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14th International Conference on Frontier Computing, FC 2024

作者： Cheng, Huiying Shang, Wei Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and Lakes Ministry of Education Hubei University of Technology Wuhan China

ISBN: (纸本)9789819623907

Traditional graphic design methods provide designers with design materials through templates, which cannot reflect their true design intentions. To this end, a new planar design method based on 3D virtual vision technology is proposed. Provide a development environment, use a mouse for hand drawing, and form a stroke by obtaining an ordered sequence of points. Complete the denoising process of hand drawn strokes through smooth denoising methods, and fit the hand drawn strokes through quadratic B-spline curves. On this basis, 3D virtual modeling is performed on hand drawn strokes to achieve graphic design. After establishing a 3D model of a graphic design work, color rendering is used to improve the visual effect. The experimental results show that the proposed method can effectively achieve 3D virtual modeling based on hand drawn strokes, making the obtained 3D renderings more realistic, meeting the requirements of designers, and helping designers demonstrate real design intentions. The comparative experiment of simulated platform usage environment design shows that the application of an indoor design platform based on 3D virtual vision can draw indoor design plane images and three-dimensional images, and the position of the indoor landscape in the images is more in line with practical needs. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Virtual environments

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Efficient blocked symmetric compressed sparse column method for finite element analysis

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Frontiers of Mechanical Engineering 2025年第1期20卷 87-104页

作者： Yingjun WANG Shijie LUO Jinyu GU Yuanfang ZHANG National Engineering Research Center of Novel Equipment for Polymer Processing The Key Laboratory of Polymer Processing Engineering of the Ministry of EducationGuangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced ManufacturingSouth China University of TechnologyGuangzhou 510641China Shien-Ming Wu School of Intelligent Engineering South China University of TechnologyGuangzhou 511442China

In finite element analysis(FEA),optimizing the storage requirements of the global stiffness matrix and enhancing the computational efficiency of solving finite element equations are pivotal *** address these goals,we present a novel method for compressing the storage of the global stiffness matrix,aimed at minimizing memory consumption and enhancing FEA *** method leverages the block symmetry of the global stiffness matrix,hence named the blocked symmetric compressed sparse column(BSCSC)*** also detail the implementation scheme of the BSCSC method and the corresponding finite element equation solution *** approach optimizes only the global stiffness matrix index,thereby reducing memory requirements without compromising FEA computational *** then demonstrate the efficiency and memory savings of the BSCSC method in FEA using 2D and 3D cantilever beams as *** addition,we employ the BSCSC method to an engine connecting rod model to showcase its superiority in solving complex engineering ***,we extend the BSCSC method to isogeometric analysis and validate its scalability through two examples,achieving up to 66.13%memory reduction and up to 72.06%decrease in total computation time compared to the traditional compressed sparse column method.

关键词： finite element analysis global stiffness matrix blocked symmetric property memory reduction isogeometric analysis

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FedDCT: A Dynamic Cross-Tier Federated Learning Framework in Wireless Networks 18th

FedDCT: A Dynamic Cross-Tier Federated Learning Framework in...

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18th International Conference on Wireless Artificial intelligent Computing Systems and Applications, WASA 2024

作者： Xian, Youquan Gan, Xiaoyun Yao, Chuanjian Li, Dongcheng Wang, Peng Liu, Peng Zhao, Ying Key Lab of Education Blockchain and Intelligent Technology Ministry of Education Guangxi Normal University Guilin54104 China School of Computer Science and Engineering Guangxi Normal University Guilin54104 China School of Business Guilin University of Electronic Technology Guilin54104 China

ISBN: (纸本)9783031714634

Federated Learning (FL), as a privacy-preserving machine learning paradigm, trains a global model across devices without exposing local data. However, resource heterogeneity and inevitable stragglers in wireless networks severely impact the efficiency and accuracy of FL training. In this paper, we propose a novel Dynamic Cross-Tier Federated Learning framework (FedDCT). Firstly, we design a dynamic tiering strategy that dynamically partitions devices into different tiers based on their response times and assigns specific timeout thresholds to each tier to reduce single-round training time. Then, we propose a cross-tier device selection algorithm that selects devices that respond quickly and are conducive to model convergence to improve convergence efficiency and accuracy. Experimental results demonstrate that the proposed approach under wireless networks outperforms the baseline approach, with an average reduction of 54.7% in convergence time and an average improvement of 1.83% in convergence accuracy. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Federated learning

