检索结果-内蒙古大学图书馆

11th Frontier Academic Forum of Electrical Engineering, FAFEE 2024

作者： Ma, Pengyu Li, Benliang Zou, Jun State Key Lab of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing100084 China State Power Economic Research Institute Beijing102200 China

ISBN: (纸本)9789819787791

With the development of cities, underground tunnels are more and more widely used, and the reinforced concrete in their walls can be used as the natural grounding body of the tunnels. However, underground tunnels have curved structures, multiple cross-sections and deep-buried structures, and the electrical conductivity of the concrete is different from that of the soil, etc., and the traditional analytical method has limitations in calculating the grounding resistance of the tunnels in these cases. In order to satisfy the needs of practical engineering, this paper adopts a numerical method based on the MoM numerical method to analyze the grounding system of underground tunnels with complex geometries and to calculate the grounding resistance of reinforced concrete systems in underground tunnels. In order to assess the difference between the analytical solution and the exact solution, the article introduces a correction factor to measure the ratio between the two. simulations are carried out for real cases, and the results show that the accuracy of the analytical solution can be improved by introducing the correction factor. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： correction factor grounding resistance numerical method Underground tunnels

来源：评论

学校读者我要写书评

暂无评论

Integrated Motion control of Interaction Safety, Stability and Path-tracking for Front-and-Rear-Independent-Drive Electric Vehicle

引用

IEEE Transactions on Transportation Electrification 2025年

作者： Zeng, X.H. Duan, C.S. Song, D.F. Qian, Q.F. Yang, D.P. Zhang, X.M. Jilin University State Key Laboratory of Automotive Simulation and Control Changchun130022 China Automobile and Traffic Engineering Jiangsu University Jiangsu China

Under two vehicle interaction scenarios, the uncertain motion states of traffic participants pose significant challenges to the safety of autonomous vehicles (AVs), and AVs are susceptible to instability with emergency avoidance constraint. To address this issue, an integrated motion control of interaction safety, stability and path-tracking is proposed for front-and-rear-independent-drive electric vehicle (FRIDEV). First, a control oriented longitudinal-lateral coupled dynamic model is established. Then, a variable step model predictive control is designed to solve multi-objective optimization problems, which mainly include two parts: (i) adaptive adjustment of stability weight by an improved phase plane method, and (ii) adding an interactive safety constraint to motion control by backward reachability analysis. Finally, simulation results show that the proposed controller can effectively utilize the longitudinal and lateral tire forces and achieve an balance between stability and tracking accuracy, and reduce collision risk in the interactive scenario with milder control actions. Moreover, the hardware-in-the-loop test demonstrates that the proposed controller is effective in the real-time environment. © 2015 IEEE.

关键词： Predictive control systems

来源：评论

学校读者我要写书评

暂无评论

Micro-structure evolution, precipitation behavior and strengthening mechanism of Ni-Cr-Mo system steel fabricated via laser powder bed fusion and subsequent quenching control

引用

Chinese Journal of Aeronautics 2025年第3期38卷 560-592页

作者： Qing WANG Deyin KONG Shihui ZHOU Xingran LI Zhihui ZHANG The Key Laboratory of Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130025China Weihai Institute for Bionic Jilin UniversityWeihai 264402China State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130025China

High-performance 24CrNiMo steel was fabricated using Laser Powder Bed Fusion (LPBF). Subsequent quenching treatment was applied and the influence of quenching temperatures on micro-structure evolution and properties was systematically characterised and analysed. The micro-structure of the as-built steel consisted of two parts. The first part comprised martensite with twins combined with ω-Fe nano-particles, and the second part consisted of lower bainite in the molten pool, as well as upper bainite, granular bainite and tempered martensite in the heat-affected zone. With the quenching temperatures varying from 800℃ to 950℃, the micro-structure gradually transformed from acicular ferrite + martensite to tempered martensite +θ-Fe3C carbides, and the grain size exhibited noticeable growth. Moreover, quenching treatments could eliminate the anisotropy and inhomogeneity of the micro-structure. The rod-shaped nanosized η-Fe2C and θ-Fe3C precipitates were clearly observed, which were converted from ω-Fe and distributed at multiple angles in the lath. The size and number of nano-precipitates, triggered by the high self-tempering degree of martensite, gradually increased. The relationships among grain size, the twins, dislocation density and nano-precipitation and the dramatically improved performance of quenched samples were analysed using strengthening mechanisms. After quenching at 850℃, the as-built 24CrNiMo steel attained ultra-high mechanical properties including hardness, Ultimate Tensile Strength (UTS), Elongation (El) and impact energy with values of 480.9 HV_(1), 1611.4 MPa, 9.8% and 42.8 J, respectively. Meanwhile, both the wear and thermal fatigue resistance increased by approximately 40%. This study demonstrated that LPBF-fabricated 24CrNiMo steel, with matching good performances, can be achieved using a subsequent one-step quenching process.

