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Person video alignment with human pose registration

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Frontiers of Computer Science 2023年第4期17卷 229-231页

作者： Yu ZHANG Zihua WANG jingyang zhou Siya MI School of Computer Science and Engineering and the Key Lab of Computer Network and Information Integration(Ministry of Education)Southeast UniversityNanjing 211189China School of Cyber Science and Engineering Southeast UniversityNanjing 211189China Purple Mountain Laboratories Nanjing 211111China

1 Introduction and main *** alignment,especially human action alignment,is a challenging *** purpose is to develop an algorithm to match the same process so that videos can be *** the progress that has been made in image recognition,it is still a difficult problem for distinguishing from similar frames for alignment without context information.

关键词： alignment video frames

Security-constrained Transmission Maintenance Optimization Considering Generation and Operational Risk Costs

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 767-781页

作者： Dan Xu Zhi Cai Qian Cheng Guodong Huang jingyang zhou Junjie Tang Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research InstituteBeijing 100192China State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing UniversityChongqing 400044China

With the large-scale integration of renewable energy,the traditional maintenance arrangement during the load valley period cannot satisfy the transmission demand of renewable energy ***,in a market-oriented operation mode,the power dispatching control center aims to reduce the overall power purchase cost while ensuring the security of the power ***,a security-constrained transmission maintenance optimization model considering generation and operational risk costs is proposed *** model is built on double-layer optimization framework,where the upper-layer model is used for maintenance and generation planning,and the lowerlayer model is primarily used to address the operational security risk arising from the random prediction error and N-1 transmission ***,a generation-maintenance iterative algorithm based on a defined cost feedback is included to increase solution *** cost is determined using long-term security-constrained unit commitment,and the operational risk cost is obtained using a double-layer N-1 risk assessment *** electrical correlation coupling coefficient is proposed for the solution process to avoid maintenance of associated equipment simultaneously,thereby improving model convergence *** IEEE 118-bus system is used as a test case for illustration,and test results suggest that the proposed model and algorithm can reduce the total cost of transmission maintenance and system operation while effectively improving the solution efficiency of the joint optimization model.

关键词： Transmission maintenance security-constrained unit commitment iterative algorithm cost feedback N−1 risk assessment

Mobile agent-enabled framework for structuring and building distributed systems on the internet

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Science in China(Series F) 2006年第6期49卷 885-905页

作者： CAO Jiannong zhou jingyang ZHU Weiweit LI Xuhui Internet and Mobile Computing Lab Department of Computing Hong Kong Polytechnic University Hung Hom KLW Hong Kong China State Key Lab of Novel Software Technologies Nanjing University Nanjing 210093 China State Key Lab of Software Engineering Wuhan University Wuhan 430072 China

Mobile agent has shown its promise as a powerful means to complement and enhance existing technology in various application areas. In particular, existing work has demonstrated that MA can simplify the development and improve the performance of certain classes of distributed applications, especially for those running on a wide-area, heterogeneous, and dynamic networking environment like the Internet. In our previous work, we extended the application of MA to the design of distributed control functions, which require the maintenance of logical relationship among and/or coordination of processing entities in a distributed system. A novel framework is presented for structuring and building distributed systems, which use cooperating mobile agents as an aid to carry out coordination and cooperation tasks in distributed systems. The framework has been used for designing various distributed control functions such as load balancing and mutual ex- clusion in our previous work. In this paper, we use the framework to propose a novel approach to detecting deadlocks in distributed system by using mobile agents, which demonstrates the advantage of being adaptive and flexible of mobile agents. We first describe the MAEDD （Mobile Agent Enabled Deadlock Detection） scheme, in which mobile agents are dispatched to collect and analyze deadlock information distributed across the network sites and, based on the analysis, to detect and resolve deadlocks. Then the design of an adaptive hybrid algorithm derived from the framework is presented. The algorithm can dynamically adapt itself to the changes in system state by using different deadlock detection strategies. The performance of the proposed algorithm has been evaluated using simulations. The results show that the algorithm can outperform existing algorithms that use a fixed deadlock detection strategy.

关键词： mobile agent internet computing distributed systems deadlock detection.

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基于引入虚拟负荷的发电机暂态稳定预测

电工技术学报 2008年第3期23卷 103-107,130页

作者：李琰周孝信周京阳中国电力科学研究院北京10085

提出了基于引入虚拟负荷的发电机暂态稳定预测方法,当系统受到扰动时,将系统降阶化简成仅仅含有发电机机端相量测量单元(PMU)测点的系统,在每个保留节点引入简化的虚拟负荷模型,来反映系统降阶过程中除保留节点外其他各个元件模型参数... 详细信息

提出了基于引入虚拟负荷的发电机暂态稳定预测方法,当系统受到扰动时,将系统降阶化简成仅仅含有发电机机端相量测量单元(PMU)测点的系统,在每个保留节点引入简化的虚拟负荷模型,来反映系统降阶过程中除保留节点外其他各个元件模型参数改变和网络拓扑变化对降阶后网络的影响,并利用毫秒级PMU量测来对各个虚拟负荷模型的参数进行辨识修正,然后再与相应的发电机方程联合,实现系统受扰轨迹预测。通过6机25节点和10机39节点系统对该算法的验证,表明了该算法的有效性。

关键词：相量测量单元虚拟负荷模型参数辨识与修正轨迹预测

基于启发式线性规划的大规模安全约束调度快速求解方法

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电力系统保护与控制 2019年第23期47卷 131-137页

