Improved Chaotic Quantum-Behaved Particle Swarm Optimization Algorithm for Fuzzy Neural Network and Its Application

Table 5

Classification criteria of the water quality rank.

Items	Rank I	Rank II	Rank III	Rank IV	Rank V
Output value	(0, 1.5)	[1.5, 2.5)	[2.5, 3.5)	[3.5, 4.5)	4.5