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International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Qin, Zhen Zeng, Guo-Qiang Lu, Kang-Di Wang, Rong Wu, Jun-Yi National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology Wenzhou University Wenzhou325035 China College of Information Science and Technology Donghua University Shanghai201620 China

ISBN: (纸本)9789819618637

A standalone microgrid plays an important role in supplying power to residential and remote areas by integrating different types of distributed generation. One of the key open issues in both academic and engineering fields is how to provide an optimal planning strategy for distributed generations and storage systems in a standalone microgrid, considering multi-objective performance indices such as reliability and cost. In this paper, a novel constrained multi-objective population extremal optimization (CMOPEO) is proposed for standalone microgrid optimal planning. The fundamental concept of the suggested approach is to frame the problem as a standard constrained multi-objective problem, where power loss probability, fuel emission, and power cost of the system are considered as the objectives, and the maximum amount of extra power and the availability of renewable resources are the constraints. The superiority of the CMOPEO algorithm is demonstrated through simulation results on a standalone microgrid case over multi-objective particle swarm optimization. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Constrained optimization

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In-Vehicle Network Injection Attacks Detection Based on Feature Selection and Classification

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Automotive Innovation 2024年第1期7卷 138-149页

作者： Haojie Ji Liyong Wang Hongmao Qin Yinghui Wang Junjie Zhang Biao Chen Key Laboratory of Modern Measurement and Control Technology Ministry of EducationBeijing Information Science and Technology UniversityBeijing 100192China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China School of Transportation Science and Engineering Beihang UniversityBeijing 100191China Hefei Innovation Research Institute Beihang UniversityHefei 230012China

Detecting abnormal data generated from cyberattacks has emerged as a crucial approach for identifying security threats within in-vehicle *** transmission of information through in-vehicle networks needs to follow specific data for-mats and communication protocols ***,statistical algorithms are employed to learn these variation rules and facilitate the identification of abnormal ***,the effectiveness of anomaly detection outcomes often falls short when confronted with highly deceptive in-vehicle network *** this study,seven representative classification algorithms are selected to detect common in-vehicle network attacks,and a comparative analysis is employed to identify the most suitable and favorable detection *** consideration of the communication protocol characteristics of in-vehicle networks,an optimal convolutional neural network(CNN)detection algorithm is proposed that uses data field characteristics and classifier selection,and its comprehensive performance is *** addition,the concept of Hamming distance between two adjacent packets within the in-vehicle network is introduced,enabling the proposal of an enhanced CNN algorithm that achieves robust detection of challenging-to-identify abnormal *** paper also presents the proposed CNN classifica-tion algorithm that effectively addresses the issue of high false negative rate(FNR)in abnormal data detection based on the timestamp feature of data *** experimental results validate the efficacy of the proposed abnormal data detection algorithm,highlighting its strong detection performance and its potential to provide an effective solution for safeguarding the security of in-vehicle network information.

关键词： Classification algorithm Anomaly detection In-vehicle network Feature extraction Injecting attack

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Detection of the farmland plow areas using RGB-D images with an improved YOLOv5 model

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International Journal of Agricultural and Biological Engineering 2024年第3期17卷 156-165页

作者： Jiangtao Ji Zhihao Han Kaixuan Zhao Qianwen Li Shucan Du College of Agricultural Equipment Engineering Henan University of Science and TechnologyLuoyang 471003HenanChina Science&Technology Innovation Center for Completed Set Equipment Longmen LaboratoryLuoyang 471023HenanChina Collaborative Innovation Center of Machinery Equipment Advanced Manufacturing of Henan Province Luoyang 471003HenanChina School of Art and Design Henan University of Science and TechnologyLuoyang 471003HenanChina

