Improved AHP–TOPSIS model for the comprehensive risk evaluation of oil and gas pipelines

A comprehensive and objective risk evaluation model of oil and gas pipelines based on an improved analytic hierarchy process(AHP)and technique for order preference by similarity to an ideal solution(TOPSIS)is established to identify potential hazards in time.First,a barrier model and fault tree analysis are used to establish an index system for oil and gas pipeline risk evaluation on the basis of five important factors:corrosion,external interference,material/construction,natural disasters,and function and operation.Next,the index weight for oil and gas pipeline risk evaluation is computed by applying the improved AHP based on the five-scale method.Then,the TOPSIS of a multi-attribute decision-making theory is studied.The method for determining positive/negative ideal solutions and the normalized equation for benefit/cost indexes is improved to render TOPSIS applicable for the comprehensive risk evaluation of pipelines.The closeness coefficient of oil and gas pipelines is calculated by applying the improved TOPSIS.Finally,the weight and the closeness coefficient are combined to determine the risk level of pipelines.Empirical research using a long-distance pipeline as an example is conducted,and adjustment factors are used to verify the model.Results show that the risk evaluation model of oil and gas pipelines based on the improved AHP–TOPSIS is valuable and feasible.The model comprehensively considers the risk factors of oil and gas pipelines and provides comprehensive,rational,and scientific evaluation results.It represents a new decision-making method for systems engineering in pipeline enterprises and provides a comprehensive understanding of the safety status of oil and gas pipelines.The new system engineering decision-making method is important for preventing oil and gas pipeline accidents.

Research on the Assessment System of Computational Mechanics Courses Based on the TOPSIS Entropy Weight Model

This paper takes the assessment and evaluation of computational mechanics course as the background,and constructs a diversified course evaluation system that is student-centered and integrates both quantitative and qualitative evaluation methods.The system not only pays attention to students’practical operation and theoretical knowledge mastery but also puts special emphasis on the cultivation of students’innovative abilities.In order to realize a comprehensive and objective evaluation,the assessment and evaluation method of the entropy weight model combining TOPSIS(Technique for Order Preference by Similarity to Ideal Solution)multi-attribute decision analysis and entropy weight theory is adopted,and its validity and practicability are verified through example analysis.This method can not only comprehensively and objectively evaluate students’learning outcomes,but also provide a scientific decision-making basis for curriculum teaching reform.The implementation of this diversified course evaluation system can better reflect the comprehensive ability of students and promote the continuous improvement of teaching quality.

传统村落文旅融合发展水平评价及影响路径

The integration of culture and tourism is conductive to the realization of urban-rural integration and rural revitalization.Taking 16 typical traditional villages in Beijing as cases,this study proposes an evaluation system and influencing factor model for the integration of culture and tourism in traditional villages.Based on the TOPSIS model supported by the entropy method,the level of culture and tourism integration in traditional villages is analyzed.Moreover,we discuss the main factors influencing the integration of culture and tourism in traditional villages and their paths by using fuzzy-set qualitative comparative analysis(fs/QCA).The results can be summarized in four main areas.(1) The integration of culture and tourism in traditional villages is a dynamic process that continues to promote the comprehensive revitalization by deepening resource integration,advancing product cultivation and strengthening industry functions.(2) There are obvious differences in the development levels of the integration of culture and tourism among the case villages.Specifically,the levels of each village in the four dimensions present the characteristics of differentiation and imbalance.(3) No single factor can capture the necessary and sufficient conditions for the integrated development of culture and tourism.(4) There are three paths influencing the integration of culture and tourism in traditional villages,namely,the mature development path,the rapid development path and the progressive development path,which correspond to their respective combinations of influencing factors.The results of this study can provide theoretical inspiration and scientific guidance for the urban-rural integration and rural revitalization of traditional villages from the perspective of the integration of culture and tourism.