战术导弹垂直发射控制的输出解耦变结构方法研究

战术导弹垂直发射时需要姿态快速机动 ,这造成了在姿态调过程中导弹呈现较严重的非线性和耦合特性。针对垂直发射时系统的要求和特点 ,利用输入输出解耦变结构控制方法 ,研究了战术导弹垂直发射姿态调转的控制问题。首先结合垂直发射的具体特点 ,建立控制系统非线性数学模型 ;然后利用输入输出解耦变结构控制方法 ,进行导弹垂直发射姿态调转的控制系统设计 ,得到了具有良好鲁棒性的非线性控制律 ;最后通过仿真验证了该控制律的有效性     

机液耦合多管火箭发射系统动态仿真

基于ADAMS建立了机械系统和液压系统耦合的某多管火箭发射系统虚拟样机,给出了发射系统仿真过程中变结构的自由切换方法,分析该新型火箭发射系统发射动态特性,用灵敏度分析法分析泄漏对系统发射过程的影响,并比较了在全支撑和半支撑的两种工况下发射系统动态稳定性。结果表明采用液压伺服瞄准系统其发射精度是可以保证的,为该新型火箭发射系统的设计和发射提供了一定的理论依据     

战术导弹垂直发射技术综述

本文对近几年国外出现的战术导弹垂直发射技术作了全面扼要介绍,内容涉及这种发射技术出现的战术技术背景,发射系统的分类及典型结构说明,主要技术关键及解决这些问题的技术途径,装备现状及发展趋势等。     

基于黑板协作的多区域冲击监测

针对大型结构的多区域冲击监测特别是区域边界问题,提出了一种基于声发射技术的multi agent黑板协作冲击定位方法。采用基于multi agent技术的黑板协作模型监测大型结构各个传感器区域内部以及区域边界的冲击事件,利用agent的服务目录功能协调配置信号处理和声发射损伤定位模块,通过融合相关传感区域的定位结果,实现对整个结构可靠有效的评估。在大型航空铝板上的实验表明,该方法可以对大型结构的各个子区域特别是相邻边界区域进行有效的冲击定位。     

基于发射动力学仿真的某履带战车改优研究

应用动力学分析软件,建立了含有多复杂接触问题的某履带战车发射动力学仿真模型,并在模型中引入柔性路面,较真实的反映行车道路的状况;对该履带战车系统进行了发射动力学仿真分析,得到了全炮的受力及振动情况;在此基础上,提出了该履带战车的改进结构,并对比了改进前、后的全炮振动情况,由对比情况来看,改进后结构能够显著减小履带战车的炮口振动;本研究内容及方法可为今后更精确的研究一类含有复杂接触问题的履带战车发射过程动力学特性提供了理论参考.     

多通道分组SFBC-OFDM传输方案

空频分组编码(SFBC)结合正交频分多路复用(OFDM)的发射分集方案(SF-OFDM)利用空间分集可以有效克服快衰落信道造成的不利影响,提高系统性能。对SF-OFDM发射分集方案做了简要分析,提出了一种多通道分组SFBC-OFDM发射分集方案。在发射端采用分组结构的SFBC结合OFDM技术,在接收端利用OFDM中子载波选择矩阵进行分组干扰抑制,然后对每一通道SFBC进行传统的空频分组码解码。这种传输方案克服了发射天线数目较大时传统SFBC编码非常复杂的缺点,极大地降低了编码的复杂度。分析和仿真结果验证了该方法的有效性。     

电磁导轨炮技术

一、电磁发射技木和导轨炮 电磁发射技术是人类第三代脉冲动力技术,是继弓箭、火药之后,又一次脉冲动力技术上的飞跃。 根据载流导体在磁场中受“洛仑兹力”作用原理提出的电磁发射技术,可以分为两类。一类是离散或连续线圈结构的同步同轴交流电磁加速器,其载流抛射体在一系列脉     

