2018-08-15T02:18:34Z
http://ijsts.shirazu.ac.ir/?_action=export&rf=summon&issue=443
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
On the theory of strips and Joachimsthal theorem in the Lorentz space , 3
A.
Tutar
O.
Sener
In this study the theory of strips and Joachimsthal Theorem in are generalized to Lorentz space , 3. Furthermore, the Joachimsthal Theorem is investigated when the strip is time-like and space-like.
Curvature strip
semi-Euclidean space
Joachimsthal Theorem
2014
09
01
327
330
http://ijsts.shirazu.ac.ir/article_2083_2e90d0ffa0ad15e2a15584a9c4a564d1.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
Numerical solution of nonlinear optimal control problems based on state parametrization
B.
Kafash
A.
Delavarkhalafi
S. M.
Karbassi
In this paper, solution of nonlinear optimal control problems and the controlled Duffing oscillator, as a special class of optimal control problems, are considered and an efficient algorithm is proposed. This algorithm is based on state parametrization as a polynomial with unknown coefficients. By this method, the control and state variables can be approximated as a function of time. Also, the numerical value of the performance index is obtained readily. The convergence of the algorithm is proved. To demonstrate reliability and efficiency of the proposed algorithm, the scheme is tested on some numerical examples.
Optimal control problems
state parametrization
control linear oscillator and duffing oscillator
weierstrass approximation theorem
2014
09
01
331
340
http://ijsts.shirazu.ac.ir/article_2084_c69f285ac6417631eb1ffcd1ef35724b.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
Some new double sequence spaces in 2-normed spaces defined by two valued measure
E.
Savas
In this paper, following the methods of Connor, we introduce some new generalized double difference sequencespaces using summability with respect to a two valued measure, double infinite matrix and an Orlicz function in 2-normed spaces which have unique non-linear structure and examine some of their properties.
convergence
μ-statistical convergence
convergence in μ-density
Orlicz function
2-normed space
paranormed space
double sequence space
2014
09
01
341
349
http://ijsts.shirazu.ac.ir/article_2085_3b99a9e4420bd0c07a971d79283eb10e.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
On the convergence of the VHPM for the Zakharove-Kuznetsov equations
M.
Matinfar
M.
Ghasemi
M.
Saeidy
In this paper, the variational homotopy perturbation method (VHPM) and its convergence is adopted for theZakharove-Kuznetsov equations (ZK-equations). The aim of this paper is to present an efficient and reliabletreatment of the VHPM for the nonlinear partial differential equations and show that this method is convergent.The convergence of the applied method is approved using the method of majorants from Cauchy-Kowalevskayatheorem of differential equations with analytical vector field.
Variational homotopy perturbation method
convergence
Zakharove-Kuznetsov equation
2014
09
01
351
358
http://ijsts.shirazu.ac.ir/article_2086_2ebee92b345b584f60258c34168703dc.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
The modified Exp-function method and its applications to the generalized K(n,n) and BBM equations with variable coefficients
E. M. E.
Zayed
Abdelaziz
M. A. M.
In this article, the modified exp-function method is used to construct many exact solutions to the nonlineargeneralized K(n,n) and BBM equations with variable coefficients. Under different parameter conditions, explicitformulas for some new exact solutions are successfully obtained. The proposed solutions are found to beimportant for the explanation of some practical physical problems.
Generalized K(n,n) equation with variable coefficients
generalized BBM equation with variable
coefficients
exact traveling wave solutions
exp-function method
2014
09
01
359
365
http://ijsts.shirazu.ac.ir/article_2087_602e34ed8c921b4e63ba5f28759abab8.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
Bounds on the signed distance--domination number of graphs
D. A.
Mojdeh
B.
Samadi
S. M.
Hosseini Moghaddam
Let , be a graph with vertex set of order and edge set . A -dominating set of is a subset such that each vertex in has at least neighbors in . If is a vertex of a graph , the open -neighborhood of , denoted by , is the set , . is the closed -neighborhood of . A function 1, 1 is a signed distance- dominating function of , if for every vertex , Σ 1. The signed distance--domination number, denoted by ,, is the minimum weight of a signed distance--dominating function of . In this paper, we give lower and upper bounds on , of graphs. Also, we determine the signed distance--domination number of graph , (the graph obtained from the disjoint union by adding the edges , ) when 2.
Signed distance--dominating function
th power of a graph
2014
09
01
367
370
http://ijsts.shirazu.ac.ir/article_2088_c5af88b0160d6586dccc3fe99fa04e5f.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
On compact operators on the Riesz -difference sequence spaces-II
M.
