This is a data backup strategy, where we keep some number of old copies, randomly deleting one to make room for the latest one.
Tuesday, December 25, 2007
Induced age distribution
Consider a stable population where the mortality rate is uniform with respect to age. Essentially there is one birth per year and one death per year, randomly selected from the population. What is the age distribution pyramid? What is the variance of age of the nth oldest member of the population?
Subscribe to:
Post Comments
(
Atom
)
1 comment :
If there are N tapes,
I think one can expect to
have about (1-1/N)^k
tapes that are k days old.
Obviously, only 0 or 1
tape can be k days old.
So the N ages at a given
time aren't independent.
I thought of Markov chains
but since just one is
removed, I don't see how
to model it.
---
I had a look at your
riemann.src.tar.gz .
I'd be interested to know
what operating systems,
C++ compilers & libraries
(MPI, etc) & for
128-bit floats can compile,
link and run your
source code.
Thanks.
David Bernier
Post a Comment