Research On Network Optimization Of Closed Loop Supply Chain Considering Carbon Tax Policy

A series of negative problems such as global warming caused by the greenhouse effect have become increasingly prominent,making it a very urgent task for the government to control carbon emissions and promote sustainable development.The concept of "low-carbon supply chain management" that takes into account the balance between economy and environment is proposed in response to the government’s call for energy conservation and emission reduction,and provides a reasonable development direction for enterprises to achieve "low-carbon economy".The closed-loop supply chain network is a cross-complex system.The selection of raw materials,the manufacture of products,and the recycling of products will all generate carbon emissions,and there are many uncertainties in the network design process of the supply chain.impact on the performance of the supply chain.Therefore,how to study the design of closed-loop supply chain network under certain and uncertain environments from the perspective of low-carbon supply chain management is an important problem that enterprises need to face.Based on low-carbon supply chain management,this paper constructs a closed-loop supply chain network structure model considering carbon tax policy.First,the impact of carbon tax changes on network planning under the environment is analyzed and determined;then,considering the uncertainty of factory storage capacity and recycling quantity,the above problems are extended to uncertain environments,and the impact of carbon tax policies on closed-loop supply chains in stochastic environments is discussed.The role of site selection optimization;on this basis,considering the uncertainty of carbon tax rate,the impact of uncertain factors and product raw material differences on network performance is studied;finally,under the premise of the above research,the content of the article is discussed.Summary and outlook.The specific research process is as follows:First,in a certain environment,under the premise of a single product and a single transportation mode,a multi-objective planning model is established,and an improved catastrophe genetic algorithm is introduced to solve the model.From the calculation results,it can be seen that the change of carbon tax rate will affect the selection of alternative manufacturers.impact,and the total cost will gradually increase as the carbon tax rate increases.Secondly,under the multi-product and single transportation mode,the design of the closed-loop supply chain network under uncertainty is further studied.Considering the uncertainty of the number of products recovered and the storage capacity of manufacturers,a stochastic supply chain network optimization model is established,using the sample average A hybrid algorithm combining approximation method and genetic algorithm solves the two-stage linear programming model considering carbon tax policy.The analysis shows that the stochastic model is more effective than the deterministic model;the change of carbon tax will cause changes in corporate decision-making.According to the increase of carbon tax,companies will first add factories to maintain the normal operation of the enterprise,and then appropriately reduce the opening of factories to reduce the cost of site selection and operation;The total cost and carbon emissions first decreased and then increased with the increase of consumers’ preference for remanufactured products.Thirdly,under the multi-product and multi-transportation mode,a closed-loop supply chain stochastic programming model based on scenario analysis method is established,considering the market demand,recycling quality and the uncertainty of carbon tax in the closed-loop supply chain.Then,the uncertainty of the carbon tax rate is analyzed by using the box uncertainty set,considering the differences in carbon emissions of different raw materials,and the stochastic programming model is extended to an affine tunable robust optimization model that includes the uncertainty of carbon tax rate.The impact of the uncertainty set of carbon tax rates on closed-loop supply chain decision-making is analyzed,and the effect of raw material substitution rate on the total cost and carbon emissions of a low-carbon closed-loop supply chain is discussed.The results show that: the carbon tax policy can help the closed-loop supply chain reduce carbon emissions,but to a certain extent at the expense of increasing the total cost;changes in the level of uncertainty and the nominal value of carbon tax will affect the cost,carbon emissions and choice of transportation modes;The total cost and carbon emissions decrease as the level of raw material substitution increases;the increase in the proportion of low-carbon consumers will lead to a gradual increase in the total cost,while the carbon emissions will decrease significantly.Finally,the content analyzed in this paper is summarized from the perspective of low-carbon closed-loop supply chain,in order to provide decision support for promoting the effective design of closed-loop supply chain network,and to provide a reasonable and effective theoretical basis for the government to formulate emission reduction strategies for consumers.