自適應(yīng)遺傳算法在越庫車輛調(diào)度問題中的應(yīng)用研究
[Abstract]:With the rapid development of national economy, the demand for social logistics has increased significantly, and the logistics industry has been promoted to maintain sustainable, stable and rapid development. In the actual operation process of logistics, vehicle scheduling has always been the key factor affecting the transportation efficiency and logistics cost of enterprises. Crossing the warehouse refers to a way of organizing the whole process of loading and unloading the goods from the loading truck to the distribution center, the goods are distributed and processed, and then to the loading door. The goods will not be stored in the distribution center, but will be distributed directly. The implementation of this organization can reduce and reduce the cost, time, link and so on, thus greatly improving the efficiency of logistics. The problem of vehicle scheduling over warehouse can be described as the problem of how to distribute vehicles and warehouse doors reasonably under certain constraints, so that the whole operation can be optimized in cost or time. It is a typical NP difficult (NP-Hard) problem, and it is also one of the most difficult classical combinatorial optimization problems. In the past few decades, researchers have been constantly looking for and trying new scheduling algorithms to improve operational efficiency, reduce operating costs and time, and increase the competitiveness of enterprises. Genetic algorithm, as one of the most important algorithms in bionic methods, is also one of the most widely used evolutionary computing methods. Genetic algorithm has irreplaceable advantages in scheduling optimization research because of its adaptability, global optimality and implicit parallelism in solving various nonlinear optimization problems. In this paper, according to the characteristics of multi-warehouse gate vehicle scheduling problem, based on genetic algorithm, an improved new algorithm is proposed, which is more suitable for solving multi-warehouse gate vehicle scheduling problem. Because of the problems of slow convergence, poor stability and premature phenomenon in the application of simple genetic algorithm, some existing improved adaptive genetic algorithms are easy to produce local optimal solution and other defects in the process of solving. Based on the whole process of genetic algorithm, aiming at the defects of genetic algorithm, such as easy to fall into local optimization in the early stage and slow evolution in the middle and late stages, this paper improves the population diversity, individual optimal preservation strategy, cross probability and mutation probability. According to the actual problems, an adaptive genetic algorithm is proposed, which can effectively solve the vehicle scheduling problem of multi-warehouse gate crossing. The experimental results show that the convergence rapidity and stability of the algorithm are obviously improved, and the expected results are achieved. Finally, a multi-warehouse gate vehicle scheduling system is developed according to the model and improved algorithm of cross-warehouse vehicle scheduling.
【學位授予單位】:廣東工業(yè)大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:U492.22;TP18
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