检索结果-内蒙古大学图书馆

Policy iteration-based adaptive optimal control for Markov jump systems: a transition-probability-free asynchronous approach

引用

Science China(Information Sciences) 2024年第11期67卷 363-364页

作者： Weidi CHENG Chengcheng REN Shuping HE Changyin SUN Key Laboratory of Intelligent Computing and Signal Processing (Ministry of Education) School of Electrical Engineering and Automation Anhui University Anhui Engineering Laboratory of Human-Robot Integration System and Intelligent Equipment School of Electrical Engineering and Automation Anhui University Information Materials and Intelligent Sensing Laboratory of Anhui Province Engineering Research Center of Autonomous Unmanned System Technology (Ministry of Education) School of Artificial Intelligence Anhui University

The controller and filter design problems of Markov jump systems(MJSs) have gained significant attention over the past few decades. These studies include various aspects,including stochastic stabilization [1], optimal tracking control [2], and dissipative filter design [3]. Although numerous publications address the optimal controller design for MJSs, the issue of hidden MJSs, particularly those with mismatched jumping modes between the system and the controller, has rarely been explored.

关键词： Markov processes

来源：评论

学校读者我要写书评

暂无评论

New development in gas flow control for pneumatic systems

引用

Science China(Technological Sciences) 2025年第4期68卷 302-303页

作者： Yulong NIE Jiaqi CHANG Yixuan WANG Lei LI Yan SHI School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China Engineering Training Center Beihang UniversityBeijing 100191China Jingdezhen Research Institute of Beihang University Jingdezhen 333036China

Pneumatic technology,as one of the core basic industrial automation technologies,has been greatly developed because of its clean,high efficiency,low cost,and easy maintenance *** particular,gas flow control technology has been widely used in new energy vehicles,the petrochemical industry,and other *** typical pneumatic technical principles and electronic pressure/flow controllers are shown in Figure 1.

关键词： pneumatic technologyas electronic pressure flow controllers industrial automation flow control technology petrochemical industry new energy vehicles new energy vehiclesthe gas flow control

来源：评论

学校读者我要写书评

暂无评论

Representation strategy for unsupervised domain adaptation on person re-identification

引用

Optoelectronics Letters 2024年第12期20卷 749-756页

作者： LI Hao ZHANG Tao LI Shuang LI Xuan ZHAO Xin School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China College of Automotive Engineering Tianjin Vocational InstituteTianjin 300410China School of Electrical Engineering and Automation Tianjin University of TechnologyTianjin 300384China

The task of unsupervised person re-identification(Re-ID)is to transfer the knowledge learned in the source domain with no labels to the target domain with no *** to the significant differences in the background of different datasets,the trained model is challenging to extract person features accurately on unsupervised domain adaptive(UDA).Most UDA methods for person Re-ID use single-image representation(SIR)during the feature *** methods might ignore the difference among the cross-view images with the same *** this problem,the joint learning image representation strategy for unsupervised domain adaptation(JLIRS-UDA)is proposed,which takes cross-image representation(CIR)into account for *** network architecture of JLIRS-UDA consists of two networks with branching *** network consists of a shared network and two branching networks,the SIR branch and CIR *** two branching networks aim to learn the SIR and CIR,*** ensure the accuracy of the pseudo-label generation,the segmenting dynamic clustering(SDC)method is proposed,which divides the training process into two ***,in the first phases,SDC adopts the single image features in the clustering phase to ensure that accurate feature details can be *** the second phase,SDC fuses SIR and CIR as the final feature for clustering to interactively promote the SIR branch and CIR ***-UDA learns the SIR and CIR jointly in the UDA task training *** with the state-of-the-arts methods,the strategy proposed in this paper has achieved a significant improvement of 7.1%mean average precision(mAP)on the tasks of Market-1501(Market)to DukeMTMC-Re-ID(Duke).The slightest improvement in accuracy also achieved+0.8% on Market to MSMT17(MSMT).

