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arXiv 2023年

作者： Su, Yukun Sun, ruizhou Shu, Xin Zhang, Yu Wu, Qingyao The School of Software Engineering South China University of Technology Guangzhou510640 China The School of Computer Science and Engineering Nanyang Technological University Singapore The Santachi Technology Co. Ltd. R&D Department Guangdong Shenzhen518109 China

Multi-Object Tracking (MOT) is a crucial computer vision task that aims to predict the bounding boxes and identities of objects simultaneously. While state-of-the-art methods have made remarkable progress by jointly optimizing the multi-task problems of detection and re-Id feature learning, yet, few approaches explore to tackle the occlusion issue, which is a long-standing challenge in the MOT field. Generally, occluded objects may hinder the detector to estimate the bounding boxes, resulting in the fragmented trajectories. And the learned occluded re-Id embeddings are less distinct since they contain interferer. To this end, we propose an occlusion-aware detection and re-Id calibrated network for multi-object tracking, termed as OrCTrack. Specifically, we propose an Occlusion-Aware Attention (OAA) module in the detector that highlights the object features while suppressing the occluded background regions. OAA can serve as a modulator that enhances the detector for some potentially occluded objects. Furthermore, we design a re-Id embedding matching block based on the optimal transport problem, which focuses on enhancing and calibrating the re-Id representations through different adjacent frames complementarily. To validate the effectiveness of the proposed method, extensive experiments are conducted on two challenging Visdrone2021-MOT and KITTI benchmarks. Experimental evaluations demonstrate the superiority of our approach, which can achieve the new state-of-the-art performance and enjoy high run-time efficiency. copyright © 2023, The Authors. All rights reserved.

关键词： Embeddings

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Wireless,Multifunctional System-Integrated Programmable Soft robot

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纳微快报（英文版） 2025年第7期17卷 12-25页

作者： Sungkeun Han Jeong-Woong Shin Joong Hoon Lee Bowen Li Gwan-Jin Ko Tae-Min Jang Ankan dutta Won Bae Han Seung Min Yang dong-Je Kim Heeseok Kang Jun Hyeon Lim Chan-Hwi Eom So Jeong Choi Huanyu Cheng Suk-Won Hwang KU-KIST Graduate School of Converging Science and Technology Korea University145 Anam-RoSeongbuk-GuSeoul 02841Republic of Korea KU-KIST Graduate School of Converging Science and Technology Korea University145 Anam-RoSeongbuk-GuSeoul 02841Republic of Korea Semiconductor R&D Center Samsung Electronics Co.Ltd.Hwaseong-SiGyeonggi-Do 18448Republic of Korea KU-KIST Graduate School of Converging Science and Technology Korea University145 Anam-RoSeongbuk-GuSeoul 02841Republic of Korea SK Hynix Icheon 17336Republic of Korea Department of Engineering Science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Engineering Science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802USA Center for Neural Engineering The Pennsylvania State UniversityState CollegeUniversity ParkPA 16802USA Department of Mechanical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA KU-KIST Graduate School of Converging Science and Technology Korea University145 Anam-RoSeongbuk-GuSeoul 02841Republic of Korea Hanwha Systems Co. Ltd.188Pangyoyeok-RoBundang-GuGyeonggi-DoSeongnam-Si 13524Republic of Korea Department of Engineering Science and Mechanics The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Materials Science and Engineering The Pennsylvania State UniversityState CollegeUniversity ParkPA 16802USA Materials Research Institute The Pennsylvania State UniversityState CollegeUniversity ParkPA 16802USA KU-KIST Graduate School of Converging Science and Technology Korea University145 Anam-RoSeongbuk-GuSeoul 02841Republic of Korea Center for Biomaterials Biomedical Research InstituteKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Integrative Energy Engineering Korea UniversitySeoul 02841Republic of Korea

Soft robots have partially or entirely provided versatile opportunities for issues or roles that cannot be addressed by conventional machine robots,although most studies are limited to designs,controls,or physical/mechanical ***,we present a transformable,reconfigurable robotic platform created by the integration of magnetically responsive soft composite matrices with deformable multifunctional *** compounds engineered to undergo phase transition at a low tem-perature can readily achieve reversible magnetization and conduct various changes of motions and *** and flexible electronic system designed with mechanical dynamics does not interfere with movements of the soft electronic robot,and the performances of wireless circuit,sensors,and devices are independent of a variety of activities,all of which are verified by theoretical *** of navigations and electronic operations in an artificial track highlights the potential of the integrated soft robot for on-demand,environments-responsive movements/metamorphoses,and optoelectrical detection and *** improvements to a miniaturized,sophisticated system with material options enable in situ monitoring and treatment in envisioned areas such as biomedical implants.

