Projection Pursuit Model for Evaluating Grade of Flood Disaster Loss
评估洪水灾情等级的投影寻踪模型

In order to test the grade criterions of flood disaster loss, to resolve the non-uniformity problem of evaluation results of disaster loss indexes, and to raise the grade resolution of flood disaster loss, a new model-projection pursuit (PP) model is suggested for evaluating the grade model of flood disaster, where the disaster loss grade is real number. A scheme of PP modeling is also presented to reduce the computational amount, a new function of projection indexes is given, and it is suggested that both the function of projection indexes and the parameters of PP model can be optimized by using a real coding based genetic algorithm. The calculation example shows that the scheme is effective and general, which can be applied to evaluation of many natural disasters.