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Approximate Cyclic Reduction Preconditioning [chapter]

Arnold Reusken
1998 Lecture Notes in Computational Science and Engineering  
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

Xiao Hu, Chad Miller, Paul Vespa, Marvin Bergsneider
2008 Medical Engineering and Physics  
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]

Alexander N. Gorban, Andrei Y. Zinovyev
2008 Lecture Notes in Computational Science and Engineering  
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 and ViMiDa  ...  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

Mahdi Boloursaz Mashhadi, Mahmoud Essalat, Mohammad Ahmadi, Farokh Marvasti
2016 2016 23rd Iranian Conference on Biomedical Engineering and 2016 1st International Iranian Conference on Biomedical Engineering (ICBME)  
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  
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  
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

Wen Xinling, Chen Yu, Liu Zhaoyu
2016 International Journal of Control and Automation  
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  
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  
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.  ... 


1942 Bulletin of the American Mathematical Society  
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

Jean Dieudonné
1979 International Journal of Mathematics and Mathematical Sciences  
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

Tao Li, Yongqiang Liu
2013 Mathematical Problems in Engineering  
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]

Ruben Becker, Gianlorenzo D'Angelo, Hugo Gilbert
2020 arXiv   pre-print
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

S. Ouzounov, E. Roza, J.A. Hegt, G. van der Weide, A.H.M. van Roermund
2005 IEEE Journal of Solid-State Circuits  
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

Rik Noorlandt, Guy Drijkoningen, Johan Dams, Rob Jenneskens
2015 Geophysics  
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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