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Effects of Positron Diffusion and Its Application in Composite System

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Journal of Materials Science & Technology 2000年第3期16卷 311-314页

作者： jian jiang, Xinzhang ZHOU and ChiWei LUNG (International Center for Materials Physics, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China) International Center for Materials Physics Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

The effects of positron diffusion on the measured S parameter have been investigated by a point-source diffusion model and a δ function method. Firstly, the theoretical analyses of the effects are presented for the samples of a homogeneous semi-infinite medium and a film of definite thickness. Then the results are used to analyze the S parameters in several composite systems and interface models.

关键词： Effects of Positron Diffusion and Its Application in Composite System

Diversity-oriented synthesis of marine sponge derived hyrtioreticulins and their anti-inflammatory activities

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Chinese Journal of Natural Medicines 2022年第1期20卷 74-80页

作者： CHEN Bo-Ru GAO Cheng-Long LIU Jin GUO Yue-Wei jiang jian-Lan PANG Tao LI Xu-Wen School of Chemical Engineering and Technology Tianjin UniversityTianjin 300350China State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China State Key Laboratory of Natural Medicines New Drug Screening CenterChina Pharmaceutical UniversityNanjing 210009China Open Studio for Druggability Research of Marine Natural Products Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

Diversity-oriented synthesis is aimed to increase the chemical diversity of target natural products for extensive biological activity *** ring is an important functional group in a large number of drugs and other biologically active agents,and indole-containing natural products have been frequently isolated from marine sources in recent *** this paper,a series of indole-containing marine natural hyrtioreticulin derivatives,including 19 new ones,were designed,synthesized through a key Pictet-Spengler reaction,and evaluated for their inflammation related *** 13b displayed the most promising activity by inhibiting TNF-αcytokine release with an inhibitory rate of 92%at a concentration of 20μmol·L^(−1).A preliminary structure-activity relationship analysis was also *** research may throw light on the discovery of marine indole alkaloid derived anti-inflammatory drug leads.

关键词： Indole alkaloid Pictet-Spengler reaction Inflammation Hyrtioreticulin

Novel berberine derivatives:Design,synthesis,antimicrobial effects,and molecular docking studies

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Chinese Journal of Natural Medicines 2018年第10期16卷 774-781页

作者： YAO Ling WU Ling-Ling LI Qian HU Qin-Mei ZHANG Shu-Yuan LIU Kang jiang jian-Qin School of Traditional Chinese Pharmacy China Pharmaceutical University

A series of berberine derivatives were synthesized by introducing substituted benzyl groups at *** these synthesized compounds（4a–4m）were screened for their in vitro antibacterial activity against four Gram-positive bacteria and four Gram-negative bacteria and evaluated for their antifungal activity against three pathogenic fungal *** these compounds displayed good antibacterial and antifungal activities,compared to reference drugs including Ciprofloxacin and Fluconazole;Compounds 4f,4g,and 4l showed the highest antibacterial and antifungal ***,all the synthesized compounds were docked into topoisomerase Ⅱ-DNA complex,which is a crucial drug target for the treatment of microbial *** results showed that H-bond,π-πstacked,π-cationic,andπ-anionic interactions were responsible for the strong binding of the compounds with the target protein-DNA complex.

关键词： Antimicrobial drugs Berberine derivatives Molecular docking Topoisomerase Ⅱ DNA gyrase SAR

The Effects of Solid Phase Additives on Sintering Properties of Alumina Bioceramic

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Journal of Wuhan University of Technology(Materials Science) 2003年第2期18卷 23-24页

作者：王欣宇 Wuhan University of Technology

In order to reduce the sintering temperature and improve the preparing conditions of alumina bioceramics,the Mg-Zr-Y composite solid phase additives were added into high purity Al 2O 3 micro-powder by chemical coprecipitation *** powder was shaped under 200MPa cold isostatic pressure,and then the biscuits were sintered at 1600℃ under normal *** sintered alumina materials were tested and the sintering mechanism was *** results show that physical properties of the material were improved *** Mg-Zr-Y composite solid additives could promote the sintering of alumina bioceramics and the mechanism is solid phase sintering.

