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International Conference on Artificial Intelligence and Autonomous transportation, AIAT 2024

作者： Du, Mingyang Li, Wei Su, Shaodan Li, Chenyang Zhu, Xiuwen Zhang, Hongjia School of Automotive Engineering Shandong Jiaotong University Jinan250357 China China National Heavy Duty Truck Group Corp Jinan250014 China Key Laboratory of Transportation Industry for Transport Vehicle Detection Diagnosis and Maintenance Technology Jinan250357 China

ISBN: (纸本)9789819639564

To address the issues of low detection accuracy for small and occluded objects from a roadside perspective and limited computational resources at the roadside, a lightweight roadside object detection algorithm based on YOLOv5s is proposed. In the Backbone, a lightweight DC-C3 module with a hybrid attention mechanism is introduced along with the CA spatial attention mechanism. This approach enhances the ability to capture spatial relationships and local features in the image, effectively addressing the problems of occluded and small objects. The Neck layer structure is pruned, and the CARAFE upsampling operator and GSConv module are introduced. Additionally, a lightweight DWG module is proposed to replace the C3 module. These modifications reduce the computational complexity and parameter count of the Neck while maintaining good model performance. Finally, a lightweight and efficient decoupled prediction head is proposed to separately handle the classification and localization tasks of the detection layer, improving detection accuracy and accelerating model convergence. On the open-source roadside DAIR-V2X-I dataset, the improved D-YOLOv5 algorithm model reduces the model size by 12.5%, and mAP(0.5) and mAP(0.95) are improved by 1.2% and 1.1%, respectively. In complex roadside object detection tasks, the proposed detection algorithm demonstrates superior performance. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Object detection

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Stealthy False Data Injection Attacks in Multi-Channel Vehicular Communication: White-Box and Gray-Box Strategies

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IEEE Transactions on Vehicular technology 2025年

作者： Xu, Chongcong Zheng, Fangfang Guo, Ge Southwest Jiaotong University School of Transportation and Logistics Chengdu611756 China Southwest Jiaotong University National Engineering Laboratory of Integrated Transportation Big Data Application Technology National United Engineering Laboratory of Integrated and Intelligent Transportation Chengdu611756 China Northeastern University State Key Laboratory of Synthetical Automation for Process Industries Shenyang110819 China Northeastern University at Qinhuangdao School of Control Engineering Qinhuangdao066004 China

Understanding the vulnerabilities of vehicular networks from an attacker's perspective is crucial for identifying stealthy false data injection (FDI) attacks and developing robust defense methods. This paper investigates stealthy FDI attacks in multi-channel vehicular communication systems. We construct a multi-source state estimation system using a sequential Kalman filter to integrate and estimate redundant state information transmitted by preceding vehicles across multiple channels. To enhance the system's resilience against FDI attacks, we incorporate a Sage-Husa adaptive filter and a chi-squared detector, which dynamically estimate and detect channel noise based on estimation errors. Within this framework, we utilize real-time state information and channel transmission residual to determine the probability of an attack window occurring. The attack process is divided into three phases, during which critical noise disturbances are introduced to create attack windows, allowing the attack to progressively align with the target state. Based on this analysis, we develop an optimization model for attack generation with complete channel information (AG-with-CCI) to facilitate a white-box attack. Additionally, acknowledging that attackers may not have access to real-time information from all channels, we analyze the iterative equations of state estimation errors and residuals to establish the conditions under which stealthy FDI attacks can be successfully executed, enabling the attack generation with attacked channel information (AG-with-ACI) to achieve a gray-box attack. Numerical simulations demonstrate that both attack methods can evade current detection mechanisms and achieve their intended objectives. © 2025 IEEE.

