Constrained Multiobjective Biogeography Optimization Algorithm

Algorithm 2

Disturbance migration operator 𝑇_𝑖.

For 𝑖=1 to 𝑁₁

  Randomly select two individuals 𝑑_𝑠1, 𝑑_𝑠2 from the population 𝐷(𝑡)

  Select individual 𝑑_𝑠 based on its immigration rate 𝜆_𝑆

  For 𝑗=1 to n

    If rand < 𝜆_𝑖 then

       𝑝_𝑖,𝑗(𝑡+1)=𝑑_𝑠,𝑗(𝑡)+𝜔(𝑡)(𝑑_𝑠1,𝑗(𝑡)−𝑑_𝑠2,𝑗(𝑡))

    Else

       𝑝_𝑖,𝑗(𝑡+1)=𝑑_𝑖,𝑗(𝑡)

    End if

  End for

End for