Patent ID: 11900255
Assignee: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 3:
4. The method according to claim 1, wherein in step S2, the data after screening and elutriation are pretreated, specifically including:
normalizing the dataset to [−1,1], and the specific processing method is shown in formula (2):, x
      ij
      ′
     
     =
     
      
       
        x
        ij
       
       -
       
        mean
        (
        
         x
         ij
        
        )
       
      
      
       
        max
        ⁡
        (
        
         x
         ij
        
        )
       
       -
       
        min
        ⁡
        (
        
         x
         ij
        
        )
       
      
     
    
   
   
    
     (
     2
     )
    
   
  
 

where, xij is an original data of a production data sample; x′ij is a normalized data; i represents the i-th sample point; j represents the j-th input variable; min(xij), max(xij) and mean(xij) are the minimum, maximum and average values in the original data samples.