Patent ID: 11925449
Assignee: TSINGHUA UNIVERSITY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 3:
4. The method according to claim 1, wherein the obtaining, according to the covariance matrix, the weight vector of the covariance matrix, further comprises:
calculating, according to the covariance matrix, the weight vector of the covariance matrix by using a second predetermined computational equation, wherein the second predetermined computational equation is:, w
   *
  
  =
  
   
    
     arg
     ⁢
        
     max
    
    
     w
     ∈
     
      
       {
       
        
         -
         1
        
        ,
        1
       
       }
      
      M
     
    
   
   ⁢
      
   
    w
    T
   
   ⁢
   Cw
  
 

where w* is the weight vector, w is a column vector with a size of M*1, a value of elements in the column vector is 1 or −1, T is a transpose of the matrix, and C is the covariance matrix.