Identifying the source for Fractional diffusion equations with Random Gaussian white noise
By Ngo Ngoc Hung, Tran Thanh Binh, Nguyen Duc Phuong
In this work, we study the problem of finding the source function of the inhomogeneous
diffusion equations with conformable derivative c∂α
t u−Δu = f(x), 0 < α < 1, associate
with random noisy input data. This problem is ill-posed in the sense of Hadamard. In
order to regulate the instablity of the solution, ...
Inverse source problem for Sobolev equation with observed data in Lb spaces
By Le Dinh Long, Danh Hua Quoc Nam, Vo Ngoc Minh, Bui Dai Nghia
In this paper, we are interested in the problem of determining the source function forthe
Sobolev equation with fractional Laplacian. This problem is non-well-posed. We show theerror
estimate between the exact solution and the regularized solution with the observed data in Lb
spaces.
Asymptotic expansion associated with the Kirchhoff-Carrier- Love equation
By Vo Thi Tuyet Mai, Le Huu Ky Son, Tran Thi Kim Thoa
In this paper, we consider the Dirichlet boundary problem for a nonlinear wave equation
of Kirchhoff-Carrier-Love type as follow
utt − B
?
∥u(t)∥2 , ∥ux(t)∥2
(uxx + uxxtt)
= f(x, t, u, ux, ut, uxt) +
Xp
i=1
εifi(x, t, u, ux, ut, uxt)
for 0 < x < 1, 0 < t < T,
u(0, t) = u(1, t) ...
On the Robin-Dirchlet problem for a nonlinear wave equation with the term 1 n Xn i=1 u2(i−1 n , t)
By Nguyen Vu Dzung, Tran Trinh Manh Dung
In this paper, we study the Robin-Dirchlet problem (Pn) for a wave equation with the
term
1
n
Xn
i=1
u2( i−1
n , t), n ∈ N. First, for each n ∈ N, under suitable conditions, we prove
the local existence and uniqueness of the weak solution un of (Pn). Next, we prove that
the sequence of solutions ...
High-order iterative scheme to the Robin problem for a nonlinear wave equation with viscoelastic term
By Doan Thi Nhu Quynh, Ho Thai Lyen, Huynh Ai Trieu, Nguyen Thanh Sang
The report deals with the Robin problem for a nonlinear wave equation with viscoelastic
term. Under some suitable conditions, we establish a high-order iterative scheme and
then prove that the scheme converges to the weak solution of the original problem along
with the error estimate. This result extends the result in [9].
The Dirichlet problem for a wave equation of Kirch-hoff- Carrier type with a nonlinear viscoelastic term
By Ly Anh Duong, Le Huu Ky Son, Le Thi Phuong Ngoc
In this paper, we consider the Dirichlet problem for a wave equation of Kirchhoff-
Carrier type with a nonlinear viscoelastic term. It consists of two main parts. In Part
1, we establish existence and uniqueness of a weak solution by applying the Faedo-
Galerkin method and the standard arguments of density corresponding to ...
Global solutions to a time-fractional Cauchy problem
By Nguyen Dinh Huy, Nguyen Anh Tuan
In the current work, we study a Cauchy problem for a time-fractional pseudo-parabolic
equation with a globally Lipschitz source term. We prove the unique existence of a mild
solution to the problem, by the common Banach fixed point theorem. This solution is
then verified that exists globally in time by Gr¨onwall’s inequality. Compare ...
Application of fast Fourier transform method to ill-posed problem in image processing
By Nguyen Huu Can, Nguyen Van Tien, Mai Quang Vinh
In this work, we focus on investigating ill-posed problems (according to the definition
given by Hadamard) in the topic of its application. Specifically, we present some theories
about the properties of the ill-posed problem in image processing. By using discrete
Fourier transform and fast Fourier transform methods, we present several results on
image processing ...
Existence and general decay estimates of the Dirichlet problem for a nonlinear Kirchhoff wave equation in an annular with viscoelastic term
By Le Huu Ky Son, Nguyen Le Thi
This paper is devoted to the study of a Kirchhoff wave equation with a viscoelastic
term in an annular associated with homogeneous Dirichlet conditions. At first, by
applying the Faedo-Galerkin, we prove existence and uniqueness of the solution of the
problem considered. Next, by constructing Lyapunov functional, we establish a sufficient
condition such that ...
