BUCHI NIRCal User Manual

Page 159

Advertising
background image

Chemometrics

NIRCal 5.5 Manual, Version A

159

Row

Name

Description

47

Spectra y-Unit

Measuring principle

50

Wavelengths Project
Set

Measured wavelength range

51

Wavelengths
Calibration Set

Selected wavelength range (selected datapoints / all data points)

55

Number of Data
Pretreatments

Number of applied data pretreatment

56

Data Pretreatment
Sequence (short)

Short name of the applied data pretreatment

57

Data Pretreatment
Sequence (detailed)

Full name of the applied data pretreatment

60

Method

Selected calculation method / algorithm

61

Max Iterations

Calculation steps before default stop (max. 3000)

62

Mean Centering

Mean centering after pretreatment is activated: yes / no

63

Number of Primary
PCs

Number of selected primary principal components

64

Secondary/Calibration
PCs

Numbers of selected secondary principal components

66

Blow Up Parameter

Title

67

Residual Blow Up

Factor for residual limit calculation (default: 2)

68

Score Blow Up

Factor for score limit calculation (default: 1.05)

70

Max C-Set Spectra
Residual

Highest value of the C-Set residuals

71

Max Allowed Residual
for Calibration

Residual limit of the calibration for the application (max.* 2)


Result of the calculation

Row

Name

Description

Q-Value protocol

74

Q-Value V5

Q-Value of the calibration according version 5. The higher
the Q-Value the best the calibration.

75

Validation Method

Selected Validation method: Validation Set or Cross
Validation

77

C-Set Residual too big*

Number of C-Set spectra with too high residual = rejection of
known (theoretical: 0)

79

Num Properties

Number of properties in the calibration (should be always 1
for the application)

80

Rel. Consistency*

The C- and V-Set should have similar low standard error of
prediction (BIAS corrected):
Abs(SEC-SEP)/(Abs(SEP)+1). Should be close to 0

81

Weighted BIAS*

The absolute V-Set BIAS should be as close to zero as
possible:
Abs(Vset-BIAS)/Abs(Range)

Advertising