Volume 55 (2023)
Volume 54 (2022)
Volume 53 (2021)
Volume 52 (2020)
Volume 51 (2019)
Volume 50 (2018)
Volume 49 (2017)
Volume 48 (2016)
Volume 47 (2016)
Volume 46 (2015)
Volume 45 (2014)
Volume 44 (2013)
Volume 43 (2009)
Volume 42 (2008)
Volume 41 (2007)

ارائه مدل توسعه یافته انعطاف‌پذیری و کارایی سازمان در محیط فازی

Masoud Rabbani; Reza Tavakkoli Moghaddam; Yasaman Khodadadegan; Mo'eed Hagh Nevis

Volume 41, Issue 7 , February 2009, , Pages 887-896


  Nowadays, the problem of the flexibility in any organization has essential importance and the associated investigation with the organizational efficiency and performance is considered. In real-world situation, the process of decision making is often based on linguistic and mental data, so applying fuzzy ...  Read More

روش بردارهای ریتز نوین برای تحلیل دینامیکی سازه‌ها در حوزة فرکانس

Seyyed Asghar Arjmandi; Vahid Lotfi

Volume 41, Issue 1 , March 2007, , Pages 1-10


  Ritz method is one of the techniques for reduction of the degrees of freedom. Efficiency of Ritz method depends on used vectors. The Ritz method uses load depended vectors in spite of modal method and for this reason it is expected to give better results than modal method. This is the advantage of Ritz ...  Read More

بررسی ناپایداری جریان های دوبعدی موازی در سیالات ویسکوالاستیک با استفاده از روش های شبه طیفی

Navid Khabbazi; Keyvan Sadeghi

Volume 43, Issue 1 , April 2009, , Pages 31-37


  In the present work, the effect of fluid’s elasticity was investigated on the hydrodynamic instability of Blasius flow. To determine the critical Reynolds number as a function of the elasticity number, a two-dimensional linear temporal stability analysis was invoked. The viscoelastic fluid is assumed ...  Read More

Profiles of covering arrays of strength two

Charles Colbourn; Jose Torres-Jimenez

Volume 44, Issue 1 , December 2013, , Pages 31-59


  Covering arrays of strength two have been widely studied as combinatorial models of software interaction test suites for pairwise testing. While numerous algorithmic techniques have been developed for the generation of covering arrays with few columns (factors), the construction of covering arrays with ...  Read More

Vulnerability Measure of a Network - a Survey

Dara Moazzami

Volume 49, Issue 2 , December 2017, , Pages 33-40


  In this paper we discuss about tenacity and its properties in stability calculation. We indicate relationships between tenacity and connectivity, tenacity and binding number, tenacity and toughness. We also give good lower and upper bounds for tenacity. Since we are primarily interested in the case where ...  Read More

A generalization of zero-divisor graphs

Peyman Nasehpour

Volume 51, Issue 2 , December 2019, , Pages 35-45


  In this paper, we introduce a family of graphs which is a generalization of zero-divisor graphs and compute an upper-bound for the diameter of such graphs. We also investigate their cycles and cores  Read More

Mixed cycle-E-super magic decomposition of complete bipartite graphs

G. Marimuthu; S. Stalin Kumar

Volume 47, Issue 1 , June 2016, , Pages 37-52


  An H-magic labeling in a H-decomposable graph G is a bijection f : V (G) ∪ E(G) → {1, 2, ..., p + q} such that for every copy H in the decomposition, ΣνεV(H) f(v) +  ΣeεE(H) f(e) is constant. f is said to be H-E-super magic if f(E(G)) = {1, 2, · ...  Read More

Optimization of profit and customer satisfaction in combinatorial production and purchase model by genetic algorithm

Fatemeh Ganji; Zahrasadat Zamani

Volume 51, Issue 1 , June 2019, , Pages 43-54


  Optimization of inventory costs is the most important goal in industries. But in many models, the constraints are considered simple and relaxed. Some actual constraints are to consider the combinatorial production and purchase models in multi-products environment. The purpose of this article is to improve ...  Read More

$4$-Total prime cordial labeling of some cycle related graphs

R Ponraj; J Maruthamani

Volume 50, issue 2 , December 2018, , Pages 49-57


  Let $G$ be a $(p,q)$ graph. Let $f:V(G)\to\{1,2, \ldots, k\}$ be a map where $k \in \mathbb{N}$ and $k>1$. For each edge $uv$, assign the label $\gcd(f(u),f(v))$. $f$ is called $k$-Total prime cordial labeling of $G$ if $\left|t_{f}(i)-t_{f}(j)\right|\leq 1$, $i,j \in \{1,2, \cdots,k\}$ where $t_{f}(x)$ ...  Read More

Toughness of the Networks with Maximum Connectivity

D. Moazzami

Volume 46, Issue 1 , December 2015, , Pages 51-71


  The stability of a communication network composed of processing nodes and communication links is of prime importance to network designers. As the network begins losing links or nodes, eventually there is a loss in its effectiveness. Thus, communication networks must be constructed ...  Read More

