Among these, data reduction techniques can be applied to obtain a reduced representation of the data set that is smaller in volume and speed up the mining process.
其中数据缩减技术最大限度地精简数据量，提高数据挖掘的执行速度与效率。
Based on the information of practical survey upon gravity change before and after Haicheng Earthquake, the paper presents a reduced representation for change of acceleration of gravity with time.
本文根据海城地震前后重力变化的实测资料提出重力加速度随时间变化的一种简化表示。
Thereason SVD is useful, is that it finds a reduced dimensional representation ofour matrix that emphasizes the strongest relationships and throws away thenoise.
SVD非常有用的原因是，它能够找到我们矩阵的一个降维表示，他强化了其中较强的关系并且扔掉了噪音（这个算法也常被用来做图像压缩）。
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