关键词： alumina sintering additives property

Peakon Excitations and Fractal Dromions for General (2+1)-Dimensional Korteweg de Vries System

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Communications in Theoretical Physics 2007年第12期48卷 1063-1066页

作者： MA Song-Hua LI jiang-Bo FANG jian-Ping College of Mathematics and Physics,Lishui University,Lishui 323000,China College of Mathematics and Physics Lishui University

By means of an extended mapping approach and a linear variable separation approach,a new family ofexact solutions of the general (2+1)-dimensional Korteweg de Vries system (GKdV) are *** on the derivedsolitary wave ex... 详细信息

关键词： extended mapping approach GKdV system peakon excitation fractal dromion

Synthesis,Characterization and Standard Molar Formation Enthalpy of [Sm(C_7H_5O_3)_2(C_4H_6NO_2S)]·2H_2O

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Chemical Research in Chinese Universities 2009年第4期25卷 564-568页

作者： LI Xu YANG De-jun LI Qiang-guo LI Ai-tao YE Li-juan jiang jian-hong Department of Chemistry and Life Science Xiangnan University Chenzhou 423000 P. R. China

[Sm（C7H5O3）2（C4H6NO2S）]·2H2O was synthesized from the reaction of samarium chloride hexahydrate with salicylic acid and thioproline,and characterized by IR,elemental analysis and thermogravimatric *** standard molar enthalpies of the solutions of SmCl3·6H2O（s）,2[C7H6O3（s）],[C4H7NO2S（s）] and [Sm（C7H5O3）2·（C4H6NO2S）·2H2O（s）] in a mixed solvent of absolute ethyl alcohol,dimethyl formamide（DMF） and 3 mol/L HCl were,respectively,determined by calorimetry to be ΔsHm^Θ [SmCl3·6H2O（s）,298.15 K]=（-46.68±0.15） kJ/mol,ΔsHm^Θ [2C7H6O3（s）,298.15 K]=（25.19±0.02） kJ/mol,ΔsHm^Θ [C4H7NO2S（s）,298.15 K]=（16.20±0.17） kJ/mol and ΔsHm^Θ {[Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s）,298.15 K}=（-81.24±0.67） kJ/*** enthalpy change of the reaction SmCl3·6H2O（s）＋2C7H6O3（s）＋C4H7NO2S（s）=[Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s）＋3HCl（g）＋4H2O（l） was determined to be ΔrHm^Θ =（123.45±0.71） kJ/*** the data in the literature,the standard molar formation enthalpy of [Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s） was estimated to be Δf Hm^Θ {[Sm（C7H5O3）2（C4H6NO2S）]·2H2O（s）,298.15 K}=（-2912.03±3.1） kJ/mol through Hess＇ law.

关键词： Samarium chloride hexahydrate Salicylic acid Thioproline Standard molar formation enthalpy

Double⁃Shear Experiments of Cold⁃Formed Steel Stud⁃to⁃Sheathing Connections at Elevated Temperatures

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Journal of Harbin Institute of Technology(New Series) 2021年第6期28卷 44-62页

作者： Kun Liu Wei Chen Jihong Ye Yuze Yang jian jiang Yafei Qin jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering China University of Mining&TechnologyXuzhou 221116China Key Laboratory of Building Fire Protection Engineering and Technology of MPS Tianjin 300381China Shanghai Beststeel Steel Structure Building System Co. Shanghai 200949China

