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Approximate Cyclic Reduction Preconditioning
[chapter]
1998
Lecture Notes in Computational Science and Engineering
Preserved Fulltext
A multilevel structure is obtained by using maximal independent sets for graph coarsening. Ideas from [20], [22] are used to construct a sparse Schur complement approximation. ...
A hybrid method is introduced which uses ideas both from ILU preconditioning and from multigrid. The resulting preconditioning technique requires the matrix only. ...
The author wishes to thank Klaus Gartner (ETH, Ziirich) and Sabine Gutsch (CAU, Kiel) for helpful discussions. ...
doi:10.1007/978-3-642-58734-4_14
fatcat:7zzg2tdx4baavf6wxpoubzteem
Adaptive computation of approximate entropy and its application in integrative analysis of irregularity of heart rate variability and intracranial pressure signals
2008
Medical Engineering and Physics
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The present study introduces an adaptive calculation of approximate entropy (ApEn) by exploiting sample-by-sample construction and update of nearest neighborhoods in an n-dimensional space. ...
the amplitude of transfer function between ICP and RR interval. ...
Acknowledgements The present research has been funded in part by the NIH R01 award (NS054881) to MB and two R21 awards (NS055045 and NS055998) to XH. ...
doi:10.1016/j.medengphy.2007.07.002
pmid:17714974
pmcid:PMC2413186
fatcat:7crualm5zjbqrpgiqza7omglzy
Elastic Maps and Nets for Approximating Principal Manifolds and Their Application to Microarray Data Visualization
[chapter]
2008
Lecture Notes in Computational Science and Engineering
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We show that the method of elastic maps outperforms linear PCA in terms of data approximation, representation of between-point distance structure, preservation of local point neighborhood and representing ...
Our approach is implemented in three programming languages (C++, Java and Delphi) with two graphical user interfaces (VidaExpert http://bioinfo.curie.fr/projects/vidaexpert and ViMiDa http://bioinfo-out.curie.fr ...
To avoid confusion, we can say that the K-means clustering problem consists in finding a good approximation to the global optimum and the algorithm is one of the possible ways to get close to it. ...
doi:10.1007/978-3-540-73750-6_4
fatcat:5gq2p25ph5euxiirkw4n6miqsm
An improved algorithm for Heart Rate tracking during physical exercise using simultaneous wrist-type photoplethysmographic (PPG) and acceleration signals
2016
2016 23rd Iranian Conference on Biomedical Engineering and 2016 1st International Iranian Conference on Biomedical Engineering (ICBME)
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The basis of the hearth beat frequency selection is the observed high harmonic content of movement artifact signals with respect to the PPG-derived heartbeat. ...
The algorithm, implemented in an experimental PPG measurement device, is developed by analyzing a set of PPG data recorded from a group of athletes exercising on a treadmill. ...
Acknowledgments This work was supported by the Spanish Consejo Superior de Deportes under CSD grants 03/UPB10/06, 01/UPB10/07, and 01/UPB10/08. S. M. ...
doi:10.1109/icbme.2016.7890946
fatcat:hv6g6mqpmbdtvgkmf5sik3qv2q
Page 935 of Journal of Applied Physics Vol. 28, Issue 9
[page]
1957
Journal of Applied Physics
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If a beam coupling structure is being used with the rebatron, one could first maximize the accelerated current as a first approximation and then further adjust a to give maximum power generated. ...
Ovrebo and secondly Mr. George A. Klingler, WCLRW-5 acting as Task Engineer. The author appreciates their faith in and encouragement of the work through many difficult phases. ...
In-press articles
2006
Journal of Allergy and Clinical Immunology
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However, techniques based on spectral analysis 72 will not be applicable to spectra that contain frequency bands close to each other. ...
We have used the Bland and Altman method to compare and evaluate the PPG signal. 35 The accuracy of the heartbeat measurement is better than ± 6.5 bpm (≤ 4.2 %) even under maximal exercise 36 conditions ...
When the PR peak is very close to a motion peak, the memory engine 298 helps to follow correct peak, but forcing the harmonic engine to act quickly. ...
doi:10.1016/s0091-6749(06)01444-8
fatcat:qbnisthsjrflho4ey242ifnuyi
Aero-engine Fault Diagnosis Based on Multilayer Perceptron BP Neural Network
2016
International Journal of Control and Automation
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We can diagnose and predict the fault type through obtaining and analyzing the vibration signals based on the fault characters of the aero-engine. ...
this algorithm has a certain practical value to the aero-engine fault diagnosis and prediction. ...
