An improved set pair analysis model for evaluation of dangerous degree of debris flow
Wang Ming-wu, Li Li, Juliang Jin · Ziran zaihai xuebao · 2009
The dangerous degree evaluation of debris flow is a foundation for the disaster control and engineering measures.However,the evaluation of dangerous degree of debris flow is a very complicate and uncertainty problem.An improved model for the dangerous degree evaluation using the theory of set pair analysis(SPA) was discussed in this paper.The basic principle is that the identical-different-contrary is defined by an approaching degree between the measured index values of sample and corresponding index of standard sets of the dangerous degree.A model for data mining in discrepancy coefficient using the concept of the fuzzy degree of connection was investigated during the procedure of SPA.And the useful data was mined between the sample and adjacent discussed grade.Then the relative membership degree to each grade was calculated,and the dangerous degree of debris flow was predicted quantitatively.The results from the application to practical example and comparisons with other methods are fairly good.And they also show that the improved method of SPA used to assess dangerous degree of debris flow is feasible and effective,and easy to operate.The proposed novel method also can be used to evaluate the other uncertainty engineering problems.