考虑发射失败的多中心多卫星发射任务协同规划方法

在中国未来卫星发射需求急剧增加和卫星发射中心发射能力有限的情况下,为多颗卫星协调发射中心和发射时间变得日趋困难。为解决大量卫星发射任务的协同规划问题,以发射成本最少、发射失败概率最低为优化目标,建立了多中心多卫星发射任务协同优化的多目标混合整数规划模型。基于非支配排序的多目标优化算法(non-dominated sorting genetic algorithm II, NSGA II)框架,设计了求解模型的多目标进化算法,提出了发射中心选择的整数编码方案,给出了基于启发式搜索的发射时间规划解码算法,并设计了染色体质量检查与修正算法。基于中国现有的4个卫星发射中心和可能面临的6类发射任务,设计了包含10颗卫星发射任务的小规模案例和30颗卫星发射任务的大规模案例,对模型和算法进行了仿真验证。实验结果表明该方法能有效解决多中心多发射任务协同规划问题。     

基于混沌序列的MIMO雷达互补相位编码波形设计

多发多收(multiple-input multiple-output,MIMO)雷达使用相互正交的波形作为发射波形。用混沌序列可以在短时间内产生任意数量、任意长度的正交混沌相位编码波形。由于互相关和自相关旁瓣的影响,混沌相位编码波形作为发射信号时的脉冲压缩输出具有较高的距离旁瓣。提出一种通过遗传算法联合迭代算法,搜索设计混沌相位编码发射波形的最优互补波形的方法,使得这种互补发射结构能够有效地抑制高脉冲压缩输出距离旁瓣,从而提高MIMO雷达的目标检测性能,特别是对相邻弱小目标的检测性能。仿真部分基于4种常用混沌序列,与相关文献中波形进行比较,证明了该方法的有效性。     

一种新型火箭炮复合材料密封盖的数值仿真

根据密封盖的性能指标和战术要求,选择玻璃纤维布为材料,设计结构。基于失效准则和损伤演化规律,利用有限元方法进行了火箭弹冲破穿透密封盖和燃气流冲击密封盖的数值仿真。分析了六种密封盖方案,掌握了破裂效果和规律。得到了能沿预设撕裂线方向破裂,满足引信体的安全性和可靠性要求;不产生碎片,不会对干扰到后续弹的发射;能承受邻管发射时燃气流冲击的密封盖。     

线上线下融合的新零售模式运营管理研究现状与展望

近年来,线上线下融合的新零售模式得到了飞速发展,加速了中国乃至世界零售业的新变革,极大地影响和改变了人们的生产和消费方式.这种新模式实现线上线下优势互补、催生新的商务模式.伴随着这一新零售模式的飞速发展和落地实践,它所呈现出的协同性、集成性、网络化、数字化和智能化等特征,给新零售企业的运作管理带来了前所未有的挑战,使其面临重重困难.本文将从价值共创的视角,对新零售模式运营管理的几个核心问题展开剖析,重点从线上线下融合相关的基于价值共创的新零售模式创新、多利益主体协同运作激励机制、消费者需求拉动下的全渠道产品动态定价、新零售模式的全渠道运营库存管理以及"最后一公里"物流即时-协同配送优化等方面对国内外的相关研究进行综述,并展望未来研究的发展趋势.     

基于虚拟现实技术的地球太空环境仿真

描述了一种地球太空环境的仿真,采用几何计算构建地球形状模型,将地球划分为128块（经线方向16块和纬线方向8块）,计算得到每块区域顶点坐标,法向量,纹理坐标;使用MipMap技术根据视点与每块区域距离变化选择不同精度纹理粘贴;实时判断该区域的可见性,剔除不可见区域减少绘制开销;并采用cg和NormalMap技术将normal图与地球纹理图进行处理,实现地球表面的轮廓凹凸效果,同时添加云层纹理,得到了由地球纹理,云层纹理及NormalMap的多层混合纹理,达到比较逼真的效果;另外采用Billboard技术和纹理融合技术实现地球大气层光晕效果,使用了LensFlare技术实现太阳照射效果,最后采用skybox技术实现星空背景效果。

