eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
87
98
521789
COUPLED FIXED POINT THEOREMS FOR GENERALIZED Φ-MAPPINGS SATISFYING CONTRACTIVE CONDITION OF INTEGRAL TYPE ON CONE METRIC SPACES
J. O. Olaleru
1
G. A. Okeke
2
H. Akewe
3
University of Lagos, Lagos, Nigeria. Nigeria Mathematics Department
University of Lagos, Lagos, Nigeria. Nigeria Mathematics Department
University of Lagos, Lagos, Nigeria. Nigeria Mathematics Department
In this paper, we unify, extend and generalize some results on coupled fixed point theorems of generalized φ- mappings with some applications to fixed points of integral type mappings in cone metric spaces.
http://ijm2c.iauctb.ac.ir/article_521789_a55653aa292e1d619c84f9120bba5838.pdf
generalized φ-pair mappings
coupled fixed point
complete cone metric spaces
eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
99
110
521790
PRODUCTION INVENTORY MODEL FOR DETERIORATING ITEMS WITH SHORTAGES AND SALVAGE VALUE UNDER REVERSE LOGISTICS
V. Kumar Mishra
1
B T kumaon Institute of Technology,Dwarahat, Almora,Uttarakhand, India India Computer Science, Assistant Professor
In this paper, a production inventory model is developed for the business enterprise which consists of three wings. The first wing is for manufacturing new items, the second wing is for collecting the returned items, while third wing is for remanufacturing the returned item. In this model we consider the fact that the storage item is deteriorated during storage periods and salvage value is incorporated to the deteriorated items. The demand, deterioration, production, remanufacturing and return rates are time dependent. The shortages are allowed and fully backlogged. The model is solved analytically by minimizing the total inventory cost. The model can be applied for optimizing the total inventory cost of deteriorating items inventory under reverse logistic for a business enterprise where demand and deterioration both is function of time.
http://ijm2c.iauctb.ac.ir/article_521790_fabc1f3726258cb97d1a1574604e67f4.pdf
Inventory
deteriorating items
shortages
time dependent deterioration
salvage
eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
111
120
521791
COMPUTATIONAL RESULTS ON FINITE P-GROUPS OF EXPONENT P2
B. Ahmadi
1
H. Doostie
2
Mathematics Department, Science and Research Branch, Islamic Azad University, Tehran, Iran. Iran, Islamic Republic of Professor of Mathematics,
Lecturer, Lahijan Islamic Azad University, Lahijan, Iran Iran, Islamic Republic of Lecturere, Ph.D. Student (at present).
The Fibonacci lengths of the finite <em>p</em>-groups have been studied by R. Dikici and co-authors since 1992. All of the considered groups are of exponent <em>p</em>, and the lengths depend on the celebrated Wall number <em>k(p)</em>. The study of <em>p</em>-groups of nilpotency class 3 and exponent <em>p</em> has been done in 2004 by R. Dikici as well. In this paper we study all of the <em>p</em>-groups of nilpotency class 3 and exponent <em>p<sup>2</sup></em>. This completes the study of Fibonacci length of all $p$-groups of order <em>p<sup>4</sup></em>, proving that the Fibonacci length is <em>k(p<sup>2</sup>)</em>.
http://ijm2c.iauctb.ac.ir/article_521791_db64c9588025d6bf52325f4fee0eca98.pdf
Fibonacci length
$p$-groups
Nilpotency class3
eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
121
125
521792
STUDYING THE BEHAVIOR OF SOLUTIONS OF A SECOND-ORDER RATIONAL DIFFERENCE EQUATION AND A RATIONAL SYSTEM
S. Sohrabi Hesan
1
Y. Gholizade Atani
2
M. Hesan
3
University Of Tabriz,Tabriz Iran, Islamic Republic of Faculty of Mathematical Science
In this paper we investigate the behavior of solutions, stable and unstable of the solutions a second-order rational difference equation. Also we will discuss about the behavior of solutions a the rational system, we show these solutions may be stable or unstable.
