A Free Search Krill Herd Algorithm for Functions Optimization

Algorithm 3

Opposition-based population initialization.

For  𝑖=1 to NP do

   For  𝑗=1 to NK  do

    𝑋_𝑖,𝑗=𝑋_min,𝑗+𝑋_max,𝑗−𝑋_min,𝑗∗rand;

   End For

 End For

    /* opposition-based population initialization */

 For  𝑖=1 to NP do

   For  𝑗=1 to NK  do

      𝑋^′_𝑖,𝑗=𝑋_min,𝑗+𝑋_max,𝑗−𝑋_𝑖,𝑗;

    End For

 End For

  Select the NP fittest individuals from {𝑃₀∪𝑂𝑃₀} as initial population.