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Conference on Computer Vision and Pattern Recognition (CVPR)

作者： Jianghao Xiong Jianhuang Lai School of Computer Science and Engineering Sun Yat-Sen University China Guangdong Province Key Laboratory of Information Security Technology China Key Laboratory of Machine Intelligence and Advanced Computing Ministry of Education China Key Laboratory of Video and Image Intelligent Analysis and Applicaiton Technology Ministry of Public Security China

Group re-identification (G-ReID) aims to re-identify a group of people that is observed from non-overlapping camera systems. The existing literature has mainly addressed RGB-based problems, but RGB-infrared (RGB-IR) cross-modality matching problem has not been studied yet. In this paper, we propose a metric learning method Closest Permutation Matching (CPM) for RGB-IR G-ReID. We model each group as a set of single-person features which are extracted by MPANet, then we propose the metric Closest Permutation Distance (CPD) to measure the similarity between two sets of features. CPD is invariant with order changes of group members so that it solves the layout change problem in G-ReID. Furthermore, we introduce the problem of G-ReID without person labels. In the weak-supervised case, we design the Relation-aware Module (RAM) that exploits visual context and relations among group members to produce a modality-invariant order of features in each group, with which group member features within a set can be sorted to form a robust group representation against modality change. To support the study on RGB-IR G-ReID, we construct a new large-scale RGB-IR G-ReID dataset CM-Group. The dataset contains 15,440 RGB images and 15,506 infrared images of 427 groups and 1,013 identi-ties. Extensive experiments on the new dataset demonstrate the effectiveness of the proposed models and the complexity of CM-Group. The code and dataset are available at: https://***/WhollyOat/CM-Group.

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Semivortex solitons and their excited states in spin-orbit-coupled binary bosonic condensates

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Physical Review E 2024年第6期109卷 064201-064201页

作者： Haiming Deng Jinqing Li Zhaopin Chen Yaohui Liu Dong Liu Chunzhi Jiang Chao Kong Boris A. Malomed School of Physics and Electronic-Electrical Engineering Microelectronics and Optoelectronics Technology Key Laboratory of Hunan Higher Education Hunan Engineering Research Center of Advanced Embedded Computing and Intelligent Medical Systems Physics Department and Solid-State Institute Department of Physical Electronics School of Electrical Engineering Faculty of Engineering Instituto de Alta Investigación

It is known that two-dimensional two-component fundamental solitons of the semivortex (SV) type, with vorticities (s+,s−)=(0,1) in their components, are stable ground states (GSs) in the spin-orbit-coupled (SOC) binary Bose-Einstein condensate with the contact self-attraction acting in both components, in spite of the possibility of the critical collapse in the system. However, excited states (ESs) of the SV solitons, with the vorticity set (s+,s−)=(S+,S++1) and S+=1,2,3,..., are unstable in the same system. We construct ESs of SV solitons in the SOC system with opposite signs of the self-interaction in the two components. The main finding is stability of the ES-SV solitons, with the extra vorticity (at least) up to S+=6. The threshold value of the norm for the onset of the critical collapse, Nthr, in these excited states is higher than the commonly known critical value, Nc≈5.85, associated with the single-component Townes solitons, Nthr increasing with the growth of S+. A velocity interval for stable motion of the GS-SV solitons is found too. The results suggest a solution for the challenging problem of the creation of stable vortex solitons with high topological charges.

关键词： Solitons

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Development of Phase-Field Modeling in Materials Science in China:A Review

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Acta Metallurgica Sinica(English Letters) 2023年第11期36卷 1749-1775页

作者： Yuhong Zhao Hui Xing Lijun Zhang Houbing Huang Dongke Sun Xianglei Dong Yongxing Shen Jincheng Wang Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Shaanxi Basic Discipline(Liquid Physics)Research CenterNorthwestern Polytechnical UniversityXi’an710129China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081China Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments School of Mechanical EngineeringSoutheast UniversityNanjing211189China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an710072China School of Materials Science and Engineering Collaborative Innovation Center of Ministry of Education and Shanxi Province for High-Performance Al/Mg Alloy MaterialsNorth University of ChinaTaiyuan030051China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang110004China

Phase-field method,as a powerful and popular approach to predict the mesoscale microstructure evolution in various materials science,provides a bridge from atomic-scale methods to the macroscale and has been widely used at an ever-increasing *** paper aims to briefly review the origin,basic idea,and development of phase-field models in a historical *** focus is placed on the classical and state-of-the-art applications in China,including liquid–solid,solid–solid,gas–solid,ferroelectrics/ferromagnetics phase transformation,and crack *** introducing the academic activities in the phase-field community in China,some suggestions for the future development directions of phase-field method are finally mentioned.

