Improvement on discrete binary version of the particle swarm optimization

There are two particle swarm optimization (PSO) algorithms according to the encoded mode. One is the real number version, and the other is the discrete binary version (BPSO). The real number version is encoded by real number which is usually used to optimize the successive value. The discrete binary version is encoded by binary number which is often used to solve the combination problem BPSO can also optimize the successive value, whereas the serach efficiency is less than the real number version. Modulation parameter and bias parameter were added to BPSO. Experiments showed that the adjustable BPSO was more flexiable and efficient than the basic BPSO.