“Nyquist frequency”的概念、定义、翻译、参考文献-科学参考

Nyquist frequency

Statistics

The shortest detectable frequency in a time series. All time series are, in practice, recorded at discrete time points (for example, one reading per second). Periodic variations that happen more rapidly than the shortest time interval cannot be detected. With time intervals of size t the Nyquist frequency is t⁻¹ cycles per unit time.

Geology and Earth Sciences

A frequency which is half of the sampling frequency. The Nyquist interval is the frequency range from zero to f_N, where f_N = 1(2Δ‎t) and Δ‎t is the sampling interval. For example, if the sampling interval Δ‎t is 2 ms (i.e. a sampling frequency of 500 Hz), then f_N = 1(2 × 0.002) = 250 Hz. It is important to know the value of the Nyquist frequency, as frequencies greater than f_N will alias (or ‘fold back’) and appear as lower frequencies from which they cannot be distinguished.

单词	Nyquist frequency
释义	Nyquist frequency Statistics The shortest detectable frequency in a time series. All time series are, in practice, recorded at discrete time points (for example, one reading per second). Periodic variations that happen more rapidly than the shortest time interval cannot be detected. With time intervals of size t the Nyquist frequency is t⁻¹ cycles per unit time. Geology and Earth Sciences A frequency which is half of the sampling frequency. The Nyquist interval is the frequency range from zero to f_N, where f_N = 1(2Δ‎t) and Δ‎t is the sampling interval. For example, if the sampling interval Δ‎t is 2 ms (i.e. a sampling frequency of 500 Hz), then f_N = 1(2 × 0.002) = 250 Hz. It is important to know the value of the Nyquist frequency, as frequencies greater than f_N will alias (or ‘fold back’) and appear as lower frequencies from which they cannot be distinguished.
随便看	warning line Warnock’s algorithm War of 1812 (1812–15) war on terrorism WARP warping warrant warranted assertibility warranted growth rate warranty Warren, Earl (1891–1974) Warsaw Pact Warsaw Uprising Warshall’s algorithm Wars of Religion, French wart hog Warwick, Richard Neville, Earl of (1428–71) Wasatchian Washakie (1804–1900) washback wash board moraine washboard moraine washings washing soda Washington, Booker T. (1856–1915)