To realize and raise sharing property of database′s resource, it is necessary to introduce concurrent operation. But without control on the concurrent operation, it will result in a series of problems. This paper ana...To realize and raise sharing property of database′s resource, it is necessary to introduce concurrent operation. But without control on the concurrent operation, it will result in a series of problems. This paper analyses the causes leading to these problems with the example, and sets up Petri Nets models based on both trasaction control and activity control according to the characteristics of the Petri Nets to solve the problems.展开更多
文摘To realize and raise sharing property of database′s resource, it is necessary to introduce concurrent operation. But without control on the concurrent operation, it will result in a series of problems. This paper analyses the causes leading to these problems with the example, and sets up Petri Nets models based on both trasaction control and activity control according to the characteristics of the Petri Nets to solve the problems.