关键词： Untethered multimodallocomotion Soft robotics Soft electronics Wireless reprogrammable magnetic soft robot

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deep hole connector design and oil film pressure study 64

Deep hole connector design and oil film pressure study

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64th International conference on Vibroengineering

作者： Chen, Zhenya Ma, Zhuoqiang Li, Xiang Miao, Hongbing Yang, Shangjin Li, Jian School of Mechanical Engineering North University of China Taiyuan030051 China 713 Research Institute of China Shipbuilding Industry Corporation Zhengzhou450015 China Shanxi Provincial Key Laboratory of Intelligent Equipment Technology in Harsh Environment Taiyuan030051 China Inner Mongolia North Heavy Industry Group Co. Ltd. Nanjing R&D Center Nanjing211100 China

Aiming at the problem of insufficient rigidity of the tool system and unbalanced radial force during deep hole machining, this paper designs a deep hole connector using the fluid dynamic pressure lubrication principle. The deep hole connector includes double-bridge strain gauges and tiltable tiles, which can increase the rigidity of the tool system by using the oil film support stiffness and offset the unbalanced radial force of synchronous detection by adjusting the oil film pressure in real time. First, the mathematical model of tiltable tile is established, the oil film thickness formula is derived, and the formula of oil film pressure is derived. Then, based on Fluent software, the fluid simulation of the deep hole connector is carried out. The simulation adopts a single-factor experiment method, and the change law of oil film pressure on tiltable tile is analyzed under different conditions, respectively. The results show that during deep hole machining, the oil film pressure can be adjusted by adjusting the parameters of workpiece speed, cutting fluid viscosity, tile tilt angle, and tile wrap angle, and then achieve the purpose of increasing the rigidity of the tool system and offsetting the unbalanced radial force. © 2023 JVE International. All rights reserved.

关键词： Lubrication

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Optimization design method of optical encoders based on cascaded half-integer MMIs 29

Optimization design method of optical encoders based on casc...

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29th Opto-Electronics and communications conference, OECC 2024

作者： Zhong, Meilin Chen, Yu Cao, Wei Liu, Shenghao Sun, Xu Liu, Gordon Ning Soochow University School of Electronic and Information Engineering Suzhou215006 China CreaLights Technology Co. Ltd. Silicon Photonics R&d Center Suzhou215124 China Soochow University Jiangsu New Optical Fiber Technology and Communication Network Engineering Research Center School of Electronic and Information Engineering Suzhou215006 China

ISBN: (纸本)9798350308396

An automated method is proposed to optimize a compact optical encoder based on half-integer multimode interferometers (MMIs). We employ the improved particle swarm optimization (PSO) algorithm to reconfigure the phase shifters. Good convergence and robustness are demonstrated by applying the method into the switch of encoding states under fabrication errors. © 2024 IEEE.

关键词： Particle swarm optimization (PSO)

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research on signalized intersection mixed traffic flow platoon control method considering Backward-looking effect

arXiv

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arXiv 2024年

作者： Feng, Binghao Guo, Hui Ma, Minghui Wu, Yuepeng Liang, Shidong Wang, Yansong School of Mechanical and Automotive Engineering Shanghai University of Engineering Science Shanghai201620 China Shanghai Intelligent and Connected Vehicle R&D Center Co. Ltd. Shanghai201499 China Business School University of Shanghai for Science and Technology Shanghai200093 China

