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living concrete with self-healing function on cracks attributed to inclusion of microorganisms: Theory, technology and engineering applications——A review

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Science China(Technological Sciences) 2021年第10期64卷 2067-2083页

作者： QIAN ChunXiang zheng TianWen rui YaFeng School of Materials Science and Engineering Southeast UniversityNanjing 211189China Research Center of Green Building&Construction Materials Southeast UniversityNanjing 211189China Key Lab of Microbial Bio-mineralization Technology China Construction Materials IndustryNanjing 211189China Jiangsu Key Laboratory for Construction Materials Southeast UniversityNanjing 211189China

Concrete is the most widely used composite material in civil *** induced calcium carbonate precipitation(MICP)is a green and environmental friendly technology,which has received extensive attention in repair of concrete *** paper introduces the research progress in Southeast University research in past 16 *** the early stage,MICP technology of urea hydrolyzed by Bacillus pasteurii was mainly investigated to repair the surface cracks and to fill large-size cracks with ***,aiming at the hidden cracks that were difficult for human intervention,a new mineralization route of Bacillus mucilaginosus was proposed,which could repair faster than Bacillus alcalophilus,and the problem of ammonia emission in the repair process of Bacillus pasteurii was also *** addition,in order to improve the protection of bacteria and the self-healing efficiency of the later age cracks,the methods of fiber immobilization,carrier uniformly immobilization and core-shell structural immobilization had been compared and *** results showed that core-shell structural immobilization had good protection ability and strong ***’s more,the paper also summarized the characteristics of spore germination,cell activity,nucleation and biological calcium carbonate in crack zone,and introduced the application experience of microbial self-healing concrete in water conservancy projects and subway stations.

关键词： living concrete self-healing crack microorganisms engineering application

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Plasmonic nanostructures acting as a light-driven O_(2)-sensitive nitroreductase mimic for enhanced photochemical oxidation of para-aminothiophenol

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Nano Research 2023年第11期16卷 12697-12705页

作者： Xinshuang Gao Jia-jia zheng Hanbo li rui Cai Xingfa Gao Xiaochun Wu CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and TechnologyBeijing 100190China Laboratory of Theoretical and Computational Nanoscience National Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Nanozymes,as a novel form of enzyme mimics,have garnered considerable *** overcoming the main disadvantages of their natural analogs,they still face challenges such as restricted mimic types and low substrate ***,we introduce a reactive ligand modification strategy to diversify enzyme mimic ***,we have utilized helical plasmonic nanorods(HPNRs)modified with para-nitrothiophenol(4-NTP)to create an oxygen-sensitive nitroreductase(NTR)with *** act as a light-adjustable source of nicotinamide adenine dinucleotide/nicotinamide adenine dinucleotide phosphate(NAD(P)H),providing photon-generated energetic electrons to adsorbed 4-NTP *** the presence of O_(2),the activated 4-NTP transfers the captured electron to the adsorbed O_(2),mimicking the electron transfer process in its natural *** enhanced O_(2)activation notably boosts the oxidative coupling of para-aminothiophenol(4-ATP).Density functional theory(DFT)calculations reveal that hot electrons injected into the lowest unoccupied molecular orbital(LUMO)energy level of 4-NTP can be transferred to that of molecular *** conclusion,our findings underline the potential of the reactive ligand modification strategy in developing new types of enzyme reactions,which opens up promising avenues for the enhancement and diversification of nanozyme functionalities.

关键词： plasmonic nanostructure nanozyme nitroreductase para-nitrothiolphenol hot electron injection para-aminothiolphenol

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Structural engineering of Sb-based electrode materials to enhance advanced sodium-ion batteries

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Rare Metals 2024年第10期43卷 4777-4806页

作者： zheng Yang Qiao-ling Kang rui-Wang li-Jing Yan Xian-He Meng Ting-li Ma College of Materials and Chemistry Jiliang UniversityHangzhou 310018China

Antimony(Sb)is recognized as a potential electrode material for sodium-ion batteries(SIBs)due to its huge reserves,affordability,and high theoretical capacity(660 mAh·g^(-1)).However,Sb-based materials experience significant volume expansion during cycling,leading to comminution of the active substance and limiting their practical use in ***,the volume expansion issue of Sb-based materials during charging/discharging must be solved to create high-performance *** paper presents a detailed review of structural engineering of Sb-based electrode materials,focusing on the performance effects of different kinds of structures on advanced performance ***,the future development and the challenges of Sb-based materials are *** paper can provide specific perspectives on the structure construction and optimization of Sb-based anode materials so as to promote the rapid development and practical applications of SIBs.

