检索结果-南通市图书馆

Entanglement of the Thermal State of an Anisotropic XYZ Spin Chain in an Inhomogeneous Constant Magnetic field

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第3期29卷 9-12页

作者： A.-S.f.Obada g.M.Abd Al-Kadar f.K.faramawy A.A.Youssef Mathematics Department Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt

A system of a two-qubit Heisenberg anisotropic XYZ spin chain in an inhomogeneous constant magnetic field with the Dzyaloshinskii-Moriya interaction is *** energy eigenvalues,the corresponding eigenstates and the thermal states of the system are *** entanglement is investigated according to Wootter's *** concurrence is studied against temperature for different values of the parameters involved.

关键词： system concurrence states

The Ame2020 atomic mass evaluation (I). Evaluation of input data, and adjustment procedures

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第3期45卷 181-522页

作者： W.J.Huang Meng Wang f.g.Kondev g.Audi S.Naimi Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Advanced Energy Science and Technology guangdong Laboratory Huizhou 516003China University of Chinese Academy of Sciences Beijing 100084China Max-Planck-Institut fur Kernphysik Saupfercheckweg 169117 HeidelbergGermany School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China Physics Division Argonne National LaboratoryLemontIL 60439USA RIKEN Nishina Center WakoSaitama 351-0198Japan

This is the first of two articles(Part I and Part II)that presents the results of the new atomic mass evaluation,*** includes complete information on the experimental input data that were used to derive the tables of recommended values which are given in Part *** article describes the evaluation philosophy and procedures that were implemented in the selection of specific nuclear reaction,decay and mass-spectrometric data which were used in a least-squares fit adjustment in order to determine the recommended mass values and their *** input data,including both the accepted and rejected ones,are tabulated and compared with the adjusted values obtained from the least-squares fit *** with the previous Ame2016 evaluation are discussed and specific examples are presented for several nuclides that may be of interest to Ame users.

关键词： atomic mass evaluation mass spectrometry nuclear decays nuclear reactions least-squares adjustment trends from the mass surface(TMS) atomic-mass tables

The Ame2020 atomic mass evaluation(II).Tables,graphs and references

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2021年第3期45卷 523-1034页

作者： Meng Wang W.J.Huang f.g.Kondev g.Audi S.Naimi Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100084China Advanced Energy Science and Technology guangdong Laboratory Huizhou 516003China Max-Planck-Institut fur Kernphysik Saupfercheckweg 169117 HeidelbergGermany Universite Paris-Saclay CNRS/IN2P3IJCLab91405 OrsayFrance Physics Division Argonne National LaboratoryLemontIL 60439USA RIKEN Nishina Center WakoSaitama 351-0198Japan

This is the second part of the new evaluation of atomic masses,*** least-squares adjustments to all evaluated and accepted experimental data,described in Part I,we derived tables with numerical values and graphs which supersede those given in *** first table presents the recommended atomic mass values and their *** is followed by a table of the influences of data on primary nuclides,a table of various reaction and decay energies,and finally,a series of graphs of separation and decay *** last section of this paper provides all input data references that were used in the Ame2020 and the Nubase2020 evaluations.

关键词： atomic mass evaluation atomic mass table separation and reaction energies trends from the mass surface

Langmuir Probe and Optical Emission Spectroscopy Studies of Low-Pressure gas Mixture of CO_2 and N_2

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2010年第3期12卷 314-319页

作者： E.f.MENDEZ-MARTINEZ P.g.REYES D.OSORIO-gONZALEZ f.CASTILLO H.MARTINEZ faculty of Sciences Autonomous University of the State of Mexico Institute of Nuclear Sciences Autonomous National University of Mexico Institute of Physical Sciences Autonomous National University of Mexico

Optical emission spectroscopy was used to study a gas mixture glow discharge of CO2 and N2 at a total pressure of 1.2 Torr, a power of 100 W and a flow of 16.5 L/min. The emission bands were measured in the wavelength range of 200 nm to 900 nm. The principal species observed were O2^＋（A^2П→ X^2П）, CO^＋（A^2П→X^2∑）, N2^＋（B^2∑u＋ → X^2∑g^＋）, CO2^＋（A^2∏ → X^2∏）, N2（C^3∏u → B^3∏g）, O2（b^1∑g^＋→ X^3∑g^-）, and CO （a^r3∑→a^3∏）. The behavior of the band intensities as a function of the N2 percentage is consistent with recent Monte Carlo simulations. The electron temperature and ion density were determined by a double Langmuir probe. The electron temperature was found in the range of 1.55 eV to 2.93 eV, and the electron concentration in the order of 10^10 cm^-3. The electron temperature and ion density at pure N2 and pure CO2 agree with previous measurements.

关键词： optical emission spectroscopy glow discharge electron temperature CO2 N2

STUDY ON gRANULATION MECHANISMS Of γ+(fe,Mn)3C EUTECTICS IN AUSTENITE STEEL COMPOSITES

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2003年第6期16卷 449-456页

作者： g.f.Liang Z.M.Xu Q.C.Jiang J.g.Li SchoolofMaterialsScienceandTechnology ShanghaiJiaotongUniversityShanghai200030China SchoolofMaterialsScience JilinUniversityChangchun130025China

Results presented in this paper contribute to investigation of the granulation mechanisms of γ+(fe,Mn)3C eutectics in the austenite matrix composites (abbreviated EAMC). The specimens corresponding to the nominal composition of eutectic with controlled RE(Ce)-Mg agent modifier additions have been unidirectional solidified with a constant growth rate of 2.18μm/s at a fixed temperature gradient of 800K/cm using vertical Bridgeman method. With the RE-Mg agent modifier, the transition of solid/liquid (S/L) interface from columnar to dendrite (CDT), refinement and developed branching of γ and (fe,Mn)3C phases in the eutectics, and the transition of growth style from faceted-nonfaceted (f/Nf) to nonfaceted-nonfaceted (Nf/Nf) for γ and (fe,Mn)3C phases in the eutectic have been observed and investigated theoretically. Those can explain the granulation of γ+(fe,Mn)3C eutectics in the as cast because the roundness increases with the developed lateral branching of primary austenite dendrites, refinement of eutectics, and Nf/Nf growth of γ and (fe,Mn)3C phases in the eutectic.