关键词： Laser powder bed fusion 24CrNIMo steel Quenching control Micro-structure evolution Precipitate Comprehensive properties Strengthening mechanisms

来源：评论

学校读者我要写书评

暂无评论

Research on Quantitative Safety Risk Assessment Methods at Vehicle controllability Level

引用

IEEE Access 2025年 13卷 82527-82539页

作者： He, Lei Li, Zichong Yang, Xuezhu Zhou, Yuanle Qu, Zikun Ren, Zhiqiang Jilin University State Key Laboratory of Automotive Simulation and Control Jilin Changchun130025 China China First Automobile Works Group Corporation Ltd Jilin Changchun130000 China

In recent years, advancements in electrification, intelligent connectivity, and autonomous driving have made functional safety, particularly the vehicle-level controllability, a critical research focus. Although the ISO 26262 standard provides a systematic framework for automotive functional safety, challenges remain in accurately defining and quantifying controllability levels. In this paper, we analyze the influence of potential faults—such as unintended torque and loss of regen-erative braking force—on vehicle controllability under various operating conditions. A database of vehicle attitude data and corresponding controllability levels is established through real-vehicle tests. Feature screening is then performed to identify the most relevant attributes that significantly affect controllability. Based on this database, a controllability model is developed using the Support Vector Machine (SVM) method, which can effectively predict controllability levels. The model is applied in multiple simulation scenarios to assess vehicle controllability under different conditions. Additionally, the safety boundaries of motor torque are determined at varying speeds, providing insights into critical thresholds beyond which the vehicle's con-trollability may be compromised. This work presents a novel approach for the quantitative analysis of vehicle controllability and safety risks, offering a reliable tool for evaluating functional safety in modern vehicles. © 2013 IEEE.

关键词： ISO Standards

来源：评论

学校读者我要写书评

暂无评论

Publisher Erratum: Design of energy-saving driving strategy based on proximal policy optimization considering urban transport information(control Theory and Technology, (2025), 23, (74–90), 10.1007/s11768-024-00233-7)

引用

control Theory and Technology 2025年

作者： Liu, Qifang Sun, Dazhen Chen, Haowen Li, Dongzi Wang, Ping Department of Control Science and Engineering Jilin University Jilin Changchun130022 China State Key Laboratory of Automotive Simulation and Control Jilin University Jilin Changchun130022 China

In this article, the received, revised and accepted dates are missing. Please find the correct history dates here: Received: 15 October 2023. Revised: 20 March 2024. Accepted: 6 May 2024. © The Author(s), under exclusive licence to South China University of Technology and Academy of Mathematics and Systems Science, Chinese Academy of Sciences 2025.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Intelligent vehicle decision-making strategy integrating spatiotemporal features at roundabout

引用

Expert Systems with Applications 2025年 273卷

作者： Ma, Wenxiao Wu, Jian Sun, Bohua Leng, Xinlun Miao, Weiwei Gao, Zhenhai Li, Wenjin State Key Laboratory of Automotive Simulation and Control Jilin University Chang chun130022 China R&D Center Chassis Department China FAW Group Corporation Chang chun130022 China

To overcome the problems of weak driving safety and low traffic efficiency of intelligent vehicles in roundabout scenarios, and to improve the autonomous decision-making ability of intelligent systems. In this paper, we propose an intelligent vehicle Decision-Making Strategy based on SpatioTemporal graph neural Networks, namely DMS-STNet. Using end-to-end deep learning methods based on the historical information of intelligent vehicles and surrounding vehicles, output the action sequence of future driving behavior of intelligent vehicles. Specifically, a spatiotemporal graph is used to model the driving environment of vehicles, and a graph convolutional neural network is used to explore the spatial interaction relationship between intelligent vehicles and environmental vehicles. Next, based on the time convolutional network, learn the temporal characteristics of intelligent vehicles. Further integrate the complex spatiotemporal interaction relationship between intelligent vehicles and environmental vehicles through a gated fusion network. Moreover, a multi-layer perceptron is used to map the fused tensor into a sequence of driving behavior actions. In addition, experimental data collection and software in the loop testing verification were conducted on the Carla simulator platform. The research results indicate that the model proposed in this paper outperforms the comparative models in terms of prediction accuracy, safety, and traffic efficiency, fully leveraging the autonomous decision-making performance advantages of intelligent vehicles. © 2025 Elsevier Ltd

