normalización por área de la información

English translation: normalisation of the data by area

22:52 Oct 11, 2019
Spanish to English translations [PRO]
Science - Chemistry; Chem Sci/Eng / análisis del espectro infrarrojo por componentes principales
Spanish term or phrase: normalización por área de la información
El análisis del espectro infrarrojo por componentes principales mostró que al realizar la normalización por área de la información se obtuvo la discriminación de las muestras con una explicación del 84% de la varianza; los defectos de café con las muestras de café comercial molido se separaron del café de alta calidad y el café instantáneo. Mediante los descriptores químicos obtenidos del espectro infrarrojo se logró diferenciar las muestras de café de alta calidad, comercial e instantáneo
pistacho
Colombia
English translation:normalisation of the data by area
Explanation:
As another suggestion, and a bit of explanation:

Most multi-variate analysis techniques (of which principal component analysis, or PCA is one) work best when the data set is scaled in some way (e.g. so the values for each variable lie between zero and one) and centred (e.g. by subtracting the mean, so the average value is zero).

The scaling is often done by normalising to the peak area or height (e.g. dividing by the area of the biggest peak). This helps avoid peaks with high sensitivity factors (and thus intensities) dominating the analysis. For example, if peak A has values between 30,000 and 50,000 counts, and peak B has values between 0 and 5,000 counts, the large absolute values of peak A appear to describe most of the data, while peak B is actually showing a wider range of variation. By normalising to the maximum peak area, peak A and peak B have similar weight in the analysis.
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John Druce
Spain
Local time: 10:36
Grading comment
thank you
4 KudoZ points were awarded for this answer



Summary of answers provided
4normalisation of the data by area
John Druce
1information standardization by area
neilmac


  

Answers


9 hrs   confidence: Answerer confidence 1/5Answerer confidence 1/5
information standardization by area


Explanation:
Or "standardization of the data/information by area"…

A search for "standardization by area " gets over 1000 hits, in several fields. So, it appears that all we need to do is add whatever is being standardized, in this case data/information.

Example sentence(s):
  • Three different procedures were used to develop the composite totals: raw numbers, standardization by area, and standardization by population
  • A standardization by area would give different results...
neilmac
Spain
Local time: 10:36
Native speaker of: Native in EnglishEnglish
PRO pts in category: 59
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4 days   confidence: Answerer confidence 4/5Answerer confidence 4/5
normalisation of the data by area


Explanation:
As another suggestion, and a bit of explanation:

Most multi-variate analysis techniques (of which principal component analysis, or PCA is one) work best when the data set is scaled in some way (e.g. so the values for each variable lie between zero and one) and centred (e.g. by subtracting the mean, so the average value is zero).

The scaling is often done by normalising to the peak area or height (e.g. dividing by the area of the biggest peak). This helps avoid peaks with high sensitivity factors (and thus intensities) dominating the analysis. For example, if peak A has values between 30,000 and 50,000 counts, and peak B has values between 0 and 5,000 counts, the large absolute values of peak A appear to describe most of the data, while peak B is actually showing a wider range of variation. By normalising to the maximum peak area, peak A and peak B have similar weight in the analysis.

John Druce
Spain
Local time: 10:36
Specializes in field
Native speaker of: English
PRO pts in category: 8
Grading comment
thank you
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