检索结果-内蒙古大学图书馆

Localized relaxation theory of circuits and its applications in electro-thermal analyses

Science China(Information Sciences) 2012年第4期55卷 938-950页

作者： GORDON Joseph A. TAN Sheldon X.-D. Department of Electrical Engineering University of CaliforniaRiversideCA 92521USA

In the high-performance IC design with increasing design complexity,it is a very important design content to efficiently analyze IC ***,the electro-thermal (ET) analyses including power/ground (P/G) analysis and thermal analysis are hot topics in today's IC *** ET analysis equation has a sparse,positive definite and strictly diagonally dominant coefficient-matrix,we prove that the ET analysis has the advantage of *** to this advantage,localized relaxation method is formally proposed,which has the same accuracy as the global relaxation done with the constraint of the same truncation error *** on the localized relaxation theory,an efficient and practical localized successive over-relaxation algorithm (Lsor2) is introduced and applied to solve the following three ET analysis problems.(1) Single-node statistical voltage analysis for over-IR-drop nodes in P/G networks;(2) single-node statistical temperature analysis for hot spots in 3D thermal analysis;(3) fast single open-defect analysis for P/G networks.A large amount of experimental data demonstrates that compared with the global successive over-relaxation (sor) algorithm,Lsor2 can speed up 1-2 orders of magnitudes with the same accuracy in ET analyses.

关键词： integrated circuit electro-thermal analysis sor algorithm power/ground network

来源：评论

学校读者我要写书评

暂无评论

An sor Implicit Time-accurate Scheme in Calculating Unsteady Flows

引用

Chinese Journal of Aeronautics 2007年第3期20卷 202-209页

作者： LI Yue-jun YAN Chao School of Aeronautic Science and Engineering Beijing University of 4eronautics andAstronautics Beijing 100083 China

A new time-accurate marching scheme for unsteady flow calculations is proposed in the present work. This method is the combination of classical Successive Over-Relaxation （sor） iteration method and Jacobian matrix diagonally dominant splitting method of LUSGS. One advantage of this algorithm is the second-order accuracy because of no factorization error. Another advantage is the low computational cost because the Jacobian matrices and fluxes are only calculated once in each physical time step. And, the sor algorithm has better convergence property than Gauss-Seidel. To investigate its accuracy and convergency, several unsteady flow computational tests are carded out by using the proposed sor algorithm. Roe＇s FDS scheme is used to discritize the inviscid flux terms. Unsteady computational results of sor are compared with the experiment results and those of Gauss-Seidel, Results reveal that the numerical results agree well with the experimental data and the second-order accuracy can be obtained as the Gauss-Seidel for unsteady flow computations. The impact of sor factor is investigated for unsteady computations by using different sor factors in this algorithm to simulate each computational test. Different numbers of inner iterations are needed to converge to the same criterion for different sor factors and optimal choice of sor factor can improve the computational efficiency greatly.

关键词： unsteady flow sor algorithm sor factor Gauss-Seidel

来源：评论

学校读者我要写书评

暂无评论

sor AND MGR[V] EXPERIMENTS ON THE CRYSTAL MULTICOMPUTER

引用

PARALLEL COMPUTING 1987年第2期4卷 117-142页

作者： KAMOWITZ, D Institute for Computer Applications in Science and Engineering ICASE NASA Langley Research Center Hampton VA 23665 U.S.A.

This report describes distributed implementations of the red/black sor algorithm and of the MGR[ν] multigrid algorithm on the Crystal multicomputer. Rates of convergence and observed efficiencies for both algorithms ... 详细信息

关键词： Crystal multicomputer multigrid algorithm performance analysis sor algorithm

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：