Patent ID: 11948180
Assignee: UIF (UNIVERSITY INDUSTRY FOUNDATION), YONSEI UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. The system of claim 1, wherein the processor is further configured to calculate a repeat-purchase propensity by Equations 6 and 7 below:, Stickiness
          ⁢
          
            
          
          ⁢
          
            (
            j
            )
          
        
        =
        
          (
          
            1
            -
            
              
                
                  ∑
                  
                    i
                    =
                    1
                  
                  n
                
                ⁢
                
                  
                
                ⁢
                
                  unique
                  ⁢
                  
                    
                  
                  ⁢
                  item
                  ⁢
                  
                    
                  
                  ⁢
                  
                    (
                    
                      i
                      ,
                      j
                    
                    )
                  
                
              
              
                
                  ∑
                  
                    k
                    =
                    1
                  
                  n
                
                ⁢
                
                  
                
                ⁢
                
                  amount
                  ⁢
                  
                    
                  
                  ⁢
                  
                    (
                    
                      i
                      ,
                      j
                    
                    )
                  
                
              
            
          
          )
        
      
    
    
      
        (
        6
        )
      
    
  
  
    
      
        
          
            unique
            ⁢
            
              
            
            ⁢
            item
            ⁢
            
              
            
            ⁢
            
              (
              
                i
                ,
                j
              
              )
            
          
          =
          
            
              1
              ⁢
              
                
              
              ⁢
              if
              ⁢
              
                
              
              ⁢
              amount
              ⁢
              
                
              
              ⁢
              
                (
                
                  i
                  ,
                  j
                
                )
              
            
            ≥
            1
          
        
        ,
        
          else
          ⁢
          
            
          
          ⁢
          0
        
      
    
    
      
        (
        7
        )
      
    
  

where Stickiness(j) denotes a repeat-purchase propensity of consumer j, amount(i,j) is a quantity of products i purchased by consumer j, n is a total number of products, and unique item(i,j) has a value of 1 when consumer j has purchased product i and has a value of 0 when consumer j has not purchased product i.