Recognition of the boundaries of farmland plow areas has an important guiding role in the operation of intelligent agricultural *** precisely recognize these boundaries,a detection method for unmanned tractor plow areas based on RGB-Depth(RGB-D)cameras was proposed,and the feasibility of the detection method was *** method applied advanced computer vision technology to the field of agricultural *** and improving the YOLOv5-seg object segmentation algorithm,first,the Convolutional Block Attention Module(CBAM)was integrated into Concentrated-Comprehensive Convolution Block(C3)to form C3CBAM,thereby enhancing the ability of the network to extract features from plow *** GhostConv module was also utilized to reduce parameter and computational ***,using the depth image information provided by the RGB-D camera combined with the results recognized by the YOLOv5-seg model,the mask image was processed to extract contour boundaries,align the contours with the depth map,and obtain the boundary distance information of the plowed ***,based on farmland information,the calculated average boundary distance was corrected,further improving the accuracy of the distance *** experiment results showed that the YOLOv5-seg object segmentation algorithm achieved a recognition accuracy of 99%for plowed areas and that the ranging accuracy improved with decreasing detection *** ranging error at 5.5 m was approximately 0.056 m,and the average detection time per frame is 29 ms,which can meet the real-time operational *** results of this study can provide precise guarantees for the autonomous operation of unmanned plowing units.

关键词： plow areas RGB-D camera YOLO object segmentation contour boundary average distance

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Dual nanoprecipitation and nanoscale chemical heterogeneity in a secondary hardening steel for ultrahigh strength and large uniform elongation

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Journal of Materials science & technology 2024年第18期185卷 245-258页

作者： Shidong Wang Jinhua Wang Shijie Zhang Daixiu Wei Yang Chen Xuequan Rong Wu Gong Stefanus Harjo Xiaochun Liu Zengbao Jiao Zhigang Yang Gang Sha Chunxu Wang Guang Chen Hao Chen Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Engineering/Herbert Gleiter Institute of Nanoscience Nanjing University of Science and TechnologyNanjing 210094China National Key Laboratory of Advanced Casting Technologies MIIT Key Laboratory of Advanced Metallic and Intermetallic Materials TechnologyEngineering Research Center of Materials Behavior and DesignMinistry of EducationNanjing University of Science and TechnologyNanjing 210094China J-PARC Center Japan Atomic Energy AgencyIbaraki 319-1195Japan Institute of Metals College of Materials Science and EngineeringChangsha University of Science&TechnologyChangsha 410114China Department of Mechanical Engineering Research Institute for Advanced ManufacturingThe Hong Kong Polytechnic UniversityHong Kong 999077China Central Iron and Steel Research Institute Beijing 100081China

Nanoprecipitates and nanoscale retained austenite(RA)with suitable stability play crucial roles in deter-mining the yield strength(YS)and ductility of ultrahigh strength steels(UHSSs).However,owing to the kinetics incompatibility between nanoprecipitation and austenite reversion,it is highly challenging to si-multaneously introduce high-density nanoprecipitates and optimized RA in *** this work,through the combination of austenite reversion treatment(ART)and subsequent flash austenitizing(FA),nanoscale chemical heterogeneity was successfully introduced into a low-cost UHSS prior to the aging *** chemical heterogeneity involved the enrichment of Mn and Ni in the austenite *** resulting UHSS exhibited dual-nanoprecipitation of Ni(Al,Mn)and(Mo,Cr)_(2)C and nanoscale austenite stabilized via Mn and Ni *** hard martensitic matrix strengthened by high-density dual-nanoprecipitates con-strains the plastic deformation of soft RA with a relatively low fraction of-15%,and the presence of relatively stable nanoscale RA with adequate Mn and Ni enrichment leads to a marginal loss in YS but keeps a persistent transformation-induced plasticity(TRIP)*** a result,the newly-developed UHSS exhibits an ultrahigh YS of-1.7 GPa,an ultimate tensile strength(UTS)of-1.8 GPa,a large uniform elongation(UE)of-8.5%,and a total elongation(TE)of-13%.The strategy of presetting chemical heterogeneity to introduce proper metastable phases before aging can be extended to other UHSSs and precipitation-hardened alloys.

关键词： Ultrahigh strength steels Dual-nanoprecipitation Austenite stability TRIP effect Phase transformation

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Prediction of quantum anomalous Hall effect in CrI_(3)/ScCl_(2)bilayer heterostructure

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Chinese Physics B 2022年第10期31卷 507-513页

作者： Yuan Gao Huiping Li Wenguang Zhu International Center for Quantum Design of Functional Materials(ICQD) Hefei National Laboratory for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Department of Physics University of Science and Technology of ChinaHefei 230026China

Based on first-principles calculations,a two-dimensional(2D)van der Waals(vd W)bilayer heterostructure consisting of two topologically trivial ferromagnetic(FM)monolayers CrI_(3)and ScCl_(2)is proposed to realize the quantum anomalous Hall effect(QAHE)with a sizable topologically nontrivial band gap of 4.5 me *** topological nature is attributed to an interlayer band inversion between the monolayers and critically depends on the symmetry of the stacking *** further demonstrate that the topologically nontrivial band gap can be increased nearly linearly by the application of a perpendicular external pressure and reaches 8.1 me V at 2.7 GPa,and the application of an external out-of-plane electric field can also modulate the band gap and convert the system back to topologically trivial via eliminating the band *** effective model is developed to describe the topological phase evolution in this bilayer *** work provides a new candidate system based on 2D vd W materials for realization of potential high-temperature QAHE with considerable controllability.