关键词： Sb-based electrode Sodium-ion batteries Structural engineering

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基于系统动力学的应急物资协同储备模型研究

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灾害学 2025年第1期40卷 153-159页

作者：王剑伟凌大荣李德李睿赵爽陆军勤务学院重庆401311

该文探讨了在应急物资保障过程中,如何有效解决初期末端物资供应不足和后期物资库存过剩的问题。通过分析应急物资保障过程中的相关因素,运用先分解后耦合的系统工程法构建了应急物资协同储备系统动力学模型。以中国西南地区某省为例,... 详细信息

该文探讨了在应急物资保障过程中,如何有效解决初期末端物资供应不足和后期物资库存过剩的问题。通过分析应急物资保障过程中的相关因素,运用先分解后耦合的系统工程法构建了应急物资协同储备系统动力学模型。以中国西南地区某省为例,模拟应对较大规模地震灾害的情况,利用Vemsin PLE软件对模型进行分析,得到优化方案。研究表明:①加大末端物资储备量,尤其是交通不便地区,能有效应对前期物资需求;②通过调整末端与上级的期望物资使用天数,可大幅减少物资总库存量,提高经济性;③降低物资总库存量能减小库存波动幅度,增强物资供应链路的稳定性。通过上述分析,为优化应急物资储备模式提供了参考,有助于提升应急管理的效率和效果。

关键词：系统动力学应急物资协同储备模拟仿真

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Fatigue damage analysis of ballastless slab track in heavy-haul railway tunnels

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Underground Space 2022年第3期7卷 440-452页

作者： Zi-qiang li zheng li Wei-wei Huang Hong-rui Zhang Hang Zhang School of Civil Engineering and Architecture Chongqing University of Science&TechnologyChongqing 41331China Chongqing City Construction Investment(Group)Co. Ltd.Chongqing 400023China Key Laboratory of New Technology for Construction of Cities in Mountain Area Ministry of EducationChongqing UniversityChongqing 400045China School of Mechanical and Electrical Engineering Hainan UniversityHainan 570228China

A ballastless slab track,which is commonly used in the track structures of heavy-haul railway tunnels,was analysed based on field measurement data of the Fuyingzi Tunnel on the Zhangtang *** accordance with the measured data,the dynamic load thresholds and distributions on the surface and bottom of the ballastless slab track were investigated.A fatigue damage analysis of the ballastless slab track was performed based on the dynamic load time–history *** results show that the ballastless slab track can accomplish train load attenuation and reduce the dynamic load from heavy-haul trains by 47.22%from the surface to the *** addition,the distribution at the bottom of the ballastless slab track exhibited a triangular shape,and the dynamic load threshold at the line centre accounted for 78.67%of that at the track ***,the distribution at the surface was saddle-shaped;the dynamic load threshold at the track position accounted for 79.55%of that at the line centre *** fatigue damage of the ballastless slab track was analysed effectively by combining the measured data and the linear fatigue damage ***,the accuracy of the calculation results was verified based on the measured dynamic stress of the ballastless slab track *** dynamic action of the train load led to more-concentrated damage to the track bed,and the damage occurred earlier than that in the ordinary *** axle load was the primary influencing factor of the track bed fatigue damage,and the damage mainly occurred in the track *** results provide a theoretical basis for performing stress analysis and designing parameters for ballastless slab tracks in heavy-haul railway tunnels.

关键词： Heavy-haul railway tunnel Numerical simulation results Ballastless slab track Fatigue damage

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Study of thermal decoherence of harmonic oscillators

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原子与分子物理学报 2025年第5期42卷 108-114页

作者： li Jian ZHOU Gao-liang YAN zheng-Xin liU Wei WANG Zhao-Qi College of Science Xi’an University of Science and TechnologyXi’an 710054China

The thermal decoherence of harmonic oscillators is investigated *** quantum system presented here is a one-dimensional oscillator with angular frequency,which is surrounded by a thermal bath of environmental *** are various environmental oscillators with different angular frequency(below an ultraviolet cutoff).At the beginning,the quantum system is a pure state and the environmental oscillators are in thermodynamic equilibrium with *** a period,the system-environment interactions inspire significant decoherence of the quantum *** decoherence is displayed by explicit calculations of the purity and von Neumann entropy of the quantum *** is worth noting that the decoherence could be significant even in the weak coupling and low temperature case due to the large amount of environmental degrees of *** the decoherence process is inspired between the quantum system and an ordinary thermal environment here,the thermal decoherence result is quite general.

关键词： Quantum decoherence Grand canonical ensemble Oscillators

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Reduction of mercury(Ⅱ)by electrons contained in carbon dots:An environmentally friendly cold vapor generation for mercury analysis

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Chinese Chemical Letters 2020年第10期31卷 2678-2682页

作者： Tao Chen Yao lin Haochen li rui Yang Xiandeng Hou Baozhan zheng Chengbin zheng Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu 610064China Chengdu No.7 High School Chengdu 610041China Analytical&Testing Center Sichuan UniversityChengdu 610064China

