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

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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Effect of Room Temperature Ultrasonic Vibration Compression on the Microstructure Evolution and Mechanical Properties of AZ91 Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1135-1146页

作者： Ziyue Xu Huan Liu Luyao Li Chao Sun Xi Tan Baishan Chen Qiangsheng Dong Yuna Wu Jinghua Jiang Jiang Ma College of Materials Science and Engineering Hohai UniversityNanjing210000China Suzhou Research Institute of Hohai University Suzhou215000China Shenzhen Key Laboratory of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen518060China Institute of Medical Devices(Suzhou) Southeast UniversitySuzhou215163China Institute for Advanced Study Central South UniversityChangsha410083China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing211167China

To investigate the potential of direct ultrasonic vibration on improving the performance of magnesium alloys,this study first employed the ultrasonic vibration compression(UVC)on the solid solution treated AZ91 alloy,and explored its microstructure evolution and mechanical properties under *** only two seconds,the UVC alloys showed large deformation strains of 34.8–54.4%,and sudden increase of sample temperature to 243℃.Microstructure characterizations proved that UVC promoted the formation of abundant shear bands,fine grains,and the bimodal distribution of Mg17Al12 precipitates consisting of submicron particles located within the shear bands and nano-sized ones within the *** to the unique microstructure,the micro-hardness(and nano-hardness)value of UVC alloy was increased by 37.7%(35%)when compared with the solution-treated ***,the nano-modulus of the developed AZ91 alloy was also significantly increased to 62 GPa by statistical nanoindentation tests,which could be ascribed to increased Mg_(17)Al_(12) precipitates and decreased c/a value to some *** general,this work provides a new insight into the design and preparation of high-performance magnesium alloys by UVC at room temperature.

关键词： AZ91 alloys Ultrasonic vibration compression Precipitation Shear bands Mechanical properties

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Grain boundary-mediated strain response mechanism of AZ31 gradient- structure Mg alloy plate under uniaxial tensile loading

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Journal of Magnesium and Alloys 2025年第5期13卷 2283-2294页

作者： Niu, Wen Tao Li, Feng Li, Yuan Qi Wang, Zi Yi Sun, Lu School of Materials Science and Chemical Engineering Harbin University of Science and Technology Harbin150040 China Key Laboratory of Advanced Manufacturing and Intelligent Technology Ministry of Education Harbin University of Science and Technology Harbin150080 China Heilongjiang Provincial Key Laboratory of Light Metal Materials Modification & Green Forming Technology Harbin University of Science and Technology Harbin150040 China

The changes in strain gradient induced by grain boundaries are crucial for enhancing the plasticity of gradient magnesium (Mg) alloys. The change of strain distribution influence by grain boundaries during plastic deformation of the gradient structure was examined. In this paper, the gradient structure AZ31 Mg-alloy plate with the surface fine grain (FG) to the center coarse grain (CG) was fabricated using hard plate rolling (HPR). The microstructure and strain distribution of Mg-alloy with a gradient structure were analyzed by electron backscatter diffraction (EBSD) and Digital image correlation (DIC) during uniaxial tensile. The findings indicate that the gradient structure sample (GS sample) displays a uniform strain distribution during the tensile process. Coarse-grain sample (CG sample) have obvious strain concentration, which leads to premature fracture. Based on EBSD characterization, low-angle grain boundaries (LAGBs) accumulates in the CG during plastic deformation. Orientation of CG tends to the (0001) basal. At the same time, the density of geometrically necessary dislocations (GNDs) inside CG has changed, which improves the Heterogeneous deformation induced (HDI) stress of gradient structure. During the uniaxial tensile, LAGBs accumulates in CG and changes the strain distribution of the gradient structure, which induces the accumulation of GNDs, and hence improving the properties of the GS Mg-alloy. These findings unveil the mechanism of strength-plasticity synergism of GS alloys from a new perspective and offer insights into the application of GS in Mg-alloys. © 2024

关键词： Magnesium alloys

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Unraveling structure evolution failure mechanism in MoS_(2)anode for improving lithium storage stability

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Journal of Materials Science & technology 2022年第33期128卷 245-253页

作者： Guannan Zu Shiyu Xu Changhao Wang Hongyi Li Manchen Zhang Xiaoxing Ke Yuxiang Hu Ruzhi Wang Jinshu Wang Key Laboratory of Advanced Functional Materials of Education Ministry of China Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Microstructure and Properties of Solids Faculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China

