一个不错的神经网络算法，采用bp算法，整个算法简单实用-a good neural network algorithm, the algorithm used bp, the entire algorithm is simple and practical

该系统利用BP回馈神经网络算法实现对安全评价样本的学习、测试，能够正确形成安全事故各个影响因子的权重值，并且将样本和评价结果保存在数据库中，通过预测的方法为安全评价提供了一种新的途径。-The system uses neural network BP algorithm back to the safety assessment of the learning sample, test, to correct safety-related incidents affecting the for

使用matlab编写的BP神经网络的算法，使用单隐层的网络，其中包括一个实例文件，对20个数据作分类。-Prepared using matlab algorithm BP neural network, using a single hidden layer networks, including an instance of the file, the data for 20 categories.

BP神经网络，改进后的高等算法它的学习规则是使用最速下降法，通过反向传播来不断调整网络的权值和阈值，使网络的误差平方和最小。- BP neural network algorithm improved its higher learning rule is to use the steepest descent method, through a reverse spread to constantly adjust the network weights and thresholds, s