Add multi-objective PSO algorithms #737
Merged
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This PR introduces two multi-objective Particle Swarm Optimization (PSO) algorithms to the library: MOPSO-CD1 and CMOPSO2. These additions enriches the library's optimization algorithms.
[1] C. R. Raquel and P. C. Naval Jr. An effective use of crowding distance in multiobjective particle swarm optimization. Proceedings of the Annual Conference on Genetic and Evolutionary Computation, 2005, 257-264.
[2] X. Zhang, X. Zheng, R. Cheng, J. Qiu, and Y. Jin. A competitive mechanism based multi-objective particle swarm optimizer with fast convergence. Information Sciences, 2018, 427: 63-76.