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S-type anion channel SLAC1's homologues inhibit inward potassium channels AKT2 and KAT2 in Arabidopsis

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Science Bulletin 2017年第7期62卷 464-466页

作者： Fen-yong Yao Guo-Ning Qi Hui-min Ren An Zhang Jamshaid Hussain yong-Fei Wang National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200032 China University of Chinese Academy of Sciences Shanghai 200032 China Biotechnology Program Department of Environmental Sciences COMSATS Institute of Information Technology Abbottabad 22060 Pakistan

Cations and anions are involved in plant growth,development and signaling responses as essential nutrients,signaling molecules and osmotic components,and the dynamic movement of the diverse ions through biological mem... 详细信息

关键词： SLAC type

Shape memory effect of dual-phase NiMnGaTb ferromagnetic shape memory alloys

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Journal of Iron and Steel Research International 2019年第3期26卷 321-328页

作者： Jiang Zhang yong-hong Ma Ruo-lin Wu Jing-min Wang Institute of Higher Education Beihang UniversityBeijing 100191China School of Materials Science and Engineering Beihang UniversityBeijing 100191China Central Iron&Steel Research Institute Beijing 100081China

The evolution of microstructure,reverse martensitic transformation and the conelated influence on shape memory effect was investigated in as-cast and directionally solidified dual-phase NiMnGaTb *** directionally solidified alloys exhibit single-crystal microstructure,preferred dendrite microstructure,and mussy dendrite microstructure in the specimens grown at a withdrawal rate(v)of 10,50 and 200,and 1000μm/s,*** precipitates dispersively distribute in the martensite matrix for the directionally solidified *** the refined grains and particle precipitates,the reverse martensitic transformation gradually shifts to lower temperatures and the temperature span is significantly *** directional solidification technology can effectively enhance the strains recovered due to shape memory effect C;sme)and decrease the compressive stress required to trigger the reorientation of twins(δ)via the realization of preferred orientation,while the maximalεsme and minimumδcan reach 4.96%and 14 MPa in v=10μm/s specimens,*** formation of dendrite morphology degrades the shape memory strain,andεsme decreases with the growth of secondary dendritic arms.

关键词： NiMnGaTb alloy Directional solidification Dual-phase microstructure Shape memory effect

Direct Observation of Domain-Inverted Regions in Proton-Exchanged LiNbO_(3) Using Transmission Electron Microscopy

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Chinese Physics Letters 1996年第5期13卷 362-365页

作者： ZHANG Zhi-yong WANG Lu-chun ZHU yong-yuan ZHU Shi-ning min Nai-ben National Laboratory of solid state microstructures Nanjing Universityand Center for Advanced Studies in Science and Technology of MicrostructuresNanjing 210093

Direct observation of the domain-in-verted regions in LiNbO_(3) formed by proton exchange followed by heat treatment is performed by using transmission electron microscopy.A charged straight 180°tivinning domain boundary was revealed and compared with winding domain boundaries in LiNbO_(3) grown by Czochralski *** results are significant to studying the mechanism of domain inversion and morphology of inversion domains.

关键词： method. straight Electron

An improved specimen preparation method for marine shallow gasbearing sand sediments and its validations

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Journal of Rock Mechanics and Geotechnical Engineering 2021年第3期13卷 682-693页

作者： yong Wang Lingwei Kong min Wang Yanli Wang Peng Cheng State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China Fluid Dynamics and Solid Mechanics Theoretical DivisionLos Alamos National LaboratoryLos Alamos87545USA Key Laboratory of Geotechnical Mechanics and Engineering of the ministry of Water Resources Yangtze River Scientific Research InstituteWuhan430010China Hunan University Design Institute Co. Ltd.Changsha410082China

Instabilities of shallow gas-charged seabed are potential geological hazards in ocean *** practice,the conventional field sampling techniques failed to obtain undisturbed gas-bearing sediments from the seabed for laboratory mechanical testing because of sensitive gas exsolution and escape from ***,preparation of representative remoulded gas-charged specimens is a challenging issue,because it is rather difficult to quantitatively control the gas content and obtain uniform distribution of gas bubbles within the *** the above problems,this work proposes a reliable approach to reconstitute the high-saturation specimen of gas-charged sediments in the laboratory by an improved multifunction integrated triaxial apparatus(MITA).This apparatus is developed based on an advanced stress path triaxial system by introducing a temperature-controlled system and a wavemonitoring *** temperature-controlled system is used to accurately mimic the in situ environments of sediments in the *** wave-monitoring system is utilized to identify exsolution point of free gas and examine the disturbance of gas to specimens during gas *** detailed procedure of gassy specimen preparation is ***,the quality of prepared specimens using our improved apparatus is validated by the high-resolution micro-X-ray computed tomography(mCT)scanning test,from which bubble occurrence and size distribution within the gassy sand specimen can be obtained;and preliminary mechanical tests on gassy sand specimens with various initial saturation degrees are *** proposed specimen preparation procedure succeeds in proving the postulated occurrence state of gas bubbles in coarse-grained sediments and accurately controlling the gas content.

