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Journal of Iron and Steel Research International 2018年第8期25卷 813-820页

作者： Juan Cheng Yan-xin Wu Yang Wang Jian-xun fu Materials Genome Institute and State Key Laboratory of Advanced Special Steel and School of Materials Science andEngineering Shanghai University Shanghai 200444 China

The triangular zone cracks in 2101 duplex stainless steel produced by the vertical continuous caster have troubled company A for a long time. To simulate the temperature and thermal stress distributions in the solidification process of 2101 duplex stainless steel produced by the vertical continuous caster, a two-dimensional viscoelastic-plastic thermomechanically coupled finite element model was established by the secondary development of the commercial nonlinear finite element analysis software MSC Marc. The results show that the thermal stress on the surface reaches a maximum at the exit of the mould, and the highest thermal stresses at the centre of the wide face and the narrow face are 75 and 115 MPa, respectively. Meanwhile, the internal temperature of slab is still higher than the solidus temperature, resulting in no thermal stress. The slab shows different high-temperature strengths and suffers from different stresses at different positions; thus, the risk of cracking also varies. At a location of 6-8 m from the meniscus, the temperature of the triangular zone is 1270-1360℃ and the corresponding permissible high-temperature strength is about 10-30 MPa, while the thermal stress at this time is 60 MPa, which is higher than the high-temperature strength. As a result, triangular zone cracks form easily.

关键词： Vertical continuous caster Triangular zone crack Thermomechanical coupling Viscoelastic-plastic model -Finite element analysis

Effect of enamel top coating on oxidation behavior of multi-arc ion plating NiCrAlY coating in oxygen containing water vapor

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中国有色金属学会会刊：英文版 2004年第Z1期14卷 446-450页

作者： XIE Dong-bai ZHU Sheng-long WANG fu-hui State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Science Shenyang 110016 China State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Science Shenyang 110016 China State Key Laboratory for Corrosion and Protection Institute of Metal Research Chinese Academy of Science Shenyang 110016 China

The oxidation behavior of Ni-Cr-Al-Y coating produced by multi-arc ion plating with and without an enamel coating was investigated in flow oxygen and oxygen containing water vapor at 900 ℃. The results show that Ni-Cr-Al-Y coating exhibits low oxidation rate at 900 ℃ in pure oxygen and the oxidation kinetics follow the parabolic rate law. The presence of water vapor accelerates the oxidation rate of Ni-Cr-Al-Y coating and K38G *** enamel top coating is very effective in protecting the Ni-Cr-Al-Y coating from water vapor corrosion attack, but the corrosion attack beneath the enamel coating is not observed.

关键词： water vapor enamel coating Ni-Cr-Al-Y coating oxidation

Energy loss of tens keV charged particles traveling in the hot dense carbon plasma

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Science China(Physics,Mechanics & Astronomy) 2016年第8期59卷 65-72页

作者： ZhenGuo fu ZhiGang Wang Bin He DaFang Li Ping Zhang Center for fusion Energy Science and Technology Chinese Academy of Engineering Physics Beijing 100088 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China

The energy loss of charged particles, including electrons, protons, and α-particles with tens keV initial energy E0, traveling in the hot dense carbon(C) plasma for densities from 2.281 to 22.81 g/cm3 and temperatures from 400 to 1500 eV is systematically and quantitatively studied by using the dimensional continuation method. The behaviors of different charged particles are readily distinguishable from each other. Firstly, because an ion is thousands times heavier than an electron, the penetration distance of the electron is much longer than that of proton and α-particle traveling in the plasma. Secondly, most energy of electron projectile with E0 function of the plasma density is fitted, and different behaviors of each projectile particle can be clearly found from the fitted *** believe that with the advanced progress of the present experimental technology, the findings shown here could be confirmed in ion-stopping experiments in the near future.

