oxidation Catalysed by Supported Pt Nanoparticles Revealed
by Solid-State NMR and DNP Spectroscopy.” Catalysis Science & Technology
9, no. 14 (2019): 3743–3752. https://doi.org/10.1039/c9cy00684b.'
ieee: 'V. Klimavicius, S. Neumann, S. Kunz, T. Gutmann, and G. Buntkowsky, “Room
temperature CO oxidation catalysed by supported Pt nanoparticles revealed by solid-state
NMR and DNP spectroscopy,” Catalysis Science & Technology, vol. 9,
no. 14, pp. 3743–3752, 2019, doi: 10.1039/c9cy00684b.'
mla: Klimavicius, V., et al. “Room Temperature CO Oxidation Catalysed by Supported
Pt Nanoparticles Revealed by Solid-State NMR and DNP Spectroscopy.” Catalysis
Science & Technology, vol. 9, no. 14, 2019, pp. 3743–3752, doi:10.1039/c9cy00684b.
short: V. Klimavicius, S. Neumann, S. Kunz, T. Gutmann, G. Buntkowsky, Catalysis
Science & Technology 9 (2019) 3743–3752.
date_created: 2026-02-07T15:47:21Z
date_updated: 2026-02-17T16:16:33Z
doi: 10.1039/c9cy00684b
extern: '1'
intvolume: ' 9'
issue: '14'
keyword:
- Chemistry
- gamma-alumina
- hydrogenation
- silica
- c-13
- interactions
- metal-catalysts
- particle-size
- platinum nanoparticles
- sites
- surface
- water-gas shift
language:
- iso: eng
page: 3743–3752
publication: Catalysis Science & Technology
publication_identifier:
issn:
- 2044-4753
status: public
title: Room temperature CO oxidation catalysed by supported Pt nanoparticles revealed
by solid-state NMR and DNP spectroscopy
type: journal_article
user_id: '100715'
volume: 9
year: '2019'
...
---
_id: '64054'
abstract:
- lang: eng
text: In this work, the preparation of porous hybrid particle-based films by core-shell
particle design and convenient film preparation is reported. Monodisperse core
particles consisting of poly(methyl methacrylate‑co‑allyl methacrylate) (P(MMA‑co‑ALMA))
were synthesized by starved-feed emulsion polymerization followed by the introduction
of an initiator-containing monomer (inimer) for subsequent atom transfer radical
polymerization (ATRP). The inimer shell allowed for the introduction of allylhydrido
polycarbosilane (SMP-10) under ATRP conditions by grafting to the core particles.
The functionalization of the prepared core-shell particles was investigated by
IR spectroscopy (FTIR), scanning transmission electron microscopy (STEM) and solid-state
NMR combined with dynamic nuclear polarization (DNP). The obtained hard core/soft
preceramic shell particles were subjected to the melt-shear organization technique,
enabling a convenient alignment into a colloidal crystal structure in one single
step without the presence of a dispersion medium or solvent for the designed particles.
Moreover, the hybrid particle-based films were converted into a porous ceramic
structure upon thermal treatment. As a result, freestanding ceramic porous films
have been obtained after degradation of the organic template core particles. Noteworthy,
the conversion of the matrix material consisting of SMP-10 into the ceramic occurred
with preservation of the pristine colloidal crystal template structure. Herein,
the first example of core-shell particle preparation by combining different polymerization
methodologies and application of the convenient melt-shear organization technique
is shown, paving a new way to ceramic materials with tailored morphology and porosity.
author:
- first_name: Steffen
full_name: Vowinkel, Steffen
last_name: Vowinkel
- first_name: Anna
full_name: Boehm, Anna
last_name: Boehm
- first_name: Timmy
full_name: Schäfer, Timmy
last_name: Schäfer
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Emanuel
full_name: Ionescu, Emanuel
last_name: Ionescu
- first_name: Markus
full_name: Gallei, Markus
last_name: Gallei
citation:
ama: Vowinkel S, Boehm A, Schäfer T, Gutmann T, Ionescu E, Gallei M. Preceramic
core-shell particles for the preparation of hybrid colloidal crystal films by
melt-shear organization and conversion into porous ceramics. Materials &
Design. 2018;160:926–935. doi:10.1016/j.matdes.2018.10.032
apa: Vowinkel, S., Boehm, A., Schäfer, T., Gutmann, T., Ionescu, E., & Gallei,
M. (2018). Preceramic core-shell particles for the preparation of hybrid colloidal
crystal films by melt-shear organization and conversion into porous ceramics.
