Volume 50, issue 2

 

ارسال های اخیر

  • Sign Test for Fuzzy Random Variables 

    Shams, Mehdi؛ Hesamian, Gholamreza (University of Tehran, 2018-12-01)
    This paper extends the sign test to the case where data are observations of fuzzy random variables, and the hypotheses are imprecise rather than crisp. In this approach, first a new notion of fuzzy random variables is ...

  • Inverse eigenvalue problem for matrices whose graph is a banana tree 

    Babaei Zarch, Maryam؛ Shahzadeh Fazeli, Seyed Abolfazl؛ Karbassi, Seyed Mehdi (University of Tehran, 2018-12-01)
    In this  paper, we consider an  inverse eigenvalue problem (IEP) for constructing  a special  kind of acyclic matrices. The problem involves the reconstruction of matrices whose graph is a  banana tree. This is performed ...

  • Changes in Artificial Neural Network Learning Parameters and Their Impact on Modeling Error Reduction 

    Mehrabadi, Somayeh (University of Tehran, 2018-12-01)
    The main objective of this research is to investigate the effect of neural network architecture parameters on model behavior. Neural network architectural factors such as training algorithm, number of hidden layer neurons, ...

  • Minimizing the Number of Tardy Jobs on Single Machine Scheduling with Flexible Maintenance Time 

    Ganji, Fatemeh؛ Jamali, Amir (University of Tehran, 2018-12-01)
    In this study, single machine scheduling with flexible maintenance is investigated with non-resumable jobs by minimizing the weighted number of tardy jobs. It is assumed that the machine stops for a constant interval time ...

  • Linear programming on SS-fuzzy inequality constrained problems 

    Ghodousian, Amin؛ oveisi, shahrzad (University of Tehran, 2018-12-01)
    In this paper, a linear optimization problem is investigated whose constraints are defined with fuzzy relational inequality. These constraints are formed as the intersection of two inequality fuzzy systems and Schweizer-Sklar ...

  • Snakes and Caterpillars in Graceful Graphs 

    Barrientos, Christian؛ Minion, Sarah (University of Tehran, 2018-12-01)
    Graceful labelings use a prominent place among difference vertex labelings. In this work we present new families of graceful graphs all of them obtained applying a general substitution result. This substitution is applied ...

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

    Ponraj, R؛ Maruthamani, J (University of Tehran, 2018-12-01)
    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 ...

  • Tenacity and some other Parameters of Interval Graphs can be computed in polynomial time 

    Moazzami, Dara؛ Vahdat, Niloofar (University of Tehran, 2018-12-01)
    In general, computation of graph vulnerability parameters is NP-complete. In past, some algorithms were introduced to prove that computation of toughness, scattering number, integrity and weighted integrity parameters of ...

  • LP problems constrained with D-FRIs 

    Ghodousian, A.؛ Jafarpour, M. (University of Tehran, 2018-12-01)
    In this paper, optimization of a linear objective function with fuzzy relational inequality constraints is investigated where the feasible region is formed as the intersection of two inequality fuzzy systems and Dombi ...

  • $Z_k$-Magic Labeling of Some Families of Graphs 

    Jeyanthi, P.؛ Jeyadaisy, K. (University of Tehran, 2018-12-01)
    For any non-trivial abelian group A under addition a graph $G$ is said to be $A$-textit{magic}  if there exists a labeling $f:E(G) rightarrow A-{0}$ such that, the vertex labeling $f^+$  defined as $f^+(v) = sum f(uv)$ ...