波道間距 的英文怎麼說

中文拼音 [dàojiān]
波道間距 英文
channel separation
  • : Ⅰ名詞1 (波浪) wave 2 [物理學] (振動傳播的過程) wave 3 (意外變化) an unexpected turn of even...
  • : Ⅰ名詞(道路) road; way; route; path 2 (水流通過的途徑) channel; course 3 (方向; 方法; 道理) ...
  • : 間Ⅰ名詞1 (中間) between; among 2 (一定的空間或時間里) with a definite time or space 3 (一間...
  • : Ⅰ名詞1 (距離) distance 2 (雄雞、雉等的腿的後面突出像腳趾的部分) spur (of a cock etc )Ⅱ動詞...
  • 間距 : interval; separation; spacing; espacement; space; spacing; space length; range; unpack; step
  1. Generally, the designed channel spacing of itu - t standard in wdm systems is from 0. 8nm to 1. 6nm, which is much larger than the spacing required by actual communication bandwidth. for example in lightwave transmission systems, a sghz channel occupies only 0. 04nm at the wavelength band of 1. 55 n m. thus, most of the bandwidth in the actual transmission systems may be wasted

    Itu - t標準中wdm系統設計的通為0 . 8nm - 1 . 6nm ,這遠遠大於實際使用的通帶寬,例如一個帶寬為5ghz的通在1 . 55 m段只佔據了約0 . 04nm的長范圍,因而導致大部分的帶寬被浪費。
  2. Data used in this work are north pacific ssta, 160 stations precipitation of china, and ncep reanalysis data. main results are as follow : ( 1 ) it is found that a apparent transition of north pacific ssta in later 1970 ' s : eastern and middle - equatorial pacific ssta turns from cold to warm with area extending, and mid - latitude pacific ( west wind drift zone ) turns from warm to cold. during this transition of ssta, different characters also appear in el nino and la nina : before 1976, la nina happens more frequently, and its duration is longer, el nino zone develops from negative ssta in the early stage ; after 1976, el nino happens a little bit frequent and longer with more intensity than before, el nino zone develops from positive ssta in the early stage ; the course of ssta variation has an enso cycle of 2 - 6 years, annual oscillation of 8 - 9 years, and decadal variation of about 22 years

    本文採用1950 - 1999年北太平洋海表溫度( sst ) 、中國160站夏季降水和ncep再分析的歐亞500hpa高度場等資料,利用eof 、 svd 、小分析、合成分析和相關分析等方法,在分析北太平洋海溫時空分佈特徵的基礎上,著重探討了海溫異常及其年代際變化對我國東部降水的影響,並對降水、高度場和海溫三者之的關系進行了分析,以試圖尋找三者異常之可能的聯系,主要結論如下: ( 1 ) 1976年前後,北太平洋海溫經歷了一次明顯的轉變,赤中、東太平洋厄爾尼諾海區由冷轉暖,暖水范圍增大,中緯度西風漂流區海溫由暖轉冷;在這樣的年代際背景下,厄爾尼諾、拉尼娜事件在不同的時期也有不同的特徵:在76年前,拉尼娜事件發生頻率高,持續時長,事件起始於負海溫平;而76年後,則是厄爾尼諾事件發生頻率略高,持續時長,強度增大,事件起始於正海溫平。
  3. The tracks are separated by approximately three times the wavelength of green light

    離約相當於3倍的綠色光的長。
  4. The research results are controlled source which has linear or nonlinear variabe frequency scan function and the seismic instruments which match with it, and the method of small group intervals, small offset, much more channels, short array length, high - frequency receivers are applied during the link of data acquisition, and that the techniques of the refraction static correction, the noise suppressing, the high - resolution velocity analysis, the wavelet length compression, the wavelet zero - phase, and the prestack migration should be applied emphasizedly during the link of data processing and interpretation

    研究表明,對于城市活斷層的抗干擾高解析度淺層地震勘探,在數據採集環節應採用具有線性或非線性變頻掃描功能的可控震源和與其相匹配的地震儀器,以及小、小偏移、多接收、短排列和高頻檢器接收的工作方法;在數據處理與解釋環節,要重視折射靜校正技術、噪聲壓制技術、高精度速度分析技術、子壓縮技術、子零相位化技術和疊前偏移技術等的應用。
  5. At noon the spaces between the sensors will hide fluctuations that the computer will not know about, tiny deviations from the average

    正午時分,傳感器之離會掩蓋計算機無法知動、任何偏平均值的變化。
  6. Boston ( reuters ) - an american astronaut became the first person to run the boston marathon in space on monday, completing the 26. 2 miles on a treadmill in the orbiting international space station

