Study On Optimal Decision Models For Multiple Suppliers Under Multi-resource Combinations

As one of the most severe affected area, China suffered great losses from all kinds ofnatural disasters for a long period. With the objective of reduce disaster losses, recoveringthe social and economic order and ensuring the normal living condition of victims, centralgovernment and local authorities have made a great effort in disaster relief operation andmanagement, especially the emergency material reserves and allocation management.Most of the previous researches are all carried out without taking dynamic change in time(i.e. emergency material time-varying character), transportation capacity constrain andresponse time constraint, results in the gap between theory research and actual operationrequirement. While in reality, emergency material has a time-varying character in supply(i.e. supply character of emergency material will change in different relief operation phase,which is the main topic in this paper. So, starting with the supply character analysis inemergency material allocation research has more sense of realistic value.Based on related research achievements, this paper focused on the core of emergencylogistics operation in large-scale natural disasters, i.e. the material allocation modelconstructing and solving. With the summaries of the supply characters constraints optimaldecision models were established and computation algorithms were designed by feasiblesolution and optimum solution condition analysis The main topics in this paper are asfollowing：①With summaries in systemic structure of emergency logistics and analysis ofemergency martial allocation’s characters, a basic idea of systematic research in this paperwas proposed. In this idea, taking the earliest emergency response start time and theminimum number of relief material distribution center involved as bi-objective, theproblem was decomposed into time-varying supply-demand constrained problem andnon-time-varying supply-demand constrained problem in simple network and complexnetwork structure, with emergency response cost constrain, time constraint.②Ascheduling model based on the earliest emergency response time and the lowesttotal transportation cost is proposed according to the characteristics of multi-suppliers,multi-resource emergency and multi-objective scheduling problem. An algorithm formulti-objective decision using the ideal point method is proposed, which transforms themulti-objective decision into the single-objective programming question. Finally，anarithmetic example is followed to demonstrate the application and evaluate the feasibility and effectiveness of the method．③Multi-selection problem with time-varying supply constraint was studied. Firstly,the concept of critical response time was proposed. Based on the analysis of actual criticalresponse time, a multi-objective decision model for multi-R2DC selection withtime-varying supply was established with an optimized combinatorial algorithm, and newoptimized combinatorial algorithm designed.By studying the problems mentioned above，the decision-makers in disaster reliefoperation could be assisted to construct a systemic knowledge of emergency logistic andemergency material allocation，to gain intelligence supporting and decision-makingreference for emergency logistics operating effectively to guarantee emergency materialsupply．Thus，the total emergency management system may realize the relief objectiveswith the earliest emergency response start time and the minimum number of R2DCinvolved，decline the impact caused by large-scale paroxysm event and natural disasterson social life and minimize the total systematic loss on casualty and property...