一种基于改进遗传规划洪灾损失高精度的综合评价方法.pdfVIP

Journal of Ocean University of China (Oceanicand Coastal Sea Research) ISSN 1672-5182, October 30, 2006, Vol.5, No.4, pp.322-326 http: // www. ouc. edu. cn/xbywb/ E-maih xbywb@ouc edu. cn A High Precision Comprehensive Evaluation Method for Flood Disaster Loss Based on Improved Genetic Programming ZHOU Yuliang 1)* , LU Guihua 1), JIN Juliang 2), TONG Fang 1), and ZHOU Ping 1~ 1 ) College of Water Resources and Environment, Hohai University, Nanjing 210098, P.R. China 2) College of Civil Engineering, Hefei University of Technology, Hefei 230009, P. R. China (Received March29, 2006; accepted August25, 2006) Abstract Precise comprehensive evaluation of flood disaster loss is significant for the prevention and mitigation of flood disasters. Here, one of the difficulties involved is how to establish a model capable of describing the complex relation be- tween the input and output data of the system of flood disaster loss. Genetic programming (GP) solves problems by using ideas from genetic algorithm and generates computer programs automatically. In this study a new method named the evalua- tion of the grade of flood disaster loss (EGFD) on the basis of improved genetic programming (IGP) is presented (IGP- EGFD). The flood disaster area and the direct economic loss are taken as the evaluation indexes of flood disaster loss. Obvi- ously that the larger the evaluation index value, the larger the corresponding value of the grade of flood disaster loss is. Con- sequently the IGP code is designed to make the value of the grade of flood disaster be an increasing function of the index val- ue. The result of the application of the IGP-EGFD model to Henan Province shows that a good f