hollow beam 中文意思是什麼

hollow beam 解釋
空心電子注
  • hollow : vt 使成凹形，使成空洞，挖空 （out）。 river banks hollowed out by rushing water 被流水掏空的河岸...
  • beam : n 1 梁，棟梁，桁條；（船的）橫梁。2 船幅；（動物、人的）體幅。3 （秤）桿，杠桿，（織機的）卷軸，...
  1. When a collimated - well gaussian laser beam passes through a 27i - phase plate and then focused by a lens, a focused hollow beam ( fhb ) will be generated behind the lens, as a result of the completely ( r = 0 ) and partially ( r 0 ) destructive interference effects around the central region of the beam

    當一束準直的高斯光束通過具有2位相分佈的位相片和一個薄透鏡時，這將導致在入射高斯光束中心的完全和部分相消干涉效應，於是在透鏡后就會形成一束聚焦中空光束（ fhb ） 。
  2. On the other hand, the electric field and intensity distributions of the he11 mode in the hollow fiber are calculated by using the exact solutions of maxwell equations based on the vector model, and the diffracted near - and far - field distributions of the he11 - mode output beam under the fresnel approximation are studies. we derive an analytical expression on the far - field distribution of the he n - mode output beam in free space and discuss its applicable condition. we also analyze and compare the differences between the he11 - and lp01 - mode output beams, and find that the near - field distribution of the lpoi - mode output beam is a gaussian - like one, but the near - field distribution of the he11 - mode output beam is a doughnut - like one, whereas the far - field distribution of both the lp01 - and he11 - mode output beams are a doughnut one

    此外，我們把中空光纖中lp _ （ 01 ）模（標量模型）和he _ （ 11 ）模（矢量模型）的場分佈以及它們各自的輸出光束的近場與遠場分佈進行了比較，發現兩種模式的輸出光束在近場分佈有很大的區別， lp _ （ 01 ）模輸出光束在近場是一個高斯分佈，而he _ （ 11 ）模輸出光束在近場是一個中空光束，在遠場兩種模式的輸出光束分佈是基本一致的，這正是由於在中空光纖中採用了弱波導近似以後所引起的誤差。
  3. Static loading tests of a 20m hollow slab beam

    空心板梁靜載試驗研究
  4. Construction technique for cast - in - situ continuous hollow - slab beam

    現澆連續空心板梁施工技術
  5. Based on huygens - fresnel diffraction integral theory, the propagation properties of bessel beam were studied in this paper. by using the analyses of geometrical optics, hollow beam are found and the formula of the starting point 、 the end point and the bottle length can be got

    論文中，我們基於惠更斯-菲涅耳衍射積分理論研究了由軸棱錐產生的貝塞爾光束的傳輸特性，並且通過幾何光學解析無衍射光束的聚焦特性。
  6. 200mm 100mm safety fences and barriers for highways - specification for components for tensioned rectangular hollow section beam 200 mm x 100 mm safety fence

    公路的安全欄桿和護柵.張緊式矩形空心梁
  7. 100mm 100mm safety fences and barriers for highways - specification for components for tensioned rectangular hollow section beam 100 mm x 100 mm safety fence

    公路的安全欄桿和護柵.張緊式矩形空心梁
  8. The method for design thin - wall core box cast - in - site concrete hollow floor using common structural computing software is put forward and the scale for the magnifying stiffness coefficient of the spandrel beam and middle beam is discussed

    5 、提出了採用常用的結構計算軟體計算薄壁箱體現澆混凝土空心樓蓋設計的方法，提出了邊梁和中梁剛度放大系數的建議。
  9. Supervision of construction quality of prestressed hollow slab beam by post - tensioning method

    后張法預應力空心板梁的施工質量監理
  10. Introduction on putting prestressing in prestressed concrete hollow slab beam of qutan bridge

    曲潭大橋預應力砼空心板梁施加預應力簡介
  11. Hollow slab beam

    空心板梁
  12. Construction technology of pre - stressing concrete hollow plate beam precasted by monolithic tension method

    整體張拉法預制預應力混凝土空心板梁
  13. When a larger waist w of the incident gaussian beam and a shorter focal length / of the lens are chosen, we can obtain an extremely - small dark spot size of the focused hollow beam, even approach the diffraction limit

    當選擇較大的入射準直高斯光束的束腰w _ 0和較短的薄透鏡焦距f時，可以在焦平面上產生一個很小的dss （或束半徑r _ 0 ） ，甚至可以接近衍射極限。
  14. The physical mechanism to generate a dark hollow beam from the output beams of a lp01 mode ( scalar model ) and a he11 mode ( vector model ) in a micro - sized hollow optical is analyzed

    本文就利用中空光纖中lp _ （ 01 ）模（標量模型）和he _ （ 11 ）模（矢量模型）衍射輸出產生中空光束的物理機制進行了詳細的理論研究。
  15. The definition of dark hollow beam ( dhb ) and its generation are introduced in this thesis. at the same time, the principle, methods and experimental progress of atomic guiding in hollow optical fibers, blue - detuned evanescent wave and dark hollow beams are reviewed in some detail. finally, the basic definition of the angular momentums of all kinds of the hollow beams and their application are discussed

    本文簡單介紹了中空光束的定義及其產生方法，同時綜述了採用中空光纖中紅失諧高斯模式、中空光纖中藍失諧消逝波和藍失諧暗中空光束實現原子導引的原理、方法和實驗及其最新進展，並對各類中空光束的角動量及其轉換和應用進行了詳細的介紹和討論。
  16. Intensity - gradient cooling of atoms in a localized - hollow beam

    局域中空光束中原子的強度梯度冷卻
  17. The construction and quantity control of pre - stressed hollow beam of the northern of second circle freeway

    北二環高速公路預應力空心板施工及質量控制
  18. Due to the extremely - small dark spot size of the focused hollow beam in the focal plane, it can be used to form an atomic lens with a high resolution

    由於這一聚焦中空光束在它的焦平面上具有很小的dss ，可以用來聚焦原子束以形成原子透鏡。
  19. After the focal plane, the focused hollow beam propagated according to a constant angle of divergence, the dss become larger, and the intensity become weaker

    經過焦點后，這一聚焦中空光束將以一定的角度發散，它的dss會變得越來越大，光強度變得越來越弱。
  20. We also propose two models to describe the propagation charcteristic of the focused hollow beam in 3d free space : one is the modified tem _ ( 01 ) mode doughnut beam model, the other is the width and narrow gaussian beam model

    同時我們還提出了兩種聚焦中空光束的理論模型，一種是修改的tem _ （ 01 ）模式的doughnut光束模型，另一種是寬、窄高斯光束模型。
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