Materials & Design, 160, 926–935. https://doi.org/10.1016/j.matdes.2018.10.032
bibtex: '@article{Vowinkel_Boehm_Schäfer_Gutmann_Ionescu_Gallei_2018, title={Preceramic
core-shell particles for the preparation of hybrid colloidal crystal films by
melt-shear organization and conversion into porous ceramics}, volume={160}, DOI={10.1016/j.matdes.2018.10.032},
journal={Materials & Design}, author={Vowinkel, Steffen and Boehm, Anna and
Schäfer, Timmy and Gutmann, Torsten and Ionescu, Emanuel and Gallei, Markus},
year={2018}, pages={926–935} }'
chicago: 'Vowinkel, Steffen, Anna Boehm, Timmy Schäfer, Torsten Gutmann, Emanuel
Ionescu, and Markus Gallei. “Preceramic Core-Shell Particles for the Preparation
of Hybrid Colloidal Crystal Films by Melt-Shear Organization and Conversion into
Porous Ceramics.” Materials & Design 160 (2018): 926–935. https://doi.org/10.1016/j.matdes.2018.10.032.'
ieee: 'S. Vowinkel, A. Boehm, T. Schäfer, T. Gutmann, E. Ionescu, and M. Gallei,
“Preceramic core-shell particles for the preparation of hybrid colloidal crystal
films by melt-shear organization and conversion into porous ceramics,” Materials
& Design, vol. 160, pp. 926–935, 2018, doi: 10.1016/j.matdes.2018.10.032.'
mla: Vowinkel, Steffen, et al. “Preceramic Core-Shell Particles for the Preparation
of Hybrid Colloidal Crystal Films by Melt-Shear Organization and Conversion into
Porous Ceramics.” Materials & Design, vol. 160, 2018, pp. 926–935,
doi:10.1016/j.matdes.2018.10.032.
short: S. Vowinkel, A. Boehm, T. Schäfer, T. Gutmann, E. Ionescu, M. Gallei, Materials
& Design 160 (2018) 926–935.
date_created: 2026-02-07T16:15:42Z
date_updated: 2026-02-17T16:12:52Z
doi: 10.1016/j.matdes.2018.10.032
extern: '1'
intvolume: ' 160'
keyword:
- emulsion polymerization
- self-assembly
- ATRP
- Colloidal crystal
- Hybrid film
- Particle processing
language:
- iso: eng
page: 926–935
publication: Materials & Design
status: public
title: Preceramic core-shell particles for the preparation of hybrid colloidal crystal
films by melt-shear organization and conversion into porous ceramics
type: journal_article
user_id: '100715'
volume: 160
year: '2018'
...
---
_id: '64053'
abstract:
- lang: eng
text: The utilization and preparation of functional hybrid films for optical sensing
applications and membranes is of utmost importance. In this work, we report the
convenient and scalable preparation of self-crosslinking particle-based films
derived by directed self-assembly of alkoxysilane-based cross-linkers as part
of a core-shell particle architecture. The synthesis of well-designed monodisperse
core-shell particles by emulsion polymerization is the basic prerequisite for
subsequent particle processing via the melt-shear organization technique. In more
detail, the core particles consist of polystyrene (PS) or poly(methyl methacrylate)
(PMMA), while the comparably soft particle shell consists of poly(ethyl acrylate)
(PEA) and different alkoxysilane-based poly(methacrylate)s. For hybrid film formation
and convenient self-cross-linking, different alkyl groups at the siloxane moieties
were investigated in detail by solid-state Magic-Angle Spinning Nuclear Magnetic
Resonance (MAS, NMR) spectroscopy revealing different crosslinking capabilities,
which strongly influence the properties of the core or shell particle films with
respect to transparency and iridescent reflection colors. Furthermore, solid-state
NMR spectroscopy and investigation of the thermal properties by differential scanning
calorimetry (DSC) measurements allow for insights into the cross-linking capabilities
prior to and after synthesis, as well as after the thermally and pressure-induced
processing steps. Subsequently, free-standing and self-crosslinked particle-based
films featuring excellent particle order are obtained by application of the melt-shear
organization technique, as shown by microscopy (TEM, SEM).
