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Rare Metals 2024年第2期43卷 511-521页

作者： jian-Peng Sun Yu Zheng zi-Sheng Zhang Xiang-Chao Meng zi-Zhen Li Key Laboratory of Marine Chemistry Theory and Technology(Ministry of Education) College of Chemistry and Chemical EngineeringOcean University of ChinaQingdao266100China Shanxi Institute of Energy Taiyuan030600China Department of Chemical and Biological Engineering Faculty of EngineeringUniversity of OttawaOttawaONK1N6 N5Canada

Herein,a novel single-atomic Pt doping and interface-rich CoS/Co(OH)_(2)(Pt-CoS/Co(OH)_(2)/C)electrocatalyst has been successfully *** from precise regulation of d-orbital electronic structure modulation on Co site,Pt-CoS/Co(OH)_(2)/C exhibited remarkable HER activity and high stability for hydrogen evolution in splitting both water(73 mV@10 mA·cm^(−2)) and seawater(87 mV@10 mA·cm^(−2)).Notably,atomic Pt doping was introduced into CoS/Co(OH)_(2),which could produce local unbalanced Coulombic force and significantly increased the number of S vacancies,and then expose abundant Co ***,Co(OH)_(2) in Pt-CoS/Co(OH)_(2)/C could act as the adsorption sites for H_(2)O in hydrogen evolution reaction *** functional theory results also proved that atomic Pt doping,S vacancies and Co(OH)_(2) coupling could result in the formation of enriched electronic Co sites and optimize d_(z2) orbital electronic structure,and then realize the depth upward shift of d-band center and enhance the adsorption of H*on Co sites.

关键词： Electrocatalysts Hydrogen evolution reaction Pt-CoS/Co(OH)_(2) d-band center Electronic structure Water/seawater electrolysis

THEORETICAL PREDICTION OF MELTING TEMPERATURE FOR SILICON

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Chinese Physics Letters 1990年第1期7卷 24-27页

作者： zi jian ZHANG Kaiming XIE Xide Physics Department Fudan UniversityShanghai 200433

A dynamical calculation of the state equation is presented to give a good prediction of the melting temperature for silicon which is much better than the molecular dynamics simulation result and agrees satisfactorily ... 详细信息

关键词： MELTING prediction satis

LATTICE DYNAMICS OF STRAINED Si/Ge SUPERLATTICES

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Chinese Physics Letters 1990年第5期7卷 230-233页

作者： zi jian ZHANG Kaiming XIE Xide Physics Department Fudan UniversityShanghai 200433

Lattice dynamics of strained(Si)_(4)/(Ge)_(4) superlattice grown pseudomorphically on (001)-oriented Si_(1-x)Ge_(x)(0≤x≤1)substrate is *** the present calculations,the effects of strain and substrate are discussed.

关键词： Si/Ge strained SUPER

Optimization of Ethylene Glycol Doped PEDOT:PSS Transparent Electrodes for Flexible Organic Solar Cells by Drop-coating Method

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Chinese Journal of Polymer Science 2019年第8期37卷 760-766页

作者： Hui-Qin Cui Rui-Xiang Peng Wei song jian-Feng Zhang Jia-Ming Huang Li-Qiang Zhu zi-Yi Ge Faculty of Materials Science and Chemical Engineering Ningbo University Ningbo 315211 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing 100049 China

Fabrication of flexible transparent electrodes(FTEs) is one of the core technologies in the field of flexible electronics. Among multiple choices of FTEs, poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonic acid)(PEDOT:PSS) has shown its promising application in roll-to-roll manufacturing. A simple yet effective method for substantially boosting the conductivity of these conducting polymer films without causing large-domain aggregations is by adding ethylene glycol(EG) as dopant. Herein, we investigated in detail the effects of the secondary solvent of ethylene glycol(EG) on the optical and electrical characteristics of PEDOT:PSS films. The modified PEDOT:PSS FTEs were deposited using drop-coating techniques as it had greater compatibility for large-area samples than the conventional spin-coating method did. The 6% EG-doped PEDOT:PSS FTE via drop-coating method achieved a high figure of merit(FoM) value of 47.24 and the devices fabricated using the optimal PEDOT:PSS FTE yielded a high power conversion efficiency(PCE) of 8.89%, mostly attributed to the modified PEDOT:PSS films that had excellent optical and electrical characteristics with low surface roughness. These results suggested that EG-doping could effectively boost the conductivity of PEDOT:PSS films and that the modified PEDOT:PSS FTE is suitable for roll-to-roll manufacturing in the future.

关键词： PEDOT:PSS Doping Conductivity Flexible transparent electrodes Organic solar cells

SPDEs with Colored Gaussian Noise: A Survey

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Communications in Mathematics and Statistics 2018年第4期6卷 481-492页

作者： jian song School of Mathematics Shandong UniversityJinan 250100ShandongPeople’s Republic of China

This note reviews and discusses some recent results on linear stochastic partial differential equations with multiplicative Gaussian noise colored in time.

