Unsolved question about error analysys
- From: Xufei.Wang@xxxxxxxxx
- Date: 8 Aug 2006 07:02:48 -0700
Dears,
I am making a precise irraidation to target with expected dose Q, using
a irradiator system with several error factors affecting the real
dosage,
if indepemndently considered,
For factor-1, it will cuase error S1, and the real dose will be Q+ S1
For factor-2, it will cause error S2 ,and the real dose will be Q+ S2
.....................
For factor-n, it will cause error Sn,and the real dose will be Q+ Sn
S1,S2....Sn are all random variables, for each of them, the error
distribution is decieded by its own mechanism.But they have different
distributions, not all following a Gaussian distribution.
The Question:
FOR the real dosage Q by the system, which has the error factors
affecting simultaneously
How to decide the relationship between the real dose Q (or real total
error S) and the independent error contribution S1,S2,...Sn ?
Is the direct algebraic sum right ? i.e., S=S1+S2+S3+.....Sn
Or there should be some other more strict calculation for the fianl Q
and S ?
Thanks
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