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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 164-170页

作者： WU Min CAO Kailei XIAO Weirong YU Zetai CAO Jierong DING Qingjun LI Jinhui china railway co.struction co.poration Harbour and Channel Engineering Bureau group co. LTDZhuhai 519000China co.-struction Headquarters of Zhoushan Liuheng Bridge Phase II Project Zhoushan 316000China china railway co.struction Bridge En-gineering Bureau group co. LTDTianjin 300000China State Key Laboratory of Silicate Material for Architecture(Wuhan University of Technology) Wuhan 430070China co.lege of Materials Science and Engineering Wuhan Textile UniversityWuhan 430200China

The paper presents experimental investigation results of crack pattern change in cement pastes caused by external sulfate attack(ESA).To visualize the formation and development of cracks in cement pastes under ESA,an X-ray co.puted tomography(X-ray CT)was used,i e,the tomography system of Zeiss Xradia 510 *** results indicate that X-CT can monitor the development process and distribution characteristics of the internal cracks of cement pastes under ESA with attack *** addition,the C3A co.tent in the cement significantly affects the damage mode of cement paste specimens during sulfate *** damage of ordinary Portland cement(OPC)pastes subjected to sulfate attack with high C3A co.tent are severe,while the damage of sulfate resistant Portland cement(SRPC)pastes is much smaller than that of OPC ***,a quadratic function describes the co.relation between the crack volume fraction and development depth for two cement pastes immermed in sulfate solution.

关键词： co.crete external sulfate attack damage evolution situ X-ray co.puted tomography

SensFL:Privacy-Preserving Vertical Federated Learning with Sensitive Regularization

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co.puter Modeling in Engineering & Sciences 2025年第1期142卷 385-404页

作者： Chongzhen Zhang Zhichen Liu Xiangrui Xu Fuqiang Hu Jiao Dai Baigen Cai Wei Wang School of Automation and Intelligence Beijing Jiaotong UniversityBeijing100044China Shuohuang railway Development co. Ltd.National Energy GroupCangzhou062350China Beijing Key Laboratory of Security and Privacy in Intelligent Transportation School of Computer Science and TechnologyBeijing Jiaotong UniversityBeijing100044China

In the realm of Intelligent railway Transportation Systems,effective multi-party co.laboration is crucial due to co.cerns over privacy and data *** Federated Learning(VFL)has emerged as a promising approach to facilitate such co.laboration,allowing diverse entities to co.lectively enhance machine learning models without the need to share sensitive training ***,existing works have highlighted VFL’s susceptibility to privacy inference attacks,where an honest but curious server co.ld potentially reco.struct a client’s raw data from embeddings uploaded by the *** vulnerability poses a significant threat to VFL-based intelligent railway transportation *** this paper,we introduce SensFL,a novel privacy-enhancing method to against privacy inference attacks in ***,SensFL integrates regularization of the sensitivity of embeddings to the original data into the model training process,effectively limiting the information co.tained in shared *** reducing the sensitivity of embeddings to the original data,SensFL can effectively resist reverse privacy attacks and prevent the reco.struction of the original data from the *** experiments were co.ducted on four distinct datasets and three different models to demonstrate the efficacy of *** results show that SensFL can effectively mitigate privacy inference attacks while maintaining the accuracy of the primary learning *** results undersco.e SensFL’s potential to advance privacy protection technologies within VFL-based intelligent railway systems,addressing critical security co.cerns in co.laborative learning environments.

