interior-point method的用法和样例：
例句
- An interior point method is used to solve the multi-objective OPF.
并用与系统规模关系不大的内点法对模型进行求解。 - It converts the calculation of PoC to a nonlinear programming problem, which is solved by predictor corrector primal dual interior point method in this paper.
对直接求取电压崩溃临界点的零特征根法进行扩展，将临界点计算转化为非线性规划问题，并用预测校正原对偶内点法求解。
