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Chromatin-remodeling complexes:Conserved and plant-specific subunits in Arabidopsis

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Journal of Integrative Plant Biology 2022年第2期64卷 499-515页

作者： Ji-Yun Shang Xin-jian he National Institute of Biological Sciences Beijing102206 China Tsinghua Institute of Multidisciplinary Biomedical Research Tsinghua UniversityBeijing100084 China

Adenosine triphosphate-dependent chromatin remodeling complexes are important for the regulation of transcription,DNA replication,and genome stability in *** genetic studies have illustrated various biological functions of core and accessory subunits of chromatin-remodeling complexes in plants,the identification and characterization of chromatin-remodeling complexes in plants is lagging behind that in yeast and *** studies determined whether and how the Arabidopsis SWI/SNF,ISWI,INO80,SWR1,and CHD chromatin remodelers function in multi-subunit complexes in *** conserved and plant-specific subunits of chromatin-remodeling complexes have been identified and *** findings provide a basis for further studies of the molecular mechanisms by which the chromatinremodeling complexes function in plants.

关键词： ATPase chromatin remodeling complex INO80 ISWI SWI/SNF SWR1 transcription

Transformer real-time reliability model based on operating conditions

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第3期8卷 378-383页

作者： he jian CheNG Lin SUN Yuan-zhang State Key Laboratory of Power Systems Department of Electrical Engineering Tsinghua University Beijing 100084 China

Operational reliability evaluation theory reflects real-time reliability level of power system. The component failure rate varies with operating conditions. The impact of real-time operating conditions such as ambient temperature and transformer MVA (megavolt-ampere) loading on transformer insulation life is studied in this paper. The formula of transformer failure rate based on the winding hottest-spot temperature (HST) is given. Thus the real-time reliability model of transformer based on oper- ating conditions is presented. The work is illustrated using the 1979 IEEE Reliability Test System. The changes of operating conditions are simulated by using hourly load curve and temperature curve, so the curves of real-time reliability indices are ob- tained by using operational reliability evaluation.

关键词： Operational reliability Real-time reliability model Transformer Winding hottest-pot temperature (HST)

Effects of laser shock processing onθ-Al_(2)O_(3)toα-Al_(2)O_(3)transformation and oxide scale morphology evolution in(γ'+β)two-phase Ni-34Al-0.1Dy alloys

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Journal of Materials Science & Technology 2022年第14期109卷 157-166页

作者： Bangyang Zhou jian he Qijie Zhou Hongbo Guo School of Materials Science and Engineering Beihang University(BUAA)Beijing 100191China Research Institute for Frontier Science Beihang University(BUAA)Beijing 100191China Key Laboratory of High-Temperature Structural Materials&Coatings Technology(Ministry of Industry and Information Technology) Beihang University(BUAA)Beijing 100191China

(γ’+β)two-phase Ni-Al is a promising high-temperature protective coating material used on Ni-base superalloys since it has good interfacial compatibility with superalloys due to the low Al content compared to single-phaseβ-NiA *** this paper,we aim to improve the oxidation resistance,whereby Ni-34Al-0.1Dy,a(γ’+β)two-phase Ni-Al alloy,was treated by laser shock processing(LSP)and the oxidation behavior at 1150℃ was *** results showed that after oxidation,Al_(2)O_(3)scale formed on the originalβphase of the untreated alloy with a small grain size(200-800 nm),while for the LSP-treated samples,the scale grown on the originalβphase was dominantly composed of larger Al_(2)O_(3)grains with a size of 2-3μ*** distinction was attributed to the promotion ofθ-Al_(2)O_(3)toα-Al_(2)O_(3)transformation induced by the LSP,because the dislocation density,as well as surface roughness,were increased during LSP treatment which can provide heterogeneous nucleation sites forα-Al_(2)O_(3).In addition,the larger-size Al_(2)O_(3)particles,derived from the direct conversion of needle-likeθ-Al_(2)O_(3)in the initial oxidation stage,could rapidly overspread the wholeβphase surface thus reducing the scale growth rate.