author:
- first_name: S.
full_name: Vowinkel, S.
last_name: Vowinkel
- first_name: S.
full_name: Paul, S.
last_name: Paul
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: M.
full_name: Gallei, M.
last_name: Gallei
citation:
ama: Vowinkel S, Paul S, Gutmann T, Gallei M. Free-Standing and Self-Crosslinkable
Hybrid Films by Core-Shell Particle Design and Processing. Nanomaterials.
2017;7(11):390. doi:10.3390/nano7110390
apa: Vowinkel, S., Paul, S., Gutmann, T., & Gallei, M. (2017). Free-Standing
and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing.
Nanomaterials, 7(11), 390. https://doi.org/10.3390/nano7110390
bibtex: '@article{Vowinkel_Paul_Gutmann_Gallei_2017, title={Free-Standing and Self-Crosslinkable
Hybrid Films by Core-Shell Particle Design and Processing}, volume={7}, DOI={10.3390/nano7110390}, number={11},
journal={Nanomaterials}, author={Vowinkel, S. and Paul, S. and Gutmann, Torsten
and Gallei, M.}, year={2017}, pages={390} }'
chicago: 'Vowinkel, S., S. Paul, Torsten Gutmann, and M. Gallei. “Free-Standing
and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design and Processing.”
Nanomaterials 7, no. 11 (2017): 390. https://doi.org/10.3390/nano7110390.'
ieee: 'S. Vowinkel, S. Paul, T. Gutmann, and M. Gallei, “Free-Standing and Self-Crosslinkable
Hybrid Films by Core-Shell Particle Design and Processing,” Nanomaterials,
vol. 7, no. 11, p. 390, 2017, doi: 10.3390/nano7110390.'
mla: Vowinkel, S., et al. “Free-Standing and Self-Crosslinkable Hybrid Films by
Core-Shell Particle Design and Processing.” Nanomaterials, vol. 7, no.
11, 2017, p. 390, doi:10.3390/nano7110390.
short: S. Vowinkel, S. Paul, T. Gutmann, M. Gallei, Nanomaterials 7 (2017) 390.
date_created: 2026-02-07T16:15:23Z
date_updated: 2026-02-17T16:12:54Z
doi: 10.3390/nano7110390
extern: '1'
intvolume: ' 7'
issue: '11'
keyword:
- Materials Science
- Science & Technology - Other Topics
- solid-state nmr
- spectroscopy
- catalysts
- colloidal crystals
- colloids
- cross-linking
- elastomeric opal films
- emulsion polymerization
- gamma-methacryloxypropyltrimethoxysilane
- hybrid films
- melt-shear organization
- nanoparticles
- particle
- photons
- polymers
- processing
- self-assembly
- transition
language:
- iso: eng
page: '390'
publication: Nanomaterials
publication_identifier:
issn:
- 2079-4991
status: public
title: Free-Standing and Self-Crosslinkable Hybrid Films by Core-Shell Particle Design
and Processing
type: journal_article
user_id: '100715'
volume: 7
year: '2017'
...
---
_id: '9878'
abstract:
- lang: eng
text: (K,Na)NbO3 ceramics have attracted much attention as lead-free piezoelectric
materials with high piezoelectric properties. High-quality (K,Na)NbO3 ceramics
can be sintered using KNbO3 and NaNbO3 powders synthesized by a hydrothermal method.
