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pvt算法
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  pvt algorithm
     A Modified PVT Algorithm
     一个修正的PVT算法(英文)
短句来源
  相似匹配句对
     PVT Asynchronous Algorithm
     异步PVT算法
     The algorithm is an extension of the two-valued cover-most algorithm proposed by M. C.
     该算法是M. C.
短句来源
     A Modified PVT Algorithm
     一个修正的PVT算法(英文)
短句来源
     in the algorithm;
     算法简单易行。
短句来源
     Study of the pVT of Aliphatic Liquids by an Improved GeneticBased Neural Network
     基于改进的遗传算法神经网络对链烷烃pVT性质的研究
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  pvt algorithm
This paper studies performance of the parallel variable transformation (PVT) algorithm for unconstrained nonlinear optimization through numerical experiments on a Fujitsu VPP500, one of the most up-to-date vector parallel computers.
      
Special attention is paid to a particular form of the PVT algorithm that is regarded as a generalization of the block Jacobi algorithm that allows overlapping of variables among processors.
      


A modification of the PVT (parallel variable transformation) algorithm, due to Pukushima (1998), is presented in this paper, in which stopping criteria using in the parallel and the synchronous steps are modified. It is more general in structure than the one in the PVD algorithm due to Solodov (1997) [6], in the synchronous step. The modified algorithm with stopping conditions weaker than the ones used in the original PVT algorithm is more suitable for parallel computation, and the computational time is less...

A modification of the PVT (parallel variable transformation) algorithm, due to Pukushima (1998), is presented in this paper, in which stopping criteria using in the parallel and the synchronous steps are modified. It is more general in structure than the one in the PVD algorithm due to Solodov (1997) [6], in the synchronous step. The modified algorithm with stopping conditions weaker than the ones used in the original PVT algorithm is more suitable for parallel computation, and the computational time is less than the original PVT algorithm.

对Fukshima(1998)所提出的PVT算法给出一种修正算法,称为修正PVT算法.这一修正算法对PVT原算法中的并行步中的停止准则和同步步骤作了修正.修正PVT算法的停止条件比PVT原算法的停止条件弱,因此更适用于并行计算,并且计算时间比PVT原算法少.

In this paper,we proposed an asynchronous execution for parallel variable transformation(PVT)algorithm which was for unconstrained optimization.We employed PVD-direction to construct the transformation matrix and obtained a specified PVT algorithm in which we need not to wait between processors.Also we obtained the linear convergence rate which was independent of the number of processors which cannot be obtained in[1].

在这篇文章里,我们对Fukushima提出的关于无约束优化问题的PVT算法作了改进,提出利用PVD算法中的PVD-方向来构造的PVT-变换矩阵,得到一个更适合于异步执行的PVT算法,从而减少各处理机之间的等待时间,提高并行机的并行效率.文中证明算法具有线性收敛速度,且其线性收敛比与处理机个数无关,该结果改进了中的结果,更适合于并行计算.

>=We present a special PVT algorithm through using the PVD-direction toconstruct the PVT-transformation matrix on basis of the PVT algorithm which wasput forward by Fukushima in 1998 and we prove the convergence of the algrithm.The new algorithm adapts to asynchronous parallel so as to reduce the waiting timebetween processors and save the execution time of the algorithm.

利用PVD 算法中的PVD-方向来构造PVT-变换阵,得到一个特殊的PVT算法,并且证明了算法的收敛性.同时对Fukushima于1998年提出的PVT算法作了修改,使其更适合于异步并行执行,从而大大减少了各处理机之间等待的时间,提高并行机的并行效率.

 
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