Fuzzy Synthesis Evaluation Method for Position State of Blast Furnace Cohesive Zone Based on Entropy Weight Extension Theory
Chunhua Yang · Acta Automatica Sinica · 2015
As the position state of blast furnace(BF) cohesive zone is influenced by various complex factors, which have hierarchical and fuzzy characteristics, a two-stage fuzzy synthesis evaluation method based on entropy weight extension theory is proposed. Using the extension theory and entropy weight method, the membership matrixes and fuzzy weight vectors of the first-stage are determined for the first-stage fuzzy evaluation, which is based on the work of organizing and classifying the process data of BF. Then, after determining the second-stage fuzzy weight vector by utilizing the analytic hierarchy process(AHP), the membership matrix of the second-stage fuzzy evaluation is generated on the basis of the result matrixes of the first-stage fuzzy evaluation. Thus, the two-stage fuzzy evaluation of the position state of BF cohesive zone can be carried out with not only qualitative analysis with extension of matter-element but also quantitative calculation with correlation function of extension set theory. A case study of a 2 650 m3 steel plant is carried out to verify the proposed method. It can be seen from the verification that the proposed method can reflect the practical situation well.