Tom et all
While our instinct based on some "pre- knowledge" of the aging and drift
processes is to try and fit these to linear or logarithmic curves there
is a third possibility . That is, in fact the aging is not exactly
either and may be better represented in fact be some kind of polynomial
curve. The fact that there may be more than one drift and aging process
at play here would also fit this hypothesis. Ii makes my head hurt to
think about how one would derive the polynomial. Following this thread
further ( and not to discourage your endeavor) but the entire history of
each Xtal may be more of a factor than we initially surmised as well.
Each xtal is at a different point in its journey through TIME and its
history may have as much or more to do with how it behaves at this point
in TIME than we can characterize
Statistically it is also advisable to throw out (from the curve fitting
exercise anyway) unusual units that are clearly not like all the other
kids since they are clearly marching to a different drummer and for the
purpose of this exercise are adding to the NOISE of the analysis 8^)
Dave
--
Dave
[email protected]
www.ArtekManuals.com
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