Early Warning of Surround-bidding and Forging-bidding in Sunshine Procurement Based on Clique-Grey Relation Analysis

The surround-bidding and forging-bidding in Sunshine Procurement is a complicated and hidden illegal behavior, which seriously destroys the principle of fairness and justice in the bidding process. In this paper, the bidding price is taken as the research perspective to build an early warning analysis model of surround-bidding and forging-bidding behavior of enterprises based on Clique-Grey Relation Analysis(C-GRA). It uses the community discovery to identify the community structure in the bidding enterprises, at the same time, it uses the grey relation analysis to mine the strong association between enterprise quotations, and establishes a comprehensive evaluation function to warn the abnormal behavior of surround-bidding and forging-bidding in the enterprise bidding. The numerical simulation shows that the C-GRA model can better identify the abnormal behavior of bidding enterprises.