Marked Graph Method of Knowledge Representation 知识表示的标志图法
The corresponding Petri net model is structured starting from N state of databse system at t moment, and then a reachable marked graph is structured in this paper. 本文从数据库系统在时刻t的状态N出发,构造出相应的Petri网模型,进而构造出其可达标识图。
When the result of the 7th pair of the patients was marked on the sequential graph, the trial line touched its upper border line. 当试验进行到第7对病人时,试验线触及序贯试验图上边界线。