关键词： Intermetallics Laser shock processing Oxidation θ-Al_(2)O_(3)toα-Al_(2)O_(3)transformation Morphology evolution

Probing new physics in dimension-8 neutral gauge couplings at e^+e^-colliders

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Science China(Physics,Mechanics & Astronomy) 2021年第2期64卷 2-26页

作者： John Ellis Hong-jian he Rui-Qing Xiao Department of Physics Kings College LondonStrandLondonWC2R 2LSUK Theoretical Physics Department CERNCH-1211Geneva 23Switzerland NICPB Rävala 10Tallinn10143Estonia Tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Key Laboratory for Particle Physics and CosmologyShanghai Jiao Tong UniversityShanghai200240China Institute of Modern Physics and Department of Physics Tsinghua UniversityBeijing100084China Center for High Energy Physics Peking UniversityBeijing100871China

Neutral triple gauge couplings(nTGCs)are absent in the standard model effective theory up to dimension-6 operators,but could arise from dimension-8 effective *** this work,we study the pure gauge operators of dimension-8 that contribute to nTGCs and are independent of the dimension-8 operator involving the Higgs *** show that the pure gauge operators generate both ZγZ^*and Zγγ^*vertices with rapid energy dependence∝E^5,which can be probed sensitively via the reaction e^+e^-→Zγ.We demonstrate that measuring the nTGCs via the reaction e^+e^-→Zγfollowed by Z→qq decays can probe the new physics scales of dimension-8 pure gauge operators up to the range(1-5)TeV at the CEPC,FCC-ee and ILC colliders with s~(1/2)=(0.25-1)TeV,and up to the range(10-16)TeV at CLIC with s~(1/2)=(3-5)TeV,assuming in each case an integrated luminosity of 5 ab~(-1).We compare these sensitivities with the corresponding probes of the dimension-8 nTGC operators involving Higgs doublets and the dimension-8 fermionic contact operators that contribute to the e^+e^-Zγvertex.

关键词： neutral triple gauge couplings new physics beyond the standard model effective field theory e^+e^-colliders

A review on conventional and nonconventional machining of SiC particle-reinforced aluminium matrix composites

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Advances in Manufacturing 2020年第3期8卷 279-315页

作者： Ji-Peng Chen Lin Gu Guo-jian he School of Mechanical and Electronic Engineering Nanjing Forestry UniversityNanjing 210037People’s Republic of China Department of Mechanical Engineering Polytechnic University of MilanPiazza Leonardo da Vinci 32Milan 20133Italy State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Among the various types of metal matrix composites,SiC particle-reinforced aluminum matrix composites(SiCp/Al)are finding increasing applications in many industrial fields such as aerospace,automotive,and ***,SiCp/Al composites are considered as difficult-to-cut materials due to the hard ceramic reinforcement,which causes severe machinability degradation by increasing cutting tool wear,cutting force,*** improve the machinability of SiCp/Al composites,many techniques including conventional and nonconventional machining processes have been *** purpose of this study is to evaluate the machining performance of SiCp/Al composites using conventional machining,i.e.,turning,milling,drilling,and grinding,and using nonconventional machining,namely electrical discharge machining(EDM),powder mixed EDM,wire EDM,electrochemical machining,and newly developed high-efficiency machining technologies,e.g.,blasting erosion arc *** research not only presents an overview of the machining aspects of SiCp/Al composites using various processing technologies but also establishes optimization parameters as reference of industry applications.

