The method not only makes it usable and even easy to build the network node voltage equations when the circuit has VCVS and CCVS sources or voltage sources without resistance,but also is more practical than the modified node method when there are more equations,and even neutral elements in the leading diagonal elements in the formula parameter matri.

Based on the theoretical analysis of the establishment of cut-set voltage equation,a more straightforward and simplified way has been proposed.

Dynamic and voltage equations describing the electromagnetic actuator s control over vibration system are derived.

The node voltage equation is written by replace a OP with a zero value element and in arbitrary value element.

Based on the charge conservation law, electrostatic field loop theorem and mathematic inductive methods, a set of zero-charged equations and a set of loop-voltage equations have been obtained and the independence between the two sets of equations has been verified, and thus the calculation problem of equivalent capacitance of the arbitrary passive two-end capacitance network has been solved.

Utilizing Kirchhoff s current law(KCL),Kirchhoff s voltage law(KVL) and mathematical tools, a set of node current equations and a set of loop-voltage equations have been obtained and the independence between the two sets of equations has been verified, thus the calculation problem of equivalent self-inductance coefficient of non-mutual-inductance-coupli.

The extended nodal voltage equation that only adapts to generalized Tellegen Theorem and was derived from the basic equation is presented, which is successfully applied to the actual power system for a generalized method of sensitivity calculation.