Abstract：

A simulation of earth and space environment was describedr.The whole earth was cut into 128 parts,16 in longitude,8 in latitude,and the position of vertices,normal vectors,texture coordinate were computed by geometry.Different resolutions of texture were chosen according to the distance from the eye to the area presented by the technique MipMap.The unvisible parts were eliminated by judging the parts’ visibility in realtime.Using the techniques of Cg,NormalMap and the mixture of the textures of the earth,the clouds and the multi-layered clouds,the relatively vivid result for representing the surface of the earth was achieved.Moreover,the technique of Billboard,Lensflare,SkyBox and texture blending were used to show the shine of atmosphere,sunshine,and the background of space.     

平台自营业务与第三方商家的劝说性广告竞争策略

针对综合型平台自营业务和第三方商家之间的销售竞争，考虑双方进行劝说性广告投放，构建了平台自营和第三方商家在不同市场地位情况下的博弈模型，分别给出了平台自营主导，第三方商家主导以及市场地位相同时的最优决策和均衡利润，并分析了横向差异化、纵向差异化和广告服务费系数对最优决策和均衡利润的影响。研究表明：横向差异化（消费者偏好强度）越大，在平台主导和第三方商家主导的两种情况下，平台价格和广告投放水平越高；第三方商家广告投放水平降低，价格先降低后增加；双方市场地位相同情况下，平台和第三方商家的均衡价格和广告投放水平相等，并且双方的价格随消费者偏好强度增加而增加，广告投放水平与消费者偏好强度无关。纵向差异化（平台相对于第三方商家的质量差异）越大，无论市场地位情况如何，平台（第三方商家）均衡价格和广告投放水平越高（越低）。广告服务费系数并不是越高越好，只有当第三方商家主导市场且广告服务费系数达到一定水平之后，此时广告服务费系数增加才能增加平台利润。     

Fundamentals of the analytic network process — multiple networks with benefits,costs, opportunities and risks

The general theory of the ANP enables one to deal with the benefits, opportunities, costs, and risks (the BOCR merits) of a decision, by introducing the notion of negative priorities for C and R along with the rating (not comparison) of the top priority alternative synthesized for each of the four merits in terms of strategic criteria to enable one to combine the four B, O, C, and R values of each alternative into a single outcome. Strategic criteria are very basic criteria individuals and groups use to assess whether they should make any of the many decisions they face in their daily operations. They do not depend on any particular decision for their priorities but are assessed in terms of the goals and values of the individual or organization. Synthesis is made with two formulas, one multiplicative and one additive subtractive that can give rise to negative overall priorities. This paper summarizes and illustrates basic complex decisions involving several control criteria under each of the BOCR merits. Thomas L. Saaty holds the Chair of University Professor, Katz Graduate School of Business, University of Pittsburgh, Pittsburgh, PA, and obtained his Ph.D. in mathematics from Yale University. Before that he was a professor at the Wharton School of the University of Pennsylvania for ten years. Prior to that he spent seven years at the Arms Control and Disarmament Agency in the State Department in Washington, DC, that carried out the arms reduction negotiations with the Soviets in Geneva. His current research interests include decision-making, planning, conflict resolution and synthesis in the brain. As a result of his search for an effective means to deal with weapons tradeoffs at the Disarmament Agency and, more generally, with decision-making and resource allocation, Professor Saaty developed The Analytic Hierarchy Process (AHP) and its generalization to dependence and feedback, the Analytic Network Process (ANP). He is co-developer of the software Expert Choice and of the software Super Decisions for decisions with dependence and feedback. He has authored or co-authored twelve books on the AHP/ANP. Professor Saaty has also written a number of other books that embrace a variety of topics, including Modern Nonlinear Equations, Nonlinear Mathematics, Graph Theory, The Four Color Problem, Behavioral Mathematics, Queuing Theory, Optimization in Integers, Embracing the Future and The Brain: Unraveling the Mystery of How It Works. His most recent book is Creative Thinking, Problem Solving & Decision Making. The book is a rich collection of ideas, incorporating research by a growing body of researchers and practitioners, profiles of creative people, projects and products, theory, philosophy, physics and metaphysics...all explained with a liberal dose of humor. He has published more than 300 referred articles in a wide variety of professional journals. He has been on the editorial boards of Mathematical Reviews, Operations Research, Naval Research Logistics Quarterly, Mathematical and Computer Modeling, Socio-Economic Planning Sciences, Applied Mathematics Letters, and several others. He also served as consultant to many corporations and government.     

