针对上述问题，本文首先通过传输线理论建立了机车用电缆的分布参数模型，以及变频调速牵引电机的高频等效电路。
In allusion to the problems mentioned above, firstly, the paper models the distribution parameter circuit of the cable and the high frequency circuit of motor through the transmission theory.
在岩石导电模型的基础上，参考双侧向仪器刻度电路原理，设计出适用于复电阻率测井仪器的刻度电路，并给出用电路参数模拟不同地层的方法。
Based on the rock conductivity model and with reference to calibration circuit in the dual laterolog tool, designed is calibration circuits in the complex resistivity logging tool.
方法：（1）模型建立：以相关的电学参数模拟血液动力学参数，以电路图（电路模型）分析的方法建立血液动力学理论模型。
Methods: (1)Model establishment: The hemodynamic model based on electrical circuit analysis was established by simulating hemodynamic parameters with electrical ones.
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