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Besides the computation of implicit representations of parameterizations, in geometric modeling it is of vital importance to have a detailed knowledge of the geometry of the object and of the parametric representation one is working with. The question of how many times is the same point being painted (i.e., corresponds to distinct values of ...
10 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 400 | Lượt tải: 0
Abstract. This study aimed to investigate the structural characteristics of iron oxide nanoparticles (IONPs) prepared in different conditions. IONPs were synthesized as aqueous magnetic fluids by co-precipitation of ferrous and ferric salts, then analyzed by transmission electron microscopy (TEM), X-ray diffraction (XRD), and Raman scattering sp...
6 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 409 | Lượt tải: 0
Abstract. To reveal the origin of the (ZrO2)n (n = 1 ÷ 11) cluster stability and to study the structural trends in the zirconium oxide neutral cluster distribution, (ZrO2)n clusters have been constructed and calculated employing Density Functional Theory (DFT). In this work, we calculate the formation energy, electronic structures, stabilities a...
8 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 511 | Lượt tải: 0
Abstract. In this work, we investigate the phase diagram of a three-dimensional Lennard-Jones (LJ) and square-well (SQW) system by means of both standard Monte Carlo simulation (SPMC) and “virtual-move” Monte Carlo simulations (VMMC). We find that the phase diagrams obtained by both SPMC and VMMC are very similar. However, there exist a few sig...
8 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 462 | Lượt tải: 0
1. Introduction There are many theoretical and experimental works on thermodynamic and elastic properties of metals and interstitial alloys [1-27], for examples the theory of interstitial alloys [1, 2], the calculations from first principles, the many-body potentials, the molecular dynamics for defects in metals, alloys and solid solutions [3-5], t...
10 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 391 | Lượt tải: 0
1. Introduction When the object is deformed, its properties change, especially its mechanical properties. There are two types of deformation: elastic deformation and nonlinear deformation. When the load is too large, the object will be deformed nonlinearly and the material itself will have a residual deformation. Nonlinear deformation causes ma...
9 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 449 | Lượt tải: 0
Abstract. We use the concept of approximation introduced by D.T. Luc et al. [1] as a generalized derivative for non-Lipschitz vector functions to consider vector problems with non-Lipschitz data under inclusion constraints. Some calculus of approximations are presented. A necessary optimality condition, a type of KKT condition, for local efficie...
11 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 422 | Lượt tải: 0
Abstract. In this work, we investigate the phase diagram of a single-component system of colloidal particles and a binary mixture of hard-core droplets and colloids using means of molecular dynamics. For the former case, we found a variety of different crystal phases, in a good agreement with these observed in the simulation work (Engel et al, N...
10 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 407 | Lượt tải: 0
1. Introduction Bose-Einstein condensate (BEC) has been attracting the attention of many researchers in both theory and experiment. The creation of BEC in the laboratory and recent results has created a great prospect for this promising field [1-4]. One of the basic problems for BEC researchers is to determine the state of the system. In the no...
8 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 425 | Lượt tải: 0
Abstract. Based on the extended Nambu-Jona-Lasinio model with the scalar-vector eight-point interaction [11], we consider a question to understand of what ultimately happens to exact chiral nuclear matter as it is heated. In the realm of very high temperature the fundamental degrees of freedom of the strong interaction, quarks and gluons, come i...
11 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 379 | Lượt tải: 0