Filters








22,388 Hits in 4.0 sec

Page 5188 of Mathematical Reviews Vol. , Issue 84m [page]

1984 Mathematical Reviews  
In these, the cuts are done alternately with both points of a compass to one side (along the time axis).  ...  equidistant points with a dummy scale of centers, having a high degree of adaptability.  ... 

Optimal control of selective vibrational excitation in harmonic linear chain molecules

Shenghua Shi, Andrea Woody, Herschel Rabitz
1988 Journal of Chemical Physics  
of ES in combination with Legendre polynomials and frequency-resolved detection.  ...  The optimal phase profile can be programmed on the pulse by adaptive pulse shaping. A promising optimization algorithm for such adaptive experiments is evolution strategy (ES).  ...  Offerhaus for helpful discussions, and Dr. Thomas Bäck, Mr. Lars Willmes, and Dr. Riccardo Fanciulli for their helps with the implementation and interpretation of the algorithm.  ... 
doi:10.1063/1.454384 fatcat:fe4mcvytpnak7ispfurrtqbpga

Generation of 0.5 mJ, few-cycle laser pulses by an adaptive phase modulator

He Wang, Yi Wu, Chengquan Li, Hiroki Mashiko, Steve Gilbertson, Zenghu Chang
2008 Optics Express  
Previously, pulses shorter than 4 fs were generated by compressing white light from gas-filled hollow-core fibers with adaptive phase modulators; however, the energy of the few-cycle pulses was limited  ...  When the pulses were used in high harmonic generation, it was found that the harmonic spectra depend strongly on the high order spectral phases of the driving laser fields.  ...  We also want to thank Michael Chini and Sabih D. Khan for their help with the software.  ... 
doi:10.1364/oe.16.014448 pmid:18794981 fatcat:5nu3k6emxfht5b7ii7ibnaowo4

Robust orthogonal parameterization of evolution strategy for adaptive laser pulse shaping

Aliakbar Jafarpour, Janne Savolainen, Rianne de Jong, Jacob Middag, Daan P. Sprünken, Peter van der Walle, Di Yang, Jennifer L. Herek
2009 Optics Express  
of ES in combination with Legendre polynomials and frequency-resolved detection.  ...  The optimal phase profile can be programmed on the pulse by adaptive pulse shaping. A promising optimization algorithm for such adaptive experiments is evolution strategy (ES).  ...  Offerhaus for helpful discussions, and Dr. Thomas Bäck, Mr. Lars Willmes, and Dr. Riccardo Fanciulli for their helps with the implementation and interpretation of the algorithm.  ... 
doi:10.1364/oe.17.011986 pmid:19582114 fatcat:n2rr4ctwobbgjm5nlxukfaddcu

Robust Processing of Nonstationary Signals

Igor Djurović, Ljubiša Stanković, Markus Rupp (EURASIPMember), Ling Shao
2010 EURASIP Journal on Advances in Signal Processing  
Other alternatives are based on the standard approaches (optimization, iterative, and ML strategies) modified for nonstationary signals or signals with high-frequency content.  ...  Several adaptive estimators of location parameter are considered, and it is shown that their application is preferable with respect to nonadaptive counterparts.  ...  Other alternatives are based on the standard approaches (optimization, iterative, and ML strategies) modified for nonstationary signals or signals with high-frequency content.  ... 
doi:10.1155/2010/724746 fatcat:szdryrbksja2feukzjadkrnkgy

Affine scaling transformation algorithms for harmonic retrieval in a compressive sampling framework

Sergio D. Cabrera, Jose Gerardo Rosiles, Alejandro E. Brito, Dimitri Van De Ville, Vivek K. Goyal, Manos Papadakis
2007 Wavelets XII  
In this paper we investigate the use of the Affine Scaling Transformation (AST) family of algorithms in solving the sparse signal recovery problem of harmonic retrieval for the DFT-grid frequencies case  ...  For the harmonic retrieval problem, we focus on linear measurements in the form of: consecutively located time samples, randomly located time samples, and (Gaussian) random linear projections.  ...  THE AST ALGORITHM FOR DFT-GRID HARMONIC RETRIEVAL.  ... 
doi:10.1117/12.735139 fatcat:7acmaokacnc33e56cg7ieau5oi

3D Model Retrieval Based on Adaptive Views Clustering [chapter]

Tarik Filali Ansary, Mohamed Daoudi, Jean-Phillipe Vandeborre
2005 Lecture Notes in Computer Science  
The characteristic views selection algorithm is based on an adaptive clustering algorithm and using statistical model distribution scores to select the optimal number of views.  ...  The goal of this method is to provide an optimal selection of 2D views from a 3D model, and a probabilistic Bayesian method for 3D model retrieval from these views.  ...  Acknowledgments This work is supported by the French Research Ministry and the RNRT (Réseau National de Recherche en Télécommunications) within the framework of the SEMANTIC-3D National Project (http:/  ... 
doi:10.1007/11552499_53 fatcat:v2zm6b6oq5dmzg5g3vvmniahvy

Harmonic-Percussive Source Separation with Deep Neural Networks and Phase Recovery [article]

Konstantinos Drossos, Paul Magron, Stylianos Ioannis Mimilakis, and Tuomas Virtanen
2018 arXiv   pre-print
Then, we retrieve the complex-valued short-time Fourier transform of the sources by means of a phase recovery algorithm, which minimizes the reconstruction error and enforces the phase of the harmonic  ...  In this paper, we propose to apply the recently introduced Masker-Denoiser with twin networks (MaD TwinNet) system to this task.  ...  Here, we propose to adapt the phase retrieval algorithm introduced in [21] to the specific case of HPSS.  ... 
arXiv:1807.11298v1 fatcat:glh4bqk7avdmva67ix4ftmu7oi

