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Cube texture evolution of Ni5W alloy substrates and La-Zr-O buffer layer of YBCO-coated conductors

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Rare Metals 2022年第11期41卷 3887-3894页

作者： Pan Wang Hui tian Hong-Li Suo cheng Ren Ya-Ru Liang lin Ma Min Liu College of Materials Science and Engineering University of TechnologyBeijing100124China

The cube texture evolution of Ni-5 at%W alloy deformed up to a very high strain was thoroughly investigated by X-ray diffraction(XRD) and electron back-scattered diffraction(EBSD) during the process of deformation,recrystallization and grain growth.A typical copper-type rolling texture,mainly consisting of components of S,copper and brass orientations,is obtained after heavy cold *** fraction of rolling texture is slightly strengthened during recovery and then strongly reduced during recry stallization *** cube texture is formed by consuming the rolling texture components during the discontinuous recry stallization *** cube grains have a size advantage with respect to the non-cube grains.A strong cube-textured Ni5 W alloy substrate with cube texture area fraction of 98.2 %(ling at 1050℃ for 1 *** full width half maximum(FWHM) values for the X-ray(111) φ-scan and the(002)ω-scan of this substrate are 5.84° and 4.76°,***,the area fraction of {001}(110) orientation of the epitaxially grown La_(2)Zr_(2)O_(7) buffer layer is 97.1 %(<10°),and the FWHM values of(111) φ-scan and(002)ω-scan are 5.22° and 5.00°,respectively.

关键词： Ni5W alloy Recrystallization Texture Microstructure La_(2)Zr_(2)O_(7)

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大颗粒尿素生产工艺

天津化工 1999年第6期13卷 1-5页

作者：于经元於莉莉康仕芳李天成林树成天津大学化工学院工业化学与核化工研究室 300072

本文介绍了大颗粒尿素的概况和当今世界上生产大颗粒尿素的主要工艺流程,并给出了HTPG、NSM、FDG 及天津大学生产大颗粒尿素的工艺流程图和主要操作参数。最后对大颗粒尿素的前景进行了展望。

关键词：大颗粒尿素流化床缓释化肥氮肥工艺

Reversible CO_(2)-, Photo-and Thermo-Triple Responsive Supramolecular Chirality of Azo-containing Block Copolymer Assemblies Prepared by Polymerization-induced Chiral Self-assembly

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Chinese Journal of Polymer Science 2022年第1期40卷 56-66页

作者： Ya-Jing Sun Xiao-Xiao cheng Teng-Fei Miao Hao-tian Ma Wei Zhang Xiu-lin Zhu Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application State and Local Joint Engineering Laboratory for Novel Functional Polymeric MaterialsCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou Industrial ParkSuzhou 215123China

Polymerization-induced chiral self-assembly(PICSA)is an efficient strategy that not only allows the construction of the supramolecular chiral assemblies in a controlled manner but also can regulate the morphology in ***,a series of azobenzene-containing block copolymer(Azo-BCP)assemblies with tunable morphologies and supramolecular chirality were obtained through the PICSA *** supramolecular chirality of Azo-BCP assemblies could be regulated by carbon dioxide(CO_(2))stimulus,and completely recovered by bubbling with Ar.A reversible morphology transformation and chiroptical switching process could also be achieved by the alternative 365 nm UV light irradiation and heatingcooling ***,the supramolecular chirality is thermo-responsive and a reversible chiral-achiral switching was successfully realized,which can be reversibly repeated for at least five *** work provides a feasible strategy for constructing triple stimuli-responsive supramolecular chiral nano-objects in situ.

关键词： Supramolecular chirality Polymerization-induced self-assembly Azobenzene CO_(2)responsiveness

Computational dynamics of soft machines

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Acta Mechanica Sinica 2017年第3期33卷 516-528页

作者： Haiyan Hu Qiang tian cheng Liu MOE Key Lab of Dynamics and Control of Flight Vehicles School of Aerospace Engineering Beijing Institute of Technology

Soft machine refers to a kind of mechanical system made of soft materials to complete sophisticated missions, such as handling a fragile object and crawling along a narrow tunnel corner, under low cost control and actuation. Hence, soft machines have raised great challenges to computational dynamics. In this review article, recent studies of the authors on the dynamic modeling, numerical simulation, and experimental validation of soft machines are summarized in the framework of multibody system dynamics. The dynamic modeling approaches are presented first for the geometric nonlinearities of coupled overall motions and large deformations of a soft component, the physical nonlinearities of a soft component made of hyperelastic or elastoplastic materials, and the frictional contacts/impacts of soft components, respectively. Then the computation approach is outlined for the dynamic simulation of soft machines governed by a set of differential-algebraic equations of very high dimensions, with an emphasis on the efficient computations of the nonlinear elastic force vector of finite elements. The validations of the proposed approaches are given via three case studies, including the locomotion of a soft quadrupedal robot, the spinning deployment of a solar sail of a spacecraft, and the deployment of a mesh reflector of a satellite antenna, as well as the corresponding experimental studies. Finally, some remarks are made for future studies.

