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虚拟靶场体系结构设计

计算机辅助设计与图形学学报 2010年第9期22卷 1600-1605页

作者：陈留涛丁刚毅北京理工大学计算机学院北京100081 北京理工大学软件学院北京100081

为了将各种仿真、试验及高性能计算方法应用到靶场试验中来构建虚拟靶场,提高靶场试验的效率.研究了先进模拟与计算(ASC)计划的层次结构,分析了其代码实现框架SIERRA的体系结构,详细阐述了试验与训练使能体系结构(TENA).将ASC中的模拟... 详细信息

为了将各种仿真、试验及高性能计算方法应用到靶场试验中来构建虚拟靶场,提高靶场试验的效率.研究了先进模拟与计算(ASC)计划的层次结构,分析了其代码实现框架SIERRA的体系结构,详细阐述了试验与训练使能体系结构(TENA).将ASC中的模拟试验方法及SIERRA框架中的高性能计算服务与TENA相结合,设计了虚拟靶场体系结构(VRA)及其中间件,其中VRA弥补了TENA在虚拟试验过程中对高性能计算支持不足的缺点.通过导弹攻击战斗机实例的试验结果表明,利用VRA进行虚拟试验可为产品的分析、仿真和试验提供有力支持.

关键词：虚拟靶场体系结构先进模拟与计算试验与训练使能体系结构 SIERRA框架

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基于粒子滤波与神经网络的目标遮挡跟踪

计算机集成制造系统 2020年第12期26卷 3229-3235页

作者：韩宇星丁刚毅北京理工大学软件学院北京100081

为了提高有遮挡情况下目标跟踪的可靠性,提出了基于改进粒子滤波的目标跟踪策略。建立了基于色度等级核函数的直方图模型,提高模型对光照变化的鲁棒性。根据目标的运动信息建立状态方程,采用径向基神经网络建立观测模型,根据模板与定位... 详细信息

为了提高有遮挡情况下目标跟踪的可靠性,提出了基于改进粒子滤波的目标跟踪策略。建立了基于色度等级核函数的直方图模型,提高模型对光照变化的鲁棒性。根据目标的运动信息建立状态方程,采用径向基神经网络建立观测模型,根据模板与定位区的Hellinger距离判断目标是否发生遮挡。当目标未发生遮挡时,利用目标的状态信息更新状态方程并训练观测模型;当目标发生遮挡时,利用粒子滤波将状态方程的计算值和观测模型的预测值进行融合,得到目标状态的最优估计。仿真实验结果表明,采用RBF网络建立目标运动的观测模型能够引入与状态方程不同的预测信息,在较长时间遮挡的情况下,跟踪策略可减小粒子滤波最优估计与实际状态的偏差,提高遮挡情况下目标跟踪的可靠性。

关键词：目标跟踪目标遮挡粒子滤波神经网络直方图模型

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军事协同巡检路线优化策略

兵工学报 2019年第8期40卷 1673-1679页

作者：韩宇星丁刚毅柴作鸿北京理工大学软件学院北京100081 天津工业大学电气工程与自动化学院天津300387

为提高大规模多机器人巡检系统的工作效率,提出了改进的协同蚁群优化算法。该算法为每个巡检机器人设定一个路线优化蚁群,采用共享禁忌表的方式实现不同蚁群之间的信息共享,不同蚁群中的人工蚁采用代价竞争机制进行巡检节点选择,完成路... 详细信息

为提高大规模多机器人巡检系统的工作效率,提出了改进的协同蚁群优化算法。该算法为每个巡检机器人设定一个路线优化蚁群,采用共享禁忌表的方式实现不同蚁群之间的信息共享,不同蚁群中的人工蚁采用代价竞争机制进行巡检节点选择,完成路线协同优化。协同蚁群优化算法能够根据巡检节点的分布完成巡检区域的分割与路线优化,提高了巡检区域划分的合理性。仿真实验结果表明,与基于地图分割的优化算法相比,协同蚁群优化算法能够根据巡检任务对巡检区域进行均衡划分,提高了巡检机器人的利用率,减少了整体巡检量,巡检效率得到了显著提升。

