Networks´ equal system and its optimization

The equal network is often used to analyze some questions in theory. For example, Two-terminal network can be equivalent to a voltage source. It is suitable for multiterminal network. A kind of system is established by using the equal network. The system is verified correctly by some examples. The establishment of equal network involves the branch´s conductance and electromotive force (emf). The establishment of branch´s conductance is certain, because the number of nodes is equal to the number of the ends. But the establishment of the emf is not certain. Finally, the optimization of the equal network is introduced. The aim of the optimization is to make its internal power loss less and make both structure and parameter economical and reasonable.