关键词： SiCp/Al Machining Conventional Wear mechanism Nonconventional Performance

An Improved Result for Positive Measure Reducibility of Quasi-periodic Linear Systems

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Acta Mathematica Sinica,English Series 2006年第1期22卷 77-86页

作者： Hai Long he jian Gong YOU Department of Mathcmatics Nanjing University Nanjing 210093 P. R. China

In this paper, by the KAM method, under weaker small denominator conditions and nondegeneracy conditions, we prove a positive measure reducibility for quasi-periodic linear systems close to constant： X = （A（λ）＋ F（ψ, λ））X, ψ=ωwhere the parameter λ∈ （a, b）, w is a fixed Diophantine vector, which is a generalization of jorba ＆ Simo＇s positive measure reducibility result.

关键词： Quasi-periodic Reducibility KAM Non-degeneracy

Asymptotic Property for Some Series of Probability

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Acta Mathematicae Applicatae Sinica 2013年第1期29卷 179-186页

作者： jian-jun he Ting-fan XIE Department of Mathematics China Jiliang University

Abstract Let {X, Xn, n ≥ 1} be a sequence of *** variables with zero mean, and set Sn = n∑k=1Xk, EX2 = σ2 〉 0, λ（ε） = ∞∑n=1P（1Sn1 ≥ ns）. In this paper, we discuss the rate of the approximation of σ2 by ... 详细信息

关键词： asymptotic property the rate of approximation complete convergence

APPLICATION OF The FACTORIZATION METHOD TO RECOVER CUTS WITH OBLIQUE DERIVATIVE BOUNDARY CONDITION

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Journal of Computational Mathematics 2022年第3期40卷 373-395页

作者： Jun Guo jian he Jin Li School of Mathematics and Statistics South-Central University For NationalitiesWuhanChina Department of Basic Courses Air Force Early Warning AcademyWuhanChina School of Science Jiujiang UniversityJiujiangChina

Direct and inverse problems for the scattering of cracks with mixed oblique derivative boundary conditions from the incident plane wave are considered,which describe the scattering phenomenons such as the scattering of tidal waves by spits or *** solvability of the direct scattering problem is proven by using the boundary integral equation *** order to show the equivalent boundary integral system is Fredholm of index zero,some relationships concerning the tangential potential operator is *** to the mixed oblique derivative boundary conditions,we cannot employ the factorization method in a usual manner to reconstruct the *** alternative technique is used in the theoretical analysis such that the far field operator can be factorized in an appropriate form and fulfills the range identity ***,we present some numerical examples to demonstrate the feasibility and effectiveness of the factorization method.

关键词： Direct and inverse scattering Oblique derivative Crack The factorization method

Objectives and strategies for energy revolution in the context of tackling climate change

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Advances in Climate Change Research 2015年第2期6卷 101-107页

作者： he jian-Kun Research Center for Contemporary Management Tsinghua University

Global climate change mitigation and CO2 emission reduction have promoted the revolutionary transformation in energy *** core content of energy system revolutionary transformation is to replace the high-carbon energy system dominated by fossil energy with low-carbon energy system dominated by new and renewable energy and finally realize the near-zero emission of *** new energy system transformation has also led to a reform in global economic and social development *** low-carbon economy becomes the fundamental strategy of sustainable development under climate risk management and the only solution to getting on the road from industrial civilization to ecological *** intends to achieve the peaking of CO2 emissions around 2030 and increase the share of non-fossil fuels in primary energy consumption to around 20% by *** by the targets,China directs its economy development to a low-carbon ***,new and renewable power capacity need to reach 1300 GW,and the electricity generated should be 4 times of that in 2013 with a continuous increase rate of 6%e8% around *** pace of energy substitution need to be accelerated and efficient,safe,clean,and low-carbon energy supply and consumption systems should be established besides strengthened energy conservation and improved energy ***,reform need be deepened,favorable policy system and market mechanism for energy revolution and low-carbon development need be established,energy pricing mechanism should be reformed,and national carbon market should be formed to provide a favorable policy and market environment for low-carbon technology innovation and industry development.

关键词： Climate change Energy revolution Low-carbon develo