扇形波 的英文怎麼說
中文拼音 [shānxíngbō]
扇形波
英文
sectorial wave-
A new kind of fan - beam antennas
一種新型扇形波束天線The beam scans a circular area in the form of a sector which sweeps around and around.
這波束周而復始地呈扇形掃視一個園形區域。Abstract : a new waveguide which can change the wide wall of a rectangular waveguide into a symmetric arc wall is named as a cam - rectangular waveguide. comparing to sectoral waveguide, the new waveguide has the same voltage characteristics and is easier to be produced and fixed. an approximate formula of the dominant mode fields and the normalized conductance of a longitudinal resonant slot cut in the curved wall of a cam - rectangular waveguide are given. a resonant slot linear array in c & x band is designed, in which the slot voltage distribution is equiphase and the input is matched. the input voltage stationary ware ratio and the h - plane pattern of the antenna are measured. the experimental results show the conformance with theoretical results
文摘:把常用的矩形波導一個寬面改成圓弧形構成的波導稱為圓突-矩形波導.這種波導與扇面波導相比：電性能相當；波導管結構更加簡單，容易加工，便於安裝.文中給出圓突-矩形波導中主模場，圓曲面上縱向槽歸一化諧振電導近似公式.設計了c和x波段波導曲面縱向諧振縫隙線陣，縫隙電壓相位為同相分佈，輸入端匹配.實際測量了天線輸入端電壓駐波比和h面方向圖，理論與實驗相吻合Shaped like a palm tree, its “ branches ” fan out into the persian gulf
島嶼呈現棕櫚樹狀，它的「樹枝」向波斯灣呈扇形展開。A device for converting energy form one form to another. in relation to computers, the term is applied to a read / write head, to detector of sector marks in a magnetic disc system, and to electronic / sonic pulse converters of delay line memory
把能量從一種形式轉換成另一種形式的裝置。在與計算機有關時，這個術語用在磁盤系統中的讀寫磁頭、扇面標記的檢測上，以及用在延遲線存儲器的電子或聲波脈沖變換器上。The warriors have bands, ribbons or pins for typing up their hair and the decorations are in the shape of fans, pleats, rolls or splits which seem to be flowing smoothly
束發后的發帶兩端帶頭飄灑于頭頂的前側，帶頭有的呈扇面形，有的呈折波形春卷形雙歧形等，有的翻卷，有的飄動，生動形象，千姿百態。Based on the nonlinear parabolic approximate wave reflection - diffraction equation of mild slope, a model of wave propagation on a fan - shaped coordinate is put forward considering winds, bottom friction and wave breaking, etc. the existing calculation shows that the model can be employed to determine wave fields in large water areas
接著以非線性的拋物型近似波浪緩坡方程為基礎，提出了扇形坐標下的波浪傳播模型，模型包括了風、底摩阻、波浪破碎等因素的影響，可以用於大水域的波浪場的確定；文章最後介紹了一些計算算例。The former one is a product of the pressure pulsation resulting from the fan blade periodically cutting the air, with the blade passing frequency as its base frequency and accompanied by higher harmonics. the wide - band turbulent noise is formed when the rotating fan forces the surrounding air to produce turbulent throw - outs and results in gas thickening and thinning processes
旋轉噪聲是由於風扇的葉片周期性地切割空氣，引起空氣的壓力脈動產生的，以葉片通過頻率為基頻，並伴有高次諧波。湍流噪聲是由於風扇運動導致的周圍空氣發生湍流脫體，使空氣發生擾動，形成氣體的壓縮與稀疏過程而形成的，是一個寬頻帶噪聲。Ultrasound sector scanner
超聲波扇形掃描儀The difficulty in design microstrip pin sp3t switch is the via hole for grounding. we use both the radial parts and the via hole to get a good result. the fin - line pin switch is fully simulated using full - wave analysis, the parasitic parameter and the circuit assemble need to be considered
微帶結構上過孔微波接地效果的不理想，是微帶單刀三擲開關的難點，本文採用了扇形的微波接地和過孔直流接地結合起來，較好的解決了這一問題。分享友人