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Earth Pressure of Retaining Structure Induced by Subgrade under Rainfall

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Open Journal of Civil Engineering 2016年第3期6卷 495-501页

作者： yuwei zhang Junzhi Lin Jun Zhao College of River and Ocean Engineering Chongqing Jiaotong University Chongqing China

This article selects the retaining wall as the research object, introducing the rainfall infiltration model, considering the infiltration of rainwater into the groundwater recharge, analysizing the variation of earth pressure in the subgrade retaining wall. On this occasion, the back of retaining wall produces stable seepage water and compares with the non drainage water body. The results show that, with the infiltration of rainwater into the groundwater recharge, the greater the active earth pressure under the condition of rainfall appears, more quickly the active earth pressure of the retaining wall with the drainage body increases. The matrix suction of unsaturated soils, which is infiltrated into soil of subgrade, has a positive effect on the shear strength of the earth pressure.

关键词： Subgrade Engineering Matrix Suction Limit Equilibrium Method Active Earth Pressure Retaining Wall Rainfall Infiltration

Train post‑derailment behaviours and containment methods:a review

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Railway Engineering Science 2024年第1期32卷 59-80页

作者： Zhao Tang yuwei Hu Shuangbu Wang Liang Ling Jianjun zhang Kaiyun Wang State Key Laboratory of Traction Power Southwest Jiaotong UniversityChengdu 610031China Institute of Smart City and Intelligent Transportation Southwest Jiaotong UniversityChengdu 610031China National Centre for Computer Animation Bournemouth UniversityDorsetUK

Railway accidents,particularly serious derailments,can lead to catastrophic ***,it is essential to prevent derailment escalation to reduce the likelihood of severe *** post-derailment behaviours and containment methods play a critical role in preventing derailment escalation and providing passive safety protection and accident prevention in the event of a ***,despite the increasing attention on this field from academia and industry in recent years,there is a lack of systematic exploration and summarization of emerging applications and containment methods in train post-derailment *** this reason,this paper presents a comprehensive review of existing studies on train post-derailment behaviours,encompassing various topics such as post-derailment contact-impact models,dynamic modelling and simulation techniques,and the primary factors influencing post-derailment ***,this review introduces and elucidates substitute guidance mechanisms(SGMs),which serve as railway-specific passive safety protection and accident prevention *** various types of SGMs are depicted,and their ongoing developments and applications are explored in *** review additionally points out several unresolved challenges including the adverse effects of SGMs,and proposes future research directions to advance the theoretical understanding and practical application of train post-derailment behaviours and containment *** review seeks to be a valuable reference for railway industry professionals in preventing catastrophic derailment consequences through post-derailment containment methods.

关键词： Railway passive safety Railway accident prevention Post-derailment behaviours Substitute guidance mechanisms(SGMs) Contact-impact model

Boron promoted Fe^(3+)/peracetic acid process for sulfamethazine degradation:Efficiency,role of boron,and identification of the reactive species

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Journal of Environmental Sciences 2024年第1期135卷 72-85页

作者： Yanhong zhang Guangbing Liu Yuzhu Xue Lichun Fu Yawei Qian Minhui Hou Xiang Li Chen Ling Ying zhang yuwei Pan Jiangsu Provincial Key Laboratory of Environmental Engineering Jiangsu Provincial Academy of Environmental ScienceNanjing 210036China College of Biology and the Environment Nanjing Forestry UniversityNanjing 210037China School of Iron and Steel Soochow UniversitySuzhou 215000China School of the Environment Nanjing UniversityNanjing 210023China SUMEC Complete Equipment&Engineering Co. LTD.Nanjing 211500China Key Laboratory of Pollution Process and Environmental Criteria Ministry of EducationCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China School of Environment Key Laboratory for Yellow River and Huai River Water Environmental and Pollution ControlMinistry of EducationHenan Key Laboratory for Environmental Pollution ControlHenan Normal UniversityXinxiang 453007China

