Using three-dimensional space vectors, this paper describes a simple method for detecting the distorted current without any coordinate transformation.
利用三维空间矢量，提出了一种新型的无需坐标变换的三相电路畸变电流检测方法。
The energy levels for three-dimensional coordinate-momentum coupled quantum harmonic oscillators are presented by using invariant eigen-operator method.
利用不变本征算符法给出了坐标-动量耦合的三模耦合量子谐振子的能级信息。
The growth and development of upland rice root system were studied by three-dimensional coordinate container method.
采用自创的“三维坐标容器法”，研究了潮砂土、红壤土、水稻土对陆稻根系生长发育的影响。
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