关键词： Phase-field method Microstructure Phase transformation Various materials design

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A Vulnerability Detection Method for Intermediate Code Based on a Relational Dependency Graph

A Vulnerability Detection Method for Intermediate Code Based...

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IEEE International Conference on Trust, Security and Privacy in computing and Communications (TrustCom)

作者： Bing Xia Chongjun Tang Wenbo Liu Shihao Chu Yu Dong Dept. ZhongYuan University of Technology Key Laboratory of Mathematical Engineering and Advanced Computing Zhengzhou China Dept. ZhongYuan University of Technology Henan Key Laboratory on Public Opinion Intelligent Analysis Zhengzhou China Dept. ZhongYuan University of Technology Zhengzhou China Dept. ZhongYuan University of Technology

ISBN: (数字)9798331506209

ISBN: (纸本)9798331506216

With the advancement of information technology, the rapid increase in software systems has led to a growing demand for research on vulnerability detection. In recent years, the fast-paced development of deep learning has introduced new approaches and directions for this field. Existing source code vulnerability detection methods often fail to explicitly preserve the semantic information related to vulnerabilities in the source code, leading to difficulties in extracting vulnerable code features and high false-positive rates in detection. To address these issues, this study proposes a vulnerability detection method for intermediate code based on a relational dependency graph (RDG). After converting the source code into an intermediate representation, it is mapped to an RDG, which accurately expresses the data and control flow dependencies within the program. This approach retains critical node features and refines the types of control flow and data flow edges. By leveraging this method, it becomes possible to trace program data and control dependencies, understand data flow directions, and analyze interactions between different parts of the program, enabling the precise identification and interpretation of potential security vulnerabilities. Drawing on concepts from code property graphs (CPG), this method enhances the understanding and capture of complex relationships between nodes in graph-structured data. By performing vulnerability detection on intermediate code, this approach avoids false positives and negatives caused by language or platform-specific differences, thereby enabling deeper identification and interpretation of complex vulnerability patterns in source code. Experimental results on the SARD dataset demonstrate that the proposed method achieves a high precision rate of 98.7% for detecting command injection vulnerabilities (CWE78), significantly outperforming traditional methods.

关键词： Deep learning Privacy Codes Source coding Semantics Feature extraction Software systems Graph neural networks Security Information technology

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LACOSTE: Exploiting stereo and temporal contexts for surgical instrument segmentation

arXiv

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arXiv 2024年

作者： Wang, Qiyuan Zhao, Shang Xu, Zikang Zhou, S. Kevin Anhui Hefei230026 China Suzhou Institute for Advanced Research USTC Jiangsu Suzhou215123 China Key Laboratory of Precision and Intelligent Chemistry USTC Anhui Hefei230026 China Institute of Computing Technology CAS Beijing100190 China

Surgical instrument segmentation is instrumental to minimally invasive surgeries and related applications. Most previous methods formulate this task as single-frame-based instance segmentation while ignoring the natural temporal and stereo attributes of a surgical video. As a result, these methods are less robust against the appearance variation through temporal motion and view change. In this work, we propose a novel LACOSTE model that exploits Location-Agnostic COntexts in Stereo and TEmporal images for improved surgical instrument segmentation. Leveraging a query-based segmentation model as core, we design three performance-enhancing modules. Firstly, we design a disparity-guided feature propagation module to enhance depth-aware features explicitly. To generalize well for even only a monocular video, we apply a pseudo stereo scheme to generate complementary right images. Secondly, we propose a stereo-temporal set classifier, which aggregates stereo-temporal contexts in a universal way for making a consolidated prediction and mitigates transient failures. Finally, we propose a location-agnostic classifier to decouple the location bias from mask prediction and enhance the feature semantics. We extensively validate our approach on three public surgical video datasets, including two benchmarks from EndoVis Challenges and one real radical prostatectomy surgery dataset GraSP. Experimental results demonstrate the promising performances of our method, which consistently achieves comparable or favorable results with previous state-of-the-art approaches. Copyright © 2024, The Authors. All rights reserved.

