extreme-low frequency 中文意思是什麼

extreme-low frequency 解釋
極低頻
  • extreme : adj 1 極端的;過激的 (opp moderate)。2 極限的,非常的。3 盡頭的,末端的。4 〈古語〉最後的,臨終...
  • low : adj 1 低的;淺的,矮的。 low flight 低飛。 a low temperature 低溫。 low tide [water] 低潮。 The g...
  • frequency : n. 1. 屢次,頻仍,頻繁。2. (脈搏等的)次數,出現率;頻度;【物理學】頻率,周率。
  1. Assessment of extreme low frequency magnetic field from some domestic instruments

    幾種常用電器的極低頻磁場水平的分析
  2. Since the energy of 18 - information track signal is concentrated around upper frequency and lower frequency, the frequency of the modulation signal is low, and it must have high resolution, we use zfft to detect it. as the energy of um - 71 signal is more concentrated, we use extreme value method to detect the frequency of modulation signal in frequency domain, which can satisfy the frequency resolution

    針對18信息軌道信號能量集中在上、下邊頻附近且低頻信息頻率低的情況,提出了用zoom - fft ( zoom指頻率擴展或細化,簡稱zfft )演算法進行信號的局部放大檢測低頻信息,以提高信號的頻率解析度,而um - 71軌道信號能量集中在載頻附近,在頻域上採用極值法檢測低頻信息,即可滿足信號頻率解析度的要求。
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