• Rực quan hóa dữ liệu mô phỏng động lực học phân tử đối với các chất lỏng cấu trúc mạng (SiO2, GeO2, Al2O3)Rực quan hóa dữ liệu mô phỏng động lực học phân tử đối với các chất lỏng cấu trúc mạng (SiO2, GeO2, Al2O3)

    Tóm tắt Các chất lỏng cấu trúc mạng SiO2, GeO2, Al2O3 đã được nghiên cứu bằng phương pháp mô phỏng động lực học phân tử ở nhiệt độ 3200K trong dải áp suất rộng (từ 0-25 GPa đối với SiO2; 0-48 GPa đối với GeO2 và 0-20 GPa đối với Al2O3). Các kết quả mô phỏng cho thấy cấu trúc của các chất lỏng khi bị nén bao gồm ba pha cấu trúc chủ yếu là TO4, ...

    pdf7 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 342 | Lượt tải: 0

  • An explicit topology optimization method using moving polygonal morphable voids (MPMVs)An explicit topology optimization method using moving polygonal morphable voids (MPMVs)

    ABSTRACT Introduction: Conventional topology optimization approaches are implemented in an implicit manner with a very large number of design variables, requiring large storage and computation costs. In this study, an explicit topology optimization approach is proposed by moving polygonal morphable voids whose geometry parameters are considered...

    pdf5 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 358 | Lượt tải: 0

  • Fusion-Fission in the reactions of the 58Ni + 251Cf and 64Zn + 248Cm combinationsFusion-Fission in the reactions of the 58Ni + 251Cf and 64Zn + 248Cm combinations

    ABSTRACT Introduction: In the present study, we evaluate the nucleon evaporation, alpha decay, and fission widths in the fusion-fission of the 58Ni+251Cf and the 64Zn + 248Cm reactions for the synthesis of the super-heavy 309;312126 nuclei. Methods: The feasibility of the synthesis of the 309;312126 isotopes via the mentioned systems is investig...

    pdf8 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 283 | Lượt tải: 0

  • Lattice constant of ceria thin film: Temperature dependenceLattice constant of ceria thin film: Temperature dependence

    Abstract. The moment method in statistical (SMM) dynamics is used to study the lattice constant of CeO2 thin films taking into account the anharmonicity effects of the lattice vibrations. The nearest neighbor distance and the lattice constant of CeO2 thin films are calculated as a function of temperature. SMM calculations are performed using th...

    pdf9 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 305 | Lượt tải: 0

  • A study of orange photoluminescence in cubic nanocrystals ZnS: Mn2+A study of orange photoluminescence in cubic nanocrystals ZnS: Mn2+

    Abstract. Pure ZnS and Mn2+-doped ZnS nanocrystals were synthesized using the co-precipitation method. ZnS:Mn2+ samples were produced by changing the V/Ti ratio from 0.0 at.% to 4.5 at.%. The ZnS and low doped ZnS:Mn2+ samples are single phase with sphalerite (cubic) crystal structure. The average particle size is about 3 - 5 nm. The optical ab...

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  • Squarks decay into quarks and gluino in the MSSMSquarks decay into quarks and gluino in the MSSM

    Abstract. We present a phenomenological study of the decay of squarks (top and bottom) into quarks (top and bottom) and gluino in the Minimal Supersymmetric Standard Model (MSSM). The formulae for the decay width and numerical results are obtained. We have calculated the conclusion of the one-loop vertex correction, wave-function correction and...

    pdf6 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 298 | Lượt tải: 0

  • The equations of state of asymmetric nuclear matterThe equations of state of asymmetric nuclear matter

    1. Introduction The success of nuclear physics in satisfactorily explaining low and mediate energy nuclear phenomena leads to a strong belief that nucleons and mesons are appropriate degrees of freedom. At present, the relativistic treatment of nuclear many-body systems introduced not long ago by Walecka [1-3] turned out to be a quite successfu...

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  • Using aperture photometry to study Messier 67Using aperture photometry to study Messier 67

    Abstract. Studying star clusters is a way to test theories of stellar evolution in astronomy. Using current theories, the mass, age and components of a star are affected and decide the position of star in the Hertzsprung-Russell color-magnitude diagram. To study the role of mass in stellar evolution, we need to look at star clusters of which al...

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  • Ability to increase a weak electromagnetic wave by confined electrons in doped superlattices in the presence of laser radiation modulated by amplitudeAbility to increase a weak electromagnetic wave by confined electrons in doped superlattices in the presence of laser radiation modulated by amplitude

    Abstract. The analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by confined electrons in the presence of laser radiation modulated by amplitude in doped superlattices (DSL) are obtained by using the quantum kinetic equation for electrons in the case of electron–optical phonon scattering. The d...

    pdf11 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 397 | Lượt tải: 0

  • Real parametric surfaces of bidegree (1, 2) and inverse problems of singularityReal parametric surfaces of bidegree (1, 2) and inverse problems of singularity

    Abstract. In this article we present a complete classification for the parametric surfaces of bidegree (1, 2) over the real field. We also provide some results for the inverse problem: given a segment of a line or twisted cubic curve, we look for a patch (1, 2) which includes this segment as a subset of its singular locus. For instance we chara...

    pdf15 trang | Chia sẻ: thanhle95 | Ngày: 16/07/2021 | Lượt xem: 318 | Lượt tải: 0