As an extension of the traditional signed digraph model, layered digraph models make hazard and operability analysis more thorough and systematic, which improves the capability of the expert system in identification of the potential safety hazards in the
As an extension of the traditional signed digraph model, layered digraph models make hazard and operability analysis more thorough and systematic, which improves the capability of the expert system in identification of the potential safety hazards in the
它拓展了传统的有向图模型，从而使危险和可操作性分析的结果更全面、更系统，提高了专家系统全面挖掘化工过程中潜在的安全危险问题的能力。