System simulation and analysis using hierarchical event relationship graphs
用分层事件关系图实现系统仿真与分析*

Existing modeling languages, such as UML, finite state machine, Petri net and DEVS, cannot fully satisfy the needs of modeling timed systems in industrial practice. Enterprises are usually required to develop modeling languages and tools for their own, or to manually alter and abstract designs of timed systems to fit available modeling approaches.To a certain extent, this dilemma could be resolved by employing event relationship graphs and hierarchical designs.This method eased the design of complex timed systems, removing the obstacles of automatic simulation, analysis and code generation.