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Carbody sway behaviour of railway vehicles due to track irregularity from rail alternate side wear

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RAILWAY ENGINEERING SCIENCE 2025年第1期33卷 27-42页

作者： Wei, Lai Zeng, Jing Luo, Ren Gan, Feng Gong, Jijun jiang, jun Southwest Jiaotong Univ State Key Lab Rail Transit Vehicle Syst Chengdu 610031 Peoples R China China Railway Mat Operat & Maintenance Technol Co Beijing 10071 Peoples R China

Track irregularity from rail alternate side wear is manifested as uneven rail wear waveforms alternating in the left and right rails with equal intervals, which will cause carbody sway behaviour of railway vehicles and greatly influences the passenger comfort. In this work, the carbody sway behaviour and mechanism due to track irregularity from rail alternate side wear and possible solutions to this issue were studied by the field testing and numerical calculation approaches. First, the carbody sway of an urban rail transit train is introduced with full-scale field tests, through which the rail alternate side wear is characterized and the formatted track irregularity are presented. Then, multibody vehicle dynamic models are developed to reproduce the carbody sway behaviour induced by the track irregularity from the rail alternate side wear. The creep forces acting on the wheel and rail are preliminarily discussed to study the influence of the carbody sway on the wear of the wheel flange and the rail corner. Finally, some potential solutions, e.g. improving the damping ratio of carbody rigid mode and rail grinding, are proposed to relieve this issue. It is concluded that an increased damping ratio of the carbody mode can alleviate the carbody sway and wheel-rail interactions, while properly maintaining track conditions can improve the vehicle performance.

关键词： Carbody sway Track irregularity Rail wear Creep force Carbody mode

Smartphone-assisted electrochemiluminescence imaging test strips towards dual-signal visualized and sensitive monitoring of aflatoxin B1 in corn samples

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Chinese Chemical Letters 2025年第1期36卷 464-468页

作者： Miao-Miao Chen Min-Ling Zhang Xiao Song jun jiang Xiaoqian Tang Qi Zhang Xiuhua Zhang Peiwu Li Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture and Rural AffairsLaboratory of Risk Assessment for Oilseed Products(Wuhan)Quality Inspection and Test Center for Oilseed ProductsOil Crops Research InstituteChinese Academy of Agricultural SciencesWuhan 430062China Food Safety Research Institute Hubei UniversityWuhan 430062China Hubei Hongshan Laboratory Wuhan 430070China Xianghu Laboratory Hangzhou 311231China College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062China

Aflatoxins B1(AFB1)contamination in agro-food holds great threaten to human and animal *** test strips for rapid AFB1 visualized monitoring remains challenged by improvement of sensitivity and matrix interference *** this case,we developed a portable electrochemiluminescence(ECL)imaging test strip with dual-signal outputs for AFB1 quantification in corn ***@SiO_(2)@Au nanospheres were synthesized for bonding with anti-AFB1 antibody and then colorimetrical signal-reported on test line through the capillary flow at ***,ECL imaging signal of the constructed carbon-ink-based working electrode on polyvinyl chloride substrate of strips was exported under an applied potential of 1.25 *** whole ECL test strips not only endowed convenient colorimetric responses but guaranteed quick-witted ECL image distinguishment even at extremely low AFB1 *** detection limit of this ECL imaging-integrated mode was 10-fold lower than that of only colorimetric ***,satisfactory selectivity,reliability and practicability of the as-proposed ECL test strips were *** work offered a promising platform for on-site,accurate and sensitive detection of pollutants in foods.

关键词： Electrochemiluminescence imaging Test strips Nanomaterials Dual-signal outputs Aflatoxin B1 Food safety

Staged dendrite suppression for high safe and stable lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 674-683页

作者： jun jiang Zhenjie Lu Yanwen Ding Shujun Liu Zhijie Qi Tian Tang Yunfan Zhang Zhiyuan Ma Jingwen Sun Liang Xue Wenyao Zhang Pan Xiong Xin Wang junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and TechnologyNanjing 210094JiangsuChina jiangsu Pylon Battery Co.Ltd Yangzhou 211400JiangsuChina

The unavoidable dendrite growth and shuttle effect have long been stranglehold challenges limiting the safety and practicality of lithium-sulfur ***,we propose a dual-action strategy to address the lithium dendrite issue in stages by constructing a multifunctional surface-negatively-charged nanodiamond layer with high ductility and robust puncture resistance on polypropylene (PP) *** uniformly loaded compact negative layer can not only significantly enhance electron transmission efficiency and promote uniform lithium deposition,but also reduce the formation of dendrite during early deposition *** importantly,under the strong puncture stress encountered during the deterioration of lithium dendrite growth under limiting current,the high ductility and robust puncture resistance(145.88 MPa) of as-obtained nanodiamond layer can effectively prevent short circuits caused by unavoidable lithium *** Li||Li symmetrical cells assembled with nanodiamond layer modified PP demonstrated a stable cycle of over 1000 h at 2 mA cm^(-2)with a polarization voltage of only 29.3 ***,the negative charged layer serves as a physical barrier blocking lithium polysulfide ions,effectively mitigating capacity *** improved cells achieved a capacity decay of only 0.042%per cycle after 700 cycles at 3 C,demonstrating effective suppression of dendrite growth and capacity attenuation,showing promising prospect.

