试析辽代骆驼的来源及用途

本文通过《辽史》的记载,并结合考古出土的文物,对辽代骆驼的来源和用途进行了剖析和论证,认为辽代骆驼的来源主要有战争掠夺和属国、属族进贡两种方式,而辽代骆驼的用途主要有驼运、骑车、驼载、驾车、纺织、捐官等,以此最终说明骆驼在辽代社会中占有非常重要的作用。     

多车场集送一体化车辆调度问题及其遗传算法研究

针对物流配送中的多车场一体化车辆调度问题提出了智能处理方法,采用了基于自然数的一体化配送对路径表示方式,用里程约束来控制车场的插入,以增加惩罚的方式加入时间窗约束。并且根据具体约束情况设计了改进的遗传算法,采用了动态染色体、改进的交叉和变异法、内部扰动和外部扰动等技术,提高了遗传算法的优化效率和优化效果。介绍了此算法的原理,给出了具有一个代表性算例试验结果和结果分析。试验结果表明了此方法对优化有里程和时间窗约束的多车场一体化车辆调度问题的有效性。     

劳务派遣中受遣员工权利保护法律问题探讨

劳务派遣是一种新型用工方式,它改变了传统劳动关系中用人单位与劳动者之间的法律地位,不加规制的劳务派遣使劳动者陷于一种极为不利的状况,如何厘清劳务派遣中当事人之间的权利义务关系是立法的关键,从多层面保护劳动者是劳务派遣立法的应有之义。     

Pareto mimic algorithm: An approach to the team orienteering problem

The team orienteering problem is an important variant of the vehicle routing problem. In this paper, a new algorithm, called Pareto mimic algorithm, is proposed to deal with it. This algorithm maintains a population of incumbent solutions which are updated using Pareto dominance. It uses a new operator, called mimic operator, to generate a new solution by imitating an incumbent solution. Furthermore, to improve the quality of a solution, it employs an operator, called swallow operator which attempts to swallow (or insert) an infeasible node and then repair the resulting infeasible solution. A comparative study supports the effectiveness of the proposed algorithm, especially, our algorithm can quickly find new better results for several large-scale instances. We also demonstrate that Pareto mimic algorithm can be generalized to solve other routing problems, e.g., the capacitated vehicle routing problem.     

中国大城市出租车服务业改革的目标与策略

出租车行业的许可管制应实行车辆管制模式,即向个人和公司公开拍卖出租车营运证,引入竞争性多元化经营模式。合理设计营运证市场的机制和规则,形成营运证一级市场和二级市场,分别进行拍卖和自由转让。政府则通过控制营运证数量来调节供求和价格。在此基础上,加强行业的培育,发挥行业组织在出租车运营和管理中的作用,政府逐步退出对出租车行业的直接干预。     

An investigation into the vehicle routing problem with time windows and link capacity constraints

In this work, we investigate a new, yet practical, variant of the vehicle routing problem called the vehicle routing problem with time windows and link capacity constraints (VRPTWLC). The problem considers new constraints imposed on road links with regard to vehicle passing tonnage, which is motivated by a business project with a Hong Kong transportation company that transports hazardous materials (hazmats) across the city and between Hong Kong and mainland China. In order to solve this computationally challenging problem, we develop a tabu search heuristic with an adaptive penalty mechanism (TSAP) to help manage the company's vehicle fleet. A new data set and its generation scheme are also presented to help validate our solutions. Extensive computational experiments are conducted, showing the effectiveness of the proposed solution approach.     

Scheduling to minimize stringer utilization for continuous annealing operations

In this paper we present a mathematical program and heuristic algorithms to schedule coils for the production operations in a copper (or steel) coil manufacturing industry. The processing facility uses continuous operations for processing (e.g., galvanizing and annealing) while the handling unit is a discrete coil. The ends of coils are “stitched” or welded together to enable continuous processing, and the joint is later sheared off to obtain the processed coils. Processing constraints impose restrictions on the compatibility between a pair of coils that are overcome by introducing a dummy coil called stringer, which is very expensive to a mill. This paper deals with modeling the sequencing/scheduling problem of coils on parallel non-identical machines to minimize stringer utilization. Both computational and practical experiences show the efficiency and effectiveness of the solution approaches. Implementing these methods in an actual coil annealing facility resulted in 65% reduction in stringer utilization.     

关于法庆起义几个重要问题的重新检讨

法庆起义是北魏延昌年间由冀州僧人法庆领导的一次沙门暴乱,因其自号大乘,也称大乘起义。学界一般认为法庆大乘起义是弥勒信仰组织的暴动,对大乘一词的意义多从教派以及与小乘佛教相对的大乘观念来理解。但是从当时流行的佛教思想及经典背景来看,其自号大乘及起义的理论依据是直接来源于当时流行的《大般涅槃经》,与弥勒信仰无关联。     

基于复杂网络的电动汽车充电桩众筹市场信用风险建模与分析

因其经济优势及环境友好特性,电动汽车（EV）保有量持续攀升。而当前中国充电设施建设明显滞后于电动汽车的扩张速度,成为制约电动车发展潜力的主要瓶颈。由于充电设施具有高正外部性,同时投资回收期较长,难以吸引到传统融资,而基于互联网的众筹作为新型融资方式则受到了广泛关注。但由于缺乏强制性的信息披露制度及相关法律法规,众筹融资过程中的信息不对称问题相较传统融资方式更为严重,由此导致的高违约率也进一步削弱了投资者信心。本文利用复杂网络对电动汽车充电桩众筹融资市场进行建模,刻画了众筹投资者决策过程中的羊群效应,基于信息不对称使用多Agent模型对信用风险的产生、影响及针对性政策效果进行了模拟分析。结果表明,众筹投资者在决策过程中易受到社交网络中负面信息的影响,使得筹资人违约行为的不利影响进一步扩散。而严格的罚款机制可以在不影响融资市场均衡的情况下,使违约行为的恶性循环得到遏制。     

大宗物资集中采购的调运计划研究

大宗物资调运问题是一个受多因素影响的复杂问题,一般来讲,其调运数量大、地域跨度大、时间紧。如何协调供需以及运输能力,保证物资采购部门的经济利益是本文所要研究的问题。本文首先给出了大宗物资集中采购的调运模式,然后针对采购部门在大宗物资调运过程中遇到的困难,为采购部门提出了以获取数量折扣、准时采购、降低库存成本和协调运输能力为准则的调运计划模型。数值计算表明应用本文所建模型编制调运计划能够达到降低采购费用、协调运输能力的目的,为大宗物资调运计划的编制提供了一种较为有效的方法。