关键词： Adaptive filtering

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Microhardness and microstructural evolution of helical cylindrical pinion mold cavity during plastic torsion forming

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Journal of Materials Research and technology 2025年 36卷 8254-8261页

作者： Likuan Zhu Zhiqiang Huang Zhiwen Zhou Jianxun Lu Tao Cheng Yong Tang Xiaoyu Wu Bo Wu Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering College of Mechatronics and Control Engineering Shenzhen University Shenzhen 518060 China School of Mechanical and Automotive Engineering South China University of Technology Guangzhou Guangdong 510640 China Guangdong University Engineering Technology Research Center for Precision Components of Intelligent Terminal of Transportation Tools College of Urban Transportation and Logistics Shenzhen Technology University Shenzhen 518118 China

Plastic helical cylindrical pinions are widely used, and the injection mold cavity is crucial for their manufacturing process. However, it is quite difficult to machine the helical gear cavity by electrical discharge machining (EDM) with spiral discharge, and the quality control issue has long troubled manufacturers. Therefore, the authors proposed a novel method for manufacturing helical gear cavities by plastic torsion forming. This method involves initially machining a straight-tooth cavity using wire electrical discharge machining (WEDM) and then plastically twisting it to manufacture a helical gear cavity, which could significantly reduce the manufacturing difficulty. This paper investigates the evolution of microhardness and microstructure during the plastic torsion forming process of helical gear cavities. A relationship model is established between the helix angle at the pitch circle of the helical gear cavity and the microhardness, as well as the average grain size. The results show that the hardness increases linearly as the helix angle increases, while the average grain size decreases linearly. Specifically, at smaller helix angles, the grain size exhibits a larger fluctuation range, which gradually diminishes as the helix angle increases, leading to improved accuracy of the model predictions. Observations of grain size and dislocations in the torsion samples reveal that strengthening under severe plastic deformation is primarily attributed to grain refinement, while under minor plastic deformation, it is more closely related to changes in internal dislocations. During this process, a strong <111> texture and a secondary <001> texture are formed, contributing to the enhancement of microhardness.

关键词： Helical gear cavity Plastic deformation Torsion Hardness

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Structural stability of granular materials analyzed using image processing and redundancy function

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Particuology 2025年 102卷 152-164页

作者： Jichen Zhong Lin Gao Junxing Zheng Dong Wang Junbo Xi Peng Cao Jinsong Song Zhaochao Li School of Civil and Hydraulic Engineering Huazhong University of Science and Technology Wuhan 430074 China Faculty of Architecture Civil and Transportation Engineering Beijing University of Technology Beijing 100084 China School of Transportation and Logistics Dalian University of Technology Dalian 116024 China School of Civil Engineering Hunan University of Technology Zhuzhou 412007 China Key Laboratory of Safety Control of Bridge Engineering Ministry of Education (Changsha University of Science and Technology) Changsha 410114 China

The study of macroscopic discrete granular materials holds significance in hydraulic engineering, geotechnical engineering, as well as road and bridge engineering. Its foundational scientific exploration bears profound theoretical implications and is of pivotal practical value to engineering endeavors. Within the realm of engineering construction, issues such as dam breakages, earth-rock dam damage, and geological disasters involving loose particles pose substantial threats to the safety of both national livelihoods and property. Thus, delving into the examination of the structural stability of granular materials at the mesoscopic scale becomes an imperative pursuit. In this study, the topological structure of granular materials is identified and segmented based on image processing techniques, and the relationship between the compressive capacity of polygonal structures and the number of polygonal sides is studied. The redundancy function is defined to evaluate the structural stability of granular materials. In addition, the definition of structure tensor is introduced, and redundancy and structure tensor are applied to the study of biaxial compression of shale materials. The research results contribute to improving engineering safety and have guiding merits for the research and application of granular materials. Future work could focus on extending these methods to other types of granular materials and exploring their behavior under different loading conditions.

关键词： Consolidation

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Study on the Construction of "One-Bill Coverage" Transport Service System for China-Laos Railway Multimodal Transport 11th

Study on the Construction of "One-Bill Coverage" Transport S...

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11th International Conference on Traffic and transportation Studies, ICTTS 2024

作者： Du, Xinyi Zhang, Yaqin Wang, Li School of Traffic and Transportation Beijing Jiaotong University Beijing100044 China Institute of Computing Technology China Academy of Railway Sciences Corporation Limited Beijing100081 China Beijing Engineering Research Center of Urban Traffic Information Intelligent Sensing andService Technologies Beijing100044 China Key Laboratory of Railway Industry for Operational Active Safety Assurance and Risk Prevention and Control Beijing Jiaotong University Beijing100044 China