关键词： Lithium-sulfur batteries Staged dendrite suppression Shuttle effect Surface-negatively-charged nanodiamond

Insight into the particle shape on the impact of dry granular flow against a rigid barrier: A DEM study

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Journal of Earth Science 2025年

作者： Rui-Xiao Zhan Dong Su Xiang-Sheng Chen Yuan-jun jiang Guo-Ping Lei Jing-Jing Yu Key Laboratory for Resilient Infrastructures of Coastal Cities (MOE)， Shenzhen University College of Civil and Transportation Engineering， Shenzhen University School of Architecture and Urban Planning， Shenzhen University Shenzhen Key Laboratory of Green， Efficient and Intelligent Construction of Underground Metro Station， Shenzhen University Institute of Mountain Hazards and Environment， Chinese Academy of Sciences School of Transportation， Civil Engineering & Architecture， Foshan University

The effect of particle shape on the impact of dry granular flow remains an open area for further investigation. Five distinct particle shapes were examined in this study using discrete element simulations after calibrating the numerical model using a published work. The findings indicated that the particle shape had a significant influence on granular mobility. With negligible variations in normalized kinetic energy between particles of different shapes， the effect of particle shape on the increasing rate of kinetic energy became more obvious. All irregular particle scenarios had longer accumulated particle lengths down the channel than spherical particles. Variations in particle shape led to adjustments in the distribution of impact forces on the barrier. These findings substantially enhance our understanding of the distinctive effects of particle shapes on the impact mechanism of dry granular flow.

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基于2018-2022年国家自然科学基金结题项目分析干细胞研究现状

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中国组织工程研究 2025年第19期29卷 4145-4150页

作者：蒋君张玢中国医学科学院医学信息研究所北京市100005

背景:目前大多数研究从国家自然科学基金资助论文和项目申请角度出发,对干细胞某一方面进行深入分析,或者验证某种评价方法,缺乏对干细胞领域国家自然科学基金已结题项目的全面分析。目的:了解2018-2022年干细胞领域国家自然科学基金结... 详细信息

背景:目前大多数研究从国家自然科学基金资助论文和项目申请角度出发,对干细胞某一方面进行深入分析,或者验证某种评价方法,缺乏对干细胞领域国家自然科学基金已结题项目的全面分析。目的:了解2018-2022年干细胞领域国家自然科学基金结题项目资助情况及研究热点,为后续研究提供参考。

关键词：干细胞国家自然科学基金聚类分析研究热点文献计量学

Carbody sway behaviour of railway vehicles due to track irregularity from rail alternate side wear

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Railway Engineering Science 2025年第01期 27-42页

作者： Lai Wei Jing Zeng Ren Luo Feng Gan Jijun Gong jun jiang State Key Laboratory of Rail Transit Vehicle System Southwest Jiaotong University China Railway Materials Operation and Maintenance Technology Co.Ltd.

Track irregularity from rail alternate side wear is manifested as uneven rail wear waveforms alternating in the left and right rails with equal intervals, which will cause carbody sway behaviour of railway vehicles and greatly influences the passenger comfort. In this work, the carbody sway behaviour and mechanism due to track irregularity from rail alternate side wear and possible solutions to this issue were studied by the field testing and numerical calculation approaches. First, the carbody sway of an urban rail transit train is introduced with full-scale field tests, through which the rail alternate side wear is characterized and the formatted track irregularity are presented. Then, multibody vehicle dynamic models are developed to reproduce the carbody sway behaviour induced by the track irregularity from the rail alternate side wear. The creep forces acting on the wheel and rail are preliminarily discussed to study the influence of the carbody sway on the wear of the wheel flange and the rail corner. Finally, some potential solutions, e.g. improving the damping ratio of carbody rigid mode and rail grinding, are proposed to relieve this issue. It is concluded that an increased damping ratio of the carbody mode can alleviate the carbody sway and wheel–rail interactions, while properly maintaining track conditions can improve the vehicle performance.

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Poorly controlled type Ⅱ diabetes mellitus significantly enhances postoperative chemoresistance in patients with stage Ⅲ colon cancer

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World Journal of Gastroenterology 2025年第3期31卷 29-41页

作者： Ruo-Yu Guan Jia-Wei Wu Zi-Yun Yuan Zhi-Yuan Liu Zi-Zhu Liu Zhi-Cong Xiao Jing-Hui Li Cheng-Zhi Huang jun-jiang Wang Xue-Qing Yao Guangdong Cardiovascular Institute Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesSouthern Medical UniversityGuangzhou 510080Guangdong ProvinceChina Department of Gastrointestinal Surgery Department of General SurgeryGuangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina Department of General Surgery Guangdong Provincial People’s Hospital Ganzhou Hospital(Ganzhou Municipal Hospital)Ganzhou 341000Jiangxi ProvinceChina Shantou University Medical College Shantou 515041Guangdong ProvinceChina School of Medicine South China University of TechnologyGuangzhou 510006Guangdong ProvinceChina Gannan Medical University Ganzhou 341000Jiangxi ProvinceChina