Edge pair sum labeling of some cycle related graphs

P. Jeyanthi; T. Saratha Devi

Volume 48, Issue 1 , December 2016, , Pages 57-68


  Let G be a (p,q) graph. An injective map f : E(G) → {±1,±2,...,±q} is said to be an edge pair sum labeling if the induced vertex function f*: V (G) → Z - {0} defi ned by f*(v) = ΣP∈Ev f (e) is one-one where Ev denotes the set of edges in G that are ...  Read More

Improper Filter Reduction

Fatemehzahra Saberifar; Ali Mohades; Mohammadreza Razzazi; Jason J. M. O'Kane

Volume 50, Issue 1 , June 2018, , Pages 69-99


  Combinatorial filters, which are discrete representations of estimationprocesses, have been the subject of increasing interest from the roboticscommunity in recent years.%This paper considers automatic reduction of combinatorial filters to a givensize, even if that reduction necessitates changes to the ...  Read More

بررسی تعادل شبکه های کابلی الاستیک خطی با استفاده از کمینه سازی انرژی پتانسیل

Ali Asghar Atai; Masoud Shariat Panahi; Kave Ebrahimi

Volume 42, Issue 1 , April 2008, , Pages 87-96


  Cables have always been under consideration as a structural element because of important features such as large strength to weight ratios and long spans. Their equilibrium analysis is an important issue in this regard. But this analysis involves highly nonlinear equations arising from large deformations ...  Read More

بررسی تصفیه پذیری هوای آلوده صنعتی به تری‌اتیل‌آمین

Homa Keshavarzi Shirazi; Ayyoub Torkian; Ali Akbar Azimi; Naser Mehrdadi

Volume 41, Issue 2 , July 2007, , Pages 225-232


  Performance of a pilot Biofiltration system in removing of Triethylamine (TEA) vapor from air stream was evaluated in this study. Experiments were conducted with two 6-L three section biofilters containing a mixture of compost (60%) and wood chips (40%). The systems were operated at 20±2 and 30±1 ?C. ...  Read More

بررسی عملکرد هیدروسیکلون‌های اولیه و ثانویه مدار خردایش کارخانه فسفات اسفوردی

Ali Dehghani Ahmadabadi; Ziaeddin Pourkarimi; Mohammad Noparast

Volume 43, Issue 3 , September 2009, , Pages 259-269


  Due to the importance of material classification issue in grinding circuits, the ‎performance of primary and secondary hydrocyclones in grinding circuit of Esfordi ‎phosphate plant was investigated by sampling within 7 days from feed, overflow, and ‎underflow‎ of these hydrocyclones. At first, ...  Read More

بررسی تحلیل دینامیکی و تصحیح قیود تماس نقطه به وجه با استفاده از روش لاگرانژ

Seyyed Amir Reza Beyabanaki; Ahmad Jafari

Volume 41, Issue 3 , September 2007, , Pages 273-285


  In this paper, first the validity of 3-D DDA is examined by comparing its solution for dynamic block displacement with analytical solution. Displacement of a single block on an inclined plane subjected to a dynamic loading is studied for analytical solution with respect to the frictional resistance offered ...  Read More

تعیین و پهنه‌بندی نرخ ممان لرزه‌ای ژئودزی: مطالعه خاص شبکه سراسری ژئودینامیک ایران

Zahra Mousavi; Behzad Vosoghi

Volume 42, Issue 3 , July 2008, , Pages 361-370


  A new and significant source of information on earthquake studies has been provided by space geodesy. The data which are gathered by various techniques of space geodesy, can quantify potential of seismic activity in the region of interest. To achieve this goal, the main advantage of extra-terrestrial ...  Read More

تاثیر ارتفاع در فرایند جدایش غیردائم موشکهای چند مرحله‌ای

Hossein Ahmadi Kia; Ahmad Reza Pishevar

Volume 41, Issue 4 , November 2007, , Pages 379-389


  Effect of altitude is discussed in the unsteady separation of multi stage rockets. Axisymmetric, unsteady and turbulent Navier stokes equations are solved numerically. The governing equations are split into a hyperbolic inviscid part and a parabolic diffusion part. The hyperbolic part is solved by an ...  Read More

بهینه سازی سازه های فضاکار بادرنظرگرفتن احتمال خرابی اعضاء و گره ها به کمک الگوریتم وراثتی اصلاح شده

Mohammad Reza Ghasemi; Mohammad Reza Mostakhdemin Hosseini

Volume 42, Issue 4 , August 2008, , Pages 477-485


  Due to the probabilistic nature and uncertainties of structural parameters, reliability-based optimization will enable engineers to account for the safety of the structures and allow for its decision making applicability. Thus, reliability-based design will substitute deterministic rules of codes of ...  Read More

شناسایی و تفکیک زون‌های آلتراسیون در محدوده اندیس مس- طلا سربیشه با استفاده از داده‌های ماهواره‌های ASTER

Soheila Aslani; Abbas Bahroudi; Jalal Karami; Amir Khodras Haghighi

Volume 42, Issue 5 , September 2008, , Pages 607-615


  Sarbisheh mineral occurrence is located in the vicinity of the Tourshab village about 50 km south of Birjand, the center of Southern Khorassan province, east Iran. The predominant geologic characteristics of the region are highly-tectonic deformation, and intrusive, granodiroritic-dioritic, to volcanic, ...  Read More