connected and Autonomous Vehicles (CAVs) technology facilitates the advancement of intelligent transportation. However, intelligent control techniques for mixed traffic flow at signalized intersections involving both CAVs and Human-driven Vehicles (HdVs) require further investigation into the impact of backward-looking effect. This paper proposes the concept of "1+n+1" mixed platoon considering the backward-looking effect, consisting of one leading CAV, n following HdVs, and one trailing CAV. The leading and trailing CAVs collectively guide the movement of intermediate HdVs at intersections, forming an optimal control framework for platoon-based CAVs at signalized intersections. Initially, a linearized dynamic model for the "1+n+1" mixed platoon is established and compared with a benchmark model focusing solely on controlling the lead vehicle. Subsequently, constraints are formulated for the optimal control framework, aiming to enhance overall intersection traffic efficiency and fuel economy by directly controlling the leading and trailing CAVs in the platoon. Finally, extensive numerical simulations compare vehicle throughput and fuel consumption at signalized intersections under different mixed platoon control methods, validating that considering both front and backward-looking effects in the mixed platoon control method outperforms traditional methods focusing solely on the lead CAV. copyright © 2024, The Authors. All rights reserved.

关键词： Autonomous vehicles

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Multi-Scale dense Networks for Ship Classification Using dual-Polarization SAr Images

Multi-Scale Dense Networks for Ship Classification Using Dua...

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IEEE National conference on radar

作者： Jinglu He Wenlong Chang Fuping Wang Ying Liu Chenglu Sun Yinghua Li School of Communications and Information Engineering Xi'an University of Posts and Telecommunications Xi'an China Dept. of Integrated Circuit R&D Xi'an Xiangteng Microelectronics Technology Co. LTD Xi'an China

As one of crucial remote sensing applications, ship classification using synthetic aperture radar (SAr) images has increasingly been studied in modern maritime surveillance. Nowadays, the prevailing classification paradigm for SAr ship targets is to utilize the deep network models, which presents superior performance over the traditional handcrafted feature driven methods. Of which the SAr ship classification method using densely connected convolutional neural networks (CNNs) is among the state-of-the-art. However, the general CNNs cannot fully explore the SAr ship feature representations, which limits its potentials for better classification performance. In this paper, we propose a novel multi-scale framework for the CNNs to further improve the ship classification performance with dual-polarization SAr images. Particularly, the convolutional feature maps from different spatial scales are fused to acquire multi-scale global representations of the dual-polarization SAr images, which are finally integrated by the group bilinear pooling operation in the classification layer and will further be processed by multiple classifiers for better network training. Extensive experiments have proved that the proposed method can improve the robustness and classification performance against the state-of-the-art algorithms on the OpenSArShip datasets.

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Numerical study on stress wave and viscosity dominated dynamic fracture in granular material 27

Numerical study on stress wave and viscosity dominated dynam...

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27th International congress on Sound and Vibration, ICSV 2021

作者： dong, Jingnan Wang, Xiangyang Zhao, Zhigang Zhu, Feifei Liu, Yifan Qiao, Lei CNPC Engineering Technology R&D Company Limited Beijing102206 China China National Petroleum Corporation Jilin Oilfield Songyuan Gas Production Plant China Equipment Monitoring Center Zhongyuan Oil Field Branch Sinopec Sinopec Star Henan New Energy Development Co. Ltd

ISBN: (纸本)9788378807995

Wave propagation plays an important role in the propagation of dynamic fracture. Inertia force, rate-dependent behaviour, and stress waves are three primary features present in the dynamic fracture. In this studied, the viscosity behaviour and reflected stress waves in the dynamic crack of granular material are investigated using particle flow code. A series of dynamic fracture simulations are performed based on a double cantilever beam configuration. Energy transition, crack growth length, and crack velocity during the dynamic crack propagation are investigated. results show that under certain circumstances, the crack propagates in a jumping manner in dCB specimen as the reflected stress waves reinitiate and accelerate the crack several times. However, the reflected stress waves only trigger the re-initiation. Most of the driving force comes from the bond break of the contacts. The viscosity damping force significantly reduces the crack velocity. The maximum crack velocity in the viscosity-free system is as high as 0.96 times the rayleigh wave speed. Whereas under the same normalized initial input energy, the maximum crack velocity in the critically damped system is only half the maximum crack velocity in the viscosity-free system. Most of the viscosity energy is dissipated in the vicinity of the running crack. The stress wave propagation in the relatively far field only dissipates a very small amount of the total energy compared to the energy dissipated in the vicinity of the crack during propagation. The surface energy has a positive correlation with the crack velocity, which is significantly reduced by viscosity damping force. The simulation provides a better understanding of the stress wave and viscosity dominated dynamic crack propagation of granular material. © "Advances in Acoustics, Noise and Vibration - 2021" Proceedings of the 27th International congress on Sound and Vibration, ICSV 2021. All rights reserved.