关键词： stopping power BPS model inertial confinement fusion dense plasmas

Fault diagnosis of high-speed train bogie based on LSTM neural network

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Science China(Information Sciences) 2021年第1期64卷 260-262页

作者： Deqing HUANG Yuanzhe fu Na QIN Shibin GAO Institute of System Science and Technology Southwest Jiaotong University National Rail Transit Electrification and Automation Engineering Technique Research Center Southwest Jiaotong University

Dear editor,With the extensive implementation of high-speed railway acceleration,higher requirements for safety and stability are put *** order to guarantee the safety of the highspeed train (HST),it is critical to detect the abnormal state in *** that plays an important role in reducing vehicle vibration is connected to the track and the train body,and its health condition directly affects the safe operation of train.

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One-pot synthesis and optical properties of In- and Sn-doped ZnO nanoparticles

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International Journal of Minerals,Metallurgy and Materials 2017年第4期24卷 455-461页

作者： Li-ping Wang fu Zhang Shuai Chen Zi-heng Bai Department of Materials Physics and Chemistry School of Materials Science and Engineering University of Science and Technology Beijing Beijing 100083 China

Colloidal indium-doped zinc oxide (IZO) and tin-doped zinc oxide (ZTO) nanoparticles were successfully prepared in organic solution, with metal acetylacetonate as the precursor and oleylamine as the solvent. The crystal and optical properties were characterized by X-ray diffraction, UV−visible spectrophotometry, and fluorescence spectroscopy, respectively; the surface and structure morphologies were observed by scanning electron microscopy and transmission electron microscopy. The XRD patterns of the IZO and ZTO nanoparticles all exhibited similar diffraction peaks consistent with the standard XRD pattern of ZnO, although the diffraction peaks of the IZO and ZTO nanoparticles were slightly shifted with increasing dopant concentration. With increasing dopant concentration, the fluorescent emission peaks of the IZO nanoparticles exhibited an obvious red shift because of the difference in atomic radii of indium and zinc, whereas those of the ZTO nanoparticles exhibited almost no shift because of the similarity in atomic radii of tin and zinc. furthermore, the sizes of the IZO and ZTO nanoparticles distributed in the ranges 20–40 and 20–25 nm, respectively, which is attributed to the difference in ionic radii of indium and tin. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.

关键词： Crystal structure Doping (additives) Electron microscopy Fluorescence Fluorescence spectroscopy High resolution transmission electron microscopy Indium Metal nanoparticles Nanoparticles Optical properties Scanning electron microscopy Semiconductor doping Tin Tin oxides Transmission electron microscopy X ray diffraction Zinc Zinc oxide

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钻探技术在地质勘察工程中的应用探讨

世界有色金属 2018年第5期43卷 287-287,289页

作者：付文靖广州地质勘察基础工程公司广东广州510030

随着我国经济的不断发展,我国的地质勘察事业得到了快速的发展,而在地质勘察的工程之中,钻探技术发挥的作用也越来越重要了,因为钻探技术具有非常准确的分析能力,因此它也成了地质勘察最为重要的手段。本文对工程勘察钻探工作进行了以... 详细信息

随着我国经济的不断发展,我国的地质勘察事业得到了快速的发展,而在地质勘察的工程之中,钻探技术发挥的作用也越来越重要了,因为钻探技术具有非常准确的分析能力,因此它也成了地质勘察最为重要的手段。本文对工程勘察钻探工作进行了以下的分析,阐明了钻探技术在地质勘察工程之中的运用。

关键词：钻探技术地质勘察工程应用

Simulation of two-dimensional ISAR decoys on a moving platform

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Journal of Systems Engineering and Electronics 2015年第2期26卷 250-257页

作者： Xiaoyi Pan Wei Wang Qixiang fu Dejun Feng Guoyu Wang State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System National University of Defense Technology

It is potentially useful to perform deception jamming using the digital image synthesizer （DIS） since it can form a two-dimensional （2D） decoy but suffers from multiple decoys ge- neration. Inspired by the intermittent sampling repeater jamming （ISRJ）, the generation of inverse synthetic aperture radar （ISAR） decoys is addressed, associated with the DIS and the ISRJ. Radar pulses are sampled intermittently and modulated by the scatter- ing model of a false target by mounting the jammer on a moving platform, and then the jamming signals are retransmitted to the radar and a train of decoys are induced after ISAR imaging. A scattering model of Yak-42 is adopted as the false-target mo- dulation model to verify the effectiveness of the jamming method based on the standard ISAR motion compensation and image for- mation procedure.

