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Nuclear magnetic moments in covariant density functional theory

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Frontiers of physics 2018年第6期13卷 115-132页

作者： jian Li j.meng College of Physics Jilin UniversityChangchun 130012China Department of Physics Western Michigan UniversityKalamazooMI 49008USA State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Yukawa Institute for Theoretical Physics Kyoto UniversityKyoto 606-8502Japan Department of Physics University of StellenboschStellenboschSouth Africa

Nuclear magnetic moment is an important physical variable and serves as a useful tool for the stringent test of nuclear models. For the past decades, the covariant density functional theory and its extension have been proved to be successful in describing the nuclear ground-states and excited states properties. However, a long-standing problem is its failure to predict magnetic moments. This article reviews the recent progress in the description of the nuclear magnetic moments within the covariant density functional theory. In particular, the magnetic moments of spherical odd-A nuclei with doubly closed shell core plus or minus one nucleon and deformed odd-A nuclei.

关键词： nuclear magnetic moment covariant density functional theory meson exchange current configuration mixing

Effects of rejuvenation heat treatment on microstructure and creep property of a Ni-based single crystal superalloy

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journal of Materials Science & Technology 2021年第1期60卷 206-215页

作者： K.j.Tan X.G.Wang j.j.Liang j.meng Y.Z.Zhou X.F.Sun Superalloys Division Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Department of Materials Science and Engineering University of Science and Technology of ChinaHefei 230026China

Both surface and internal microstructures of a second-generation Ni-based single crystal(SX) superalloy were studied after creep and rejuvenation heat treatment(RHT).It is indicated that the microstructures,such as the dislocation network,the γ phase and the γ' phase,can be recovered to those after the standard heat treatment(SHT).It is found that RHT affected zone(RAZ) formed at the surface is composed of theγ'-free layer,the transition layer and the recrystallization(RX),which are less than 20 μm in depth *** depth of the RAZ doesn't affect the properties of the *** morphology of γ' phase at the RAZ is related to the composition of the *** average creep life after RHT is close to the average life after *** is concluded that RHT could effectively repair SX parts and increase the total life of the sample after a damage by creep.

关键词： Superalloys Rejuvenation heat treatment Microstructure Creep property

回肠克罗恩病影像学狭窄和内镜下狭窄的临床结果区分

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国际医学放射学杂志 2024年第1期 124-124页

作者： L.Shi Y.Wang X.Shen R.Mao j.meng S.Huang 李桂来

摘要目的克罗恩病（CD）中基于不同定义的肠管狭窄的临床不良后果（CAO）的差异很少有文献报道。研究旨在比较回肠CD的CAO，影像学狭窄（RS）和内镜下狭窄（ES），并

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Reducing the tension-compression yield asymmetry of extruded Mg-Zn-Ca alloy via equal channel angular pressing

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journal of Magnesium and Alloys 2015年第4期3卷 302-308页

作者： L.B.Tong M.Y.Zheng S.Kamado D.P.Zhang j.meng L.R.Cheng H.j.Zhang State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China Department of Mechanical Engineering Nagaoka University of TechnologyNagaoka 940-2188Japan

The influence of equal channel angular pressing on the tension-compression yield asymmetry of extruded Mg-5.3 Zn-0.6 Ca(weight percent)alloy has been *** microstructure was obviously refined by the large strain during the equal channel angular pressing,accompanied with very fine Ca_(2)Mg_(6)Zn_(3) phases with average diameter of 70 *** weak tension-compression yield asymmetry after equal channel angular pressing is mainly attributed to the reduced volume fraction of extension twinning during the compression,because the slope(k)of twinning in Hall-Petch relationship is higher than that of dislocation slip,and the twinning deformation is difficult to take place with decreasing grain *** basal slip is more active in the alloy after equal channel angular pressing,due to the non-basal texture components,which hinders the twinning activation and reduces the yield ***,the presence of fine precipitate restricts the twinning activation,which also contributes to the reduction of yield asymmetry.

