Biogeography-Based Optimization with Orthogonal Crossover

Algorithm 3

Procedure of QOX.

(1)  Begin

(2)  Input: parameters 𝑄 and 𝐹

(3)  Select 𝑀 fulfilling formula (2)

(4)  Randomly select two habitats from the population

(5)  Quantize the domain defined by the two habitats into 𝑄 levels

(6)  Randomly generate F − 1 different integers between 1 and dimension 𝑁

(7)  Divide N-dimension habitat vector into 𝐹 factors

(8)  Apply 𝐿_𝑀(𝑄^𝐹) to generate 𝑀 potential offspring

(9)  Evaluate 𝑀 potential offspring

(10) Select two best habitats to replace their parents

(11) Output: two best habitats

(12) End