正交设计法在拖驳船队参数优选中的应用

将正交设计法应用于拖驳船队参数的优选上，对拖驳船队组方案进行技术经济论，通过多级优选，得到了最佳组队方案，并且对油价等因素的变化是否对象最佳组队方案产生影响进行了敏感性分析。     

A real-life Multi Depot Multi Period Vehicle Routing Problem with a Heterogeneous Fleet: Formulation and Adaptive Large Neighborhood Search based Matheuristic

In this paper, a new rich Vehicle Routing Problem that could arise in a real life context is introduced and formalized: the Multi Depot Multi Period Vehicle Routing Problem with a Heterogeneous Fleet. The goal of the problem is to minimize the total delivery cost. A heterogeneous fleet composed of vehicles with different capacity, characteristics (i.e. refrigerated vehicles) and hourly costs is considered. A limit on the maximum route duration is imposed. Unlike what happens in classical multi-depot VRP, not every customer may/will be served by all the vehicles or from all the depots. The planning horizon, as in most real life applications, consists of multiple periods, and the period in which each route is performed is a variable of the problem. The set of periods, within the time horizon, in which the delivery may be carried out is known for each customer. A Mixed Integer Programming (MIP) formulation for MDMPVRPHF is presented in this paper, and an Adaptive Large Neighborhood Search (ALNS) based Matheuristic approach is proposed, in which different destroy operators are defined. Computational results, pertaining to realistic instances, which show the effectiveness of the proposed method, are provided.     

波形钢腹板组合梁桥的抗剪局部屈曲强度计算

为更精确地计算波形钢腹板局部屈曲强度,在收集国外试验数据的基础上,通过分析已有公式计算结果与实测值的符合程度,对波形钢腹板局部屈曲强度的合理计算方法进行了探讨。     

Selatm — a GIS based program for evaluating the safety benefits of local area traffic management schemes

Particular safety problems relate to traffic on local streets. Local Area Traffic Management (LATM) schemes are often implemented with the objective of counteracting these safety problems. One analytical difficulty in appraising the effectiveness of LATM in dealing with safety problems has been the ‘footloose’ nature of accident locations in a local street network. Seldom are there distinct ‘blackspot’ locations. An area‐wide approach is needed and the interaction between the system and arterial road network must be considered. The paper describes the development of a Safety Evaluation Method for Local Area Traffic Management (termed SELATM). It is a GIS‐based program for analysing accident patterns over time and the evaluation of the safety benefits of LATM schemes. The evaluation is perform at different network levels for various accident variables. The thrust of the program involved the integration of network data with data on accidents and the installed devices to generate summary accident statistics for the various network levels allowing for before and after comparison with a control area. This program as developed is applied to a LATM scheme at Enfield, a suburb in metropolitan Adelaide.     

当代西方“整体政府”改革:组织创新及方法

20世纪90年代中后期，西方国家继新公共管理改革之后进行了以“整体政府”为内容的第二轮政府改革运动。“整体政府”改革基于结果与目标的组织创新进路，以伙伴关系为创新工具，形成了一种有别于传统官僚制和新公共管理“企业家政府”的新型组织模式，即“整体政府”组织模式。该组织模式在内容上具有以“联合”为特征的两种组织结构形式和以“整合”为内涵的组织目标及机制，在方法上为公共行政组织的研究开辟了一条社会学的研究途径。     

湘黔铁路资水大桥冲刷稳定性计算分析

以湘黔铁路资水大桥为研究对象，就冲刷对铁路重力式实体桥墩稳定性的影响进行研究。采用弹性半空间地基模型分析基底冲刷淘空面积对桥墩稳定性的影响，并通过Matlab计算程序给出影响曲线表达式。通过曲线拟合出粒径和局部冲刷深度之间的关系。研究结果表明：基底冲刷淘空面积对桥墩稳定性各检算项目都有明确的影响，其中墩顶弹性水平位移和合力偏心矩较敏感，在基底冲刷淘空面积较小时率先达到最大容许值，此时二者对应的冲刷淘空面积占基底总面积百分比的最小值分别为14．3％和17．8％；当其他因素一定时，河床土粒径对局部冲刷深度有明显的影响，这种影响在粒径小于0．12m的范围内变化时最为强烈。分析结果反映出适当增大桥墩周围河床土粒径可以有效提高其冲刷稳定性。     

某车型电瓶寿命的建模与分析

根据某车队的维修记录，确定车辆的易损件．然后选择对电瓶进行分析研究，根据失效数据和截尾数据建立电瓶的寿命分布模型．在建立起来的可靠性模型的基础上对维修政策进行讨论，在费用优先的前提下制定合理的维修政策．     

An optimal aircraft fleet management decision model under uncertainty

Decision planning for an efficient fleet management is crucial for airlines to ensure a profit while maintaining a good level of service. Fleet management involves acquisition and leasing of aircraft to meet travelers' demand. Accordingly, the methods used in modeling travelers' demand are crucial as they could affect the robustness and accuracy of the solutions. Compared with most of the existing studies that consider deterministic demand, this study proposes a new methodology to find optimal solutions for a fleet management decision model by considering stochastic demand. The proposed methodology comes in threefold. First, a five‐step modeling framework, which is incorporated with a stochastic demand index (SDI), is proposed to capture the occurrence of uncertain events that could affect the travelers' demand. Second, a probabilistic dynamic programming model is developed to optimize the fleet management model. Third, a probable phenomenon indicator is defined to capture the targeted level of service that could be achieved satisfactorily by the airlines under uncertainty. An illustrative case study is presented to evaluate the applicability of the proposed methodology. The results show that it is viable to provide optimal solutions for the aircraft fleet management model. Copyright © 2013 John Wiley & Sons, Ltd.     

多属性决策在舰艇编队防空目标选择决策中的应用研究

在目标信息不完全的情况下,进行打击目标的快速决策,需要考虑的因素众多,各因素之间有的相互关联,有的相互冲突,从而使决策不可避免的会出现不准确性.应用多属性决策的方法进行打击目标选择,建立相应的模型,并通过综合赋权法,将客观权重和主观权重相结合,提高了决策的科学性和合理性,为舰艇编队的防空打击目标选择的快速决策提供科学的依据.     

论大学生就业中政府的法律责任

在促进大学生就业的视域中,政府的法律责任不可缺位。基于对政府促进大学生就业的法理基础、现实依据和法律责任定位的考量,确立政府法律责任体系、明晰政府及其工作人员的法律责任、廓清政府在反歧视就业中的法律责任、扩大政府法律责任的可诉性范围,乃是完善大学生就业中政府法律责任的进路。