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中文摘要：
针对目前协同设计中业务过程描述能力不足和柔性差等问题,从并发性、可伸缩性和协同性等五方面进行分析,提出了一种在空间上三维分布的Petri网建模方法.将组合、颜色和定时约束Petri网引入协同设计的流程建模之中,设计了协同设计下云工作流业务流程的HPN（hybrid Petri net）模型;运用随机Petri网的思想对协同设计各流程流转、工作效率等进行分析,详细分析了其性能指标,验证了模型的可达性,并从业务冲突及模型分解等方面提出了优化.
英文摘要：
For business processes, there are problems in collaborative design such as inadequate description and poor flexibility. By analyzing features in a cloud workflow model in terms of concurrency, scalability, collaborative, dynamic and compositability, a workfiow model of three-dimensional distribution in space is established. A Petri net with compositability, color and timing constraints is introduced into the process modeling. A hybrid Petri net （HPN） model is designed, which can dispose the cloud workflow business processes. Using the idea of stochastic Petri net, the process flow and efficiency are explained, performance of the model is analyzed. Reachability of the model is verified. An optimization scheme is proposed to deal with business conflicts and model decomposition.
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Integration technology of collaborative computing system over multiple virtual machines oriented for
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