Ton Duc Thang University

Ho Chi Minh City, Vietnam

Ton Duc Thang University

Ho Chi Minh City, Vietnam
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Patent
Ton Duc Thang University | Date: 2015-08-17

A smart home system is disclosed which comprises a central camera system; a voice IP unit; a user identification system; a behavioral pattern data server; a plurality of sensors electrically coupled to operate each device based on the distance analysis with respect to each user; a central processing unit; a habit learning unit configured to analyze, interpret, and form a habitual usage profile for each user; and a central switching unit configured to operate each device following instructions from the central processing unit and the habit learning unit.


Patent
Ton Duc Thang University | Date: 2015-08-17

A method and a computer software program for operating a smart home system including a sensor electrically coupled to each device, a central processing unit (CPU), and a data storage is disclosed that includes the steps of receiving attributes of a user, calculating a distance between the user and a device, performing a distance analysis, forming a habitual usage profile using a sequence pattern data mining algorithm, and sending a habitual usage command in accordance with said habitual usage profile.


The new asymptotic behavior of the survival probability of particles in a medium with absorbing traps in an electric field has been established in two ways-by using the scaling approach and by the direct solution of the diffusion equation in the field. It has shown that at long times, this drift mechanism leads to a new temporal behavior of the survival probability of particles in a medium with absorbing traps. © 2017 Author(s).


Tran T.,Ton Duc Thang University
Thin-Walled Structures | Year: 2017

This paper investigates the lateral crushing behavior of multi-cell thin-walled triangular tubes using experiments. More crushing modes are found in the lateral compression experiments of the multi-cell triangular tubes. The average crushing force, Pa, is governed by the plastic hinge lines. Based on experiments and the improved simplified super folding element (ISSFE) theory, theoretical models are proposed to predict average crushing force (Pa) in each stage. The formula of Pa is a function of flow stress of material, wall thickness, and length of tube. The results show that the theoretical solutions agree well with the experiment data. © 2017 Elsevier Ltd


Nguyen-Truong H.T.,Ton Duc Thang University
Journal of Physical Chemistry C | Year: 2015

We derive an analytical formula for the electron inelastic mean free path (IMFP) from its definition within the dielectric formalism. The parameters in this formula are determined solely by the optical energy-loss function of the material of interest. This formula is valid for electrons of energy larger than 500 eV, including relativistic electrons. © 2015 American Chemical Society.


In this paper the interval-valued second-order differential equations under generalized Hukuhara differentiability (ISDEs) are introduced. Under suitable conditions we obtain the existence and uniqueness results of solutions to ISDEs. To prove this assertion we use idea of contraction principle and successive approximations. Furthermore, we use the method based on properties of linear transformations (LTM) to find the explicit solution of initial value problem for linear second-order differential equation with interval-valued forcing function and with interval initial values (IIVP). We apply the linear transformations method to two example problems including a vibrating mass and an electrical circuit. Finally, the method based on the analysis of a solution to real-valued second-order differential equation is investigated to solve interval-valued second-order differential equations with interval-valued coefficients, interval-valued forcing function and interval initial values. Some examples are presented to illustrate applicability of the proposed method. © 2015 Elsevier Inc.


Nguyen-Xuan H.,University of Science | Thai C.H.,Ton Duc Thang University | Nguyen-Thoi T.,University of Science
Composites Part B: Engineering | Year: 2013

We present in this paper a simple and effective formulation based on a fifth-order shear deformation theory (FiSDT) in combination with isogeometric finite element analysis (IGA) for composite sandwich plates. The FiSDT yields non-linear distribution of the transverse shear stresses through the plate thickness and ensures a prior tangential stress-free boundary condition. The IGA uses same basis functions, namely B-splines or non-uniform rational B-splines (NURBS), for preserving the precisely geometric representation and providing the numerical solution. It enables to achieve easily the smoothness with arbitrary continuity order and in the present method the C1-continuity requirement of higher order shear deformation models is fulfilled. The static, dynamic and buckling analysis of rectangular and circular plates is investigated for different boundary conditions. Numerical examples are given to show high accuracy of the proposed method. © 2013 Elsevier Ltd. All rights reserved.


Nguyen V.P.,Ton Duc Thang University | Nguyen-Xuan H.,Ton Duc Thang University
Composite Structures | Year: 2013

Finite element analysis of the delamination process in delaminated composites is addressed using high order Bézier elements relied on the Bernstein polynomials which are commonly used in Computer Aided Design. Laminae of a composite laminate are modeled with two dimensional Bézier elements. Zero-thickness cohesive elements, which are inserted along the interface in between the laminae to model the interface cracking, employ the high order univariate Bernstein basis functions. Quadratic, cubic and quartic Bernstein basis functions are examined. An open source pre-processing code is presented to generate Bézier meshes and interface elements. Implementation of a simple yet highly efficient arc-length solver which is able to trace equilibrium paths having multiple snap-backs is given. Numerical examples are presented for the analyses of benchmark composite delamination problems which include the double cantilever beam, the end notch flexure and the mixed mode bending tests. Additionally multiple delamination analysis of a composite specimen is also presented. Additionally multiple delamination analysis of a composite specimen is also investigated. For all given examples, the highly efficient performance of the proposed formulation is found. © 2013 Elsevier Ltd.


Patent
Ton Duc Thang University | Date: 2015-05-24

A method and apparatus for lifting a patient is disclosed to include a base with wheels on the back side and casters on the front side; a pair of extendable legs extended or withdrawn from the frontal side of the base to maintain balance when lifting a patient; vertical masts connected to a three-prong hanger; three durable cables used with a sling assembly to lift the patient; a foldable chair provides temporary rest for the patient on the patient lift; and a control panel having a micro-controller for remotely controlling the patient lift.


Patent
Ton Duc Thang University | Date: 2014-12-26

A method and apparatus for lifting a patient is disclosed to include a base with wheels on the back side and casters on the front side; a pair of extendable legs extended or withdrawn from the frontal side of the base to maintain balance when lifting a patient; vertical masts connected to a three-prong hanger; three durable cables used with a sling assembly to lift the patient; a foldable chair provides temporary rest for the patient on the patient lift; and a control panel having a micro-controller for remotely controlling the patient lift.

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