关键词： Vertical federated learning privacy defenses

Experimental Observing Damage Evolution in Cement Pastes Exposed to External Sulfate Attack by in situ X-ray co.puted Tomography

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期 164-170页

作者：吴敏 CAO Kailei XIAO Weirong YU Zetai 曹杰荣 DING Qingjun LI Jinhui china railway co.struction co.poration Harbour and Channel Engineering Bureau group co. LTD co.struction Headquarters of Zhoushan Liuheng Bridge Phase Ⅱ Project china railway co.struction Bridge Engineering Bureau group co. LTD State Key Laboratory of Silicate Material for Architecture (Wuhan University of Technology) co.lege of Materials Science and Engineering Wuhan Textile University

The paper presents experimental investigation results of crack pattern change in cement pastes caused by external sulfate attack （ESA）.To visualize the formation and development of cracks in cement pastes under ESA,an X-ray co.puted tomography （X-ray CT） was used,i e,the tomography system of Zeiss Xradia 510 *** results indicate that X-CT can monitor the development process and distribution characteristics of the internal cracks of cement pastes under ESA with attack *** addition,the C3A co.tent in the cement significantly affects the damage mode of cement paste specimens during sulfate *** damage of ordinary Portland cement （OPC） pastes subjected to sulfate attack with high C3A co.tent are severe,while the damage of sulfate resistant Portland cement （SRPC） pastes is much smaller than that of OPC ***,a quadratic function describes the co.relation between the crack volume fraction and development depth for two cement pastes immermed in sulfate solution.

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A Novel Vibration-Based Self-Adapting Method to Acquire Real-Time Following Distance for Virtually co.pled Trains

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IEEE/CAA Journal of Automatica Sinica 2025年第1期 27-39页

作者： Qinglai Zhang Jianmin Gao Qing Wu Qinglie He Libin Tie Wanming Zhai Shengyang Zhu State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong University IEEE Centre for railway Engineering Central Queensland University National Energy railway Equipment co. LTDNational Energy Group

Virtual co.pling(VC) is an emerging technology for addressing the shortage of rail transportation capacity. As a crucial enabling technology, the VC-specific acquisition of train information, especially train following distance(TFD), is *** this paper, a novel method is proposed to acquire real-time TFD by analyzing the vibration response of the front and following trains, during which only onboard accelerometers and speedometers are required. In co.trast to the traditional arts of train positioning, this method targets a relative position between two adjacent trains in VC operation, rather than the global positions of the trains. For this purpose, an adaptive system co.taining three strategies is designed to co.e with possible adverse factors in train operation. A vehicle dynamics simulation of a heavy-haul railway is implemented for the evaluation of feasibility and performance. Furthermore, a validation is co.ducted using a set of data measured from in-service Chinese high-speed trains. The results indicate the method achieves satisfactory estimation accuracy using both simulated and actual data. It has favorable adaptability to various uncertainties possibly enco.ntered in train operation. Additionally, the method is preliminarily proven to adapt to different loco.otive types and even different rail transportation modes. In general, such a method with good performance, low-co.t, and easy implementation is promising to apply.

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The Fuxing: The china Standard EMU

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Engineering 2020年第3期6卷 227-233页

作者： Yanhui Qi Li Zhou china State railway group co. Ltd.Beijing 100844China china Academy of railway Sciences co. Ltd.Beijing 100081China

*** overview Since the first high-speed railway(HSR)intercity line was built between Beijing and Tianjin in 2008,china’s HSRs have developed *** a short span of ten years,successive HSRs have entered operation between Zhengzhou and Xi’an,Beijing and Shanghai,Beijing and Guangzhou,Lanzhou and Urumqi,and around Hainan *** the end of 2018,the HSR route length in china exceeded 29000 km,acco.nting for over two thirds of the world’s total.

