Patent ID: 11893325
Assignee: CCTEG CHINESE INSTITUTE OF COAL SCIENCE
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 16:
17. The system according to claim 13,
wherein a formula of the total evacuation cost is expressed as:, N
  =
  
   
    
     ∑
     
      i
      ∈
      I
     
    
    
     
      ∫
      
       x
       ∈
       
        A
        i
       
      
     
     
      
       
        Y
        i
       
       [
       
        
         v
         ⁡
         (
         x
         )
        
        +
        
         
          
           α
           ′
          
          ·
          u
         
         ⁢
           
         
          (
          x
          )
         
         ⁢
         
          
           
            
             ❘
             "\[LeftBracketingBar]"
            
            
             f
             ⁡
             (
             x
             )
            
            
             ❘
             "\[RightBracketingBar]"
            
           
           
            
             β
             ′
            
            ·
            
             w
             ⁡
             (
             x
             )
            
           
          
          ·
          
           
            ❘
            "\[LeftBracketingBar]"
           
           
            f
            ⁡
            (
            x
            )
           
           
            ❘
            "\[RightBracketingBar]"
           
          
         
        
       
       ]
      
      ⁢
        
      dx
     
    
   
   +
   
    ρ
    ⁢
    
     
      ∑
      
       i
       ∈
       I
      
     
     
      
       C
       i
      
      (
      
       Q
       i
      
      )
     
    
   
  
 

where N is the total evacuation cost, Ai is the evacuation area corresponding to the evacuation exit i, v(x) is a speed parameter of the evacuating crowd in the differential area x, α′·u(x) is a first congestion degree parameter of the differential area x, u(x) is a coefficient of the first congestion degree parameter, f(x) is a crowd flow vector in the differential area x, β′·w(x) is a second congestion degree parameter of the differential area x, w(x) is a coefficient of the second congestion degree parameter, ρ is a penalty coefficient, Qi is a total number of individuals passing through the evacuation exit i, and Ci is a crowd evacuation cost function at the evacuation exit i.