关键词： Stochastic partial differential equations Malliavin Calculus Large deviation Lyapunov exponent

Analysis of the Heat Transfer Efficiency of an Automobile Engine under Different Grille Opening and Closing Conditions

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Fluid Dynamics & Materials Processing 2022年第2期18卷 345-354页

作者： jian song College of New Energy Vehicles Jingzhou Institute of TechnologyJingzhou434020China

Computational Fluid Dynamics is used to assess the thermal(heat transfer)performances of an automobile engine considering different grille opening and closing *** this purpose the entire vehicle is modelled and three fundamental aspects are examined,namely,the open area of the air intake grille,the position of the upper and lower grilles and their *** results show that the opening area and position of the grille have some influence also on the aerodynamic characteristics of the *** an increase in the opening angle of the grille,the CD(Drag Coefficient)value of the whole vehicle becomes *** the air intake grille of the car is fully open or closed,the CD value is 0.35434 or 0.31777,respectively,that is,the flow resistance in the engine compartment accounts for 10.32%of the CD value for the whole automobile.

关键词： Air intake grille opening and closing degree automobile engine heat transfer function simulation and optimization

Asymptotic Behavior of Soliton Solutions with a Double Spectral Parameter for Principal Chiral Field

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Communications in Theoretical Physics 2005年第6X期44卷 977-980页

作者： song Quan-Fu ZHOU zi-Xiang School of Mathematical Sciences Fudan University Shanghai 200433 China

The soliton solutions with a double spectral parameter for the principal chiral field are derived by Darboux transformation. The asymptotic behavior of the solutions as time tends to infinity is obtained and the speed... 详细信息

关键词： principal chiral field asymptotic solutions

Effect of grain boundary on the mechanical behaviors of irradiated metals: a review

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Science China(Physics,Mechanics & Astronomy) 2016年第6期59卷 24-34页

作者： Xia zi Xiao Hai jian Chu Hui Ling Duan State Key Laboratory for Turbulence and Complex System Department of Mechanics and Engineering Science College of EngineeringPeking University HEDPS Center for Applied Physics and Technology Peking University Department of Mechanics and Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai University

The design of high irradiation-resistant materials is very important for the development of next-generation nuclear reactors. Grain boundaries acting as effective defect sinks are thought to be able to moderate the deterioration of mechanical behaviors of irradiated materials, and have drawn increasing attention in recent years. The study of the effect of grain boundaries on the mechanical behaviors of irradiated materials is a multi-scale problem. At the atomic level, grain boundaries can effectively affect the production and formation of irradiation-induced point defects in grain interiors, which leads to the change of density, size distribution and evolution of defect clusters at grain level. The change of microstructure would influence the macroscopic mechanical properties of the irradiated polycrystal. Here we give a brief review about the effect of grain boundaries on the mechanical behaviors of irradiated metals from three scales: microscopic scale, mesoscopic scale and macroscopic scale.

关键词： mechanical behaviors irradiation effect grain boundary multi-scale modeling

Bayesian networks modeling for thermal error of numerical control machine tools

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第11期9卷 1524-1530页

作者： Xin-hua YAO jian-zhong FU zi-chen CHEN College of Mechanical and Energy Engineering Zhejiang University Hangzhou 310027 China Zhejiang Provincial Key Lab of Advanced Manufacturing Technology Hangzhou 310027 China

The interaction between the heat source location, its intensity, thermal expansion coefficient, the machine system configuration and the running environment creates complex thermal behavior of a machine tool, and also makes thermal error prediction difficult. To address this issue, a novel prediction method for machine tool thermal error based on Bayesian networks (BNs) was presented. The method described causal relationships of factors inducing thermal deformation by graph theory and estimated the thermal error by Bayesian statistical techniques. Due to the effective combination of domain knowledge and sampled data, the BN method could adapt to the change of running state of machine, and obtain satisfactory prediction accuracy. Ex- periments on spindle thermal deformation were conducted to evaluate the modeling performance. Experimental results indicate that the BN method performs far better than the least squares (LS) analysis in terms of modeling estimation accuracy.

关键词： Bayesian networks (BNs) Thermal error model Numerical control (NC) machine tool

A Study on the Recovery and Classification of Meteorites from the Mt. Grove Region of Antarctica

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Chinese Journal of Astronomy and Astrophysics 2004年第2期4卷 166-175页

作者： jian-ZhongLiu Yong-LiaoZou Chun-LaiLi LinXu zi-YuanOuyang NationalAstronomicalObservatories ChineseAcademyofSciencesBeijing100012 InstituteofGeochemistry ChineseAcademyofSciencesGuiyang550002

The Antarctic Continent has become the largest natural preservatory of meteorites in the world because of its unique geographical position and climatic conditions. Mt. Grove is located in the inland area of the Antarctic Continent where the conditions are favorable for the preservation of meteorites. During China's 15th, 16th and 19th Antarctic Scientific Explorations a large number of meteorites were recovered in the Mt. Grove region. Especially during the 19th Exploration in 2002/03 a total of 4448 meteorites were recovered, which at one stroke put China among countries that have recovered most numbers of meteorites. Here, we report mainly the results of microscope and electron microprobe studies of 28 meteorites recovered during the 16th Exploration. The meteorites are chemically classified based on their mean Fa contents of olivine, mean Fs contents of low-Ca pyroxene and abundances of Fe-Ni metal. We also give a brief account of the meteorite recovery during the three Explorations and of some preliminary classification results of the Antarctic meteorites.

关键词： Earth - meteorites