The behavior of cold⁃formed steel(CFS)stud⁃to⁃sheathing connections at elevated temperatures is an important parameter for the fire resistance design and modeling of mid⁃rise CFS *** this paper,three kinds of sheathings,namely,medium⁃and low⁃density calcium⁃silicate boards and oriented strand board,were selected for double⁃shear experiments on the mechanical properties of 253 screw connections at ambient and elevated *** effects of the shear direction,screw edge distance and the number of screws on the behavior of the connections were *** results showed that the shear direction and the screw edge distance more significantly influenced the peak deformation,while their impacts on the peak load varied with the type of *** with the single⁃screw connections,the peak loads of the specimens with double⁃screw connections obviously increased but did not ***,a simplified load⁃displacement curve model of stud⁃to⁃sheathing connections at elevated temperature was generated first by establishing the prediction formula for characteristic parameters,such as the peak load,the peak deformation and the elastic stiffness,and then by considering whether the curves corresponded to stiffness increase *** present investigation provides basic data for future studies on the numerical modeling of CFS structures under fire conditions.

关键词： cold⁃formed steel structures stud⁃to⁃sheathing screw connections double⁃shear experiments elevated temperature load⁃displacement model

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Wafer-scale synthesis of twodimensional materials for integrated electronics

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Chip 2024年第1期3卷 64-83页

作者： Zijia Liu Xunguo Gong Jinran Cheng Lei Shao Chunshui Wang jian jiang Ruiqing Cheng Jun He Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and TechnologyWuhan UniversityWuhan 430072China Wuhan Guide Infrared Co. Ltd.Wuhan 430200China Global Sensor Technology Wuhan 430200China

Two-dimensional(2D)van derWaals materials have attracted great interest and facilitated the development of post-Moore electronics owing to their novel physical properties and high compatibility with traditional microfabrication *** wafer-scale synthesis has become a critical challenge for large-scale integrated *** the wafer-scale synthesis approaches for some 2D materials have been extensively explored,the preparation of high-quality thin films with well-controlled thickness remains a big *** review focuses on the wafer-scale synthesis of 2D materials and their applications in integrated ***,several representative 2D layered materials including their crystal structures and unique electronic properties were ***,the current synthesis strategies of 2Dlayeredmaterials at thewafer scale,which are divided into“top-down”and“bottom-up”,were reviewed in ***,the applications of 2D materials wafer in integrated electrical and optoelectronic devices were ***,the current challenges and future prospects for 2D integrated electronics were *** is hoped that this reviewwill provide comprehensive and insightful guidance for the development of wafer-scale 2D materials and their integrated applications.

关键词： 2D materials Wafer-scale synthesis 2D integrated devices Post-moore electronics

Concept Approximation between Fuzzy Ontologies

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Wuhan University Journal of Natural Sciences 2006年第1期11卷 73-77页

作者： LI Yan-hui XU Bao-wen LU jian-jiang KANG Da-zhou ZHOU Jing-jing Department of Computer Science and Engineering Southeast University Nanjing 210096 Jiangsu China jiangsu Institute of Software Quality Nanjing 210096 JiangsuChina State Key Laboratory of Software Engineering Wuhan UniversityWuhan 430072 Hubei China Institute of Science The People＇s Liberation Army University of Science and Technology Nanjing 210007 Jiangsu China

Fuzzy ontologics are efficient tools to handle fuzzy and uncertain knowledge on the semantic web; but there are heterogeneity problems when gaining interoperability among different fuzzy ontologies. This paper uses concept approximation between fuzzy ontologies based on instances to solve the heterogeneity problems. It firstly proposes an instance selection technology based on instance clustering and weighting to unify the fuzzy interpretation of different ontologies and reduce the number of instances to increase the efficiency. Then the paper resolves the problem of computing the approximations of concepts into the problem of computing the least upper approximations of atom concepts. It optimizes the search strategies by extending atom concept sets and defining the least upper bounds of concepts to reduce the searching space of the problem. An efficient algorithm for searching the least upper bounds of concept is given.

关键词： semantic Web fuzzy ontology fuzzy description logies fuzzy concept approximation