vlf 中文意思是什麼

vlf 解釋
vlf ＝ very low frequency 【無線電】甚低頻。

  1. The vlf / hf by using ar presents trend of increasing, this is tallied with clinic. analyzing 5 minute hrv ( decubitus ) for 4 myocardial ifchemia sickness by using ar and fft

    現代譜估計所得的vlf / hf比值隨年齡（ 20歲）增加基本呈現增加的趨勢，與臨床認識吻合。
  2. Methods of measurement of electrical performance for lf vlf transmiters

    低頻甚低頻發射機電性能測量方法
  3. Vlf radio navigation system

    甚低頻無線電導航系統
  4. Application of vlf - em method in mineral exploration of longtoushan ag - pb - zn deposit

    甚低頻電磁法在龍頭山多金屬礦床勘查中應用
  5. Out in the no - mans land of the international waters are the only means of communication with the submarines, to use radio in the vlf or elf range

    在茫茫大洋深處，唯一可用的通信手段就是甚低頻或者極低頻無線電。
  6. Abstract : the vlf through - the - earth communication system is recognized as the most reliable way of conveying dispatching information due to its special transmission media

    文摘:由於大地通道穩定，低頻透地通信被認為是最可靠的救急通信方式。
  7. It is infered signal length is short, the spectrum resolving power is low by using fft method, so the vlf % and lf % by using 2 method has great difference

    推測由於5分鐘hrv信號點數較少， fft分析時解析度不高，因此兩種方法所得極低頻vlf和低頻lf有較大差異。
  8. This system employed a new concept for measuring upper winds, viz. use of vlf very low frequency in the range of 10 - 13 khz signals from a global navigational network, omega, for computing the wind

    與以往無線電相比，該系統在測風方面則採用了一種新的概念，利用世界性奧米茄導航站網的甚低頻信號10 - 13khz來計算出高空風向和風速，無需用雷達追蹤探空儀位置。
  9. Measurement of pressure, temperature and humidity operated in much the same principle as the older version of radiosonde, but computation of wind was made use of the vlf ( very low frequency in the range of 10 - 13 khz ) signals of a world - wide navigational network, omega

    該系統量度高空氣壓、氣溫及濕度的方法與舊式無線電探空儀大致相同，但在測風方面則採用了一種新的概念，利用世界性奧米茄導航站網的甚低頻信號（ 10 - 13khz ）來計算出高空風向和風速，無需用雷達追蹤探空儀位置。
  10. For few domestic and international studies of the radio propagation in the overburden of the earth ' s crust, this paper theoretically stresses the propagation problem of low frequency radio wave, including slf wave and vlf wave, in the medium and briefly introduces the theory of scale model testing method

    針對國內外有關電波在地殼覆蓋層中傳播研究工作的空白，本文主要從理論上討論低頻（包括特低頻和甚低頻）無線電波在該種介質中的傳播問題，並簡要介紹縮比模型測量理論。
  11. We found that vlf / lf of hyper thyroibism sickness by using the 2 methods in are high than healthy person. study hrv wd, when using choi - williams window to restrain cross disturb, setting filter parameter a = 0. 05

    本文還對心率變異信號的維格納分佈作了研究，選用choi - williams窗，確定了濾波函數的參數= 0 . 05 ，實際證明抑制交叉項的干擾效果較好。
  12. In the middle of the atlantic ocean, with a salinity of 3. 2 %, a vlf signal will penetrate down to a depth of 10 - 20 meter, barely periscope - depth for a modern large scale submarine

    在大西洋中部，海水的鹽度為3 . 2 % ，甚低頻無線電信號可以穿透到海面下10 ~ 20米的深度，幾乎就是現代大型潛艇的潛望鏡深度。
分享友人
分享到 Line

分享到臉書