oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 460 )

2018 ( 817 )

2017 ( 751 )

2016 ( 1105 )

Custom range...

Search Results: 1 - 10 of 461665 matches for " A. Barari "
All listed articles are free for downloading (OA Articles)
Page 1 /461665
Display every page Item
Application of He's homotopy perturbation method to nonhomogeneous parabolic problems
A. Barari,A. R. Ghotbi,T. Barari,D. D. Ganji
International Journal of Applied Mathematics and Computation , 2009,
Abstract: In this paper, the solutions of the one dimensional non-homogeneous parabolic equations with a variable coefficient. are obtained by means of homotopy perturbation method (HPM). HPM results show good approximation with the exact solution.
ANALYSIS OF DIFFUSION PROBLEMS USING HOMOTOPY PERTURBATION AND VARIATIONAL ITERATION METHODS
A. Barari, A. Tahmasebi Poor, A. Jorjani & H. Mirgolbabaei
International Journal of Research and Reviews in Applied Sciences , 2010,
Abstract:
Numerical analysis of Richards' problem for water penetration in unsaturated soils
A. Barari,M. Omidvar,A. R. Ghotbi,D. D. Ganji
Hydrology and Earth System Sciences Discussions , 2009,
Abstract: Unsaturated flow of soils in unsaturated soils is an important problem in geotechnical and geo-environmental engineering. Richards' equation is often used to model this phenomenon in porous media. Obtaining appropriate solution to this equation therefore provides better means to studying the infiltration into unsaturated soils. Available methods for the solution of Richards' equation mostly fall in the category of numerical methods, often having restrictions for practical cases. In this research, two analytical methods known as Homotopy Perturbation Method (HPM) and Variational Iteration Method (VIM) have been successfully utilized for solving Richards' equation. Results obtained from the two methods mentioned show a remarkably high precision in the obtained solution, compared with the existing exact solutions available.
Assessment of water penetration problem in unsaturated soils
A. Barari,M. Omidvar,A. R. Ghotbi,D. D. Ganji
Hydrology and Earth System Sciences Discussions , 2009,
Abstract: Unsaturated flow of soils in unsaturated soils is an important problem in geotechnical and geo-environmental engineering. Richards' equation is often used to model this phenomenon in porous media. Obtaining proper solution to this equation therefore provides better means to studying the infiltration into unsaturated soils. Available methods for the solution of Richards' equation mostly fall in the category of numerical methods, often having restrictions for practical cases. In this research, two analytical methods known as Homotopy Perturbation Method (HPM) and Variational Iteration Method (VIM) have been successfully utilized for solving Richards' equation. Results obtained from the two methods mentioned show a remarkably high precision in the obtained solution, compared with the existing exact solutions available.
Solving Ratio-Dependent Predator-Prey System with Constant Effort Harvesting Using Homotopy Perturbation Method
Abdoul R. Ghotbi,A. Barari,D. D. Ganji
Mathematical Problems in Engineering , 2008, DOI: 10.1155/2008/945420
Abstract: Due to wide range of interest in use of bioeconomic models to gain insight into the scientific management of renewable resources like fisheries and forestry, homotopy perturbation method is employed to approximate the solution of the ratio-dependent predator-prey system with constant effort prey harvesting. The results are compared with the results obtained by Adomian decomposition method. The results show that, in new model, there are less computations needed in comparison to Adomian decomposition method.
An Approximate Solution for Boundary Value Problems in Structural Engineering and Fluid Mechanics
A. Barari,M. Omidvar,D. D. Ganji,Abbas Tahmasebi Poor
Mathematical Problems in Engineering , 2008, DOI: 10.1155/2008/394103
Abstract: Variational iteration method (VIM) is applied to solve linear and nonlinear boundary value problems with particular significance in structural engineering and fluid mechanics. These problems are used as mathematical models in viscoelastic and inelastic flows, deformation of beams, and plate deflection theory. Comparison is made between the exact solutions and the results of the variational iteration method (VIM). The results reveal that this method is very effective and simple, and that it yields the exact solutions. It was shown that this method can be used effectively for solving linear and nonlinear boundary value problems.
Non-linear vibration of Euler-Bernoulli beams
Barari, A.;Kaliji, H.D.;Ghadimi, M.;Domairry, G.;
Latin American Journal of Solids and Structures , 2011, DOI: 10.1590/S1679-78252011000200002
Abstract: in this paper, variational iteration (vim) and parametrized perturbation (ppm) methods have been used to investigate non-linear vibration of euler-bernoulli beams subjected to the axial loads. the proposed methods do not require small parameter in the equation which is difficult to be found for nonlinear problems. comparison of vim and ppm with runge-kutta 4th leads to highly accurate solutions.
Determination of Morphological Characteristics Affected by Different Agronomical Treatments in Rice (IR6874-3-2 Promising Line)
D. Barari Tari,H. Pirdashti,M. Nasiri,A. Gazanchian
Asian Journal of Plant Sciences , 2007,
Abstract: In order to study the effects of transplanting date, planting spaces and nitrogen fertilization on morphological characteristics of rice promising line a field experiment was carried out in the Rice Research Institute of Iran (Amol). Experimental design was arranged in a split plot factorial in basis of completely randomized block design with three replications. Some agronomical traits such as panicle length, grain number per panicle, filled grains percentage, 1000 grains weight, fertile tiller numbers, flag leaf area, flag leaf angle, grain yield and harvest index were measured. Results showed that the effect of transplanting date on grain number per panicle was significant at 0.01 probability level. Also the effect of planting spaces on grain number per panicle and fertile tiller was significant at 0.05 and 0.01 probability level, respectively. Nitrogen fertilizer levels had significant effect on, flag leaf area, flag leaf angle, panicle length, 1000 grains weight and grain yield. According to results, 1000 grains weight, harvest index and filled grains percentage had the most correlation with grain yield, respectively. For this line, transplanting date at May 12, planting space at 20x20 cm and 115 kg N ha-1 for the best performance of yield attributes were recommended.
Explicit Solution of Nonlinear ZK-BBM Wave Equation Using Exp-Function Method
J. Mahmoudi,N. Tolou,I. Khatami,A. Barari
Journal of Applied Sciences , 2008,
Abstract: This study is devoted to studying the (2+1)-dimensional ZK-BBM (Zakharov-Kuznetsov-Benjamin-Bona-Mahony) wave equation in an analytical solution. The analysis is based on the implementation a new method, called Exp-function method. The obtained results from the proposed approximate solution have been verified with those obtained by the extended tanh method. It shows that the obtained results of these methods are the same; while Exp-function method, with the help of symbolic computation, provides a powerful mathematical tool for solving nonlinear partial differential equations of engineering problems in the terms of accuracy and efficiency.
Analyzing Latent Topics in Student Confessions Communities on Facebook
Soubhik Barari
Computer Science , 2015,
Abstract: In recent years, confessions pages have grown popular on social media sites such as Facebook and Twitter, particularly within college communities. Such pages allow users to anonymously submit confessions related to collegiate experience that are subsequently publicly broadcasted. Because of the anonymous nature of disclosure, we believe that confessions pages are novel data sources from which to discover trends and issues in a collegiate community. Aggregating a dataset of more than 20,000 posts from one such page, we analyze natural language characteristics of the originating community with LDA, pointwise mutual information and sentiment analysis. Using a Markov topic model, we examine the latent topics in our corpus and find that loneliness is a highly regular pattern. Our findings on student confession communities support contemporary sociological theories contextualizing student loneliness in the framework of social networks.
Page 1 /461665
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.