Real time, 69 real time – BUCHI NIRCal User Manual
Page 194
NIRCal 5.5 Software Manual
194
NIRCal 5.5 Manual, Version A
Q-Value V5:
Q = 1 / ( 1 + sum (weights * value))
NOTE
The weights are changed between the NIRCal 4.21 Q-Value calculation weights, so the NIRCal 5 Q-
Values are differing against NIRCal 4.21.
The Q-Value calculation is not changed for the Cluster calibration between NIRCal 4.21 and NIRCal
5.
Explanation of the Q-Value calculation of qualitative calibration:
General term
Aspects of a good
calibration
Weights
C-Set false identified
Should be zero (indicates
wrong user settings)
10
C-Set not identified
Should be zero (indicates
wrong user settings)
10
V-Set false identified
Should be zero (indicates
wrong sample or calibration)
5
V-Set not identified
Should be zero (residual or
distance problem)
1
Cluster Index “Number of
Clusters”
“Number of C-Set Properties”:
should be zero
1
Property Uniformity
Should be small: the spectra
spreading in the clusters is
uniform
1
Property Interference
Should be small: the clusters
are independent from each
other
0.1
w : weights
v : value
n : number of aspects
The Q-Value is normally high for CV and SIMCA calibrations, while a quantitative calibration with
Cross Validation has empty V-Set (Weighted Accuracy = 0), a qualitative calibration using
SIMCA has no neighboring substance (single property calibration: property interference = 0).
3.18.69
Real time
Description
Contains the real time of the spectra creation time in seconds.
Use
For 1D-scatter and dependency plots.
Method
PCR / PLS / Cluster (CLU) / SIMCA / MLR
Matrices ID
98
Tip
Details
Real time is a column vector.
Related Topic
Description
Contains the real time of the spectra creation time in seconds.
Use
For 1D-scatter and dependency plots.
Method
PCR / PLS / Cluster (CLU) / SIMCA / MLR
Matrices ID
99
Tip
Details
Real time is a row vector.
Related Topic