So Firstly this paper introduces the text pretreatment technology such as word segmentation, stemming, dimension reducing systematically.
所以,本文首先系统地介绍了文本预处理技术,如分词、词干还原、降维等。
参考来源 - 改进SOM算法在文本聚类中的应用·2,447,543篇论文数据，部分数据来源于NoteExpress
Traditional principal analysis method (PCA) based on linear transform is effective method of seismic attribute dimension-reducing optimization.
传统的基于线性变换的主成分分析法(PCA)是一种有效的地震属性降维优化方法。
The trick is to send neutrinos on a shortcut through a fourth, thus-far-unobserved dimension of space, reducing the distance they have to travel.
诀窍在于通过第4维空间即直到目前还未观察到的空间把中微子发送到一个捷径上，以减少中微子的行程。
Resloving the problem of stress focus don't adopt increasing component dimension, but structure measure by reducing stress focus or locally supplying strength.
解决应力集中问题不应加大构件断面尺寸，而应采用降低应力集中的结构措施或局部补强。
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