通过拓扑链回归概念，在非紧致度量空间中引入一类特殊的流———非紧致流，同时给出该类流的一些特性和实例。

According to the concept of topological chain recurrent, a special flow "non-compact flow" is introduced on metric space, some properties and examples of this flow are given.

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在此拓扑视图中，ARM调用链以图形形式重现，这与通过IBM WebSphere Integration Developer开发的场景一致(请参见图1)。

In this topology view, the ARM invocation chain is reproduced in a graphic form, which is consistent with the scenario developed by IBM WebSphere Integration Developer (see Figure 1).

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主要讨论了通信网络的拓扑结构、通信链路控制及通信软件设计等问题。

Topology construction of communication network, line control of communication and the software design are mainly discussed.

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