Basarir
E. E.
Kara
The compact operators on the Riesz sequence space 1 ∞ have been studied by Başarır and Kara, “IJST (2011) A4, 279-285”. In the present paper, we will characterize some classes of compact operators on the normed Riesz sequence spaces and by using the Hausdorff measure of noncompactness.
-difference sequence spaces
Hausdorff measure of noncompactness
compact operators
2014
09
01
371
376
http://ijsts.shirazu.ac.ir/article_2089_c2027cef32b871f2fca064fba1e0101a.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
On a class of locally dually flat Finsler metrics with isotropic S-curvature
A.
Tayebi
E.
Peyghan
H.
Sadeghi
Dually flat Finsler metrics form a special and valuable class of Finsler metrics in Finsler information geometry,which play a very important role in studying flat Finsler information structure. In this paper, we prove that everylocally dually flat generalized Randers metric with isotropic S-curvature is locally Minkowskian.
Locally dually flat metric
S-curvature
2014
09
01
377
382
http://ijsts.shirazu.ac.ir/article_2090_2921a61244187cfec410862b01289418.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
Interesting dynamic behavior in some discrete maps
L. M.
Saha
S.
Prasad
G. H.
Erjaee
Different discrete models of population dynamics of certain insects have been investigated under various feasible conditions within the framework of nonlinear dynamics. Evolutionary phenomena are discussed through bifurcation analysis leading to chaos. Some tools of nonlinear dynamics, such as Lyapunov characteristic exponents (LCE), Lyapunov numbers, correlation dimension, etc. are calculated for numerical studies and to characterize regular and chaotic behavior. These results are produced through various graphics. Chaotic evolutions of such insect population have been discussed as the parameters attain certain set of critical values. The results obtained are informative and very significant. The correlation dimension for evolution of insect population signifies certain fractal structure.
Bifurcation
Lyapunov exponent
periodic attractor
correlation dimension
2014
09
01
383
389
http://ijsts.shirazu.ac.ir/article_2091_34cd11f40f65ab6d55ba498e0d4cfb19.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
The uniqueness theorem for discontinuous boundary value problems with aftereffect using the nodal points
A.
Dabbaghian
Sh.
Akbarpour
A.
Neamaty
In this paper, uniqueness theorem is studied for boundary value problem with "aftereffect" on a finite interval with discontinuity conditions in an interior point. The oscillation of the eigenfunctions corresponding to large modulus eigenvalues is established and an asymptotic of the nodal points is obtained. By using these new spectral parameters, uniqueness theorem is proved.
Uniqueness Theorem
nodal Points
discontinuous conditions
eigenvalues
eigenfunctions
2014
09
01
391
394
http://ijsts.shirazu.ac.ir/article_2092_d844507e488833158ba158a039e5ac73.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
Characterizations of ternary semigroups by ,qk -fuzzy ideals
M.
Shabir
N.
Rehman
In this paper we have generalized the concepts of ,q-fuzzy ideals, ,q-fuzzy quasi-ideals and,q-fuzzy bi-ideals by introducing the concepts of k ,q -fuzzy ideals, k ,q -fuzzy quasiideals and k ,q -fuzzy bi-ideals in ternary semigroups and several related properties are investigated. Different characterizations of regular and weakly regular ternary semigroups by the properties of these ideals are given.
Ternary semigroups
k ,q -fuzzy ideals
k ,q -fuzzy quasi-ideals
k ,q -
fuzzy bi-ideals
2012
09
01
395
410
http://ijsts.shirazu.ac.ir/article_2093_57f7ed00a6d5cfe0e7519f9746427aae.pdf
Iranian Journal of Science and Technology (Sciences)
Transaction A: Science
1028-6276
1028-6276
2012
36
Issue 3.1
Common fixed point theorems for sequences of mappings with some weaker conditions
Kh.
Abd-Rabou
In this paper, we prove a common fixed point theorem for six mappings (two set valued and four single valued mappings) without assuming compatibility and continuity of any mapping on non complete metric spaces. To prove the theorem, we use a non compatible condition, that is, weak commutativity of type (KB). We show that completeness of the whole space is not necessary for the existence and uniqueness of common fixed point, and give an example to support our theorem. Also, we prove a common fixed point theorem for two self mappings and two sequences set-valued mappings by the same weaker conditions. Our results improve, extend and generalizes the corresponding results given by many authors.
common fixed point
single and set-valued mappings
weak commutativity of type (KB)
2012
09
01
411
416
http://ijsts.shirazu.ac.ir/article_2094_660d64be0d7f9e54361e77aa36b88c32.pdf