基于三点法的地空导弹攻击过程可视化仿真

地空导弹攻击过程可视化仿真包括数学模型的建立和可视化场景的实现,精确的数学模型是场景高度逼真的前提.分析了地空导弹在空气动力、发动机推力和重力作用下的受力情况,建立了在三点法引导时导弹攻击过程的运动方程组,并给出了目标在蛇形机动时导弹相应的三维弹道曲线.最后运用OpenGL图形库,研究了天空、地面以及导弹飞行尾焰和爆炸场景等特殊效果的生成方法,实现了导弹攻击过程的可视化仿真,较精确地再现了三点法引导时地空导弹的飞行过程.     

舰艇箔条质心干扰模型与仿真研究

舰艇箔条质心干扰模型是舰艇防御仿真系统的重要组成部分,在大地经纬度高度坐标系内它构建了包括舰艇.干扰云,导弹模型及能确定反舰导弹末制导雷达跟踪点空间位置的质心干扰效果评判三维模型等.应用这些模型,对导弹攻击舰艇、干扰弹发射、干扰云干扰导弹的全过程中舰艇、干扰云和导弹的空间位置,速度及方向进行了实时的仿真计算.通过仿真说明模型是可行的.     

导弹仿真中海浪的数字仿真及其动画生成

根据某型潜射导弹仿真的需要,利用海浪谱,用线性叠加法建立了海浪的数学模型。在此基础上,用法线扰动法生成了三维海浪动画,应用于导弹攻击过程的动态模拟     

战斗机使用空射诱饵弹协同规避策略

以战斗机携带空射诱饵弹被空空导弹攻击为背景,对战斗机使用空射诱饵弹协同规避导弹攻击进行研究。建立了战斗机、空射诱饵弹及相对运动模型;分析研究了协同规避导弹攻击原理,建立了协同规避关键技术模型。在分阶段构建协同规避决策指标函数的基础上,建立了协同规避导弹攻击模型,提出了一种基于粒子群算法的战斗机使用空射诱饵弹协同规避方法。最后进行仿真验证,结果表明该方法能有效利用空射诱饵弹对目标进行欺骗,提高我方战斗机在被导弹攻击过程中的生存力。     

宽频反辐射导弹的攻击过程建模及Matlab仿真

详细分析了宽频反辐射导弹攻击辐射源的主要过程,包括空间信号传输、电子信号接收、电子信号处理、测向定位和导弹导引控制环节,给出了各环节的教学模型.利用Matlab开发环境,从作战指挥角度出发,设计并实现了多辐射源抗宽频带反辐射导弹攻击效果的仿真系统.系统可以对辐射源信号发射频率,辐射功率、辐射源相对位王、辐射源工作时序等参数进行灵活设置,为多辐射源抗反辐射导弹攻击策略研究提供了一个有效的仿真平台.     

防区外导弹联合攻击武器系统攻防对抗仿真

针对防区外导弹联合攻击武器系统攻防对抗过程,通过计算机仿真方法对其进行研究。基于攻防对抗战场想定分析了防区外导弹联合攻击武器系统攻防对抗的体系结构和对抗特点,建立了仿真体系中各模块的数学模型。采用模块化和面向对象的仿真建模方法得到了防区外导弹联合攻击武器系统攻防对抗仿真软件,从而对整个对抗过程进行仿真研究。该软件通用性强,可以对不同作战环境和武器力量配置条件下的攻防对抗进行仿真研究,不仅使整个对抗过程可视,而且可以对防真结果数据进行统计分析,为防区外导弹联合攻击武器系统攻防对抗作战决策提供参考。     

战术防空指挥控制仿真模型

战术防空指挥控制仿真模型较多,本文针对防空导弹群指挥控制系统的需要,选择介绍一些主要的仿真模型:通信网络模型、自然环境模型、目标攻击模型、空情获取模型和导弹拦截模型。     

中程空空导弹火控系统评定基准研究

通过讨论某型半主动雷达制导中程空空导弹的五自由度模型的建立和仿真 ,得到了该型导弹的精确弹道数据和攻击区仿真图形 ,为该型导弹的弹道和攻击区数据的试飞评定奠定了基础。给出的模型和设计方法也可用于其它型号中程空空弹的火控仿真计算 ,具有一定的通用性。     

巡逻攻击导弹作战仿真系统研究

为了跟踪研究巡逻攻击导弹的远程控制、数据链与精确制导武器之间配合等技术问题,针对巡逻攻击导弹开展了作战仿真研究,具有极其重要的意义.基于HLA对巡逻攻击导弹作战仿真系统仿真结构进行了研究,并重点研究了数据链控制仿真、导弹系统控制仿真等核心技术问题,基于成熟的"Creator+Vega+VC"视景仿真方法进行了系统初步实现,满足了系统演示论证需要.     

基于HLA和VR的防空导弹作战仿真系统研究

应用分布交互式仿真高层体系结构(HLA)和虚拟现实技术,结合防空导弹武器系统仿真背景,研究开发了基于HLA的分布交互式防空导弹武器作战仿真系统,并对开发过程中的关键技术:三维实体建模、三维实体模型在虚拟场景中的集成、驱动和显示、HLA联邦的开发、联邦成员的实现进行了研究。     

The 12th International Conference on Service Systems and Service Management ICSSSM'15

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Enterprise resource planning implementation decision & optimization models

To study the uncertain optimization problems on implementation schedule, time-cost trade-off and quality in enterprise resource planning (ERP) implementation, combined with program evaluation and review technique (PERT), some optimization models are proposed, which include the implementation schedule model, the timecost trade-off model, the quality model, and the implementation time-cost-quality synthetic optimization model. A PERT-embedded genetic algorithm (GA) based on stochastic simulation technique is introduced to the optimization models solution. Finally, an example is presented to show that the models and algorithm are reasonable and effective, which can offer a reliable quantitative decision method for ERP implementation.     

