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An Adaptive Sine-cosine Moth-Flame Optimization Algorithm for Parameter Identification of Hybrid Active Power Filters in Power Systems

Yufan Wu, Rongling Chen, Chunquan Li, Leyingyue Zhang, Wanxuan Dai
2020 IEEE Access  
INDEX TERMS Sine cosine algorithm (SCA), moth flame optimization (MFO), swarm Global optimization, hybrid active power filter (HAPF).  ...  Hybrid active power filter (HAPF) is a novel technique of harmonic filter which combines superiorities of both active and passive filters.  ...  ACKNOWLEDGMENT (Yufan Wu and Chunquan Li contributed equally to this work.)  ... 
doi:10.1109/access.2020.3005717 fatcat:3xfziqwxljfvpdo3a7icrwn6ri

Hybrid Chebyshev function bases for sparse spectral methods in parity-mixed PDEs on an infinite domain

Benjamin Miquel, Keith Julien
2017 Journal of Computational Physics  
This paves the way for fast O(N N) and spectrally accurate mixed implicit-explicit time-marching of sets of linear and nonlinear equations in unbounded geometries.  ...  Even when these operators are not parity-preserving, we demonstrate how a mixed expansion in interleaved Chebyshev rational functions TB_n(y) and SB_n(y) preserves the sparsity of their discretization.  ...  Ian This appendix documents a method to obtain discretized matrices for operators composed of superpositions of powers of cosines, sines, and derivatives.  ... 
doi:10.1016/j.jcp.2017.08.034 fatcat:jxvuxzx7v5anhiookvim547bqi

Design, Validation and Correlation of Characterized SODIMM Modules Supporting DDR3 Memory Interface

Vemula Harini
2013 IOSR Journal of Electronics and Communication Engineering  
Characterized SODIMM module need to be designed to understand and analyze the impact of SODIMM parameters at higher speeds and thereby define more robust memory interface.  ...  In any computing environment, it is necessary for the processor to have fast accessible RAM that allows temporary storage of data.  ...  A.Taylor Series Approximation of Sine and Cosine Functions The Taylor expansions of sine and cosine of an angle "-" are given by sin ∝= ∝ − 3! −1 ∝ 3 + 5! −1 ∝ 5 − ⋯ cos ∝ = 1 − 2! −1 ∝ 2 + 4!  ... 
doi:10.9790/2834-0650111 fatcat:5forrex6lbdxhc7rnkzevdrawy

Dedalus: A flexible framework for numerical simulations with spectral methods

Keaton J. Burns, Geoffrey M. Vasil, Jeffrey S. Oishi, Daniel Lecoanet, Benjamin P. Brown
2020 Physical Review Research  
The Dedalus project is a flexible, open-source, parallelized computational framework for solving general partial differential equations using spectral methods.  ...  The performance of the code is evaluated with a parallel scaling benchmark and a comparison to a finite-volume code.  ...  We thank Eric Hester for helping to develop the general volume penalization methods used for magnetic levitation.  ... 
doi:10.1103/physrevresearch.2.023068 fatcat:rav6ayoeubeopm4gzo4p3yb4dq

Dedalus: A Flexible Framework for Numerical Simulations with Spectral Methods [article]

Keaton J. Burns, Geoffrey M. Vasil, Jeffrey S. Oishi, Daniel Lecoanet, Benjamin P. Brown
2019 arXiv   pre-print
The Dedalus Project is a flexible, open-source, parallelized computational framework for solving general partial differential equations using spectral methods.  ...  The performance of the code is evaluated with a parallel scaling benchmark and a comparison to a finite-volume code.  ...  We thank Eric Hester for helping to develop the general volume penalization methods used for magnetic levitation.  ... 
arXiv:1905.10388v2 fatcat:vmktpns5tfcojgm33vrkzinzce

DSP for MATLAB™ and LabVIEW™ I: Fundamentals of Discrete Signal Processing

Forester W. Isen
2008 Synthesis Lectures on Signal Processing  
To illustrate the generation of a growing complex exponential, we'll generate a cosine, sine pair having a frequency of 3 cycles over 240 samples, and which increases in amplitude by a factor of 1.  ...  parts which respectively define cosine and sine waves.  ...  (a) 2 samples (b) 4 samples (c) 8 samples (d) 17.5 samples (e) 3.75 samples For each of (a) through (e), devise a call to generate and plot the real and imaginary parts of a complex exponential having  ... 
doi:10.2200/s000161ed1v01y200811spr004 fatcat:3cwzmk7iuvdf7c23izrwpgcxoq

Mitigation of 50-60 Hz power line interference in geophysical data

M. B. Cohen, R. K. Said, U. S. Inan
2010 Radio Science  
Methods for estimating the time-varying frequency are also discussed. A few variants of these techniques are applied both to simulated data and then to real data.  ...  Removal of this interference is complicated by the time-varying fundamental frequency of power lines and strongly varying characteristics across different power grids.  ...  This work was supported under Office of Naval Research grant N00014-09-1-0100-P00003, and by National Science Foundation grant OPP-0233955 to Stanford University.  ... 
doi:10.1029/2010rs004420 fatcat:snb7blos6jejxdjsbrxxsaok7q

A quantum circuit simulator and its applications on Sunway TaihuLight supercomputer [article]

