检索结果-南通市图书馆

Estimation of chloride Diffusivity in Hydrated Tricalcium Silicate Using a Hydration-Diffusion Integrated Method

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 49-64页

作者： WANG Xin shen Dejian TAO Sijie LIU Ruixin WU shengxing college of civil and Transportation Engineering Hohai UniversityNanjing 210098China

This study aims to develop a chloride diffusion simulation method that considers the hydration microstructure and pore solution properties during the hydration of tricalcium silicate(c3S).The method combines the hydration simulation,thermodynamic calculation,and finite element analysis to examine the effects of pore solution,including effect of electrochemical potential,effect of chemical activity,and effect of mechanical interactions between ions,on the chloride effective diffusion coefficient of hydrated c3S *** results indicate that the effect of electrochemical potential on chloride diffusion becomes stronger with increasing hydration age due to the increase in the content of hydrated calcium silicate;as the hydration age increases,the effect of chemical activity on chloride diffusion weakens when the number of diffusible elements decreases;the effect of mechanical interactions between ions on chloride diffusion decreases with the increase of hydration age.

关键词： tricalcium silicate simulation method chloride diffusion coefficient pore solution

Tuning the interfacial reaction environment via pH-dependent and induced ions to understand c–N bonds coupling performance in NO3- integrated cO2 reduction to carbon and nitrogen compounds over dual cu-based N-doped carbon catalyst

在线全文

学校读者我要写书评

暂无评论

Journal of Energy chemistry 2025年第1期100卷 273-285页

作者： Tianhang Zhou chen shen Zhenghao Wu Xingying Lan Yi Xiao college of carbon Neutrality Future Technology State Key Laboratory of Heavy Oil Processing China University of Petroleum (Beijing) Institute of Materials Science TU Darmstadt Department of chemistry Xi'an Jiaotong-Liverpool University Department of Mechanical and Mechatronics Engineering and Waterloo Institute of Nanotechnology University of Waterloo Waterloo

Dual atomic catalysts （DAc）,particularly c.p.er （cu2）-based nitrogen （N） doped graphene,show great potential to effectively convert cO2and nitrate （NO3-） into important industrial chemicals such as ethylene,glycol,acetamide,and urea through an efficient catalytical process that involves c–c and c–N ***,the origin of the coupling activity remained unclear,which substantially hinders the rational design of cu-based catalysts for the N-integrated cO2reduction reaction （cO2RR）.To address this challenge,this work performed advanced density functional theory calculations incorporating explicit solvation based on a cu2-based N-doped carbon (cu2N6c10) catalyst for *** calculations are aimed to gain insight into the reaction mechanisms for the synthesis of ethylene,acetamide,and urea via coupling in the interfacial reaction *** to the sluggishness of cO2,the formation of a solvation electric layer by anions （F-,cl-,Br-,and I-） and cations (Na+,Mg2+,K+,and ca2+) leads to electron transfer towards the cu *** process significantly accelerates the reduction of *** results reveal that*cO intermediates play a pivotal role in N-integrated ***,the cu2-based N-doped carbon catalyst examined in this study has demonstrated the most potential for c–N coupling to *** findings reveal that through the process of a condensation reaction between*cO and NH2OH for urea synthesis,*NO3-is reduced to*NH3,and*cO2to*ccO at dual cu atom *** dual-site reduction facilitates the synthesis of acetamide through a nucleophilic reaction between NH3and the ketene ***,we found that the I-and Mg2+ions,influenced by pH,were highly effective for acetamide and ammonia synthesis,exc.p. when F-and ca2+were ***,the mechanisms of c–N bond formation were investigated via ab-initio molecular dynamics simulations,and we found that adjusting the micro-environment can change the dominant side reaction,shift

关键词： condensation reactions

Synergistically enhanced ORR and HER performance on co-N-c coupled in-situ generated ptco intermetallic

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy chemistry 2025年第1期100卷 721-729页

作者： Guanyu Luo Min Song Lulu An Xiao Huang Qian Zhang chenhao Zhang Tao shen Shuang Wang Deli Wang Key Laboratory of Material chemistry for Energy conversion and Storage (Huazhong University of Science and Technology) Ministry of Education School of Chemistry and Chemical Engineering Huazhong University of Science and Technology

