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：

Radar    音标拼音: [r'ed,ɑr]
n. 雷达,电波探测器

雷达,电波探测器

radar
雷达

radar
n 1: measuring instrument in which the echo of a pulse of
microwave radiation is used to detect and locate distant
objects [synonym: {radar}, {microwave radar}, {radio detection
and ranging}, {radiolocation}]

radar \ra"dar\ (r[=a]"d[aum]r), n. [acronym from RAdio Detection
And Ranging.]
1. An electronic device designed to detect objects at a
distance, and determine their distance from the device, by
transmitting a pulse of radio waves and measuring the time
required for the echo of the pulse to return to the
emitting device; as, the radar showed a plane approaching
rapidly. For more information of radar, see the article
What is Radar?. [acronym]
[PJC]

2. The method of detecting objects, finding their distance,
or determining their speed, by use of a radar[1] device;
as, modern radar can detect objects as small as raindrops.
[PJC]

92 Moby Thesaurus words for "radar":
AA radar, AFC, AFC mixer, CRT, CW oscillator, MAD radar, Navaglobe,
Oboe, TR switch, TR unit, VAR, Volscan, altimeter, amplifier,
analyzer, astronavigation, automatic electronic navigation,
automation, avionics, cascade screen, cathode-ray tube,
celestial navigation, chronometer, coastwise navigation, consolan,
dead reckoning, demodulator, detector, discriminator,
early-warning radar, electron microscopy, electron optics,
electron physics, electronic engineering, electronic navigation,
electronics, electrophysics, fix, frequency meter,
gun-directing radar, hard-tube pulser, indicator,
interception radar, limiter, line of position, local oscillator,
long-range radar, loran, magnetron, microwave mixer, mixer,
modulator, navar, navigation, network pulser,
omnidirectional range, omnirange, oscillator, overlapping,
panoramic radar, photoelectricity, pilotage, plane sailing,
point-to-point navigation, potentiometer, pulse generator,
radar telescope, radio, radio beacon, radio navigation, radionics,
range-sweep amplifier, range-sweep generator, receiver, screen,
second detector, sextant, shoran, sofar, sonar,
square-wave generator, synchronizer, tables, tacan, teleran,
television, timing unit, tracker, transistor physics, transmitter,
trigatron, visual-aural range

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:


  • Radar - Wikipedia
    Radar is a system that uses radio waves to determine the distance (ranging), direction (azimuth and elevation angles), and radial velocity of objects relative to the site It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations and terrain
  • Weather radar - Wikipedia
    Weather radar in Norman, Oklahoma with rainshaft Weather (WF44) radar dish University of Oklahoma OU-PRIME C-band, polarimetric, weather radar during construction A weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, and estimate its type (rain, snow, hail etc ) Modern weather radars are
  • List of radar types - Wikipedia
    This radar uses radio waves along with horizontal, dual (horizontal and vertical), or circular polarization The frequency selection of weather radar is a performance compromise between precipitation reflectivity and attenuation due to atmospheric water vapor
  • History of radar - Wikipedia
    True radar which provided directional and ranging information, such as the British Chain Home early warning system, was developed over the next two decades The development of systems able to produce short pulses of radio energy was the key advance that allowed modern radar systems to come into existence
  • Active electronically scanned array - Wikipedia
    The Eurofighter Typhoon combat aircraft with its nose fairing removed, revealing its Euroradar CAPTOR AESA radar antenna An active electronically scanned array (AESA) is a type of phased array antenna, which is a computer-controlled antenna array in which the beam of radio waves can be electronically steered to point in different directions without moving the antenna [1] In the AESA, each
  • Radar signal characteristics - Wikipedia
    A radar system uses a radio-frequency electromagnetic signal reflected from a target to determine information about that target In any radar system, the signal transmitted and received will exhibit many of the characteristics described below
  • List of radars - Wikipedia
    A radar is an electronic system used to determine and detect the range of target and maps various types of targets This is a list of radars
  • Radar engineering - Wikipedia
    Radar engineering is the design of technical aspects pertaining to the components of a radar and their ability to detect the return energy from moving scatterers — determining an object's position or obstruction in the environment [1][2][3] This includes field of view in terms of solid angle and maximum unambiguous range and velocity, as well as angular, range and velocity resolution Radar
  • Category:Radar - Wikipedia
    Pages in category "Radar" The following 151 pages are in this category, out of 151 total This list may not reflect recent changes





中文字典-英文字典  2005-2009