Theory and Method

Turbines are the most common devices used in the field of wind energy and tidal energy. They are also the main research objectives of scientists worldwide. Different research methods are applied to study these devices, including the numerical simulation method. This is an advanced approach that helps to save costs of calculation, but it still keeps the accuracy.

9p viling 11-10-2024 2 1   Download

This research investigates the challenges and incentives that drive undergraduate students to engage in scientific inquiry. Subsequently, in accordance with this theoretical framework, “Tinto’s Persistence Theory” a model of approaches was generated to encourage undergraduate students in Vietnam to do more high-quality scientific research.

7p vifilm 11-10-2024 3 1   Download

The composite girder, which combines a steel beam with an ultra-highperformance concrete (UHPC) slab, has gained significant attention in recent years as a new type of bridge structure. However, accurately estimating the bending capacity of such girders remains a challenge, as practical methods are limited. In this article, the authors propose a theoretical approach based on the Euler-Bernoulli beam theory to determine the bending capacity of composite girders.

10p vibecca 01-10-2024 2 2   Download

This work is devoted to conducting a new study for global dynamics and numerical simulation of a discrete-time computer virus propagation model, which was constructed in our recent work. By utilizing well-known results on asymptotic stability of discrete-time dynamical systems, we establish the global asymptotic stability of a unique viral equilibrium point, whereas only its local asymptotic stability was previously analyzed.

8p viyoko 01-10-2024 6 1   Download

The main aim of this work is to use a finite element method (FEM) based on Shi’s third-order shear deformation plate theory (TSDT) to study the dynamic response of sandwich plates subjected to consecutive blast loading. The sandwich plate has an auxetic honeycomb core and two different functionally graded materials (FGMs) skin layers (so-called h-FGS plates).

14p viyoko 01-10-2024 2 1   Download

This article introduces a finite element approach for examining the static bending behavior of composite plates. The method considers the variable mechanical characteristics of plates and utilizes an elastic foundation with varying stiffness values.

12p viyoko 01-10-2024 3 1   Download

In this paper, the bending and warping shears are considered. The main novelty of this paper is to apply a Ritz solution for the buckling analysis of thin-walled composite beams. The governing equations are derived by using Lagrange’s equations.

11p vifilm 24-09-2024 4 1   Download

In this paper, free vibration of bidirectional functionally graded sandwich (BFGSW) beams is studied by using a finite element formulation. The beams made from three distinct materials are composed of three layers, a homogeneous core and two bidirectional FGM face layers with material properties varying in both the thickness and longitudinal directions by power gradation laws.

15p vifilm 24-09-2024 2 1   Download

This paper presents a numerical approach for static bending and free vibration analysis of the functionally graded porous plates (FGPP) resting on the elastic foundation using the refined quasi-3D sinusoidal shear deformation theory (RQSSDT) combined with the Moving Kriging–interpolation meshfree method.

19p vifilm 24-09-2024 2 1   Download

This article presents a semi-analytical finite strip method based on Marguerre’s shallow shell theory and Kirchhoff’s assumption. The formulated finite strip is used to study the buckling behavior of thin-walled circular hollow sections (CHS) subjected to uniform bending.

11p vifilm 24-09-2024 2 1   Download

In this study, the Ritz variational method is used to analyze and solve the bending problem of rectangular functionally graded material plate with general boundary conditions and subject to some types of load distribution over the entire plate domain. Based on the Kirchoff plate theory, the equilibrium equations are obtained by minimizing the total potential energy.

12p viyoko 24-09-2024 2 1   Download

This study proposes a novel and efficient surrogate model for performing truss analysis based on graph theory and deep learning algorithms, which is applicable for various truss topologies with different load scenarios without requiring retraining as other Deep Learning (DL)-based counterparts.

11p vifaye 20-09-2024 4 1   Download

This article focuses on the social judgment theory and its application to examine consumer reactions to businesses. For businesses that apply green marketing strategies in their operations, consumer judgment has different characteristics, which moderates and alters the intention and behaviour of consuming green products. This study applied the documentary method, combining synthesis and evaluation to reveal that consumers often have psychological judgments about the reality of businesses that are implementing a sustainable development strategy.

10p toduongg 24-08-2024 3 1   Download

The novelty of this study is to introduce a framework and virtual community business model for CRT based on the theories of virtual communities. The author uses qualitative research methods, collects and analyzes secondary data through websites business, social networks, the internet, magazines, specialized articles, organizations and associations. Research results show that an virtual community business model for the CRT using the Business Model Canvas tool.

20p toduongg 24-08-2024 4 2   Download

This research study investigates the motivation for English language learning among undergraduate students at the University of Transport and Communications (UTC). The study adopts a mixed-methods approach, combining qualitative and quantitative methods to gather data. It includes a literature review on motivation theories, language learning, and questionnaire surveys. Content analysis is used for qualitative data, while descriptive and inferential statistics are used for quantitative data analysis.

7p tuongbachxuyen 05-08-2024 3 1   Download

In this work, the free vibration analysis of Timoshenko microbeams made of the Functionally Graded Material (FGM) on the Winkler–Paternak elastic foundation based on the Modified Coupled Stress Theory (MCST) is investigated. Material characteristics of the beam vary throughout the thickness according to the power distribution and are estimated though Mori–Tanaka, Hashin–Shtrikman and Voigt homogenization techniques.

13p dianmotminh02 03-05-2024 9 3   Download

This article presents computational insights into the geometric and electronic structures of NbSi4 −/0 clusters using density functional theory and the CASSCF/CASPT2 method. The anionic and neutral ground states are identified as the 1A′ and 2A′ states, respectively, within a trigonal bipyramidal isomer where the Nb atom occupies the equatorial position. The adiabatic detachment energy for the transition from the anionic ground state 1A′ to the neutral ground state 2A′ is estimated to be 2.30 eV.

8p dianmotminh02 03-05-2024 5 2   Download

The dynamic analysis is a necessity in the design, manufacturing and maintenance of structures. The analytic solutions are not available for most practical cases and the Finite Element Method (FEM) is not reliable due to the joint problem, unclear loading, material properties and numerical error. In this paper, we present a way to find modes shape of 3D Frame by FEM program using Matlab.

8p vidoctorstrange 06-05-2023 7 3   Download

The aim of this research was to examine if a visual based training method could improve badminton player's decision making and in game performance. This research comprises a collection of research problems relating 10 visual based training, digital learning and general tau theory in relation 10 badminton.

183p runthenight05 01-03-2023 7 3   Download

This project will investigate of the effects of applying scientific modes of analysis to the process of artistic production. Methodologies derived from the disciplines of classification and taxonomy will be used to examine the formal relationships between sculptural objects in respect to their conceptual and actual development. Evolutionary theory will be used as a model in this analysis. The project will investigate the complexity of the system and explore the effect of the intervention of scientific methods on artistic production.

296p runthenight07 01-03-2023 6 3   Download