关键词： successive Tianjin railway

Micro-structure and Macro-performance:Surface Layer Evolution of co.crete under Long-term Exposure in Harsh Plateau Climate

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Journal of Wuhan University of Technology(Materials Science) 2024年第6期39卷 1496-1506页

作者： CHEN Xin CUI Anqi ZHENG Haitao YANG Wencui HUANG Xin GE Yong LI Lihui School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China Zhengzhou Engineering co. Ltd of China Railway Seventh GroupZhengzhou 450052China Research Institute of Highway Ministry of Transport Beijing 100088China

We co.ducted a series tests on surface layers of plateau co.crete at the ages of 180 and 540 days,including the most superficial cement paste,the 5 mm thick surface mortar,and the 50 mm thick surface *** and nitrogen absorption porosimetry on cement past,mercury intrusion porosimetry on mortar,and microhardness test on interface transition zone between mortar and co.rse aggregate were co.ducted to evaluate the hydration degree and characterize the ***,tests for the rebound strength,abrasion resistance,and chloride ion impenetrability of co.crete were co.ducted to assess the *** experimental results show that,affected by the harsh plateau climate,outward surfaces have lower hydration degrees and worse pore structure than inward *** the hydration of co.crete surface is ongoing after the age of 180 days,both the micro-structure and the macro-performance are co.tinuously *** the long-term,either the orientation or the depth towards surface does not significantly affect co.crete *** carbonation brings positive effects on mechanical properties but negative effects on the ***,standard test result of chloride ion impenetrability is found significantly affected by the atmospheric *** a same batch of co.crete,charge passed in plateau regions is obviously lower than that in co.mon regions.

关键词： co.crete pore structure interface transition zone mechanical property chloride ion impenetrability plateau

Depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 335-345页

作者： Feng Zhang Chenyang Zhang Linlin Wu Wei Sun Hongliang Zhang Jianhua Chen Yong Pei Songjiang Li Engineering Research Center of Ministry of Education for Carbon Emission Reduction in Metal Resource Exploitation and Utilization Hunan International Joint Research Center for Efficient and Clean Utilization of Critical Metal Mineral ResourcesSchool of Minerals Processing and BioengineeringCentral South UniversityChangsha 410083China State Key Laboratory of Mineral Processing Beijing General Research Institute of Mining&MetallurgyBeijing 100160China Hunan Provincial Key Laboratory of Micro&Nano Materials Interfaces Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Resources Environment and MaterialsGuangxi UniversityNanning 530004China Department of Chemistry Xiangtan UniversityXiangtan 411105China china railway Resource group co.Ltd Beijing 102300China

The depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite still lacked in-depth ***,the depression mechanism of sulfite ions on sphalerite and Pb^(2+)activated sphalerite in the flotation separation of galena from sphalerite was further systematically investigated with experiments and density functional theory(DFT)*** X-ray photoelectric spectrosco.y(XPS)results,DFT calculation results,and frontier molecular orbital analysis indicated that sulfite ions were difficult to be adsorbed on sphalerite surface,suggesting that sulfite ions achieved depression effects on sphalerite through other non-adsorption ***,the oxygen co.tent in the surface of sphalerite treated with sulfite ions in creased,which enhanced the hydrophilicity of the sphalerite and further increased the difference in hydrophilicity between sphalerite and ***,sulfite ions were chelated with lead ions to form PbSO_(3)in *** hydrophilic PbSO_(3)was more easily adsorbed on sphalerite than *** interaction between sulfite ions and lead ions co.ld effectively inhibit the activation of *** addition the UV spectrum showed that after adding sulfite ions,the peak of perxanthate in the sphalerite treated xanthate solution was significantly stronger than that in the galena with xanthate solution,indicating that xanthate interacted more readily with sulfite ions and oxygen mo lecules within the sphalerite system,leading to the formation of ***,sulfite ions hardly depressed the flotation of ga lena and co.ld promote the flotation of galena to some *** study deepened the understanding of the depression mechanism o sulfite ions on sphalerite and Pb^(2+)activated sphalerite.

关键词： sphalerite galena sulfite ion density functional theory depression mechanism

Dynamic behavior of bridge-erecting machine subjected to moving mass suspended by wire ropes

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Applied Mathematics and Mechanics(English Edition) 2016年第6期37卷 741-748页

作者： Shaopu YANG Xueqian FANG Jianchao ZHANG Dujuan WANG School of Mechanical Engineering Shijiazhuang Tiedao University china railway Engineering Equipment group co. Ltd.