关键词： Shallow gas Gas-bearing sediments Bubbles Mechanical behaviour Bender element

Biomass accumulation and organic carbon stocks of Kandelia obovata mangrove vegetation under different simulated sea levels

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Acta Oceanologica Sinica 2022年第8期41卷 78-86页

作者： Jiahui Chen min Gao Guangcheng Chen Heng Zhu yong Ye Key Laboratory of the ministry of Education for Coastal and Wetland Ecosystems College of the Environment and EcologyXiamen UniversityXiamen 361102China Third Institute of Oceanography Ministry of Natural ResourcesXiamen 361005China Fujian Provincial Station for Field Observation and Research of Island and Costal Zone in Zhangzhou Xiamen 361005China

Mangrove forests are vulnerably threatened by sea level rise(SLR).Vegetation organic carbon(OC)stocks are important for mangrove ecosystem carbon *** is critical to understand how SLR affects vegetation OC stocks for evaluating mangrove blue carbon budget and global climate *** this study,biomass accumulation and OC stocks of mangrove vegetation were compared among three 10 year-old Kandelia obovata(a common species in China)mangrove forests under three intertidal elevations through species-specific allometric *** study simulated mangrove forests with SLR values of 0 cm,40 cm and 80 cm,respectively,representing for the current,future~100 a and future~200 a SLR of mangrove forests along the Jiulong River Estuary,*** directly decreased mangrove individual density and inhibited the growth of mangrove *** total vegetation biomasses were(12.86±0.95)kg/m^2,(7.97±0.90)kg/m^2 and(3.89±0.63)kg/m^2 at Sites SLR 0 cm,SLR40 cm and SLR 80 cm,*** total vegetation OC stock decreased by approximately 3.85 kg/m^2(in terms of C)from Site SLR 0 cm to Site SLR 80 *** lower vegetation biomass and OC stock of various components(stem,branch,leaf and root)were found at Site SLR 80 *** increments of vegetation biomass and OC stock also decreased with SLR ***,significant lower sedimentation rate was found at Site SLR 80 *** indicated that SLR will decrease mangrove vegetation biomass and OC stock,which may reduce global blue carbon sink by mangroves,exacerbate global warming and give positive feedback to SLR.

关键词： sea level rise vegetation biomass organic carbon stock component mangrove forest Kandelia obovata

Large-disturbance Stability Analysis of Power Systems with Synchronous Generator and Converter-interfaced Generation

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 997-1002页

作者： Lei Chen yong min Liangshuai Hao Guangzheng Xing Yalou Li Shiyun Xu Department of Electrical Engineering Tsinghua UniversityBeijing 100084China China Electric Power Research Institute Beijing 100192China

This letter studies large-disturbance stability of the power system with a synchronous generator(SG)and a converter-interfaced generation(CIG)connected to infinite *** power system is multi-timescale and first *** is shown that the boundary of region of attraction(ROA)of the simplified model is composed of stable manifolds of unstable equilibrium point(UEP)or semi-singular point(SSP),named anchor points,and singular surface *** type of anchor point determines the dominant instability pattern of the power *** the anchor point is UEP or SSP,the dominant instability pattern is the instability of rotor angle of SG or the instability of phase-locked loop and outer control loop(OCL)of CIG,*** of dominant instability pattern can be analyzed with the relative position relationship between UEP and *** effect of OCL is *** the OCL is activated,the ROA becomes smaller and the system is more prone to instability of *** is necessary to consider the OCL when studying the large-disturbance stability of the power system.

关键词： Converter-interfaced generation large-disturbance stability outer control loop phase-locked loop synchronous generator voltage source converter

Comparison of two reliability models for performance degradation analysis

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航空动力学报 2015年第7期30卷 1632-1637页

作者： WANG Zhi-hua ZANG Guang-kui ZHANG yong-bo FU Hui-min Research Center of Small Sample Technology Beijing University of Aeronautics and Astronautics

In order to investigate the general reliability assessment methods based on performance degradation data,two commonly used stochastic process approaches,bilinear process method and random-effect model were *** procedure and effectiveness of these two methodologies were studied and ***,the two approaches were illustrated through practical *** residual plots and the 10th percentile curves of the two methods were presented to demonstrate the comparative *** randomeffect model yielded more volatile residuals and a lower and unsafe 10th percentile *** the bilinear process model can be concluded to derive more reasonable results due to its one-stage estimation property.

关键词： degradation analysis reliability assessment stochastic process bilinear independent increment process random-effect model

Study on the reactions of azo compounds with acyl halides mediated by Sm/TiCl_4

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第3期7卷 198-201页

作者： LI Xue ZHANG yong-min Department of Chemistry Zhefiang University Hangzhou 310028 China State Key Laboratory of Organometallic Chemistry Chinese Academy of Sciences Shanghai 200032 China

Amides can be obtained in good to excellent yield by Sm/TiCl4 mediated reductive cleavage of N=N bond in azo compounds and successive acylation in one pot. It offers an alternative method for the synthesis of amides f... 详细信息

关键词： Azo compounds Reduction Amides Sm/TiCl4

Antistatic coating material consisting of poly (butylacrylate-co-styrene) core-nickel shell particle

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中国有色金属学会会刊：英文版 2009年第B09期19卷 119-123页

作者： min-Yeong JEONG Byung-Yoon ahn Sang-Koul LEE Won-Ki LEE Nam-Ju JO Department of Polymer Science and Engineering Pusan National University Kumho Petrochemical Samsung Corning Precision Glass Division of Chemical Engineering Pukyong National University

A transparent and antistatic coating material consisting of polymer core-metal shell particle was prepared. As a polymer core, poly(butylacrylate-co-styrene)s ([P(BA-co-sty)s]) with various compositions of butylacrylate and styrene were synthesized by emulsion polymerization. And the effect of comonomer composition on the thermal property of polymer core particle was investigated. By electroless plating method, the nickel particles were formed and deposited on the surface of P(BA-co-Sty) particles to form P(BA-co-Sty) core-nickel shell composite particles. SEM observation confirms that the nickel particles with size of 15 nm are distributed on the surface of the polymer core particles. The surface resistance of P(BA-co-Sty) core-nickel shell composite is 0.8×108Ω/cm2, enough to act as antistatic coating material.

关键词：复合粒子涂层材料单体组成抗静电苯乙烯丁酯聚合物颗粒镍