关键词： Computational dynamics Multibody system dynamics Absolute nodal coordinate formulation Contact and impact Soft machine Soft robot Deployable space structure

Hierarchical flower-like NiFe2O4 with core-shell structure for excellent toluene detection

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Rare Metals 2021年第6期40卷 1578-1587页

作者： Yan-lin Zhang Chao-Wei Jia Ruo-Nan tian Hong-Tao Guan Gang Chen cheng-Jun Dong School of Materials and Energy Yunnan UniversityKunming 650091China

The extensive use of toluene stimulates the effective detection by sensitive gas sensors based on unique ***,hierarchical flower-like NiFe_(2)O_(4) with core-shell architecture was synthesized by a facile hydrothermal method in the presence of urea and NH4 *** controllable experiments indicated that the burr spheres and football-like samples were produced with individual urea or NH4 *** flower-like NiFe_(2)O_(4) sensor exhibited outstanding sensitivity of 19.95 to 100×10^(-6) toluene with low detection limit(1×10^(-6)).Furthermore,the sensor showed superior sensing selectivity and longterm stability to *** excellent sensing properties could largely arise from a combination of high surface area,numerous active sites,porous structures,and the native catalytic characteristics of NiFe2 O4 to facilitate toluene molecules adsorption,diffusion,and reaction.

关键词： Hierarchical NiFe2O4 Core-shell Gas sensor Toluene

Phase-field model of precipitation processes with coherency loss

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npj Computational Materials 2021年第1期7卷 338-348页

作者： tian-Le cheng You-Hai Wen National Energy Technology Laboratory AlbanyORUSA Leidos Research Support Team AlbanyORUSA

A phase-field model is proposed to simulate coherency loss coupled with microstructure evolution.A special field variable is employed to describe the degree of coherency loss of each particle and its evolution is governed by a Ginzburg-Landau type kinetic *** the sake of computational efficiency,a flood-fill algorithm is introduced that can drastically reduce the required number of field variables,which allows the model to efficiently simulate a large number of particles sufficient for characterizing their statistical features during Ostwald *** model can incorporate size dependence of coherency loss,metastability of coherent particles,and effectively incorporate the underlying mechanisms of coherency loss by introducing a so-called differential energy *** model is applied to simulate coarsening of Al3Sc precipitates in aluminum alloy and comprehensively compared with *** results clearly show how the particle size distribution is changed during coherency loss and affects the coarsening rate.

关键词： coherency alloy microstructure

Multistatic ground-based differential interferometric MIMO radar for 3D deformation measurement

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Science China(Information Sciences) 2021年第12期64卷 248-249页

作者： cheng HU Yunkai DENG Weiming tian School of Information and Electronics Beijing Institute of Technology

Deformation measurement is crucial for forecasting landslide hazards of natural and engineered slopes. Ground-based differential interferometric radar(GB-DInRad) uses phase differential interferometric technology for ... 详细信息

关键词： Information Systems and Communication Service

Functional Characterization of a NEM1-Like Gene in Magnaporthe oryzae

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Agricultural Sciences in China 2011年第9期10卷 1385-1390页

作者： WANG Ying JIAO tian-lei LIU Xiao-hong lin Fu-cheng WU Wei-ren Department of Agronomy College of Agriculture ＆ Biotechnology Zhejiang University Hangzhou 310029 P.R.China Institute of Biotechnology College of Agrieulture ＆ Biotechnology Zhejiang University Hangzhou 310029 PR. China School of Life Sciences Fujian Agriculture ＆ Forestry University Fuzhou 350002 P.R. China

Magnaporthe oryzae, a filamentous ascomycete fungus, is well known as the causal agent of rice blast. With the technology of suppression subtractive hybridization （SSH）, it was previously found that MGG_06001 （or named MoNEM1）, a gene of M. oryzae homologous to the NEM1 （nuclear envelope morphology protein 1） gene of baker＇s yeast （Saccharomyces cerevisiae）, is differentially expressed between the mature appressium and the conidium and mycelium. This study aimed to characterize the function of MoNEM1 gene by knocking it out using the method of target gene replacement. The AMoneml mutants exhibited reduced mycelial growth and conidiation. However, disruption of MoNEM1 gene does not affect the pathogenicity of M. oryzae on barley and rice.

关键词： Magnaporthe oryzae MoNEM1 conidiation growth pathogenicity

Characterization of thermal-shock cracks in ceramic bars

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Science China(Physics,Mechanics & Astronomy) 2014年第12期57卷 2205-2208页

作者： XU Xiang Hong tian cheng SHENG Shi Long lin Zhong Kang SONG Fan State Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences

Experimental analysis of the cracking in the ceramics subsequent to water quenching have been conducted to clarify the uncertainties of cracking in the ceramics when subjected to thermal *** results here indicate that at the critical point of quench temperature,the crack density and the depth reached the minimum and the maximum limits,*** increase of the quench temperature,the crack density increased rapidly before reaching its saturation point,while the crack depth initially decreased rapidly and then increased gradually before reaching its saturation point.

关键词： thermal-shock crack ceramics