ILL-CONDITIONING

作品数：7被引量：13H指数：2
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Parallel Perturbed Gauss-Newton State Estimator Based on Fortescue Transformation for Unbalanced Power Systems
《Journal of Modern Power Systems and Clean Energy》2022年第6期1778-1783,共6页Izudin Džafić 
supported by MONKS,Sarajevo,FBiH,Bosnia and Herzegovina(No.27-02-11-41250-34/21).
This letter extends the complex-variable perturbed Gauss-Newton method to estimate the state of unbalanced power systems by exploiting the Fortescue transformation.It proposes a novel and efficient graph-based way to ...
关键词：Delta-windings Fortescue transformation iterative algorithms least-squares approximation parallel algorithm perturbation methods ILL-CONDITIONING state estimation symmetrical components 
Numerical simulation of squeezing Cu-Water nanofluid flow by a kernel-based method
《International Journal of Modeling, Simulation, and Scientific Computing》2022年第1期175-191,共17页Mojtaba Fardi Yasir Khan 
The main aim of this paper is to propose a kernel-based method for solving the problem of squeezing Cu–Water nanofluid flow between parallel disks.Our method is based on Gaussian Hilbert–Schmidt SVD(HS-SVD),which gi...
关键词：Nanofluid flow Hilbert-Schmidt SVD ILL-CONDITIONING well-conditioning 
A ROBUST INTERIOR POINT METHOD FOR COMPUTING THE ANALYTIC CENTER OF AN ILL-CONDITIONED POLYTOPE WITH ERRORS
《Journal of Computational Mathematics》2019年第6期843-865,共23页Zhouhong Wang Yuhong Dai Fengmin Xu 
The authors would like to thank two anonymous referees for their valuable comments and suggestions.The author Yu-hong Dai is supported by the Chinese Natural Science Foundation(Nos.11631013,71331001 and 11331012);the National 973 Program of China(No.2015CB856002);The author Fengmin Xu is supported by the Chinese NSF grants(Nos.11571271,11631013 and 11605139).
In this paper we propose an efficient and robust method for computing the analytic center of the polyhedral set P={x€R^n|Ax=b,x>0},where the matrix A€ Rm×n is ill-conditioned,and there are errors in A and b.Besides o...
关键词：ANALYTIC center ILL-CONDITIONING Unboundedness PRIMAL-DUAL INTERIOR point algorithm Convergence Polynomial complexity 
N4SID and MOESP Algorithms to Highlight the Ill-conditioning into Subspace Identification被引量：4
《International Journal of Automation and computing》2014年第1期30-38,共9页Slim Hachicha Maher Kharrat Abdessattar Chaari 
supported by the Ministry of Higher Education and Scientific Research of Tunisia
In this paper,an analysis for ill conditioning problem in subspace identifcation method is provided.The subspace identifcation technique presents a satisfactory robustness in the parameter estimation of process model ...
关键词：Subspace identification ILL-CONDITIONING oblique projection orthogonal projection algorithms numerical subspace state space system identification (N4SID) multivariable output error state space model identification (MOESP) induction motor 
Robust Sensor Bias Estimation for Ill-Conditioned Scenarios被引量：7
《Tsinghua Science and Technology》2012年第3期319-323,共5页Xiongjie Du Yue Wang Xiuming Shan 
Sensor bias estimation is an inherent problem in multi-sensor data fusion systems. Classical methods such as the Generalized Least Squares （GLS） method can have numerical problems with ill-conditioned sets which are...
关键词：data fusion sensor bias estimation ILL-CONDITIONING 
Solving ill-conditioning observation equations via truncated SVD被引量：2
《中国有色金属学会会刊：英文版》2005年第S1期142-144,共3页GUI Qing-ming~1, GUO Jian-feng~(1, 2) (1. Institute of Science, Information Engineering University, Zhengzhou 450001, China 2. Institute of Geodesy and Geophysics, Chinese Academy of Science, Wuhan 430077, China ) 
Project Supported by the National Natural Science Foundation of China for Distinguished Yound Scholars of China (40125013) ; NationalNatural Science Foundation of China (40074006 , 40274001) ; Natural Science Foundation of Henan Province , China (004051300 ,0211051100)
To mitigate the ill effects and obtain more accurate and stable solution of the observation equations, the so-called truncated singular-value decomposition (TSVD) method is introduced by modifying the small (nonzero) ...
关键词：ILL CONDITIONING condition number TRUNCATED SVD 
Simulated annealing algorithm for ill-posed or ill-conditioning deconvolution problem
《Chinese Journal of Acoustics》1996年第2期141-151,共11页WANG Yingmin MA Yuanliang LIU Jianmin and Philip R. Atkins (Institute of Acoustic Engineering, Northwestern Polytechnical University Xi’an 710072) (School of Electronic & Electrical Engineering The University of Birnimgham, Birmingham B15 2TT, U.K.) 
A simulated annealing deconvolution technique dealing with the ill-posed and ill-Conditioning problems is presented. Following a survey about direct and iterative deconvolution techniques, the simulated annealing appr...
关键词：Annealing algorithm DECONVOLUTION 
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