Filters








75 Hits in 7.2 sec

Quantization

R.M. Gray, D.L. Neuhoff
1998 IEEE Transactions on Information Theory  
Also in 1948, Bennett published the first high-resolution analysis of quantization and an exact analysis of quantization noise for Gaussian processes, and Shannon published the beginnings of rate distortion  ...  promising techniques for quantization.  ...  Of particular assistance were A. Gersho, B. Girod, N. Kashyap, T. Linder, N. Moayeri, P. Moo, Y. Shtarkov, S. Verdú, M. Vetterli, and K. Zeger.  ... 
doi:10.1109/18.720541 fatcat:55w3lmruijalxe4yht676re62e

Channel Whispering: a Protocol for Physical Layer Group Key Generation. Application to IR-UWB through Deconvolution [article]

Iulia Tunaru and Benoît Denis and Régis Perrier and Bernard Uguen
2018 arXiv   pre-print
Herein, we complete the analysis of the proposed protocol and investigate several signal processing algorithms to generate the s-signal expressed as a solution to a deconvolution problem in the case of  ...  The physical layer security framework provides models, algorithms, and proofs of concept for generating pairwise symmetric keys over single links between two nodes within communication range.  ...  Multi-link physical layer key generation The secret key capacities for the source model with multiple terminals including a subset of helpers, various extents of an eavesdropper's knowledge, and unrestricted  ... 
arXiv:1801.04473v1 fatcat:m6jco7mg2jakrlvjkh4aaqkcfa

Quantum control of a nanoparticle optically levitated in cryogenic free space [article]

Felix Tebbenjohanns, M. Luisa Mattana, Massimiliano Rossi, Martin Frimmer, Lukas Novotny
2021 arXiv   pre-print
The absence of an optical resonator and its bandwidth limitations holds promise to transfer the full quantum control available for electromagnetic fields to a mechanical system.  ...  We cool its center-of-mass motion by measurement-based feedback to an average occupancy of 0.65 motional quanta, corresponding to a state purity of 43%.  ...  Zielinska for input and discussions.  ... 
arXiv:2103.03853v2 fatcat:nrfsxiijezhsnlfb47xwjptquy

UWB waveform generator for digital CMOS radar

Oystein Bjorndal, Svein-Erik Hamran, Tor Sverre Lande
2015 2015 IEEE International Symposium on Circuits and Systems (ISCAS)  
Single bit quantization is explored in detail, showing the benefits of simple implementation, the feasibility of continuous time design and only slightly degraded signal quality in noisy environments compared  ...  Small, low cost, radar systems have exciting applications in monitoring and imaging for the industrial, healthcare and Internet of Things (IoT) sectors.  ...  Acknowledgment The authors would like to thank Kristian Gjertsen Kjelgård for assistance with measurements and insightful discussions.  ... 
doi:10.1109/iscas.2015.7168932 dblp:conf/iscas/BjorndalHL15 fatcat:hsaophgfxbgfxevpohbmn5dde4

TEO-based speaker stress assessment using hybrid classification and tracking schemes

John H. L. Hansen, Evan Ruzanski, Hynek Bořil, James Meyerhoff
2012 International Journal of Speech Technology  
The focus of this study is on the analysis of stress-induced variations in speech and design of an automatic stress level assessment scheme that could be used in directing stressdependent acoustic models  ...  However, speech production changes in individuals due to stress and emotions have similarly detrimental effect also on the task of speaker recognition as they introduce mismatch with the speaker models  ...  and the source are credited.  ... 
doi:10.1007/s10772-012-9165-1 fatcat:mawsyjzsqrbbnco5vsr5vpdzmi

Subjective relevance of objective measures for spatial impression

Lily M. Wang, Anders C. Gade
2000 Journal of the Acoustical Society of America  
mismatches.  ...  Three different sources of errors in this analysis were investigated using synthesized vowels: ͑1͒ F0 quantization: In addition to the expected result that error increases with F0, it was found that the  ...  Gaussian. 4pSC29.  ... 
doi:10.1121/1.428749 fatcat:2246ie7m3bagxlrls5fkc3cdfu

Energy and wavelength scaling of shock-ignited inertial fusion targets

S Atzeni, A Marocchino, A Schiavi, G Schurtz
2013 New Journal of Physics  
From density functional calculations we find that the low-T magnetic phase is paraelectric and the intermediate magnetic phase ferroelectric, with a size and direction of polarization in good agreement  ...  We disucss how this kind of multiferrolectricity can be manipulated by imputrities and light pulses and show estimates of the effect in CuO.  ...  We will present the structural and electronic properties of novel mismatched systems obtained by intercalation of one-single ferromagnetic (FM=Ni, Co) layer on graphene/Ir(111).  ... 
doi:10.1088/1367-2630/15/4/045004 fatcat:c4lh6z3uavbktgx4didzjqxoiy

