A new evolutionary algorithm using the tiger mosquito plague fighthing techniques
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NK Fitness.md


The tiger mosquito algorithm

This is the project of one of the teams in the SIGEvo summer school 2018.

This site can be accessed also through the short url https://git.io/wasabitigers

The final presentation at the summer school is available from GDrive

Description of the algorithm

A new evolutionary algorithm inspired from the tiger mosquito plague fighting techniques. The only things that change is the selection mechanism, which uses a pheromone to represent the direction in which search should go.

An algorithm that removes mosquitoes that carry dengue virus, zykova virus, yellow fever virus. You will choose a pheromone to eliminate mosquitoes, a good pheromone and a bad pheromone to make a pheromone that attracts tiger mosquitoes.

  1. Initialize the pheromone.
    • The way to initialize the pheromone fitness is to use the NK_landscape method.
    • A detailed code of nk_landscape is shown on this page.
  2. Measure the fitness of pheromones.
    • After initialization, the fitness function uses PP (Pheromone-Potential).
    • We will use two different update methods for the pheromone value (P) of each individual.
      • Based on the whole inheritance:
      if x_i selected:
        P(x_i) += constant_value
        P(parents[x_i]) += Q^h*P(x_i)
      • Based on their children
      if x_i selected:
        P(x_i) += constant_value + k * size(childrens)
    • The contents of the PP are shown in This page.
  3. Use the tormant selection to get the results.
    • We use the new selection scheme that the individual is given the score stochastically.
      1. The random value r is sampled from the uniform distribution.
      2. Select the N_tournament solutions in X at random.
      3. If r <= sr, the best candidate solution is set as x* = max_x ( f(x_1), f(x_2), ..., f(x_N_tournament) ) otherwise, the best candidate solution is set as x* = max_x ( P(x_1), P(x_2), ..., P(x_N_tournament) ) .
      4. Return the best solution x*
    • A detailed code of selection is shown on this page
  4. Cross over each result to get a new generation and perform mutation.
  5. repeat

A more extended description will be shown in this page

The team

5 students from all over the world, and a tutor.

Other teams

The tigers team tries to model the spread of mosquitos.