电力系统中根据电压电流计算阻抗，其中使用半周积分算法计算电压电流的有效值-Power system voltage and current calculation based on impedance, in which the use of half integral algorithm of the RMS voltage and current

生物力学血管树计算阻抗，准确无误，-The biomechanics vascular tree calculation

改程序适应于电力系统短路电流计算，生成节点导纳矩阵和阻抗矩阵。-Change program suitable for power system short-circuit current calculation, to generate the node admittance matrix and the impedance matrix.