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Now showing items 11-20 of 22
Lumping Processes of Periodic ARMA Processes
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Qatar University
, 2004 , Article)
In this article various lumping processes are defined for periodic ARMA (PARMA) processes, namely, the forward, the backward and the cyclic lumping processes. The inter-relations between the parameters of these lumping ...
On the solution of Bicriterion Inter Nonlinear fractional programs with fuzzy parameters in the objective functions
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Qatar University
, 2001 , Article)
In this paper we consider bicriterion integer nonlinear fractional programs having fuzzy parameters in the objective functions. For such programs, a solution algorithm is described to solve the formulated model. The results ...
Generation of Sets of Sequences lsomorphic to Walsh Sequences
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Qatar University
, 2005 , Article)
Walsh sequences of the order 2k, k positive integer, form an additive group generated by Rademacher sequences set of ft-order. Except the zero sequence, Walsh sequences form an orthogonal set. Our present work allows us ...
A Rational Exponential Model for Unconstrained Non-Linear Optimization
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Qatar University
, 2002 , Article)
In this Paper, a new algorithm based on the non-quadratic model is suggested for solving unconstrained optimization problems which modifies the classical conjugate gradiant methods. This technique has the same properties ...
Some Inferential Problems in Finite Population Sampling
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Qatar University
, 2004 , Article)
We review some results in problems of estimating a finite population total (mean) through a sample sur¬vey. Section 2 considers inference under a fixed population model and Section 3 addresses the same prob¬lem when the ...
مقارنة بين مستخدمي اليد اليمنى واليد اليسرى في إدراك المعاني والأشكال والعلاقات الرياضية
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Qatar University
, 2007 , Article)
هدفت الدراسة الحالية إلى الكشف عن الفروق في الإدراك بين مستخدمي اليد اليمنى ومستخدمي اليد اليسرى. اشتملت عينة الدراسة على (50) طالباً وطالبة منهم (25 طالباً، 15 إناث، 10 ذكور) من مستخدمي اليد اليمنى، و(25) طالباً (13 إناث، ...
Common fixed Points for Multimaps in Menger Spaces
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Qatar University
, 2007 , Article)
The aim of this paper is to obtain a common fixed point theorem for multivalued mappings in Menger spaces. Of course this is a new result in Menger spaces. 2000 Mathematics Subject Classification: 47H10, 54H25.
Gravitational Instability of a Radiating Gas Cloud with Variable streams
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Qatar University
, 2001 , Article)
The self-gravitating instability of a radiating gas cloud possessing variable streams is investigated. The self-gravitating force is destabilizing according to restrictions, the radiation has a strong stabilizing influence ...
Some Results Concerning Cobb - Voxman's Conjecture
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Qatar University
, 2000 , Article)
In this paper we shall give some partial results of the following conjecture raised in [3]: Suppose that X is a connected space with a dispersion point p and let f: X —> X be a nonconstant continuous function. Then f(p) = p.
Elliptic surfaces over a genus 1 curve with exactly the pair (I8, IV) of singular fibers
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Qatar University
, 2000 , Article)
In this paper we classify all minimal elliptic surfaces (TI : E —> C) over a genus 1 curve C, with a section and exactly the pair (Is, IV) of singular fibers.