期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
规格化对高斯消元法计算速度的影响 被引量:7
1
作者 刘单 万新儒 +1 位作者 彭丽君 陈恳 《南昌大学学报(理科版)》 CAS 北大核心 2015年第2期135-138,共4页
从计算原理和计算速度两个方面详细地分析比较规格化对求解线性方程组的高斯消元法在消元和回代过程中的影响,其中包括计算公式的变化、计算元素的计算次数、规格化元素的计算次数、计算所有元素所需的元素总数、对复数矩阵和实数矩阵... 从计算原理和计算速度两个方面详细地分析比较规格化对求解线性方程组的高斯消元法在消元和回代过程中的影响,其中包括计算公式的变化、计算元素的计算次数、规格化元素的计算次数、计算所有元素所需的元素总数、对复数矩阵和实数矩阵的计算速度的影响等内容的比较,并对IEEE-57、-118、-300节点系统进行编程比较计算。计算结果表明,高斯消元法中规格化的计算虽极为简单,且对回代环节的影响不大,但可以大大提高前代环节的计算速度,从而大大提高求解线性方程组的计算速度,尤其是对复数矩阵。该结论同样适用于电力系统等各个工程领域用高斯消元方法求解线性方程组。 展开更多
关键词 高斯消元法 规格化 线性方程组 导纳矩阵 阻抗矩阵 逆矩阵 电力系统
下载PDF
Calibration method of phase distortions for cross polarization channel of instantaneous polarization radar system 被引量:7
2
作者 Huanyao Dai Yuliang Chang Dahai Dai Yongzhen Li XuesongWang 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2010年第2期211-218,共8页
A novel polarimetric calibration method for new target property measurement radar system is presented. Its applica- tion in the real radar system is also discussed. The analysis indicates that instantaneous polarizati... A novel polarimetric calibration method for new target property measurement radar system is presented. Its applica- tion in the real radar system is also discussed. The analysis indicates that instantaneous polarization radar ([PR) has inherent cross-polarization measurement error. The proposed method can effectively eliminate this error, and thus enhance the polarization scattering matrix (PSM) measurement precision. The phase error caused by digital receiver's direct IF sampling and mixing of two orthogonal polarization channels can be removed. Consequently, the inherent error of target polarization scattering measurement of the instantaneous polarization radar system is well revised. It has good reference value for further ploarimetric calibration and high practical application prospect. 展开更多
关键词 instantaneous polarization radar target scattering ma- trix (PSM) polarization measurement polarimetric calibration.
下载PDF
Exponential synchronization of complex dynamical networks with Markovian jumping parameters using sampled-data and mode-dependent probabilistic time-varying delays 被引量:2
3
作者 R.Rakkiyappan N.Sakthivel S.Lakshmanan 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第2期49-63,共15页
In this paper, the problem of exponential synchronization of complex dynamical networks with Markovian jumping parameters using sampled-data and Mode-dependent probabilistic time-varying coupling delays is investigate... In this paper, the problem of exponential synchronization of complex dynamical networks with Markovian jumping parameters using sampled-data and Mode-dependent probabilistic time-varying coupling delays is investigated. The sam- pling period is assumed to be time-varying and bounded. The information of probability distribution of the time-varying delay is considered and transformed into parameter matrices of the transferred complex dynamical network model. Based on the condition, the design method of the desired sampled data controller is proposed. By constructing a new Lyapunov functional with triple integral terms, delay-distribution-dependent exponential synchronization criteria are derived in the form of linear matrix inequalities. Finally, two numerical examples are given to illustrate the effectiveness of the proposed methods. 展开更多
关键词 complex networks exponential synchronization mode-dependent time-varying delays linear ma- trix inequalities sampled-data control
下载PDF
LEAST-SQUARES SOLUTION OF AXB = DOVER SYMMETRIC POSITIVE SEMIDEFINITE MATRICES X 被引量:18
4
作者 AnpingLiao ZhongzhiBai 《Journal of Computational Mathematics》 SCIE CSCD 2003年第2期175-182,共8页
Least-squares solution of AXB = D with respect to symmetric positive semidefinite matrix X is considered. By making use of the generalized singular value decomposition, we derive general analytic formulas, and present... Least-squares solution of AXB = D with respect to symmetric positive semidefinite matrix X is considered. By making use of the generalized singular value decomposition, we derive general analytic formulas, and present necessary and sufficient conditions for guaranteeing the existence of the solution. By applying MATLAB 5.2, we give some numerical examples to show the feasibility and accuracy of this construction technique in the finite precision arithmetic. 展开更多
关键词 Least-squares solution Matrix equation Symmetric positive semidefinite ma- trix Generalized singular value decomposition.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部