Is differential evolution with penalty function really better than CMODE?

Differential Evolution is used in global optimization over continuous spaces. In general, the task is to optimize certain properties of a system by pertinently choosing the system parameters. Differential evolutions have been widely used to solve difficult constrained optimization problem. Differential evolution gives good results with unconstrained problem. In this paper Differential evolution is used for constrained problem with constraints handling techniques. Penalty function is a most widely used constraints handling technique which is used in this paper. Basically there are two kind of penalty function one is static penalty and other one is dynamic.