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List of Articles
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Open Access Article
1 - Investigating the relationship between economic and financial factors of decision-making units and bank facilities in the form of Islamic contracts with Emphasis on Oil Price and Monetary Policy Shocks
مرتضی حقگوی حقیقی مرجان دامن کشیده منیژه هادی نژاد خشایار سیدشکری محمدرضا میرزایی نژادThe extant study was conducted to explain the mechanism of economic-financial factors affecting Islamic contracts of Iran with emphasis on oil price shocks using Structural Autoregressive Regression (SVAR) during 1986-2019. According to estimated SVAR results, an oil pr MoreThe extant study was conducted to explain the mechanism of economic-financial factors affecting Islamic contracts of Iran with emphasis on oil price shocks using Structural Autoregressive Regression (SVAR) during 1986-2019. According to estimated SVAR results, an oil price shock caused a 5% and 1% decline in production and employment rate, respectively. The results also indicated that one shock imposed by the oil price shock led to a 7% reduction in Islamic facilities in Iran, and one shock caused by liquidity led to a 9% rise in Islamic facilities and loans. In terms of the effect of oil price fluctuations on Islamic banking contracts, it could be explained that increased government budget or government expenditures, including current and construction expenditures caused by higher oil prices and incomes, along with growing banking credits and loans led to higher aggregate demand. On the other hand, the rigidity of aggregate supply resulting from technical and infrastructural constraints led to imbalance and wide supply-demand gap, and inflationary pressures. In other words, an increase in real efficiency contributes to higher production costs and inflation rates, which in turn causes liquidity withdrawal from banks and investment in other profitable markets. Furthermore, in case of increased real efficiency, only those who can spend the received loans in speculation and intermediation transactions can receive and repay the loans. Under such circumstances, banks must monitor the transaction more because such loans cannot be repaid through productive activities. The aforementioned factors cause ambiguous effects of real efficiency on investment, production, and Islamic loans. Manuscript profile -
Open Access Article
2 - Existence and Uniqueness Analysis for a Class of Singular Non-Linear Two-Point Boundary Value Problems by an Optimal Iterative Sequence
الیاس شیوانیانThe convergence of thisiterative sequence is then controlled by an embedded parameter. The fastest convergence occurs for an optimal embedded parameter which maximizes a special function. This optimization problem brings a sequence with high rate of the convergence to t MoreThe convergence of thisiterative sequence is then controlled by an embedded parameter. The fastest convergence occurs for an optimal embedded parameter which maximizes a special function. This optimization problem brings a sequence with high rate of the convergence to theunique solution in the finite region where $\frac{\partial f}{\partial y}$ has to be positive.Some illustrative examples are given to confirm the validity and reliability of this constructive theory. Manuscript profile -
Open Access Article
3 - An Experimental Analysis of the Knock Response of Different Stoichiometric Mixtures of Gasoline-Natural Gas to Various Engine Speeds
رضا بهراد ابراهیم عبدی اقدم هادی غائبیGasoline causes engine knock in higher compression ratios due to having lower spontaneous ignition temperature. Natural Gas (NG) has a higher octane number and is a proper fuel in terms of anti-knock properties; however, using it as the engine fuel results in a decline MoreGasoline causes engine knock in higher compression ratios due to having lower spontaneous ignition temperature. Natural Gas (NG) has a higher octane number and is a proper fuel in terms of anti-knock properties; however, using it as the engine fuel results in a decline in the power of the engine and increases the emission of some exhaust gases due to lower burning velocity and gaseous nature. Manuscript profile -
Open Access Article
4 - On the Solution of Volterra-Fredholm Integro-Differential Equation by Using New Iterative Method
احمد جعفریانIntegro-differential equations arise in various physical and biological problems. In this paper, a new iterative technique for solving linear Volterra-Fredholm integro-differential equation (VFIDE) has been introduced. The method is discussed in details and it is illust MoreIntegro-differential equations arise in various physical and biological problems. In this paper, a new iterative technique for solving linear Volterra-Fredholm integro-differential equation (VFIDE) has been introduced. The method is discussed in details and it is illustrated by solving some numerical examples. The approximate solution is most easily produced iteratively via the recurrence relation. Results are compared with the exact solutions, which reveal that new iteration method is very effective and convenient. Manuscript profile -
Open Access Article
5 - GSOCPP optimization for predicting the proper number of controllers in SDN