关键词： Mg-Zn-Ca alloy Yield asymmetry Equal channel angular pressing Twinning Precipitates

梳理的动态特性——纤维在梳理中运动及分布的研究综述

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国外纺织技术（纺织针织服装化纤染整） 2002年第4期 27-31页

作者： j.meng 徐军

本文首次报道了由美国北卡罗来纳州立大学纺织学院非织造布合作研究中心研究的一系列有关延伸梳理的内容回顾了纤维运动及其在各梳理部件上分布的研究,重点集中于确保纤维从一个梳理部件转移至另一个梳理部件及纤维在不同梳理部件上的... 详细信息

本文首次报道了由美国北卡罗来纳州立大学纺织学院非织造布合作研究中心研究的一系列有关延伸梳理的内容回顾了纤维运动及其在各梳理部件上分布的研究,重点集中于确保纤维从一个梳理部件转移至另一个梳理部件及纤维在不同梳理部件上的分布原理.

关键词：纤维梳理动态特性运动分布综述

控制芸苔油菜种子硫苷含量的位点及其与黑盘菌抗性间的关系

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国外作物育种 2004年第1期23卷 25-26页

作者： j．Zhao j.meng 谢国禄

以前鉴定了H5200和Ning RS-1杂交中与黑盘菌(Sclerotinia sclerotiorum)抗性相关的位点，发现有6个位点在不同的发育阶段和不同的器官中与黑盘菌抗性有关。本文将介绍硫苷及其各种成分的叽绘图结果以及种子特定硫苷含量与抗病性间的关系。

关键词：芸苔油菜种子硫苷含量黑盘菌抗性

SOME SINGULAR SINGULARLY-PERTURBED PROBLEMS (1)

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Annals of Differential Equations 1999年第3期15卷 260-271页

作者： K.W.Chang & j.meng(Dept. of Math. and Statistics, University of Calgary, Canada T2N 1N4)

In this paper, we study some singular singularly-perturbed boundary-value problem Pε consisting of the differential equations and the boundary conditions where t ∈ [0, 1], 0 <ε ≤ ε0. U, V, H1 and H2 are scalar functions and infinitely differentiable with respect to their variables *** approach is somewhat similar to those of Chang [2], Shi [6] and Smith [7]. Our main result (Theorem 4) is new and extends the result, in the scalar case, of Shi [6], who dealt with the problem (1) with V(t, x, ε2y, ε) in place of V(t, x, εy, ε). An application of our result is given at the end.

关键词： BO PI SOME SINGULAR SINGULARLY-PERTURBED PROBLEMS

SOME SINGULAR SINGULARLY- PERTURBED PROBLEMS (2)

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Annals of Differential Equations 1999年第4期15卷 389-400页

作者： K.W .Chang & j.meng(Dept. of Math. and Statistics, University of Canary, Calgary Canada T2N 1N4)

Let Assumptions 1-4 hold, then, when N≥0 is an integer and εissufficiently small, the problem(1)-(4)has a solution x(t,ε)and y(t,ε)∈ C~∞90,1]satisfying Formula(ell.) Where x~N(t,ε)and y~N(t,ε)aredefined in(32)... 详细信息

关键词： Math PERTURBED PROBLEMS SOME SINGULAR SINGULARLY

Varieties of Involution j-Trivial Monoids with Continuum Many Subvarieties

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Algebra Colloquium 2024年第3期31卷 467-480页

作者： meng Gao Wenting Zhang Yanfeng Luo School of Mathematics and Statistics Lanzhou UniversityLanzhou 730000China

In this paper,we give a suficient condition under which an involution monoid generates a variety with continuum many *** to this result,several involution j-trivial monoids are shown to generate varieties with continuum many *** examples include Rees quotients of free involution monoids,Lee monoids with involution,and Straubing monoids with involution.

关键词： monoid involution monoid variety subvariety lattice of varieties