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理论探索二维X_(2)UO_(4)(X=K,Rb,Cs)的力学特征、电子结构和声子输运特征

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原子与分子物理学报 2025年第2期42卷 143-150页

作者：程钧湖北医药学院研究生院十堰442000

本文用基于密度泛函理论的第一性原理计算方法,研究了三种建议的二维材料X_(2)UO_(4)(X=K,Rb,Cs)的稳定性、弹性、电子结构和声子振动特性.计算结果显示,三种材料同时具备较好的热力学、动力学和机械稳定性.电子结构表明,三种材料属于... 详细信息

本文用基于密度泛函理论的第一性原理计算方法,研究了三种建议的二维材料X_(2)UO_(4)(X=K,Rb,Cs)的稳定性、弹性、电子结构和声子振动特性.计算结果显示,三种材料同时具备较好的热力学、动力学和机械稳定性.电子结构表明,三种材料属于宽禁带间接半导体,其计算能隙分别是3.90、3.79和3.42 eV,并且在300 K时有着71.31-174.23 cm^(2)/Vs的电子迁移率.声子输运特性表明,三种材料的声子色散均没有虚频出现,声学模和低频光学模呈现强烈耦合,且有着低频率low-lying声子,这使得材料具备很强的声子非谐效应、低声子群速度和强声子散射率,从而表现出很低晶格热导率,在300 K温度下时仅为0.16-0.19 W/mK.这些特性表明,二维X_(2)UO_(4)(X=K,Rb,Cs)在纳米电子和热电器件领域具备应用潜力.

关键词：二维材料能带迁移率声子热导率

Moment Redistribution Effect of the Continuous Glass Fiber Reinforced Polymer-Concrete Composite Slabs Based on Static Loading Experiment

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Structural Durability & Health Monitoring 2025年第1期19卷 105-123页

作者： Zhao-Jun Zhang Wen-Wei Wang Jing-Shui Zhen Bo-cheng Li De-cheng Cai Yang-Yang Du Hui Huang Offshore Oil Engineering Co.Ltd. Tianjin300461China Department of Bridge Engineering School of TransportationSoutheast UniversityNanjing211189China

This study aimed to investigate the moment redistribution in continuous glass fiber reinforced polymer(GFRP)-concrete composite slabs caused by concrete cracking and steel bar yielding in the negative bending moment *** experimental bending moment redistribution test was conducted on continuous GFRP-concrete composite slabs,and a calculation method based on the conjugate beam method was *** composite slabs were formed by combining GFRP profiles with a concrete layer and supported on steel beams to create two-span continuous composite slab *** methods,epoxy resin bonding,and stud connection,were used to connect the composite slabs with the steel *** experimental findings showed that the specimen connected with epoxy resin exhibited two moments redistribution phenomena during the loading process:concrete cracking and steel bar yielding at the internal *** contrast,the composite slab connected with steel beams by studs exhibited only one-moment redistribution phenomenon throughout the loading *** the concrete at the internal support cracked,the bending moment decreased in the internal support section and increased in the midspan *** the steel bars yielded,the bending moment further decreased in the internal support section and increased in the mid-span *** GFRP profiles do not experience cracking,there was no significant decrease in the bending moment of the mid-span *** test specimens experienced compressive failure of concrete at the mid-span *** results showed good agreement between the calculated and experimental values of bending moments in the mid-span section and internal support *** proposed model can effectively predict the moment redistribution behavior of continuous GFRP-concrete composite slabs.

