March 2012

Mathematics as a sort of technology

Mathematics has double characters including science and technology. The direct research object of mathematics is mode which is the carrier of information, and the evolvement of mode is the process of information processing and information conversion. This paper has described the three characters of mathematic: operation, instrument and invention, which shows mathematic is a sort of technology. In addition to some expels...

Author(s): Xiong Zhang

March 2012

Temperature-dependent thermal stress determination of an isotropic circular annular fin

This paper is concerned with an inverse thermoelastic problem in which we need to determine the temperature distribution, unknown temperature gradient, displacement, stress functions and thermal stresses on the outer curved surface of a thin annular fin when the interior heat flux is known. Finite classical Marchi-Zgrablich transform and Laplace transform techniques have been utilized to obtain the solution for the...

Author(s): Navneet Kumar, Warbhe  M. S. and Khobragade N. W.  

March 2012

Improving the order selection of moving average time series model

We propose an approach could be used to select the right order of moving average model. We used simulation study to compare four model selection criteria with and without the help of our approach. The comparison of the four model selection criteria was in terms of their percentage of number of times that they identify the right order of moving average model with and without the help of our approach. The simulation...

Author(s): Ali Hussein Al-Marshadi