2 H phase molybdenum disulfide(2 H-MoS_(2))possesses the two-dimensional layered structure and high theoretical capacity,presenting excellent lithiation-delithiation ***,the violent capacity decay within dozens of cycles still remains a great challenge due to lacking of in-depth failure ***,a novel decay-recovery-decay failure phenomenon upon long-term cycles is reported for the first time,which originates from the slow size change of Mo nanoparticles(NPs).Decay stages are triggered by many irregular-shaped Mo NPs with the increasing size up to~15 nm,leading to prominent pseudocapacitance failure and capacity *** recovery stages are attributed to the pulverization of coarse Mo NPs through surface sulfurization and accompanying *** overcome the instability issue,proper modifiers should be introduced to restrain the spontaneous growth of Mo NPs,such as aluminum oxide(Al_(2)O_(3)).The strong Mo-Al_(2)O_(3)bond gradually"drags"Al_(2)O_(3)fragments into the active material as the cycle continuously proceeds,resulting in the efficient refinement and the reversible conversion between Mo and MoS_(2).Therefore,the enhanced cycling stability and the capacity retention are successfully *** is expected to provide a new insight into the energy storage of transition metal chalcogenide anode materials in rechargeable batteries.

关键词： 2H-MoS_(2) Decay-recovery-decay Mo nanoparticles Al_(2)O_(3) Enhanced cycling stability

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Sustained Release of Branched-Chain Amino Acids from Slow-Digesting Whey Enhances Endurance Running Performance and Improves Skeletal Muscle Protein Synthesis in Mice

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Food Science and Human Wellness 2024年

作者： Juncai Leng Tingyi Zhou Yiming Jiang Beibei Wang Shuoming Liu Shiqi Zhang Li Li Wei Zhao State Key Laboratory of Food Science and Resources， School of Food Science and Technology， Jiangnan University Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology， Jiangnan University

Post-exercise whey protein isolate (WPI) supplement is beneficial for skeletal muscle recovery due to the stimulation of branched chain amino acids (BCAAs). This implies us that intake slow digestion rate of protein to sustain BCAAs releasing rate may facilitate muscle protein synthesis. To examine this hypothesis， we conducted a series of protein supplements including modified slow-digesting whey (SDW)， whey， hydrolyzed whey and casein， orally to mice undergoing endurance running. Our results showed that the SDW gavage constant supplied BCAAs in the serum of mice within 6 hours and significantly enhanced (P < 0.01) endurance exercise capacity， compared to other groups. In addition， the SDW supplementation increased the cross-sectional area of mice gastrocnemius fibers， as well as their muscle and liver glycogen content. It also increased the testosterone/cortisol ratio in serum and IL-6 levels in muscle， while it decreased the TNF-α levels and oxidative stress in muscle. Moreover， it may activate mechanistic target of rapamycin signaling by upregulating mRNA (bcat-1 and pgc-1α) expression. Thus， our findings illustrate that prolonged BCAAs supply duration promotes mice endurance running capacity and skeletal muscle growth， contributing to the advancement of sports nutrition practices.

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A Robust Model Predictive control Method with Output Feedback for Valve-controlled Time-Varying Cylinders System 16th

A Robust Model Predictive Control Method with Output Feedbac...

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16th International Conference on Modelling, Identification and control, ICMIC 2024

作者： Cai, Hui Yan, Hao Shan, Jiefeng Hao, He School of Mechanical Electronic and Control Engineering Beijing Jiaotong University Beijing100044 China Key Laboratory of Vehicle Advanced Manufacturing Measuring and Control Technology Beijing Jiaotong University Ministry of Education Beijing100044 China

ISBN: (纸本)9789819617760

Due to uncertainties in the parameters of the valve-controlled cylinder system and the presence of external disturbances, the force loading performance is compromised, particularly when subjected to extreme conditions involving positional perturbations of the load-bearing system. To tackle this issue, this study presents a robust model predictive control strategy. Initially, a novel linear parameter time-varying system model is developed for precise force loading control of the valve-controlled cylinder, considering both the system's motion characteristics and parameter uncertainties arising from aging and wear. Subsequently, leveraging the proposed robust model predictive controller, we employ linear matrix inequality (LMI) techniques to solve the optimization problem. Through simulation experiments, the effectiveness of the proposed robust control strategy is demonstrated in terms of enhancing force tracking accuracy and ensuring the stability of the force loading system. Additionally, the proposed robust controller exhibits superior performance in attenuating parameter uncertainties and external disturbances. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.

关键词： Predictive control systems

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Electric Vehicle Routing Problem with Capacitated Charging Stations and Dynamic Electricity Prices

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IEEE Internet of Things Journal 2025年第13期12卷 23763-23772页

作者： He, Zhiye Tian, Yuning Miao, Haoyu Yao, Canqi Yang, Zaiyue Shenzhen Key Laboratory of Control Theory and Intelligent Systems Guangdong Provincial Key Laboratory of Fully Actuated System Control Theory and Technology Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities School of System Design and Intelligent Manufacturing Shenzhen518055 China The Hong Kong Polytechnic University Department of Logistics and Maritime Studies Hong Kong Hong Kong

