2018-06-23T21:22:43Z
http://msj.iau-arak.ac.ir/?_action=export&rf=summon&issue=110875
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
The behavior of homological dimensions
M.
Ansari
E.
Hosseini
Let R be a commutative noetherian ring. We study the behavior of injectiveand at dimension of R-modules under the functors HomR(-,-) and -×R-.
2010
01
01
1
10
http://msj.iau-arak.ac.ir/article_515313_09bca7e37624a1c0d64013f3852efa07.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
Some Results for CAT(0) Spaces
M.
Asadi
S.M.
Vaezpour
M.
Soleymani
We shall generalize the concept of z = (1-t)+ty to n times which containsto verify some their properties and inequalities in CAT(0) spaces. In the sequelwith introducing of -nonexpansive mappings, we obtain some xed points andapproximate fixed points theorems.
2010
01
01
11
19
http://msj.iau-arak.ac.ir/article_515378_78a4a9250206fef8e3dc4b1472040caf.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
Modeling, simulation and analysis of a multi degree of freedom aircraft wing model
Xueguang
Bia
Yucheng
Liu
This paper presented methods to determine the aerodynamic forces that acton an aircraft wing during flight. These methods are initially proposed for asimplified two degree-of-freedoms airfoil model and then are extensivelyapplied for a multi-degree-of-freedom airfoil system. Different airspeedconditions are considered in establishing such methods. The accuracy of thepresented methods is verified by comparing the estimated aerodynamic forceswith the actual values. A good agreement is achieved through the comparisonsand it is verified that the present methods can be used to correctly identify theaerodynamic forces acting on the aircraft wing models.
2010
01
01
21
62
http://msj.iau-arak.ac.ir/article_515379_93d3ea2be772e393cc90a82936584ca0.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
Random fixed point of Meir-Keeler contraction mappings and its application
H.
Dibachi
In this paper we introduce a generalization of Meir-Keeler contraction forrandom mapping T : Ω×C → C, where C be a nonempty subset of a Banachspace X and (Ω,Σ) be a measurable space with being a sigma-algebra of sub-sets of. Also, we apply such type of random fixed point results to prove theexistence and unicity of a solution for an special random integral equation.
2010
01
01
63
67
http://msj.iau-arak.ac.ir/article_515380_36e8d67d573cff6a5a2ff90081531049.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
Numerical solution of seven-order Sawada-Kotara equations by homotopy perturbation method
M.
Ghasemi
A.
Azizi
M.
Fardi
In this paper, an application of homotopy perturbation method is appliedto nding the solutions of the seven-order Sawada-Kotera (sSK) and a Lax'sseven-order KdV (LsKdV) equations. Then obtain the exact solitary-wave so-lutions and numerical solutions of the sSK and LsKdV equations for the initialconditions. The numerical solutions are compared with the known analyticalsolutions. Their remarkable accuracy are nally demonstrated for the bothseven-order equations.
2010
01
01
69
77
http://msj.iau-arak.ac.ir/article_515381_e0eb49c1bea417d5dc7fe7bd3bf3bbdf.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
A comment on “Supply chain DEA: production possibility set and performance evaluation model
G.R.
Jahanshahloo
M.
Rostamy-Malkhalifeh
S.
Izadi-Boroumand
In a recent paper in this journal, Yang et al. [Feng Yang, Dexiang Wu,Liang Liang, Gongbing Bi & Desheng Dash Wu (2009), supply chainDEA:production possibility set and performance evaluation model] definedtwo types of supply chain production possibility set which were proved to beequivalent to each other. They also proposed a new model for evaluatingsupply chains. There are, however, some shortcomings in their paper. In thecurrent paper, we correct the model, the theorems, and their proofs.
2010
01
01
79
87
http://msj.iau-arak.ac.ir/article_515382_cf792bd513a02cc31cb51cdc7fb20736.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
Approximating xed points of generalized non-expansive non-self mappings in CAT(0) spaces
Saeed
Saeed Shabani
S. J.
Hoseini Ghoncheh
Suppose K is a nonempty closed convex subset of a complete CAT(0) spaceX with the nearest point projection P from X onto K. Let T : K → X be anonself mapping, satisfying condition (C) with F(T) :={ x ε K : Tx = x}≠Φ.Suppose fxng is generated iteratively by x1ε K, xn+1 = P((1-αn)xn+αnTP[(1-αn)xn+βnTxn]),n≥1, where {αn }and {βn } are real sequences in[ε,1-ε] for some ε in (0,1). Then {xn} is Δ-convergence to some point x* inF(T). This work extends a result of Laowang and Panyanak [5] to the case ofgeneralized nonexpansive nonself mappings.
2010
01
01
89
95
http://msj.iau-arak.ac.ir/article_515383_ba0bd270f6b414df6b34d0d79201f95e.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
Numerical solution of nonlinear integral equations by Galerkin methods with hybrid Legendre and Block-Pulse functions
M.
Tavassoli Kajani
S.
Mahdavi
In this paper, we use a combination of Legendre and Block-Pulse functionson the interval [0; 1] to solve the nonlinear integral equation of the second kind.The nonlinear part of the integral equation is approximated by Hybrid Legen-dre Block-Pulse functions, and the nonlinear integral equation is reduced to asystem of nonlinear equations. We give some numerical examples. To showapplicability of the proposed method.
2010
01
01
97
105
http://msj.iau-arak.ac.ir/article_515384_a73b5676a00517a20d70e0cdfca872ad.pdf
Theory of Approximation and Applications
Theory Approx. Appl.
2538-2217
2538-2217
2010
7
1
Artinianess of Graded Generalized Local Cohomology Modules
Sh.
Tahamtan
Let R = L n2N0Rn be a Noetherian homogeneous graded ring with local basering (R0;m0) of dimension d . Let R+ = Ln2NRn denote the irrelevant idealof R and let M and N be two nitely generated graded R-modules. Lett = tR+(M;N) be the rst integer i such that HiR+(M;N) is not minimax.We prove that if i t, then the set AssR0 (HiR+(M;N)n) is asymptoticallystable for n ! 1 and Hjm0 (HiR+(M;N)) is Artinian for 0 j 1. More-over, let s = sR+(M;N) be the largest integer i such that HiR+(M;N) is notminimax. For each i s, we prove that R0m0R0HiR+(M;N) is Artinian andthat Hjm0 (HiR+(M;N)) is Artinian for d 1 j d. Finally we show thatHd2m0 (HsR+(M;N)) is Artinian if and only if Hdm0 (Hs1R+(M;N)) is Artinian.
2010
01
01
107
117
http://msj.iau-arak.ac.ir/article_515385_ae134bbadf38a780a588e93ce57b0213.pdf