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Search Results: 1 - 10 of 237 matches for " Abdollah Borhanifar "
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General Solution of Generalized (2+1)–Dimensional Kadomtsev-Petviashvili (KP) Equation by Using the –Expansion Method  [PDF]
Abdollah Borhanifar, Reza Abazari
American Journal of Computational Mathematics (AJCM) , 2011, DOI: 10.4236/ajcm.2011.14025
Abstract: In this work, the (G,/G)- --expansion method is proposed for constructing more general exact solutions of the (2 + 1)--dimensional Kadomtsev-Petviashvili (KP) equation and its generalized forms. Our work is motivated by the fact that the (G,/G)---expansion method provides not only more general forms of solutions but also periodic and solitary waves. If we set the parameters in the obtained wider set of solutions as special values, then some previously known solutions can be recovered. The method appears to be easier and faster by means of a symbolic computation system.
General Solution of Two Generalized Form of Burgers Equation by Using the (G'/G)-Expansion Method  [PDF]
Abdollah Borhanifar, Reza Abazari
Applied Mathematics (AM) , 2012, DOI: 10.4236/am.2012.32025
Abstract: In this work, the (G'/G)-expansion method is proposed for constructing more general exact solutions of two general form of Burgers type equation arising in fluid mechanics namely, Burgers-Korteweg-de Vries (Burgers-KdV) and Burger-Fisher equations. Our work is motivated by the fact that the (G'/G)-expansion method provides not only more general forms of solutions but also periodic and solitary waves. If we set the parameters in the obtained wider set of solutions as special values, then some previously known solutions can be recovered. The method appears to be easier and faster by means of a symbolic computation system.
Numerical Solution for Fractional Partial Differential Equations Using Crank-Nicolson Method with Shifted Grünwald Estimate
Walailak Journal of Science and Technology , 2012, DOI: 10.2004/vol10iss1ppaccepted
Abstract: In this paper, the novel hybrid finite difference type Crank-Nicolson scheme with the aid of shifted Grünwald estimate is proposed to solve fractional partial differential equations. Consistency of the proposed method is confirmed using fractional Taylor’s expansion. Error analysis and properties of the scheme are proved. It is proved that the truncation error for this scheme is of the order of the fractional. Stability and convergence of the proposed method is proved. The exact solution is obtained via two-steps Adomian decomposition method. Companions are made between this proposed scheme and the closed analytical form solution. Numerical results are given.
The Study of Factors Affecting the Creation of Cognition Based on Power-Knowledge Point of View  [PDF]
Abdollah Rasekhi
Open Journal of Philosophy (OJPP) , 2016, DOI: 10.4236/ojpp.2016.61004
Abstract: Various factors are influencing the creation of cognition so that “Mannheim” refers to economic interests and the insight of groups and social classes, “Weber” to the economic system and the in- terests, and also “Foucault” in his theory of power-knowledge refers to the power. Among the above factors, the power can have the greatest influence on the creation of cognition. So for “Foucault”, the power can lead to the development of knowledge through structures, institutions and discourses. On the other hand, the knowledge as a complement to the power can maintain and expand this latter. But it should be noted that the Knowledge itself can also cause cognition in people by giving them awareness and understanding about things. It seems therefore that cognition is also affected by Power. In this article, we will try to assess a cognition created by the correlations of Power and in the meantime try to learn about other factors that influence the creation of cognition. Hence, this article can help considerably to revise the foundations of Epistemology, as well as to present the specifications of the probable future ideas all in reviewing and reconstructing the sociology routes and appropriate use of present and past experiences and cognitive capacities.
An Unconditionally Stable Parallel Difference Scheme for Telegraph Equation
A. Borhanifar,Reza Abazari
Mathematical Problems in Engineering , 2009, DOI: 10.1155/2009/969610
Abstract: We use an unconditionally stable parallel difference scheme to solve telegraph equation. This method is based on domain decomposition concept and using asymmetric Saul'yev schemes for internal nodes of each sub-domain and alternating group implicit method for sub-domain's interfacial nodes. This new method has several advantages such as: good parallelism, unconditional stability and better accuracy than original Saul'yev schemes. The details of implementation and proving stability are briefly discussed. Numerical experiments on stability and accuracy are also presented.
The Effect of Price Discount on Time-Cost Trade-off Problem Using Genetic Algorithm  [PDF]
Hadi Mokhtari, Abdollah Aghaie
Engineering (ENG) , 2009, DOI: 10.4236/eng.2009.11005
Abstract: Time-cost trade off problem (TCTP), known in the literature as project crashing problem (PCP) and project speeding up problem (PSP) is a part of project management in planning phase. In this problem, determining the optimal levels of activity durations and activity costs which satisfy the project goal(s), leads to a balance between the project completion time and the project total cost. A large amount of literature has studied this problem under various behavior of cost function. But, in all of them, influence of discount has not been in-vestigated. Hence, in this paper, TCTP would be studied considering the influence of discount on the re-source price, using genetic algorithm (GA). The performance of proposed idea has been tested on a medium scale test problem and several computational experiments have been conducted to investigate the appropriate levels of proposed GA considering accuracy and computational time.
