利用遗传算法优化BP神经网络权值和阈值，然后进行训练，利用训练好的模型进行预估。附实例-The use of genetic algorithm to optimize BP neural network weights and thresholds, and then training, training a good use of forecast models. Attached examples

matlab网络拓扑识别程序，前推回代法计算线损。-Forward and backward substitution flow calculation