With rapid electrification of transportation systems in recent years, the electric vehicle routing problem (EVRP) has received increasing attention. In order to serve a set of valuable transportation tasks using a fleet of electric vehicles, EVRP intends to jointly determine their routes and the charging schedules, with the aim of optimizing service reward and charging cost under state of charge (SOC) constraints of battery. EVRP is a difficult nonlinear integer program, and due to its intrinsic NP-hardness early EVRP studies often oversimplify the charging process and assume unlimited capacity of charging stations and constant electricity price. The contribution of this paper lies in twofold. First, to better characterize the practical charging process, this paper introduces a new graph model that can take the charging station capacity and dynamic electricity price into full consideration. Second, we design a series of transformation techniques, including reformulation SOC dynamics, Lagrangian relaxation, exact linear programming relaxation, etc, which eventually convert the original EVRP into an approximate linear program. Extensive simulations across 14 instances demonstrate that, the proposed approach is capable of solving large-scale instances over 500 nodes, and is 100 times faster than traditional analytic methods while achieving very close optimality. While comparing with the popular heuristic method ALNS (Adaptive Large Neighborhood Search), our method is several times faster and obtains much better optimality. © 2014 IEEE.

关键词： Charging stations

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Uncover the mystery of interfacial interactions in immiscible composites by spectroscopic microscopy:A case study with W-Cu

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Journal of Materials Science & technology 2022年第31期126卷 106-115页

作者： Zhi Zhao Fawei Tang Chao Hou Xintao Huang Xiaoyan Song Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China

Characterizing immiscible metallic composites with electron microscopy and X-ray spectroscopy is the classic way of obtaining their structural and physical ***,such a combination lacks abil-ity to tell the interfacial interactions at grain *** we demonstrate a novel strategy to un-cover the mystery of interfacial interactions in such systems by spectroscopic *** morpho-logical and spectral data of samples were simultaneously recorded and analyzed,which reveals critical information regarding interfacial electronic *** W-Cu as a model,we experimentally quanti-fied its connectivity and unambiguously identified conditional bonding between W and ***,we chemically reconstructed the specific W-Cu boundary that possessed the strongest interactions and inves-tigated its atomic *** mechanism of W-Cu bonding was proposed and verified by first-principle *** above methodology holds great promise to serve as a universal approach in achieving in-depth understanding of immiscible composites.

关键词： Metal-matrix composites Interface Physical properties Spectroscopic microscopy Interfacial bonding

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Surface modification of tungsten oxide by oxygen vacancies for hydrogen adsorption

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Journal of Materials Science & technology 2022年第22期117卷 23-35页

作者： Q.Zhang F.W.Tang Z.Zhao Z.R.Nie X.Y.Song Faculty of Materials and Manufacturing Key Laboratory of Advanced Functional MaterialsMinistry of Education of ChinaBeijing University of TechnologyBeijing 100124China

A model for describing the adsorption process of hydrogen on surface of tungsten oxide was proposed based on the first-principle calculations. Multiple factors such as type of active surface, adsorption site and distribution of oxygen vacancies were considered to evaluate the hydrogen adsorption capability of tungsten oxide. The adsorption Gibbs free energies, electronic structures and bonding characteristics under various conditions were examined to reveal the influence of oxygen vacancies on the surface. It is found that the capability of hydrogen adsorption of tungsten oxide can be significantly enhanced by adjusting the oxygen vacancy on the outermost layer of certain active surfaces. The modeling predicts that the surface structure stability and gas adsorption ability of tungsten oxide can be simultaneously improved through the formation of W–H bonds. The proposed strategy for moderating surface provides a new approach to obtain excellent gas-sensitive metal oxide materials.

关键词： Metal oxide Gas-sensitive material Surface adsorption Oxygen vacancy First-principles calculation

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Development of High-Speed On-Of Valves and Their Applications

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Chinese Journal of Mechanical Engineering 2022年第4期35卷 21-41页

作者： He Wang Zhen Chen Jiahai Huang Long Quan Bin Zhao Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

With the widespread application of the computer and microelectronic technology in the industry,digitization becomes the inevitable developing trend of the hydraulic *** of the hydraulic components is critical in the digital hydraulic ***-speed on-of valves(HSVs)which convert a train of input pulses into the fast and accurate switching between the on and of states belong to widely used basic digital hydraulic *** some ways,the characteristics of the HSVs determine the performance of the digital hydraulic *** paper discusses the development of HSVs and their ***,the HSVs with innovative structures which is classifed into direct drive valves and pilot operated valves are discussed,with the emphasis on their ***,an overview of HSVs with intelligent materials is presented with considering of the switching frequency and fow ***,the applications of the HSVs are reviewed,including digital hydraulic components with the integration of the HSVs and digital hydraulic systems controlled by the HSVs.

关键词： High-speed on-of valve Digital hydraulic component Switching frequency Flow rate Innovative structure Intelligent material

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