...当下市面上的全波段(World Band)数调短波收音机调谐的频率跨度很大,典型的调谐范围从150KHz到30000KHz,几乎囊括长波、中波、短波的全部波段。
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诺布尔温尼有一台非常好的全波段收音机。
即使有朝一日证明可以制造出在全波段都完全隐形的飞机,还会有一个更深一步的问题。
Even if it ultimately proved possible to make an aeroplane completely invisible at all wavelengths, there would be a further problem.
波段选择也属于变量选择,它是用选出来的波段代替全波段建模从而改善模型的性能。
Wavelength selection methods are variable selection techniques that allow calibration models to be constructed with a subset of spectral points instead of with the whole spectrum.
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