اعظم امین محسن جهانشاهی محمدرضا میبدیIn Software Defined Network (SDN), the controller layer that is separated from the data layer is responsible for all system functionalities. However, centralized solutions suffer from single-point-of-failure and bottleneck problems. Several controllers are used to incre MoreIn Software Defined Network (SDN), the controller layer that is separated from the data layer is responsible for all system functionalities. However, centralized solutions suffer from single-point-of-failure and bottleneck problems. Several controllers are used to increase availability and performance in large networks to solve the aforementioned problems. One of the main concerns is finding the optimal number of controllers and their locations, which is known as an NP-hard problem. To do this, in this paper, in addition to presenting an efficient algorithm based on Garter snake algorithm (GSO), a new statistical analysis for determining the number of controllers is figured out. Manuscript profile -
Open Access Article
6 - A Hybrid Approach for Systems of Integral Equations
حعفر بی آزار Y. Parvari Moghaddam kh. Sadri‎In this paper‎, ‎we present a computational method for solving systems of Volterra and Fredholm integral equations which is a hybrid approach‎, ‎based on the third-order Chebyshev polynomials and block-pulse functions which we will refer to as (HBV) More‎In this paper‎, ‎we present a computational method for solving systems of Volterra and Fredholm integral equations which is a hybrid approach‎, ‎based on the third-order Chebyshev polynomials and block-pulse functions which we will refer to as (HBV)‎, ‎for short‎. ‎The existence and uniqueness of the solutions are addressed‎. ‎Some examples are provided to clarify the efficiency and accuracy of the method‎. Manuscript profile -
Open Access Article
7 - A New Method for Solving Multi-Dimensional Fredholm Integral Equations and Its Convergence Analysis
نرگس محمودی دارانیIn this paper, we focus on obtaining an approximate solution for multi-dimensional Fredholm integral equations of second kind. An expansion method is used for treatment multi-dimensional Fredholm integral equation of second kind. This method reduces multi-dimensional in MoreIn this paper, we focus on obtaining an approximate solution for multi-dimensional Fredholm integral equations of second kind. An expansion method is used for treatment multi-dimensional Fredholm integral equation of second kind. This method reduces multi-dimensional integral equation to a partial differential equation. After constructing boundary conditions, this partial differential equation reduces to algebraic equation that can be solved easily with any of the usual methods. Furthermore some theorems are proved for convergence analysis. Finally, for showing the efficiency of the method we use some numerical examples Manuscript profile -
Open Access Article
8 - Observers and Relative Entropy Functional
عادل گروهی یوسف محمدی محمد ابراهیمی‎In this paper‎, ‎we will use the mathematical modeling of one-dimensional observers to present the notion of the \emph{relative entropy functional} for relative dynamical systems‎. ‎Also‎, ‎the invariance of the entropy of a system under top More‎In this paper‎, ‎we will use the mathematical modeling of one-dimensional observers to present the notion of the \emph{relative entropy functional} for relative dynamical systems‎. ‎Also‎, ‎the invariance of the entropy of a system under topological conjugacy is generalized to the relative entropy functional‎. ‎Moreover‎, ‎from observer viewpoint‎, ‎a new version of the Jacobs Theorem is obtained‎. ‎It has been proved that relative entropy functional is equivalent to the Kolmogorov entropy for dynamical systems‎, ‎from the viewpoint of observer $ \chi_X $‎, ‎where $ \chi_X $ is the characteristic function on compact metric space $X$‎. Manuscript profile -
Open Access Article
9 - Redundancy Allocation Optimization Based on the Fuzzy Universal Generating Function approach in the Series-Parallel Systems
Mohammadreza ShahriariIn This paper we discuss about the redundancy allocation problem when uncertainty exists in the problem. The innovation of this paper is the use of fuzzy universal generating function for calculating the availability of system. The system consists of component in series MoreIn This paper we discuss about the redundancy allocation problem when uncertainty exists in the problem. The innovation of this paper is the use of fuzzy universal generating function for calculating the availability of system. The system consists of component in series and for each component, elements are used in parallel. The system has the range of levels for performance from complete perfect to complete failure. Identical redundant elements are included in order to achieve a desirable reliability. The elements of each component are characterized by their cost, weight and availability. These elements are chosen from a list that available in market. To find optimum combination of elements for each component we calculate the system availability and then use proposed NSGA-III. The proposed NSGA-III heuristic determines the maximal availability system configuration base on weight constrain. Manuscript profile
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