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13th International Symposium on Linear Drives for Industry Applications, LDIA 2021

作者： Liu, Yingquan Lu, Junyong Long, Xinlin National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9781728172101

Missile steering gear is the executive mechanism of missile control system, its performance directly affects the precision of missile guidance and control. An air-cored U-type permanent magnet linear motor is designed in this paper to simplify the structure of the missile steering system, reduce the connection cables and improve the reliability. The motor employs double side cambered PMs as excitation, and the air-cored coils directly drives the rudder blade. By canceling the reduction gear, the transmission efficiency of the steering system is enhanced. Moreover, the air-cored actuator can improve the response performance due to its light weight. The analytical thrust is derived in this paper. The design structure is optimized by finite element simulation. The transient calculation shows that the designed direct-driven actuator can achieve the expected thrust theoretically. © 2021 IEEE

关键词： Linear motors

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Confinement-Regulated Lamellar Interphase with Enhanced Dielectric Environments for Lithium Metal Batteries

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ACS nano 2025年第22期19卷 2025 May 30页

作者： Ruixin Lv Chong Luo Ke Wang Wangming Tang Bingran Liu Yi Liu Yang Li Li Li Feng Wu Renjie Chen Beijing Key Laboratory of Environmental Science and Engineering School of Material Science and Engineering Beijing Institute of Technology Beijing 100081 China. Shandong Key Laboratory of Advanced Chemical Energy Storage and Intelligent Safety Advanced Technology Research Institute Beijing Institute of Technology Jinan 250300 China. Innovative Research Team in High-Safety Energy Storage System and Smart Microgrids of Guangdong Province Beijing Institute of Technology (Zhuhai) Zhuhai 519088 China. National Key Laboratory of Science and Technology on Power Sources Tianjin Institute of Power Sources Tianjin 300384 China. Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081 China.

The natural solid electrolyte interphase (SEI) typically consists of complex ingredients and disordered structures, posing significant challenges in achieving rapid Li desolvation and uniform Li deposition, which leads to uncontrolled electrolyte decomposition and lithium dendrite growth. This study designs a lamellar sieving interphase with enhanced dielectric environments, achieved through confinement-regulated polymer chain conformation, effectively decoupling the Li desolvation and deposition processes. The lamellar interphase selectively sieves solvent molecules, promoting Li desolvation and enhancing the dissociation of lithium salts. The nanofluidic channel within the confined lamella promotes ion transfer, ensuring uniform ion distribution and improving mechanical stability. Lithium metal anodes with this lamellar interphase exhibit exceptional stability during stripping/plating cycling, maintaining stable performance for over 2000 h at 2 mA cm. Furthermore, LiFePO||Li and NCM811||Li batteries assembled with the lamellar interphase demonstrate a stable reversible capacity and cycling performance. This study presents a lamellar interphase design, offering tunable confinement and regulation mechanisms to decouple the Li desolvation and deposition processes with stable cycling performance in lithium metal batteries.

关键词： Confinement Dielectric environment Lamellar interphase Li+ deposition Lithium metal batteries

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A Reinforcement Learning PID Compound Protocol design Method for Ultrasonic Motor Control*

A Reinforcement Learning PID Compound Protocol Design Method...

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Control Conference (ANZCC), Australian and New Zealand

作者： Qiang Wang Yunlong Yang Xiongjun Wu Jinqi Wang Guanyu Liu The 802 Institute of Shanghai Academy of Space Flight Technology The Eighth Academy of China Aerospace Science and Technology Corporation National Defense Key Laboratory of Science and Technology on Electromagnetic Scattering Shanghai Department of Automation Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai Jiao Tong University Shanghai China

Aiming at overcoming drawback brought by the nonlinear and time-varying characteristics of ultrasonic motor, this paper proposed a PID compound controller of ultrasonic motor based on reinforcement learning to improve the dynamic performance and adaptability of the system. In practice, the output control value of the reinforcement learning controller is observed in general to be uncertain, and sometimes even destroys the learning strategy, which makes the system unstable. To overcome this limitation, this paper ultilized the idea of expert rules to improve the controller performance, and the Lyapunov stability is also guaranteed. The simulation results show that the improved composite control algorithm can significantly improve the learning efficiency, and meanwhile shorten the number of learning iterations. At the same time, the composite controller based on expert rules significantly improves the control performance of the system, in terms of reducing the rise time and adjustment time of the system, as well as reducing the steady-state error of the system.

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The Parables of the Mustard Seed and the Yeast: Extremely Low-Budget, High-Performance Nighttime Semantic Segmentation 39

The Parables of the Mustard Seed and the Yeast: Extremely Lo...