BACKGROUND Type Ⅱ diabetes mellitus(T2DM)has been associated with increased risk of colon cancer(CC)and worse prognosis in patients with *** effects of T2DM on postoperative chemoresistance rate(CRR)and long-term disease-free survival(DFS)and overall survival(OS)in patients with stage Ⅲ CC who receive curative resection remain *** To investigate whether T2DM or glycemic control is associated with worse postoperative survival outcomes in stage Ⅲ *** This retrospective cohort study included 278 patients aged 40-75 years who underwent surgery for stage Ⅲ CC from 2018 to *** on preoperative T2DM history,the patients were categorized into non-DM(n=160)and DM groups(n=118).The latter was further divided into well-controlled(n=73)and poorly controlled(n=45)groups depending on the status of glycemic ***,OS,and CRR were compared between the groups and Cox regression analysis was used to identify risk *** Patients in the DM and non-DM groups demonstrated similar DFS,OS,and CRR(DFS:72.03%vs 78.75%,P=0.178;OS:81.36%vs 83.12%,P=0.638;CRR:14.41%vs 7.5%,P=0.063).Poorly controlled DM was associated with a significantly worse prognosis and higher CRR than well-controlled DM(DFS:62.22%vs 78.07%,P=0.021;OS:71.11%vs 87.67%,P=0.011;CRR:24.40%vs 8.22%,P=0.015).High preoperative fasting plasma glucose[DFS:Hazard ratio(HR)=2.684,P<0.001;OS:HR=2.105,P=0.019;CRR:HR=2.214,P=0.005]and glycosylated hemoglobin levels(DFS:HR=2.344,P=0.006;OS:HR=2.119,P=0.021;CRR:HR=2.449,P=0.009)indicated significantly poor prognosis and high CRR,while T2DM history did not(DFS:HR=1.178,P=0.327;OS:HR=0.933,P=0.739;CRR:HR=0.997,P=0.581).CONCLUSION Increased preoperative fasting plasma glucose and glycosylated hemoglobin levels,but not T2DM history,were identified as risk factors associated with poor postoperative outcomes and high CRR in patients with stage Ⅲ CC.

关键词： Colon cancer Chemoresistance Diabetes mellitus Prognosis TypeⅡdiabetes mellitus

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钼酸铵工业废气废水综合治理技术开发与应用

山西化工 2025年第1期45卷 253-255页

作者：姜隽太原市生态环境监控中心山西太原030021

随着工业生产的快速发展,钼酸铵作为一种重要的无机化工产品,其生产过程中产生的废气和废水对环境造成了严重污染。为了实现可持续发展,保护生态环境,降低工业生产对环境的影响,开发和应用钼酸铵工业废气和废水的综合治理技术显得尤为... 详细信息

随着工业生产的快速发展,钼酸铵作为一种重要的无机化工产品,其生产过程中产生的废气和废水对环境造成了严重污染。为了实现可持续发展,保护生态环境,降低工业生产对环境的影响,开发和应用钼酸铵工业废气和废水的综合治理技术显得尤为重要。旨在探讨钼酸铵工业废气和废水综合治理技术的开发与应用,通过对案例的研究,为钼酸铵工业及相关行业的废气、废水治理提供了有益的参考和借鉴。

关键词：钼酸铵工业废气废水综合治理技术开发

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纤维素基水凝胶研究进展

高分子通报 2025年第1期38卷 41-57页

作者：宁良允蒋军张代晖南京林业大学材料科学与工程学院南京210037 中国林业科学研究院林产化学工业研究所国家林业和草原局林产化学工程重点实验室江苏省生物质能源与材料重点实验室南京210042

纤维素基水凝胶是一种基于天然高分子纤维素的三维网络亲水性聚合物,具有良好的生物相容性、高保水性、生物可降解性等特性。随着绿色低碳化发展理念的提出,可持续的天然聚合物材料已成为研究热点。纤维素基水凝胶作为天然聚合物的代表... 详细信息

纤维素基水凝胶是一种基于天然高分子纤维素的三维网络亲水性聚合物,具有良好的生物相容性、高保水性、生物可降解性等特性。随着绿色低碳化发展理念的提出,可持续的天然聚合物材料已成为研究热点。纤维素基水凝胶作为天然聚合物的代表,在软材料领域备受关注。本文总结了纤维素基水凝胶的交联制备方法,主要有物理交联和化学交联。据此,介绍了纤维素基复合水凝胶在生物医药、柔性电子、食品工业、环境保护和生物工程等5个领域的功能化应用。随着研究不断深入,纤维素基水凝胶将在未来更多领域具备广阔的应用前景。

关键词：纤维素水凝胶物理交联化学交联功能化应用

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