id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-12830		cet-12830		6	.pdf	application/pdf	3378	174	54	In the system there is also a pump that transports inside the device volatile compounds from samples. PCA allows to reveal all possible clusters of samples united by similar characteristics within the main components considered in the hyperplane.	cache/cet-12830.pdf	txt/cet-12830.txt