rectangular filter造句
例句與造句
- Rectangular filters fitting to the computer monitors have also been sold as accessories for this purpose.
- Lee, Tiffen, Formatt Hitech and Singh Ray also make square / rectangular filters in the 100 ?100 and Cokin P sizes.
- 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.
- 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.
- 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.
- It's difficult to find rectangular filter in a sentence. 用rectangular filter造句挺難的
- 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.
- 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.
- 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.