Islamic Azad University at Shiraz
Shiraz, Iran

The Islamic Azad University of Shiraz is a private university located in Shiraz, Iran. It is a part of private chain of universities in Iran called the Islamic Azad Universities.The Islamic Azad University of Shiraz with over 290 faculty and academic staff, 82,000 square meters of educational space, 7,500 square meters of administration space, 15,200 square meters of sporting space, is the biggest private university in the southern region of Iran.The headquarters of the Islamic Azad University is in Tehran, Iran. The Islamic Azad University was founded in 1982 and currently has an enrollment of 1.7 million students, 30,000 Alumni and 35,000 Administrators making it the world's third largest. Over 3.5 million students have graduated from the Islamic Azad University since its establishment. Islamic Azad University has a total area of 16 million square meters and over 440 branches across Iran and also in other countries around the world. It has also international branches and universities in the U.A.E, United Kingdom, Tanzania, Lebanon, Afghanistan and Armenia and has plans to establish more branch campuses in Malaysia, Canada, and Tajikistan in the near future.Over the years, the university has accumulated assets estimated to be worth between $20 and $25 billion. The total Area of the University is said to be 20 million square meters.Some 4 million students have graduated from this university to this date, which has made it possible for a lot of people to get access to higher educations and better employment prospects. In the recent years a lot of effort has been made to expand the graduate studies at the Islamic Azad University. The Islamic Azad University has about 200,000 Master's Degree students and about 20,000 PhD level students.The university system also operates a news agency similar to ANA, named "Azad News Agency".Islamic Azad University's activities quickly expanded throughout the country, so that today thousands of students are enrolling every year. Not relying on government funding, it receives charitable donations and charges tuition fees.The Islamic Azad University also operates some 617 schools throughout the country, these schools are known as SAMA .The degrees and certificates issued by this university are recognized by the Ministry of Science and Higher Education. Post-graduate degrees have been offered in many different branches of Islamic Azad University. Wikipedia.

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Sulfuric acid-modified polyethylene glycol 6000 (PEG-OSO 3H) is used as an efficient Brönsted acid-surfactant combined and eco-friendly polymeric catalyst for one-pot three component Strecker type synthesis of α-aminonitriles in water as a solvent at room temperature. A broad range of substrates including the aromatic and heteroaromatic aldehydes, cyclic ketones (cyclopentanone, cyclohexanone and cycloheptanone), aryl-alkyl ketones, diaryl ketones and tetralones, isatin derivatives and acenaphthenequinone were condensed with amines (aliphatic and aromatic) and trimethylsilyl cyanide (TMSCN); all reactions are complete in short times, and the products are obtained in good to excellent yields. The catalyst could be recycled and reused several times without any loss of efficiency. © 2012 The Royal Society of Chemistry.

Shekofteh M.,Islamic Azad University at Shiraz
DSDE 2010 - International Conference on Data Storage and Data Engineering | Year: 2010

Frequent closed itemsets (FCI) is a condensed representation method for frequent item-sets. FCI reduces the redundant rules and increases the performance of mining. In recent years, a large number of algorithms have been proposed about frequent closed itemsets mining due to the importance of them In this paper, we generally review and compare the most important FCI algorithms with each other. Results show that each algorithm based on its applied strategy has some advantages and disadvantages for mining in dense and sparse datasets. However, DCI-Closed algorithm is more effective than other ones. © 2010 IEEE.

Malekzadeh P.,Persian Gulf University | Ghaedsharaf M.,Islamic Azad University at Shiraz
Composite Structures | Year: 2014

The three-dimensional (3D) free vibration of laminated cylindrical panels with finite length and functionally graded (FG) layers is presented. The cylindrical panels with two opposite axial edges simply supported and arbitrary boundary conditions at the curved edges can be analyzed via the present approach. The material properties vary continuously through the layers thickness. In order to accurately model the variation of the displacement components through the panel thickness, a layerwise-differential quadrature method (LW-DQM) is employed in this direction. Also, the in-plane variations of the displacement components are approximated using the trigonometric series in the circumferential direction and the DQM in the axial direction. The fast rate of convergence and accuracy of the method are demonstrated through different examples. As applications of the present approach, the free vibration of two common types of sandwich cylindrical panels, i.e. sandwich panels with FG face sheets and ceramic core and sandwich panels with FG core and ceramic/metal face sheets, and also bi-layered FG cylindrical panels are studied. The effects of geometrical and material parameters together with the boundary conditions on the frequency parameters of these types of panels are investigated. © 2013 Elsevier Ltd.

Irani R.,Islamic Azad University at Shiraz | Nasimi R.,Islamic Azad University at Shiraz
Expert Systems with Applications | Year: 2011

In this work we investigate how artificial neural network (ANN) evolution with genetic algorithm (GA) improves the reliability and predictability of artificial neural network. This strategy is applied to predict permeability of Mansuri Bangestan reservoir located in Ahwaz, Iran utilizing available geophysical well log data. Our methodology utilizes a hybrid genetic algorithm-neural network strategy (GA-ANN). The proposed algorithm combines the local searching ability of the gradient-based back-propagation (BP) strategy with the global searching ability of genetic algorithms. Genetic algorithms are used to decide the initial weights of the gradient decent methods so that all the initial weights can be searched intelligently. The genetic operators and parameters are carefully designed and set avoiding premature convergence and permutation problems. For an evaluation purpose, the performance and generalization capabilities of GA-ANN are compared with those of models developed with the common technique of BP. The results demonstrate that carefully designed genetic algorithm-based neural network outperforms the gradient descent-based neural network. © 2011 Published by Elsevier Ltd.

