two-dimensional spectrum [分化] 二维谱
three dimensional spectrum 三维频谱空间
three-dimensional spectrum 三维空间频谱
-dimensional spectrum analysis 二维频谱分析
After the simulation of the well surrounded by two and three stratums, the two-dimensional spectrum is calculated while the curve of wave slowness changes with the frequency is drawn.
分别计算了井外有两层、三层介质时井内声波传播的二维谱，绘制了时差随频率的变化曲线。
Three-dimensional fluorescence spectrum and ultraviolet absorption spectrum of Bletilla striata extraction drawn by boiling water were reported.
报道了白芨沸水浸取液的三维荧光光谱和紫外吸收光谱。
According to the correlation of TV image, the structure and characteristic of three dimensional spectrum in PAL TV signals is mathematically analyzed.
根据电视图像的相关特性，对PAL信号的三维谱结构及其特征进行了数学分析。
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