Ontology of modern times and before is dominant substantial ontology, which possesses with characteristics of thinking mode of substantial principle and method of system philosophy.
近代及其以前的本体论是一种显性的实体本体论，具有实体本原观的思维方式和体系哲学的方法两个基本特征。
Rotary drilling is a dominant way in geotechnical engineering borehole surveying. Based on the principle of conversation of energy, the energy for rotary drilling has been analyzed.
旋转钻进是岩上工程钻探的主要钻进方式，从能量守恒原理出发，对旋转钻进的能量进行分析。
A modification on Mahalanobis distance on samples of limited size by compensation for errors of non-dominant eigenvalues and asymmetrical distribution on dominant principle components is proposed.
本文提出了一种有限样本集上基于次特征值误差补偿和优势主向量上非对称分布的马氏距离改进算法。
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