Islamic Azad University is a private chain of universities in Iran.Headquartered in Tehran, Iran, the Islamic Azad University was founded in 1982 and has an enrollment of 1.3 million students.The university operates a news agency similar to ANA, named "Azad News Agency".Not relying on government funding, it charges students tuition fees. The certificates issued by this university should be recognized upon evaluation by the Ministry of Science and Higher Education. Masters and doctorate programs are offered by the university. Wikipedia.
Tabatabaei S.,Islamic Azad University at Mahshahr
Journal of Intelligent and Fuzzy Systems | Year: 2014
This paper suggests a new stochastic framework based on 2 m+1 point estimate method (PEM) to solve the mid-term generation scheduling (SMGS) problem. The new formulation makes use of an adaptive modified bat algorithm and a novel self-adaptive wavelet mutation strategy for the establishment of new robust algorithm for the present problem. In addition, this work improves the modeling process of wind-thermal system in the MGS problem by considering the possible uncertainties when scheduling the generators of power system of the problem. The proposed model can concurrently capture the uncertainty effect of load and wind speed variations. The feasibility and efficiency of the proposed method is examined using two test systems. © 2014 - IOS Press and the authors. All rights reserved.
Amirhashchi H.,Islamic Azad University at Mahshahr
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics | Year: 2011
Locally rotationally symmetric (L.R.S.) Bianchi type II stiff fluid cosmological model is investigated. To get the deterministic model of the universe, we have assumed a supplementary condition A=Bm between metric potentials A and B, where m is a constant. It is shown that the vacuum energy density Λ is positive and proportional to 1t2. The values of deceleration parameter q, matter-energy density Ωm and dark-energy density ΩΛare found to be in good agreement with the values obtain from 5-years WMAP observations. The predicted value of the jerk parameter is in agreement with the SNLS SNIa and X-ray galaxy cluster distance data but it is not match with the SNIa gold sample data. In general, the model represent accelerating, shearing and non-rotating universe. The physical and geometrical behavior of this model is also discussed. © 2011 Elsevier B.V.
Peyghan A.A.,Islamic Azad University at Tehran |
Noei M.,Islamic Azad University at Mahshahr
Computational Materials Science | Year: 2014
We investigated the electronic sensitivity of a BC2N nanotube to a HF molecule by density functional calculations at B3LYP (augmented with an empirical dispersion term) level of theory. It was found that the HF molecule prefers to be weakly adsorbed on the tube with the adsorption energy of 23.1 kcal/mol and without significant effect on its electronic properties. Al and Si dopings into the wall of the tube increase the reactivity of the tube toward the HF molecule, so that calculated adsorption energies are about 92.8 and 73.0 kcal/mol, respectively. Contrary to the Al doping, the Si doping significantly enhances the electronic sensitivity of the tube to the HF molecule. We believe that Si-doped BC2N nanotube can convert the presence of HF molecules to an electrical signal which will be useful in the detection process. © 2013 Elsevier B.V. All rights reserved.
Malekpour A.R.,Islamic Azad University |
Tabatabaei S.,Islamic Azad University at Mahshahr |
Niknam T.,Islamic Azad University at Marvdasht
Renewable Energy | Year: 2012
Deregulation and restructuring in power systems, the ever-increasing demand for electricity, and concerns about the environment are the major driving forces for using Renewable Energy Sources (RES). Recently, Wind Farms (WFs) and Fuel Cell Power Plants (FCPPs) have gained great interest by Distribution Companies (DisCos) as the most common RES. In fact, the connection of enormous RES to existing distribution networks has changed the operation of distribution systems. It also affects the Volt/Var control problem, which is one of the most important schemes in distribution networks. Due to the intermittent characteristics of WFs, distribution systems should be analyzed using probabilistic approaches rather than deterministic ones. Therefore, this paper presents a new algorithm for the multi-objective probabilistic Volt/Var control problem in distribution systems including RES. In this regard, a probabilistic load flow based on Point Estimate Method (PEM) is used to consider the effect of uncertainty in electrical power production of WFs as well as load demands. The objective functions, which are investigated here, are the total cost of power generated by WFs, FCPPs and the grid; the total electrical energy losses and the total emission produced by WFs, FCPPs and DisCos. Moreover, a new optimization algorithm based on Improved Shuffled Frog Leaping Algorithm (ISFLA) is proposed to determine the best operating point for the active and reactive power generated by WFs and FCPPs, reactive power values of capacitors, and transformers' tap positions for the next day. Using the fuzzy optimization method and max-min operator, DisCos can find solutions for different objective functions, which are optimal from economical, operational and environmental perspectives. Finally, a practical 85-bus distribution test system is used to investigate the feasibility and effectiveness of the proposed method. © 2011 Elsevier Ltd.
Alipour R.,Islamic Azad University at Mahshahr
International Review of Mechanical Engineering | Year: 2011
Because of high ductility, aluminum alloys, have been widely used as an important base of metal forming industries. But the main week point of these alloys is their low strength so in forming them with conventional methods like deep drawing, hydro forming, etc have been always faced with problems like fracture during of forming process. Because of this, recently using of explosive forming method for forming of these plates has been recommended. In this paper free explosive forming of A2024 aluminum alloy is numerically simulated and during it, explosion wave propagation process is studied. Consequences of this simulation can be effective in prediction of quality of production. These consequences are compared with an experimental test and show the superiority of this method to similar methods like hydro forming and deep drawing. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.