关键词： Moment redistribution GFRP-concrete composite slabs bending moment experimental study analysis model

A Novel and Simple Molecular Probe Sensing Hg（II） in Living Cells by Chelation-enhanced Fluorescence

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Chinese Journal of Chemistry 2012年第2期30卷 249-253页

作者： Meng,Qinghua cheng,Sen lan,Minbo Wei,Gang School of Chemistry&Chemistry Engineering Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Key Laboratory of Functional Materials Chemistry East China University of Science and TechnologyShanghai 200237China CSIRO Materials Science and Engineering P.O.Box 218LindfieldNSW 2070Australia

Mercury is currently widely used in industries which leads to various means of Hg（II） waste exposure and its accumulation in organisms will cause neurological damages. Thus, there is a great need for the design of probes or sensors with high sensitivity and selectivity for detecting and monitoring Hg（II） at physiological pH. Thus a novel and simple molecular probe P1 was prepared from 1,1＇-（1,3-phenylene）-bis（2,4-pentanedionato） for sensing Hg（II） via chelation-enhanced fluorescence （CHEF） mechanism. The probe indicated a selectively fluorescent response to Hg（II） in aqueous media excited by the ultraviolet light of 254 nm. The recognition mechanism was further studied by semi-empirical AM1 and molecular mechanics MM＋ methods in HyperChem 8.0. The calculation indicated a tetrahedron coordination geometry for Hg（II） and a chair-like configuration for the total molecule. The fluorescent images sensing Hg（II） in living mouse fibroblast cells by the probe were obtained by fluorescence microscope.

关键词： mercury probe semirigid chelation-enhanced fluorescence (CHEF) fluorescent image

A 3D-printed Robot Hand with Three Linkage-driven Underactuated Fingers

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International Journal of Automation and computing 2018年第5期15卷 593-602页

作者： Xia-Li Li Li-cheng Wu Tian-Yi lan School of Information Engineering Minzu University of China

In this study, we improved an underactuated finger mechanism by using Solidworks to simulate the grasp operation of a finger in some different situations. In addition, a robot palm is designed for the three-finger robot hand with the designed underactuated fingers. A Solidworks simulation was used to verify the rationality of the design. Some parts of the hand were modified to fit for 3D printing, and a prototype of the hand was produced by 3D printing, which could reduce the cost of the production process, as well as provide design flexibility and other advantages. Finally, some grasping experiments were made with the prototype. The results showed that the robot could grasp objects with different sizes, and further verified the rationality of the design and feasibility of fabricating the robot hand using 3D printing.

关键词： Mechanical finger three-finger robotic hand underactuation grasping simulation Solidworks.

Factors Influencing Formation of Sclerotia in Grifola umbellate （Pers.） Pilaet Under Artificial Conditions

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Journal of Integrative Plant Biology 2006年第11期48卷 1312-1317页

作者： Xian-Hao cheng Shun-Xing Guo Chun-lan Wang Laboratory of Medicinal Fungi Institute of Medicinal Plants Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100094 China

The effects of substrate composition and temperature on myceilal growth and sclerotium production in Grlfola umbellate （Pers.） Pilaet were Investigated In the present study. The Induction of sclerotla of G. umbellate was affected greatly by the type of medium, as well as the type of carbon source. Malt-extract agar was able to induce the production of sclerotia. The production of sclerotia was also observed when the carbon source in the GPC agar medium （glucose 20 g/L, peptone 6 g/L, corn steep liquor 10 g/L, and agar 15 g/L） was replaced with glycerol or mannitol. Altering the composition of the GPC medium with milk powder, thiamine hydrochlorlde, extract of Armlllarla mellea, active clay, dlatomite, kaolin, or arginlne did not induce the production of sclerotla. A temperature range of 18-25 ℃ was suitable for both mycellai growth and sclerotium formation. Glycerol significantly Induced slerotium formation on nutrient supplemented with sawdust substrates In bottle culture. 24S-Polyporusterone A and polyporusterone B were assayed In samples of natural and cultured sclerotla. Both natural and cultured sclerotla contained 24S- polyporusterone A and polyporusterone B.

关键词： carbon sources glycerol Grifola umbellate mannitol polyporusterone, sclerotia.

