After finishing the development flows including general purpose TUA ports design, UUT test points-instruments matching, switch network design and TUA engineering design, a general purpose TUA can be worked out automatically.

Each cluster consists of a numberofsub-clusters which areconnected by a switch network.

Through analyzing the power flow in a switch network,a calculation method and formula and its program block diagram of conductance ratio of every switch are put forward in this paper.

Logic modeling and algorithm of relay secondary circuit based on switching network;

This paper presented a method to get the minimum connection matrix from a generalized switching network.

Analysis of switched network by Fourier transform;

The main difficulty to analyze the switched networks is the nonlinearity, and the changing topological structure in period.

Adopted the model, the switched networks can be analyzed in time-domain with nodal approach and the case of inconsistent initial conditions resulted from the ideal switch model can be avoided.

In allusion to the inconsistent initial conditions and the presence of impulsive voltages and currents at the switching instants, a numerical method based on the differential nodal equations is presented for analyzing piece wise linear switched networks.

The division of the network of an E-government system into inner network, outer network and ferrying network by the network switch and the design of an information ferrying system to synchronize data between the inner and the outer bi-directionally is an effective measure.