Journal of New Researches in MathematicsJournal of New Researches in Mathematics
http://jnrm.srbiau.ac.ir/
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http://jnrm.srbiau.ac.ir/
Feed provided by Journal of New Researches in Mathematics. Click to visit.Bankruptcy Assessment with the Interval programming and Games Theory
http://jnrm.srbiau.ac.ir/article_11439_0.html
برخی از پارامترهای موجود در مسائل عالم واقعیت دارای عدم قطعیت میباشند. یکی از مسائل نادقیق که پارامترهای آن دارای حالت کیفی میباشند، مسائل اقتصادی مانند مسئلهی ورشکستگی است. در اینصورت ممکن است با دیدگاه مسئولین، مدیران شرکتها و سازمانها، با مفاهیم نادقیق از جمله بازهها برخورد کنیم. بر این اساس، در این مقاله با استفاده از مفاهیم نظریهی بازیهای تحلیل پوششی داده ها(DEA) که مفهوم کاربردی آن در تمامی جهتها عینیت دارد و تلفیق آن با مدل های نادقیق از نوع بازه ای، مسئله ی ورشکستگی را ارزیابی و یک نوع بازی بازه ای را برای پیش بینی ورشکستگی تعیین می کنیم و در آخر بازه ی خو ش بینانه و بدبینانه ای را برای ارزیابی ورشکستگی معرفی می کنیم که به ما در ارزیابی های دقیق اقتصادی با مفاهیم نادقیق کمک شایانی می کند و در مسائلی که عدم قطعیت حضور دارد به راحتی می توان با تبدیل آنها به حالت های بازه ای مسائل را ساده تر تحلیل و بررسی کرد.Tue, 02 Jan 2018 20:30:00 +0100Utility of Ranking Warehouse Candidates in Workshop Locations Using UTAStar
http://jnrm.srbiau.ac.ir/article_11504_1831.html
Although the importance of locating in manufacturing and service companies is not a new issue, one of significance applications is to determine the appropriate location for warehouses in manufacturing workshops warehouses to the maintenance of materials or products. In any organizations, Finding the suitable site for warehouses establishments to increase customer service and efficiency is one of the most important and costly issues. The warehouse location is the main decision and structurally multi-criteria that includes quantitative and qualitative objectives. In this study, we apply an MADM technique to achieve the primary ranking for the proposed and potential warehouse locations of the company, and then put them as the input of the UTAStar, which is a new and more practical to inference utility functions from past decision data. We will investigate the utility of the results and define the desirability of ranked options for evaluating and selecting of warehouse space. Sun, 31 Dec 2017 20:30:00 +0100On Generalized Injective Spaces in Generalized Topologies
http://jnrm.srbiau.ac.ir/article_11505_1831.html
In this paper, we first present a new type of the concept of open sets by expressing some properties of arbitrary mappings on a power set. With the generalization of the closure spaces in categorical topology, we introduce the generalized topological spaces and the concept of generalized continuity and become familiar with weak and strong structures for generalized topological spaces. Then, introducing the concept of the generalized embedding and the generalized injection, we study Császár product of generalized spaces in the category of generalized topological spaces. Using by the tools of category theory, we describe the results of classifying on the generalized injective spaces in which these spaces are characterized as generalized embedding of Császár product with the product topology of two points Sierpinski space. Finally, the generalized dual-injection spaces as the objects of a special subcategory of the generalized topological spaces are studied for which all single-point subsets are closed.Sun, 31 Dec 2017 20:30:00 +0100The Existance of the Optimum Solution for the System of Differential Equation in Hilbert Space
http://jnrm.srbiau.ac.ir/article_11506_1831.html
In this paper, we study the existence of the following optimum solution for the system of differential equation ...Sun, 31 Dec 2017 20:30:00 +0100Bankruptcy Assessment with the Interval Programming and Games Theory
http://jnrm.srbiau.ac.ir/article_11471_1831.html
Some of the parameters in issues of the reality world are uncertainty. One of the uncertain problems with the qualitative parameters is economic problems such as bankruptcy problem. In this case, there is a probability of dealing with imprecise concepts including the intervals regarding the official’s viewpoint, organizations’ managers. Accordingly, this article uses the concepts of data envelopment analysis (DEA) game theory’ applications that it is appeared in all areas of studies, and combining it with uncertainty models like intervals, assess bankruptcy and specify the pessimistic and optimistic interval for bankruptcy assessment that hep us to assess uncertain concepts in economics and in the problems that we have certain, converting to interval programming a, is studied problems simply.Sun, 31 Dec 2017 20:30:00 +0100A Numerical Approach for Solving of Two-Dimensional Linear Fredholm Integral Equations with ...
http://jnrm.srbiau.ac.ir/article_11507_1831.html
In this paper, a new collocation method, which is based on Boubaker polynomials, is introduced for the approximate solutions of a class of two-dimensional linear Fredholm integral equationsof the second kind. The properties of two-dimensional Boubaker functions are presented. The fundamental matrices of integration with the collocation points are utilized to reduce the solution of the integral equation to the solution of a system of algebraic equations. The precision and error analysis have been carefully and structurally studied and it has been emphasized that the proposed method for a variety of linear two-dimensional linear Fredholm linear integral equations with continuous kernel of polynomial type is completely accurate and error-free. On the other hand, with the help of the Maple Math Software, it is very easy to calculate the Boubaker polynomial coefficients of the solution. Also, we compared the results of present method with the results of other available methods to provide the validity, accuracy and efficiency of the technique.Sun, 31 Dec 2017 20:30:00 +0100An optimal analytical method for nonlinear boundary value problems based on method of variation ...
http://jnrm.srbiau.ac.ir/article_11536_1831.html
In this paper, the authors present a modified convergent analytic algorithm for the solution of nonlinear boundary value problems by means of a variable parameter method and briefly, the method is called optimal variable parameter method. This method, based on the embedding of a parameter and an auxiliary operator, provides a computational advantage for the convergence of the approximate solutions of nonlinear differential equations. The developed convergence has been shown and its details are discussed. Additionally, a convenient method is considered for selecting an optimal value of the auxiliary parameter, via minimizing the residual error over the domain of problem. The effectiveness of the method and the accuracy of the proposed algorithm are illustrated by the implementation of physical problems such as Sturm-Liouville problem, Airy equation, and Quantum mechanical harmonic oscillator problem. The numerical results and obtained demonstrate clearly reflect the accuracy of the method and its convergence.Sun, 31 Dec 2017 20:30:00 +0100