Integrating multi-scale sites in a composite catalyst is vital to realize efficient ***,a synergistic composite catalyst consisting of co atomic sites and in-situ generated ptco intermetallic compounds （IMcs）(o-ptco@coNc) is proposed through co pre-anchoring and subsequent impregnation-reduction *** loading of co atoms provides a chance for in-situ generating ptco ordered intermetallic *** remaining co single atoms and ptco IMcs construct synergistic electrocatalytic *** from the ordered structure,synergistic effect of pt co IMcs and co single atoms,o-ptco@coNc exhibits excellent electrocatalytic.p.rformance for oxygen reduction reaction （ORR） and hydrogen evolution reaction （HER） with mass activity of 1.21 A mgpt-1（at 0.9 V） and5.70 A mgpt-1（at an overpotential of 100 mV）,***,o-ptco@coNc delivers negligible loss of half-wave potential and overpotential during long-term stability test in acid solutions,with 13 mV decay after 50,000 potential cycles for ORR and a 2.7 mV decay after 20,000 potential cycles for *** integration strategy of single-atomic sites coupled IMcs paves the way for enhancing the activity and durability of pt-based electrocatalysts.

关键词： Synergistic effect Intermetallics Single atomic sites Oxygen reduction reaction Hydrogen evolution reaction

Localizing base stations with measured data:a concatenated image-based deep learning approach

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science china(Information Sciences) 2025年

作者： Yang cHEN Ziyuan LIU Feng JIANG Hong shen Wei XU Mengyu LI Ritao cHENG National Mobile communications Research Laboratory Southeast University china Mobile Group Design Institute co. Ltd.

Localization has become an indispensable function of modern cellular communication systems[1]. In a cloud radio access network （c-RAN）, the remote radio head （RRH） is the actual signal transmitter, whose location ...

关键词：

Evidence for the decays of ∧_c^+→∑^+η and ∑^+η’