THE 8~(th) INTERNATIONAL CONGRESS ON INDUSTRIAL AND APPLIED MATHEMATICS

正August 10-14,2015Beijing,China The International Congress on Industrial and Applied Mathematics(IClAM)is the premier international congress in the field ofapplied mathematics held every four years under the auspices ofthe International Council for Industrial and Applied Mathematics.From August 10 to 14,2015,mathematicians,scientists and entrepreneurs fiom around the world will gather in Beijing,China for the 8th IClAM to be held at     

A calculus for services innovation

Innovation in the services area - especially in the electronic services （e-services） domain - can be systematically developed by first considering the strategic drivers and foci, then the tactical principles and enablers, and finally the operational decision attributes, all of which constitute a process or calculus of services innovation. More specifically, there are four customer drivers （i.e., collaboration, customization, integration and adaptation）, three business foci （i.e., creation-focused, solution-focused and competition-focused）, six business principles （i.e., reconstruct market boundaries, focus on the big picture not numbers, reach beyond existing demand, get strategic sequence right, overcome organizational hurdles and build execution into strategy）, eight technical enablers （i.e., software algorithms, automation, telecommunication, collaboration, standardization, customization, organization, and globalization）, and six attributes of decision informatics （i.e., decision-driven, information-based, real-time, continuously-adaptive, customer-centric and computationally-intensive）. It should be noted that the four customer drivers are all directed at empowering the individual - that is, at recognizing that the individual can, respectively, contribute in a collaborative situation, receive customized or personalized attention, access an integrated system or process, and obtain adaptive real-time or just-in-time input. The developed process or calculus serves to identify the potential white spaces or blue oceans for innovation. In addition to expanding on current innovations in services and related experiences, white spaces are identified for possible future innovations; they include those that can mitigate the unforeseen consequences or abuses of earlier innovations, safeguard our rights to privacy, protect us from the always-on, interconnected world, provide us with an authoritative search engine, and generate a GDP metric that can adequately measure the growing knowledge economy,     

论生物系统中的功能不守恒性

根据能量守恒定律，能量一次转换所做的总功应等于输入的总能量。但在生物系统中，能量的转换是多次的，其总功之和大于系统输入的总能量，此现象称之为功能不守恒性。能量转换效率越高，功能差别越大。能量通过细胞水平的多次转换，总功可提高至2倍左右。能量通过生态系统水平多次转换，总功可提高至1．4倍左右。通过系统内各子系统能流之和称为序能，反映了系统有序性大小，它取决于系统输入总能量和能量转换效率。根据序能原理，用GDP^2／9(GDP为国内生产总值，Q为能量总输入)反映人类社会功能和效率，要比单纯用GDP更客观。绿色GDP应同时考虑使GDP^2／Q增长最大和使自然生态系统的序能最大。人的经济行为和动物的行为对策也符合序能原理。     

Dealing with Human Relations in Chinese Systems Practice

This paper is about the Wuli, Shili, Renli (WSR) systems methodology. An important concept within this, Renli, has been developed from Confucian philosophy to clarify to Chinese researchers the necessity of dealing with human relations in systems practice. At present, the only formal means of operationalizing Renli that people are exploring in China is to import from the West methods for organizing debate. However, the concept of Renli suggests that more is needed than methods alone. In particular, facilitation skills are required. It is argued that the development of facilitation skills can be enhanced if researchers can gain both theoretical and practical knowledge of group dynamics, and engage in activities of self-reflection to look at, and alter, their own roles in these dynamics and the wider sociopolitical system. There are therefore three aspects to Renli: the use of systems methods for organizing debate, the acquisition of facilitation skills, and self-reflection geared toward the development of facilitation skills and enhanced critical awareness of the politics of intervention.     

云环境中邮件服务器面向传输的优化设计

随着云计算的发展,新的应用不断涌现,但电子邮件服务依然占有着重要的地位.邮件服务器是一种I/O密集的应用.在云计算时代,越来越多的用户邮件保存在服务器端,邮件在从客户端传输到服务器端之前,邮件或者邮件的部分内容在服务器端可能已经存在.基于这种现象,提出了一种方案,通过引入计算的代价来降低通信量,从而提高邮件服务器的处理能力.对电子邮件的格式和SMTP协议进行了扩充,引入了附件和正文分离传输的模式.在邮件传输时,客户端先计算附件的散列值,并作为正文的一部分传输到服务器端,服务器端再根据散列值来判断附件是否需要传输.     

金工工艺的优化设计

运用价值工程与运筹工程理论, 在金工工艺单项设计指标优化的基础上, 对其设计指标也进行了全面优化。     

高速低复杂度可重构L&R算法研究与实现

为满足卫星有效载荷数据传输系统高速、高可靠性的需求, 提出一种基于L&R(Luise and Reggiannini)算法的高速低复杂度可重构频偏恢复实现方案。为便于算法逻辑架构实现, 对算法的函数功能进行分解及模块化设计; 为减少乘法器资源消耗, 采用复用分解的自相关函数模块; 为提高L&R算法的精度, 对导频段自相关函数进行多段叠加。结果表明, 高速低复杂度可重构频偏恢复实现方案解调性能损失接近为0 dB, 且优化后的算法结构相比于直接结构可减少92.59%的乘法器消耗, 拆分的自相关函数功能模块具有可复用性和重构性。该算法的可工作时钟速率高达370.37 MHz, 在高速接收机中具有极高的应用价值。