In this study, to enhance the quality factor of the ceramics, high-power ultrasonic
irradiation was employed during the hydrothermal method, which led to a reduction
in the particle size of the resultant powders.
author:
- first_name: G.
full_name: Isobe, G.
last_name: Isobe
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: Isobe G, Maeda T, Bornmann P, Hemsel T, Morita T. Synthesis of lead-free piezoelectric
powders by ultrasonic-assisted hydrothermal method and properties of sintered
(K0.48Na0.52)NBO3 ceramics. Ultrasonics, Ferroelectrics, and Frequency Control,
IEEE Transactions on. 2014;61(2):225-230. doi:10.1109/TUFFC.2014.6722608
apa: Isobe, G., Maeda, T., Bornmann, P., Hemsel, T., & Morita, T. (2014). Synthesis
of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method
and properties of sintered (K0.48Na0.52)NBO3 ceramics. Ultrasonics, Ferroelectrics,
and Frequency Control, IEEE Transactions On, 61(2), 225–230. https://doi.org/10.1109/TUFFC.2014.6722608
bibtex: '@article{Isobe_Maeda_Bornmann_Hemsel_Morita_2014, title={Synthesis of lead-free
piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
of sintered (K0.48Na0.52)NBO3 ceramics}, volume={61}, DOI={10.1109/TUFFC.2014.6722608},
number={2}, journal={Ultrasonics, Ferroelectrics, and Frequency Control, IEEE
Transactions on}, author={Isobe, G. and Maeda, Takafumi and Bornmann, Peter and
Hemsel, Tobias and Morita, Takeshi}, year={2014}, pages={225–230} }'
chicago: 'Isobe, G., Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi
Morita. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal
Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” Ultrasonics,
Ferroelectrics, and Frequency Control, IEEE Transactions On 61, no. 2 (2014):
225–30. https://doi.org/10.1109/TUFFC.2014.6722608.'
ieee: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Synthesis of lead-free
piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
of sintered (K0.48Na0.52)NBO3 ceramics,” Ultrasonics, Ferroelectrics, and Frequency
Control, IEEE Transactions on, vol. 61, no. 2, pp. 225–230, 2014.
mla: Isobe, G., et al. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted
Hydrothermal Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” Ultrasonics,
Ferroelectrics, and Frequency Control, IEEE Transactions On, vol. 61, no.
2, 2014, pp. 225–30, doi:10.1109/TUFFC.2014.6722608.
short: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics, Ferroelectrics,
and Frequency Control, IEEE Transactions On 61 (2014) 225–230.
date_created: 2019-05-20T13:10:14Z
date_updated: 2019-09-16T10:53:17Z
department:
- _id: '151'
doi: 10.1109/TUFFC.2014.6722608
intvolume: ' 61'
issue: '2'
keyword:
- Q-factor
- ceramics
- crystal growth from solution
- particle size
- piezoelectric materials
- potassium compounds
- powders
- sintering
- sodium compounds
- ultrasonic effects
- (K0.48Na0.52)NbO3
- KNbO3 powders
- NaNbO3 powders
- high-power ultrasonic irradiation
- lead-free piezoelectric materials
- lead-free piezoelectric powders
- particle size reduction
- piezoelectric properties
- quality factor
- sintered (K0.48Na0.52)NbO3 ceramics
- sintering
- ultrasonic-assisted hydrothermal method
- Acoustics
- Ceramics
- Lead
- Piezoelectric materials
- Powders
- Radiation effects
- Transducers
language:
- iso: eng
page: 225-230
publication: Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions
on
publication_identifier:
issn:
- 0885-3010
quality_controlled: '1'
status: public
title: Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal
method and properties of sintered (K0.48Na0.52)NBO3 ceramics
type: journal_article
user_id: '55222'
volume: 61
year: '2014'
...