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

chinese physics c 2019年第8期43卷 15-23页

作者： M.Ablikim F.F.An Q.An Y.Bai Y.Ban H.cai X.cai G.F.cao J.F.chang G.chen H.S.chen J.c.chen M.L.chen p.L.chen S.J.chen Y.B.chen W.cheng H.LDai J.p.Dai Z.Y.Deng Y.Ding c.Dong J.Dong L.Y.Dong M.Y.Dong Z.L.Dou S.X.Du p.F.Duan J.Z.Fan J.Fang S.S.Fang Y.Fang c.Q.Feng c.D.Fu Y.Fu Q.Gao X.L.Gao Y.Gao Y.G.Gao Z.Gao L.Gong W.X.Gong L.M.Gu M.H.Gu Y.T.Gu A.Q.Guo L.B.Guo R.p.Guo Y.p.Guo S.Han X.Q.Hao K.L.He Y.K.Heng Z.L.Hou H.M.Hu J.F.Hu T.Hu Y.Hu G.S.Huang J.S.Huang X.T.Huang X.Z.Huang Z.L.Huang Q.Ji Q.p.Ji X.B.Ji X.L.Ji X.S.Jiang X.Y.Jiang J.B.Jiao Z.Jiao D.p.Jin S.Jin Y.Jin X.S.Kang B.c.Ke c.Li cheng Li D.M.Li F.Li F.Y.Li G.Li H.B.Li H.J.Li J.c.Li J.W.Li Ke Li Lei Li p.L.Li p.R.Li Q.Y.Li T.Li W.D.Li W.G.Li X.L.Li X.N. Li X.Q.Li Z.B.Li H.Liang Y.F.Liang Y.T.Liang G.R.Liao L.Z.Liao c.X.Lin D.X.Lin B.Liu B.J.Liu c.X.Liu D.Liu D.Y.Liu F.H.Liu Fang Liu Feng Liu H.B.Liu H.L.Liu H.M.Liu Huanhuan Liu Huihui Liu J.B.Liu J.Y.Liu K.Liu K.Y.Liu Ke Liu Q.Liu S.B.Liu X.Liu Y.B.Liu Z.A.Liu Zhiqing Liu Y.F.Long X.c.Lou H.J.Lu J.D.Lu J.G.Lu Y.Lu Y.p.Lu c.L.Luo M.X.Luo T.Luo X.L.Luo X.R.Lyu F.c.Ma H.L.Ma L.L.Ma M.M.Ma Q.M.Ma X.N.Ma X.X.Ma X.Y.Ma Y.M.Ma Y.J.Mao Z.p.Mao Z.X.Meng J.Min T.J.Min X.H.Mo Y.J.Mo Z.Ning S.L.Niu S.L.Olsen Q.Ouyang Y.pan H.p.peng J.L.ping R.G.ping H.R.Qi M.Qi T.Y.Qi S.Qian c.F.Qiao N.Qin Z.H.Qin J.F.Qiu S.Q.Qu G.Rong W.Shan X.Y.Shan M.Shao c.p. shen p.X.shen X.Y.shen H.Y.sheng X.Shi J.J.Song X.Y.Song G.X.Sun J.F.Sun L.Sun S.S.Sun X.H.Sun Y.J.Sun Y.K.Sun Y.Z.Sun Z.J.Sun Z.T.Sun Y.T.Tan c.J.Tang G.Y.Tang X.Tang B.Wang B.L.Wang c.W.Wang D.Y.Wang Dan Wang K.Wang L.L.Wang L.S.Wang M.Wang Meng Wang p.Wang p.L.Wang W.p.Wang X.F.Wang Y.Wang Y.F.Wang Z.Wang Z.G.Wang Z.Y.Wang Zongyuan Wang D.H.Wei S.p.Wen L.H.Wu L.J.Wu Z.Wu L.Xia Y.Xia D.Xiao Y.J.Xiao Z.J.Xiao Y.G.Xie Y.H.Xie X.A.Xiong Q.L.Xiu G.F.Xu J.J.Xu L.Xu Q.J.Xu Q.N.Xu X.p.Xu F.Yan L.Yan w.B.Yan W.c.Yan Y.H.Yan H.J.Yang H.X.Yang L.Yang S.L.Yang Y.H.Yang Y.X.Yang Yifan Yang Z.Q.Yang M.Ye M.H.Ye J.H.Yin Z.Y.You B.X.Yu c.X.Yu J.S.Yu c.Z.Yuan Y.Yuan Y.Zeng B.X.Zhang B.Y.Zhang Institute of High Energy physics G.I.Budker Institute of Nuclear physics SB RAS(BINp) the Novosibirsk State University Helmholtz Institute Mainz Bochum Ruhr-University University of Turin INFN State Key Laboratory of particle Detection and Electronics University of Science and Technology of china Southeast University Joint Institute for Nuclear Research INFN Laboratori Nazionali di Frascati peking University Institute of physics and Technology Indiana University Bloomington carnegie Mellon University Johannes Gutenberg University of Mainz INFN Sezione di Ferrara Wuhan University Ankara University University of chinese Academy of Sciences Istanbul Bilgi University the Moscow Institute of physics and Technology the Functional Electronics Laboratory Tomsk State University University of South china Nanjing University Shanghai Jiao Tong University Key Laboratory for particle physics Astrophysics and CosmologyMinistry of EducationShanghai Key Laboratory for Particle Physics and CosmologyInstitute of Nuclear and Particle Physics Liaoning University Nankai University Zhengzhou University Tsinghua University University of Ferrara University of Eastern piedmont central china Normal University University of Minnesota Minneapolis GSI Helmholtzcentre for Heavy Ion Research GmbH Guangxi University Nanjing Normal University KVI-cART University of Groningen Henan Normal University University of Hawaii Honolulu Shandong University University of the punjab University of Muenster Uppsala University Huangshan college University of Jinan Justus-Liebig-Universitaet Giessen II.Physikalisches Institut Istanbul Arel University Soochow University Beijing Institute of petrochemical Technology china center of Advanced Science and Technology Sun Yat-Sen University Sichuan University Guangxi Normal University Indian Institute of Technology Madras Shanxi University Henan University of Science and Technology Lanzhou University Zhejiang University Fudan University Key Laboratory of Nuclear physics and Ion-beam Application(MOE)and Institute of

We study the hadronic decays of ∧c+ to the final states ∑+η and ∑+η’,using an e+e-annihilation data sample of 567 pb-1 taken at a center-of-mass energy of 4.6 GeV with the BESIII detector at the BEpcⅡ *** find evidence for the decays ∧c+→∑+η and ∑+η’ with statistical significance of 2.5σ and 3.2σ,*** to the reference decays ∧c+→∑+π0 and ∑+ω,we obtain the ratios of the branching fractions■and ■to be 0.35±0.16±0.02 and 0.86±0.34±0.04,*** upper limits at the 90% confidence level are set to be■and■.Using BESIII measurements of the branching fractions of the reference decays,we determine B（∧c+→∑+η）=（0.41±0.19±0.05）%（c+→∑+η’）=（1.34±0.53 ±0.19）%（certainties are statistical and the second *** obtained branching fraction of ∧c+→∑+η is consistent with the previous measurement,and the branching fraction of ∧c+→∑+η’ is measured for the first time.

