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Evaluating Networked Systems
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Robert Ricci
Evaluating Networked Systems
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c6233e59
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c6233e59
authored
Apr 02, 2015
by
Robert Ricci
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lecturenotes.tex
lectures/lecture18/lecturenotes.tex
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lectures/lecture18/lecturenotes.tex
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c6233e59
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@@ -87,7 +87,10 @@
\2
Parameter
$
\lambda
$
- inverse of mean
\3
Sometimes called rate, eg. time between arrivals
\2
Memoryless: eg. time between arrivals
\3
Consider interarrivals: no matter how long you have already
waited, your expected additional wait time is the same
\3
No other continuous distribution has this property
\3
(In the discrete realm, it's geometric that has it)
\3
This property makes analysis simple
\3
But you have to be sure it's true!
\2
\emph
{
Examples?
}
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@@ -102,6 +105,7 @@
\1
Normal
\2
We've talked plenty about, remember that sum of iid variables tends
towards normal
\2
Central limit theorem
\1
Lognormal
\2
Logarithms turn multiplication into addition:
$
\log
xy
=
\log
x
+
\log
y
$
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@@ -128,7 +132,7 @@
\2
``A value of k > 1 indicates that the failure rate increases with time.''
\1
For next time:
\2
Papers
\#
4 handed out
\2
Papers
\#
4 handed out
soon
\2
Weekly report due Friday midnight
\end{outline}
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