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International Conference on Artificial Intelligence and Advanced Manufacturing (AIAM)

作者： Xinhong Hei Yi Chen Lei Zhu Qin Zhao Long Pan School of Computer Science and Engineering University of Technology State Key Laboratory of Rail Transit Engineering Informatization(FSDI) Xi’an China Shenzhen Tencent Computer System Co. Ltd Shenzhen China

The rail transit Codes contain a large number of schemaless data and text, which are difficult to extract and process. Knowledge Graph can handle large-scale schemaless data, thus it is used to effectively store and manipulate relevant information of rail transit Codes. As an essential component, Chinese word segmentation is a difficult problem for building the Knowledge Graph of rail transit Codes. In this paper, we propose a bi-directional maximum matching algorithm and some rules based Chinese word segmentation method, for design Codes of rail transit. In the proposed method, the item information, attribute values and Code names are first segmented by preprocessing. Then, the bidirectional matching algorithm with double dictionary is used to generate the preliminary results. Finally, the preliminary results are further optimized with rules to generate the final results. With testing some design Codes, the experimental results show that the proposed method can improve the accuracy and efficiency of Chinese word segmentation in this field, and it can deal with the update of noun entity library.

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Structural feature enhanced transformer for fine-grained image recognition

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Pattern Recognition 2025年

作者： Ying Yu Wei Wei Cairong Zhao Jin Qian Enhong Chen State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure East China Jiaotong University Nanchang 330013 Jiangxi China School of Information and Software Engineering East China Jiaotong University Nanchang 330013 Jiangxi China School of Computer Science and Technology Tongji University ShangHai 200092 ShangHai China School of Data Science University of Science and Technology of China Hefei 230026 AnHui China

Existing fine-grained image recognition (FGIR) models mainly rely on high-level semantic features to extract discriminative information, ignoring the potential role of the overall structural information of objects and the structural relationships between key parts. To address this issue, we propose the Structural Feature Enhancement Transformer (SFETrans). SFETrans consists of a visual transformer backbone network responsible for extracting complex semantic features. Additionally, it includes a structural modeling (SM) branch and an amplitude component exchange (ACE) module, both dedicated to enhancing the learning of structural features. The SM branch actively models the structural relationships between key parts of objects and extracts corresponding structural features, while the ACE module guides the model to learn structural information in the phase spectrum by introducing implicit constraints during training. By synergizing the backbone network and the two modules, SFETrans exhibits competitive performance on four benchmark datasets and outperforms other comparison methods in terms of computational efficiency.

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Study of in situ stress inversion of deeply incised valleys considering the river evolution process

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Scientific Reports 2025年第1期15卷 1-19页

作者： Wang, Xianliang Zhao, Changgui Cheng, Fenyuan Ma, Zhiwei Qi, Wei Dou, Yinling Lan, Hao Zhang, Jianhai He, Benguo Peng, Lingying Du, Wei Sichuan Provincial Engineering Research Center of Rail Transit Lines Smart Operation and Maintenance Chengdu Vocational & Technical College of Industry Chengdu 610218 China Sichuan Metallurgical Design and Inspection Group Testing Corporation Limited Chengdu 610052 China Mianyang Engineering Section China Railway Chengdu Group Co. Ltd Mianyang 621000 China State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resources and Hydropower Sichuan University Chengdu 610065 China Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern University Shenyang 110819 China

The study of the in situ stress field is significant for the stability of large underground caverns near deep V-shaped valleys. Tectonic movements, gravity and river erosion have a great influence on the formation of the modern stress field. With the existing inversion method of the stress field in river valleys, it is assumed that the current stress field was formed in an ancient time. The inversion results are derived by first calculating the influence of tectonic movements and gravity on the ancient stress field, followed by simulating modern river erosion through multistep excavation. Thus, the influence of tectonic movements on the process of river erosion is ignored. To solve this problem, an optimized inversion method considering tectonic movements during different periods of river erosion (ORE) is proposed based on multistep excavation and a genetic algorithm (GA). In this method, unit extrusion, shear movements and gravity are carried out at different periods of valley evolution to simulate the effects of tectonic movements at different geological times on the current geostress field. The method is applied to the ground stress inversion of the Shuangjiangkou hydropower station, and the relative errors between the inversion results and the field-measured data are less than 30%. By comparing the results with those of the multiple regression method and multistep excavation method, it is found that the unloading phenomenon of slopes and the stress concentration phenomenon below the riverbed can be simulated with accuracy. This indicates that the proposed method can provide a reference for the design and construction of engineering work in similar locations. Finally, by analyzing the ground stress field of the underground main powerhouse in Shuangjiangkou, it is found that high-stress-induced disasters such as rock bursts and large deformations may occur in the area. © The Author(s) 2025.

关键词： Deep V-shaped river Valley Genetic algorithm In situ stress inversion Multistep excavation River erosion

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A Guide for Human Walking Model and Control——Insights from Mechanical Property Analysis of Human Walking

A Guide for Human Walking Model and Control——Insights from...