关键词： charmed baryon ∧c^+ decays branching fractions

pROpERTIES OF W/cu FGMs cONTAINING 1%Tic OR 1%La_2O_3 pREpARED USING GSUHp

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2007年第1期20卷 59-64页

作者： K. Zhang W.p. shen c.c. Ge Laboratory of Special ceramics and powder Metallurgy University of Science and Technology Beijing Beijing 100083 China

W/ cu functionally gradient materials （FGMs） containing 1% La2O3 and 1% Tic were prepared using graded sintering under tdtra-high pressure （GSUHp）. The specimens have been found to exhibit low porosity （11.57% and 11.35%, respectively）. Shearing strength of the specimens between layers is good. Moreover, the specimens have still demonstrated good performance in testing thermal-shock resistance. When power density of laser is 200MWm^-2, the specimens have been tested for thermal-shock resistance （1000 times）; the specimens that contained 1%La2O3 were not subjected to damage, whereas those that contained 1%Tic began to crack. Finally, effect of additives on thermal-shock resistance was also preliminarily discussed.

关键词： W/cu FGMs (functionally gradient materials) GSUHp (graded sintering under ultra-high pressure) shearing strength, thermal-shock resistance

FINITE ELEMENT ANALYSIS OF AXIAL FEED BAR ROLLING

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2007年第6期20卷 463-468页

作者： c.G. Xu G.H. Liu G.S. Ren Z. shen c.p. Ma W. W. Ren Beijing Research Institute of Mechanical and Electrical Technology Beijing 100083 China

A flexible technique of hot working of bars by axial feed rolling was introduced. The process deformation, strain field, stress field, and temperature fie M of the parts are analyzed by finite element method （ FEM）-... 详细信息

关键词： axial feed bar rolling deformation FEM (finite element method) stress field strain feld, temperature field

Effects of Mixing Volume and Initial particle Size Distribution of Fly Ash on pore Solution of cement paste

在线全文

学校读者我要写书评

暂无评论

武汉理工大学学报 2010年第17期32卷 112-116页

作者： SHUI Z H DUAN p shen c H School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070China center of Materials Research and Analysis Wuhan University of TechnologyWuhan 430070China

The effects of fly ash with different mixing volume and different particle sizes on pore solution of cement-based materials were studied. The pore solution was extracted by squeezing at scheduled ages. The particle size distribution of fly ash was classified as smaller than 45 μm and 45～80 μm,and the mixing volume was classified as 10% and 20%. The concentrations of K+,Na+ and ca2+ were measured using Inductively coupled plasma Emission Spectrometer (Icp),and the pH was measured by acid-base titration. The results indicate that the concentrations of various ions were prompted at the initial time of the hydration. With further hydration,ion concentrations of K+ and Na+ raise again and finally stabilized,but there is a certain decline on ca2+ later on. It also shows that fly ash exhibited great effect on the hydration of cement,it can lower the concentration of ca2+ and pH of the pore solution,but raise the concentrations of K+ and Na+. More importantly,ion concentrations of K+,Na+ and ca2+ reduced with smaller particle sizes of fly ash.

关键词： cement-based materials pore solution ion concentration squeeze

数字克隆人:“跨媒介—交互”中的数字沉浸性研究——基于容积视频捕获技术的探讨

在线全文

学校读者我要写书评

暂无评论

东北师大学报（哲学社会科学版） 2025年第1期 154-162页

作者：沈嘉熠温凯华东师范大学传播学院上海200241

容积视频捕获(Volumetric Video)是通过光学扫描来捕捉拍摄对象并生成动静两态4D数字影像模型的前沿机器视觉技术之一。与现有的虚拟数字人不同,它生成的数字克隆人是对真人一比一的真实呈现,故而数字克隆人所具有的视觉情感与叙事场景... 详细信息

容积视频捕获(Volumetric Video)是通过光学扫描来捕捉拍摄对象并生成动静两态4D数字影像模型的前沿机器视觉技术之一。与现有的虚拟数字人不同,它生成的数字克隆人是对真人一比一的真实呈现,故而数字克隆人所具有的视觉情感与叙事场景于受众而言具有更深刻的沉浸性。本文从数字克隆人的生成逻辑、技术特性出发,深挖其背后生发的感知体验与情感投射,通过跨媒介叙事分析,结合实验室成果探索其沉浸意境与实践意义,揭示数字克隆人在经历“生产—创造”的过程后将客观形态和主观感性融合在一起,冲破了人与技术、人与审美、人与群体的边界,在虚拟世界中转化为现实的仿真。

关键词：沉浸体验交互叙事容积视频捕获数字克隆人