In this work,boron(B)was used to promote Fe^(3+)/peracetic acid(Fe^(3+)/PAA)for the degradation of sulfamethazine(SMT).An SMT degradation efficiency of 9.1%was observed in the Fe^(3+)/PAA system over 60 min,which was significantly increased to 99.3%in the B/Fe^(3+)/PAA system over 10 *** B/Fe^(3+)/PAA process also exhibited superior resistance to natural substances,excellent adaptability to different harmful substances,and good removal of antibiotics in natural fresh water *** mechanism of action of boron for Fe^(3+)reduction was determined using scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),Fourier transform infrared(FT-IR)spectroscopy,density functional theory(DFT)calculations,and electrochemical *** dominant role of^(·)OH was confirmed using quenching experiments,electron spin resonance(EPR)spectroscopy,and quantitative *** radicals(R-O^(·))and Fe(IV)also significantly contribute to the removal of *** calculations on the reaction between Fe^(2+)and the PAA were conducted to further determine the contribution from ^(·)OH,R-O^(·),and Fe(IV)from the perspective of thermodynamics and the reaction *** boron dosages,Fe^(3+)dosages,and initial pH values were also investigated in the B/Fe^(3+)/PAA system to study their effect of SMT removal and the production of the reactive ***(IV)production determined the k_(R-O·+Fe(IV))value suggesting that Fe(IV)may play a more important role than R-O^(·).A comparison of the results with other processes has also proved that the procedure described in this study(B/Fe^(3+)/PAA)is an effective method for the degradation of antibiotics.

关键词： Boron Peracetic acid Sulfamethazine DFT Reactive species

Whole lifecycle observation of single‐spore germinated Streptomyces using a nanogap‐stabilized microfluidic chip

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mLife 2022年第3期1卷 341-349页

作者： Dongwei Chen Mengyue Nie Wei Tang yuwei zhang Jian Wang Ying Lan Yihua Chen Wenbin Du State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijingChina College of Life Sciences University of the Chinese Academy of SciencesBeijingChina Savaid Medical School University of the Chinese Academy of SciencesBeijingChina

Streptomyces is a model bacterium to study multicellular differentiation and the major reservoir for antibiotics ***,the cellular‐level lifecycle of Streptomyces has not been well studied due to its complexity and lack of research tools that can mimic their natural *** this study,we developed a simple microfluidic chip for the cultivation and observation of the entire lifecycle of Streptomyces development from the single‐cell *** chip consists of channels for loading samples and supplying nutrients,microwell arrays for the seeding and growth of single spores,and air chambers beside the microwells that facilitate the development of aerial hyphae and spores.A unique feature of this chip is that each microwell is surrounded by a 1.5µm nanogap connected to an air chamber,which provides a stabilized water–air *** used this chip to observe the lifecycle development of Streptomyces coelicolor and Streptomyces griseus germinated from single spores,which revealed differentiation of aerial hyphae with progeny spores at micron‐scale water–air interfaces and air ***,we demonstrated the applicability of this chip in phenotypic assays by showing that the microbial hormone A‐Factor is involved in the regulatory pathways of aerial hyphae and spore *** microfluidic chip could become a robust tool for studying multicellular differentiation,single‐spore heterogeneity,and secondary metabolism of single‐spore germinated Streptomyces.

关键词： microfluidics multicellular differentiation single cell analysis single‐spore germination Streptomyces

Cognitive impairment associated with individual and joint exposure to PM_(2.5)constituents in a Chinese national cohort

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Frontiers of Environmental Science & Engineering 2024年第9期18卷 39-50页

作者： Boning Deng Yachen Li Lifeng Zhu yuwei Zhou Aonan Sun Jingjing zhang Yixiang Wang Yuxi Tan Jiajun Shen Yalin zhang Zan Ding Yunquan zhang Institute of Social Development and Health Management Hubei Province Key Laboratory of Occupational Hazard Identification and ControlSchool of Public HealthWuhan University of Science and TechnologyWuhan 430065China Baoan Central Hospital of Shenzhen Shenzhen 518102China

