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Journal of Semiconductors 2011年第11期32卷 31-38页

作者： M.r.Fadavieslam N.Shahtahmasebi M.rezaee-roknabadi M.M.Bagheri-Mohagheghi Nanotechnology research Center Department of PhysicsFaculty of Basic SciencesFerdowsi University of MashhadMashhadIran School of Physics Damghan University

Tin sulfide thin films （Snx Sy） with an atomic ratio of y/x = 0.5 have been deposited on a glass substrate by spray pyrolysis. The effects of deposition parameters, such as spray solution rate （r）, substrate temperature （Ts） and film thickness （t）, on the structural, optical, thermo-electrical and photoconductivity related properties of the films have been studied. The precursor solution was prepared by dissolving tin chloride （SnC14, 5H2O） and thiourea in propanol, and SnxSy thin film was prepared with a mole ratio of y/x = 0.5. The prepared films were characterized by X-ray diffraction （XrD）, scanning electron microscopy （SEM） and UV-vis spectroscopy. It is indicated that the XrD patterns of SnxSy films have amorphous and polycrystalline structures and the size of the grains has been changed from 7 to 16 nm. The optical gap of SnxSy thin films is determined to be about 2.41 to 3.08 eV by a plot of the variation of （αhv）2 versus h v related to the change of deposition conditions. The thermoelectric and photo-conductivity measurement results for the films show that these properties are depend considerably on the deposition parameters.

关键词： thin film tin sulfide spray pyrolysis photoconductivity

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On solitary wave in nonuniform shear currents

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作者： Lucas George r.

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Journal of Hydrodynamics 2020年第4期32卷 800-805页

作者： Zhan Wang Bin-bin Zhao Wen-yang Duan r.Cengiz Ertekin Masoud Hayatdavoodi Tian-yu Zhang College of Shipbuilding Engineering Harbin Engineering UniversityHarbin 150001China Department of Ocean and resources Engineering University of HawaiiHonoluluUSA Civil Engineering Department School of Science and EngineeringUniversity of DundeeDundeeUK

In this paper,steady solutions of solitary waves in the presence of nonuniform shear currents are obtained by use of the high-level Green-Naghdi(HLGN)*** focus on large-amplitude solitary waves in strong opposing shear *** linear-type currents,quadratic-type currents and cubic-type currents are *** particular,the wave speed,wave profile,velocity field,particle trajectories and vorticity distribution are *** is demonstrated that presence of the nonuniform shear current modifies the velocity field and vorticity field of the solitary wave.

关键词： Solitary wave nonuniform shear current velocity field particle trajectories vorticity field

MATrIX ANALYSIS ON LEADING TErM OF CONDITION NUMBEr FOr ADDITIVE SCHWArZ METHODS

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Journal of Computational Mathematics 2001年第2期19卷 157-166页

作者： Jia-chang Sun (r & D Center of Paraller Software, Laboratory for Computer Science, Institute of Software, Chinese Academy of Sciences) 中科院软件所

It is well known the order of preconditioned matrix by using additive Schwarz methods. In order to estimate the resulted PCG iteration counts, the related leading term brfore the order is given in this paper.

关键词： additive Schwarz method PCG matrix analysis

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Foucault, Douglass, Fanon, and Scotus in dialogue

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Foucault, Douglass, Fanon, and Scotus in dialogue

Microstructure and mechanical properties of friction welded carbon steel(EN24) and nickel-based superalloy(IN718)

作者： Nielsen Cynthia r.

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International Journal of Minerals,Metallurgy and Materials 2021年第1期28卷 111-119页

作者： V.T.Gaikwad M.K.Mishra V.D.Hiwarkar r.K.P.Singh Kalyani Centre for Technology and Innovation Bharat Forge LimitedPune 411036India Department of Materials Engineering Defense Institute of Advance TechnologyPune 411025India

Continuous-drive rotary friction welding was performed to join cylindrical specimens of carbon steel(EN24) and nickel-based superalloy(IN718), and the microstructures of three distinct weld zones—the weld interface(WI)/thermo-mechanically affected zone(TMAZ),the heat-affected zone(HAZ), and the base metal—were *** joint was observed to be free of defects but featured uneven flash *** backscatter diffraction(EBSD) analysis showed substantial changes in high-angle grain boundaries, low-angle grain boundaries, and twin boundaries in the TMAZ and ***, significant refinement in grain size(2 –5 μm) was observed at the WI/TMAZ with reference to the base *** possible causes of these are *** microhardness profile across the welded joint shows variation in *** changes in hardness are ascribed to grain refinement, phase transformation, and the dissolution of strengthening *** tensile test results reveal that a joint efficiency of 100% can be achieved using this method.

关键词： friction welding dissimilar metals EN24 IN718 microstructure mechanical properties

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ESTIMATION OF rELATIVE BLOOD VOLUME IN HEAD AND NECK TUMOrS

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作者： r.·祖贝

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波谱学杂志 2002年第1期19卷 101-102页

作者： r.H.WU r.Bruening J.MA C.BErCHTENBrEITHEr r.JUND H.B.rAO X.H.XU M.rEISEr Shantou University Medical College China Klinikum GrosshadernUniversity of MunichGermany Klinikum Grosshadern University of MunichGermany Dalian Medical University China Shantou University Medical College China

Introduction: The calculation of relative blood volume in head and neck tumor with Mr imaging is anew approach that may provide additional hemodynamic information relevant to both untreated and treated tumors. This hemodynamic information is especially useful for the differentiation between viable tumor and postsurgical changes or radiation induced scar, and is also beneficial for tumor staging and tumor biopsy.

关键词： maps ESTIMATION OF rELATIVE BLOOD VOLUME IN HEAD AND NECK TUMOrS

Compressively-strained GaSb nanowires with core-shell heterostructures

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Nano research 2020年第9期13卷 2517-2524页

作者： Zhongyunshen Zhu Johannes Svensson Axel r.Persson reine Wallenberg Andrei V.Gromov Lars-Erik Wernersson Departm ent of Electrical and Information Technology Lund UniversityBox 11822100 LundSweden Centre for Analysis and Synthesis Lund UniversityBox 12422100 Lundt Sweden NanoLund Lund UniversityBox 11822100 LundSweden EaStCHEM School of ChemistryUniversity of EdinburghEdinburgh EH93FJUK

GaSb-based nanowires in a gate-all-around geometry are good candidates for binary p-type transistors,however they require the introduction of compressive strain to enhance the transport ***,we for the first time demonstrate epitaxial GaSb-GaASxSb1-x core-shell nanowires with a compressively strained *** axial and hydrostatic strain in GaSb core have been measured by X-ray diffraction(XrD)and raman scattering,*** optimal sample,almost without plastic relaxation,has an axial strain of-0.88%and a hydrostatic strain of-1.46%,leading to a noticeable effect where the light hole band is calculated to be 33.4 meV above the heavy hole band at the *** valence band feature offers more light holes to contribute the transport process,and thus may provide enhanced hole mobility by reducing both the interband scattering and the hole effective *** results show that lattice-mismatched epitaxial core-shell heterostructures of high quality can also be realized in the promising yet demanding GaSb-based system.

关键词： compressive strain GaSb-GaAsxSbi-x core-shell nanowires heterostructure p-type transistors

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数理经济学(上)