关键词： quantum anomalous Hall effect two-dimensional heterostructure

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A High Gain Low SAR Wearable Antenna Based on AMC in Wireless Body Area Network

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IEEE Antennas and Wireless Propagation Letters 2025年第6期24卷 1362-1366页

作者： Qin, Yufeng Jiang, Dapeng Yang, Yuejie Wang, Cicheng Fu, Yang Ding, Fan Yang, Helin Central China Normal University College of Physical Science and Technology Wuhan430000 China China Ship Development and Design Center Wuhan430064 China Hanjiang National Laboratory Wuhan430070 China

A wearable dual-band antenna consisting of a ring radiating unit and an artificial magnetic conductor (AMC) is designed in wireless body area network (WBAN), and the substrate material chosen is felt, which is easy to bend and wear. The simulated maximum broadband gains are 6 dBi and 8.2 dBi at 2.45 GHz and 5.8 GHz, respectively, and the simulated maximum specific absorption rate (SAR) are 0.368W\kg and 0.222 W\kg, which are much lower than the international standards. The deformation analysis shows that the antenna can be used in the curved case and matches the performance in the planar case. The overall antenna fabrication process is simple, the experimental results and simulation results are basically consistent, and the designed antenna shows a high degree of consistency in free environment and simulated human body environment. The flexible antenna designed in this paper is expected to be applied to wireless wearable communication systems. © 2002-2011 IEEE.

关键词： Wearable antennas

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Effect of Zr addition on the stability of precipitated Laves phase and mechanical properties of Fe–Cr–Al-based alloys at high temperatures

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Progress in Natural science:Materials International 2022年第1期32卷 114-127页

作者： Ben Niu Zhenhua Wang Qing Wang Sen Ge Chuang Dong Ruiqian Zhang Huiqun Liu Peter K.Liaw Key Laboratory of Materials Modification by Laser Ion and Electron Beams (Ministry of Education) School of Materials Science and Engineering Dalian University of Technology Science and Technology on Reactor Fuel and Materials Laboratory Nuclear Power Institute of China School of Materials Science and Engineering Central South University Department of Materials Science and Engineering The University of Tennessee

The effect of a small amount of Zr addition on the temperature-dependent stability of Laves phase particles and mechanical properties of Fe-13.5Cr-4.73Al-2.07Mo-（0.34–0.5）Nb-（0.65–0.98）Ta-（0–0.33）Zr（wt. %） ferritic alloys was investigated in the present study. The designed alloy ingots were hot-rolled, aged at 1073 K for 24 h, and then re-treated at 1273 K, 1323 K, 1373 K, and 1473 K for 1 h, respectively. It was found that the Zr addition could not only stabilize the Fe2M Laves phase（M = Mo,Nb,Ta,Zr） to a much higher temperature, but also induce the formation of stable Fe23Zr6phase. The high-temperature（HT） microstructural stability of the alloys significantly was improved, as evidenced by the fact that a certain amount（0.66–1.19%） of precipitates(Fe2M, Fe23Zr6, and core(Fe23Zr6)-shell（Fe2M）-structured particles) with an appropriate size（～1.0 μm） uniformly distributed in the ferritic matrix even after being re-treated at 1473 K. Particularly, the formation of core-shell-structured particles at HTs was studied from the viewpoint of both solid solubility and diffusion coefficient of M in the matrix. All these aged alloys exhibited prominent mechanical properties at both room and elevated temperatures, showing high yield strength with σYS= 490–560 MPa at room-temperature and σYS= 80–85 MPa at 1073 K. The strengthening effect was further discussed in light of various strengthening mechanisms, and the calculated strength are in good agreement with the experimental results.