关键词： composite RE-Mg agent granulation unidirectional solidifica-tion

Perspectives on the prevention and treatment of infection for orthopedic tissue engineering applications

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2013年第35期58卷 4342-4348页

作者： SHAH Sarita R KASPER f Kurtis MIKOS Antonios g Department of Bioengineering Rice University P.O. Box 1892 MS 142 Houston Texas 77251-1892 USA Department of Chemical and Biomolecular Engineering Rice University P.O. Box 1892 MS 142 Houston Texas 77251-1892 USA

The emergence of orthopedic tissue engineering devices as viable clinical solutions demands that the field address significant clinical complications associated with the implantation of foreign materials in the body,especially *** tissue engineering has focused on the development of methods to regenerate and repair,until recently there has been a relative dearth of literature regarding the intersection of tissue engineering and *** particular,local delivery of antimicrobials has long been of clinical interest,but only recently has that been translated into the realm of tissue *** this perspective,we briefly review major modes of local delivery for infection prevention and treatment and discuss possible strategies for preventing implant-associated infections.

关键词：组织工程感染骨科治疗预防应用工程设备工程规划

Optoelectronic and thermoelectric properties of Zintl YLi_(3)A_(2)(A = Sb,Bi) compounds through modified Becke-Johnson potential

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2016年第10期25卷 428-435页

作者： T Seddik g Ugur R Khenata S Ugur f Soyalp g Murtaza D P Rai A Bouhemadou S Bin Omran Department of Physics and Astronomy College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

In the present work,we investigate the structural,optoelectronic and thermoelectric properties of the YLi3X2(X = Sb,Bi) compounds using the full potential augmented plane wave plus local orbital(fP-APW+lo) *** exchangecorrelation potential is treated with the generalized gradient approximation/local density approximation(ggA/LDA) and with the modified Becke-Johnson potential(TB-mBJ) in order to improve the electronic band structure *** addition,the estimated ground state properties such as the lattice constants,external parameters,and bulk moduli agree well with the available experimental *** band structure calculations with ggA and LDA predict that both compounds have semimetallic ***,the band structure calculations with the ggA/TB-mBJ approximation indicate that the ground state of the YLi3Sb2compound is semiconducting and has an estimated indirect band gap(Γ-L) of about 0.036 eV while the ground state of YLi3Bi2compound is *** the LDA/TB-mBJ calculations indicate that both compounds exhibit semiconducting characters and have an indirect band gap(Γ-L) of about 0.15 eV and 0.081 eV for YLi3Sb and ***,the optical properties reveal strong responses of the herein materials in the energy range between the IR and extreme UV *** properties such as thermal conductivity,electrical conductivity,Seebeck coefficient,and thermo power factors are also calculated.

关键词： Zintl compounds TB-mBJ electronic band-structure optical properties thermoelectric properties

Environmental Impacts of the Yangtze Three gorges Project: An Overview of the Chinese-german Research Cooperation

在线全文

学校读者我要写书评

暂无评论

Journal of Earth Science 2010年第6期21卷 817-823页

作者： günter Subklew Julia Ulrich Leander fürst Agnes Hltkemeier forschungszentrum Jülich gmbH

The construction of the Three gorges Dam on the Yangtze River in China has a great influence on the ecosystems involved. In order to investigate these environmental effects in the Yangtze catchment area as well as downstream of the dam, forschungszentrum Julich has organized a research network for the Chinese and germaa partners. In the research fields of （1） interaction water/ sediment/contaminants, （2） vegetation/biodiversity, （3） changing land use/erosion/mass movements, and （4） atmosphere, the partners have accumulated a great deal of expertise in handling major issues and also in developing models and recommendations for action. The following provides an overview of the research network and the research tasks. On the german side, five projects in research field （3） have been in operation since 2008. The results are reported in contributions by Ehret et al., Jaehnig and Cai, Schonbrodt et al., and Seeber et al.. Another five projects in research field （1） have started by September 2010. The research tasks undertaken in these five projects are presented below.

关键词： Three gorges Dam Yangtze River environmental research ecosystem.

AN APPLICATION Of fOKKER-PLANCK EQUATION TO JOSEPHSON JUNCTION

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 1989年第1期9卷 109-120页

作者： g.Liao A.f.Laurence A.T.Abawi Department of Mathematics University of Utah Salt Lake City UT 84112Center for Molecular Electronics Carnegie-Mellon University Pittsburg PA 15213Department of Physics University of California San Diego La Jolla CA 92093

A long Josephson junction can be modeled by a perturbed sine-gordon equation. Based on a soliton perturbation theory, the probability distribution of the velocity of a single soliton, at the presence of a white noise contained in bias current, is studied by the fokker-Planck method. This approach can be extended to the study of multisolitons.

关键词： soliton perturbation perturbed junction contained modeled Planck normalized Langevin formal