Supervised machine learning problems can be divided into classification and regression.
These attributes were divided into classification terms, e.g., nervous system (anatomical system), brain (organ), and glioma (cell).
According to whether or not selecting the training samples with class labels in advance, the PolSAR target classification method can be divided into supervised classification [6 15] and unsupervised classification [16 23].
Temperature sensors can be divided into two classifications: temperature-dependent resistance elements and self-generating thermocouples.
If, according to Frank, the world can be divided into two classifications — "rule skeptics," who question formal legal rules, and "fact skeptics," who question the particularities of a case — then Sotomayor might be considered a self-skeptic: someone who, like a golfer videotaping her swing, is constantly checking herself for tics and hitches.
Spectral problems can be divided into two classifications.
Pneumothorax can be divided into three classifications: simple, open, and tension.
The phylogenetic tree (Fig. 6) shows that the identified sequences could be divided into three classifications, Proteobacteria, Firmicutes and Acidobacteria.
Rhinosinusitis can be divided into four classifications regarding the sign, symptom, and course of disease- acute, subacute, recurrent, and chronic [1].
On the basis of taxonomy, 55 tea germplasm in Taiwan can be divided into three classifications, including sinensis type (S and SA), assamica type (A and AS) and wild species in Taiwan (F and FY) (Table 1).
In terms of methods, the synthesis of free-standing silicide NWs can be divided into four classifications, which are silicidation of silicon nanowires [6 11], delivery of silicon to metal films [12 16], reactions between transition metal sources and silicon substrates [17 22], and simultaneous metal and silicon delivery [23 25].