---
_id: '9879'
abstract:
- lang: eng
text: Application of prognostics and health management (PHM) in the field of Proton
Exchange Membrane (PEM) fuel cells is emerging as an important tool in increasing
the reliability and availability of these systems. Though a lot of work is currently
being conducted to develop PHM systems for fuel cells, various challenges have
been encountered including the self-healing effect after characterization as well
as accelerated degradation due to dynamic loading, all which make RUL predictions
a difficult task. In this study, a prognostic approach based on adaptive particle
filter algorithm is proposed. The novelty of the proposed method lies in the introduction
of a self-healing factor after each characterization and the adaption of the degradation
model parameters to fit to the changing degradation trend. An ensemble of five
different state models based on weighted mean is then developed. The results show
that the method is effective in estimating the remaining useful life of PEM fuel
cells, with majority of the predictions falling within 5\% error. The method was
employed in the IEEE 2014 PHM Data Challenge and led to our team emerging the
winner of the RUL category of the challenge.
author:
- first_name: 'James Kuria '
full_name: 'Kimotho, James Kuria '
last_name: Kimotho
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Kimotho JK, Meyer T, Sextro W. PEM fuel cell prognostics using particle filter
with model parameter adaptation. In: Prognostics and Health Management (PHM),
2014 IEEE Conference On. ; 2014:1-6. doi:10.1109/ICPHM.2014.7036406'
apa: Kimotho, J. K., Meyer, T., & Sextro, W. (2014). PEM fuel cell prognostics
using particle filter with model parameter adaptation. In Prognostics and Health
Management (PHM), 2014 IEEE Conference on (pp. 1–6). https://doi.org/10.1109/ICPHM.2014.7036406
bibtex: '@inproceedings{Kimotho_Meyer_Sextro_2014, title={PEM fuel cell prognostics
using particle filter with model parameter adaptation}, DOI={10.1109/ICPHM.2014.7036406},
booktitle={Prognostics and Health Management (PHM), 2014 IEEE Conference on},
author={Kimotho, James Kuria and Meyer, Tobias and Sextro, Walter}, year={2014},
pages={1–6} }'
chicago: Kimotho, James Kuria , Tobias Meyer, and Walter Sextro. “PEM Fuel Cell
Prognostics Using Particle Filter with Model Parameter Adaptation.” In Prognostics
and Health Management (PHM), 2014 IEEE Conference On, 1–6, 2014. https://doi.org/10.1109/ICPHM.2014.7036406.
ieee: J. K. Kimotho, T. Meyer, and W. Sextro, “PEM fuel cell prognostics using particle
filter with model parameter adaptation,” in Prognostics and Health Management
(PHM), 2014 IEEE Conference on, 2014, pp. 1–6.
mla: Kimotho, James Kuria, et al. “PEM Fuel Cell Prognostics Using Particle Filter
with Model Parameter Adaptation.” Prognostics and Health Management (PHM),
2014 IEEE Conference On, 2014, pp. 1–6, doi:10.1109/ICPHM.2014.7036406.
short: 'J.K. Kimotho, T. Meyer, W. Sextro, in: Prognostics and Health Management
(PHM), 2014 IEEE Conference On, 2014, pp. 1–6.'
