在此基础上，进一步提出了混合粒子群算法和速度变异粒子群算法两种改进算法提高优化性能。

For improving the predicting results, two improved PSO algorithm are presented also in this paper: Velocity Mutation PSO and hybrid PSO.

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但是粒子群算法没有遗传操作如交叉和变异，而是根据自己的速度来决定搜索。粒子还有一个重要的特点是记忆。

But the particle swarm without the inheritance operation such as cross and variation, decided the searching according to its speed, and particle has an important memory character.

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