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本文采用三角不等式求得了有用功率的上确界,推导了正定情况下最优负载阻抗的一般公式,获得了半正定情况下的最优电流,指出其解的个数并不多于正定情况。
In this paper, the upper bound of the useful power is obtained by the triangular inequality. The general formula of the optimal load impedance under the positive definite circumstance is deduced. The optimal current under semi positive definite condition is obtained. The number of solutions is not more than positive definite case.