最后，研究了系统中的并发控制机制问题。
In the end, the mechanism of concurrent control in the system is studied.
特定的并发控制机制因商业SDO实现而有所不同，但这超出了本文的讨论范围。
Specific concurrency control mechanisms vary across commercial SDO implementations and are beyond the scope of this article.
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。
The paper focused on concurrency control mechanism of mobile transactions and proposed a concurrency control strategy based on dynamic timer.
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