On the Neumann-Dirichlet problem for a system of nonlinear viscoelastic equations of Kirchhoff type with Balakrishnan- Taylor term
By Bui Duc Nam, Huynh Van Dung, Le Tuan Khai
In this paper, the Neumann-Dirichlet boundary problem for a system of nonlinear viscoelastic
equations of Kirchhoff type with Balakrishnan-Taylor term is considered. At
first, a local existence is established by the linear approximation together with the Faedo-
Galerkin method. Then, by establishing several reasonable conditions and suitable energy
inequalities, the solution of the problem ...
General decay and lifespan of solutions for a system of nonlinear pseudoparabolic equations with viscoelastic term
By Khong Thi Thao Uyen, Nguyen Anh Triet, Le Thi Phuong Ngoc
In this paper, we consider the Robin-Dirichlet problem for a system of nonlinear pseudoparabolic
equations with viscoelastic term. By the Faedo-Galerkin method, we first prove
the existence and uniqueness of solution for the problem. Next, we give a sufficient condition
to get the global existence and decay of the weak solution. Finally, by ...
Cultural exchanges and Zen Buddhism in Sino poetries of Vietnamese envoys to China from the late 18th to early 19th century
By Lê Sỹ Đồng
Abstract
Cultural relations between Vietnam and China, of course, need no further assertions. But this process of cultural relations, then requires further studies to see the diversity of this cultural relationship. We, in this report, present the cultural relationship between Vietnam and China through poems written on the topic of Zen ...
Application of TOPSIS and AHP methods to select a wastewater treatment technology for Poong In Vina Factory
By Dang Tuan Hai, Nguyen Hien Than, Nguyen Huynh Anh Tuyet
Selecting wastewater treatment technology is not an easy matter. In this study, TOPSIS and AHP methods are used to support decision-making in choosing a wastewater treatment alternative for Poong In Vina factory. A total of 9 criteria belonging to 3 groups of economic, social - technical and environmental issues were ...
Comparing the potential treatment of biogas effluent by two artificial wetland wastewater treatment systems
By Hồ Bích Liên
subjects in many countries and the treatment of breeding waste has to be taken as a priority. Nowadays, biogas technology sets up and operates primarily to treat breeding waste. However, this technology formed a considerable amount of wastewater the effluent quality is still poor and the concentration of pollutants is ...
Learners’ attitudes towards the project works in promoting English learner autonomy: A case study at Foreign Trade University - Ho Chi Minh City Campus
By Dang Thi My Dung, Nguyen Ngoc Tran
This study which entitles “Learners’ Attitudes towards the Project Works in promoting English learner autonomy: a Case Study at Foreign Trade University-Ho Chi Minh Campus” was conducted with the following objectives: (1) to investigate students’ attitudes towards the use of project works to enhance their autonomous learning in an English ...
An investigation into common errors in Vietnamese-English translation made by college freshmen: A case study at Foreign Trade University - Ho Chi Minh Campus
By Dang Thi My Dung, Nguyen Ngoc Tran
This study aims to investigate students’ common errors in Vietnamese-English translation. For the objectives, 70 first-year students at Foreign Trade University – Ho Chi Minh campus, were invited to participate in this study. To identify students’ errors in Vietnamese-English translation, the participants were asked to complete five weekly assignments. The ...
Motivation for learning English of Thu Dau Mot University’ students
By Nguyen Van Hung
This paper aims to identify the English-learning motivation of Thu Dau Mot University’s students. Based on the questionnaire, the data for analysis were collected from more than 100 students of different majors studying non-majored English at Thu Dau Mot University’s Foreign Language Center. The findings show that students have relatively ...
An investigation into difficulties in listening and speaking English as a foreign language
By Nguyen Phuong Duy Anh, Nguyen Thi Huynh Nga
In this study, we examine students at Thu Dau Mot University specializing in Food Technology’s speaking and listening skills in English. We conducted a survey on 59 students majoring in Food Technology using the questionnaire approach. Students struggle to develop macro-English abilities like speaking and listening, as seen by their ...
