文中以星型网格应用环境中独立任务周期性调度的研究成果为基础，通过分析网格平台分别处于非饱和态、临界态以及冗余态时的性质，提出了拓扑结构优化方法——静态优化与动态优化，给出了一种星型网格计算能力与资源利用率的度量方法; 在静态优化方面，解决网格拓扑结构最优化的判断问题，给出组建最优化星型网格的方法; 在动态优化方面，研究了网格拓扑结构动态变化时节点的准入策略; 还根据网格计算能力与动态负载的匹配情况，提出了网格拓扑结构动态优化算法．最后给出了网格平台的扩展策略．

Based on the periodic scheduling research of independent tasks on the star- based grid,a new topologyoptimization method including static and dynamic optimizations is proposed for the star- based grid by analyzing differentfeatures of grid platforms respectively in unsaturated,critical and redundant states,and a method to measure thecomputing capability and resource utilization of the star- based grid is put forward.Through the static optimization,the optimal grid topology structure is identified,and a method to build the optimal grid platform is presented.Through the dynamic optimization,the admittance strategies of a new node to the grid platform with the dynamictopology structure are discussed.Then,by mapping the computing capability to the dynamic loads,a dynamic opti-mization algorithm of grid topology structure is raised.Finally,the expansion strategy of grid platform is devised.