Maximizing H(z i ) will allow z i close to the uniform distribution on the interval [0, 1], which will also make the ψ i close to y i expected cumulative probability function. ...
doi:10.14257/ijca.2016.9.5.17
fatcat:nhcuway4tjdcbkhy2t6cn4ou2m
Page 4 of Mathematical Reviews Vol. , Issue 87a
[page]
1987
Mathematical Reviews
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Losco, Exterior forms and optimal control theory (pp. 373-378); Mitsuru Nakai and Leo Sario, The range of relative harmonic dimensions (pp. 379-384); Harold R. ...
These papers deepen our understanding of some of the long-standing research problems of differential topology-geometry and related fields, and their applications to the physical sciences and engineering ...
Page 2815 of Mathematical Reviews Vol. , Issue 83h
[page]
1983
Mathematical Reviews
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Let G denote.a compact connected Lie group and T a maximal torus
of G with Lie algebra g and Fourier algebra A(T). ...
[Theory and applications
in electrical engineering]
Third edition.
Wydawnictwa Naukowo-Techniczne (WNT ), Warsaw, 1981. 660 pp.
zt 182.00. ...
Notes
1942
Bulletin of the American Mathematical Society
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Interpolation and approximation to an analytic function by functions analytic and bounded in a region. II. Approximation to a harmonic f unction by functions harmonic and bounded in a region. C. G. ...
Nordling, Massachusetts Institute of Technology, June, minor in mechanical engineering, Solution by polynomial approximation of the integral equation for the circulation around an airfoil. ...
doi:10.1090/s0002-9904-1942-07671-3
fatcat:ns55anovhre3xfgwggszbz35b4
Gelfand pairs and spherical functions
1979
International Journal of Mathematics and Mathematical Sciences
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This is a summary of the lectures delivered on Special Functions and Linear Representation of Lie Groups at the NSF-CBMS Research Conference at East Carolina University in March 5-9, 1979. ...
and engineered systems. ...
which are homogeneous of degree m and the subrepresentation of G into E is irreducible. a linear non compact connected semisimple Lie group with finite center, and K is a maximal compact subgroup of G ...
doi:10.1155/s0161171279000168
fatcat:rt4o5kjjrvabna6zxgogpliejy
The Influence of Shunt Active Power Filter on Stability and Performance in Considering Time-Delay
2013
Mathematical Problems in Engineering
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Hence, this paper deals with the problems of solving the delay margin, the maximal delay which allows the closed-loop system to retain stable, and minimizing the performance index for a givenH∞controller ...
Finally, the relationships between the delay stability margin and some parameters have been investigated, and the performance index has been discussed in considering time-delay. ...
Mathematical Problems in Engineering ...
doi:10.1155/2013/345748
fatcat:pfmkfzlk35gkzjrcqiwhpsqhv4
Maximizing Influence-based Group Shapley Centrality
[article]
2020
arXiv
pre-print
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While the standard influence maximization problem is easy to approximate within a factor 1-1/e-ϵ for any ϵ>0, assuming common computational complexity conjectures, we obtain strong hardness of approximation ...
We model this optimization problem using the Group Shapley value, a well-founded concept from cooperative game theory. ...
Most of the centrality indices defined in the literature are based on graph-theoretical concepts and static graph properties like distance (closeness, harmonic, and degree), spectral (page-rank or Katz ...
arXiv:2003.07966v1
fatcat:6dr24ikfvjbrbi23zritfwxpkm
A CMOS V-I converter with 75-dB SFDR and 360-/spl mu/W power consumption
2005
IEEE Journal of Solid-State Circuits
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The new circuit utilizes a combination of cross-coupling and local resistive feedback for a significant, simultaneous suppression of the third-and fifth-order harmonic distortion components in the transconductor ...
The circuit occupies less than 0.02 mm 2 and dissipates 360 W. ...
For a harmonic input of the type , and after grouping of the frequency components, (1) can be rewritten in the form (2) From (1) and (2) , the goal of the linearization would be to design and parameterize ...
doi:10.1109/jssc.2005.847496
fatcat:62jc7nnpkbav7atbx2xeqoxqja
A seismic vertical vibrator driven by linear synchronous motors
2015
Geophysics
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A linear synchronous motor (LSM) is an electric motor that can produce large controllable forces and is therefore suitable as a driving engine for a seismic vibrator. ...
In contrast to hydraulic engines, the LSM performs equally well over the whole frequency range, making possible a smaller amount of signal distortion, especially at the low frequencies. ...
It was also supported by the Nederlandsche Aardolie Maatschappij and Deltares. ...
doi:10.1190/geo2014-0295.1
fatcat:cxbvhrhwqzbtrimdllffh5f3tu
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