According to the characteristics of flow field computation, this paper proposes an idea of DSV distributed shared variable and the asynchronous synchronous parallel algorithm, has a try to realize parallel flow field computation on parallel virtual machine using SPMD (single program multiple data) model, and gives the experimental r.

Based on ,it puts forward several programming language models of reactive systems,and mainly illustrates two programming languages by shared variables:transityion diagram and text language,describes their syntax and main mechanisms of communication between concurrent processes.

By using the LabVIEW shared variable,the system can exchange data across the network and relize remote control function.

This paper introduces a parallel processing architecture with distributed shared memory, which can preprocess remote sensing images with high efficiency.

In order to test and evaluate a shared memory based system of network of workstations, the parallel algorithm of Mandbrot set on both the environment of distributed shared memory system and that of distributed memory system is implemented.

A method of implementing a NVM system by simplifying the distributed shared memory management, which is used in our SNOW clustering system, is introduced.

Taking 7 well known parallel applications as examples, this paper studies the programmability and performance of PVM, a typical message passing system, and JIAJIA, a typical user level software distributed shared memory system, on the Dawning 1000A cluster system.