iii ) for the semi-implicit spectral element method on the 2-d shallow water equations, we give a parallel mass-matrix-diagonal preconditioned cg method with the element-by-element strategy and develop the corresponding parallel software package . we also get high efficiency on pc clusters ?)研究了两维半隐谱元素浅水波模式的高效并行计算,给出了离散方程的逐元素(ebe)并行求解技巧,设计了相应的并行应用软件,并在pc机群上获得高效实现。
this paper puts forward a parallel simulation algorithm combining a local network and pvm parallel software . it partitions the circuit into a lot of ips by using the way of first dividing after sorting, then orders nodes of one lp according to the circuit relationship 本文提出的并行算法是基于局域网和并行软件pvm(parallelvirtualmachine)相结合的算法,利用先划分后排序的方式,把vhdl描述的电路分割成多个lp,对每个lp按先后顺序进行排序。
it includes parallel architectures, parallel software and parallel algorithm, etc . because the number of data in image processing is very huge, and the existence of convolution operation and matrix multiplication, it is possible that parallel algorithm design and implement can be used in image processing 并行处理技术领域非常广泛,包括并行体系结构、并行软件和并行算法等。由于图像处理过程中的数据量巨大,而且各种算法中大量卷积运算和矩阵乘法运算的存在,就为图像处理过程中的并行算法设计和实现提供了可能。
parallel processing technique deals with many aspects . it includes hardware technique, parallel architectures, parallel operating system, parallel languages, parallel compiler, parallel software, parallel algorithm, etc . but the current international situation is that the development of parallel algorithm is far more behind other architectures . the most dominating appearances are the lacks of corresponding software, the rational distributing of tasks, the communications and the synchronization 虽然使用范围很广,但目前国内外的并行算法应用研究明显地滞后于其体系结构的发展,许多方面尚处于探索阶段,技术上还不是很成熟,其中最主要的表现就是配套软件的欠缺,任务合理分配的问题和通信与同步的问题。
some crucial design principles, methods and techniques in petsc are highlighted . propose a general scheme for the parallelization of an unstructured mesh, including graph partitioning, data division and mesh managing, based on message passing programming style . propose a series of comprehensive considerations about how to achieve a well-designed, object-oriented and data-distributed parallel software ?从软件外在的功能组织、使用模式与内在的设计思想、实现技术及其因果关联性等多重角度出发,对petsc做了深入的分析探讨,尤其从源代码的层次,重点剖析了petsc的面向对象、中性数据结构、上下文环境、并行设计与通信等重要核心技术的实现方法及其对petsc使用模式和性能所产生的意义。