配送中心多车辆集散货物路线的禁忌搜索研究

多车辆集散货物路线问题是客户可以同时取货和发货,而且客户发货量在路线安排前是不确定的。提出了一种改进的禁忌搜索算法,该算法将路径问题按不同的车辆-顾客分配结构分解成若干子问题,然后用禁忌搜索算法求解每个子问题,最后从所有子问题的最优解中选出全局最优解。     

改进的粒子群算法在VRP中的应用

将粒子群算法和禁忌搜索算法相结合构造禁忌搜索粒子群算法。提出一种对粒子群算法中全局最优解进行禁忌搜索的混合算法,扩展了粒子群算法进化方式。将其用于车辆路径优化问题求解。与基本粒子群算法相比较,结合禁忌搜索算法的粒子群算法明显提高了算法收敛速度和优化性能。     

改进的粒子群算法在VRP中的应用

将粒子群算法和禁忌搜索算法相结合构造禁忌搜索粒子群算法.提出一种对粒子群算法中全局最优解进行禁忌搜索的混合算法,扩展了粒子群算法进化方式.将其用于车辆路径优化问题求解.与基本粒子群算法相比较,结合禁忌搜索算法的粒子群算法明显提高了算法收敛速度和优化性能.     

求解三维装载约束下车辆路径问题的混合禁忌搜索算法

三维装载约束下车辆路径问题是车辆路径问题集合中极为复杂的问题。针对这一问题,提出了三种混合禁忌搜索算法。该算法首先设计了空间处理方式,通过在初始解构造阶段采用不同的装载规则来实现客户货物的装载,然后引入禁忌搜索算法对解空间进行搜索。最后,扩展了Solomon的标准用例对三种算法进行了实验,实现结果显示提出的算法是求解该问题的有效算法,同时其中一种算法相对而言具有一定的优势。     

遗传算法求解VRP问题

在分析了许多求解固定车辆路径问题的优化算法后，提出了一种新的求解固定车辆路径问题的遗传算法。该算法的核心在于构建一种新的染色体编码，并且将“Inver-0ver”遗传操作算子与禁忌搜索算法结合起来，利用种群的信息引导种群的进化。引入动态非法检测来淘汰不合法个体，扩展了解空间并加快了搜索速度。经过大量的实例测试，该遗传算法增强了群体演化的质量，提高了算法收敛速度，能够找到比较好的近似最优解。     

基于局部禁忌搜索策略的连续空间蚁群算法

针对蚁群算法容易陷入局部最优解及搜索时间长等不足,引入一种基于连续空间的禁忌搜索算法,并将其与蚁群算法相结合,提出了一种引入禁忌搜索策略的蚁群算法,以求解连续对象优化问题。经测试验证了该算法不仅跳出局部最优解的能力更强,而且能较快地收敛到全局最优解,表明算法的有效性。     

面向全局搜索的自适应领导者樽海鞘群算法

针对实际配送过程中客户需求、车辆服务时间随机可变,提出带软时间窗的随机需求和随机服务时间的车辆路径问题.以配送车辆行驶路径为研究对象,建立基于配送成本、时间惩罚成本、修正成本的配送车辆路径优化模型,并提出一种混合禁忌搜索算法.该算法将最近邻算法和禁忌搜索算法相结合,将时间窗宽度及距离作为最近邻算法中节点选择标准;并对禁忌搜索算法中禁忌长度等构成要素进行自适应调整,引入自适应惩罚系数.实验结果表明,改进后的混合禁忌搜索算法具有较强的寻优能力、较高的鲁棒性,同时算法所得车辆行驶路径受客户需求变动影响较小.     

混合算法求解VRP问题

车辆路径问题（VRP）是典型的复杂组合优化问题,也是一个求解非常困难的NP难问题。对于大规模的VRP问题,一般采用近似算法来进行求解。通过采用一种基于遗传算法和禁忌搜索算法的混合算法,结合两者的优点,既克服了遗传算法爬山能力差的缺点,又克服了禁忌搜索算法的对初值的依赖性,使得算法能够更快更准的收敛到最优解。     

基于TS的动态车辆调度问题的混合算法研究

对带时间窗的动态车辆调度问题进行分析,采用实时再优化方法进行研究,引入时间轴概念,建立动态车辆调度模型,并给出求解的混合禁忌搜索算法。该算法先用C-K节约算法求得初始解,然后用禁忌搜索进行优化,得到全局最优解。禁忌搜索算法中采用动态邻域移动方法构造候选解和动态禁忌长度选取策略设置紧急长度,提高算法的收敛速度。最后用实例证明该混合算法的可行性和有效性。     

有时间窗车辆路径问题的捕食搜索算法

有时间窗车辆路径问题是当前物流配送系统研究中的热点问题，该问题具有NP难性质。难以求得最优解或满意解，在建立有时间窗车辆路径问题数学模型的基础上。设计了一种模仿动物捕食策略的捕食搜索算法．该算法利用控制搜索空间的限制大小来实现算法的局域搜索和全局搜索，具有良好的局部集中搜索和跳出局部最优的能力．通过实例计算，并与相关启发式算法比较．取得了满意的结果．     

A deterministic tabu search algorithm for the capacitated arc routing problem

The capacitated arc routing problem (CARP) is a difficult optimisation problem in vehicle routing with applications where a service must be provided by a set of vehicles on specified roads. A heuristic algorithm based on tabu search is proposed and tested on various sets of benchmark instances. The computational results show that the proposed algorithm produces high quality results within a reasonable computing time. Some new best solutions are reported for a set of test problems used in the literature.     

