The minimum boundary mutation can limit the scope of particles' position and velocity, as well as keep the direction of them.

而最小值边界变异既能有效地限制了粒子位置或速度的幅值，同时可以保持粒子的飞行方向。

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The analysis of the walking state of bilateral leg was focused on in gait switching. The reason of velocity mutation was summarized.

最后，重点分析了该四足机器人双侧腿部进行步态切换时的行走状态，总结出了其速度曲线突变的原因。

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

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。

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At last, it draws into chaotic perturbation operation to do heuristic mutation to accelerate convergence velocity and improve searching capability.

最后，对变化后的个体加以混沌扰动，避免算法陷入局部最优解，提高局部搜索效率。

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At last, it draws into chaotic perturbation operation to do heuristic mutation to accelerate convergence velocity and improve searching capability.

最后，对变化后的个体加以混沌扰动，避免算法陷入局部最优解，提高局部搜索效率。

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