Technical Note ：SINGLE-PERIOD TWO-PRODUCT INVENTORY MODEL WITH SUBSTITUTION： SOLUTION AND PROPERTIES

In this paper, we study a single-period two-product inventory model with stochastic demands and downward substitution. The optimal order quantities are presented and some properties are provided. Comparing with newsboy model, we prove that both the profit and the fill rate can be improved by using the substitution policy. This work was supported partly by NSFC/RGC Joint Research Program under grant 79910161987 and the National Science Foundation of China (79825102, 70231010, 70321001). Lianqiao CAI is lecturer of School of International Business, Beijing Foreign Studies University. He received his B.S. and M.S. from School of Economics and Management, Tsinghua University, in 1995 and 1998, and Ph.D of Management Science from Tsinghua University in 2002. His research areas include supply chain management, optimization techniques. Jian Chen is Professor and Chairman of the Management Science Department and co-director of the Research Center for Contemporary Management, Tsinghua University. He has over 80 papers published in some leading international journals and first class Chinese journals, and has been a principal investigator for over 20 grants or research contracts with National Science Foundation of China, governmental organizations, and companies. His main research interests include supply chain management, E-commerce, modeling and control for complex systems, decision support systems and information systems, and forecast and optimization techniques. He serves as associate editor of the “IEEE Transactions on Systems, Man and Cybernetics: Part A” and “IEEE Transactions on Systems, Man and Cybernetics: Part C”, and on the Editorial Board of “The International Journal of Electronic Business” and “System Research and Behavioral Science”. He is the recipient of the Outstanding Contribution Award of IEEE Systems, Man, and Cybernetics Society in 1996, and the Young Scientist Award of China in 1992. He was Secretary General of the 1996 IEEE International Conference on Systems, Man, and Cybernetics in Beijing, Co-chair of the IPC of 1998 International Conference on Systems Science and Systems Engineering, Chair of the First Asian eBiz Workshop in 2001, Co-chair of the Asian eBiz Workshop in 2002 and 2003, and Co-chair of the international conference on Global Supply Chain Management in 2002. Houmin Yan received his B.S. and M.S. from the Department of Automation, Tsinghua University, in 1982 and 1985, respectively, and his Ph.D. from the Faculty of Management, University of Toronto in 1993. From Jan. 1994, he is with the Department of Systems Engineering and Engineering Management, the Chinese University of Hong Kong as an Assistance, Associate and Full Professor. He was a tenured Associate Professor at School of Management, the Univ. of Texas at Dallas. His main research areas are operations management, stochastic models, simulations, and supply chain management. He has published in journals such as Operations Research, Manufacturing and Service Operations Management, Production and Operations Management, Journal of Optimization: Theory and Applications, IIE Transactions and IEEE Transactions. He consults several high-tech companies, such as Motorola, C&K Systems, and Oriental Power, on issues spanning from production planning and scheduling, supply chain management to business process re-engineering. He is a member of INFORMS.     