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39th Annual AAAI Conference on Artificial Intelligence, AAAI 2025

作者： Wang, Shiqin Xu, Xin Chen, Haoyang Jiang, Kui Wang, Zheng School of Computer Science and Technology Wuhan University of Science and Technology Wuhan 430065 China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System China National Engineering Research Center for Multimedia Software School of Computer Science Wuhan University China School of Computer Science and Technology Harbin Institute of Technology Harbin 150001 China

ISBN: (纸本)157735897X

Nighttime Semantic Segmentation (NSS) is essential to many cutting-edge vision applications. However, existing technologies overly rely on massive labeled data, whose annotation is time-consuming and laborious. In this paper, we pioneer a new task focusing on exploring the potential of training strategy and framework design with limited annotation to achieve high-performance NSS. Insufficient information at very low labeling budgets can easily lead to under-optimization or overfitting of the model. Our solution comprises two main components: i) a novel region-based active sampling strategy called Contextual-Aware Region Query (CARQ), which identifies highly informative target nighttime regions for labeling;and ii) an innovative Fragmentation Synergy Active Domain Adaptation framework (FS-ADA), which progressively broadcasts the limited annotation to the unlabeled regions, achieving high performance with a minimal annotation budget. Extensive experiments demonstrate that our method outperforms state-of-the-art UDA-NSS & ADA-SS methods across four day-to-nighttime benchmarks, and generalizes well to foggy, rainy, & snowy scenes. In particular only with 1% target nighttime data annotation, our method is on par with the mainstream fully-supervised methods on the BDD100K-Night val dataset. Copyright © 2025, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

关键词： Budget control

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Research on Characteristics Analysis and Suppression Method of Short Circuit Fault of Coaxial Cable in Electromagnetic Launch 4

Research on Characteristics Analysis and Suppression Method ...

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4th IEEE china International Electrical and Energy Conference, CIEEC 2021

作者： Cui, Junwei Zhang, Xiao Lu, Junyong Dai, Yufeng National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9781728171494

In electromagnetic launch systems, coaxial cables are used for energy transmission from the power supply to the launcher. Once the cable has a short-circuit fault, it will cause the cable to over-current or even explode, causing the launch to fail. This paper first established the dynamic launch model of the capacitive energy storage electromagnetic launch system, and analyzed in detail the influence of the coaxial cable short-circuit fault location on the load current, projectile exit speed, and coaxial cable current. The results show that the closer the short-circuit fault location is to the load side, The larger the cable fault current, the smaller the projectile exit *** 1m the cable fault current reached 1.9 times the normal current, resulting in a 76% drop in exit ***,an electromagnetic launch system model with a high-temperature superconducting current limiter was established,and the installation position of the current limiter was optimized. The fault current before and after the installation of the current limiter was simulated and compared. The results showed that: after the current limiter was added, the cable short-circuit current The peak value dropped by 29%, and the projectile exit speed was reduced by 61 % compared to normal conditions, which can effectively reduce the impact of short-circuit current on the cable, increase the projectile exit speed, and provide guidance for the safety design of the electromagnetic launch system. © 2021 IEEE.

关键词： Projectiles

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Research on design Method of External Coil of Electromagnetic Rail Launch Equivalent Test Platform 4

Research on Design Method of External Coil of Electromagneti...

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4th IEEE china International Electrical and Energy Conference, CIEEC 2021

作者： Du, Wentong Long, Xinlin Cheng, Long Lu, Junyong Li, Songcheng Liu, Yingquan Naval University of Engineering National Key Laboratory of Science and Technology on Vessel Integrated Power System Wuhan China

ISBN: (纸本)9781728171494

It is difficult to study the interaction mechanism between electromagnetic energy and metal materials directly in the electromagnetic rail launcher. Based on the existing test conditions, under the condition of tens of kiloamperes of current, the loading mode of long pulse current combined with external magnetic field is adopted, which is equivalent to the extreme environment of electromagnetic thermodynamic synthesis in the process of electromagnetic rail launching. In this paper, through theoretical calculation and ANSYS simulation, the magnetic field distribution of circular, rectangular, elliptic and straight slot coils are compared, and the influence of elliptic parameters on the magnetic field is emphatically analyzed. The ratio of long axis to short axis of ellipse when the magnetic field distribution is relatively uniform is obtained by simulated annealing algorithm. The conclusion shows that when the external coil is elliptic and the ratio of long axis to short axis is about 1.6, the magnetic field, current density and electromagnetic force on the metal sample can be equivalent to the electromagnetic rail launch condition. © 2021 IEEE.

关键词： Simulated annealing

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A coevolutionary framework of business-IT alignment via the lens of enterprise architecture

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Journal of systems Engineering and Electronics 2020年第5期31卷 983-995页

作者： LIN Menglong YI Shuanghui ZHANG Mengmeng CHEN Tao CHEN Honghui ZHANG Xiaoxue Science and Technology on Information Systems Engineering Laboratory National University of Defense TechnologyChangsha 410072China National Key Laboratory for Complex System Simulation Academy of Military SciencesBeijing 100000China

Due to the turbulent external business environment, the complexity of internal relations of the organization and the emergence of subversive IT roles, the business-IT alignment(BITA)has become increasingly difficult. The unsuccessful realization of BITA will lead to the waste of organizational resources, the reduction of return on investment and eventually the loss of competitive advantage. In recent years, coevolution has received widespread attention due to its ability to describe the dynamic relationship between IT and business. Multiple principles such as quickening learning action loops and adopt suitable organizing principles for achieving business and IT coevolution(BITC) are obtained. However, the continuous BITC is still hard to be achieved because of the lack of complete BITC management. This paper focuses on the management process of the BITC and how to perform it gradually. A coevolution framework combines the enterprise architecture(EA) approach with the coevolution analysis is proposed, which contains the design of EA, the sensing and governance of the misalignment and the procedure of the EA misalignment *** steps for the governance and prevention of misalignment are discussed in particular. Through comparison with the principles,characteristics and methods of coevolution in the literature, the proposed framework is evaluated. The results show that the proposed framework is effective for BITC implementation.

