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Investigation on Purine Corrosion Inhibitions via Quantum Chemical Calculation

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Computer Modeling in Engineering & Sciences 2018年第7期116卷 1-10页

作者： Fengjuan Wang Shengping Wu jinyang jiang School of Material Science and Engineering Southeast UniversityNanjing 211189China jiangsu Key Laboratory of Construction Materials Nanjing 211189China

Corrosion inhibition performances of three purine derivatives were investigated systematically by employing DFT and molecular *** relationship between macroscopic inhibition efficiency and quantum chemical properties was discussed from multiple perspectives,based on frontier orbital theory,and Fukui function *** experimental and theoretical studies were taken,indicating the inhibition efficiency could be analyzed in the order of guanine<2,6-diaminopurine<2,*** sulphur atom(S5)was validated to be the most susceptible site for electrophile via quantitative surface analysis.

关键词： Acid solutions acid inhibition DFT calculation mild steel modelling studies

Coupling Mechanism of Saturated Concrete Subjected to Simultaneous Fatigue Loading and Freeze-thaw Cycles

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Journal of Wuhan University of Technology(Materials Science) 2018年第5期33卷 1121-1128页

作者： QIAO Yunfeng SUN Wei jiang jinyang PAN Dongfang School of Material Science and Engineering Southeast UniversityNanjing 211189China School of Civil Engineering Qingdao Agriculture UniversityQingdao 266109China

The coupling mechanism of saturated concrete subjected to simultaneous 4-point fatigue loading and freeze-thaw cycles was, for the first time, experimentally studied by strain technology. The coupling strain, temperature strain and fatigue strain of concrete specimens were measured at the same time from one sample with stain analysis method and the relationship among these three kinds of strains was studied by fitting data to present coupling mechanism at macro level. The results showed that there was no interaction between fatigue strain and temperature strain and the coupling strain could be written by linear superposition of temperature strain and fatigue strain.

关键词： coupling mechanism fatigue loading freeze-thaw cycles strain saturated concrete

Reverse erasure guided spatio-temporal autoencoder with compact feature representation for video anomaly detection

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Science China(Information Sciences) 2022年第9期65卷 286-288页

作者： Yuanhong ZHONG Xia CHEN jinyang jiang Fan REN School of Microelectronics and Communication Engineering Chongqing University State Grid Chongqing Electric Power Research Institute Changan Software Technology Company Changan Automobile Corp.

Video anomaly detection aims to learn normal patterns and identify the samples deviating from normal patterns as anomalies. In early research, methods based on handcrafted low-level features have been widely studied. However, the representation power of low-level features is insufficient for describing various patterns, causing a bottleneck in handcrafted-feature-based anomaly detection.

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Spontaneous hierarchical surface engineering of minerals through coupled dissolution-precipitation chemistry

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Aggregate 2024年第1期5卷 460-472页

作者： jinyang jiang Jiawen Zhang Lanxin Wang Zeyu Lu Fengjuan Wang Zhiyong Liu Hongbo Zeng jiangsu Key Laboratory of Construction Materials School of Materials Science and EngineeringSoutheast UniversityNanjingChinal 2Chemical and Materials EngineeringUniversity of AlbertaEdmontonAlbertaCanada

Peculiar hierarchical microstructures in creatures inspire modern material design with distinct *** can effortlessly construct sophisticated yet long-range ordered microstructure across bio-membrane through ion secretion and ***,microstructure biomimicry in current technology generally requires elaborate,point-by-point ***,a spontaneous yet controllable strategy is developed to achieve surface microstructure engineering through a natural surface phenomenon similar to ion secretion-precipitation,that is,coupled dissolution-precipitation.A series of hierarchical microstructures on mineral surfaces in fluids with tunable morphology,orientation,dimension,and spatial distribution are achieved by simply controlling initial dissolution and fluid *** seawater,long-range ordered film of vertically aligned brucite flakes forms through interfacial dissolution,nucleation,and confinement-induced orientation of flakes with vertically grown{110}plane,on the edge of which,fusiform aragonite epitaxially *** negligible initial surface dissolution,prismatic aragonite epitaxially grows on a calcite polyhedron-packed *** tuning fluid chemistry,closely packed calcite polyhedron and loosely packed calcite micro-pillars are engineered through rapid and retarded precipitation,***,the spontaneously grown microstructures resemble those deliberately created by human or found in nature,and tremendously modulate surface *** findings open new possibilities for facile and customizable engineering of microstructural surfaces,hierarchical heterostructures,and biomimetic materials.

关键词： directional crystallization dissolution-precipitation chemistry hierarchical microstructures spontaneous growth surface engineering

Design of Eco-friendly Ultra-high Performance Concrete with Supplementary Cementitious Materials and Coarse Aggregate

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Journal of Wuhan University of Technology(Materials Science) 2019年第6期34卷 1350-1359页

作者： jiang jinyang ZHOU Wenjing CHU Hongyan WANG Fengjuan WANG Liguo FENG Taotao GUO Dong School of Materials Science and Engineering Southeast UniversityNanjing 211189China College of Civil Engineering Nanjing Forestry UniversityNanjing 210037China Naval Institute of Engmeering Design and Research PLABeijing 100070China

Aiming to investigate the mix design of eco-friendly UHPC with supplementary cementitious materials and coarser aggregates, we comprehensively studied the workability, microstructure, porosity, compressive strength, flexural strength, and Young’s modulus of UHPC. Relationship between compressive strength and Young’s modulus was obtained eventually. It is found that the compressive strength, flexural strength, and Young’s modulus of UHPC increase by 19.01%, 10.81%, and 5.99%, respectively, when 40 wt% cement is replaced with supplementary cementitious materials. The relationship between compressive strength and Young’s modulus of UHPC is an exponential form.