ISBN: (纸本)9789819796397

The "one-bill coverage" of China-Laos railway multimodal transport is an effective way to promote the growth of bilateral trade between China and Laos railways, and it is an inevitable requirement for the construction of a modern comprehensive transport system. In order to enhance the efficiency and economic benefits of cargo transport on China-Laos Railway, this paper combines the current situation of freight transport on China-Laos Railway and divides the life cycle of "one-bill coverage" of China-Laos Railway multimodal transport into five phases: order submission, domestic consolidation, cross-border transport, foreign evacuation and order signing, etc., and builds a "one-bill coverage" covering all the links, such as loading, transport, transshipment, warehousing, connecting, and customs clearance. This paper can provide a reference for the development of "one-bill coverage" transport service of China-Laos Railway multimodal transport. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Multimodal transportation

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A Passenger-oriented Train Scheduling Optimization Method for Tourism Rail Transit System

A Passenger-oriented Train Scheduling Optimization Method fo...

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IEEE International Conference on Industrial technology (ICIT)

作者： Guangcai Zhang Jianrui Miao Sihui Long Jing Cai Yunpeng Wu Hongyun Li School of Transportation Engineering Kunming University of Science and Technology Kunming China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China

ISBN: (数字)9798331521950

ISBN: (纸本)9798331521967

This paper presents a train scheduling optimization method for tourism rail transit at the tactical level, aimed at enhancing the effectiveness of operational planning in the context of dynamic changes in passenger demand. The proposed method considers passenger reservations and the synchronization of train services, establishing a model that minimizes the total transfer waiting time for passengers. This model provides an integrated optimization scheme for the stop plan and train timetable, ensuring that all passengers are transported. Realistic situations, such as train capacity limitations and passenger waiting time restrictions, are taken into account. We utilize the CPLEX solver to obtain the optimal solution for the proposed model. Experimental results indicate that, compared to the fixed operation plan that does not consider demand, our method improves both the quality of schedule formulation and the level of operational service.

关键词： Rails Schedules Job shop scheduling Optimization models Dynamic scheduling Synchronization Capacity planning

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A Passenger-oriented Train Scheduling Optimization Method for Tourism Rail Transit System

A Passenger-oriented Train Scheduling Optimization Method fo...

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26th International Conference on Industrial technology, ICIT 2025

作者： Zhang, Guangcai Miao, Jianrui Long, Sihui Cai, Jing Wu, Yunpeng Li, Hongyun School of Transportation Engineering Kunming University of Science and Technology Kunming China Beijing Jiaotong University State Key Laboratory of Rail Traffic Control and Safety Beijing China

ISBN: (纸本)9798331521950

关键词： passenger-oriented tourism rail transit train schedule transfer coordination

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Bending behaviour of raw coal gangue concrete-filled steel tubes

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Structures 2025年 76卷

作者： Wu, Xiangjiao Zhao, Hui Wang, Rui Wang, Yunhe Cui, Hongzhi Chen, Man-Tai College of Civil Engineering Taiyuan University of Technology Taiyuan030024 China Shanxi Key Laboratory of Civil Engineering Disaster Prevention and Control Taiyuan University of Technology Taiyuan030024 China College of Civil and Transportation Engineering Shenzhen University Shenzhen China State Key Laboratory of Ocean Engineering Shanghai Jiao Tong University Shanghai200240 China

This paper presents an experimental and numerical study on raw coal gangue concrete-filled steel tube (RCGCFST) beams. Six RCGCFST beams were tested to evaluate the effects of raw coal gangue (RCG) replacement level, steel ratio and water-to-cement ratio under bending. The failure modes, moment versus mid-span deflection curves, and moment versus longitudinal strain responses were obtained. Results revealed that all beams exhibited overall bending deformation, with RCG content having a limited effect on the ultimate moment of RCGCFST beams. Finite element (FE) models were subsequently developed and validated against the test results. Parametric studies were conducted to investigate the influence of RCG replacement levels, steel ratios, steel yield strengths, and concrete cubic compressive strengths on the ultimate moment. Finally, six design methods of GB 50936, EC 4, AISC 360, BS5400, T/CECS 625 and ISO 16521 were employed to assess their applicability for RCGCFST specimens. In general, EC 4 provided an accurate prediction for the ultimate moment of RCGCFSTs. © 2025 Institution of Structural Engineers

关键词： Compressive strength

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Wave-pulse mixing coupled with powdered activated carbon enhances AnMBR in treating low temperature municipal wastewater and recovering dissolved CH4

