background radiation 中文意思是什麼

background radiation 解釋
背景輻射，本底輻射
  • background : n 1 後景，背景；基本情況；（紡織品等的）底子；出身；經歷。2 隱蔽的[不引人注目的]地位；幕後。3 襯...
  • radiation : n. 1. 發光，射光，放熱，放射，發射。2. 【物理學】輻射；放射物；輻射線[熱、能]；照射（作用）。3. 【動、植】輻射形；【測】射出測量法；【醫學】射線療法。
  1. They had found the cool afterglow of the big bang : the cosmic microwave background radiation

    他們發現的是大霹靂冷卻后的餘暉：宇宙微波背景輻射。
  2. Extragalactic background radiation

    河外背景輻射
  3. The unwanted radiation is referred to as background radiation.

    這種有害輔射稱為背景輔射。
  4. Topics include : planets, planet formation ; stars, the sun, " normal " stars, star formation ; stellar evolution, supernovae, compact objects ( white dwarfs, neutron stars, and black holes ), plusars, binary x - ray sources ; star clusters, globular and open clusters ; interstellar medium, gas, dust, magnetic fields, cosmic rays ; distance ladder ; galaxies, normal and active galaxies, jets ; gravitational lensing ; large scaling structure ; newtonian cosmology, dynamical expansion and thermal history of the universe ; cosmic microwave background radiation ; big - bang nucleosynthesis

    課程的主題包含了：行星、行星形成；恆星、太陽、正常的恆星、恆星形成；恆星演化、超新星、緻密天體（白矮星、中子星及黑洞） 、波霎、雙x -射線源；星團、球狀及疏散星團；星際介質、氣體、塵埃、磁場、宇宙射線；距離階梯；星系、正常及活躍星系、噴流；重力透鏡；大尺度結構；牛頓宇宙學、宇宙的動力膨脹及溫度發展歷史；宇宙背景微波輻射；大霹靂核合成。
  5. Background radiation intensity

    背景輻射強度
  6. For examples, observation of the gravitational lens phenomenon and the scattering phenomenon produced by microwave background radiation and hot plasmas from galaxies clusters

    ，例如利用引力透鏡現象及微波背景輻射與星系團的熱等離子體造成的散射現象等等。
  7. The study of infrared background radiation of earth and atmosphere by airborne ftir spectrometer

    地球大氣紅外背景輻射光譜特徵研究
  8. By carefully studying the polarity of the background radiation, scientists concluded that the first generation of stars in the universe first ignited to shine at only 200 million years after the big bang, much earlier than expected

    經過細心研究宇宙背景輻射的偏振情況，天文學家得出一個驚人的結論，原來第一代的恆星早於大爆炸后2億年已出現，遠早於早前的估計。
  9. Follow appropriate rules and regulation to establish standards and carry out monitoring activities around nuclear power plants as well as background radiation investigations

    二、依據相關法規訂定與執行核設施周圍環境輻射偵測及背景輻射調查。
  10. Yesterday s 22 apr average ambient gamma radiation dose rate taken outdoors in hong kong ranged from 0. 08 to 0. 14 microsievert per hour. these are within the normal range of fluctuation of the background radiation level in hong kong

    昨日4月22日在香港所錄得的平均戶外環境伽瑪輻射劑量率為每小時0 . 08至0 . 14微希沃特，此劑量率是在本港的本底輻射水平之正常變化范圍以內。
  11. Yesterday s 28 apr average ambient gamma radiation dose rate taken outdoors in hong kong ranged from 0. 08 to 0. 14 microsievert per hour. these are within the normal range of fluctuation of the background radiation level in hong kong

    昨日4月28日在香港所錄得的平均戶外環境伽瑪輻射劑量率為每小時0 . 08至0 . 14微希沃特，此劑量率是在本港的本底輻射水平之正常變化范圍以內。
  12. Abstract : the reflective characteristics of sea and sky background radiation, which have important effect on the infrared signature from flight vehicle above sea, are studied in the paper. the statistical distribution of wave facet directions is discussed, the effects of randomly riging and falling sea wave on the sea surface radiation and on the sun light reflection are also discussed. calculation methods of irradiance from sea surface radiation and reflected sun light on observation point are derived in the paper. finally a computation example is given, which shows the sea and sky background radiation has important effect on infrared characteristic especially in the front area of a flight vehicle

    文摘:研究了對近海飛行體的紅外特性有重要影響的海空背景輻射的反射特性.討論了波浪面起伏隨機規律，隨機起伏對海面自身輻射及對陽光反射的影響，推演了此種隨機起伏波浪面的自身輻射及反射的陽光在觀測點形成的輻照度的計算方法.給出的算例結果表明，海空背景對飛行體的紅外特性尤其對其前半球的紅外特性有重要的意義
  13. According to big bang theory, the early universe is a hot, dense and opaque fluid of electrons and protons. this hot plasma constantly emits, scatters and reabsorbs photons and is the source of the cosmic background radiation

    根據大爆炸理論，早期的宇宙主要由電子和質子組成，是一團高密度極端熾熱不透光的等離子體，它不斷放射散射和吸收光子，是宇宙背景輻射的源頭。
  14. For hot rolling steel production, the condition on site is poor, temperature measurement is restricted by transmitting rate, background radiation and transmission loss of optical route

    對現場條件比較惡劣的熱軋生產，它的測溫受到發射率、背景輻射、光路傳輸損失等因素的制約。
  15. The nobel prize in physics goes to john mather and george smoot " for their discovery of the blackbody form and anisotropy of the cosmic microwave background radiation

    2006年的諾貝爾物理學獎授予了美國科學家約翰?馬瑟和喬治?斯穆特，以表彰他們發現了宇宙微波背景輻射的黑體形式和各向異性。
  16. Smoot ' s group at lawrence berkeley national laboratory and the university of california at berkeley is observing our galaxy and the cosmic background radiation that is remnant from the fiery beginning of our universe

    斯莫特在勞倫斯伯克利國家實驗室的研究小組正在觀察太陽系以及宇宙背景放射，而這種射線被認為是宇宙大爆炸之後的存留物。
  17. Scientists used wilkinson microwave anisotropy probe wmap to capture the cosmic portrait that reveals the afterglow of the big bang, i. e. the cosmic microwave background radiation

    科學家利用威爾金森微波各向異性探測器wilkinson microwave anisotropy probe ， wmap ，測量來自不同方向的宇宙微波背景輻射，展示了大爆炸后的餘輝。
  18. Cosmic background radiation

    宇宙背景輻射
  19. This dissertation gives detailed study to this 4d solution, especially to the equivalent or induced 4d energy - momentum tensor of the solution. it is found that this 4d solution can be interpreted as to describe exterior fields of a spherically symmetric star immersed in a homogenous and isotropic cosmic background radiation

    本文對4維解，尤其是對該4維解所對應的einstein場方程中的能量-動量張量源，進行了詳細研究，發現它可以解釋為一個溫度不為零的球對稱星體的外部解。
  20. " for their discovery of cosmic microwave background radiation

    發現宇宙微波背景輻射
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