检索结果-内蒙古大学图书馆

Chaos Control of a Chemical Chaotic system via Time-delayed Feedback Control Method

International Journal of Automation and computing 2014年第4期11卷 392-398页

作者： Chang-Jin Xu Yu-Sen Wu Guizhou Key Laboratory of Economics System Simulation Guizhou University of Finance and Economics School of Mathematics and Statistics Henan University of Science and Technology

In this paper, the control of chemical chaotic dynamical system is investigated by time-delayed feedback control *** controllability and the stability of the equilibriums and local Hopf bifurcation of the system are verified. Some numerical simulations which show the effectiveness of the time-delayed feedback control method are provided.

关键词： Chemical system chaos stability Hopf bifurcation time delay

来源：评论

学校读者我要写书评

暂无评论

New Stability Criteria for High-Order Neural Networks with Proportional Delays

引用

Communications in Theoretical Physics 2017年第3期67卷 235-240页

作者：徐昌进李培峦 Guizhou Key Laboratory of Economics System Simulation Guizhou University of Finance and Economics School of Mathematics and Statistics Henan University of Science and Technology

This paper is concerned with high-order neural networks with proportional delays. The proportional delay is a time-varying unbounded delay which is different from the constant delay, bounded time-varying delay and distributed delay. By the nonlinear transformation yi(t) = ui( et)(i = 1, 2,..., n), we transform a class of high-order neural networks with proportional delays into a class of high-order neural networks with constant delays and timevarying coefficients. With the aid of Brouwer fixed point theorem and constructing the delay differential inequality, we obtain some delay-independent and delay-dependent sufficient conditions to ensure the existence, uniqueness and global exponential stability of equilibrium of the network. Two examples with their simulations are given to illustrate the theoretical findings. Our results are new and complement previously known results.

关键词： high-order neural networks exponential stability proportional delays delay differential inequality Brouwer fixed point theorem

来源：评论

学校读者我要写书评

暂无评论

Chaos Control and Bifurcation Behavior for a Sprott E system with Distributed Delay Feedback

引用

International Journal of Automation and computing 2015年第2期12卷 182-191页

In this paper, the problem of controlling chaos in a Sprott E system with distributed delay feedback is considered. By analyzing the associated characteristic transcendental equation, we focus on the local stability and Hopf bifurcation nature of the Sprott E system with distributed delay feedback. Some explicit formulae for determining the stability and the direction of the Hopf bifurcation periodic solutions are derived by using the normal form theory and center manifold theory. Numerical simulations for justifying the theoretical analysis are provided.

关键词： Sprott E system chaos control stability Hopf bifurcation distributed delay.

来源：评论

学校读者我要写书评

暂无评论

Long-term enhancing of Jupiter's electrostatic waves as diagnostic of Io's mass loading activity

引用

science Bulletin 2025年

作者： Long, Minyi Ni, Binbin Roussos, Elias Summers, Danny Blanc, Michel Xiao, Zhiyong Cao, Xing Yao, Zhonghua Zhang, Binzheng Ye, Shengyi Deng, Qingyun Feng, Enhao Lu, Peng Wang, Shaobei School of Earth and Space Science and Technology Wuhan University Wuhan430072 China Max Planck Institute for Solar System Research Göttingen37077 Germany CAS Center for Excellence in Comparative Planetology Hefei230026 China Department of Mathematics and Statistics Memorial University of Newfoundland St. John'sNLA1C 5S7 Canada Toulouse31062 France Toulouse13288 France Planetary Environmental and Astrobiological Research Laboratory School of Atmospheric Sciences Sun Yat-sen University Zhuhai519082 China Department of Earth Sciences The University of Hong Kong Hong Kong999077 China Department of Earth and Space Science Southern University of Science and Technology Shenzhen518055 China

来源：评论

学校读者我要写书评

暂无评论

Ontology-based heterogeneous data integration technology

Ontology-based heterogeneous data integration technology

引用

2013 International Conference on Vehicle and Mechanical Engineering and Information technology, VMEIT 2013

作者： Li, Kang Li, Xin Ming Liu, Dong Cui, Yun Fei Science and Technology on Complex Electronic System Simulation Laboratory China

ISBN: (纸本)9783037858202

For the vast amounts of heterogeneous data is difficult to effectively deal with the problem, propose an ontology-based data integration technology. Analysis of the types of semantic conflicts in data integration, ontology semantic description of traditional data integration framework for data integration middleware module. Ontology concept in the domain of information resources, and take the initiative to find and build semantic mapping between semantic conflicts. © (2013) Trans Tech Publications, Switzerland.

