[Ifeffit] Commercial MoS2 fit
dmc at pdx.edu
dmc at pdx.edu
Thu Nov 11 10:12:34 CST 2004
Hi List,
I have tried a variety of different things to get this fit to work. It
seems pretty decent now, although, for my two MS paths (4,5) I had to force the
sO^2's to be positive. In the process one of them is now zero. My
parameter 'amp' wants to be 0.5 so I had to set it to 0.7 because I know that
it shouldn't be as low as 1/2. Changing the k-weight doesn't seem to help.
Here's my Data:
Thanks, Dan
Project title : Fitting merge 10_15_04.chi
============================================================
Independent points = 28.581054688
Number of variables = 13.000000000
Chi-square = 5995.284754934
Reduced Chi-square = 384.780419245
R-factor = 0.043668737
Measurement uncertainty (k) = 0.000187262
Measurement uncertainty (R) = 0.006509968
Number of data sets = 1.000000000
Guess parameters +/- uncertainties (initial guess):
e0 = 0.8645560 +/- 1.2283680 (guessed as 0.864556 (1.228344))
ss = 0.0041070 +/- 0.0005190 (guessed as 0.004107 (0.000519))
ss2 = 0.0043590 +/- 0.0005200 (guessed as 0.004359 (0.000520))
ss3 = 0.0217810 +/- 0.0333390 (guessed as 0.021781 (0.033341))
ss4 = 0.0000000 +/- 0.0509500 (guessed as 0.000000 (0.050951))
ss5 = 0.0000360 +/- 0.0063810 (guessed as 0.000036 (0.006382))
ss6 = 0.0028730 +/- 0.0071340 (guessed as 0.002873 (0.007133))
alpha = -0.0012530 +/- 0.0031940 (guessed as -0.001253 (0.003193))
alpha2 = 0.0075160 +/- 0.0022250 (guessed as 0.007516 (0.002225))
alpha3 = -0.0171580 +/- 0.0323200 (guessed as -0.017158 (0.032321))
alpha4 = -0.0165410 +/- 0.1054840 (guessed as -0.016541 (0.105487))
alpha5 = -0.0181860 +/- 0.0187940 (guessed as -0.018186 (0.018795))
alpha6 = 0.0227330 +/- 0.0147690 (guessed as 0.022733 (0.014767))
Def parameters:
delr_1 = -0.0057180
delr_2 = 0.0342980
delr_3 = -0.0782970
delr_4 = -0.0754820
delr_5 = -0.0829880
delr_6 = 0.1037370
Set parameters:
amp1 = .7
Correlations between variables:
ss3 and alpha4 --> 0.8462
e0 and alpha --> 0.8335
ss4 and alpha3 --> -0.6693
e0 and alpha2 --> 0.6159
ss and ss2 --> 0.6114
alpha5 and alpha6 --> -0.5959
alpha4 and alpha5 --> -0.5821
ss4 and ss5 --> -0.5505
ss3 and alpha5 --> -0.5246
alpha and alpha2 --> 0.5146
ss5 and ss6 --> -0.4931
ss2 and alpha5 --> 0.4681
ss5 and alpha3 --> 0.3885
ss6 and alpha6 --> 0.3700
alpha2 and alpha5 --> 0.3208
ss2 and alpha4 --> -0.2992
ss4 and alpha5 --> 0.2955
ss3 and ss4 --> 0.2923
ss5 and alpha2 --> -0.2842
e0 and alpha4 --> -0.2781
ss2 and ss3 --> -0.2677
alpha3 and alpha5 --> -0.2523
All other correlations are below 0.25
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