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第32届中国控制与决策会议

作者： Guangrong Chen Bowen Hou Sheng Guo Junzheng Wang Robotics Research Center Beijing Jiaotong University Beijing Engineering and Technology Research Center of Rail Transit Line Safety and Disaster Prevention State Key Laboratory of Intelligent Control and Decision of Complex Systems School of AutomationBeijing Institute of Technology

This paper aims to establish the simplest human walking model and provide a guide for controlling biped ***,a human motion capture system was utilized to sample the motion data of human walking and a representative subject was ***,one of the simplest human walking model was set *** mechanical property analysis of human walking was done based on the established walking model via ***,the feasibility and effectiveness of proposed walking model were validated by numerical ***,the intrinsical relationships among human walking,biped walking model and control were discussed to provide a guide and insight for controlling biped robots.

关键词： Human Walking Model Biped Robots Leg Stiffness Legged Locomotion Model and Control

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Dynamic Balance and Trajectory Tracking Control of Quadruped Robots Based on Virtual Model Control

Dynamic Balance and Trajectory Tracking Control of Quadruped...

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第三十九届中国控制会议

As for a motion control framework of robots, virtual model control（VMC） can use virtual components to create virtual forces/torques. Actually, the virtual forces/torques are generated by joint actuators when the virtual components interact between robots and environments. In this paper, a virtual model control is proposed to do the dynamic balance control of quadruped robots in trot gait. In each leg, virtual model control includes swing phase control of robots and stance phase counterparts. In whole body, based on the forces/torques distribution method between two stance legs, virtual model control is mainly about the attitude control containing roll, pitch and yaw. Then, an intuitive approach of velocity control is employed for the locomotion of quadruped robots. Based on the velocity planning and control, a trajectory tracking control approach is investigated by considering four factors: terrain complexity index, curvature radius of given trajectory, distance to terminal, and maximum velocity of quadruped robots. Finally, the effectiveness of proposed controllers is validated by co-simulations.

关键词： Virtual model control Dynamic balance control Trajectory tracking control Quadruped robots

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Timetable Optimization Model with Considering Regenerative Braking Power for Urban rail

Timetable Optimization Model with Considering Regenerative B...

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Chinese Automation Congress (CAC)

作者： Juanjuan Cai Jing Xun Xiao Xiao Xiaoqing Liu Xiangyu Ji School of Electronic and Information Engineering Beijing Jiaotong University Beijing China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China Transit Communication and Operation Control National Engineering Laboratory for Urban Rail Beijing China Beijing Metro Operation Administration Corporation Limited Beijing China Academic of Railway Sciences (Beijing) Engineering Consult Co. Ltd Beijing China

ISBN: (数字)9781728176871

ISBN: (纸本)9781728176888

Along with China's economic growth and the urbanization is sped up. Energy conservation in urban rail transit (URT) has attracted widespread attention. Timely use of regenerative energy (URE) is an imperative way to save electricity. Regenerative braking, also known as feedback braking, is a braking technology used on electric vehicles to convert kinetic energy of train into electrical energy when the train is braking. Other trains could use these regenerative energy by accelerating in a cooperative way. In order to maximize the URE, this paper proposes a new approach that uses the train's electric power to gauge the available energy, and analyzes the operation process of a train to optimize the time when the train left the station. First, we defined 4 operating Modes of energy utilization, and codified an integer programming model. Second, we used a branch and bound algorithm to figure out the excellent result. Finally, we used the data on the operation of the Yanfang Line, Beijing Metro assessed the model. The simulation results illustrated that compared with the original timetable, the method can significantly improve the URE by 77.5%.

关键词： Optimization Acceleration rails Energy consumption Traction power supplies Safety Mathematical model

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Non-limit Active Earth Pressure under Different Retaining Wall Displacement Modes Based on Discrete Element Simulation

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Science Technology and engineering 2024年第11期24卷 4658-4668页

作者： Zhang, Fan Yin, Ming Sun, Feng Feng, Guo-Hui Sun, Jia-Zheng Liu, Guan-Shui Lin, Gang Li, Qiang Xu, Chang-Jie Zhejiang Geological and Mineral Exploration Institute Co. Ltd Hangzhou310013 China Reconnaissance and Qiantang River Administration Design Institute Co. Ltd. of Zhejiang Province Hangzhou310016 China China Railway Siyuan Survey and Design Group Co. Ltd. Wuhan430061 China Department of Civil Engineering Hangzhou City University Hangzhou310015 China Research Center of Coastal and Urban Geotechnical Engineering Zhejiang University Hangzhou310058 China Zhejiang Hanghai Intercity railway Co. Ltd. Jiaxing314000 China State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure East China Jiaotong University Nanchang330013 China