关键词： Data integration

来源：评论

学校读者我要写书评

暂无评论

A latency-hiding scheme for adjacent interaction simulation on multi-core/many-core clusters

A latency-hiding scheme for adjacent interaction simulation ...

引用

13th International Conference on systems simulation, AsiaSim 2013

作者： Chen, Li-Li Li, Wei Zhang, Jing Shi, Shuai Huang, Jian-Xin Science and Technology on Complex System Simulation Laboratory Beijing China

ISBN: (纸本)9783642450365

As the processor has entered the multi-core/many-core era, the parallel processing capability of a single processor can be improved in scale with increasing cores. However, for the high performance computation (HPC) clusters, the improvement of inter-node communication latency is far behind of the performance improvement of processors. As a result, communication latency often becomes the performance bottleneck of most HPC applications. This paper focuses on solving the communication latency problem of adjacent inter-action simulation on multi-core/many-core clusters, and pro-poses an optimized algorithm for adjacent interaction simula-tion on modern general purpose graphic many-core architec-tures and an O(B+2R) algorithm for inter-node latency- hiding. The theoretical analysis and experimental result show that the techniques proposed in this paper can effectively improve the performance of adjacent interaction simulation on multi-core/many-core clusters. © Springer-Verlag Berlin Heidelberg 2013.

关键词： Parallel processing systems

来源：评论

学校读者我要写书评

暂无评论

Generative AI-Enhanced Cooperative MEC of UAVs and Ground Stations for Unmanned Surface Vehicles

arXiv

引用

arXiv 2025年

作者： You, Jiahao Jia, Ziye Dong, Chao Wu, Qihui Han, Zhu The Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information Technology Nanjing University of Aeronautics and Astronautics Jiangsu Nanjing211106 China National Mobile Communications Research Laboratory Southeast University Jiangsu Nanjing211111 China Department of Electrical and Computer Engineering University of Houston HoustonTX77004 United States Department of Computer Science and Engineering Kyung Hee University Seoul446-701 Korea Republic of

The increasing deployment of unmanned surface vehicles (USVs) require computational support and coverage in applications such as maritime search and rescue. Unmanned aerial vehicles (UAVs) can offer low-cost, flexible aerial services, and ground stations (GSs) can provide powerful supports, which can cooperate to help the USVs in complex scenarios. However, the collaboration between UAVs and GSs for USVs faces challenges of task uncertainties, USVs trajectory uncertainties, heterogeneities, and limited computational resources. To address these issues, we propose a cooperative UAV and GS based robust multi-access edge computing framework to assist USVs in completing computational tasks. Specifically, we formulate the optimization problem of joint task offloading and UAV trajectory to minimize the total execution time, which is in the form of mixed integer nonlinear programming and NP-hard to tackle. Therefore, we propose the algorithm of generative artificial intelligence-enhanced heterogeneous agent proximal policy optimization (GAI-HAPPO). The proposed algorithm integrates GAI models to enhance the actor network ability to model complex environments and extract high-level features, thereby allowing the algorithm to predict uncertainties and adapt to dynamic conditions. Additionally, GAI stabilizes the critic network, addressing the instability of multi-agent reinforcement learning approaches. Finally, extensive simulations demonstrate that the proposed algorithm outperforms the existing benchmark methods, thus highlighting the potentials in tackling intricate, cross-domain issues in the considered scenarios. © 2025, CC BY.

