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

Claim 2:
3. The method according to claim 1, wherein in step S2, the collected converter production data set is screened and washed, specifically including:
deleting duplicate data, delete outliers and extreme outliers; an evaluation of outliers is as follows:, {
     
      
       
        
         
          
           x
           i
          
          >
          
           U
           +
           
            1.5
            IQR
           
          
         
         ❘
         
          
           x
           i
          
          <
          
           L
           +
           
            1.5
            IQR
           
          
         
        
       
       
        Outlier
       
      
      
       
        
         IQR
         =
         
          U
          -
          L
         
        
       
       
         
       
      
      
       
        
         
          
           x
           i
          
          >
          
           U
           +
           
            3
            ⁢
            IQR
           
          
         
         ❘
         
          
           x
           i
          
          <
          
           L
           +
           
            3
            ⁢
            IQR
           
          
         
        
       
       
        
         Extreme
         ⁢
            
         Outlier
        
       
      
     
    
   
   
    
     (
     1
     )
    
   
  
 

where, xi represents the i-th data after the data to be measured is sorted from small to large, U represents the upper quartile, represents the lower quartile, and IQR represents the interquartile range.