现货市场存在下的副产品合约交易策略优化

Decision optimization on the contract exchange of by-product with the physical market

副产品交易是组成副产品交换网络的基本单元,对循环利用具有重要意义.该文选取"单一产生企业—单一利用企业"废弃利用链,在存在原生材料合约市场和现货市场、消费者对再生品和新品无需求偏好的条件下,利用期望-方差效用函数,对副产品交易双方的最优合约供应量和采购量进行了决策优化;然后利用合约量和现货量间的关系建立了一个合约和现货双市场的副产品交易决策模型,并对副产品合约交易条件进行了经济性分析;最后通过案例,对模型进行了应用,为相关企业的决策提供理论依据.

The exchange of by-product is the basic unit of by-product exchange network.It has great significance to the recycling use.In this paper,a waste chain,which was made up of a single enterprize generating by-products and a single enterprize utilizing them,was analyzed with the virgin materials physical market and contract market,and no need preference between the new products and the products made by by-products.Firstly,the variance expected utility function was used to determine the optimal product contract units.Then,a trading model of two markets（contract market and physical market） was established,with the relation between the contract units and physical units.And the economic conditions for contract transactions were discussed.At last,a case was provided to validate the model,in order to offer a theoretical basis for the enterprizes,which exchanges by-products,to make their production decisions.