This paper analyses the geometric significance of improved Coates Graph and gain formula and introduces a method to obtain the flow graph directly from network. A comparison is made by the author between the improved Coates Graph and Mason Graph.

• 本文对改进的Coates图及增益公式的几何意义进行了分析,并介绍了直接从网络获得流图的方法,同时与Mason图进行了比较。