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rectangular filter造句

"rectangular filter"是什么意思   

例句與造句

  1. Rectangular filters fitting to the computer monitors have also been sold as accessories for this purpose.
  2. Lee, Tiffen, Formatt Hitech and Singh Ray also make square / rectangular filters in the 100 ?100 and Cokin  P sizes.
  3. Real-time filters can only approximate this ideal, since an ideal sinc filter ( a . k . a . " rectangular filter " ) is sampling theorem and the Whittaker Shannon interpolation formula.
  4. Most of Cokin's filters are made of optical resins such as CR-39 . A few round filter elements may be attached to the square / rectangular filter holders, usually polarizers and gradient filters which both need to be rotated and are more expensive to manufacture.
  5. Notably, the frequency response of the rectangular filter is the sinc function ( the rectangular function and the sinc function are Fourier dual to each other ), and thus truncation of a filter in the time domain corresponds to multiplication by the rectangular filter, thus convolution by the sinc filter in the frequency domain, causing ripple.
  6. It's difficult to find rectangular filter in a sentence. 用rectangular filter造句挺難的
  7. Notably, the frequency response of the rectangular filter is the sinc function ( the rectangular function and the sinc function are Fourier dual to each other ), and thus truncation of a filter in the time domain corresponds to multiplication by the rectangular filter, thus convolution by the sinc filter in the frequency domain, causing ripple.
  8. It is usually expressed as an equivalent bandwidth, B . It can be thought of as redistributing the DTFT into a rectangular shape with height equal to the spectral maximum and width B . Mathematically, the noise equivalent bandwidth of transfer function " H " is the bandwidth of an ideal rectangular filter with the same peak gain as " H " that would pass the same power with white noise input.
  9. In particular, truncating the sinc function itself yields \ mathrm { rect } ( t ) \ cdot \ mathrm { sinc } ( t ) in the time domain, and \ mathrm { sinc } ( t ) * \ mathrm { rect } ( t ) in the frequency domain, so just as low-pass filtering ( truncating in the frequency domain ) causes " ringing " in the time domain, truncating in the time domain ( windowing by a rectangular filter ) causes " ripple " in the frequency domain.

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