关键词： networks branch branching

来源：评论

学校读者我要写书评

暂无评论

Research on Fault Diagnosis Algorithm of Air Compressor Based on Low-Rank Matrix Recovery

IAENG International Journal of Computer Science

引用

IAENG International Journal of Computer Science 2024年第12期51卷 2010-2016页

作者： Yu, Tianming Long, Cheng Feng, Guoliang School of Automation Engineering Northeast Electric Power University Jilin Jilin 132012 China School of Information and Control Engineering Jilin Institute of Chemical Technology Jilin Jilin 100190 China

Air compressors are crucial in industrial production, but issues such as equipment aging and improper operation can lead to faults, severely impacting efficiency and safety. Traditional MFCC spectrogram-based diagnostic methods are challenged by background noise interference, making accurate fault feature extraction difficult. To address this, this study proposes an air compressor fault identification algorithm based on low-rank matrix recovery. By applying low-rank background modeling to the MFCC spectrogram to eliminate background noise, the algorithm effectively extracts primary features. The MobileNetV2 model is then used to extract features from the MFCC foreground images, followed by dimensionality reduction using Principal Component Analysis (PCA). The reduced-dimensional fault features are analyzed using k-means clustering. Experimental results show that for Data 2, the VGG19 model achieved an accuracy of 95.90%, an F1-score of 0.91, and a recall of 0.93, with a processing time of 1916 seconds. In comparison, the ResNet50 model attained an accuracy of 94.88%, an F1-score of 0.91, and a recall of 0.93, with a processing time of 826 seconds. These results demonstrate that the foreground features obtained through low-rank background modeling exhibit superior performance in fault identification and clustering, enhancing the accuracy and stability of fault diagnosis. Thus, the proposed algorithm shows promising potential for diagnosing and repairing air compressor faults. © (2024), (International Association of Engineers). All rights reserved.

关键词： K-means clustering

来源：评论

学校读者我要写书评

暂无评论

Flexible dual-Janus porous membrane for underwater gas bubbles anti-buoyancy unidirectional transportation

引用

Science China Chemistry 2025年第3期68卷 881-890页

作者： Shuang Ben Han Ma Rui Liu Yuzhen Ning Zhihong Zhao Xudong Zhang Qiang Li Kesong Liu School of Materials Science and Engineering Shenyang Ligong UniversityShenyang 110159China Tianmushan Laboratory Hangzhou 310023China School of Equipment Engineering Shenyang Ligong UniversityShenyang 110159China Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology School of ChemistryBeihang UniversityBeijing 100191China School of Mechanical Engineering and Automation Beihang UniversityBeijing 100191China

Controllable transportation of bubbles in surfactant or aqueous is very important in daily chemical products,food fermentation,mineral flotation and other ***,bubbles are mainly dominated by buoyancy and move upward in solution,which makes the manipulation of bubbles *** some progress has been made in controlling underwater bubbles,achieving continuous transportation and collection of underwater bubbles without relying on external forces is still a great *** this end,we bionically designed a flexible polydimethylsiloxane(PDMS)porous surface with dual-Janus ***,a porous PDMS membrane integrating structural gradient and wettability gradient realizes the underwater anti-buoyancy unidirectional transportation of bubbles without external force input,and possesses the capability of underwater gas anti-buoyancy transportation and *** work provides inspiration and direction for the development and design of underwater gas transportation and storage devices and provides innovative thinking for the implementation of seabed carbon dioxide storage technology.