关键词： inverse synthetic aperture radar(ISAR) digital image synthesizer(DIS) intermittent sampling decoys

Three-dimensional analysis of relationship between relative orientation and motion modes

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Chinese Journal of Aeronautics 2014年第6期27卷 1495-1504页

作者： Fan Shijie Fan Hongqi Xiao Huaitie Fan Jianpeng fu Qiang ATR Key Laboratory National University of Defense Technology College of Electronic Science and Engineering National University of Defense Technology

Target motion modes have a close relationship with the relative orientation of missile-totarget in three-dimensional highly maneuvering target interception. From the perspective of relationship between the sensor coordinate system and the target body coordinate system, a basic model of sensor is stated and the definition of relative angular velocity between the two coordinate systems is introduced firstly. Then, the three-dimensional analytic expressions of relative angular velocity for different motion modes are derived and simplified by analyzing the influences of target centroid motion, rotation around centroid and relative motion. Finally, the relationships of the relative angular velocity directions and values with motion modes are discussed. Simulation results validate the rationality of the theoretical analysis. It is demonstrated that there are significant differences of the relative orientation in different motion modes which include luxuriant information about motion modes. The conclusions are significant for the research of motion mode identification,maneuver detection, maneuvering target tracking and interception using target signatures.

关键词： Attitude analysis Coordinate system Motion mode Relative angular velocity Sensor Terminal guidance

Special issue on electrochemical conversion and utilization of hydrogen energy

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Frontiers in Energy 2024年第3期18卷 263-264页

作者： Yun ZHENG Bo YU Xiaogang fu Jiujun ZHANG Institute of New Energy Materials and Engineering School of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China State Key Laboratory of Solidification Processing Atomic Control&Catalysis Engineering LaboratorySchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China

The concerns over energy crisis and climate change caused by the excessive consumption of fossil fuels and the associated emission of greenhouse gases, have driven many countries to develop policies for an energy transition into zero-carbon energy sources, essentially aiming at decarbonizing their energy systems. Among various renewable sources, hydrogen has been hailed as an ideal alternative to provide secure, cost-effective, and non-polluting energy. In recent years, there has been noteworthy progress in hydrogen electrochemical conversion and utilization techniques and devices, including water electrolyzers, proton-exchange membrane fuel cells (PEMFCs), solid oxide fuel cells (SOFCs), etc. Each of these technologies has yielded a series of encouraging advances. To showcase these recent advances, Frontiers in Energy is launching a special issue titled “electrochemical conversion and utilization of hydrogen energy”.

关键词： hydrogen energy. electrochemical

Interval arithmetic operations for uncertainty analysis with correlated interval variables

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Acta Mechanica Sinica 2016年第4期32卷 743-752页

作者： Chao Jiang Chun-Ming fu Bing-Yu Ni Xu Han State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle Engineering Hunan University

A new interval arithmetic method is proposed to solve interval functions with correlated intervals through which the overestimation problem existing in interval analysis could be significantly alleviated. The correlation between interval parameters is defined by the multidimensional parallelepiped model which is convenient to describe the correlative and independent interval variables in a unified framework. The original interval variables with correlation are transformed into the standard space without correlation,and then the relationship between the original variables and the standard interval variables is obtained. The expressions of four basic interval arithmetic operations, namely addition, subtraction, multiplication, and division, are given in the standard space. Finally, several numerical examples and a two-step bar are used to demonstrate the effectiveness of the proposed method.

关键词： operations uncertainty arithmetic correlative unified transformed considering convenient subtraction illustrated