Multiattribute Group Decision-Making Method Based on Quaternary Connection Number of Cloud Models

Algorithm 1

The process of reverse cloud generator

	Input: the quantitative location of N cloud drops in the number field and the certainty of the quantitative concept represented by each cloud drop.
	Output: the expectation value Ex, entropy En and hyperentropy He of a quantitative concept.
	The detailed algorithm is as follows.
	Step 1: solve and through the given cloud drop and the fitting using the least-squares method and the equation of the cloud model’s expectation curve ;
	Step 2: remove the points satisfying and mark the remaining number of cloud drops as ;
	Step 3: solve using the equation ;
	Step 4: solve with the standard deviation function ;
	Step 5: output , , and , which are the expectation value , entropy , and hyperentropy of a certain qualitative concept.