Numerical methods

The use of natural-origin active compounds in disease treatment is currently a prevailing trend. Mangiferin, a major component found in mangoes, is present in relatively high proportions. However, mangiferin's disadvantages include low solubility and poor permeability. There are numerous methods available to improve solubility and permeability, among which selfassembly is noteworthy.

10p vinara 11-01-2025 1 0   Download

The authors develop a system of differential equations describing the motion of the structural system equipped with DFP bearings. The Runge-Kutta numerical method, specifically the ode15s function in MATLAB, was used to solve these equations. The results of the calculations provide a comparison of the damping efficiency of the structural system with and without the use of DFP bearings, assessing the effectiveness of vibration isolation during an earthquake, with three components X, Y, and vertical considered.

5p vibenya 31-12-2024 7 1   Download

This research aims to numerically simulate the performance of the tested PC utility poles using Applied Element Method (AEM) and Finite Element Method (FEM). The simulation results demonstrate that both AEM and FEM effectively reproduce the load-displacement relationship observed in the test. Additionally, this study discusses the material models employed in simulations, considering the limitations inherent in numerical modeling.

6p vibenya 31-12-2024 3 1   Download

Chương 3 - Hệ phương trình đại số tuyến tính. Chương này cung cấp cho người học những kiến thức về phương pháp tính trực tiếp và các phương pháp lặp. Nội dung cụ thể gồm: Phương pháp khử Gaussian, quay và tính tỷ lệ - Pivoting and scaling, phương pháp phân ly LU, nghịch đảo ma trận, các hệ chéo bậc 3, phương pháp lặp Jacobi, phương pháp lặp Gauss-Seidel.

28p whocare_d 22-09-2016 110 14   Download

Chương 4 - Các phương pháp cho hàm rời rạc. Chương này trình bày về đa thức nội suy (Polynomial interpolation) và phương pháp bình phương tối thiểu. Nội dung cụ thể gồm có: Nội suy Lagrangian, nội suy Newton, nội suy bậc 3 (Cubic spline interpolation), làm khớp dữ liệu cho các hàm tuyến tính, làm khớp dữ liệu cho các hàm phi tuyến.

24p whocare_d 22-09-2016 95 14   Download

Chương 2 - Giải phương trình đại số phi tuyến. Những nội dungc hính trong chương này gồm: Phương pháp khoanh vùng (Bracketing interval), phương pháp phi đạo hàm (Methods without derivatives), phương pháp đạo hàm (Methods with derivatives).

26p whocare_d 22-09-2016 145 10   Download

Bài giảng Applied numerical methods (Ứng dụng phương pháp tính số) - Chương 1: Tóm lược ngôn ngữ lập trình Fortran 90. Những nội dung chính trong chương này gồm có: Fortran cơ sở, các câu lệnh cơ bản, hàm và thủ tục. Mời các bạn cùng tham khảo.

27p whocare_d 22-09-2016 110 8   Download

In the course of current research the procedure of obtaining of the piecewise linear vibration systems time and frequency responses have been developed. The method is partly analytical and partly numerical and is based on combining of linear solutions of different sections in a cycle of motion. In a row with the method of obtaining of the exact steady state time and frequency response, also it is provided sensitivity analysis of the vibration isolator.

86p runthenight07 01-03-2023 12 3   Download

This thesis investigates the SPH capability available in the commercial Finite Element (FE) code LS-DYNA®, for water impact problems. Experiments have been conducted on rigid wedges impacting water, which were then simulated with the SPH method. Although certain limitations were experienced with the experimental results, a positive correlation was observed with the numerical technique, thus establishing SPH as a promising method for crashworthiness design.

176p runthenight07 01-03-2023 10 3   Download

file:///C:/Users/dangt/Downloads/qhf_2In traditional listening teaching methods in general and, in particular, teaching listening tends to treat students equally. Teachers have tendencies to present the same in-class exercises and activities to all learners and expect the same outcome. In present, with the development of high technology, numerous techniques to teach listening are applied in listening lessons; however, dictation is still a good method to be used to teach listening when it has various implications for educators in terms of classroom instructions.

81p closefriend09 16-11-2021 57 9   Download

The soil-structure interaction problems under seismic loading are researched by numerical and experimental methods. In numerical study, the complication of soil-foundation interaction is simulated by a proposal macro-element.

27p hobbsandshaw 09-06-2021 33 4   Download

Research purposes: We consider some inverse source problems for parabolic equations, focus on three topics: First, we give stability estimates. Second, we propose regularization methods to solve these problems. Third, we set up algorithms and give numerical examples to illustrate the performance of the proposed regularization methods in this thesis.

26p prisonbreak123 21-05-2021 23 4   Download

Although the research direction on NSFD schemes for differential equations have achieved a lot ofresults shown by both quantity and quality of existing research works, real-world situations have always posednew complex problems in both qualitative study and numerical simulation aspects. On the other hand, there aremany differential models that have been established completely in the qualitative aspect but their correspondingdynamically consistent discrete models have not yet been proposed and studied

26p capheviahe29 17-03-2021 28 4   Download

Research indexing method based on R-tree method to increase the efficiency of XPath queries on XML data, through intermediate data converted into numerical coordinates of tags; use the method of converting XML structured text data into numeric data that can be represented on 2-dimensional space (can be extended to many dimensions).

26p capheviahe26 25-01-2021 20 4   Download

Building approximation formulas using equivalentinclusion method to determine the effective values of the conductivity, the elastic modulus of compound-inclusion composite materials and applying numerical methods using finite elements (FE) calculated for some specific material models.

27p capheviahe26 25-01-2021 19 4   Download

In this paper, we investigate the existence, uniqueness and stability of periodic solution of new integro-differential equations depended on special function with singular kernels.

15p lucastanguyen 01-06-2020 13 1   Download

The paper presents the ground effects on the flow over five NACA symmetrical airfoils by analyzing the coefficients of lift. The unbounded flow over a selected airfoil was first simulated, and the results were validated against the established data in order to validate the method used in obtaining the lift coefficients.

8p lucastanguyen 01-06-2020 18 2   Download

Deterministic uncertainty propagation methods are certainly powerful and time-sparing but their access to uncertainties related to the power map remains difficult due to a lack of numerical convergence. On the contrary, stochastic methods do not face such an issue and they enable a more rigorous access to uncertainty related to the PFNS.

5p christabelhuynh 29-05-2020 10 1   Download

The final goal of the work is to provide useful recommendations and guidelines for the design of a cold plug for the emergency draining system of a molten salt reactor. Some numerical thermal simulations were performed with ANSYS mechanical (Finite Element Method) to be compared with results of the experiments and to make extrapolations for a new component to be used in a reactor.

12p christabelhuynh 29-05-2020 40 3   Download

Linear matching method (LMM) is one of the effective numerical methods for the limit and shakedown analysis, which computes the converging upper series by solving iteratively linear elastic analysis with Young’s modulus varying in space.

14p tohitohi 19-05-2020 24 1   Download