关键词： business-IT alignment(BITA) coevolution misalignment governance misalignment prevention enterprise architecture

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Dual-Target Point Cloud Registration for Partially Visible Data Using Local and Global Features

SSRN

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SSRN 2024年

作者： Rao, Zhifeng Chen, Yuang Cao, Ming Lin, Zhiyun School of System Design and Intelligent Manufacturing Southern University of Science and Technology Shenzhen518055 China Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology Shenzhen518055 China University of Groningen Netherlands Peng Cheng Laboratory Shenzhen518055 China

Point cloud registration is a challenging task when only partially visible data is available. Recently, many learning-based methods have been proposed for this problem and have achieved satisfactory performance. However, they use only one source point cloud and fail to pay attention to the key factor of registration: alignment of attitudes. Based on this phenomenon, we propose a dualtarget point cloud registration model: An end-to-end model, which uses multiple source point clouds and for each source point cloud, a new created target point cloud is added to pay more attention to the alignment of attitudes. Our model is divided into two components: coarse and fine registrations. First, an initialization module is introduced for coarse registration, in which multiple source point clouds are used and for each source point cloud, a new target point cloud specifically for aligning the attitudes is added. Second, we design a two-step Attention-based Representative Overlapping-Point Selection module to select representative overlapping points for fine registration, which uses both global and local features of the point clouds. In the first step, overlapping scores are predicted using global features. In the second step, a feature-matching matrix is obtained based on local features. Representative overlapping points are selected based on the overlapping scores and the feature-matching matrix. Using these points, a weighted SVD algorithm is used to estimate the transformation of fine registration. Extensive experiments on ModelNet40, 7Scenes and ICL-NUIM show that our method achieves the state-of-the-art compared to other learning-based methods. © 2024, The Authors. All rights reserved.

关键词： Matrix algebra

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Investigation on the 36MVA PP-IGBT-Based Power Converter for High-Speed Maglev Applications 13

Investigation on the 36MVA PP-IGBT-Based Power Converter for...

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13th International Symposium on Linear Drives for Industry Applications, LDIA 2021

作者： Zhou, Liang Deng, Chen Li, Weichao Yan, Ming Han, Jinyang Zhong, Ying National Key Laboratory of Science and Technology on Vessel Integrated Power System Naval University of Engineering Wuhan China

ISBN: (纸本)9781728172101

Press-pack insulated gate bipolar transistors (PP-IGBTs) are a more attractive choice for high-power converters, due to increased current ratings, and an inherent short-circuit failure mode. This paper shows how a power electronics building block (PEBB) based on PP-IGBTs has been carefully designed and assembled to build a 36MVA power converter for high-speed maglev applications. The minimization of the stay inductance, the equalization of power loss and snubberless operation are within the main technical design requisites. Simulation and experiment results show that the developed PEBB based on PP-IGBTs is proved to be suitable for the 36MVA power converter. © 2021 IEEE

关键词： Power converters

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Energy-aware Trajectory Optimization for UAV-enabled wireless powered WSN

Energy-aware Trajectory Optimization for UAV-enabled wireles...

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Fully Actuated system Theory and Applications (CFASTA), Conference on

作者： Feihang Qiu Jing Guo Huineng Diao Xu Zhang School of Mechatronic Engineering and Automation Foshan University Foshan China School of System Design and Intelligent Manufacturing Southern University of Science and Technology Shenzhen China Shenzhen Key Laboratory of Control Theory and Intelligent Systems Southern University of Science and Technology Shenzhen China

ISBN: (数字)9798350373691

ISBN: (纸本)9798350373707

Unmanned Aerial Vehicle enabled (UAV-enabled) wireless powered Wireless Sensor Networks (WSN) provide an effective way to deploy massive and passive sensors for environmental monitoring in harsh environments. This study focuses on maximizing the total energy received by all Sensor Nodes (SNs) through the optimization of the UAV trajectory. An energy-aware smoothing trajectory method is proposed by considering the dynamic energy requirements of SNs. First, the optimization problem (P1) is formulated according to the mathematical model. Second, the B-spline method is introduced to turn the smoothing problem into a solvable problem (P2). Finally, problem (P2) is solved under the constraints to obtain the trajectory solution. Simulation results indicate the proposed method can adjust the overall trajectory according to the SNs demands. Meanwhile, according to the wake-up distance and energy-aware, the trajectory of some nodes can be locally adjusted without affecting other trajectory segments.

关键词： Wireless communication Wireless sensor networks Smoothing methods Simulation Autonomous aerial vehicles Mathematical models Trajectory

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