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中文摘要：
针对Web服务组合过程缺乏有效的性能评价方法的问题,提出一种利用广义随机Petri网（GSPN）进行组合过程建模的方法,该方法能够表达组合过程,并对组合过程所含的增值业务系统进行多方面的系统性能评价,可实现的评价指标包括系统平均响应时间、单一组件服务的利用率、系统的吞吐率等,将其应用于一个典型的旅行计划场景建模中。仿真实验结果表明,建模后的系统能进行多种性能评价。
英文摘要：
Aiming at the problem that Web service composition process lacks effective performance evaluation approach, an approach is presented to construct the model of Web service composition process based on Generalized Stochastic Petri Net（GSPN）. Through the approach, the value-added service system constructed by service composition process can be described effectively, and furthermore, the quantitative analysis can be actualized. The metric items of system performance include the average response time, the usage ratio of the certain component service, the throughput of the system, etc. The approach is illustrated by constructing a model of the representative service composition application scenario. Simulation experimental results show the multiform performance evaluations can be made based on the system after being modeled.
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