Quick response research conducted by social scientists in the aftermath of a disaster can reveal important findings abou......

选取旱，涝，震灾害之间的一步转移概率作为Ｂ－Ｐ人工神经网络训练样本的输入信息，建立了四川旱，涝，震的人工神经网络灾型预测模型。Ｂ－Ｐ网络模型应......