采用本发明方法，可降低系统耦合度，当一个子任务的进程崩溃时，不会 影响整个任务的执行，提高了系统运行效率。
The method can decrease coupling degree of system, when a course of sub-task is collapsed, execution of integral task can not be affected, and running efficiency of system is increased.
在协议管理器的设计上，使用了前摄器模式和抽象工厂，增加整个系统的扩展性并降低了模块之间的耦合度。
For the design of protocol manager, we use the Proactor Pattern and abstract factory to increase the scalability of the system and reduce the coupling degree between modules.
设计了从四个方面来降低远程调用系统耦合度的方案，并给出了实现方法。
I design the scheme to loosen the remote invocation coupling from four aspects, and show how to achieve these coupling.
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