In this work,the reduction of mercury ions(Hg2+)to elemental mercury(Hg0)was easily achieved using highly reductive carbon dots(r-CDs),which synthesized from sucrose by a simple and cost-effective *** a careful mechanistic study,the reduction was probably accomplished with the large numbers of electrons contained in r-CDs rather than the oxidation of its functional ***,a3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT)assay showed that the r-CDs were nontoxic to wildlife and human ***,the r-CDs were used as an alternative to toxic reductants(SnCl2 or NaBH4)for the sensitive and in situ determination of mercury by cold vapor gene ration(CVG)coupled to a miniature point discharge optical emission spectrometer(μPD-OES).limit of detection of 0.05μg/L was obtained for Hg2+,with relative standard deviation(RSD)less than 5.4%at a concentration of 5μg/*** accuracy of r-CDs induced CVG-μPD-OES was validated by the determination of mercury in a certified reference material(DOLT-5,dogfish liver)and five natural water samples collected from different rivers and lakes in Chengdu City,Since r-CDs are nontoxic and prepared from abundant and inexpensive sucrose,the r-CDs induced CVG-μPD-OES retains the great potential for the inexpensive and enviro nmentally friendly field analysis of mercury in natural *** accuracy of the proposed method was validated by the analysis of a certified reference material and several water samples with satisfactory results.

关键词： Mercury analysis Reduction Carbon dots Cold vapor generation

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Acyl Thioacetamide-group Chelated Nanofiber to Adsorb Silver Ions from Aqueous Systems

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Chemical Research in Chinese Universities 2014年第4期30卷 685-689页

作者： ZHANG Chengcheng li Xiang zheng Tian ZHAO rui WANG Ce Alan G. MacDiarmid Institute College of Chemistry Jilin University Changchun 130012 P. R. China Key Laboratory of Engineering Dielectrics and Its Application Ministry of Education Harbin University of Science and Technology Harbin 150080 P. R. China

The acyl thioacetamide-group chelated nanofiber was prepared from polyacrylonitrile（PAN） fiber with thioacetamide as vulcanization agent by an electrospinning process combined with chemical *** was found that the chelated nanofiber displays a high adsorption capacity and adsorption selectivity for Ag（Ⅰ） ions from aqueous *** adsorption capacity of Ag（Ⅰ） ions on chelated nanofiber increases with the increase of adsorption *** of the Ag（Ⅰ） ions adsorption was found to follow pseudo-second-order rate *** on the characterization results,a possible mechanism of Ag（Ⅰ） ions adsorbed on the acyl thioacetamide-group chelated nanofiber was *** chelated nanofiber could not only chelate to Ag（Ⅰ） ions but also reduce *** study provides a promising nanofiber material for removing heavy metal ions.

关键词： Electrospinning Chelated nanofiber Adsorption

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Vertical profiles of fluid velocity and suspended sediment concentration in nearshore

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International Journal of Sediment Research 2013年第3期28卷 406-412页

作者： Jun zheng rui-jie li Qing.FENG Sha-sha LU Key Laboratory of Coastal Disaster and Defence Ministry of EducationHohai University Key Labortory of Sea-field Management Techniques State Oceanic Administration Environment Marine Laboratory Hohai University Second Institute of Oceanography SOA

Based on the power function of velocity and the friction velocity,a velocity profile is *** solving the Schmidt’s diffusion equation,an equilibrium suspended sediment concentration profile is further *** profiles of velocity and suspended sediment concentration agree well with the field data,and the profile of suspended sediment concentration avoids the unreasonableness of the classical Rouse profile such as a zero value at the water *** to these profiles,an expression which is easy to use for calculating the suspended sediment transport rate is derived.

关键词： Velocity profile Sediment concentration profile Suspended sediment transport rate Sediment-laden flow Nearshore

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Reconceptualizing kinesin＇s working cycle as separate chemical and mechanical processes

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Frontiers of physics 2018年第5期13卷 153-163页

作者： Hui-Juan Xu Tong Tong rui-zheng Hou Hong-Rong li School of Science Xi'an Jiaotong University Xi'an 710049 China Institute of Quantum Optics and Quantum Information Xi'an Jiaotong University Xi'an 710049 China

The biomolecular motor kinesin uses chemical energy released from a fuel reaction to generate di- rectional movement and produce mechanical work. The underlying physical mechanism is not fully understood yet. To analyze the energetics of the motor, we reconceptualize its chemomechanical cy- cle in terms of separate fuel reaction and work production processes and introduce a thermodynamic constraint to optimize the cycle. The model predicts that the load dependences of the motor＇s veloc- ity, stepping ratio, and dwell time are determined by the mechanical parameters of the motor-track system rather than the fuel reaction rate. This behavior is verified using reported experimental data from wild-type and elongated kinesins. The fuel reaction and work production processes indicate that kinesin is driven by switching between two chemical states, probably following a general pattern for molecular motors. The comparison with experimental data indicates that the fuel reaction processes are close to adiabatic, which is important for efficient operation of the motor. The model also suggests that a soft, short neck linker is important for the motor to maintain its load transport velocity.

关键词： kinesin chemomechanical coupling thermodynamics entropy production

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