Analysis of practical policies for a single link distribution system

In this paper we consider a transportation problem where several products have to be shipped from an origin to a destination by means of vehicles with given capacity. Each product is made available at the origin and consumed at the destination at the same constant rate. The time between consecutive shipments must be greater than a given minimum time. All demand needs to be satisfied on time and backlogging is not allowed. The problem is to decide when to make the shipments and how to load the vehicles with the objective of minimizing the long run average of the transportation and the inventory costs at the origin and at the destination over an infinite horizon. We consider two classes of practical shipping policies, the zero inventory ordering (ZIO) policies and the frequency‐based periodic shipping (FBPS) policies. We show that, in the worst‐case, the Best ZIO policy has a performance ratio of . A better performance guarantee of is shown for the best possible FBPS policy. The performance guarantees are tight. Finally, combining the Best ZIO and the Best FBPS policies, a policy that guarantees a performance is obtained. Computational results show that this policy gives an average percent optimality gap on all the tested instances of <1%. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

发展学生个性要重视有针对性的个别教育

大学学习阶段是大学生世界观形成的阶段,也是个性品质形成及巩固阶段.通过分析学生在不同学习阶段的个性差异,提出要使"全体"学生在知识、能力、素质三方面获得"全面协调"发展的同时,更强调学生的个性应获得生动活泼的发展.在课程教学中,应重视有针对性的个别教育工作,满足学生个性发展的要求.并给出了解学生个性差异的方法和个别教育的艺术.     

单兵数字化系统人机界面分析与设计——“数字化战场与单兵数字化系统”系列论文之五

首先简要分析了单兵数字化系统中人机界面的设计原则，并根据单兵系统及其所处环境的特点，讨论了多种界面类型在该系统中的利弊、作用及实现的可能性。最后讨论了界面中各种信息的分组以及界面的展现（屏幕）设计     

系统突变理论的战场描述终态条件及模型

分析经典的基于兰切斯特方程描述的作战过程,在此基础上,把数理战术学中的最优决策理论和系统学中的系统突变理论相结合,通过对作战双方微分方程的毁伤率引入士气参数,建立数学模型,提出系统突变条件下描述战场的终态条件,并利用此条件探讨最优控制条件下的策略,为进一步研究战争的形态提供理论参考。     

Stochastic regret minimization for revenue management problems with nonstationary demands

We study an admission control model in revenue management with nonstationary and correlated demands over a finite discrete time horizon. The arrival probabilities are updated by current available information, that is, past customer arrivals and some other exogenous information. We develop a regret‐based framework, which measures the difference in revenue between a clairvoyant optimal policy that has access to all realizations of randomness a priori and a given feasible policy which does not have access to this future information. This regret minimization framework better spells out the trade‐offs of each accept/reject decision. We proceed using the lens of approximation algorithms to devise a conceptually simple regret‐parity policy. We show the proposed policy achieves 2‐approximation of the optimal policy in terms of total regret for a two‐class problem, and then extend our results to a multiclass problem with a fairness constraint. Our goal in this article is to make progress toward understanding the marriage between stochastic regret minimization and approximation algorithms in the realm of revenue management and dynamic resource allocation. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 433–448, 2016     

采用重构吸引子的辐射源个体识别技术

为解决现有基于相空间个体识别方法面临重构特征矢量维数高、计算效率低、鲁棒性差等问题,从非线性动力学角度出发,构建了基于重构吸引子的辐射源个体识别框架,并在此框架内提出了基于等距映射的辐射源个体识别技术。该技术采用等距映射从相空间中重构辐射源吸引子,可以更低的维度描述辐射源系统动力学特性,反映辐射源个体的“指纹”特征。实验表明该方法识别准确率更高、效率更高、听鲁棒性更强。     

任务驱动的一体化作战指挥信息系统高效协同技术

针对一体化网络中心战下各参与方作战指挥信息系统的异构性、自治性、多样性等特点给联合协同作战带来的问题,提出了任务驱动的一体化作战指挥信息系统高效协同技术。以作战目标为导向将各作战力量和资源按需聚合和自主协同,引入自主个体、虚拟任务共同体和虚拟任务执行体,构建一体化虚拟作战指挥环境,为各作战单位提供高效、协同、透明的一体化服务。分别从核心元素、系统框架分别介绍高效协同体系结构,结合陆军合成营指挥信息系统案例对高效协同技术各组成部分进行深入分析,验证该技术的可行性。     

基于自适应变异粒子群算法的火力分配方法研究

针对最优火力分配的特点,分析了火力分配优化问题的数学模型,设计了一种求解该类问题的自适应变异粒子群算法（Adaptive Mutation Particle Swarm Optimization, AMPSO）。该算法采用十进制编码方法和基于数值运算的个体更新方法;为平衡算法的局部搜索能力和全局收敛性能,设计了一种关键参数自适应调整方法;为增强种群在进化后期的多样性,提出了一种变异策略。仿真结果表明,所提AMPSO算法具有良好的寻优性能,是优化火力分配的一种有效算法。     

尖点突变模型对单通道火力打击问题的研究

分析单通道火力打击的作战过程,在此基础上,运用系统学中的系统突变理论,通过对打击问题的分析,建立基于尖点突变的数学模型,提出避免系统发生突变的条件,为进一步研究此类火力打击问题提供理论参考。     

论“香草美人”的原型意象及在《聊斋志异》中的范变

本文运用"神话———原型"理论从宗教祭祀的角度,探讨了九歌的性质、意义,指出《离骚》的诞生是源自九歌的祭祀仪式,并从此形成"香草美人"原型意象,随文化的传承积淀在集体无意识之中,裹挟着屈原的人格魅力和深沉温馨的原型意象经蒲松龄强烈而丰富的个体意识被激活,于《聊斋志异》中深沉地勃发,并被赋予崭新的内涵。