2020-03-31T14:30:59Z
http://ijm2c.iauctb.ac.ir/?_action=export&rf=summon&issue=112359
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
COUPLED FIXED POINT THEOREMS FOR GENERALIZED Φ-MAPPINGS SATISFYING CONTRACTIVE CONDITION OF INTEGRAL TYPE ON CONE METRIC SPACES
J. O.
Olaleru
G. A.
Okeke
H.
Akewe
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.
generalized φ-pair mappings
coupled fixed point
complete cone metric spaces
2016
03
20
87
98
http://ijm2c.iauctb.ac.ir/article_521789_a55653aa292e1d619c84f9120bba5838.pdf
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
PRODUCTION INVENTORY MODEL FOR DETERIORATING ITEMS WITH SHORTAGES AND SALVAGE VALUE UNDER REVERSE LOGISTICS
V.
Kumar Mishra
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.
Inventory
deteriorating items
shortages
time dependent deterioration
salvage
2016
03
20
99
110
http://ijm2c.iauctb.ac.ir/article_521790_fabc1f3726258cb97d1a1574604e67f4.pdf
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
COMPUTATIONAL RESULTS ON FINITE P-GROUPS OF EXPONENT P2
B.
Ahmadi
H.
Doostie
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>.
Fibonacci length
$p$-groups
Nilpotency class3
2016
03
20
111
120
http://ijm2c.iauctb.ac.ir/article_521791_db64c9588025d6bf52325f4fee0eca98.pdf
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
STUDYING THE BEHAVIOR OF SOLUTIONS OF A SECOND-ORDER RATIONAL DIFFERENCE EQUATION AND A RATIONAL SYSTEM
S.
Sohrabi Hesan
Y.
Gholizade Atani
M.
Hesan
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.
Dierence equation
Rational system
Boundedness character
Nonnegative
2016
03
20
121
125
http://ijm2c.iauctb.ac.ir/article_521792_db5486a0859997153cc3246cea521860.pdf
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
NUMERICAL SOLUTION OF INTEGRO-DIFFERENTIAL EQUATION BY USING CHEBYSHEV WAVELET OPERATIONAL MATRIX OF INTEGRATION
M. A.
Fariborzi Araghi
S.
Daliri
M.
Bahmanpour
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.
Integro-differential equation
Chebyshev wavelet of the first kind
Operational matrix of integration
Legendre wavelet
CAS wavelet
2016
03
20
127
136
http://ijm2c.iauctb.ac.ir/article_521793_7799387e0d249474234088de14827401.pdf
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
APPLICATIONS OF PARTIAL DIFFERENTIAL EQUATIONS IN STABILITY INDEX AND CRITICAL LENGTH IN AVALANCHE DYNAMICS
S.
Ahmadi
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.
stability index
Shear strength
avalanche dynamics
2016
03
20
137
144
http://ijm2c.iauctb.ac.ir/article_521794_361e0fbe08ae81a1a4f9337c3d4d27ee.pdf
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
AN OPTIMIZATION METHOD TO DETERMINE THE LEAST COMMON MULTIPLY
M.
Zangane
G.
Tohidi
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.
2016
03
20
145
149
http://ijm2c.iauctb.ac.ir/article_521795_0dbd28e04fc9c1ed251a101b1f8f18b3.pdf
International Journal of Mathematical Modelling & Computations
2228-6225
2228-6225
2012
2
2 (SPRING)
COST AND ALLOCATIVE EFFICIENCY IN BUYER-SUPPLIER
S.
Mamizadeh-Chatghayeh
<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>
Buyer-supplier
Data envelopment analysis
Cost and Allocative eciency
2016
03
20
151
158