关键词： Viscosity

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Electric field relaxation by FGM on permittivity to three-core type GIS spacer

Electric field relaxation by FGM on permittivity to three-co...

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23rd International Symposium on High Voltage engineering (ISH 2023)

作者： Katsumi Kato Soya Bito ryuto Nomura Hidetaka Masui Kenji Okamoto Department of Electrical Engineering and Information Science NIT Niihama College Niihama Japan Advanced Technology Laboratory Corporate R&D Headquarters Fuji Electric Co. Ltd. Hino Japan

ISBN: (数字)9781839539923

For the relaxation of electric field (E-field) stress around Gas Insulated Switchgears (GIS) spacer, we have proved the effectiveness of an application of spacer with functionally graded materials (FGM) with a spatial distribution of permittivity ε (ε-FGM). However, we have investigated the effectiveness of the FGM spacer only in the case of single-core type GIS, so far. For wider application of the FGM spacer, it is needed to investigate its effectiveness not only in single-core type but also in three-core type GIS. For this purpose, in this paper, we carried out the three-dimensional electric field analysis for three-core type GIS, in order to investigate the E-field relaxation effect by an application of ε-FGM spacer. Firstly as fundamental investigations, we consider a simplified model for a three-core type FGM spacer. The cone-type spacer model for the three-core type GIS is used. We added ε distribution into the internal part of the spacer. Then we calculate E-field stress in and around three-core type GIS spacer for various ε distributions inside the spacer. Finally, we quantified relaxation effect of the maximum E-field stress.

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research on failure analysis and quality improvement of acceleration sensor in rail transit 2

Research on failure analysis and quality improvement of acce...

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2nd International conference on Artificial Intelligence and Electromechanical Automation, AIEA 2021

作者： Xuguang, Lin Wenjun, Wang Yi, ren Crrc Changchun Railway Vehicles Co.Ltd. Jilin Changchun China Fundamental R&D Department of National Engineering Research Center of Railway Vehicles Jilin Changchun China Jilin Special Equipment Supervision and Inspection Center Jilin Changchun China

ISBN: (纸本)9781665432658

Quality improvement involves a combined effort among FMEA, targeted fault analysis to achieve corresponding improvement in the system. It involves three steps: setting aims to focus improvement, choosing a balanced set of measures to determine if improvement occurs, and testing new ideas to change the current process. The study carries out failure analysis based on FMEA analysis to do quality improvement efficiently. The quality improvement shows a good result with acceleration sensor of rail transit. © 2021 IEEE.

关键词： Failure analysis

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design of a Single Chip HF-UHF dual-Band rFId Tag Antenna 12th

Design of a Single Chip HF-UHF Dual-Band RFID Tag Antenna

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12th China Academic conference on Printing and Packaging, CACPP 2021

作者： Yang, Zhao Zhang, Yuan Zhu, Lei Shen, Lin du, Yanping Yu, Chaohui School of Mechanical and Electrical Engineering Beijing Institution of Graphic Communication Beijing China Postal Technology R&D Center Beijing Institution of Graphic Communication Beijing China Beijing Urbane Culture Communication Co. Ltd. Beijing China School of Printing and Packing Engineering Beijing Institution of Graphic Communication Beijing China

ISBN: (纸本)9789811916724

To improve the working performance of radio frequency identification (rFId) tags and reduce the size of the tags, a compact dual-band high-frequency (HF) and ultrahigh-frequency (UHF) passive rFId tag antenna is designed that works in the 13.56 MHz band as well as in the 915 MHz band in this paper. For the chip used (EM4423), the dual-band antenna is composed of an 11-turn spiral coil calculated by the modified Wheeler formula and a symmetrical dipole antenna with a matching ring. The designed dual-band antenna has a good impedance match with the chip used and it operates frequency from 849 MHz to 939 MHz covering the UHF operating band of China, the United States, Europe, and so on. The experimental results reveal that the maximum gain of UHF-rFId tag antenna is 1.3 dB. In addition, the size of the antenna is 46.4 × 41 × 0.03 mm3, realizing the design goal of dual-band rFId tag antenna miniaturization. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte ltd.

关键词： dipole antennas

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