关键词： air diode anti-buoyancy unidirectional penetration without additional force dual-Janus membranes wettability gradient structural gradient

来源：评论

学校读者我要写书评

暂无评论

Cauchy DMP: Improving 3C industrial assembly quality with the Cauchy kernel and singular value decomposition

Cognitive Computation and Systems

引用

Cognitive Computation and Systems 2023年第4期5卷 288-299页

作者： Liu, Meng Zhu, Wenbo Luo, Lufeng Lu, Qinghua Yeh, Weichang Zhang, Yunzhi School of Mechatronic Engineering and Automation Foshan University Guangdong China Department of Industrial Engineering and Engineering Management National Tsing Hua University Taiwan

Although Dynamic Movement Primitives (DMP) is an effective tool for robotic arm trajectory generalisation, the application of DMP in the 3C (Computer, Communication, Consumer Electronics) industry still faces challenges such as low precision and high-time consumption. To address this problem, we propose a novel Cauchy DMP framework. The main improvements and advantages of Cauchy DMP, compared to the original DMP, are (1) since the Cauchy distribution has a simpler model and wider shape, using the Cauchy distribution instead of the Gaussian distribution in the original DMP reduces the complexity of the algorithm and saves time. (2) Singular Value Decomposition (SVD) can effectively model the error. To reduce the interference of the rounding and human error on the trajectory, SVD can be used to obtain the weight of each basis function. The proposed Cauchy DMP framework combines the above two points and is validated on a real UR5 robotic arm. The results show that Cauchy DMP retains the learnability of the original DMP and has the advantages of short time consumption and low error rate. © 2023 The Authors. Cognitive Computation and Systems published by John Wiley & Sons Ltd on behalf of The Institution of engineering and Technology and Shenzhen University.

关键词： Singular value decomposition

来源：评论

学校读者我要写书评

暂无评论

FSIW Cavity-Based Self-Packaging Filtering Slot Antennas with Wide-Stopband and High Frequency Selectivity

引用

IEEE Transactions on Antennas and Propagation 2025年第6期73卷 3503-3516页

作者： Zhou, Xin Zhang, Gang Tam, Kam-Weng Pang, Ziyu Zhang, Zhuowei Lin, Huawei Hong, Jiasheng University of Macau Faculty of Science and Technology Department of Electrical and Computer Engineering China Nanjing Normal University School of Electrical and Automation Engineering Nanjing210046 China Nanjing Normal University Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing School of Electrical and Automation Engineering Nanjing210046 China Heriot-Watt University School of Engineering and Physical Sciences Department of Electrical Electronic and Computer Engineering EdinburghEH14 4AS United Kingdom

This article proposes a novel design approach for miniaturized, highly selective, self-packaged, and wide-stopband filtering slot antennas based on C- and T-type folded substrate integrated waveguide (C-/T-FSIW) cavities. Firstly, two forms of FSIW cavity are explored and analyzed. A new coupled C-type half-mode FSIW (C-HMFSIW) cavities are developed. A filtering antenna is proposed, employing a C-HMFSIW cavity for feeding and a slot-loaded C-FSIW cavity for radiation. By introducing cross-coupling between different resonators, a radiation null (RN) is achieved. To further enhance bandwidth and frequency selectivity, a new antenna configuration is developed using a C-HMFSIW cavity for feeding and a slot-loaded T-FSIW cavity for radiation. After loading the radiation slot, the T-FSIW cavity serves as two parts: one as the main radiator and the other as a parasitic radiator opposite to it. This configuration increases antenna bandwidth and generates an additional RN. Interestingly, adjusting the position of the radiation slot allows the RN to switch between the upper and lower stopbands. The antennas proposed in this work exhibit good stopband performance and compact size. Three filtering antenna prototypes are designed, fabricated, and measured, showing consistent results between measurements and simulations. © 1963-2012 IEEE.

关键词： Radiators

来源：评论

学校读者我要写书评

暂无评论

Safety-Critical Parallel Trajectory Tracking Control of Maritime Autonomous Surface Ships Based on Integral Control Barrier Functions

IEEE Transactions on Intelligent Vehicles

引用

IEEE Transactions on Intelligent Vehicles 2024年第5期9卷 1-10页

作者： Xu, Jiaxue Gu, Nan Wang, Dan Li, Tieshan Han, Bing Peng, Zhouhua School of Marine Electrical Engineering Dalian Maritime University Dalian China School of Automation Engineering University of Electronic Science and Technology of China Chengdu China College of Physics and Electronic Information Engineering Minjiang University Fujian China

