But while synchronization is primarily a concurrency control mechanism, transactions are primarily an exception-handling mechanism.
但是，当同步主要是并发控制的机制时，则事务主要是处理异常的机制。
The design transaction model and high concurrency control mechanism which guarantee correctness and consistency is the key in PDM.
解决PD M中对长周期设计事务的高度并发控制、保证设计数据的正确性和一致性是PD M中的关键技术。
The paper focused on concurrency control mechanism of mobile transactions and proposed a concurrency control strategy based on dynamic timer.
文中着重研究移动事务的并发控制机制，提出了一种基于动态计时器机制的并发控制策略。
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