September 2010
Some properties of upper fuzzy order
In this paper we shall study some properties for upper fuzzy subgroups, some lemma and theorem for this subject. Key words: Fuzzy set, upper fuzzy subgroups, upper normal fuzzy subgroups, upper fuzzy order.
September 2010
Minimal strongly balanced changeover designs with first residuals
Assuming the presence of first order residual effects, besides periods, experimental units and direct effects of treatments, a class of minimal strongly balanced changeover designs has been proposed. For v treatments, the designs require 2v experimental units for v/2 periods. It is seen that in terms of variances of estimated elementary contrasts in treatment effects, these designs are partially...
September 2010
On Monte Carlo forecast of production using nonlinear econometric models
In this study, Monte Carlo (stochastic) and deterministic forecasts have been carried out. The authors observe that there is reasonable gain in efficiency by Monte Carlo forecast over the deterministic procedure. Key words: Monte Carlo forecast, deterministic forecast, efficiency.
September 2010
Calculation of the electron drift mobility in Cr2+:ZnS and Cr2+:ZnSe materials by rode iteration model
The results of electron drift velocity in Cr2+:ZnS, and Cr2+:ZnSe are calculated for different temperature, free-electron concentrations and compositions. The two-mode nature of the polar optic phonons is considered jointly with deformation potential acoustic, piezoelectric, alloy and ionized-impurity scattering. Band non-parabolocity, admixture of p functions, arbitrary...
September 2010
Analytical model for I-V analysis of buried gate MESFET with modulation frequency characteristics
The analysis of frequency-dependent characteristics of an ion-implanted buried-gate GaAs MESFET, with front side illumination has made achieving improved performance in I-V characteristics possible. When photo energy falls on the device, flow of charge carriers changes corresponding to the change in wave length and frequency of incident light. It has been observed that the...
September 2010
On discussion of the definition of probability
Mathematicians and scientists generally come to know the meaning of probability at a much latter stage of learning and research instead of getting it within the first two years in college or university. This work involving some random experiments with coins and dice, is an attempt to give first or second year students in the university a classroom demonstration of the approaches to the definition...
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