Multi-Objective Optimization Of Timber Supply Chain Network In Nanping

Wood is the only renewable and recycled green material and biological resource among the four major materials（steel,cement,wood,plastic）in the world today.It has important economic and ecological values.This article is based on research and existing literature data,Studied the multi-objective optimization problem of wood supply chain network considering cost,carbon emission and resilience,and measured the resilience and carbon emission of the wood supply chain network of Nanping City;established a multi-objective optimization model;and embedded the resilience improvement strategy into the optimization model During the analysis,explore the impact of different resilience promotion strategies on different target values.It aims to provide theoretical guidance for building a stable and green economic timber supply chain and promote the sustainable development of Nanping’s timber industry.The results of the study are as follows:（1）Taking the timber supply chain network in Nanping City as the research object,planning the timber transportation route and timber flow assignment plan with the goal of minimizing the cost,and respectively measuring the resilience of the timber supply chain network and carbon emissions at this time.Based on the inoperability dynamic input-output resilience measurement model,the resilience measurement value is 0.961.At the same time,two sets of resilience strategies are set for comparative analysis.After the inventory value of the supply point is increased by two times,the resilience value increases to 0.972.In the network After adding the logistics center for transit,the resilience value further increased to0.987;the carbon emissions of the supply chain network during the least-cost route were 1603.42t CO₂,When planning the least cost path,the carbon emission of the supply chain network is 1603.42t CO₂,node processing carbon emissions were 224.48 t CO₂,and unit wood transportation carbon The discharge volume is 6.22kg/m³.（2）Measure the resilience of the Pareto optimal solution based on the cost and carbon emission multi-objective optimization model with the resilience measurement method.The Pareto optimal solution obtained involves five different network structures.Among them,network structure a2 is the better solution for cost and carbon emission targets.The cost is 12.3869 million yuan,the carbon emission is 1126.33 t CO₂,and the corresponding resilience value is 0.981.（3）Taking the different supply-demand ratio as the influencing factor to analyze the impact of the cost,carbon emission and resilience of the wood supply chain network,it is found that as the supply-demand ratio increases,the Pareto optimal curve shifts to the lower left,and the cost and carbon emission targets have been changed.There is more room for optimization,but the extent of the curve moving to the lower left as the supply-demand ratio increases,indicates that increasing the supply-demand ratio has limited optimization of cost and carbon emissions;as the supply-demand ratio increases,the resilience value also has a certain advantage.But the original network structure has not changed,so the degree of resilience is decreasing.（4）Embedding different resilience strategies into the supply chain network optimization model.At this time,the location and cost,carbon emissions,and resilience of the timber supply chain network will change.Among them the average cost and carbon emissions have the least impact.For the strategic inventory strategy,the change rate of cost value is 1.08%,the rate of change of carbon emissions is 8.05%,and the rate of change of resilience value is 0.44%;for the multi-source supply strategy that has the greatest impact on the change of mean resilience,the change rate of resilience value is 1.35%,The rate of change in cost value was 7.25%,and the rate of change in carbon emissions was 20.56%.（5）Comparing the resilience strategy embedded model with the classic three-tier network structure,the six resilience strategies have a certain effect on the resilience of the supply chain network,but the cost,carbon emissions and resilience values??of the classic supply chain network are all It is higher than the timber supply chain network;among them,the cost value of the multi-source supply strategy in the classic network structure increased by 0.93%,and the carbon emissions increased by 29.56%,indicating the great significance of the construction of the timber logistics center for the low-carbon economy.