考虑利他行为偏好的动态增长环供应链微分博弈

针对一制造商和一零售商组成的动态闭环供应链系统,分别构建了制造商利他、零售商利他以及双方利他3种行为模式下的Stackelberg微分博弈模型,借助贝尔曼连续型动态规划理论得到了3种利他模式下,制造商的回收努力投入和批发价格策略、零售商的产品销售价格策略、废旧产品回收率以及成员的值函数并进行了对比分析。算例验证了先前结论,进一步分析了制造商利他系数和零售商利他系数对稳态指标的影响,并以自立情形为基准模型,对比分析了3种利他模式下的供应链绩效时间演进规律。研究表明：利他行为是一种正向的社会偏好;制造商的利他行为能够有效地减缓供应链的双重边际效应,提高消费者剩余;零售商的利他行为虽会提高制造商利润,但却以牺牲自身利润为代价,也会使消费者需求量对价格的变动更为敏感;相比之下,双方利他行为是供应链的最优行为模式,可以带来经济、环保、社会三位一体总绩效的提升。     

民族和谐与系统观

本文阐述了研究民族系统的传统方法和系统方法,强调了民族系统演化的条件性、环境性及民族精神的重要性。提出了民族系统的特点,主要包括民族的演化、融合的乘数原理,民族系统的复杂性、长期性,以及民族系统的宗教性。本文认为,民族差异的多样性是民族整体和谐的基础。民族系统是由民族产生的环境、民族的精神和民族的状态三要素构成,并在此基础上阐述了民族的现代化问题。     

基于公众认知与政府引导的邻避舆情演化模型

针对近年邻避群体事件的舆情诱发性,基于公众认知和政府引导视角研究邻避舆情演化问题.首先,通过多案例比较分析,提炼邻避舆情演化的宏观特征,并基于Gompertz模型改进给予刻画;随后,分析个体对邻避项目的微观认知交互行为,运用演化博弈建模来描述个体复制动态;同时,考虑政府通过正面舆论对邻避舆情给予回应,运用信息熵理论和动力学方法构建政府舆论引导的交互熵模型和动力学方程;进而在此基础上,给出"公众-政府"邻避舆情演化模型;最后,讨论该模型均衡点的存在性和稳定性,并以"广东茂名PX事件"的邻避舆情演化为基础案例进行数值仿真研究.结果表明:当公众对邻避项目风险认知偏差较小时,政府应适当尊重邻避舆情,并遵循渐进式的引导路径对邻避舆情给予及时、主动的关切性回应,否则,邻避舆情会愈演愈烈;而当公众对邻避项目风险认知偏差较大时,政府应对邻避舆情加强跟踪和监管,并给予及时、适量的客观回应,否则,邻避舆情会演化到较高稳态.     

云服务环境下的互联网市场结构变迁

在规模经济和网络外部性效应作用下,互联网市场日趋走向"赢者通吃"的垄断型市场结构.然而,云服务的出现降低了竞争门槛并改变了企业成本结构,使在位企业垄断地位受到巨大冲击.本文通过分析"自建服务"和"云服务"两种服务模式特点,建立了在位垄断企业和潜在竞争企业间的市场竞争模型,并提出三个重要命题,研究发现:云服务成本结构、转换成本和市场规模等变量共同影响在位企业和竞争企业的微观市场行为,并最终决定宏观市场结构.本文为理解新兴技术条件下的互联网市场运行机制提供了理论基础.     

基于三角稳定的海上目标航迹抗差关联算法

针对现有航迹抗差关联算法缺乏对海上目标航迹特点和规律的考虑、实际应用效果差的问题，根据典型的实测数据对比分析结果，结合海上目标位置变化慢、空间拓扑关联稳定的特点，以三角形稳定结构为基础，设计了适用于海上目标航迹的抗差关联算法。首先，构建拓扑三角形，通过三角形匹配系数和航迹图匹配系数进行阈值判断，得到航迹对的关联系数。其次，保留其中最大关联系数，构建航迹对关联系数矩阵。最后，采用最大关联系数和阈值判别原则，输出关联航迹。实测数据验证结果表明，所提算法成功实现了所有航迹的有效关联，明显优于对比算法，具有较强的稳定性和鲁棒性，可有效解决实际中海上目标航迹关联问题，实用性强。