This paper proposes a virtual service model, defines a virtual service composition calculus and gives a service dynamic selection algorithm.
文中提出了一种虚拟服务模型，在此基础上定义了虚拟服务的组合运算，给出了服务动态查找的算法。
A dynamic service composition model and select algorithm based on grid was presented.
提出了基于网格的动态服务组合模型与算法。
By constructing the example net of the target service, a decision theorem is proposed for BPEL composition process, and an algorithm is given to reduce the search space of services.
通过实例网的构建，给出了流程可组合性的判定定理，并提出减少服务搜索空间的算法。
By constructing the example net of the target service, a decision theorem is proposed for BPEL composition process, and an algorithm is given to reduce the search space of services.
通过实例网的构建，给出了流程可组合性的判定定理，并提出减少服务搜索空间的算法。
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