遗传算法与禁忌搜索算法的混合策略在VRPTM问题上的应用

该文探讨了如何将基于遗传算法和禁忌搜索算法的混合策略应用于求解有时间窗的车辆路径(VRPTM)问题,给出了相应的应用算法。实验结果表明,这种将禁忌搜索作为变异操作的混合策略对VRPTM问题是行之有效的,其优化性能优于简单的遗传算法。     

Parallel hyper heuristic algorithm based on reinforcement learning for the corridor allocation problem and parallel row ordering problem

Hyper heuristics is a relatively new optimisation algorithm. Numerous studies have reported that hyper heuristics are well applied in combinatorial optimisation problems. As a classic combinatorial optimisation problem, the row layout problem has not been publicly reported on applying hyper heuristics to its various sub-problems. To fill this gap, this study proposes a parallel hyper-heuristic approach based on reinforcement learning for corridor allocation problems and parallel row ordering problems. For the proposed algorithm, an outer layer parallel computing framework was constructed based on the encoding of the problem. The simulated annealing, tabu search, and variable neighbourhood algorithms were used in the algorithm as low-level heuristic operations, and Q-learning in reinforcement learning was used as a high-level strategy. A state space containing sequences and fitness values was designed. The algorithm performance was then evaluated for benchmark instances of the corridor allocation problem (37 groups) and parallel row ordering problem (80 groups). The results showed that, in most cases, the proposed algorithm provided a better solution than the best-known solutions in the literature. Finally, the meta-heuristic algorithm applied to three low-level heuristic operations is taken as three independent algorithms and compared with the proposed hyper-heuristic algorithm on four groups of parallel row ordering problem instances. The effectiveness of Q-learning in selection is illustrated by analysing the comparison results of the four algorithms and the number of calls of the three low-level heuristic operations in the proposed method.     

A tabu search heuristic for the truck and trailer routing problem

Two new construction heuristics and a tabu search heuristic are presented for the truck and trailer routing problem, a variant of the vehicle routing problem. Computational results indicate that the heuristics are competitive to the existing approaches. The tabu search algorithm obtained better solutions for each of 21 benchmark problems.     

带装载量约束的物流配送车辆路径优化研究

建立了物流配送车辆路径模型,设计了一种禁忌搜索算法,进行了多个算例测试和比较。测试表明模型的正确性,显示出禁忌搜索算法在物流配送车辆路径优化中计算时间节省、路程里程节省、总费用最小化等方面比遗传算法、模拟退火算法、蚁群算法及其混合算法具有明显的优势,能很好地适应现代物流对配送环节快速、低成本的要求。     

Extended guided tabu search and a new packing algorithm for the two-dimensional loading vehicle routing problem

In this paper, we develop an extended guided tabu search (EGTS) and a new heuristic packing algorithm for the two-dimensional loading vehicle routing problem (2L-CVRP). The 2L-CVRP is a combination of two well-known NP-hard problems, the capacitated vehicle routing problem, and the two-dimensional bin packing problem. It is very difficult to get a good performance solution in practice for these problems. We propose a meta-heuristic methodology EGTS which incorporates theories of tabu search and extended guided local search (EGLS). It has been proved that tabu search is a very good approach for the CVRP, and the guiding mechanism of the EGLS can help tabu search to escape effectively from local optimum. Furthermore, we have modified a collection of packing heuristics by adding a new packing heuristic to solve the loading constraints in 2L-CVRP, in order to improve the cost function significantly. The effectiveness of the proposed algorithm is tested, and proven by extensive computational experiments on benchmark instances.     

Randomised Local Search Algorithm for the Clustering Problem

We consider clustering as a combinatorial optimisation problem. Local search provides a simple and effective approach to many other combinatorial optimisation problems. It is therefore surprising how seldom it has been applied to the clustering problem. Instead, the best clustering results have been obtained by more complex techniques such as tabu search and genetic algorithms at the cost of high run time. We introduce a new randomised local search algorithm for the clustering problem. The algorithm is easy to implement, sufficiently fast, and competitive with the best clustering methods. The ease of implementation makes it possible to tailor the algorithm for various clustering applications with different distance metrics and evaluation criteria.     

模糊时间窗VRP的动态规划和禁忌搜索混合算法

为优化具有模糊时间窗的车辆路径问题,以物流配送成本和顾客平均满意度为目标,建立了多目标数学规划模型。基于Pareto占优的理论给出了求解多目标优化问题的并行多目标禁忌搜索算法,算法中嵌入同时优化顾客满意度的动态规划方法,运用阶段划分,把原问题分解为关于紧路径的优化子问题。对模糊时间窗为线性分段函数形式和非线性凹函数形式的隶属度函数,分别提出了次梯度有限迭代算法和次梯度中值迭代算法来优化顾客的最优开始服务时间。通过Solomon的标准算例,与次梯度投影算法的比较验证了动态规划方法优化服务水平的有效性,与主流的NSGA-II算法的对比实验表明了该研究提出的多目标禁忌搜索算法的优越性。