关键词： Unmanned surface vehicles

来源：评论

学校读者我要写书评

暂无评论

Sub-Rayleigh limit imaging via intensity correlation measurements

引用

Chinese Physics B 2015年第4期24卷 211-214页

作者：姚旭日李龙珍刘雪峰俞文凯翟光杰 Key Laboratory of Electronics and Information Technology for Space System Center for Space Science and Applied ResearchChinese Academy of Sciences University of Chinese Academy of Sciences

We demonstrate sub-Rayleigh limit imaging of an object via intensity correlation measurements. The image com- pletely unaffected by the disturbance of diffraction-limit is achieved under the condition that the imaging system has an appropriate field of view. The resolution of this sub-Rayleigh limit imaging system is only tied to the lateral resolution of the illumination light.

关键词： image forming and processing speckle

来源：评论

学校读者我要写书评

暂无评论

Coalition Formation for Heterogeneous Federated Learning Enabled Channel Estimation in RIS-assisted Cell-free MIMO

arXiv

引用

arXiv 2025年

作者： Qi, Nan Liu, Haoxuan Tsiftsis, Theodoros A. Boulogeorgos, Alexandros-Apostolos A. Zhou, Fuhui Jin, Shi Wu, Qihui Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space Ministry of Industry and Information Technology Nanjing University of Aeronautics and Astronautics Nanjing210016 China Department of Informatics and Telecommunications University of Thessaly Lamia35100 Greece Department of Electrical and Computer Engineering University of Western Macedonia Kozani50100 Greece National Mobile Communications Research Laboratory Frontiers Science Center for Mobile Information Communication and Security Southeast University Nanjing210096 China

Downlink channel estimation remains a significant bottleneck in reconfigurable intelligent surface-assisted cell-free multiple-input multiple-output communication systems. Conventional approaches primarily rely on centralized deep learning methods to estimate the high-dimensional and complex cascaded channels. These methods require data aggregation from all users for centralized model training, leading to excessive communication overhead and significant data privacy concerns. Additionally, the large size of local learning models imposes heavy computational demands on end users, necessitating strong computational capabilities that most commercial devices lack. To address the aforementioned challenges, a coalition-formation-guided heterogeneous federated learning (FL) framework is proposed. This framework leverages coalition formation to guide the formation of heterogeneous FL user groups for efficient channel estimation. Specifically, by utilizing a distributed deep reinforcement learning (DRL) approach, each FL user intelligently and independently decides whether to join or leave a coalition, aiming at improving channel estimation accuracy, while reducing local model size and computational costs for end users. Moreover, to accelerate the DRL-FL convergence process and reduce computational burdens on end users, a transfer learning method is introduced. This method incorporates both received reference signal power and distance similarity metrics, by considering that nodes with similar distances to the base station and comparable received signal power have a strong likelihood of experiencing similar channel fading. Massive experiments performed that reveal that, compared with the benchmarks, the proposed framework significantly reduces the computational overhead of end users by 16%, improves data privacy, and improves channel estimation accuracy by 20%. © 2025, CC BY.

关键词： Federated learning

来源：评论

学校读者我要写书评

暂无评论

A Multi-Targets simulation Method Based on Single Channel

A Multi-Targets Simulation Method Based on Single Channel

引用

2023 International Conference on Electronic Information Engineering and Data Processing, EIEDP 2023

作者： Jing, Boda Jin, Congjun Song, Youbin Beijing Simulation Center Science and Technology on Special System Simulation Laboratory Beijing100854 China

ISBN: (纸本)9781510666160

The number of channels for radio frequency simulation system is very limited, and the traditional simulation method of one channel simulating one target is difficult to meet the demand of complex scene simulation. This paper proposes a simulation method based on the triadic vector control algorithm of "both amplitude and phase control" to simulate the angular position of multiple radar targets by one channel, and further researches the simulation method based on digital radio frequency memory technology to simulate the multidimensional characteristics of multiple radar targets such as delay, doppler frequency, amplitude and angle by one channel. Mathematical simulation experiments are designed to verify the feasibility of the method. © 2023 SPIE.

关键词： Radio waves

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：