Assuming that there are s particles in a population, in one iteration, the positions of all particles in the population are compared to obtain the global best position in one iteration, which we use to represent. Then there are:
Suppose that there are s particles in a population, then in an iteration, the positions of all particles in the population can be compared to obtain the global most significant position in an iteration, which we use to express. Then there are:
Assuming that there are s particles in a population, in an iteration, the positions of all particles in the population are compared, and then the global most position in an iteration can be obtained, which is expressed by. There are: