Projective mapping technique

The sensory professional could decide to restrict the assessors in their product groupings. In other holistic methods, e.g. the projective mapping technique, it is an option to instruct assessors only to report on one type of answer, e.g. textural. This is not recommended for FMS, unless its focus is on specific non-functional terms, e.g. emotional, as the assessors will independently choose the personally most relevant discriminators. 

Now a series of chemometric methods have been used in SAR. Generally speaking, different chemometric methods are suitable for different cases for each kind of these methods has its own advantages and disadvantages, and the best approach should be the combination of several chemometric techniques that complement each other, as that we have discussed in chapter one. So it is helpful to introduce briefly the different chemometric methods widely used in SAR. Here chemical pattern recognition methods will be specially emphasized since different projections can provide plentiful information from different projection maps from the hyperspaces. In SAR practice, some chemical pattern recognition methods are often used as complementary methods in the application of SVM. 

Although the separation of ancient Jun wares and imitation products is rather clear-cut in the PCA projection map, the leave-one-out (LOO) cross-validation test indicates that there is wrong prediction result of one sample for this data set. This is evidently due to the overfitting in PCA analysis and the mathematical model mentioned above is not very reliable. So we re-investigate this problem by SVM technique, and it has been found that the rate of correctness of prediction in LOO cross-validation test by SVM is 100%. 

ABSTRACT Southwest China s geochemical mapping project to measure 76 elements was initiated in 2000. 2700 composite samples were analysed by ICP-MS, XRF and ICP-AES, along with other techniques where necessary. The resulting geochemical maps shows the distribution of majority of the elements in the periodic table. 

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