Aiming at the problem of non-limit active earth pressure of sand during active displacement of rigid retaining wall, the active failure process of sand under rotating about the base (RB) mode, rotating about the top (RT) mode and translation (T) mode was simulated and analyzed by using PFC2D. The results show that there are differences in the mobilization of internal friction angle and the soil-wall interface friction angle in soil under different displacement modes. During the active displacement of the retaining wall, the soil failure in RB mode starts from the top of the wall and develops to the foot of the wall. Only the area near the back of the wall appears the principal stress deflection in the soil wedge, and the mobilized value of the internal friction angle in the soil wedge can reach the limit value. In RT mode, the soil failure starts from the foot of the wall to the soil surface along the back of the wall and the sliding surface. The deflection angle of the principal stress in the middle and upper part of the soil wedge behind the wall is large, forming a large principal stress arch, which corresponds to the reduction of the mobilized value of the friction angle in this area relative to the initial internal friction angle. In T mode, the soil failure develops from the top of the wall to the foot of the wall along the back of the wall and from the foot of the wall to the surface of the soil along the slip surface. A small principal stress arch appears in the soil wedge behind the wall, and the mobilized value of the internal friction angle increases from the initial internal friction angle, but it does not reach the limit value. © 2024 Beijing Kexue Jishu yu Gongcheng Zazhishe. All rights reserved.

关键词： Internal friction

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A human error quantitative analysis of the railway ATO system based upon improved CREAM

A human error quantitative analysis of the railway ATO syste...

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International Conference on Intelligent Transportation

作者： Jianqiang Jin Kaicheng Li Lei Yuan Guodong Wei National Engineering Laboratory for Urban Rail Transit Communication and Operation Control Beijing Jiaotong University Beijing China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China

ISBN: (纸本)9781538670255

Automatic Train Operation (ATO) system, whose function is to drive the train automatically, can improve the efficiency of operation. However, the driver's errors often leads to the failure of the ATO system in actual operation. So it is significant to evaluate driver's human reliability for improving system effectiveness. Considering the scenario-based characteristics of railway operation, this paper proposes a three-layer Human Reliability Analysis (HRA) model based on Bayesian network, Event Tree Analysis(ETA) to optimize Cognitive Reliability and Error Analysis Method (CREAM). Special Bayesian networks are used to transform expert experience into driver's Human Error Probability (HEP) value in the ATO system of the railway, rather than the probability interval. The model is used to calculate the HEP of the scene of manual train door and platform door linkage. The overall idea of the model is consistent with the CREAM method, and the application results are also conform to the conclusion of the basic CREAM . Therefore, the improved HRA model can provide reliable HEP of the scenario for the driver in ATO system of the railway.

关键词： Task analysis Reliability rail transportation Bayes methods Analytical models Power generation Error analysis

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Safety Test Case Generation of Train-ground Transmission Function for CTCS Based on Fault Models

Safety Test Case Generation of Train-ground Transmission Fun...

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International Conference on Intelligent Transportation

作者： Yujie Sun Kaicheng Li Lei Yuan Guodong Wei National Engineering Laboratory for Urban Rail Transit Communication and Operation Control Beijing Jiaotong University Beijing China State Key Laboratory of Rail Traffic Control and Safety Beijing Jiaotong University Beijing China

ISBN: (纸本)9781538670255

Fault-based safety tests are used to verify the safety functions of Chinese Train Control System (CTCS). The complex failure modes of the system bring some challenges to generate test cases including possible failure modes for specific safety functions. In this paper, we propose a method of generating safety test cases for train control systems based on fault models. The train-ground transmission function of train control systems is selected as the research object. The failure modes which may occur in the process of train-ground information transmission are obtained by using Failure Mode and Effect Analysis (FMEA). Then, the extended UML sequence diagram is used to describe the information interaction process of the train operation scenes in which failure modes are injected. The fault extended hybrid automata models of the system are established and verified. The safety test cases containing the faults are generated by an improved test case generation tool for hybrid system. Finally, the application of this method is illustrated by combining the wireless message's loss with RBCs' handover scene. The result shows that this method can generate safety test cases including faults, which are able to provide guidance for safety tests of CTCS.

关键词： Safety Control systems Automata Unified modeling language Hybrid power systems Tools Mathematical model

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Identification of preferential groundwater run-off belts through correlation between spring discharge and precipitation in Baiquan spring basin

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IOP Conference Series: Earth and Environmental Science 2021年第2期804卷

作者： Yafei Yu Longcang Shu Yanan Dong Xin Wang College of Hydrology and Water Resources Hohai University Nanjing China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing Jinan Rail Transit Group Co. Ltd Jinan China

Baiquan spring group is a typical sign of the existence of preferential groundwater run-off belts in Baiquan spring basin. The spring flow is mainly affected by the supply of karst water, and atmospheric precipitation is the most important factor affecting the supply of karst water. By using Pearson correlation coefficient method, the number of months with the maximum Pearson coefficient between the spring discharge and the precipitation at the monthly scale of each hydrological station in the water spring area is analyzed, which is called the best precipitation delay. According to the optimal precipitation lag time, the Pearson correlation coefficients of spring discharge and precipitation of each hydrological station in 2006-2013 are calculated on the three months scale and the daily scale respectively, and the hydrological stations closely related to spring discharge are found out. The results show that: the best precipitation lag time of each station is 6 months; the precipitation change of Wangsheren station, Suncun station and Wenzu station is consistent with the spring flow process, which has a relatively large impact on the spring flow. The 3 stations may be located in the preferential groundwater run-off belts bearing medium in Baiquan spring basin.

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