The efficiency and accuracy of the mixed method are improved by the use of the important sampling updating technique.
通过使用重要抽样技术，提高了混合分析法的计算效率和计算精度。
The ANN, which may be especially mentioned, has become an important field that absorbs global researchers 'attentions for its great precision of sampling fit, and thus has got many improved models.
特别是神经网络由于在样本拟合方面能够达到较高的精度，已成为国内外学者研究的一个重要领域，并得到了众多改进的模型。
Calculation variance can be reduced by multiple important sampling technique, and then calculation efficiency can be improved.
复合重要抽样可以减小计算方差，提高计算效率。
Calculation variance can be reduced by multiple important sampling technique, and then calculation efficiency can be improved.
复合重要抽样可以减小计算方差，提高计算效率。
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