After studying conditions for generating PODCM in the critical path of data flow graph (DFG), an algorithm was introduced to produce PODCM.

通过分析在数据流图(DFG)关键路径上生成PODCM的条件，给出了在DF G关键路径上生成PODCM的算法并建立了PODCM库。

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The result is that the delay-Jitter-SPF algorithm and the flow graph of the building of the multicast tree with QoS constraints are proposed.

结果是提出了基于延迟和延迟抖动约束的SPF算法，并给出了完整的建立组播树的流程图。

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The algorithm is based on the principle of flow graph theory and set theory.

该算法基于流图理论的基本原理和简单的集合运算，概念明确，易于掌握；

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