DDN网路技术及其在我国的发展研究

介绍ＤＤＮ的发展历程和国外现状，详述ＤＤＮ的特点、复用方式及网路结构，结合我国国情和当前ＤＤＮ的发展对未来ＤＤＮ的建设进行了探讨。指出我国ＤＤＮ应采用全国骨干网和省市区域网两级结构，抓紧制定全国发展规划；当前区域性ＤＤＮ建设应注意必要的条件，并考虑网间协调，以便进入今后的全国网。

Optimization of fault management system in power plants based on DD-RCM and TPN

A method of optimizing the fault management system in power plants based on DD-RCM （resultchain based modeling for digital developing） and TPN （temporal Petri net） is proposed. First, the model of the fault management system was set using DD-RCM. Then, it was transformed to the temporal Petri net model by corresponding rules. Secondly, relationships among all the activities, such as choice, conflict, synchronization and concurrency, were confirmed according to the Petri net model and described employing the reengineering algorithm of incidence matrix. Thirdly, the Petri net model was reduced by combining reduction rules and conflict, synchronization relationships to optimize the fault management system in power plants. Finally, the functionality of the reduced net was proved by the temporal logic of the temporal Petri net.

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