Nationwide longitudinal evidence linking cognitive decline with exposure to fine particulate matter(PM_(2.5))constituents remains scarce in *** constructing a dynamic cohort based on the China Health and Retirement Longitudinal Study,we aimed to assess individual and joint associations of PM_(2.5)constituents with cognitive function among middle-aged and older adults in *** mixed-effects models incorporated with quantile-based g-computation were applied to investigate individual and joint associations of long-term exposures to PM_(2.5)constituents with cognitive *** 13,507 respondents,we evaluated 38,950 follow-up records of cognitive function *** in global cognitive score associated with an interquartile range(IQR)increase in exposure were−1.477(95%CI:−1.722,−1.232)for nitrate,followed by−1.331(−1.529,−1.133)for ammonium,−1.033(−1.184,−0.883)for sulfate,−0.988(−1.144,−0.832)for organic matter and−0.822(−0.946,−0.699)for black *** IQR-equivalent increase in joint exposure to these PM_(2.5)constituents was associated with a decline of−1.353(−1.659,−1.048)in global cognitive ***,younger,and well-educated individuals were at greater vulnerability to cognitive impairment related to individual and joint exposure to PM_(2.5)*** study suggested that later-life exposures to PM_(2.5)constituents were associated with cognitive decline in middle-aged and older adults in China.

关键词： Air pollution PM_(2.5)constituents Cognitive function Joint exposure Middle-aged and older adults

基于集聚度的中国公共卫生人力资源分布公平性分析

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中国社会医学杂志 2024年第1期41卷 97-101页

作者：孙海橦张育玮马庆华刘晓程军平马亚娜苏州大学苏州医学院公共卫生学院江苏苏州215123 苏州市相城区第三人民医院江苏苏州215134 苏州市第五人民医院江苏苏州215134

目的综合分析并评估2012年和2019年我国公共卫生人才分布的公平性,为我国公共卫生人力资源优化配置和完善提供一定的科学依据。方法整合2012年和2019年我国卫生统计年鉴的数据,使用集聚度评价的方法从人口和面积两个方面对我国公共卫生... 详细信息

目的综合分析并评估2012年和2019年我国公共卫生人才分布的公平性,为我国公共卫生人力资源优化配置和完善提供一定的科学依据。方法整合2012年和2019年我国卫生统计年鉴的数据,使用集聚度评价的方法从人口和面积两个方面对我国公共卫生人员配置的公平性进行评价,采用SPSS 23.0软件进行描述性分析,并计算卫生资源集聚度(health resource agglomeration degree,HRAD_(i))以及卫生资源集聚度和人口集聚度的比值(HRAD_(i)/PAD_(i))评估公共卫生资源配置公平性。结果2012年和2019年,各省市专业公共卫生机构的卫生资源集聚度范围分别为0.02~23.22和0.02~19.59,各省市疾控中心的HRAD_(i)范围分别为0.04~23.34和0.06~24.69。结论我国公共卫生人才队伍按人口配置的公平性较好,按土地面积配置的公平性较差,应兼顾土地面积与人口因素,合理对公共卫生人力资源进行配置。

关键词：公平性公共卫生人力资源集聚度

Melatonin and dopamine alleviate waterlogging stress in apples by recruiting beneficial endophytes to enhance physiological resilience

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Journal of Integrative Agriculture 2024年第7期23卷 2270-2291页

作者： Yang Cao Peihua Du yuwei Shang Jiahao Ji Leiqing Tan Xue zhang Jizhong Xu Bowen Liang College of Horticulture Hebei Agricultural UniversityBaoding 071001China

