Large amounts of unlabeled samples are easy to collect indeed, with respect to the cost of labeled sample collection.
This counterintuitive result suggests that it might be better to resort to unsupervised method when the cost of labeling the data is high where the class information would not lead to a dramatic improvement in recognition rate.
Although the synthesis of peptides labeled with stable isotopes is relatively simple, there are several factors limiting application of these standards in proteomic research: cost of labeled derivatives of amino acids, time needed to obtain labeled peptide and problems with quantification of the standard.
An additional practical disadvantage is the prohibitively high cost of labeled substrate.
The cost of labeled carbon is the major component of the overall cost for C/N labeling.
On the other hand, we may, to some extent, have underestimated and biased against the populations below 150 nm in diameter because we optimized our labeling procedure to enhance specificity at the cost of labeling density.
However, in many real-world problems this paradigm may be ill-suited due to (1) the dearth of training examples and (2) the costs of labeling the required information to train the system.
Their sole focus on the biomedical/disease model, the cost of labeling and stigma have been highlighted as limitation.
This opinion is consistent with the fact that the issue of labelling cost did not emerge clearly in our research.
Aaditya Mattoo, of the World Bank, points out that because trade barriers in Asia are already relatively low, the benefit of a small further reduction in barriers in one market is tiny.Bilateral deals come laden with complicated rules about where products originate rules which impose substantial costs of labelling and certification on firms.
To assess the true costs of labelling, more research is needed in several areas, including expanded labelling, as new policies are developing in this area.