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Finite-Time Consensus of Second-Order Multiagent Systems With Input Saturation via Hybrid Sliding-Mode Control

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IEEE Transactions on Automation Science and Engineering 2025年 22卷 14623-14632页

作者： Jiang, Xiaowei Jiao, Ranran Li, Bo Zhang, Xianhe Yan, Huaicheng China University of Geosciences School of Automation Wuhan430079 China Ministry of Education Hubei Key Laboratory of Advanced Control and Intelligent Automation of Complex Systems Engineering Research Center of Intelligent Geodetection Technology Wuhan430074 China Ministry of Education Key Laboratory of System Control and Information Processing Shanghai200240 China Anhui University of Finance and Economics School of Finance Bengbu233030 China Hubei Normal University School of Electrical Engineering and Automation Huangshi435002 China Ministry of Education East China University of Science and Technology Key Laboratory of Smart Manufacturing in Energy Chemical Process Shanghai200237 China

This paper addresses the finite-time consensus (FTC) issue for second-order multi-agent systems (MASs) with nonlinear disturbances. To tackle the challenges posed by increasingly complex communication environments, an innovative integral sliding-mode surface is designed using event-triggered control. Furthermore, the study explores communication constraints between the leader and followers, employing impulsive control to facilitate communication only at specific intervals. A novel hybrid integral sliding-mode control protocol is advanced for the second-order MASs, which effectively eliminates the "Zeno phenomenon" and notably reduces both communication frequency and energy consumption, thereby enhancing overall communication efficiency. Ultimately, the efficacy of the put forward protocol is verified through simulation examples including comparison experiment. © 2004-2012 IEEE.

关键词： Protocols Sliding mode control Event detection Multi-agent systems Costs Training Topology Switches Sufficient conditions Stability analysis

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Penalty Function-Based Distributed Primal-Dual Algorithm for Nonconvex Optimization Problem

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IEEE/CAA Journal of Automatica Sinica 2025年第2期12卷 394-402页

作者： Xiasheng Shi Changyin Sun IEEE the Engineering Research Center of Autonomous Unmanned System Technology Ministry of Education Anhui University the School of Artificial Intelligence Anhui University Anhui Provincial Engineering Research Center for Unmanned System and Intelligent Technology Anhui University the Anhui Key Laboratory Industrial Energy-Saving and Safety Anhui University

This paper addresses the distributed nonconvex optimization problem, where both the global cost function and local inequality constraint function are nonconvex. To tackle this issue, the p-power transformation and penalty function techniques are introduced to reframe the nonconvex optimization problem. This ensures that the Hessian matrix of the augmented Lagrangian function becomes local positive definite by choosing appropriate control parameters. A multi-timescale primal-dual method is then devised based on the Karush-Kuhn-Tucker(KKT) point of the reformulated nonconvex problem to attain convergence. The Lyapunov theory guarantees the model's stability in the presence of an undirected and connected communication network. Finally, two nonconvex optimization problems are presented to demonstrate the efficacy of the previously developed method.

关键词： Constrained optimization Karush-Kuhn-Tucker (KKT) point nonconvex p-power transformation

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Research on wear state prediction of ball end milling cutter based on entropy measurement of tool mark texture images

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Journal of Central South University 2025年第1期32卷 174-188页

作者： LI Mao-yue LU Xin-yuan LIU Ze-long ZHANG Ming-lei Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of EducationHarbin University of Science and TechnologyHarbin 150080China

Efficient tool condition monitoring techniques help to realize intelligent management of tool life and reduce tool usage *** this paper,the influence of different wear degrees of ball-end milling cutters on the texture shape of machining tool marks is investigated,and a method is proposed for predicting the wear state(including the position and degree of tool wear)of ball-end milling cutters based on entropy measurement of tool mark texture ***,data samples are prepared through wear experiments,and the change law of the tool mark texture shape with the tool wear state is ***,a two-dimensional sample entropy algorithm is developed to quantify the texture ***,the processing parameters and tool attitude are integrated into the prediction process to predict the wear value and wear position of the ball end milling *** testing,the correlation between the predicted value and the standard value of the proposed tool condition monitoring method reaches 95.32%,and the accuracy reaches 82.73%,indicating that the proposed method meets the requirement of tool condition monitoring.

