Based on the fractal theory and method, the reduction of dimension value before strong earthquake occurrence for self-similar earthquake distribution in time and space has been discussed.
基于分维理论和方法，讨论了自相似的地震时空分布的分维和强震前的降维现象。
A new method of text dimension reduction is brought forward, based on pattern aggregation and adaptive general particle swarm optimization (AGPSO).
将模式聚合和自适应广义粒子群算法相结合，提出了一种文本属性约简新方法。
In this paper, we propose a dimension reduction method based on the tangent bundle.
本文提出了一种基于切丛的维数约简方法。
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