Manipulating quantum entanglement with atoms and photons in a cavity

J. M. Raimond, M. Brune, S. Haroche
2001 Reviews of Modern Physics  
We have also investigated entanglement as a resource for the processing of quantum information.  ...  Entanglement is also essential to understand decoherence, the process accounting for the classical appearance of the macroscopic world.  ...  spin-singlet state, it takes the same form, as shown above, for any orientation of the quantization axis.  ... 
doi:10.1103/revmodphys.73.565 fatcat:5kkhgvuv5fct5c63kmhrncxbmm

Underwater noise due to precipitation

Lawrence A. Crum, Hugh C. Pumphrey, Andrea Prosperetti, Leif Bjorno
1989 Journal of the Acoustical Society of America  
However, the extraordinary spatial and temporal variability of the ocean has frustrated underwater acousticians for decades.  ...  Sound propagation is the preeminent technique for sensing, identifying, and communicating under the ocean surface.  ...  Gaussian beam algorithm for bottom reflection and head waves due to extended aperture sources. X. J. Gao and L. B.  ... 
doi:10.1121/1.2026824 fatcat:xbwjl6wggjh5xee7ci2vcphfd4

Content-Based Image Retrieval Using Self-Organizing Maps [chapter]

Jorma Laaksonen, Markus Koskela, Erkki Oja
1999 Lecture Notes in Computer Science  
As a result, the amount of data in visual form is increasing and there is a strong need for effective ways to manage and process it.  ...  In many settings, the existing and widely adopted methods for text-based indexing and information retrieval are inadequate for these new purposes.  ...  Recommended indexing methods for kNN queries in various sources include optimized versions of the k-d-tree (see e.g.  ... 
doi:10.1007/3-540-48762-x_67 fatcat:6pqbfjjhibbudlx5fquttmzete

Enhancing resolution properties of array antennas via field extrapolation: application to MIMO systems

Ruggero Reggiannini
2015 EURASIP Journal on Advances in Signal Processing  
Possible applications are in multiple-input multiple-output (MIMO) wireless links for the purpose of increasing the spatial multiplexing gain in a scattering environment, as well as in other areas such  ...  (s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.  ...  Assuming for the components of δw a complex-valued IID Gaussian model with zero mean and variances of the real and imaginary components all equal to σ 2 w , after some elaboration, we are led to E δG E  ... 
doi:10.1186/s13634-015-0257-3 fatcat:gvv5khxbl5f3xhfbfwixar2h7e

Advances in Electron Microscopy with Deep Learning

Jeffrey Ede
2020 Zenodo  
This version of my thesis is typeset for online dissemination to improve readability, whereas the thesis submitted to the University of Warwick in support of my application for the degree of Doctor of  ...  Highlights include a comprehensive review of deep learning in electron microscopy; large new electron microscopy datasets for machine learning, dataset search engines based on variational autoencoders,  ...  Acknowledgements Thanks go to Jeremy Sloan and Martin Lotz for internally reviewing this article.  ... 
doi:10.5281/zenodo.4598227 fatcat:hm2ksetmsvf37adjjefmmbakvq

Advances in Electron Microscopy with Deep Learning

Jeffrey Ede
2020 Zenodo  
This version of my thesis is typeset for online dissemination to improve readability, whereas the thesis submitted to the University of Warwick in support of my application for the degree of Doctor of  ...  Highlights include a comprehensive review of deep learning in electron microscopy; large new electron microscopy datasets for machine learning, dataset search engines based on variational autoencoders,  ...  Acknowledgements Thanks go to Jeremy Sloan and Martin Lotz for internally reviewing this article.  ... 
doi:10.5281/zenodo.4591029 fatcat:zn2hvfyupvdwlnvsscdgswayci

Advances in Electron Microscopy with Deep Learning

Jeffrey Ede
2020 Zenodo  
This copy of my thesis is typeset for online dissemination to improve readability, whereas the thesis submitted to the University of Warwick in support of my application for the degree of Doctor of Philosophy  ...  Highlights include a comprehensive review of deep learning in electron microscopy; large new electron microscopy datasets for machine learning, dataset search engines based on variational autoencoders,  ...  Acknowledgements Thanks go to Jeremy Sloan and Martin Lotz for internally reviewing this article.  ... 
doi:10.5281/zenodo.4399748 fatcat:63ggmnviczg6vlnqugbnrexsgy

Quality assessment in laser welding: a critical review

John Stavridis, Alexios Papacharalampopoulos, Panagiotis Stavropoulos
2017 The International Journal of Advanced Manufacturing Technology  
Research gaps and implications of the quality assessment in laser welding are also described, and a future outlook of the research in the particular field is provided.  ...  Quality assessment methods and techniques for laser welding have been developed both in-and post-process.  ...  The dissemination of results herein reflects only the authors' view, and the Commission is not responsible for any use that may be made of the information it contains.  ... 
doi:10.1007/s00170-017-0461-4 fatcat:7iykonrmrfa3dc5vfukvgksmju
« Previous Showing results 1 — 15 out of 75 results