Study on Power Centers in Iran: Continuum of Political, Social and Economic Power as a Framework for Discipline Analysis  [PDF]
Abdollah Rasekhi, Javid Mohammadi
Open Journal of Political Science (OJPS) , 2016, DOI: 10.4236/ojps.2016.62010
Abstract: This article studies power organizations and their role in political, social and economic discipline in Iran. Religion, tradition and organizations are the sources of political and social power in Iran. Water, land, oil and mining are economic power resources. The economy is governmental, and power is personal and organizational. The supreme leader and the legislature of view of the decisions and the executive of view of the administration have the top position in power trend. Islamic republic system is relying on supreme leader, so that the authority’s adjusting actions are in accordance with his perspectives. In this article, the information is analyzed using the systems theory. In this theory, the interrelationship of power centers and their role in policymaking process, the effects of domestic and international environments on decision making, and importance of organizations function in support of the system are studied.
Radioactive Anomalies in 1:50000 Dehbakri Sheet, South of Kerman Province, Iran  [PDF]
Hamid Reza Jafari, Abdollah Yazdi
Open Journal of Geology (OJG) , 2014, DOI: 10.4236/ojg.2014.48031

Using airborne radiometric geophysical data, one can easily investigate a wide region in a short time and with little cost to finally find areas that are rich in radioactive elements. In this research, the uranium exploration data were first organized, filtered and classified and then the frequency distribution tables and histograms were drawn. After drawing the histograms, the statistical parameters for radioactive elements were calculated. The separation of anomaly populations was done on the basis of distribution around mean value, that is, the resulting mean, mean + 1SD, mean + 2SD, and mean + 3SD were assumed to equal to background, threshold value, the possible anomaly and the probable anomaly, respectively. In the end, representative maps of anomalies and separation of anomaly populations from the background were presented based on classical statistical calculations.

Estimation and Comparison of Solar Radiation Intensity by Some Models in a Region of Iran  [PDF]
Abdollah Khalesi Doost, Mozhgan Akhlaghi
Journal of Power and Energy Engineering (JPEE) , 2014, DOI: 10.4236/jpee.2014.24046
Abstract: Due to the increasing explanation of new energy application on a world scale and because of the reduction of environmental pollution arise from usage of solar energy in high potential regions, the necessity of solar radiation measurement in different regions of Iran is obvious. Therefore, in this study, the amount of radiation is measured by Pyranometer from beginning of February to August 2010 in Semnan (The central part of Iran), and it is compared with daily sunny hours, different estimated models of daily radiation such as Angstrom-Pryskat (Montis, Climate classification based on the Terwartha scientific map, using the results of 40 worldwide station, using the results of 9 Synoptic stations in Iran), the Maximum likelihood (using the results of 100 stations in worldwide, using the results of 9 Synoptic station in Iran). Finally, Terwartha scientific map model is proposed because of matching more with measured data on location.
Heat Transfer Analysis in Cooling System of Hydropower’s Generator  [PDF]
Abdollah Khalesi Doost, Reza Majlessi
Open Journal of Applied Sciences (OJAppS) , 2015, DOI: 10.4236/ojapps.2015.53010
Abstract: Cooling process of power plant generator is handled via air-cooled radiators in which the cooling water is supplied from lake with its water temperature varies from season to season. In this study, the effect of temperature fluctuations of cooling water entering the cooling system has been examined via analysis of energy (NTU method) and exergy. The exergy analysis has been done by definition of efficiency coefficient for exergy of cooling media (water) and heating media (air). Besides, the effect of changing the cooling water temperature and flow rate entering the radiators on the cooling system performance has been studied. The results revealed the generator cooling system performance level held sufficient till the temperature of inlet water was kept under 293 k (20°C). On one hand, when the temperature of cooling water at the inlet rises to 12°C, the rate of heat exchange at radiators falls up to 34.3%. On the other hand, by water temperature passing the 12°C limit, the efficiency of cooling media exergy falls to 78% leading to efficiency rise in radiators’ heating media exergy level to 61%. According to the results of this study, changing flow rate of cooling media up to 40% gives rise to the efficiency coefficient of radiators’ cooling media exergy level to about 18.7%. While it does not affect the efficiency level of energy at radiators, the flow rate rise of cooling media may not be considered as a way to give rise to efficiency level of radiators.
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