Entropy weight fuzzy matter element method for sewage treatment process comprehensive evaluation

Abstract

The invention relates to an entropy weight fuzzy matter element method for sewage treatment process comprehensive evaluation, belonging to the field of optimization of sewage treatment technology. The method comprises the following steps: step I: a sewage treatment process fuzzy matter element model is built, comprising building of a compound fuzzy matter element, building of preferred membership degree fuzzy matter element, and building of a standard fuzzy matter element and a difference square compound fuzzy matter element; step II: the weight of an evaluation index is calculated by an entropy weight method, comprising construction of judgment matrix, normalization calculation, entropy definition and entropy weight definition of n evaluation indexes of m sewage treatment processes; step III: the optimal sewage treatment process is determined and an European style approach degree compound fuzzy matter element is built. In the invention, matter element theory is used as an evaluation tool for sewage treatment process, good evaluation to the sewage treatment process is realized, interference of artificial subjective factors is avoided in the whole calculating process, the objectivity for realizing weight calculation is realized to the maximum extent, and an evaluation decision method is clear in concept, and is visual, so that the computer programming is realized easily.

Description

technical field [0001] The invention relates to an entropy-weighted fuzzy matter-element method for comprehensive evaluation of sewage treatment technology, belonging to the field of sewage treatment technology optimization, which is applied to the optimization of sewage treatment technology in the early stage of sewage treatment plant construction, and provides technical support for decision makers; it can also be applied Comprehensive evaluation during the operation of the sewage treatment process to achieve the best operation of the sewage treatment plant. Background technique [0002] (1) Comprehensive evaluation and optimization method of sewage treatment process [0003] The selection of sewage treatment process is a systematic project, involving many factors, and there are many kinds of sewage treatment processes used in actual projects. The treatment processes adopted by each sewage treatment plant are different, and the selection of treatment processes is largely I...

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Problems solved by technology

[0004] The selection of sewage treatment process has many characteristics such as multi-indicator, fuzziness, incompatibility, etc. According to domestic and foreign literature reports, there are many methods for comprehensive evaluation of sewage treatment process, and the commonly used methods are fuzzy comprehensive evaluation method and multi-objective fuzzy evaluation method. Decision-making method, gray relational analysis method and analytic hierarchy process, etc., but there is still no generally accepted decision-making model

An important issue involved in the comprehensive evaluation of sewage treatment processes is the determination of index weights, but most of the weights of evaluation methods rely on subjective methods to determine the weights, which requires decision makers and workers to have a deep understanding of the problem, and increase the weight of the entire evaluation process. The intervention of subjective factors affects the objectivity of evaluation or selection

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