Abstract There are many complex multi-objective optimization problems in the real world, which difficult to solve using traditional methods. Multi-objective particle swarm is one of effective algorithms such problems. This paper proposes a with dynamic population size (D-MOPSO), helps compensate for lack convergence and diversity brought by optimization, makes full use existing resources search...

A cohor t is a fixed population. Its membership is permanent (even after death)8, 14). Examples are as follows: people born in Kagoshima, and the alumni of Hirosaki University. A cohort study follows a fixed population. Unfixed populations are called dynamic populations (open populations). The membership of a dynamic cohort is not permanent. Examples are as follows: Hirosaki University students...

We take a well-known dynamic model of an isolated, unstructured population and modify this to include a factor that allows for a reduction in fitness due to declining population sizes, often termed an Allee effect. Analysis of the behaviour of this model is carried out on two fronts - determining the equilibrium values and examining the stability of these equilibria. Our results point to the st...