关键词： Convolutional neural networks

来源：评论

学校读者我要写书评

暂无评论

A cooperative energy management strategy based on region-based traffic grade prediction

引用

Applied Energy 2025年 391卷

作者： Hou, Zhuoran Chu, Liang Hu, Jincheng Jiang, Jingjing Yang, Jun Zhang, Yuanjian State Key Laboratory of Automotive Simulation and Control Jilin University No. 5988 Renmin Street Nanguan District Changchun130022 China Department of Aeronautical and Automotive Engineering Loughborough University LeicestershireLE11 3TU United Kingdom

The progression of the Internet of Vehicles (IoVs) has cultivated a comprehensive information environment, laying the groundwork for vehicle-environment adaptive control. Region-based traffic condition prediction offers valuable insights into overall traffic trends, aiding urban applications and vehicle-environment cooperation. In this study, an adaptive energy management strategy based on region-based traffic grade prediction (TGP-EMS) is proposed for plug-in hybrid electric vehicles (PHEVs) based on IoVs, strengthening the adaptability via accurately obtaining future region-based traffic conditions. Firstly, traffic data collected from volunteering vehicles are processed to generate representative traffic graphs and the traffic conditions are separated into several grades with distinct traffic attributes. Secondly, a differentiable pooling is integrated into a hierarchical deep learning framework to establish a region-based traffic prediction model termed Graph Pool. Thirdly, an optimal explicit solving method based on an instantaneous optimization algorithm is proposed and successfully applied to energy management. Moreover, the robustness of the introduced explicit solving algorithm is optimized based on the beetle antennae search (BAS) algorithm. simulation results, accompanied by hardware-in-the-loop (HIL) tests, suggest that the introduced Graph Pool effectively captures spatial features across the entire traffic network, ensuring accuracy and consistency in predicting traffic conditions. Moreover, the TGP-EMS adeptly adjusts power distribution based on these predictions, showing an improvement of roughly 13.5 % compared to conventional rule-based energy management strategies. © 2025

关键词： Plug-in hybrid vehicles

来源：评论

学校读者我要写书评

暂无评论

Cutting force modeling in high-speed machining of selective laser melted Ti6Al4V alloys based on a modified constitutive model considering thermally activated effect

引用

Science China(Technological Sciences) 2025年第3期68卷 138-155页

作者： Dejian LIU Chenbing NI Youqiang WANG Lida ZHU Zhongpeng ZHENG Wei LU Naixin ZHANG Xingbao HUANG School of Mechanical and Automotive Engineering Qingdao University of TechnologyQingdao266520China Key Lab of Industrial Fluid Energy Conservation and Pollution Control Ministry of EducationQingdao266520China School of Mechanical Engineering and Automation Northeastern UniversityShenyang110819China School of Mechanical Engineering Tsinghua UniversityBeijing100084China Shandong Zhongheng Jingxin Carbon Fiber Technology Development Co. LtdDezhou251100China State Key Laboratory of Bridge Safety and Resilience College of Civil EngineeringHunan UniversityChangsha410082China

The thermally activated effect can produce a vital influence on the mechanical property and cutting force of metal materials in the machining *** insight can be gained into the action criteria of the thermally activated effect on the cutting force,which provides a solid basis of the research of material performance and *** this study,a cutting force model of selective laser melted(SLMed)Ti6Al4V alloy is proposed by introducing the modified constitutive model with thermally activated effects and the analytical model of the deformation zone into the cutting force *** anisotropic properties of SLMed Ti6Al4V alloy under different scanning strategies(0°,67.5°,and 90°)are explored by combining with the cutting force model,constitutive model and analytical model of deformation zone(primary deformation and tool-chip contact area).The action of thermally activated effects on the cutting force,primary deformation and tool-chip contact zone is also researched in *** experiments and predictions of SLMed Ti6Al4V alloy under different scanning strategies have been implemented to reveal the effectiveness of this new *** comparison results indicate that the proposed milling force model can effectively predict milling force and reflect well on the anisotropy of SLMed Ti6Al4V *** addition,this proposed force model can well analyze the action mechanism of the thermally activated effect on the milling force of SLMed Ti6Al4V alloy,which is significantly essential for the machining mechanism research in terms of a microscopic perspective.

