Definition 4.26 If DF concept $\left(\stackrel{\leftharpoonup}{c},\stackrel{\rightharpoonup}{c}\right)=\left(\left(\stackrel{\leftharpoonup}{X},\stackrel{\rightharpoonup}{X}\right),\left(\stackrel{\leftharpoonup}{Y},\stackrel{\rightharpoonup}{Y}\right)\right)$ has only one direct child node, DF concept is the DF critical concept. Otherwise, it is called the DF extension concept.

According to the above definition, if the critical concept is $({\stackrel{\leftharpoonup}{c}}_{1},{\stackrel{\rightharpoonup}{c}}_{1})=(({\stackrel{\leftharpoonup}{x}}_{1},{\stackrel{\rightharpoonup}{x}}_{1}).$$({\stackrel{\leftharpoonup}{y}}_{1},{\stackrel{\rightharpoonup}{y}}_{1})),({\stackrel{\leftharpoonup}{x}}_{2},{\stackrel{\rightharpoonup}{x}}_{2}),({\stackrel{\leftharpoonup}{y}}_{2},{\stackrel{\rightharpoonup}{y}}_{2}))),\dots ,(({\stackrel{\leftharpoonup}{x}}_{m},{\stackrel{\rightharpoonup}{x}}_{m}),({\stackrel{\leftharpoonup}{y}}_{m},{\stackrel{\rightharpoonup}{y}}_{m}))$ in dynamic fuzzy background $B:(X,Y,I),(\stackrel{\leftharpoonup}{X},\stackrel{\rightharpoonup}{X})=({\stackrel{\leftharpoonup}{x}}_{1},{\stackrel{\rightharpoonup}{x}}_{1})\cup ({\stackrel{\leftharpoonup}{x}}_{2},{\stackrel{\rightharpoonup}{x}}_{2})\cup \dots ({\stackrel{\leftharpoonup}{x}}_{m},{\stackrel{\rightharpoonup}{x}}_{m})\mathrm{and}Y=({\stackrel{\leftharpoonup}{y}}_{1},{\stackrel{\rightharpoonup}{y}}_{1})$$\cap ({\stackrel{\leftharpoonup}{y}}_{2},{\stackrel{\rightharpoonup}{y}}_{2})\cap \dots ({\stackrel{\leftharpoonup}{y}}_{}$

Get *Dynamic Fuzzy Machine Learning* now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.