date_created: 2019-05-20T13:11:02Z
date_updated: 2019-05-20T13:12:27Z
department:
- _id: '151'
doi: 10.1109/ICPHM.2014.7036406
keyword:
- ageing
- particle filtering (numerical methods)
- proton exchange membrane fuel cells
- remaining life assessment
- PEM fuel cell prognostics
- PHM
- RUL predictions
- accelerated degradation
- adaptive particle filter algorithm
- dynamic loading
- model parameter adaptation
- prognostics and health management
- proton exchange membrane fuel cells
- remaining useful life estimation
- self-healing effect
- Adaptation models
- Data models
- Degradation
- Estimation
- Fuel cells
- Mathematical model
- Prognostics and health management
language:
- iso: eng
page: 1-6
publication: Prognostics and Health Management (PHM), 2014 IEEE Conference on
status: public
title: PEM fuel cell prognostics using particle filter with model parameter adaptation
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '11943'
abstract:
- lang: eng
text: A marginalized particle filter is proposed for performing single channel speech
enhancement with a non-linear dynamic state model. The system consists of a particle
filter for tracking line spectral pair (LSP) parameters and a Kalman filter per
particle for speech enhancement. The state model for the LSPs has been learnt
on clean speech training data. In our approach parameters and speech samples are
processed at different time scales by assuming the parameters to be constant for
small blocks of data. Further enhancement is obtained by an iteration which can
be applied on these small blocks. The experiments show that similar SNR gains
are obtained as with the Kalman-LM-iterative algorithm. However better values
of the noise level and the log-spectral distance are achieved
author:
- first_name: Stefan
full_name: Windmann, Stefan
last_name: Windmann
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Windmann S, Haeb-Umbach R. Iterative Speech Enhancement using a Non-Linear
Dynamic State Model of Speech and its Parameters. In: IEEE International Conference
on Acoustics, Speech and Signal Processing (ICASSP 2006). Vol 1. ; 2006:I.
doi:10.1109/ICASSP.2006.1660058'
apa: Windmann, S., & Haeb-Umbach, R. (2006). Iterative Speech Enhancement using
a Non-Linear Dynamic State Model of Speech and its Parameters. In IEEE International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2006) (Vol.
1, p. I). https://doi.org/10.1109/ICASSP.2006.1660058
bibtex: '@inproceedings{Windmann_Haeb-Umbach_2006, title={Iterative Speech Enhancement
using a Non-Linear Dynamic State Model of Speech and its Parameters}, volume={1},
DOI={10.1109/ICASSP.2006.1660058},
booktitle={IEEE International Conference on Acoustics, Speech and Signal Processing
(ICASSP 2006)}, author={Windmann, Stefan and Haeb-Umbach, Reinhold}, year={2006},
pages={I} }'
chicago: Windmann, Stefan, and Reinhold Haeb-Umbach. “Iterative Speech Enhancement
Using a Non-Linear Dynamic State Model of Speech and Its Parameters.” In IEEE
International Conference on Acoustics, Speech and Signal Processing (ICASSP 2006),
1:I, 2006. https://doi.org/10.1109/ICASSP.2006.1660058.
ieee: S. Windmann and R. Haeb-Umbach, “Iterative Speech Enhancement using a Non-Linear
Dynamic State Model of Speech and its Parameters,” in IEEE International Conference
on Acoustics, Speech and Signal Processing (ICASSP 2006), 2006, vol. 1, p.
I.
mla: Windmann, Stefan, and Reinhold Haeb-Umbach. “Iterative Speech Enhancement Using
a Non-Linear Dynamic State Model of Speech and Its Parameters.” IEEE International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2006), vol.
1, 2006, p. I, doi:10.1109/ICASSP.2006.1660058.
short: 'S. Windmann, R. Haeb-Umbach, in: IEEE International Conference on Acoustics,
Speech and Signal Processing (ICASSP 2006), 2006, p. I.'
date_created: 2019-07-12T05:31:15Z
date_updated: 2022-01-06T06:51:12Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2006.1660058
intvolume: ' 1'
keyword:
- clean speech training data
- iterative methods
- iterative speech enhancement
- Kalman filter
- Kalman filters
- Kalman-LM-iterative algorithm
- line spectral pair parameters
- log-spectral distance
- marginalized particle filter
- noise level
- nonlinear dynamic state speech model
- particle filtering (numerical methods)
- single channel speech enhancement
- SNR gains
- speech enhancement
- speech samples
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2006/WiHa06-2.pdf
oa: '1'
page: I
publication: IEEE International Conference on Acoustics, Speech and Signal Processing
(ICASSP 2006)
status: public
title: Iterative Speech Enhancement using a Non-Linear Dynamic State Model of Speech
and its Parameters
type: conference
user_id: '44006'
volume: 1
year: '2006'
...
---
_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'
...