Melatonin and dopamine can potentially prevent waterlogging stress in *** current study investigated the mechanism by which melatonin and dopamine alleviate apple waterlogging *** study demonstrated that melatonin and dopamine alleviated waterlogging by removing reactive oxygen species(ROS),and that the nitric oxide(NO)content and nitrate reductase(NR)activity were significantly *** and dopamine were also found to recruit different candidate beneficial endophytes(melatonin:Novosphingobium,Propionivibrio,and Cellvibrio;dopamine:Hydrogenophaga,Simplicispira,Methyloversatilis,Candidatus_Kaiserbacteria,and Humicola),and these endophytes were significantly and positively correlated with plant *** analyses showed that melatonin and dopamine significantly affected the endophytic bacterial and fungal communities under waterlogging *** metabolomic results showed that melatonin and dopamine led to waterlogging resistance by upregulating the abundance of beneficial substances such as amino acids,flavonoids,coumarins,and organic *** addition,melatonin and dopamine regulated the physicochemical properties of the soil,which altered the endophyte community and affected plant *** co-occurrence network demonstrated close and complex relationships among endophytes,metabolites,soil,and the *** results demonstrate that melatonin and dopamine alleviate waterlogging stress in apples by recruiting beneficial endophytes to enhance physiological *** study provides new insights into how melatonin and dopamine alleviate stress and a theoretical basis for synergistic beneficial microbial resistance to waterlogging stress.

关键词： dopamine endophytes Malus hupehensis melatonin metabolomics waterlogging

An Improved Hybrid Algorithm for Minimizing Energy Consumption and Cycle Time in Flexible Process Planning

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An Improved Hybrid Algorithm for Minimizing Energy Consumpti...

Light-Mediated Spatiotemporally Dynamic Assembly of DNA Nanostructures in Living Cells Regulates Autophagy

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作者： Min Dai yuwei zhang College of Mechanical Engineering Yangzhou University

Nowadays, sustainable manufacturing has been recognized as a key technology for advanced manufacturing, and improving energy efficiency of manufacturing system is an important aspect. However, little attention has been paid to the development of flexible process planning（FPP） problem that takes into account the energy consumption. In this paper, an energy-efficient flexible process planning model that incorporates energy consumption and cycle time is proposed. For solving the problem, an improved hybrid algorithm（IHA） based on hormone modulation mechanism is devised to explore the optimal solution. The IHA incorporates a new crossover operation based on the precedence constrain module and a new annealing rate function inspired by hormone modulation mechanism. The IHA tries to overcome the local optimum and further to explore the solution space. Finally, computational experiments were conducted, and the comparison was made for the approach and other algorithms like GA and SA. The experimental results show that the approach is feasible and effective in the optimization research of flexible process planning.

关键词： Energy Efficiency Flexible Process Planning Hormone Modulation Hybrid Algorithm

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CCS Chemistry 2024年第6期6卷 1557-1570页

作者： Rui zhang Pin Hu yuwei Xu Ziqing Wang Dayong Yang Chi Yao Frontiers Science Center for Synthetic Biology Key Laboratory of Systems Bioengineering(MOE)School of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350 Department of Chemistry State Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsCollege of Chemistry and MaterialsFudan UniversityShanghai 200438

The assembly of exogenous artificial architectures inside cells can regulate a series of biological events,which heavily relies on the development of spatiotemporally controlled molecular assembly *** herein report a designer deoxyribonucleic acid(DNA)nanostructure that enables light-mediated spatiotemporally dynamic assembly in living cells and consequently achieves efficient regulation of cell *** DNA nanostructure was constructed from i-motif moiety-containing branched DNA,photocleavable bond-containing linker,and tumor cell-targeting *** cellular uptake mediated by aptamers,under the spatiotemporal control of both UV light and late endosomal/lysosomal acidic environments,disassembly/reassembly of DNA nanostructure occurred via two rationally designed routes,generating microsized DNA *** a result,autophagy was significantly enhanced with the increase of DNA assembly *** enhanced autophagy showed an impact on related biological *** system is expected to be a powerful tool for the regulation of intracellular events and cellular behaviors.

关键词： DNA nanotechnology DNA hydrogel self-assembly autophagy i-motif