system of nonlinear equations 基本例句 非线性方程组 The node current-injection model based power flow equations are nonlinear ones, which can be solved by gradient method to deal with multi-loop or multi-source network.文中的潮流方程是基于节点注入电流模型的非线性方程组,通过梯度法求解,可以解决具有多回路和多电源的配电网潮流。