長中波天線 的英文怎麼說
中文拼音 [zhǎngzhōngbōtiānxiàn]
長中波天線
英文
long and medium wave antenna-
A new waveguide made of changing a wide wall of a rectangular waveguide to a uniform curved wall is called conformal waveguide. a kind of expression of approximate solution for domain mode of the new waveguide, including symmetric, unsymmetric arc, parabolic arch, hyperbolic arch, elliptic arch, etc., is constructed by using boundary condition of mental waveguide, variational method and boundary element method. by using the equivalence principle, an approximate calculating formula for equivalent resonant conductance of a narrow longitudinal halfwavelength slot cut in the curved wall of the unsymmetric arcrectangular waveguide is derived, and the result is shown. although this solution is approximate, it can solve the problem in designing the slotted antenna of such conformal waveguide
把矩形波導一個寬面外突成均勻曲面構成的新波導統稱為共形波導.利用金屬波導邊界條件、變分法、邊界元素法構造這種新波導中主模場的一種近似解表達式，包括曲面橫截線為對稱、非對稱圓弧，拋物線弧，雙曲線弧，橢圓弧等.然後根據等效原理，推導非對稱圓弧矩形波導曲面上窄的縱向半波長縫隙的等效諧振電導的近似計算公式，給出計算曲線.這種解雖然是近似的，但卻能解決這類共形波導縫隙天線的工程設計Interstellar hydrogen will emit a characteristic wave with wavelength 21cm. most of the sources of this wave are gas clouds in the spiral arms. second to the 21cm emission, the radio wave emitted by the molecular gas clouds in the arms are also good spiral arm tracers
在旋臂中的氫氣分子云，會發射出波長為21厘米的無線電波，只要探測這些無線電波在天空中的強度分佈，便可推算出旋臂的結構。Can build 2 - 3 ornamental breakwaters in a line west from hkcec, linked by ornamental pedestrian bridges to provide a promenade in the harbour, and to shelter an area for international dragon boating
可以由香港會議展覽中心以西興建2至3道美觀並連成一線的防波堤，並以美觀的行人天橋連接，以形成一道海中長廊及一個可供國際龍舟賽的平靜水域。The spot responder system which is the necessary part of ctcs is analyzed in the dissertation and three key technologies of the channel in the responder system are researched. firstly, a new kind of rectangular plate magnetic inductive loop antenna is designed to transmit the power frequency. researching the near field inter - inductive characters, the relationship among the inductive efficiency, the perimeter and the conductor width of the antenna is found out
本文在對ctcs中的點式應答器系統原理及組成進行分析和消化的基礎上，對系統中通道的幾個關鍵技術進行了詳盡的研究，主要分為三個方面: 1 ，提出並研製了新型的片式環形磁感應天線，並對傳輸能量載波的天線的近場互感特性進行了分析，得到互感效率隨天線的周長大小以及導帶寬度的變化規律，並通過計算機模擬和試驗對天線的近場波瓣圖進行了研究;通過分析寬帶匹配技術中的實頻法理論，設計了信號載波天線的寬帶匹配網路。When the atmosphere system occurs nonlinear instability in the subcritical instability region, it will split more wave resolutions than in the supercritical instability region and need more time to occur the subcritical instability, therefore it may have effect on the form and development of some synoptic system. 3. starting from nonlinear equations on the f - plane containing frictional dissipation under the boussinesq approximation
大氣系統在亞臨界不穩定區發生非線性不穩定時，會比超臨界不穩定區分裂出更多的波動解，而且發生亞臨界不穩定需要更長的時間，因此它可能在某些天氣系統的形成和發展過程中起到一定的作用。If the constant was different at the time when the light was absorbed or in the particular region of the universe where it happened, then the energy required to lift the electron would differ from that required today in laboratory experiments, and the wavelengths of the transitions seen in the spectra would differ
假如在光線被吸收時、或者在此事件發生在宇宙某特別區域中，值有別於今日，那麼讓電子躍遷所需的能量，就會與今天在實驗室中做出的實驗結果不同，在光譜中所看到電子躍遷的波長也會有所不同。Subsequently, the waves induced forces and their driven effects on currents are studied in detail. in the discussion of the effects of currents on waves, according to the wave radiation theory and the law of wave action conservation, the equivalence of none vorticity condition of the vector of wave number in constant wave field and fermat theory is testified. the dynamic and kinematics effects of background currents on waves are introduced concisely
在流對浪的作用討論中，依據波動的射線理論和由變分原理導出的波作用量守恆定律，闡明了穩定波場波數矢量的無旋條件與費馬原理的等價性，扼要討論了背景流場影響海浪的運動學效應和動力學效應，首次指出水位（包括天文潮位與風暴潮位）變化對海浪成長與消衰的影響，為流浪潮聯合數值模式的發展提供必要的理論依據。By comparing the absorption lines from a star to those obtained in a laboratory, we can tell whether the star is moving away or towards us and how fast the star is moving
只要比對恆星光譜中吸收線的波長和實驗室中同一物質的吸收線波長，我們便可以計算出天體究竟以甚麼速度遠離或接近我們。Fig. 3 integrated wind profiler and rass at sha lo wan. the rectangular antenna in the middle transmits and receives radio waves
中間的長方形天線作用是發放和接收無線電波，周邊的四個圓柱形擴音器則向空中發出聲波。Its size is small ( with an unit length of about 23. 7 % of the wavelength in the cover medium ), and its effectiveness is evident ( the patch antenna ' s directivity is increased by 3. 16db )
這種結構具有尺寸小（邊長僅為介質中波長的23 . 7 ） 、效果明顯（將貼片天線的方向性系數提高了3 . 16db ）的優點。During the ceremony, mr. c y lam, director of the hong kong observatory, recalled that the gathering of meteorological observational data from the mainland relied upon the reception of short wave radio broadcast by mtc colleagues. the morse code broadcasts were skillfully decoded into textual messages, and which were kept in good conditions
天文臺臺長林超英于會上憶述：從前接收中國內地氣象觀測數據，是依靠氣象電信中心同事細心收聽短波無線電廣播，把資料從摩斯電碼morse code一一編譯成文字報文，並完好的保存下來。分享友人