摘要：In order to address the applicability of the PPP project auction system in the current market, this paper studies the mechanism and related models of PPP projects under different capital structures and improved approach of selecting items only by price, using computer network systems and heuristic algorithms. The electronic reverse auction (ERA) of PPP projects under different capital structures under the diversified environment is established. This paper selects the traditional government procurement model as the reference group. The ERA of PPP projects under the computer network background and different capital structures was selected as the observation group, through the comparative analysis of the procurement cost, the negotiation time cost, the supplier selection range, the project construction efficiency, the project cost, and other aspects. The correlation and feasibility were also tested by a bivariate t test. The results suggest that the system automates PPP project selection, it can realize the optimization of each comprehensive level of the survey project, meet the procurement needs of different funds, improve the procurement efficiency, and reduce procurement costs; in the context of computer networks, the ERA of PPP projects under different capital structures can effectively save the cost of buyers and bidders and improve cost-saving efficiency. Different from the traditional auction mechanism, it is no longer an auction. Even shopping around can make the auctioneer or bidder get best interests. The ERA mechanism developed under the background of this new computer network provides new possibilities and impetus for the further development of the auction mechanism.
