Petri网及其维修建模应用研究

Petri网描述异步并发的能力和形象直观的图形表示，使之成为系统维修过程模型描述的有力工具。文章在对Petri网的基本概念、模型描述方法作简要介绍基础上，分别就不可修系统、可修系统、维修资源共享、维修优先级以及维修费用等维修过程问题，进行了Petri网模型描述。     

Traditional Chinese medicine diagnosis and evaluation of the clinical effect in post-hepatitic cirrhosis based on fuzzy analysis

In view of the problem of traditional Chinese medicine (TCM) diagnosis, fuzzy comprehensive evaluation is introduced to the diagnosis and evaluation of the clinical effect of hepatitis. A new diagnosis and evaluation model of the TCM clinical effect standard was presented. The old disputed evaluation model by subjective analysis can be displaced by this objective method in its evaluation system. The foundation of this method is the fuzzy diagnosis model. This method has been realized to diagnose hepatitis and its values in practice has been validated through examples of clinical syndromes of post-hepatitic cirrhosis.