Patent ID: 11959900
Assignee: CENTRAL SOUTH UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 3:
4. The method according to claim 3, wherein the step of analyzing and selecting the plurality of associated air quality monitoring stations with the greatest environmental impact on the train side after the T minutes in the step D is, specifically, to perform analysis and selection in the following steps:
a. calculate a degradation degree ETi imposed by the each air quality monitoring station on air quality on the train side after the T minutes by using the following equation:, E
   T
   i
  
  =
  
   
    p
    
     N
     ⁢
     
      d
      T
      i
     
    
   
   +
   
    
     (
     
      1
      -
      p
     
     )
    
    ×
    
     NMI
     ⁡
     (
     
      
       A
       
        2
        ⁢
        0
        ⁢
        0
       
       C
      
      ;
      
       A
       
        2
        ⁢
        0
        ⁢
        0
       
       
        S
        ,
        i
       
      
     
     )
    
   
  
 

wherein, NdTi is a relative distance between a normalized air quality monitoring station i and the train after the T minutes; p is a diffusion factor; and NMI(A200C; A200S,i) is mutual information between the normalized air quality monitoring station i and the train;
b. optimize a value of the diffusion factor by using a multi-objective and multi-verse optimization algorithm; and
c. select, according to the degradation degree calculated in the step a, a plurality of air quality monitoring stations imposing a greatest degradation degree as final air quality monitoring stations with the greatest environmental impact on the train side.