英文字典中文字典


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       







请输入英文单字,中文词皆可:



安装中文字典英文字典查询工具!


中文字典英文字典工具:
选择颜色:
输入中英文单字

































































英文字典中文字典相关资料:


  • Calculate Vehicle License Fees - California DMV
    The VLF is the portion of your registration fee that is tax deductible The VLF calculator for tax purposes may assist you in determining the VLF paid in a specific tax year Learn more about VLF
  • Very low frequency - Wikipedia
    Very low frequency or VLF is the ITU designation [1] [2] for radio frequencies (RF) in the range of 3–30 kHz, corresponding to wavelengths from 100 to 10 km, respectively The band is also known as the myriameter band or myriameter wave as the wavelengths range from one to ten myriameters (an obsolete metric unit equal to 10 kilometers)
  • 甚低频 - 百度百科
    甚低频 (VLF, Very low frequency)是指 频带 由3KHz到30 KHz的 无线电波 。VLF多数用作 潜艇 通讯、 无线心跳频率检测器 及地球物理学研究等。另外对于 雪崩 时的人命及财产搜索,VLF亦起了一定的作用。 [1]
  • 甚低频 - 维基百科,自由的百科全书
    甚低頻(英語: VLF, Very Low Frequency ) [1] 是指由國際電信聯盟定義的頻帶由3KHz到30KHz的無線電波。 [2] 其波長為100公里到10公里,因此又稱為萬米波( myriameter wave )。 萬米波由於其帶寬有限,比較難以傳播語音信號,並且只能使用低數據速率 編碼系統。
  • WALDO – Worldwide Archive of Low-frequency Data and Observations
    Here we are building the world’s largest repository of publicly available ELF VLF LF radio data, which is used to study the physics of lightning, the ionosphere, and the magnetosphere The mission of WALDO World is to collect, curate and deliver ELF VLF LF radio data for scientific use for open public use
  • Very Low Frequency Electromagnetic (VLF) | US EPA
    The very low frequency electromagnetic (VLF-EM) method is a passive electromagnetic (EM) method that exploits the EM radiation emitted by preexisting radio transmitters Such structures are located around the globe and used by the military for navigation and communication
  • VLF Receiver Front-End - Stanford University
    VLF Receiver Front-End Introduction Stanford VLF research is primarily interested in signals with frequencies in the range of 300Hz to 30kHz This spectrum includes man-made navigation signals, as well as natural phenomenon such as sferics and whistlers, which are generated by lightning
  • Introduction to VLF – Stanford VLF Group - KU
    What is ELF VLF Research? ELF VLF stands for Extremely Low Frequency and Very Low Frequency, and refers to the range 300 Hz to 30 kHz We’re talking about radio waves, like the AM FM signals you get, just at an even lower frequency
  • 心脏vlf是什么意思? - 百度知道
    心脏vlf是指心电图上的非常低频振荡。 这种振荡一般是指0 003-0 04Hz的频率范围内的信号。 很多专家认为,心脏VLF可以反映出人体内部的压力反应,特别是在一些紧张、焦虑、或是恐惧的情境下。
  • 3. 075 Vehicle License Fee (VLF) (CR TC §§10751-10753) - California DMV
    The VLF class is established when the vehicle is sold new or first registered in California and is usually changed when a vehicle is transferred or modified as to require reclassification The assigned VLF class and the year first sold or asterisk year (*YR), if present, is used to determine the VLF Note The year model is never used to





中文字典-英文字典  2005-2009