局部极小 [数] local minimum
- 临界点可能是局部极小,局部极大,或者鞍点。
Possibilities could be a local min, a local max or a saddle. - 建模实践表明,改进后的BP算法可能使网络误差函数达到局部极小点,提高了算法的拟合精度。
Applying improved BP algorithm, it shows the improved BP algorithm can easily converge into the local minimum point and it can improve the accuracy of model. - 新算法用PSO算法代替了FCM算法的基于梯度下降的迭代过程,使算法具有很强的全局搜索能力,很大程度上避免了FCM算法易陷入局部极小的缺陷;
The iteration process is replaced by the PSO based on the gradient descent of FCM, which makes the algorithm have a strong global searching capacity and avoids the local minimum problems of FCM.
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