Zhimin Wang, Zhaoyun Chen, Shengbin Wang, Wendong Li, Yongjian Gu, Guoping Guo, Zhiqiang Wei
2020 arXiv   pre-print
As illustrative applications of the simulator, we present a quantum fast Poisson solver and an algorithm for quantum arithmetic of evaluating transcendental functions.  ...  It has the function of emulating the effect of noise and support more kinds of quantum operations. Second, our simulator is of high efficiency.  ...  The present work is financially supported by the National Natural Science Foundation of China (Grant No. 61575180, 61701464, 11475160) and the Pilot National Laboratory for Marine Science and Technology  ... 
arXiv:2008.07140v1 fatcat:7hmvdh6j4bd3nn4beduuyjmomm

A quantum circuit simulator and its applications on Sunway TaihuLight supercomputer

Zhimin Wang, Zhaoyun Chen, Shengbin Wang, Wendong Li, Yongjian Gu, Guoping Guo, Zhiqiang Wei
2021 Scientific Reports  
As illustrative applications of the simulator, we present a quantum fast Poisson solver and an algorithm for quantum arithmetic of evaluating transcendental functions.  ...  It has the function of emulating the effect of noise and support more kinds of quantum operations. Second, our simulator is of high efficiency.  ...  The present work is financially supported by the National Natural Science Foundation of China (Grant No. 61575180, 61701464, 11475160) and the Pilot National Laboratory for Marine Science and Technology  ... 
doi:10.1038/s41598-020-79777-y pmid:33432088 fatcat:zuz7pat2yza25nycfdghi2ct2a

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John P. Boyd
2012 Acta Applicandae Mathematicae - An International Survey Journal on Applying Mathematics and Mathematical Applications  
Singular perturbation methods, such as the method of multiple scales and the method of matched asymptotic expansions, give series in a small parameter ε which are asymptotic but (usually) divergent.  ...  In this survey, we use a plethora of examples to illustrate the cause of the divergence, and explain how this knowledge can be exploited to generate a 'hyperasymptotic' approximation.  ...  Acknowledgements This work was supported by the National Science Foundation through grant OCE9119459 and by the Department of Energy through contract KC070101.  ... 
doi:10.1023/a:1006145903624 fatcat:tkfmgemlend6xika2ss6comsvy

Fourth-Order Time-Stepping For Stiff PDEs On The Sphere

Hadrien Montanelli, Yuji Nakatsukasa
2018 SIAM Journal on Scientific Computing  
These are based on a variant of the double Fourier sphere method in coefficient space with multiplication matrices that differ from the usual ones, and implicit-explicit time-stepping schemes.  ...  A comparison is made against exponential integrators and it is found that implicit-explicit schemes perform best.  ...  We thank Grady Wright for a fruitful exchange of emails about multiplication matrices and for reading an early draft of this manuscript.  ... 
doi:10.1137/17m1112728 fatcat:fthvhg2xm5f4xew2ontvwk6nrq

Fourth-order time-stepping for stiff PDEs on the sphere [article]

Hadrien Montanelli, Yuji Nakatsukasa
2017 arXiv   pre-print
These are based on a variant of the double Fourier sphere method in coefficient space with multiplication matrices that differ from the usual ones, and implicit-explicit time-stepping schemes.  ...  A comparison is made against exponential integrators and it is found that implicit-explicit schemes perform best.  ...  We thank Grady Wright for a fruitful exchange of emails about multiplication matrices and for reading an early draft of this manuscript.  ... 
arXiv:1701.06030v4 fatcat:w5iknu7xprbkve4gz6whjgmmsq

Image Pre-Processing [chapter]

Scott Krig
2014 Computer Vision Metrics  
(Right) Fourier harmonic series of sine and cosine wavesArbitrary periodic functions can be synthesized by summing the desired set of Fourier basis functions, and periodic functions can be decomposed using  ...  The Fourier transform is bi-directional, between a periodic wave and a corresponding series of harmonic basis functions in the frequency domain, where each basis function is a sine or cosine function,  ... 
doi:10.1007/978-1-4302-5930-5_2 fatcat:afkxzgcm2vf4xbxozl23jwfyna

Algorithms for Quantum Systems - Quantum Algorithms [chapter]

Th. Beth, M. Grassl, D. Janzing, M. Rötteler, P. Wocjan, R. Zeier
2005 Quantum Information Processing  
The main tasks are to find methods for constructing good QECC and efficient algorithms for encoding and decoding, including the correction of the errors.  ...  . • Discrete cosine and sine transforms of types I, II, III, and IV [RB99, KR01, Röt02] . • Discrete Hartley transforms [KR00, Röt02] .  ... 
doi:10.1002/3527606009.ch1 fatcat:miu7yw6qtrdkrkrkiay5kyy6ru

Algorithms for Quantum Systems - Quantum Algorithms [chapter]

Th. Beth, M. Grassl, D. Janzing, M. Rötteler, P. Wocjan, R. Zeier
2005 Quantum Information Processing  
The main tasks are to find methods for constructing good QECC and efficient algorithms for encoding and decoding, including the correction of the errors.  ...  . • Discrete cosine and sine transforms of types I, II, III, and IV [RB99, KR01, Röt02] . • Discrete Hartley transforms [KR00, Röt02] .  ... 
doi:10.1002/3527603549.ch1 fatcat:4sshv4jhw5aq3fjnmqviyownvi
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