关键词： ultra-high perform ance concrete eco-friendly porosity compressive strength flexural strength Young’s modulus

An Analytical Method to Detect the Coupling Damage Relationship of Concrete Subjected to Bending Fatigue and Temperature Actions

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Journal of Wuhan University of Technology(Materials Science) 2011年第3期26卷 573-577页

作者：李文婷 School of Materials Science and Engineering Southeast University

Based on the assumptions validated by the experiments,an analytical method to detect the coupling actions of bending fatigue and temperature on concrete was *** this purpose,a coefficient denoted by f D （T）with the strain distributions caused by these two actions was *** terms of the known parameters and the fitted functions of strain,the explicit expression for f D （T）which develops in the way same as the law of temperature change in the body of specimens was *** experimental results indicate that the weigh fraction of temperature stress decreases in the coupling damage field with the fading temperature gradient,and consequently disclose the mutual influence between these two types of actions in the loading history.

关键词： analytical method coupling damage concrete bending fatigue temperature

Formation and Characterization of CdS Hollow Structures

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Journal of Wuhan University of Technology(Materials Science) 2008年第3期23卷 425-427页

作者：胡鹏 Key Laboratory of Fiber Optic Sensing Technology and Information Processing(Ministry of Education) Wuhan University of Technology

CdS hollow structures were built up by using the one pot method and using carbon disulfide （CS2） and ethylenediamine as starting materials. CS2 is insoluble in water and could form metastable oil droplets in the water at a moderate temperature. The oil droplets formed chains in the circumvolving water. CdS crystals grew and mineralized on the surfaces of the CS2 droplet chains, forming CdS shells around the unreacted CS2 cores. After the surrounding temperature was raised above the boiling point of CS2, the unreacted CS2 cores vaporized, leaving the CdS shelled hollow structures. The CdS hollow structures were characterized by using a transmission electron microscope, an X-ray diffractometer, a UV-Visible spectrophotometer and a fluorescence spectrophotometer. The CdS hollow structures were mainly tubes with closed ends. The exterior diameter and the interior diameter of tubes were about 50 nm and about 15 nm, respectively. Compared with the absorption onset wavelength of the bulk CdS, the CdS hollow structures exhibited a blue shift of about 57 nm. While excited at 213 nm, the CdS hollow structures emitted greenish blue light centered at 470 nm.

关键词： nanomaterial optical material Cadmium sulfide hollow structure

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塑造城市的物质基础——水泥混凝土

硅酸盐学报 2023年第5期51卷 1091-1092页

作者：蒋金洋元强东南大学材料科学与工程学院中南大学土木工程学院

1824年英国人Joseph Aspdin发明了“波特兰水泥”，并获得了专利证书，标志着现代硅酸盐水泥的诞生。百余年来，水泥配方、生产工艺和生产设备得到了不断优化和革新，波特兰水泥从初期质量不稳定的小众产品发展为质量稳定的规模化工业... 详细信息

1824年英国人Joseph Aspdin发明了“波特兰水泥”，并获得了专利证书，标志着现代硅酸盐水泥的诞生。百余年来，水泥配方、生产工艺和生产设备得到了不断优化和革新，波特兰水泥从初期质量不稳定的小众产品发展为质量稳定的规模化工业产品，成为了人类建造基础设施的主要建筑材料，其与钢筋结合组成的钢筋混凝土是建筑、道路、铁路、桥梁、大坝等基础设施建造的主要结构材料，应用场景覆盖了地球的每个角落，人类文明得以在“钢筋混凝土丛林”中生生不息。

关键词：水泥混凝土低碳

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非饱和硬化水泥浆氯离子扩散性能的数值模拟

建筑材料学报 2016年第6期19卷 1057-1061页

作者：高云蒋金洋吴凯东南大学材料科学与工程学院江苏南京211189 同济大学材料科学与工程学院上海201804

基于固相分形模型和格子Boltzmann方法,通过数值模拟手段研究非饱和硬化水泥浆的氯离子扩散性能.首先应用固相分形模型来模拟硬化水泥浆的多孔结构,在此基础上采用格子Boltzmann方法模拟相应的氯离子扩散.在固相分形模型中,按照孔隙尺... 详细信息

基于固相分形模型和格子Boltzmann方法,通过数值模拟手段研究非饱和硬化水泥浆的氯离子扩散性能.首先应用固相分形模型来模拟硬化水泥浆的多孔结构,在此基础上采用格子Boltzmann方法模拟相应的氯离子扩散.在固相分形模型中,按照孔隙尺寸分布对硬化水泥浆多孔结构进行逐级饱和来实现饱和度的变化.对比当前数值模拟的结果与经典幂函数型饱和函数的预测结果,发现二者吻合较好,饱和系数的合理取值为4~5.

关键词：饱和度饱和函数固相分形模型格子Boltzmann方法氯离子扩散