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Water Research 2025年 282卷 123667页

作者： Zhao, Peiyi Li, Ziyue Chen, Ai Liu, Yongze Qu, Fangshu Qu, Dan Liu, Xinying Beijing Key Laboratory for Source Control Technology of Water Pollution Engineering Research Center for Water Pollution Source Control and Eco-remediation College of Environmental Science and Engineering Beijing Forestry University Beijing 100083 China Guangzhou University School of Civil and Transportation Engineering Guangzhou510006 China

The anaerobic membrane bioreactor (AnMBR) technology is increasingly applied in the treatment of municipal wastewater. However, its application in cold region still faces many challenges including low anaerobic digestion efficiency and high concentrations of dissolved methane (D-CH4). In this study, powdered activated carbon (PAC) was incorporated into AnMBR operated under wave-pulse mixing mode (P-W-AnMBR) to enhance the operational performance under low temperature condition. As temperature decreased and organic loading rate (OLR) elevated, the COD removal efficiency in the P-W-AnMBR maintained at a high level (93.4 %∼95.8 %) and exhibited favorable stability. The P-W-AnMBR could effectively prevent volatile fatty acid (VFA) accumulation with the lowest VFA concentrations of 22.0 ± 3.9 mg·L-1. Correspondingly, the methane yield in P-W-AnMBR system reached high as 0.22 ± 0.04 L·g-1 which was 1.5 times of that in conventional biogas-recirculation mixing AnMBR (B-AnMBR), while the D-CH4 supersaturation was only ∼1.05, showing a 52.4 % decrease compared to B-AnMBR. According to higher electron transfer system activity and Cyt-C content, electron transfer process was enhanced in P-W-AnMBR, accounting for superior organics conversion to methane. Through a high average KLa as 4.50 h⁻¹, the D-CH4 readily transfer to the gas phase, thereby reducing the concentration of D-CH4 as well as increasing the proportion of gaseous methane. Energy analysis showed generation of methane energy could be augmented in P-W-AnMBR as OLR was elevated at 15 °C, thereby significantly reducing the net energy consumption. The combination of wave-pulse mixing and conductive PAC within AnMBR provides insights into low temperature resource recovery from municipal wastewater. © 2025 Elsevier Ltd

关键词： Biodegradation

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A Hierarchical controller for Connected Truck Platoon: Analysis and Verification

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IEEE Transactions on Intelligent transportation Systems 2025年

作者： Li, Yongfu Fan, Junhong Huang, Longwang Huang, Gang Hua, Wei Wu, Wei Yu, Shuyou Shi, Shuming Gao, Xinbo Chongqing University of Posts and Telecommunications Key Laboratory of Intelligent Air-Ground Cooperative Control for Universities in Chongqing School of Automation Chongqing400065 China Zhejiang University School of Electrical Engineering Hangzhou310027 China Zhejiang Lab Hangzhou311121 China Chongqing Jiaotong University Chongqing Key Laboratory of Intelligent Integrated and Multidimensional Transportation System Chongqing400074 China Changsha University of Science and Technology School of Traffic and Transportation Engineering Changsha410114 China Jilin University Department of Control Science and Engineering Changchun130012 China Jilin University Transportation College Changchun130012 China

This paper proposes a novel hierarchical controller for connected truck platoons. To this end, the predecessor following topology is used to characterize the communication connectivity between connected trucks. Then, a longitudinal efficient controller consisting of upper-level and lower-level controllers is proposed. In particular, the upper-level controller is designed based on the kinematic model to handle the car-following interactions between connected trucks and delays in communication and input. The lower-level controller comprises a feedforward and a feedback control law. The feedforward control law converts the desired acceleration from the upper-level controller into the vehicle throttle or braking pressure using the inverse dynamic model, while the feedback control law compensates for the control error caused by unknown vehicle parameters. In addition, in the linear region, the internal stability is analyzed based on the second-order kinematic model using s-domain analysis and linearization method, respectively. Then, the string stability is proved. The influence of parameters on the stability performance is extensively discussed using the stability diagram. Finally, the feasibility of the proposed controller is verified via co-simulations in PreScan and TruckSim, in terms of acceleration, velocity, and spacing error profiles. © 2025 IEEE.

关键词： Feedback control

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