关键词： ball-end cutter wear tool condition monitoring surface texture texture quantifier sample entropy

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Fabrication of Zn-0.5Mn-0.05 Mg Micro-Tube with Suitable Strength and Ductility for Vascular Stent Application

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Acta Metallurgica Sinica(English Letters) 2025年第2期38卷 327-337页

作者： Dongfang Lou Mingda Zhang Yuping Ren Hongxiao Li Gaowu Qin Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

Biodegradable Zn alloys are a hot topic in the biodegradable vascular stent materials,the study on preparing Zn alloys microtubes for vascular stent is still insufficient and none of the tubes could well meet the mechanical requirement by *** this study,we fabricate Zn-0.5Mn-0.05 Mg microtube with outer diameter of 3.5 mm and wall thickness of 0.2 mm by five passes three-roller *** mechanical properties of the microtube are 277±2.9 MPa,330±3.3 MPa and 39.8±5.25%for the yield tensile strength(YTS),ultimate tensile strength(UTS)and break elongation,respectively,which well satisfies the requirements of the vascular *** leading factors to the variations of the mechanical property are texture evolution,grain size refinement and microstructure uniformity during the rolling process,and the main deformation mechanisms are twinning and dislocation *** a result of the dynamic recrystallization,the grain size decreases obviously and the microstructure gets more uniform as the rolling pass *** texture gradually changes from a basal texture<0110>‖ED(extrusion direction)for the as-extruded tube blank to deformation texture<0001>‖RD(rolling direction)and non-basal texture<0221>‖RD for the 5-pass rolled microtube.

关键词： Zn alloys Microtube Microstructure Mechanical property Three-roller rolling

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Bearing Fault Diagnosis Under Variable Working Conditions Based on Domain Adaptation and Improved Depthwise Separable Convolution Network 26

Bearing Fault Diagnosis Under Variable Working Conditions Ba...

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26th International Conference on Industrial technology, ICIT 2025

作者： Kuang, Zehui Mao, Fan Zhao, Xingyu Wan, Xiongbo School of Automation China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan China School of Future Technology China University of Geosciences Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems Engineering Research Center of Intelligent Technology for Geo-Exploration Ministry of Education Wuhan China

ISBN: (纸本)9798331521950

Domain adaptation methods and appropriate feature extractors are usually applied to solve the problem that the variable working conditions of bearings affect the effectiveness of the fault diagnostic framework. However, the existing feature extractors are too complex to be deployed in real industries. In this paper, we propose a lightweight framework called improved depthwise separable convolution network (IDSCN) for the diagnosis of bearing faults in variable operating conditions. IDSCN is built on wavelet convolution and depthwise separable residual convolution (DSRC), where the wavelet convolution is used to extract frequency features from the source and target domains, and DSRC guarantees the performance of feature extraction with reduced parameters and computation. To minimise the distribution difference between the source and target domains, the local maximum mean difference is incorporated into the proposed framework. The performance of the proposed framework is validated on the Paderborn University dataset, involving a total of 6 transfer tasks. The experiment shows that the proposed framework achieves satisfactory results and outperforms other frameworks in bearing fault diagnosis. © 2025 IEEE.

