Granularity: investigating equations that convert (T) to (D)

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Title: Granularity: investigating equations that convert (T) to (D)
Author: Catt, Frederick
Abstract: An investigation was done on three published expanded equations, that convert (T) to (D). T. Celio, J. Altman and M. Abouelata published equations of the same form, but with differing constants. Their equations were derived by using an assumed square-wave transmittance trace. The investigation was to find the best predictor of (D) from (T) . Both practical and simulation tests were run. The density range was extended, to check for failure at both high and low densities. Standard granularity measurement procedures were followed as close as possible. Results, from the practical tests, showed Altman 's equation the best predictor of (D). Celio's was a close second, while Abouelata's was a distant third. The simulation test, was run with normal distributions and rectangular distributions. Altman's equation best fit both kinds of density distributions, as well as combinations in between the two.
Description: See file for exact equations.
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Date: 1980-11

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