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Wyszukujesz frazę "Green function technique" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Coherent potential approximation technique in a simple example of resistivity calculations for binary alloys
Autorzy:
Wołoszyn, M.
Maksymowicz, A. Z.
Powiązania:
https://bibliotekanauki.pl/articles/1931584.pdf
Data publikacji:
2002
Wydawca:
Politechnika Gdańska
Tematy:
Coherent Potential Approximation
Green function technique
binary alloy
density of states
resistivity
Opis:
Technique of the Coherent Potential Approximation applied for calculations of the density of states in binary alloys Ax B(1-x) is presented. Results of the calculations are also used to find the residual resistivity of the system versus concentration x.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2002, 6, 4; 669-680
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Region of existence of multiple solutions for a class of robin type four-point bvps
Autorzy:
Verma, Amit K.
Urus, Nazia
Agarwal, Ravi P.
Powiązania:
https://bibliotekanauki.pl/articles/2052065.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Green’s function
monotone iterative technique
maximum principle
multi-point problem
Opis:
This article aims to prove the existence of a solution and compute the region of existence for a class of four-point nonlinear boundary value problems (NLBVPs) defined as \[ \begin{array}{lr} -u^{\prime\prime}(x) = \psi(x,u,u^{\prime}), & x \in (0,1) \\ u^{\prime}(0) = \lambda_{1}u(\xi), & u^{\prime}(1) = \lambda_{2}u(\eta) \end{array} \] where $I = [0, 1], 0 < \xi \leq \eta < 1 \text{ and } \lambda_{1} ,\lambda_{2} > 0$. The nonlinear source term $\psi \in C(I \times \mathbb{R}^{2}, \mathbb{R})$ is one sided Lipschitz in $u$ with Lipschitz constant $L_{1}$ and Lipschitz in $u^{\prime}$, such that $\vert \psi(x, u, u^{\prime}) - \psi(x, u, v^{\prime})\vert$. We develop monotone iterative technique (MI-technique) in both well ordered and reverse ordered cases. We prove maximum, anti-maximum principle under certain assumptions and use it to show the monotonic behaviour of the sequences of upper-lower solutions. The sufficient conditions are derived for the existence of solution and verified for two examples. The above NLBVPs is linearised using Newton’s quasilinearization method which involves a parameter k equivalent to $\text{max}_{u} \frac{\delta\psi}{\delta_{u}}$. We compute the range of $k$ for which iterative sequences are convergent.
Źródło:
Opuscula Mathematica; 2021, 41, 4; 571-600
1232-9274
2300-6919
Pojawia się w:
Opuscula Mathematica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prediction of ship motions via a three-dimensional time-domain method following a quad-tree adaptive mesh technique
Autorzy:
Zhang, Teng
Ren, Junsheng
Liu, Lu
Powiązania:
https://bibliotekanauki.pl/articles/259860.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Froude-Krylov forces
adaptive mesh technique
analytical
transient free surface Green function
precise integration method
Opis:
A three-dimensional (3D) time-domain method is developed to predict ship motions in waves. To evaluate the Froude- Krylov (F-K) forces and hydrostatic forces under the instantaneous incident wave profile, an adaptive mesh technique based on a quad-tree subdivision is adopted to generate instantaneous wet meshes for ship. For quadrilateral panels under both mean free surface and instantaneous incident wave profiles, Froude-Krylov forces and hydrostatic forces are computed by analytical exact pressure integration expressions, allowing for considerably coarse meshes without loss of accuracy. And for quadrilateral panels interacting with the wave profile, F-K and hydrostatic forces are evaluated following a quad-tree subdivision. The transient free surface Green function (TFSGF) is essential to evaluate radiation and diffraction forces based on linear theory. To reduce the numerical error due to unclear partition, a precise integration method is applied to solve the TFSGF in the partition computation time domain. Computations are carried out for a Wigley hull form and S175 container ship, and the results show good agreement with both experimental results and published results.
Źródło:
Polish Maritime Research; 2020, 1; 29-38
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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