关键词： cutting force model modified constitutive model thermally activated effect SLMed Ti6Al4V alloy laser scanning strategies anisotropic properties

来源：评论

学校读者我要写书评

暂无评论

Unique electronic regulation in bimetallic MOF for efficient electrochemical synthesis of H2O2 at 500 mA cm−2

引用

Nano Energy 2025年 141卷

作者： Yu, Yang Jiao, Dongxu Yi, Lingya Zhao, Dantong Zou, Jiajia Cui, Xiaoqiang Hu, Weihua School of Materials and Energy Chongqing Key Laboratory of Battery Materials and Technology Southwest University Chongqing400715 China State Key Laboratory of Automotive Simulation and Control School of Materials Science and Engineering Key Laboratory of Automobile Materials of MOE Jilin University Changchun130012 China

Metal-organic frameworks (MOFs) have attracted significant attention in the field of electrocatalytic synthesis of H2O2 through 2-electron oxygen reduction reaction (ORR). However, the active sites responsible for catalysis have remained unknown, and practical application of MOFs in this area is yet to be demonstrated. In this study, a CoZn bimetallic MOF catalyst (BIM-Co2Zn8-500, BIM refers to benzimidazole) based on imidazole was synthesized and exhibited exceptional activity, selectivity and stability for the electrocatalytic synthesis of H2O2. The catalyst achieved a high H2O2 yield of 21.77 mol g−1 h−1 and a Faradaic Efficiency (FE) of 92.5 % at a current density of 500 mA cm−2 using a gas diffusion electrode, thus showing great potential for practical applications. Through joint spectroscopic characterizations and density function theory (DFT) calculations, a unique electronic regulation mechanism was elucidated in this catalyst. It was found that the catalytic sites were the coordinately unsaturated Zn atoms, whose electronic structure was regulated by the nearby Co/Zn nodes. This regulation enabled precise adjustment of the binding free energy of the *OOH intermediate, thereby enhancing the 2-electron ORR activity. © 2025

关键词： Electrolytic reduction

来源：评论

学校读者我要写书评

暂无评论

Multi-objective crashworthiness optimization of novel functionally-graded variable section double-hexagonal crash box

引用

Zhendong yu Chongji/Journal of Vibration and Shock 2025年第11期44卷 50-60and69页

作者： Xiong, Feng Zeng, Shupeng Wang, Zhanfei Zhang, Shuai Wang, Dengfeng Xu, Hongyu Joint International Research Laboratory of Intelligent Manufacturing & Control of Key Parts for Energy-efficient & New Energy Vehicles Ministry of Education Chongqing University of Technology Chongqing400054 China State Key Laboratory of Intelligent Green Vehicle and Mobility Tsinghua University Beijing100084 China School of Vehicle and Traffic Engineering Henan University of Science and Technology Luoyang471000 China State Key Laboratory of Automotive Simulation and Control Jilin University Changchun130012 China

In order to synergistically improve the crashworthiness safety and lightweight level of the oar body, a novel functionally-graded variable section double-hexagonal crash box was designed and proposed. The substructure at its lower end with regulär shape, namely functionally-graded variable section double-hexagonal tube (FS-DHT), was extracted as research subject, on which parametric geometric modeling was conducted. The finite element model of FS-DHT under axial crushing was established and verified by experiments. A comparative study concerning crashworthiness and energy absorption characteristics under axial crushing was conducted among FS-DHT, traditional straight DHT (S-DHT) and conical DHT (C-DHT). The influence of the tube wall thickness, the circumcircle radius differences at upper and lower end face of inner and outer hexagonal tubes, and the gradient exponent on the crashworthiness and energy absorption characteristics of FS-DHT under axial crushing was explored. A multi-objective optimization was carried out on FS-DHT by combining the optimal Latin hypercube sampling, response surface Surrogate model and the second-generation non-dominating sorting genetic algorithm, then verified. The finite element model of " bumper-crash box" assembly under axial crushingwas further established to verify the improvement effect of FS-DHT optimization on the crashworthiness of functionally-graded variable section double-hexagonal crash box. The results show that after optimization of FS-DHT, its specific energy absorption (SEA) increases by 21. 61% while its initial peak crushing force (IPCF) decreases by 13.40%, which meanwhile promotes the energy absorption (EA) of functionally-graded variable section double-hexagonal crash box to increase by 17. 14% and the corresponding IPCF at the bumper to decrease by 6. 46%, indicating a good multi-objective collaborative crashworthiness optimization is obtained. An effective novel structure and new approach are provided for synerg

关键词： Multiobjective optimization

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：