Research On Fuzzy Comprehensive Evaluation Method Based On Entropy Weight-Logarithmic Fuzzy Preference Programming

In China,thousands of safety accidents occur annually in the process of development,which cause numerous life fatalities and severe property loss,and the national security situation is facing unprecedented challenges.In order to prevent or decrease the occurrence of accidents,reduce the severity of the consequences,safety evaluation is a necessary method.The validity and rationality of the safety evaluation method affect the accuracy of the safety evaluation results.Based on this background,this study puts forward and applies a new safety evaluation method.As the objective of the safety evaluation is a multiple criteria problem,so the establishment of evaluation index system and calculation of the index weight are an important work.With the application of fuzzy mathematics in safety evaluation,this paper introduces logarithmic fuzzy preference programming(LFPP)method and entropy weight method to calculate the weights.By analyzing the advantages and disadvantages of two methods,the entropy weight-LFPP theory is proposed,then this new method and the fuzzy comprehensive evaluation(FCE)method are combined to establish a new fuzzy comprehensive evaluation model.In order to illustrate the effectiveness and rationality of the method,this paper takes the underground garage fire risk assessment as an example,and the analytic hierarchy process(AHP)and LFPP method are applied to calculate the importance of the underground garage fire risk index.Compared with the calculation process and results of the two methods,the validity of the results of the LFPP method is explained.Then the advantages and disadvantages analysis method shows that the proposed method is superior to the AHP in the decision process.At last,this new evaluation model is applied to assess the comprehensive emergency capacity of a chemical industrial park in Hefei.Firstly,the evaluation index system of comprehensive emergency capability of chemical industrial park is established by analyzing the influence index of the park.Then all indexes’ weights are calculated by the entropy weight-LFPP method.After that,this article uses the fuzzy comprehensive evaluation model to assess the overall security of the park and the evaluation result of the chemical plant is "good",and according to the results,some measures are proposed to improve the safety level of park.