精英算子可以确保最佳的PI控制没有丢失的概率。

Elitism operator can ensure that the best PI control don't have the probability of missing.

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讨论了算子（N，P）的最佳逼近阶以及达到此逼近阶的一个充分条件。

The best order of approximation by (N, P) means of T-F series is discussed, and asufficient condition to reach this order is found.

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该算法在运行过程中增加了随机变异算子，通过对当前最佳粒子进行随机变异来增强粒子群优化算法跳出局部最优解的能力。

The new algorithm includes the mutation operator during the running time which can be useful to improve the ability of PSO in breaking away from the local optimum.

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