关键词： Fe-Cr-Al alloys Microstructural stability Phase transformation Core-shell-structured precipitates Strengthening mechanisms

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A Review:Principles and Applications of High-Pressure In Situ Time-Resolved Transient Absorption Spectroscopy

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Ultrafast science 2024年第2期4卷 45-59页

作者： Xiaxia Qin Guozhao Zhang Lin Chen Qinglin Wang Guangyu Wang Haiwa Zhang Yinwei Li Cailong Liu School of Physics Science and Information Technology Liaocheng UniversityLiaocheng 252059China Laboratory of Quantum Functional Materials Design and Application of Physics and Electronic Engineering Jiangsu Normal UniversityXuzhou 22116China

Time-resolved transient absorption(TA)spectroscopy measurement technology provides detailed information into the ultrafast dynamics by tracking the transitions and deactivation processes of the excited-state carriers,which holds vast potential for investigating processes related to the luminescence and nonradiative recombination of *** is considered a potent tool for tuning the carrier dynamic *** combination of high-pressure experimental technology and time-resolved TA spectroscopy measurement technology enables researchers to reveal the inherent relation between the structure and optical properties of materials,which is crucial for optimizing material performance and applications in the field of *** this review,the principles and the theoretical foundations of high-pressure time-resolved TA spectroscopy measurement technology will be introduced,and the research advancements in ultrafast dynamics processes of materials under high pressure will be summarized and *** addition,we will expound on the future prospects of time-resolved TA spectroscopy measurement technology to detect the ultrafast dynamic behaviors of materials and complexes under the coregulation of temperature and pressure.

关键词： materials resolved holds

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Experimental and numerical investigation of the propeller thrust reduction in bollard pull condition 2

Experimental and numerical investigation of the propeller th...

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2023 2nd International Conference on Mechanical, Aerospace technology and Materials Application, MATMA 2023

作者： Wen, Xiao Liu, Zhenghao Xu, Changjian Ding, Ju Marine Design and Research Institute of China Shanghai200011 China Science and Technology on Waterjet Propulsion Laboratory Shanghai200011 China

The polar ships are often in bollard pull condition, which is prone to induce propeller cavitation and cause thrust reduction, weakening the ship's ice-breaking ability. Based on the model tests and numerical simulations, this paper aims to investigate the propeller thrust reduction in the bollard pull condition. Firstly, the test of a self-designed ice class propeller under different cavitation numbers is carried out. The thrust reduction phenomenon is successfully captured and the hydrodynamic characteristics are obtained. Subsequently, the simulation based on Star-CCM+ is performed. It is found that the propeller thrust decreases almost linearly after the cavitation number reaches a certain threshold. When the cavitation number is equal to 0.25, the thrust decreases to 38.1% of that in the open water condition. By analyzing the mechanism of thrust reduction, the main reason is recognized that the average pressure of the blade face decreases greatly due to the influence of the cavitation on the blade back. © Published under licence by IOP Publishing Ltd.

关键词： Cavitation

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High precision and efficiency robotic milling of complex parts:Challenges,approaches and trends

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Chinese Journal of Aeronautics 2022年第2期35卷 22-46页

作者： Zerun ZHU Xiaowei TANG Chen CHEN Fangyu PENG Rong YAN Lin ZHOU Zepeng LI Jiawei WU School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Wuhan Digital Design and Manufacturing Innovation Centre Co. Ltd.Wuhan 430074China

Due to the advantages of large workspace,low cost and the integrated vision/force sensing,robotic milling has become an important way for machining of complex *** recent years,many scholars have studied the problems existing in the applications of robotic milling,and lots of results have been made in the dynamics,pose planning,deformation control etc.,which provides theoretical guidance for high precision and high efficiency of robotic *** the perspective of complex parts robotic milling,this paper focuses on machining process planning and control techniques including the analysis of the robot-workspace,robot trajectory planning,vibration monitoring and control,deformation monitoring and *** well as the principles of these technologies such as robot stiffness characteristics,dynamic characteristics,chatter mechanisms,and deformation *** methods and characteristics related to the theory and technology of robotic milling of complex parts are summarized *** latest research progress and achievements in the relevant fields are *** is hoped that the challenges,strategies and development related to robotic milling could be clarified through the carding work in this paper,so as to promote the application of related theories and technologies in high efficiency and precision intelligent milling with robot for complex parts.

关键词： Complex parts Deformation Dynamics Robotic milling Stiffness Vibration control

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