Volume 2, Issue 2 (2006) | Journal of Mathematics and Statistics

A Switching Mechanism Detection to Reduce Complexity in Multiuser Detection for DS-CDMA Systems

Rekha Agarwal — 2007-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2007; doi:10.3844/jmssp.2006.368.372

We present a reduced complexity switching mechanism which uses either matched filter or Parallel Interference Cancellation (PIC) detector based on channel characteristics. The main criterion of taking...

A Branching Cell Population Model Allowing for Cell Death

Mounir Aout — 2006-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2006; doi:10.3844/jmssp.2006.373.377

We use multi-type branching processes to describe a general cell population model allowing for cell death. Unlike the case without cell death, the process can be subcritical, critical or supercritical...

Folding of Trefoil Knot and its Graph

M. El-Ghoul — 2006-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2006; doi:10.3844/jmssp.2006.378.385

In this study, we introduce the effect of the folding, conditional folding, retraction and conditional retraction on trefoil knot and its graph. We introduce the sheeted trefoil knot and the folding a...

An Evolution Strategy for the Induction of Fuzzy Finite-state Automata

Mozhiwen — 2006-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2006; doi:10.3844/jmssp.2006.386.390

This study presents an evolution strategy used to infer fuzzy finite-state automata from examples of a fuzzy language. We describe the fitness function of an generated automata with respect to a set o...

Least Square Approximation by Linear Combination of Exponential Functions

Bahman Mehri — 2006-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2006; doi:10.3844/jmssp.2006.391.394

Here we were concerned with least square approximation by exponential functions for given data. In this manuscript, we approximate the given data such that this approximant satisfies a differential eq...

Fuzzy Automata Induction using Construction Method

Mo Z. Wen — 2006-06-30

Journal of Mathematics and Statistics, Published online: 30 June 2006; doi:10.3844/jmssp.2006.395.400

Recurrent neural networks have recently been demonstrated to have the ability to learn simple grammars. In particular, networks using second-order units have been successfully at this task. However, i...