When the states of switches change, the method do partial network topology by using the layer relationships of models and can reduce the whole analysis time. 開(kāi)關(guān)狀態(tài)改變時(shí),還可以利用網(wǎng)絡(luò )模型間的層次關(guān)系,進(jìn)行局部網(wǎng)絡(luò )拓撲,減少了全網(wǎng)分析時(shí)間。