关键词：协同巡检蚁群算法路线优化多机器人禁忌表

Natural vibration and critical velocity of translating Timoshenko beam with non-homogeneous boundaries

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Applied Mathematics and Mechanics(English Edition) 2024年第9期45卷 1523-1538页

作者： Yanan LI Jieyu ding Hu ding Liqun CHEN Shanghai Institute of Applied Mathematics and Mechanics Shanghai Key Laboratory of Mechanics in Energy EngineeringShanghai Frontier Science Center of MechanoinformaticsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai 200072China School of Mathematics and Statistics Qingdao UniversityQingdao 266071Shandong ProvinceChina

In most practical engineering applications,the translating belt wraps around two fixed *** boundary conditions of the dynamic model are typically specified as simply supported or fixed *** this paper,non-homogeneous boundaries are introduced by the support *** the translating belt as the mechanical prototype,the vibration characteristics of translating Timoshenko beam models with nonhomogeneous boundaries are investigated for the first *** governing equations of Timoshenko beam are deduced by employing the generalized Hamilton's *** effects of parameters such as the radius of wheel and the length of belt on vibration characteristics including the equilibrium deformations,critical velocities,natural frequencies,and modes,are numerically calculated and *** numerical results indicate that the beam experiences deformation characterized by varying curvatures near the *** radii of the wheels play a pivotal role in determining the change in trend of the relative difference between two beam *** the results unearths that the relative difference in equilibrium deformations between the two beam models is more pronounced with smaller-sized *** the two wheels are of equal size,the critical velocities of both beam models reach their respective *** addition,the relative difference in natural frequencies between the two beam models exhibits nonlinear variation and can easily exceed 50%.Furthermore,as the axial velocities increase,the impact of non-homogeneous boundaries on modal shape of translating beam becomes more *** dealing with non-homogeneous boundaries is challenging,beam models with non-homogeneous boundaries are more sensitive to parameters,and the differences between the two types of beams undergo some interesting variations under the influence of non-homogeneous boundaries.

关键词： translating beam Timoshenko beam non-homogeneous boundary natural frequency critical velocity

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超高清视频纹理的实时仿真方法

系统仿真学报 2023年第8期35卷 1748-1756页

作者：刘杨杨丁刚毅闫大鹏薛彤北京理工大学计算机学院北京100081

随着超高清视频技术的发展与推广,如何快速地仿真超高清视频纹理逐渐成为重要问题。为了仿真的完备性与高效性,需要在提高视频纹理质量的同时,提升仿真的显示帧率,为此提出了超高清视频纹理的实时仿真流程。基于GPU并行设计了视频纹理... 详细信息

随着超高清视频技术的发展与推广,如何快速地仿真超高清视频纹理逐渐成为重要问题。为了仿真的完备性与高效性,需要在提高视频纹理质量的同时,提升仿真的显示帧率,为此提出了超高清视频纹理的实时仿真流程。基于GPU并行设计了视频纹理的快速生成算法,基于共享纹理设计了快速数据传输算法,解决了解码与转码的耗时问题。在仿真引擎的基础上实现了超高清视频纹理的实时仿真系统。实验结果表明:该方法能够有效减少视频纹理生成的时间,提高超高清视频纹理仿真的速度。

关键词：超高清实时仿真视频纹理共享纹理 8k

Whittle’s Index Based Sensor Scheduling for Multiprocess Systems Under DoS Attacks

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Journal of Systems Science & Complexity 2024年第1期37卷 329-350页

作者： CAI Zai ding Kemi Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and TechnologyShenzhen 518055China.

In this paper,the authors consider how to design defensive countermeasures against DoS attacks for remote state estimation of multiprocess *** each system,a sensor will measure its state and transmits the data packets through an unreliable channel which is vulnerable to be jammed by an *** limited communication bandwidth,only a subset of sensors are allowed for data transmission,and how to select the optimal one to maximize the accuracy of remote state estimation is the focus of the proposed *** authors first formulate this problem as a Markov decision process and investigate the existence of optimal ***,the authors demonstrate the piecewise monotonicity structure of optimal *** the difficulty of obtaining an optimal policy of large-scale problems,the authors develop a suboptimal heuristic policy based on the aforementioned policy structure and Whittle’s ***,a closed form of the indices is derived in order to reduce implementation complexity of proposed scheduling policy and numerical examples are provided to illustrate the proposed developed results.

