The structural deformation is the principal geological factor that affects the thickness variation of coal seam on a mine field scale.

构造作用是控制井田范围内煤层厚度变化的主要地质因素。

youdao

Wavelet transform was utilized to get coefficients of each scale. Based the coefficient matrix, principal component analysis model was established to diagnose sensor fault.

利用小波变换得到传感器信号在各个尺度上的系数，然后根据尺度系数矩阵建立主元分析模型进行传感器故障诊断。

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The principal and design of a linear gray scale acoustooptic modulation driving source by linear compensation is introduced in this paper.

介绍一种线性灰度声光调制驱动电源的原理、设计及试验结果。

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The Cape Verdean government has taken steps in recent years to promote foreign investment in tourism infrastructure, resulting in large scale development on a few of the ten principal islands.

VOA: standard.2009.06.04

"The principal motivation and the primary competitive justification for BP-Amoco and Exxon-Mobil is to gain the necessary scale to undertake larger and riskier global exploration and development projects that become available, " says Philip K. Verleger Jr.

FORBES: Industry: The John D. way