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Research on Two-stage Scheduling of Emergency Material

Author: MaXiang
Tutor: ChangChunGuang
School: Shenyang University of construction
Course: Management Science and Engineering
Keywords: Emergency supplies Scheduling model Demand priority Genetic Algorithms
CLC: F224
Type: Master's thesis
Year: 2011
Downloads: 139
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Abstract


Dispatch of emergency supplies to prevent and reduce the losses caused by unexpected events play an important role in a timely and reasonable schedule a large number of emergency supplies to the place is the core work of the emergency rescue . In recent years , emergency supplies scheduling has become a hotspot of attention and study . Use of limited resources in a short period of time with the fastest and most economical way to dispatch emergency supplies is the key to the problem . This paper first describes the process of scheduling emergency supplies , and comparing the normal commercial goods transportation scheduling , emergency supplies scheduling characteristics . Based on the demand for emergency supplies , as well as the characteristics of the emergency phase of the rescue mission , emergency supplies scheduling is divided into two stages: the Ⅱ stage the Ⅰ stage for the main task to save lives and shelter for those made homeless as the main task , and designed a two-stage scheduling process . Priority factors affecting the demand for emergency supplies , demand priority evaluation index system and application -level analysis method to determine the index weight . On this basis , given the prioritization model based on the demand for emergency supplies Vague set , improved Vague similarity measure obtained from the formula supplies the needs of priority . Six main factors that affect the demand for emergency supplies , design a conceptual model of the forecast demand for emergency supplies . More multi supplies - save point - affected multi- point background priority , consider the needs of the materials , the establishment of the emergency supplies in two phases scheduling model . Both the time and cost of emergency dispatch , Ⅰ stage emergency shortest target stressed the shortest possible time to transport materials to the affected point ; Ⅱ stage, contingency cost and Emergency time minimum target , emphasizing both minimum emergency time and the most economic way to transport materials to the affected point . Were designed encoding process symbol coding and natural sequence coded genetic algorithm suitable for solving the two scheduling model selection, crossover and mutation operations combined elitist strategy to speed up the computation efficiency and guarantee excellent individuals replication and genetic . Finally , refined through actual numerical example shows the validity of the model and algorithm .

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CLC: > Economic > Economic planning and management > Economic calculation, economic and mathematical methods > Economic and mathematical methods
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