This article investigates the parallel trajectory tracking control of fully-actuated maritime autonomous surface ships (MASSs) in the presence of multiple stationary/moving ocean obstacles. A safety-critical parallel control architecture is proposed for the trajectory tracking control of MASSs. Specifically, an artificial MASS system is constructed based on a data-driven learning predictor where real-time and historical navigation data are both utilized to achieve the estimation of the unknown weights of Taylor polynomials and Fourier series. Then, a parallel trajectory tracking control law is designed based on the artificial system such that the MASS is capable of track the reference trajectory positively. Finally, integral control barrier functions are employed to encode input and safety constraints. A safety optimization signal is augmented to the designed parallel control law to achieve the collision avoidance of all ocean obstacles. Based on the stability and safety analyses, the tracking errors of the actual MASS system are verified to be uniformly ultimately bounded and the MASS system is safe. Numerical examples confirm the effectiveness of the designed safety-critical parallel trajectory tracking control scheme for the MASS. IEEE

关键词： Trajectories

来源：评论

学校读者我要写书评

暂无评论

Model-Based Online Adaptive Inverse Noncooperative Linear-Quadratic Differential Games via Finite-Time Concurrent Learning

IEEE Transactions on Artificial Intelligence

引用

IEEE Transactions on Artificial Intelligence 2024年第8期5卷 4247-4257页

作者： Lin, Jie Wu, Huai-Ning Beihang University School of Automation Science and Electrical Engineering Beijing100191 China Beihang University Science and Technology on Aircraft Control Laboratory School of Automation Science and Electrical Engineering Beijing100191 China Peng Cheng Laboratory Shenzhen518066 China

Noncooperative differential games provide a basis for the study of coordination, conflict, and control for a single dynamical system with multiple players. Within the linear-quadratic differential games (LQDGs), the optimal feedback gain matrix and the weighting matrices of individual cost function depict each player's control policy and the tradeoff of various objectives, respectively. In this article, we investigate the inverse problem of LQDG with partial state observation via a model-based online method, i.e., recover the cost function of each player. First, a state observer is used to estimate the system state. Then, the feedback gain matrices of players are learned using a finite-time concurrent learning (FTCL)-based adaptive law relaxing the persistent excitation (PE) condition which is required in traditional adaptive estimation methods. With the learned feedback gain matrices, a semidefinite programming (SDP) problem with the quadratic objective function can be set up for determining the weighting matrices of the cost function. The applicability and effectiveness of the proposed method are demonstrated with a numerical example and a shared steering control simulation. © 2020 IEEE.

关键词： Cost functions

来源：评论

学校读者我要写书评

暂无评论

Safety requirement verification of train-centric CBTC by integrating STPA with coloured Petri net

引用

International Journal of Industrial and Systems engineering 2023年第2期43卷 168-189页

作者： Xu, Qian Lin, Jun-Ting School of Automation and Electrical Engineering Lanzhou Jiaotong Universiy Lanzhou730070 China

Train-centric communication-based train control (TcCBTC) system is characterised by core functions centralised into on-board facilities with simplified trackside equipment. Coloured Petri net (CPN) is one of the classical model checking methods and system-theoretic process analysis (STPA) is a relatively new hazard identification method based on system thinking and control theory. STPA and CPN are mutually complementary because STPA provides the verification basis for CPN while CPN makes STPA’s results written by natural language verifiable. The functional requirements of TcCBTC are analysed first. Secondly, via the assistant analysis tool XSTAMPP 2.0, the hierarchical control structure is built and the refined unsafe control actions are obtained to generate the safety requirements. Thirdly, CPN models are constructed for verifying the basic properties and the safety. Results show that the potential unsafe control paths can be identified by the proposed method on the system level and the dependence severity on the manual analysis is considerably reduced. Copyright © 2023 Inderscience Enterprises Ltd.

关键词： Model checking

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：