关键词： Bearing fault diagnosis Depthwise separable residual convolution Domain adaptation Wavelet convolution

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Strength and Deformation Behaviors of Hydrate-Bearing Silty-Clayey Sediments With Different Compaction Patterns

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SPE Journal 2025年第4期30卷 1941-1955页

作者： Zhang, Chenyi Luo, Tingting Han, Tao Zhang, Yu Tian, Zhuangcai Sun, Peixin Xue, Yong Li, Yanghui Yang, Weihao Madhusudhan, B.N. School of Mechanics and Civil Engineering China University of Mining and Technology State Key Laboratory of Intelligent Construction and Healthy Operation & Maintenance of Deep Underground Engineering China Dalian University of Technology Key Laboratory of Ocean Energy Utilization and Energy Conservation Ministry of Education China Faculty of Engineering and the Environment University of Southampton United Kingdom

Clarifying the mechanical response of hydrate-bearing silty-clayey sediments (HBSCSs) concerning various mining factors is crucial for safety and consecutive hydrate production. Comprehension of the impact of compaction patterns on the sediment structure within gas hydrate reservoirs, influenced by the geological age and setting, remains limited in the field. Two types of HBSCS samples were thus prepared, differentiated by the consolidation sequence: the CG sample, consolidated before hydrate formation, and the GC sample, consolidated after hydrate formation, corresponding to compaction patterns in this study, with their mechanical behaviors analyzed considering different influencing factors. The conclusions indicate that an initial shearing dilatancy peak occurs in volumetric strain curves of CG samples with 40% hydrate saturation. In addition, the shearing dilatancy trend of CG samples caused by strong particle exclusion and hydrate accumulation promotes the increase in strength and stiffness as well as the decrease in final volumetric strain of HBSCSs, when compared with GC samples. The frictional property of HBSCSs prepared by the CG method is stronger than that of the GC method due to hydrate displacing sediment particles, although weaker cemented property;there are increases of 9.54° and 0.46 MPa in the internal friction angle and cohesion of CG samples as the hydrate saturation increases from 0 to 40%, while the variation in internal friction angle of GC samples is inconspicuous. The results in this study provide potential theoretical support for predicting the compaction patterns on the mechanical behaviors of hydrate silty-clayey reservoirs. Copyright © 2025 Society of Petroleum Engineers.

关键词： Shearing

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Effects of Dual Incorporation of Nano-SiO_(2)and Nano-CaCO_(3)on the Abrasion Resistance and Microstructure of Concrete

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Journal of Wuhan University of technology(Materials Science) 2025年第2期40卷 509-518页

作者： SU Jun YANG Haixin WANG Songbo TIAN Jing CAI Xinhua SHUI Farun HUANG Fu XU Ziyang ZENG Qingdian FAN Zikang School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan 430068China Key Laboratory of Intelligent Health Perception and Ecological Restoration of Rivers and Lakes Ministry of EducationHubei University of TechnologyWuhan 430068China State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan UniversityWuhan 430072China

Seven sets of concrete containing different mass ratios of nano-SiO_(2)(0%-5.0%)and nano-CaCO_(3)(0%-1.5%)were designed.A total of 28 concrete cube specimens cured for 7 and 28 days were tested for compressive strength(14 specimens)and split tensile strength(14 specimens),while 7 cylindrical specimens cured for 28 days were tested for impact *** impact resistance of the concrete specimens was quantitatively analyzed by using impact strength(f_(a))and wear rate(L_^(a)),and the effect of dual incorporation of nano-SiO_(2)and nano-CaCO_(3)on the microstructure of concrete was further investigated by XRD and *** experimental results indicate that the incorporation of 5.0%nano-SiO_(2)and 1.5%nano-CaCO_(3)improves the mechanical properties and impact resistance of concrete most significantly,and the compressive strength,split tensile strength,and impact resistance increase by around 37.80%,35.31%,and 183.36%,respectively,compared with that of ordinary *** the microscopic level,nano-SiO_(2)reacts with C-H in a secondary hydration reaction to increase the number of C-S-H gels,which improves the pore structure in the matrix and favorably enhances the adhesion between aggregate and cement paste in the weakened layer,thus improving the abrasion resistance of concrete.

关键词： nano-SiO_(2) nano-CaCO_(3) mechanical properties abrasion resistance microstructure of concrete

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