Research how to establish a policy to respond to climate change in Vietnam
By Tran Cam Thi, Bui Pham Phuong Thanh
As a response to global warming and climate change, climate change adaptation aims to lessen the susceptibility of social and biological systems to relatively abrupt change and so counteract the effects of global warming. Openness and cooperation are key tenets of an adaptation strategy; as a result, mechanisms for a ...
Application of FMEA methods in Minh Duong furniture company in Vietnam
By Nguyen Vuong Bang Tam
This paper aims to apply FMEA (Failure Mode and Effect Analysis) tool in the wood production process of Minh Duong Wood Company. In this study, the process evaluation indicators according to FMEA were analyzed such as failure severity - S (Severity value), failure frequency - O (Occurrence number), error detection ...
Specification, design, and simulation of mechanical horses following the opinion of Khong Minh in the novel “Three Kingdoms”
By Ngo Bao, Tran Thi Vinh
This article presents how to speculate, design and simulate a mechanical horse based on the point of view of the military man Khong Minh, a talented character in the work "Three Kingdoms" (author La Quan Trung). The behavior of this type of horse closely resembles that of a real horse. ...
Iodine and selected goitrogens measured in soil and grains of Sokoto zones, Nigeria
By Yusuf Sarkingobir, Umar AI, Fatima Abubakar Gidadawa, Yusuf Yahaya Miya
The objective of this study was to determine iodine levels in soils, grains, and goitrogenic content of common grains across zones of Sokoto state, Nigeria using standard methods and reagents of analytical grade. Obtained data were subjected to descriptive and ANOVA statistics. The Western zone has highest iodine (29±0.01ppm), followed ...
Based on research methods such as methods such as data collection and processing, air quality index calculation methods, public health risk assessment methods to assess air quality and effects of substances on the health of people in Di An city. The data for the calculation are inherited from the environmental ...
Exploiting the international cooperation environment to develop high–quality human resources in Binh Duong province (2010-2022)
By Phạm Ngọc Trâm
The international cooperation environment is the issue affecting international cooperation relations, creating interactions between it and international cooperation relations. There are two types of international cooperation environment: the external environment and the internal environment. Based on the analysis of the international cooperation environment in Binh Duong over the past decade, ...
Simulating the physical layer security performance of underlay cognitive energy-harvesting relay radio networks
By Đo Đac Thiem
ABSTRACT
This paper analyzes the security performance of underlay cognitive energy-harvesting relay radio networks (UCEHRRN) through the Monter-Carlo simulation results. The results clarify the influence of critical operating parameters on the security performance of the system. Furthermore, the security capabilities of UCEHRRN have been compared with those of the live transmission ...
Water quality assessment using water quality index: a case of the Dong Nai river- sections flow through Bien Hoa city
By Le Thi Pho
Over the past few years, there are many activities had negative impacts on the surface water of the Dong Nai river such as industry, agriculture, and service development activities; therefore river water quality is significantly relieved. This study was conducted to evaluate the effect of elements on the water quality ...
Application of the DPSIR model to assess the current status of solid waste management in Binh Hoa, Thuan An, Binh Dương province
By Le Thi Dao
Through analysis of the DPSIR model, combined with research methods such as field surveys, and survey questionnaires, the author has given the following results: The amount of waste is increasing; Not paying attention to the classification at source, Solid waste collection is still limited; Environmental quality is degraded due to ...
Binh Duong: Learning about the historical and cultural significance of the area's prehistoric past and its geography
By Pham Van Thinh
Binh Duong is a province in the Southeast region. It has a long history of growth and numerous noteworthy historical and cultural values. This paper provides a summary of the cultural and historical significance of Binh Duong Province during the prehistoric, land exploration, and settlement phases. It discusses population, administrative ...
The absorption and accumulation of lead in dracaena sanderiana plant
By Ho Bich Lien
Heavy metals are the most dangerous substances in the environment, have caused deleterious effect not only to the environment but also to the public’s health. Different studies have demonstrated that plants have a high removal capacity for lead ions from pollution sources. However, these plant species were rather limited. Thus, ...