射電天文學 的英文怎麼說
中文拼音 [shèdiàntiānwénxué]
射電天文學
英文
astronomy, radio- 射 : Ⅰ動詞1 (用推力或彈力送出) shoot; fire 2 (液體受到壓力迅速擠出) discharge in a jet 3 (放出) ...
- 電 : Ⅰ名詞1 (有電荷存在和電荷變化的現象) electricity 2 (電報) telegram; cable Ⅱ動詞1 (觸電) give...
- 文 : Ⅰ名詞1 (字) character; script; writing 2 (文字) language 3 (文章) literary composition; wri...
- 學 : Ⅰ動詞1 (學習) study; learn 2 (模仿) imitate; mimic Ⅱ名詞1 (學問) learning; knowledge 2 (學...
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Radio astronomy today is armed with the largest antennas in the world.
射電天文學擁有世界上最大的天線。In modern radio astronomy, these radio celestial bodies are called " discrete sources ? cassiopeia a, cygnus a and taurus a are some examples of discrete sources. the letter " a " represents a strong radio source
在現代的射電天文學中,這些射電天體稱作分立射電源,例如仙后座a ,天鵝座a和金牛座a等, a是代表強的射電源。Above this 34 - m antenna, called dss - 13, is one of those large dishes of the deep space network in goldstone, california and is primarily used for receiving echoes reflected from asteroids when they are beamed by groundbased radio signals
圖上這座口徑34米的天線,編號dss - 13 ,隸屬美國加州的深空網路。當天文學家從地面向小行星發射無線電波時,小行星會把部分電波反射回地球,並由dss - 13所接收。Above ) this 34 - m antenna, called dss - 13, is one of those large dishes of the deep space network in goldstone, california and is primarily used for receiving echoes reflected from asteroids when they are beamed by groundbased radio signals
(圖上)這座口徑34米的天線,編號dss - 13 ,隸屬美國加州的深空網路。當天文學家從地面向小行星發射無線電波時,小行星會把部分電波反射回地球,並由dss - 13所接收。It was not until years later that the first all sky radio map was obtained by amateur astronomer grote reber, who had spent lots of effort in the measurement. he found that there was a fundamental difference
直到后來,經過一位業餘天文學家雷柏grote reber多年的努力和認真地做這方面的測量,才得到一幅全天的射電圖。Mixers are the key components of many microwave and millimeter - wave systems. the super - heterodyne receiver is always applied in modern communication system, mixer becomes the key component as is at the first part of system. but it is more and more difficult to get the choiceness lo source of the same band with the system is working at high frequency especially in the millimeter - wave. sub - harmonic mixer is a good solution to this problem now. in this circuit we need just half 、 quarter 、 even 1 / 8 of the rf signal frequency. in this paper the design and fabricate of sub - harmonic hmic mixers ( 2, 4 ) at w - band are introduced
混頻器是微波通信、射電天文學、雷達、等離子物理、遙控、遙感、電子對抗,以及許多微波測量系統中至關重要的部件。在現代通信系統中,毫米波頻段通常採用超外差接收機,混頻器作為第一級就成為關鍵部件。由於在毫米波頻段,同頻段高性能的本振源成本高,技術難度大,採用分諧波混頻技術是解決此問題的有效途徑,只需射頻頻率1 / 2 、 1 / 4甚至1 / 8的本振頻率即可實現混頻。Foremost among the techniques used to study dense interstellar region is molecular radio astronomy, a relatively new and rapidly developing interdisciplinary science.
在用來研究高密星際區域的技術中,最重要的是分子射電天文學;這是一門較新的發展迅速的邊緣科學。Two astronomers at the university of british columbia observed the subaru deep field heros with the submillimetre scuba camera at the james clerk maxwell telescope a 15 metre aperture radio telescope, also on mauna kea
加拿大英屬哥倫比亞大學兩位天文學家,亦利用同樣位於莫納克亞山上的麥克斯偉望遠鏡james clerk maxwell telescope ,口徑15米的亞毫米波段射電望遠鏡,對從sdf中所發現的四個hero進行觀測。Radio astronomers are now able to synthesize the response of a partially filled aperture of large diameter and thus to map variations in nebular brightness.
射電天文學家現在已經能夠把部分充滿的大直徑孔徑進行綜合,從而描繪出星雲亮度變化圖。In none of these respects does optical astronomy have any advantage over radio astronomy.
在所有這些指標上,射電天文並不比光學天文遜色。Sub - arcsec radio astronomy
亞角秒射電天文學The technique has been highly successful in radio astronomy, and in both satellite and aircraft borne radar
該技術在射電天文學、衛星雷達和機載雷達上均獲得了巨大成功。For instance, radio astronomy allows observations of cosmic microwave radiation, thus offering a way of detecting the edge of the universe
例如,電波天文學提供了宇宙微波輻射的觀察,而能夠探測宇宙之邊緣。We are used to calling an instrument of this kind in optics a telescope, and the radioastronomical counterparts are therefore briefly named "radio telescope".
在光學上我們通常稱這種類型的儀器叫望遠鏡,因而射電天文學上的對應物簡稱為「射電望遠鏡」。In hong kong, it is becoming difficult to find a starry night. radio astronomy may be helpful in overcoming this difficulty since radio telescopes are usable at all times and at any weather conditions
在香港,天文愛好者想找一個繁星點點的晚上已經不容易,然而射電天文學可突破這個障礙,因為射電天文望遠鏡可以全天候,不分晝夜運作。However, radio telescopes do have their own shortcoming. firstly, radio astronomical images are not as fascinating as optical images. moreover, they do not work like optical telescopes which can receive all visible wavelengths and then produce monochromatic signals by means of filters
可是,射電天文望遠鏡也有它的缺點,首先射電天文圖像並沒有光學照片那麼具美感,而且它不像光學望遠鏡般,可以把可見光全部接收,然後加上濾色片分出單色光。Why can radio astronomers observe during the day, whereas optical astronomers are ( for the most part ) limited to nighttime observing
譯文:為什麼射電天文學家可以在白天觀測,而光學天文學家的絕大多數觀測只能在夜晚進行Furthermore the " microflare theory " tried to discuss and find the elementary flares in small space and time scale which might form and trigger the whole solar flare. the detection of radio fine structures showed many observational evidences of " microflare ". the observations and theoretical researches on radio fine structure have been developed fast recently and played an important role in solar radio astrophysics
著名的「微耀斑理論」 ,試圖從較小的時間、空間尺度范圍探究太陽耀斑形成和觸發的基本單元,而射電精細結構是微耀斑理論的重要觀測基礎,對射電精細結構的觀測和理論研究已成為太陽射電天文學中快速發展的領域,對揭示太陽活動源區的物理本質具有重要的意義。We are used to calling an instrument of this kind in optics a telescope, and the radioastronomical counterparts are therefore briefly named " radio telescope "
在光學上我們通常稱這種類型的儀器叫望遠鏡,因而射電天文學上的對應物簡稱為「射電望遠鏡」 。In china, the chinese academy of sciences is supporting a new project called " pre - research on five hundred meter aperture spherical telescope fast
現時中國科學院在射電天文學這范疇中正重點支持一個名為500米口徑射電望遠鏡預研的項目,這望遠鏡的英文簡稱為fast five hundred meter aperture spherical telescope分享友人