Regarding the Petri net model,the solving method of main task line is addressed and the notion of concurrent segment is given.

Study on bench combination technology continuity in Heidaigou Open-pit Coal Mine;

Pathologic examination of chronic gastric ulcer with concurrent mycotic infection in 16 cases;

An efficient concurrent processing algorithm for continuous queries in spatio-temporal databases;

The Study of Concurrent Virtual Machine Based on Embedded Platform;

Transactional workflow concurrency control based on isolation spheres;

Study of concurrency programming pattern and pooled memory allocation using ACE;

Research and design of web service with concurrency technology;

This paper conducts a comprehensive research on how to solve parallel control in the actural application of DB, which leads to three main methods: comparative update, lock update and updated-word comparison.

The component-based software configuration management system should support parallel resource accessing.

The hardware architecture is simply described, and the request for parallel processing is analyzed, and then the details about the parallel processing mechanism of using multi-threads and multi-processes in HHA system is given.

A skill of samephore use in concurrence process;

But the program concurrence must bring the situation that several threads access the same critical resource simultaneously,so the key problem in concurrent system is how to manage and allot critical resources,in which we should pay attention to fairness and safety.

process concurrence is the fundamental problem when the operating system is designed.