关键词： DoS attacks Kalman filter remote state estimation Whittle’s index.

Deep structure of the Southeast Asian curved subduction system and its dynamic process

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Journal of Oceanology and Limnology 2024年第3期42卷 701-704页

作者： Weiwei ding Key Laboratory of Submarine Geoscience&Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China

The deep structure,material circulation,and dynamic processes in the Southeast Asia have long been an elusive scientific puzzle due to the lack of systematic scientific observations and recognized theoretical *** on the deep seismic tomography using long-period natural earthquake data,in this study,the deep structure and material circulation of the curved subduction system in Southeast Asia was studied,and the dynamic processes since 100 million years ago was *** is pointed out that challenges still exist in the precise reconstruction of deep mantle structures of the study area,the influence of multi-stage subduction on deep material exchange and shallow magma activity,as well as the spatiotemporal evolution and coupling mechanism of multi-plate *** work should focus on high-resolution land-sea joint 3-D seismic tomography imaging of the curved subduction system in the Southeast Asia,combined with geochemical analysis and geodynamic modelling works.

关键词： curved subduction system deep structure material recycling dynamic process Southeast Asia

A vertical track nonlinear energy sink

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 931-946页

作者： Meng LI Hu ding Shanghai Key Laboratory of Mechanics in Energy Engineering School of Mechanics and Engineering ScienceShanghai Frontier Science Center of MechanoinformaticsShanghai UniversityShanghai 200444China

Eliminating the effects of gravity and designing nonlinear energy sinks(NESs)that suppress vibration in the vertical direction is a challenging task with numerous damping *** this paper,the dynamic design of a vertical track nonlinear energy sink(VTNES)with zero linear stiffness in the vertical direction is proposed and realized for the first *** motion differential equations of the VTNES coupled with a linear oscillator(LO)are *** the strong nonlinearity considered of the VTNES,the steady-state response of the system is analyzed with the harmonic balance method(HBM),and the accuracy of the HBM is verified *** this basis,the VTNES prototype is manufactured,and its nonlinear stiffness is *** damping effect and dynamic characteristics of the VTNES are studied theoretically and *** results show that the VTNES has better damping effects when strong modulation responses(SMRs)***,even for small-amplitude vibration,the VTNES also has a good vibration suppression *** sum up,in order to suppress the vertical vibration,an NES is designed and developed,which can suppress the vertical vibration within certain ranges of the resonance frequency and the vibration intensity.

关键词： track nonlinear energy sink(TNES) vertical direction gravity nonlinear stiffness harmonic balance method(HBM) vibration control

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基于密集人群的表演行为建模与仿真方法研究

系统仿真学报 2021年第7期33卷 1617-1625页

作者：李弋豪黄天羽李鹏丁刚毅北京理工大学计算机学院北京100081 数字表演与仿真技术北京市重点实验室北京100081

密集人群的表演行为仿真由于人群组织复杂度高,表演行为抽象困难等原因极度依赖手工编排,难以建立高自动化的仿真模型。为了降低创意修改敏感度与设计风险,提出了一种基于密集人群的表演行为模型,通过时间维度切片与空间分层的策略实现... 详细信息

密集人群的表演行为仿真由于人群组织复杂度高,表演行为抽象困难等原因极度依赖手工编排,难以建立高自动化的仿真模型。为了降低创意修改敏感度与设计风险,提出了一种基于密集人群的表演行为模型,通过时间维度切片与空间分层的策略实现了能够符合导演创意的高自动化人群表演行为仿真方法。通过构建仿真实验,对模型中的人群表演行为规划方法的生成效果与计算效率进行分析,将其应用于庆祝中华人民共和国成立70周年主题表演活动,证明了该方法的先进性。

关键词：人群仿真群体运动控制表演行为模型多层结构