Preparation of In_2O_3-Sr_2RuErO_6 Composite Ceramics by the Spark Plasma Sintering and Their Thermoelectric Performance

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Journal of Materials Science & Technology 2011年第12期27卷 1165-1168页

作者： Bo cheng Yuanhua Lin Jinle lan Yong Liu Cewen Nan State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and Engineering Tsinghua University Beijing 100084 China School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 Ch.ina

Inl.9aZn0.03Ge0.0303 and Sr2RuEr06 composite ceramics have been prepared by the spark plasma sintering （SPS） technique. Microstructure studies show that the Sr2RuErO6 phases are randomly dispersed in the In1.94Zn0.03Ge0.03O3 matrix. The results show that the Seebeck coefficient increases with increasing the amount of Sr2RuErO6, while the thermal conductivity of the composite samples is lower than that of the Inl.9aZno.03Ge0.03O3 ceramic. The thermal conductivity of the 7 vol.% Sr2RuErO6 sample can decrease to 2.15 W.m-1.K-1 at 973 K, and the evaluated maximum ZT value is 0.23 for 3 vol.% Sr2RuErO6 samples at 973 K, which makes them promising materials for the thermoelectric devices.

关键词： Indium oxide Double perovskite Thermoelectric performance Composite

A new type of micro-disseminated gold deposits in association with diabase found in Yunnan and Guizhou provinces and Guangxi Zhuang Autonomous Region——Their geological characteristics and metallogenic conditions

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Chinese Journal Of Geochemistry 2012年第4期31卷 449-456页

作者： LI Zhuyun lan Tianlong RAN Ruide cheng Guofan No. 105 Geological Team Guizhou Provincial Bureau of Geology and Mineral Resources Guiyang 550018 China No. 103 Geological Team Guizhou Provincial Bureau of Geology and Mineral Resources Tongren 554300 China Guizhou Provincial Geology and Mineral Resources Exploration and Development Corporation Guiyang 550004 China

With the continuous development of gold ore prospecting and exploration in recent years a new type of micro-disseminated gold deposits have been found in the regions of Southwest Guizhou Province and Northwest Guangxi Zhuang Autonomous Region,with the orebodies directly occurring in diabase or in the contact zone between diabase and *** orebodies are strictly controlled by fault *** discovery of this type of gold deposits has brought about new prospects for gold ore prospecting in the Yunnan-Guizhou-Guangxi Golden Triangle *** the preliminary analysis of the geological characteristics of the Qiaoxiang gold deposit in Wangmo County,in combination with the results of research work in the adjacent areas in recent years,this paper roughly described the geological characteristics and metallogenic conditions of this type of gold ore deposits with an attempt to make more and more geologists pay enough attention to this type of gold ore deposits,so as to promote gold ore prospecting in Guizhou Province to develop toward a variety of types of gold deposits in all round way.

关键词：微细浸染型金矿床广西壮族自治区成矿地质条件地质特征辉绿岩贵州省类型云南

The evolution of the spatial public goods game with patience in mutual punishment 36

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The evolution of the spatial public goods game with patience...

Investigation of trace elements in Guangxi ancient pottery by INAA

第36届中国控制会议

作者： Ting lan Lei cheng School of Information Science and Engineering Wuhan University of Science and Technology

ISBN: (纸本)9781538629185

There exists a patience when we treat everyone or anything around us in real *** on mutual punishment,in order to study the evolution of cooperation in spatial public goods game in the presence of patience in each individual,we introduce patience in this *** each cooperator has a patience and patience is changed after the execution of each game,when payoff of cooperator is always less than public expectation,cooperator’s patience is exceeded,cooperator will choose to *** the simulation,we find that multiplication factor r is fixed,the higher the value of the public expectation E is,the lower the fraction of cooperation fc *** when public expectation value is certain,the greater the multiplication factor is,the more it can promote the evolution of ***,the influence of two critical values r,r and system size on system is also studied.

关键词： Spatial public goods game cooperation the public expectation patience

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Nuclear Science and Techniques 1997年第1期8卷 33-37页

作者： PengZi－cheng Yun－lan 等 DepartmentofEarthandSpaceScience StructureResearchLaboratory UniversityofScienceandTechnologyofChina

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关键词：中子激活分析古代陶瓷示踪元素