Volume 28, Issue 2

 

ارسال های اخیر

  • THE INVERSE OF COVARIANCE MATRICES FOR THE ARMA (p, q) CLASS OF PROCESSES 

    CHINIPARDAZ, R.؛ COX, T. F. (Springer, 2004-12-01)
    Analysis of time series data can involve the inversion of large covariance matrices. For theclass of ARMA (p, q) processes there are no exact explicit expressions for these inverses, except for theMA (1) process. In practice, ...

  • ANALYSIS OF SPATIAL POINT PATTERNS BY KERNEL IDENTIFICATION 

    VAHIDI-ASL, M. Q.؛ FAGHIHI, M. R. (Springer, 2004-12-01)
    In the analysis of spatial point patterns, complete spatial randomness (CSR) hypothesis,which is a restriction of a homogenous Poisson process to study region A, operates as a dividinghypothesis between “regular" and ...

  • REAL GROUP ALGEBRAS 

    EBADIAN, A.؛ MEDGHALCHI, A. R. (Springer, 2004-12-01)
    In this paper we initiate the study of real group algebras and investigate some of its aspects.Let L1 (G) be a group algebra of a locally compact group G,τ :G →G be a group homeomorphismsuch that τ 2 =τοτ = 1, the identity ...

  • COUNTEREXAMPLES IN a−MINIMAL SETS 

    AYATOLLAH ZADEH SHIRAZI, F.؛ SABBAGHAN, M. (Springer, 2004-12-01)
    Several tables have been given due to a − minimal sets. Our main aim in this paper is tocomplete these tables by employing several examples.

  • DIRECT SYSTEM AND DIRECT LIMIT OF v H -MODULES 

    GHADIRI, M.؛ DAVVAZ, B. (Springer, 2004-12-01)
    The largest class of algebraic hyper structures satisfying the module like axioms is the v H -module. In this paper, we consider the category of v H -modules and prove that the direct limit alwaysexists in this category. ...

  • IMPROVED MIT BAG MODEL WITH HYPER CENTRAL INTERACTING POTENTIAL 

    RAJABI, A. A. (Springer, 2004-12-01)
    An improved MIT bag model with hyper central interactions is used to calculate the staticproperties of hadrons containing u, d, s and c quarks. We present a theoretical approach to the internalstructure of three-body hyper ...

  • THE STRONG LAW OF LARGE NUMBERS FOR PAIRWISE NEGATIVELY DEPENDENT RANDOM VARIABLES 

    NILI SANI, H. R.؛ AZARNOOSH, H. A.؛ BOZORGNIA, A. (Springer, 2004-12-01)
    In this paper, strong laws of large numbers (SLLN) are obtained for the sums ƒ°=nii X1, undercertain conditions, where {X ,n . 1} n is a sequence of pairwise negatively dependent random variables.

  • CONTROLLING CHAOS IN 2-DIMENSIONAL SYSTEMS 

    SAHA, L. M.؛ ERJAEE, G. H.؛ BUDHRAJA, M. (Springer, 2004-12-01)
    A chaos control method suggested by Erjaee has been reviewed. It has been shown that thistechnique can be applied in various evolutionary systems of 2-dimensional types. The method has beenapplied for cases of the Henon ...

  • STUDY OF THE DISTORTED LAYER STRUCTURE OF SILICON WAFERS BY THE METHOD OF PLASMA-CHEMICAL ETCHING AFTER MECHANICAL MACHINING PROCESSES 

    BIDADI, H.؛ SOBHANIAN, S.؛ HASANLI, SH.؛ MAZIDI, M.؛ KARIMI, M. (Springer, 2004-12-01)
    In this experimental work, by using the method of plasma-chemical etching, we have dealtwith the causes of the creation of a distorted layer on the surface of silicon wafers during mechanicalmachining processes, in addition, ...

  • RING RESONATOR COUPLED M-Z ALL-OPTICAL SWITCH BY USING A PUMPED NONLINEAR DIRECTIONAL COUPLER 

    BANANEJ, A.؛ Li, C. F.؛ XU, G. M. (Springer, 2004-12-01)
    We propose a new ring resonator side-coupled M-Z interferometer all-optical switch throughthe pumped nonlinear directional coupler. By controlling pump power P to lead the coupler reflectivityr approaching to 1, the resonator ...

  • GREEN FUNCTION OF AXISYMMETRIC MAGNETOSTATICS 

    DINI, F.؛ KHORASANI, S.؛ AMROLLAHI, R. (Springer, 2004-12-01)
    A simple new closed form of the Green function for axisymmetric magnetostatic problemsis found analytically in cylindrical coordinates. The result is verified by applying several examples.