radiation background 中文意思是什麼

radiation background 解釋
本底輻射
  • 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。
  • 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...
  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. Background information on uv radiation uv index

    紫外線及紫外線指數基本資料
  5. 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。
  6. The use of interferometer to detect and analyze laser radiation is well known, but when the intense ratio of the laser radiation to the background natural light radiation is too small, the laser radiation cannot be detected. a novel more sensitive method for detect of wideband weak incident laser in strong background noise is introduced in this paper. the optical unit uses two wedge interferometers and two line array detectors. the incoming light radiation is divided into two beams and through the interferometers

    在被動激光偵察告警中，對微弱脈沖激光信號的探測是一個難點。當探測距離相當遠或視場內接收的背景光輻射很強時，脈沖激光信號到達探測器的能量很小，會淹沒在強大的背景光信號中而探測不到。本論文提出了一種探測微弱脈沖激光信號的方法，可對強烈背景光中的激光威脅信號進行探測和告警，並給出其波長參數。
  7. 3 for example, if ambient gamma radiation is the only factor contributing to the radiation dose to a person, this dose of 5000 microsieverts may be reached when the ambient gamma dose rate is 1000 microsieverts per hour more than 3000 times above background and lasts for 5 hours ; or when the dose rate is 200 microsieverts per hour more than 600 times above background and lasts for 25 hours

    3 .例如，假若環境伽瑪劑量率持續高達每小時1000微希沃特超過本底值3000倍，則在5小時內，因為環境伽瑪輻射所引致的總劑量便可能達到上述的5000微希沃特。若環境伽瑪劑量率每小時200微希沃特超過本底值600倍，則個人須持續受此輻射影響25小時，所受的總劑量方可達到上述5000微希沃特。
  8. Background radiation intensity

    背景輻射強度
  9. It introduces the method of modulated light subtracting infrared radiation of atmosphere and background as well as the method of phase - lock - loop detecting feebleness signal

    採用光路差分調制的方法實時扣除背景紅外輻射，並採用鎖定放大器進行微弱信號的檢測。
  10. A program was set up using visual basic 6. 0. the results show that the visible fruits under direct sunlight or backlighting condition were identified with an accuracy of 100 %, however, intense background sunlight will cause poor fruit illumination and poor segme ntation results. it is widely known that there is thermal radiation difference between citrus and leaves

    分別在順光條件和背光條件下進行了試驗分析，結果表明該識別模型可以實現對樹上可見的柑桔的識別，並適用於單個和多個果實的識別，識別率為100 ，但在順光條件下，當背景（雜草）反射光較強時，則存在混淆區域。
  11. 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。
  12. The results show that a warm high ridge at the middle level and transformed surface cold high over the plain provide a good background condition ; a cooling process produced by net surface radiation fluxes is the trigger and strengthening mechanism for the fog event ; the subsidence flow at the middle and low tropospheric levels is favorable for the setting - up and maintenance of stable stratification at the boundary layer and weak wind condition at the ground layer over the fog region ; the transportation of weak warm advection at lower levels and weak lift motion at the boundary layer play a very important role to the long maintenance of the fog event ; the intrusion of north wind accompanied by cold advection is a main dynamic factor of the fog dissipation

    結果表明：在中高層暖性高壓脊及地面變性冷高壓穩定維持的大尺度背景條件下，地表凈輻射引起的近地層冷卻是大霧過程的觸發和加強機制；中低空下沉氣流的存在有助於近地層的弱風條件和穩定層結的建立；低層暖平流的輸入和邊界層的淺層抬升是大霧長時間持續的原因；伴隨冷空氣南下的偏北大風是驅使大霧消散的動力因子。
  13. From the location and the economic strength and the technical strength and the natural resource and the foundation and the urbanization - level and the industrial structure and the land management and the administrative coordination, etc. the paper analyzes the area background and researches the advantageous and the disadvantageous conditions, then based on the analysis, the paper analyzes the formed mechanism of the city - space integration, further, from the angel of policy mechanism and the investment mechanism and the radiation mechanism the accumulation mechanism, etc. part iv : the present situational analysis of cities and towns " system and the level forecast of its integration

    這一部分對長株潭的區域背景分析是從區位、經濟實力、科技實力、自然資源、基礎設施、生態環境、城市化水平、產業結構、土地管理、行政組織協調等方面來分析長株潭城市一體化的有利和不利條件，並在此基礎上從政策機制、投資機制、輻射機制、積聚機制等方面分析了長株潭一體化的形成機制。第四部分：長株潭城鎮體系現狀分析及其一體化水平預測。
  14. 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
  15. 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。
  16. 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。
  17. 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。
  18. 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。
  19. 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
  20. Theory therefore indicates that the dark ages were defined by three distinct temperatures : the spin temperature ( a measure of the relative abundance of atoms with different spin states ) ; the ordinary, kinetic temperature ( a measure of the motions of the atoms ) ; and the radiation temperature ( a measure of the energy of the background photons )

    因此理論上，黑暗年代是由三種截然不同的溫度來定義：自旋溫度（不同自旋狀態原子相對數目的度量） 、一般的動力溫度（原子運動的度量）與輻射溫度（背景光子能量的度量） 。
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