Solvent effects on the complex formation of osmium tetroxide (which is the most reliable reagent available for the cis-hydroxylation of alkenes) and pyridine were investigated using spectrophotometric techniques in different solvents (benzene, chloroform, acetone, acetonitrile, anisole, tetrahydrofuran, nitrobenzene and nitromethane). The enthalpy and entropy exhibit opposing effects on stability constant with the change in solvent. In these solvents, the entropy and enthalpy of the reaction are found to be mainly influenced by the donor number (DN) of the solvents. © 2009 Elsevier Ltd. All rights reserved.

Kazemzadeh-Parsi M.J.,Islamic Azad University at Shiraz
Iranian Journal of Science and Technology - Transactions of Mechanical Engineering | Year: 2014

In the present study, some modifications on the firefly algorithm are presented to improve its performance. The firefly algorithm is a recently developed robust metaheuristic optimization technique which mimics the social behavior of fireflies based on their flashing characteristics. To improve its performance three basic modifications are proposed in the present work. These modifications consist of adding memory, adding newborn fireflies and proposing a new updating formula. To evaluate the applicability of the proposed method, three classical engineering design optimization problems and three sizing optimization of truss structures are solved and results are compared with those available in the literature. It is observed that the proposed method can effectively be used in solution of engineering design optimization problems.

Saadat H.,Islamic Azad University at Shiraz | Pourhassan B.,Islamic Azad University at Shiraz
International Journal of Theoretical Physics | Year: 2013

In this paper we study varying generalized Chaplygin gas which has viscosity in presence of cosmological constant and space curvature. By using well-known forms of scale factor in non-linear differential equation we obtain behavior of dark energy density numerically. We use observational data to fix solution and discuss about stability of our system. © 2013 Springer Science+Business Media New York.

Saadat H.,Islamic Azad University at Shiraz | Pourhassan B.,Islamic Azad University at Shiraz
International Journal of Theoretical Physics | Year: 2014

In this paper, viscous generalized Chaplygin gas as a model of dark energy considered. We assume non-constant bulk viscous coefficient and study dark energy density. We consider several cases of density-dependent viscosities. We find that, in the special case, the viscous generalized Chaplygin gas is corresponding to modified Chaplygin gas. © 2013 Springer Science+Business Media New York.

Reza Norouzi M.,Islamic Azad University | Ahmadi A.,Islamic Azad University at Science and Research of Fars | Esmaeel Nezhad A.,Islamic Azad University at Science and Research of Fars | Ghaedi A.,Islamic Azad University at Shiraz
Renewable and Sustainable Energy Reviews | Year: 2014

This paper proposes a method for short term security-constrained unit commitment (SCUC) for hydro and thermal generation units. The SCUC problem is modeled as a multi-objective problem to concurrently minimize the ISO's cost as well as minimizing the emissions caused by thermal units. The non-linearity of valve loading effects is linearized in the presented problem. In order to model the SCUC problem more realistically, this paper considers the dynamic ramp rate of thermal units instead of the fixed rate. Moreover, multi-performance curves pertaining to hydro units are developed and the proposed SCUC problem includes the prohibited operating zones (POZs). Besides, the model of SCUC is transformed into mixed integer linear programming (MILP) instead of using mixed integer non-linear programming (MINLP) which has the capability to be solved efficiently using optimization software even for real size power systems. Pareto optimal solutions are generated by employing lexicographic optimization as well as hybrid augmented-weighted ε-constraint technique. Furthermore, a Fuzzy decision maker is utilized in this paper to determine the most preferred solution among Pareto optimal solutions derived through solving the proposed multi-objective SCUC problem. Eventually, the proposed model is implemented on modified IEEE 118-bus system comprising 54 thermal units and 8 hydro units. The simulation results reveal that the solutions obtained from the proposed technique in comparison with other methods established recently are superior in terms of total cost and emission output. © 2013 Elsevier Ltd.

Khayami R.,Islamic Azad University at Shiraz
Procedia Computer Science | Year: 2011

Constant changes in information technology (IT) and business environments have made the demand for a powerful management for IT systems more pressing. Enterprise architecture is a framework to develop and maintain IT, to achieve organizational goals and to manage resources of this technology. Enterprise Architecture (EA) quality is a multi-dimensional content which is not easily distinguishable and measurable. To determine this content more exact, the qualitative models have been presented in which different aspects of this matter are investigated. This paper attempts to introduce mentioned about determine EA qualification and its qualitative characteristics more clearly. This article can be used as a reference to investigate EA qualification and its models. Also, it can help stakeholders to explain the qualitative requirements more exactly. © 2010 Published by Elsevier Ltd.

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