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

Complete codec LDPC code, It can be directly calculated multi-fractal spectrum, Is a two hidden layer back propagation neural network.