It is based on the concept of indefiniteadmittancematrix, and USES an algebraic method of symbolic code in the generation of symbolic network functions.
它利用了不定导纳矩阵的概念，在符号网络函数的产生中应用了代数法与符号编码相结合的方法。
2
With the rules, the nodal admittancematrix can be obtained by simple row and column transformations in the unconstrained indefinite-admittancematrix.