只含有电阻或受控源，不含独立源的一端口网络，想要求解其内部的等效电阻，分为纯电阻电路和含受控源电路两 类情况.对于纯电阻电路，本文提出了“打点找路”法求解; 对于含受控源电路，可分别用外接激励法和内接激励法求解.外接激 励法有经典的“加压求流”法和“加流求压”法; 对于内接激励法，提出了“开路短路”法这一新方法.

The one port network which only contains resistors or controlled sources，not including independent source，can be divided into pure resistors circuit and controlled sources circuits. As to pure resistors circuit，we propose a method of“searching roads by marking points”. As to the circuit with controlled sources，it can be resolvedby the external excitation method and internal excitation method. External excitation method includes the traditional method of “calculating current by inputting voltage”and“calculating voltage by inputting current”. As to internal excitation method，we also propose a new method named“open-short”.