By defining the activity node,the directed edge and the startup mode of activity,the directed graph based workflow model is designed.

In view of record and tracking the change of XML form-document,there is a new method of making working flow processing in working flow processing system as a activity node so as to check the situation of document changed automatically and store immediately,and reconstruct the version of XML form-document by the need of enterprise.

A standard modeling construct was to build active nodes, then modeling was constrained by the active nodes and process.

The scheme was implemented on the basis of the correctness and consistency of the information table where every active node-state was written and refreshed on time.

Diurnal time budget and activity rhythm of Alligator sinensis in the rutting season;

Diurnal activity rhythm and time budget of Lacerta vivipara in simulated habitat;

The ethogram and activity rhythm of capative Paa spinosa during breeding period;

However,it is very difficult to guarantee availability in P2P storage system because of peer churn.

This paper summarizes recent studies on the structure, function and activity adjustment of the spermathecae.