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传统的特征线法在用于求解无耗传输线时虽有简单的递归形式，且计算效率较高，但不能用于一般的有耗传输线．通过适当的参数修正后，导出了用于一般有耗均匀传输线递归形式的计算公式．该算法只需计算传输线两端的电流和电压，计算效率高且节省内存．从改进节点法出发，将该算法描述的时域模型等效为多端口器件，以此处理高速ＶＬＳＩ布线系统中的互连线，导出了其等效模型适用于改进节点法的构造方程，并设计了相应的布线系统通用模拟软件．数值实验结果表明，该模拟软件的通用性和数值精度均达到了较好的效果．
The traditional characteristic line method is simple recursive when it is used to solve the lossless transmission line, and its calculation efficiency is high, but it can not be used for the general lossy transmission line. After the correct parameters are modified, the formula for calculating the recursive form of a uniformly dissipative transmission line is deduced. The algorithm only needs to calculate the current and voltage at both ends of the transmission line, and the calculation is efficient and saves memory. Starting from the improved nodal method, the time-domain model described by the algorithm is equivalent to a multi-port device to deal with the interconnection lines in the high-speed VLSI wiring system. The equivalent equations are derived for the construction of the improved node method. Designed the corresponding wiring system simulation software. The experimental results show that the generality and numerical accuracy of the simulation software achieve better results.