The background looks suspicious "oscillating", not simply noisy. Maybe
there are some problems with the PSD or generator stability (e.g.
oscillating of cooling water temperature), or any internal or external
data treatment (e.g. smoothing, interpolation..) was applied?
Additionally, your profile
Hi, All:
This morning i tried further refinement work and eventually i got a R value of
0.0518.
As a conlusion, the critical steps are summarized:
Step 1--origin selection: Thanks to the suggestion from Prof. Gottschalk, i
took (1/8,1/8,1/8) origin instead of (0,0,0). It is much improved and it
