低碳環(huán)境下的多式聯(lián)運路徑優(yōu)化研究
[Abstract]:With the rapid development of electronic commerce and the strong promotion of Internet, logistics, as a successor and service provider of commercial flow, plays an important role in improving social and economic benefits. According to the characteristics of different modes of transport, multimodal transport can arrange the connection of transportation modes reasonably, which can not only improve the efficiency of logistics, but also play an important role in the improvement of social and economic benefits. Therefore, in the increasingly serious ecological problem today, the research of multimodal transport path optimization in low carbon environment has important practical and theoretical significance. The influence of damage rate and abnormal working hours on route selection is seldom considered in the existing multimodal transport route optimization studies, and the effect of supply and demand is not taken into account in carbon trading price. However, in the pursuit of quality and effectiveness of modern logistics, damage occurs from time to time. If the time of arrival of the goods is abnormal working time, in order to ensure the effectiveness of the transportation process, Multimodal transport operators often bear additional freight charges. In addition, in the transformation of multi-objective to single-objective, most of the existing studies assign weights according to the degree of importance of factors, which is subjective to a certain extent. Therefore, based on the theory of system engineering, the TOPSIS method based on information entropy and genetic algorithm are used in this paper. The multiobjective model and the single objective model of path optimization for low carbon multimodal transport are established from the perspective of multimodal transport operator. For the multi-objective model, in order to eliminate the influence of subjective factors on the weight assignment, the entropy method is used to determine the index weight. By combining the TOPSIS method based on information entropy with genetic algorithm, the proximity between individual and ideal solution is regarded as fitness function to select individual's merits and demerits. The validity and rationality of the algorithm are verified by comparing and analyzing the combined transport schemes with different damage rates. For the single-objective model, this paper takes into account the extra transshipment cost caused by the abnormal working hours at the transfer node in the time window cost, the carbon tax in the carbon emission cost, and the carbon trading under the variable transaction price. Under the background of carbon trading, a single objective path optimization model with minimum total cost is set up, and a case is solved by genetic algorithm, and different carbon tax rates and carbon emission quota are analyzed. The influence of time window on path selection verifies the feasibility and validity of the model and algorithm. The model and algorithm proposed in this paper provide a certain decision basis for the multimodal transport operators to formulate a reasonable multimodal transport route optimization scheme under the complex environment, and improve the social and economic benefits. The sustainable development of environment has important theoretical and practical significance.
【學(xué)位授予單位】:河南大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:X196;F259.2
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