The dynamic behavior of a bridge-erecting machine, carrying a moving mass suspended by a wire rope, is investigated. The bridge-erecting machine is modelled by a simply supported uniform beam, and a massless equivalent ＂spring-damper＂ system with an effective spring co.stant and an effective damping co.fficient is used to model the moving mass suspended by the wire rope. The suddenly applied load is represented by a unitary Dirac Delta function. With the expansion method, a simple closed-form solution for the equation of motion with the replaced spring-damper-mass system is formulated. The characters of the rope are included in the derivation of the differential equation of motion for the system. The numerical examples show that the effects of the damping co.fficient and the spring co.stant of the rope on the deflection have significant variations with the loading frequency. The effects of the damping co.fficient and the spring co.stant under different beam lengths are also examined. The obtained results validate the presented approach, and provide significant references in the design process of bridgeerecting machines.

关键词： bridge-erecting machine wire rope dynamic behavior equivalent "spring-damper" system

Optimization and Design of Cloud-Edge-End co.laboration co.puting for Autonomous Robot co.trol Using 5G and Beyond

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Journal of Beijing Institute of Technology 2022年第5期31卷 454-463页

作者： Hao Wang china railway Siyuan Survey and Design group co. Ltd.Wuhan 430063China

Robots have important applications in industrial production, transportation, environmental monitoring and other fields, and multi-robot co.laboration is a research hotspot in recent years. Multi-robot autonomous co.laborative tasks are limited by co.munication, and there are problems such as poor resource allocation balance, slow response of the system to dynamic changes in the environment, and limited co.laborative operation capabilities. The co.bination of 5G and beyond co.munication and edge co.puting can effectively reduce the transmission delay of task offloading and improve task processing efficiency. First, this paper designs a robot autonomous co.laborative co.puting architecture based on 5G and beyond and mobile edge co.puting(MEC).Then, the robot co.perative co.puting optimization problem is studied acco.ding to the task characteristics of the robot swarm. Then, a reinforcement learning task offloading scheme based on Qlearning is further proposed, so that the overall energy co.sumption and delay of the robot cluster can be minimized. Finally, simulation experiments demonstrate that the method has significant performance advantages.

关键词： robot co.laboration mobile edge co.puting(MEC) 5G and beyond network task offloading resource allocation

Pumpability of Manufactured Sand Self-co.pacting co.crete

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1382-1390页

作者： LI Huajian HUANG Fali TU Haifeng SUN Deyi WANG Zhen YI Zhonglai YANG Zhiqiang XIE Yongjiang railway Engineering Research Institute China Academy of Railway Science Corporation LimitedBeijing 100081China School of Civil Engineering Beijing Jiaotong UniversityBeijing 100044China china railway Engineering Design and co.sulting group co. Ltd Beijing 100055China

By the addition of superplasticizer and air entraining agent,manufactured sand selfco.pacting co.crete(MS SCC)with slump flow varying from 500 to 700 mm and air co.tent varying from 2.0%to 9.0%were prepared and the pumpability of MS SCC was studied by a sliding pipe rheometer(Sliper).Acco.ding to the Kaplan’s model,the initial pump pressure and the pump resistance of MS SCC were ***,rheological properties including the yield stress and the plastic visco.ity of MS SCC were measured by a *** experimental results show that the increase of slump flow co.tributes to a higher pumpability and a proper air co.tent,i e,6%is beneficial for the pumpability of MS *** to the existence of stone powder and stronger angularity of MS,the initial pump pressure of MS SCC is only about 60%-88%that of river sand(RS)SCC with the same slump flow and air co.tent,indicating that MS SCC possesses a higher pumpability than RS SCC.

关键词： manufactured sand self-co.pacting co.crete pumpability sliding pipe rheometer rheology