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Tailoring structural, mechanical, and electronic properties of (Ti0.25Ta0.25Zr0.25Nb0.25-xLax)C high-entropy carbide ceramics via rare-earth La incorporation: A comprehensive first-principles study

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Ceramics International 2025年

作者： Wang, Zhipeng Yu, Zhaowen Zhang, Linkun Liu, Feng Huang, Lan Wang, Yan Tan, Liming Wang, Zi Ma, Li Tang, Pingying School of Materials Science and Engineering Dongguan University of Technology Guangdong Province Dongguan523808 China State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle Hunan University Hunan Province Changsha410082 China State Key Laboratory for Powder Metallurgy Central South University Hunan Province Changsha410083 China Guangxi Key Laboratory of Functional Information Materials and Intelligent Information Processing Nanning Normal University Guangxi Province Nanning530001 China

High-entropy carbide ceramics (HECCs) exhibit exceptional material properties, but their underlying physical mechanisms are underexplored. This study utilizes first-principles calculations to examine the influence of rare-earth La on the structural, mechanical, dislocation, and electronic properties of (Ti0.25Ta0.25Zr0.25Nb0.25-xLax)C (x = 0∼18.75 %) HECCs. key parameters, including formation enthalpy, lattice distortion, elastic constants, mechanical modulus, and density of states, are systematically analyzed as a function of La content. Results show that La preferentially substitutes Nb sites, forming thermodynamically stable rock-salt structures. Increased La content induces severe lattice distortion, reduces resistance to bulk, elastic, and shear deformation, and enhances ductility while decreasing brittleness. La incorporation also lowers Vickers hardness and yield strength, weakening crack resistance. Notably, (Ti0.25Ta0.25Zr0.25Nb0.0625La0.1875)C exhibits minimal energy factors and maximum dislocation width, facilitating dislocation nucleation and twinning. A rightward shift and reduced peak heights in valence band of total density of states curves with increasing La content indicate enhanced electron delocalization and reduced brittleness. These findings highlight the potential of La substitution to tailor structural, mechanical, and electronic properties in (Ti0.25Ta0.25Zr0.25Nb0.25-xLax)C HECCs, offering insights for designing ductile HECCs. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Vickers hardness

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design, Analyze, and Simulation of a Bionic Swept-Back Wing Scheme with Force Amplification Mechanism

Design, Analyze, and Simulation of a Bionic Swept-Back Wing ...

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Aerospace Engineering and Systems (ISAES), International Symposium on

作者： Jiangpeng Wu Huixiang Du Xinmeng Ma Manhong Li Libin Zhao Ning Hu Shenyang Aircraft Design and Research Institute Shenyang China School of Mechanical Engineering Hebei University of Technology Tianjin China Key Laboratory of Advanced Intelligent Protective Equipment Technology Ministry of Education Hebei University of Technology Tianjin China

ISBN: (数字)9798350350418

ISBN: (纸本)9798350350425

Compared with traditional aircraft, the variant aircraft can change the shape of its fuselage or wing to adapt to the needs of different flight conditions. Among them, the variable swept-back wing can provide excellent aerodynamic characteristics for the morphing aircraft by adjusting the swept back angle of the wing. Aiming at the problem of the existing variable swept-back wings encroach on the belly space. Based on the principles of mechanism and bionics, this paper innovatively puts forward a design scheme of wing root bending variable swept-wing without encroaching on the belly space and designs a force amplification mechanism, which is reasonable according to the principle of virtual work. It is verified to be able to amplify the force by 130% through a set of eigenvalues. It provides certain references for the design of the variable swept-back wing.

关键词： Analytical models Shape Simulation Biomimetics Force Kinematics Bending Bones Eigenvalues and eigenfunctions Aircraft

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Lateral and Longitudinal Coordinated Control of intelligent Vehicle Based on High-Precision Dynamics Model under High-Speed Limit Condition

IEEE Transactions on Intelligent Vehicles

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IEEE Transactions on intelligent Vehicles 2024年 1-18页

作者： He, Zhicheng Gong, Liangke Zhou, Enlin Wei, Baolv Li, Eric Huang, Jin State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle the College of Mechanical and Transportation Engineering Hunan University Changsha China School of Computing Engineering & Digital Technologies Teesside University Middlesbrough U.K School of Vehicle and Mobility Tsinghua University Beijing China

This study focuses on improving the trajectory tracking control for intelligent vehicles in high-speed and large curvature limit conditions. To this end, a high-precision five-degree-of-freedom (5-DOF) dynamics model (HPM) that incorporates suspension characteristics is introduced. Furthermore, a coordinated lateral and longitudinal control system is developed. The lateral model predictive control (MPC) involves two crucial stages: initially, a desired trajectory with associated speed data is generated based on path curvature. Subsequently, using the high-precision 5-DOF dynamics model, an objective function is formulated to minimize the difference between the vehicle's current state and the desired state. This process determines the optimal front wheel steering angle, taking into account vehicle positional constraints and steering limitations. Additionally, a double proportional-integral-derivative (PID) controller for longitudinal control adjusts the throttle and brake pressure based on real-time position and speed data, ensuring integrated control over both lateral and longitudinal movements. The effectiveness of this approach is confirmed through real vehicle testing and simulation. Results show that the high-precision 5-DOF dynamics model markedly enhances the accuracy of vehicle response modeling, and the coordinated control system successfully executes precise trajectory tracking. In extreme scenarios of high-speed and large curvature, the enhanced model substantially improves trajectory accuracy and driving stability, thus promoting safe vehicle operation. IEEE

