Draft of Win ISI diagram

Working on the main diagram of Win ISI for a presentation. This is a draft and I have to add more tools from new versions.

 

Diagnostics : Peak to Peak (P2P)

Is the way we can see if we have extreme peaks on the noise spectra (like in this case due to encoder noise).

It is the absolute value between the absorbance in the highest peak and the absorbance in the lowest peak.

The manufacturers fix this value according to the  quality of the instrument components.

PUZZLE: Spectra Reconstruction

I use to explain the concept of the spectra reconstruction as trying to fix a puzzle. We have the pieces ( loadings) which once are multiplied by the scores have difference sizes, but the same pattern.





We fit all the pieces, but it can be that the puzzle does not fit correctly, that we have some gaps or spaces not filled,...., etc. is the concept of spectra reconstruction whe we have a error matrix which is the part of the puzzle not completed. It can be small, large,...

One application of this concept is used to define if the spectra belongs to a certain category.

In this blog you will find post about the spectra reconstruction.

Sub-sample and sub-scan concept

When we analyzed heterogeneous samples, it is normal to use large cups. The cups rotate and stops in certain places called sub-samples (suppose eight). At each sub-sample several sub-scans (normally  four) are acquired.

So we have eight sub-samples spectra composed of the average of four sub-scans each. In total we have thirty two scans.

We can get a prediction of each of the sub-samples to get the eight predictions and calculate the standard deviation for every constituent in order to see the heterogeneity of the sample composition.

We can export the average spectrum of all the sub-samples,  the eight spectra of the eight sub-samples or the thirty two total sub-scans for further study.

 

Thanks a lot (more than 250.000 visits to this blog)

Thanks to all of you who read and follow this blog. We have pass the 250.000 visits in this Blog Life and I really happy about that.

 

Of course these are the main countries who visit the Blog, but I appreciate visits from many other places.

                  thanks so much