Extending Nonnegative Matrix Factorization---A Discussion In The Context Of Multiple Frequency Estimation Of Musical Signals

Nobutaka Ono, Stanislaw Raczynski, Shigeki Sagayama
2009 Zenodo  
(a) Fixed harmonic basis, (b) basis pretrained on RWC piano recordings, (c) adaptive harmonic basis, (d) adaptive harmonic basis with additional regularizations, (e) fixed harmonic basis with regularizations  ...  NNMA is an optimization problem with the penalty function being a Bregman divergence between the data X and its approximation AS and with a constraint of nonnegativity [6] .  ... 
doi:10.5281/zenodo.41704 fatcat:xm2qvg3tnvdvvfjds6dgllknpm

Automated phase characterization and adaptive pulse compression using multiphoton intrapulse interference phase scan in air

D. Ahmasi Harris, Janelle C. Shane, Vadim V. Lozovoy, Marcos Dantus
2007 Optics Express  
harmonic generation in air.  ...  We introduce a non-interferometric single beam method for automated spectral phase characterization and adaptive pulse compression of amplified ultrashort femtosecond pulses taking advantage of third order  ...  for characterization and optimization of amplified ultrashort pulses.  ... 
doi:10.1364/oe.15.001932 pmid:19532432 fatcat:vbif6qv64ve35pq2l5bxwsassq

Iterative prewhitening for multidimensional harmonic retrieval: New variants and comparative study

Kefei Liu, Joao Paulo C. L. da Costa, H. C. So, Rafael Timoteo de Sousa
2013 2013 5th IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP)  
In order to efficiently separate the signal and noise subspaces, prewhitening is applied to decorrelate the noise samples prior to harmonic retrieval.  ...  In the presence of colored noise, subspace based harmonic retrieval algorithms suffer a performance degradation due to the interference between signal and noise subspaces.  ...  CONCLUSION In case noise-only observation samples are unavailable, recently an iterative algorithm for joint prewhitening and harmonic retrieval has been proposed for a good separation of signal and noise  ... 
doi:10.1109/camsap.2013.6714046 dblp:conf/camsap/LiuCSJ13 fatcat:o2qcdnhdyrd2re5nazw64km36m

Adaptive Extremum Seeking Control of Urban Area Wind Turbines

Felix Dietrich, Steffen Borchers-Tigasson, Till Naumann, Horst Schulte
2021 Energies  
For this purpose, an adaptive control approach that is fast and robust is required.  ...  Finally, a validation of the proposed approach is performed considering real wind data, thus demonstrating its fast and robust adaptability.  ...  Extremum seeking employs a continuous harmonic perturbation and uses the measured response to estimate the sign and amplitude of a gradient of the power map to adapt the control input optimally.  ... 
doi:10.3390/en14051356 doaj:9de03f33b7bc4bb9be4d07191675ef36 fatcat:vmdq7nz5cfgadiijl5qxpcp7za

A Harmonized Dynamic Quality of Service Aware Data Replication Strategy in Cloud

2019 VOLUME-8 ISSUE-10, AUGUST 2019, REGULAR ISSUE  
Conclusion: The storage effectiveness has been improved by means of data deduplication and for the experiments, the static, the adaptive and the methods of harmonized replication have been used.  ...  Result: The harmonized replication performed better in terms of produce bandwidth and saving by about 12.5%.  ...  RESULTS AND DISCUSSION For the experiment static, the adaptive the harmonized replication algorithms will be used.  ... 
doi:10.35940/ijitee.k2481.0981119 fatcat:452bypyggvdidhtk6gdnvyjlri

In-situ temporal measurement of ultrashort laser pulses at full power during high-intensity laser-matter interactions

Helder Crespo, Tobias Witting, Miguel Canhota, Miguel Miranda, John Tisch
2020 Optica  
This allows pulse optimization and meaningful comparison with theory, and it can shed fundamental new light on pulse distortions occurring in or on the target.  ...  Here we introduce and demonstrate a new technique based on dispersion-scan using the concurrent third harmonic emission from the target that permits the full (amplitude and phase), in situ, in-parallel  ...  In cases such as for our experiment, where the target thickness is small compared to the confocal parameter of the focused laser beam, the generation volumes for the TH and high harmonics will overlap,  ... 
doi:10.1364/optica.398319 fatcat:j5lviiaypncabjy3k6nl4kh35u

Fast live cell imaging at nanometer scale using annihilating filter-based low-rank Hankel matrix approach

Junhong Min, Lina Carlini, Michael Unser, Suliana Manley, Jong Chul Ye, Manos Papadakis, Vivek K. Goyal, Dimitri Van De Ville
2015 Wavelets and Sparsity XVI  
Furthermore, all these optimizations are conducted on Fourier space only. We validated the performance of the new method with numerical experiments and live cell imaging experiment.  ...  Thanks to this fundamental duality, our new algorithm can perform data-adaptive PSF estimation and deconvolution of Fourier spectrum, followed by truly grid-free localization using spectral estimation  ...  Specifically, the algorithm consists of following three steps: 1. data-adaptive PSF estimation, 2. deconvolution of Fourier spectrum, 3. grid-free localization using a matrix-pencil based harmonic retrieval  ... 
doi:10.1117/12.2187393 fatcat:lzwywgnu35aq7how56w4z5qmkq
« Previous Showing results 1 — 15 out of 22,388 results