关键词： Trajectories

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A clock synchronization method for EtherCAT master

A clock synchronization method for EtherCAT master

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2023智能制造与机械动力学学术大会

作者： Libo Cao Taiyong Wang Yongbin Zhang Songhui Jia Chong Tian Ying Tian Qingjian Liu School of Mechanical Engineering Tianjin University Renai College Tianjin University Tianjin Key Laboratory for Advanced Mechatronic System Design and Intelligent Control School of Mechanical EngineeringTianjin University of Technology

EtherCAT has been widely applied in the motion control domain due to its advantages of the fast response speed,low CPU usage and good synchronization *** the distributed clock synchronization mechanism shows strong performance between the slaves,the clock synchronization method between the master clock and the reference clock is still open for users to choose,and there are few studies in this *** paper proposed a novel clock synchronization mechanism between the master of CNC system and the reference slave which also call servo motor of drive *** mechanism relies on sync0 of the reference servo ***0 is very stable and almost no time jitter,which is a dozen *** clock of the master of the numerical control system(CNC) adjusted the trigger moment of the interpolation period adaptively and dynamically to realize synchronization between master and reference servo motor taking sync0 as *** addition,the proposed method almost hardly add computational load and modify the EtherCAT frames by adding four bytes only without increasing an excessive communication load in the interpolation *** synchronization mechanism fills the gap of distributed clock synchronization which is the synchronization mechanism between reference servo motor and the other servo *** are preformed to verify the synchronization *** results demonstrate that the jitters of EtherCAT frames are measured to be only 112ns and 95.5 ns.

关键词： the CNC system synchronization reference slave sync0

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Single-cell technologies: current and near future

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Science China(Life Sciences) 2025年第1期68卷 1-4页

作者： Chenfei Wang Qi Liu Xiaohui Fan Tieliu Shi KeyLaboratory of Spine and Spinal CordInjury Repairand Regeneration Ministry of EducationOrthopedics DepartmentTongji HospitalBioinformatics DepartmentSchoolofLifeSciencesandTechnologyTongji UniversityShanghai 200082China Frontier Science Center for Stem Cells School of Life Sciences and TechnologyTongji UniversityShanghai 200092China Translational Medical Center for Stem Cell Therapy and Institute for Regenerative Medicine Shanghai East HospitalBioinformatics DepartmentSchool of Life Sciences and TechnologyTongji UniversityShanghai 200082China Research Institute of Intelligent Computing Zhejiang LabHangzhou 311121China Pharmaceutical Informatics Institute College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China National Key Laboratory of Chinese Medicine Modernization Innovation Center of Yangtze River DeltaZhejiang UniversityJiaxing 314103China Center for Bioinformatics and Computational Biology Shanghai Key Laboratory of Regulatory Biologythe Institute of Biomedical Sciences and School of Life SciencesEast China Normal UniversityShanghai 200241China Key Laboratory of Advanced Theory and Application in Statistics and Data Science(MOE) School of StatisticsEast China Normal UniversityShanghai 200062China

Single-cell technologies enable the indepth exploration of multiple biological hierarchies at the scale of individual cells,which have deepened our knowledge of cellular diversity,tissue organization,and overall organism function(Sun et al.,2024).In 2009,single-cell RNA sequencing(scRNA-seq)was first developed as a powerful tool to dissect gene expression and uncover transcriptional *** the rapid advancement of technology,single-cell approaches have expanded to encompass other omics,such as genomics,epigenomics,proteomics,and ***,multimodal technologies including spatially resolved transcriptomics and clustered regularly interspaced short palindromic repeats(CRISPR)screening at the single-cell level further advanced our ability to comprehensively understand cellular ***-cell methods provide deeper insights into disease mechanisms across various conditions,including cancer,developmental disorders,and aging-associated *** this issue,we focus on topics related to single-cell methods,covering the following four aspects:(i)single-cell multi-omic sequencing technology;(ii)single-cell spatial technology;(iii)singlecell CRISPR screening technology;(iv)applications of single-cell technology.

关键词： expanded enable insight

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