http://ijm2c.iauctb.ac.ir/article_521792_db5486a0859997153cc3246cea521860.pdf
Dierence equation
Rational system
Boundedness character
Nonnegative
eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
127
136
521793
NUMERICAL SOLUTION OF INTEGRO-DIFFERENTIAL EQUATION BY USING CHEBYSHEV WAVELET OPERATIONAL MATRIX OF INTEGRATION
M. A. Fariborzi Araghi
1
S. Daliri
2
M. Bahmanpour
3
Islamic Azad University, Central Tehran Branch, Iran Iran, Islamic Republic of Department of Mathematics
Iran, Islamic Republic of
Department of Mathematics, Sama Technical and Vocational Training College, Islamic, Azad University, Khorasgan, Isfahan Branch, Iran. Iran, Islamic Republic of
In this paper, we propose a method to approximate the solution of a linear Fredholm integro-differential equation by using the Chebyshev wavelet of the first kind as basis. For this purpose, we introduce the first Chebyshev operational matrix of integration. Chebyshev wavelet approximating method is then utilized to reduce the integro-differential equation to a system of algebraic equations. Illustrative examples are included to demonstrate the advantages and applicability of the technique.
http://ijm2c.iauctb.ac.ir/article_521793_7799387e0d249474234088de14827401.pdf
Integro-differential equation
Chebyshev wavelet of the first kind
Operational matrix of integration
Legendre wavelet
CAS wavelet
eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
137
144
521794
APPLICATIONS OF PARTIAL DIFFERENTIAL EQUATIONS IN STABILITY INDEX AND CRITICAL LENGTH IN AVALANCHE DYNAMICS
S. Ahmadi
1
Tehran north branch-Azad University-iran Iran, Islamic Republic of I'm an Assistant Professor of Applied Mathematics at the University of Azad university. I received my doctorate in Fluid mechanics fro pune University. My recent publication include "Tornado Dynamics" in the journal of karaj Azad university.
In this study, Stability analysis of snow slab which is under detonation has developed in the present model. The model has been studied by using the basic concepts of non-detonation model and concepts of underwater explosions with appropriate modifications to the present studies. The studies have also been extended to account the effect of critical length variations at the time of detonation and its effects on various material parameters through the concepts of fracture mechanics. The results indicate that the stability and critical length values are lower for the detonation (present) values in comparison with the non-detonated values. The importance of the studies in Avalanche forecasting has been highlighted.
http://ijm2c.iauctb.ac.ir/article_521794_361e0fbe08ae81a1a4f9337c3d4d27ee.pdf
stability index
Shear strength
avalanche dynamics
eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
145
149
521795
AN OPTIMIZATION METHOD TO DETERMINE THE LEAST COMMON MULTIPLY
M. Zangane
1
G. Tohidi
2
Iran, Islamic Republic of
Iran, Islamic Republic of
This paper proposes an Integer Programming model to obtain the Least Common Multiply (LCM) for some integer numbers. The proposed method is illustrated by a numerical example.
http://ijm2c.iauctb.ac.ir/article_521795_0dbd28e04fc9c1ed251a101b1f8f18b3.pdf
eng
Islamic Azad University, Central tehran Branch
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6233
2016-03-20
2
2 (SPRING)
151
158
521796
COST AND ALLOCATIVE EFFICIENCY IN BUYER-SUPPLIER
S. Mamizadeh-Chatghayeh
1
Young researches club, Islamic Azad University, Central Tehran branch Iran, Islamic Republic of
<span>The aim of this paper is the evaluation overall performance of buyer-supplier relationships.</span><br /><span>In some situations the cost of inputs in a buyer-supplier chain are available, on the other hand, achieving a low cost position is necessary for most businesses. And, in a buyer-supplier chain wants to know how assign inputs with the least cost. This paper introduces cost efficiency with same and dierent costs of inputs. Moreover, cost efficiency not only does it improve protability, but businesses with a low cost position are better able to drive growth through higher investment in sales, marketing, improve customer service and new product development, as well as more competitive pricing in buyer-supplier. Moreover, in this paper we introduce allocative and technical eciency of buyer-supplier that based on the Data envel-opment analysis (DEA). And show how far the buyer-supplier is from the point of maximum protability given the existing market prices for inputs and products, and also is achieved when the value consumers place on a good or service equals the cost of the resources used up in production. Finally, we illustrate the proposed models by an example.</span>
http://ijm2c.iauctb.ac.ir/article_521796_d41d8cd98f00b204e9800998ecf8427e.pdf
Buyer-supplier
Data envelopment analysis
Cost and Allocative eciency