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However, because of the influence and constriction of many factors, it becomes one of the most difficult tasks to consummate education. 然而， 使教育完善，由於要受到多種因素的影響和制約又使它成爲(wèi)一項(xiàng)最艱難的工作。
The improved particle swarm algorithm based on constriction factors can guarantee the constringency of the algorithm, while the restriction of velocity can be released. 基於收縮因子改進(jìn)的粒子群算法可以保証算法的收歛性，同時(shí)使得速度的限制放松。