科创中国

由于后勤系统专业众多、结构庞杂、流程复杂、易受随机干扰且难用定量描述,同时后勤系统的仿真在仿真机理、模型粒度和时钟推进等方面与作战仿真存在不同,长期以来,在军事仿真系统的研发中后勤保障问题常被简化甚至忽略.随着现代军事变革的发展,作战与后勤呈现出新的融合趋势,后勤保障与前方作战的结合越来越紧密,发展能够体现现代战争特点、作战与后勤一体的军事仿真系统已是必然趋势.在分析现代作战后勤系统特点的基础上,采用多智能体技术,构建了作战后勤一体化仿真系统的体系框架,建立了仿真系统中几类主要Agent的行为模型,给出了部分关键技术解决方法,并在Cougaar环境下实现了原型系统.

针对分布式多Agent通信系统结构的特点,将多Agent通信过程划分为通信信息查询过程和数据交互过程,通过分析这两个过程的实现原理与特点,提出采用分布式的信息管理方法和点对点的Agent通信方式解决多Agent系统的通信拥挤问题,并设计了基于消息驱动的多Agent通信系统,实现分布式环境下多Agent的高效通信,并应用于基于Agent的多UUV分布仿真系统中,满足了该仿真系统的需求.

大规模人工社会仿真是研究社会科学的有效手段,日益发展的高性能计算资源,如GPU等为发展大规模人工社会仿真研究带来了新的机遇.基于保守同步时间策略提出了一种CPU/GPU异构协同的仿真引擎架构,CPU与GPU协同独立地完成模型的调度和执行.详细阐述了GPU并行仿真内核设计方法,针对大规模人工社会仿真的模型特点,对数据结构,调度算法等进行了重点分析.通过3层引擎管理架构,保证了各CPU与GPU之间的时间同步和消息通信的完成.最后以GameOfLife测试模型对GPU并行仿真内核的运行效率进行了评估,获得了相对CPU最高11.2倍的性能加速.

随着区域产业结构的调整和生产方式的转变,产业集群竞争优势的来源已经由原有的物质资源转变为积淀于产业集群本地的知识资源.作为集群知识的动态累积过程,企业间知识传播的研究近年来备受关注,根据集群企业的知识属性将企业划分为缺乏知识类、掌握知识类和升级知识类三种类型,并借用传染病模型讨论了集群内同质企业之间知识传播的机理,推演出了集群内知识传播过程中三类企业的动态平衡状态,并进一步构建了agent仿真模型进行验证;分析后发现,政府和中介组织的活动是影响知识传播再生数的重要因素,进而知识传播的动态平衡点.

多智能体(代理)系统(Multi-Agent System,MAS)是基于实体建模的、分布式离散事件驱动的仿真方法,其中实体行为的描述和协同一直是持续研究的难点问题.基于Cougaar体系结构,根据混合型Agent的定义,针对Multi-Agent的实体建模提出了一种通用描述方法,简化了实体Agent建模描述,方便定义Agent之间的关系.设计实现了一个高性能的协同算法,把实体Agent分为总控Agent和仿真Agent两类,通过集中式控制方法进行时钟同步,仿真Agent按需进行时间同步,能够有效降低实际仿真中的硬件资源消耗,实现高效的时间同步.各个Agent的仿真时间推进步长可以自适应变化,取得仿真性能和仿真精度之间的平衡.

建模仿真是研究网络攻防的一种行之有效的手段.在研究DDoS主动防御理论模型的基础上,基于多Agent建模思想建立了DDoS主动防御多Agent模型;基于网络仿真软件OMNe T++建立了DDoS主动防御仿真模型;针对网络仿真软件操作复杂等问题,采用MFC开发工具对OMNe T++进行二次开发,构建了具有友好界面的DDoS主动防御仿真验证演示系统.进行了DDoS攻击与主动防御仿真实验.实验结果证明了所建模型的正确性和仿真验证演示系统的可用性.为进一步研究网络安全仿真提供了模型和平台支持.

The existing research of the integrated chassis control mainly focuses on the different evaluation indexes and control strategy. Among the different evaluation indexes, the comprehensive properties are usually not considered based on the non-linear superposition principle. But, the control strategy has some shortages on tyre model with side-slip angle, road adhesion coefficient, vertical load and velocity. In this paper, based on belief, desire and intention(BDI)-agent model framework, the TYRE agent, electric power steering(EPS) agent and active suspension system(ASS) agent are proposed. In the system(SYS) agent, the coordination mechanism is employed to manage interdependences and conflicts among other agents, so as to improve the flexibility, adaptability, and robustness of the global control system. Due to the existence of the simulation demand of dynamic performance, the vehicle multi-body dynamics model is established by SIMPACK. And then the co-simulation analysis is conducted to evaluate the proposed multi-agent system(MAS) controller. The simulation results demonstrate that the MAS has good effect on the performance of EPS and ASS. Meantime, the better road feeling for the driver is provided considering the multiple and complex driving traffic. Finally, the MAS rapid control prototyping is built to conduct the real vehicle test. The test results are consistent to the simulation results, which verifies the correctness of simulation. The proposed research ensures the driving safety, enhances the handling stability, and improves the ride comfort.

提出了一个基于社会圈子理论的agent吸毒人群网络HIV传播的模型.该模型由具有小社会圈子的一般人群和具有较大社会圈子的关键人物在社会圈子网络中寻找相应的结点相互连接,形成小团体内强连接和小团体之间弱连接的动态吸毒人群社会网络.社会网络中可以同时模拟共用针具吸毒HIV传播、社会影响和个体在团体之间移动的相互影响.仿真实验中通过调整模型参数研究圈子大小,社会影响因子和个体移动概率对HIV传播的影响.实验结果表明,该模型正确地反映了共用针具吸毒人群网络HIV传播的特点.

The rapid expansion of enterprises makes product collaborative design(PCD)a critical issue under the distributed heterogeneous environment,but as the collaborative task of large-scale network becomes more complicated,neither unified task decomposition and allocation methodology nor Agent-based network management platform can satisfy the increasing demands.In this paper,to meet requirements of PCD for distributed product development,a collaborative design mechanism based on the thought of modularity and the Agent technology is presented.First,the top-down 4-tier process model based on task-oriented modular and Agent is constructed for PCD after analyzing the mapping relationships between requirements and functions in the collaborative design.Second,on basis of sub-task decomposition for PCD based on a mixed method,the mathematic model of task-oriented modular based on multi-objective optimization is established to maximize the module cohesion degree and minimize the module coupling degree,while considering the module executable degree as a restriction.The mathematic model is optimized and simulated by the modified PSO,and the decomposed modules are obtained.Finally,the Agent structure model for collaborative design is put forward,and the optimism matching Agents are selected by using similarity algorithm to implement different task-modules by the integrated reasoning and decision-making mechanism with the behavioral model of collaborative design Agents.With the results of experimental studies for automobile collaborative design,the feasibility and efficiency of this methodology of task-oriented modular and Agent-based collaborative design in the distributed heterogeneous environment are verified.On this basis,an integrative automobile collaborative R&D platform is developed.This research provides an effective platform for automobile manufacturing enterprises to achieve PCD,and helps to promote product numeralization collaborative R&D and management development.

通用开放网络仿真器CORE采用轻量级容器虚拟化技术仿真节点、协议和链路等网络资源,使得上层网络应用不需要修改就可以直接在仿真环境下运行.分析了CORE仿真器的程序组成和实现原理,指出受CPU计算能力等因素的影响,其仿真性能存在瓶颈,并通过一组实验分析了多处理器、网络多队列、多流量等条件下CORE的网络仿真性能.