Application of GC-TOPSIS on optimizing choice of utilization programs of crop straw

Crop straw is an important biomass resource. The main utilization approaches for crop straw are converting to animal feed, fertilizer, fuel, material of edible fungi, and material of industry. In order to optimize the utilization approaches of crop straw, the evaluation indices are assigned based on information from references, which are measured by nine grade assignment. The combination weights method based on entropy and rank correlation analysis method is used to obtain the weights of evaluation index, and GC-TOPSIS (technique for order preference by similarity to ideal solution combined by grey correlation) serves as decision-making method. GC-TOPSIS method is a new kind of relative similarity degree by combining the Euclidean distance with grey correlation degree. At the same time, the optimization method provides foundation to scheme the various choices of utilization approaches in Heilongjiang province. Furthermore, the evaluation indices are assigned by information from the reference, which is practic