    士頓(路透社) ? ?星期一,一位美國宇航員成為在太空參加士頓馬拉松比賽的第一人。她在沿軌運行的空站跑步機上完成了6 . 2英里的離。
  7. Under the effect of instantaneous blasting shock wave, the reliability of lining is affected. the influence on existing tunnel relates to amount of dynamite, tunnel space, area of vvok face and rigidity of round rock

    在爆破沖擊的瞬作用下,既有隧襯砌安全性將受到影響,裝藥量、隧、開挖面面積、圍巖軟硬程度都與爆破沖擊對既有隧的影響有關。
  8. From a demand for further amount of aggregate transmission capacity, not only expanding an available wavelength range but also cramming frequency - spacing have been investigated

    考慮到將來信息傳輸容量的急劇增長,因此不僅要拓寬可復用的長范圍,而且通也需進一步降低。
  9. The paper introduces the principle of transient rayleigh wave exploration and the calculating process of f - k region analysis, according to experimental data analyzes the influences of the parameters on the calculation of phase speed of rayleigh wave and the various factors affecting transient state rayleigh wave exploration, at last, gives some advices on how to choose the best sampling rate, group interval, offset, vibrating source and receiver

    介紹了瑞雷勘探的原理和f - k域分析法的計算過程,分析了各參數對瑞雷相速度計算的影響,通過實驗數據分析了影響瑞雷勘探的主要因素,就如何選擇最佳采樣率、、偏移、震源以及檢器等提出了幾點建議。
  10. Over - the - horizon radar ’ s beam - frequency is high frequency band and its wavelength is so long that the annate ’ s characters are very complicated when applicated on the ship. the character of coupling between cells and the environment must be measured to compensate in the radar signal process step. the ship - based over - the - horizon radar uses cfa ( crossed field antenna ) as array antennas ’ cell

    艦載超視雷達使用高頻信號作為發射頻率,其長較長,在艦船有限的空內,陣列天線的陣元之的耦合與陣元與背景之耦合都十分嚴重,必須測量陣列天線通的幅相一致性,作為雷達信號處理的補償參數。
  11. Conventional detector ( single - user matched filter ) distinguishes each user by the crosscorrelation of their spread - spectrum codes. in practice, however, its performance is much deteriorated due to the existence of noise in channel and strong multi - access interference, i. e. near for effect. a new method using independent component analysis is proposed in this paper. the - received energy of signals is controlled effectively, thus the near - far effect is overcome as much as possible ; moreover, the effect that noise imposed on the detector is mostly reduced. simulations verify the effectiveness of this method

    傳統檢測器(單用戶匹配濾)利用擴頻碼之的互相關特性來區分各用戶信號.而在實際應用中,通噪聲和近離用戶對遠離用戶的強多址干擾即遠近效應,使得接收機的性能受到很大影響.本文將獨立分量分析法引入傳統接收機,有效控制接收信號的能量,從而極大地提高了接收機的抗遠近性能,同時噪聲的影響被盡可能消除.模擬結果表明了該方法的有效性和可行性
  12. Before placing them, she said, we should first wet the soil beneath until it is muddy, then fit the grass patches alongside each other as in a jigsaw puzzle, leaving little space between to encourage smooth growth. leaving too much or too little space would not be good for the grass development, and so we should follow the " middle way. " after that, we sprinkled some soil on top, and sprayed it with water to keep it wet

    師父教我們,草不必剪成四方小塊,反而要輕柔的將草分開成浪型,底下的泥土先用水弄成濕濕的泥漿,再把草像拼圖一樣拼在一起,草跟草之要留些微的離,這樣長出新草時才不會突起,也不可離太遠,就是要持中庸之,然後再灑些泥土在上面,澆一些水讓它潤濕,還要記得天天澆水才行。
  13. Case 1 : when there is no relative measurement, each satellite uses its own on - board attitude sensors to determine its attitude, and exchange the information through the communication link between formation satellites, and then the relative attitude is determined through simple mathematical operation. case 2 : based on the range measurements of gps like sensors, using two - point measurement of the relative orbit state to establish relative orbit and attitude kinematics and measuring equations. and state estimation is achieved through the extended kalman filter technology and unscented kalman filter technology, respectively

    方案一,在星無相對測量時,由衛星自身攜帶的姿態敏感器實現單星高精度姿態確定,利用星通信鏈路進行信息交互,通過簡單的數學計算獲得星相對姿態;方案二,利用類gps相對測量,建立了編隊衛星相對軌運動和相對姿態運動模型及相對離測量方程,推導了兩點相對軌運動模型,設計了擴展卡爾曼濾器及uscented卡爾曼濾器,對相對位置、速度和姿態進行估計。
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