作者：许丹蔡帜周京阳中国电力科学研究院

提升大规模安全约束经济调度优化模型的求解性能是开展大电网跨省区电力电量全局优化平衡的前提与基础。首先分析问题的物理特性,通过并行计算求解不考虑机组爬坡约束的分时段约束松弛模型。基于对松弛解的分析获得可用于指导安全约束... 详细信息

提升大规模安全约束经济调度优化模型的求解性能是开展大电网跨省区电力电量全局优化平衡的前提与基础。首先分析问题的物理特性,通过并行计算求解不考虑机组爬坡约束的分时段约束松弛模型。基于对松弛解的分析获得可用于指导安全约束经济调度模型改进的有用信息,以约束剔除和约束增加的方式提出了基于启发式线性规划的大规模安全约束经济调度快速求解方法。将所提算法运用于新英格兰10机扩展系统和中国实际电网,验证了所提算法的正确性和有效性。

关键词：安全约束经济调度爬坡约束约束松弛启发式算法

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基于新增虚拟节点的系统受扰轨迹预测

电力系统自动化 2007年第12期31卷 19-22页

作者：李琰周孝信周京阳中国电力科学研究院北京市100085

提出了基于新增虚拟节点的多机系统受扰轨迹预测方法。首先从对系统受扰在线分析入手,结合状态估计或潮流数据,将系统降阶成只含有配置同步相量测量单元(PMU)测点的发电机节点系统,然后引入虚拟节点,通过该节点和各个保留节点之间的导... 详细信息

提出了基于新增虚拟节点的多机系统受扰轨迹预测方法。首先从对系统受扰在线分析入手,结合状态估计或潮流数据,将系统降阶成只含有配置同步相量测量单元(PMU)测点的发电机节点系统,然后引入虚拟节点,通过该节点和各个保留节点之间的导纳改变,反映原系统中其他各个元件模型参数变化和网络拓扑参数变化,并利用毫秒级PMU量测对其进行修正,得到降阶后系统节点电压、电流关系传递矩阵,通过发电机方程和网络连接模型,与相应的发电机方程联合,实现系统受扰轨迹预测。10机39节点系统对该算法的验证表明了该算法的有效性。

关键词：轨迹预测相量测量单元多机系统虚拟节点

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基于拍卖算法的相控阵雷达任务调度方法

系统工程与电子技术 2018年第8期40卷 1736-1742页

作者：李波周静杨高晓光西北工业大学电子信息学院陕西西安710129

灵活有效的驻留时间调度算法是实现多功能相控阵雷达(phased array radar,PAR)工作性能优化和资源合理利用的基础。通过将时间作为拍卖物品,待调度任务作为竞拍者,设计了基于拍卖算法的PAR调度方案。该算法结合PAR的任务调度原则,以任... 详细信息

灵活有效的驻留时间调度算法是实现多功能相控阵雷达(phased array radar,PAR)工作性能优化和资源合理利用的基础。通过将时间作为拍卖物品,待调度任务作为竞拍者,设计了基于拍卖算法的PAR调度方案。该算法结合PAR的任务调度原则,以任务优先级原则和时间利用原则为标准,建立了拍卖者所得利润的竞拍价值函数。以期望执行时间原则为标准,给出了竞拍者的竞标期望函数。仿真结果显示,当PAR调度任务处于饱和时,所用算法的任务调度成功率和实现价值率依然较高,能够满足任务对平均时间偏移率的较低要求,并且能够保障高优先级任务的优先调度。

关键词：多功能相控阵雷达拍卖算法自适应任务调度综合优先级

Robust Nonlinear Control for Slewing Maneuvers of Space Structures Driven by Synchronous Twin-Gyro Precession

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Robust Nonlinear Control for Slewing Maneuvers of Space Stru...

计及直流限额动态调整的送受端一体化日前调度计划模型

第25届中国控制会议

作者： zhou Di,zhou jingyang,Duan Guangren Harbin Institute of Technology, Harbin 150001,China

＜正＞The slewing motion control of a truss arm driven by a V-gimbaled control-moment-gyro is a nonlinear control problem. The V-gimbaled control-moment-gyro consists of a pair of gyros that must precess synchronously. Based on the feedback linearization technique, the nonlinear nominal model is partially linearized by specifically choosing two output functions to satisfy the system tracking and synchronization requirements. For the partially linearized system,a robust nonlinear controller is designed by using the recursive Lyapunov design method. The performance of the proposed controller is verified by simulation.

关键词： Robust Control Nonlinear Control Control Moment Gyro Synchronization

来源： cnki会议评论

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电工技术学报 2021年第13期36卷 2844-2851页

作者：许丹周京阳黄国栋中国电力科学研究院北京100192

通过特高压直流输电将能源基地的大规模电能送往负荷中心是我国电网的一种常态化运行方式。直流计划与送受端发电计划分阶段协调模式及直流输电限额可能受制于受端电网运行方式使得安全约束机组组合问题难以获得全局最优解。该文将开机... 详细信息

通过特高压直流输电将能源基地的大规模电能送往负荷中心是我国电网的一种常态化运行方式。直流计划与送受端发电计划分阶段协调模式及直流输电限额可能受制于受端电网运行方式使得安全约束机组组合问题难以获得全局最优解。该文将开机台数、开机容量、备用容量等电网方式信息对直流限额的影响纳入机组组合模型,提出了计及直流限额动态调整的送受端一体化日前调度计划优化模型。针对模型中约束边界条件随决策变量动态变化的问题,通过引入0-1指示变量,将复杂逻辑约束转变成混合整数规划问题,确保了模型的有效求解。将所提模型应用于新英格兰10机39节点标准算例和我国某省级电网,验证了所提模型的正确性和有效性。

关键词：发电计划直流计划安全约束机组组合稳定限额