Migration: The biggest attraction point as the center, to determine the preferential area according to the size of each component. N points randomly generated uniformly within the region, replacing the original point.
Population migration: Focus on the most attractive points, and determine the offer area by the size of each component. N points are generated evenly and randomly within the area, replacing the original points.
Population migration: take the most attractive point as the center, and determine the preferential area according to the size of each component. In this region, n points are generated uniformly and randomly, replacing the original points.