l beam 中文意思是什麼

l beam 解釋
l形梁
  • l : L-beam, L-iron 不等邊角鋼。L,￡＝ 〈拉丁語〉 libra （＝ pound）。
  • 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. Mutant breeding l - argining - producing bacterium by n beam

    精氨酸產生菌的離子束誘變育種
  2. The beam from the laser l passes through the shutter s.

    激光器L發出的光束經過快門S。
  3. Lin h, li l and zeng l., " in - situ end - point detection during ion - beam etching of multilayer dielectric gratings ", chin. opt. lett., 3 ( 2 ), 63 ( 2005 )

    林華， "介質膜光柵:光刻膠掩模占寬比和離子束刻蝕槽深的監控" ，博士論文，導師:李立峰（ 2006 ）
  4. The beam from the laser l passes through the shutter s, is spread by the objective lens.

    激光器L發出的光束經過快門S，被物鏡所擴散。
  5. On the radiation range of l - 4gw / cm2, the effects of the modulation in intensity, beam aperture, pulse width and intensity of 3 w on tsrs in frequency convector crystals have been analyzed in detail. the interrelated thresholds have been gained by calculating and theoretical evidences have been offered to prevent tsrs from damaging frequency conversion crystals, which will be applied to the engineering design of the laser drivers on high - fluence

    光的強度調制、光束口徑、脈寬和強度等因素對諧波轉換晶體中tsrs的影響，並計算得出了一些相關闡值，得到了驅動器工作的臨界狀態，為防止出現tsrs的光損傷提供了理論依據，對高功率激光驅動器的工程設計具有實用價值。
  6. ( 2 ) based on the propagation equation of fgbs passing through unapertured paraxial abcd optical systems, the similar transformation conditions are obtained for the first time, which is expressed as that two fgbs with the same beam order have similar intensity distributions at the two positions of equal generalized fresnel number when they propagate through two ajb, cjdi ( i = l, 2 ) systems. furthermore, a comparison between a fob and a sgb of the same beam a ^ - factor but different waist widths is performed for the first time

    （ 2 ）通過對作為整體的平頂高斯光束在無光闌限制近軸abcd光學系統中傳輸公式的分析，首次得到了平頂高斯光束的相似變換條件，即階數相同的平頂高斯光束在傳輸矩陣為a _ ib _ ic _ id _ i （ i = 1 ， 2 ）的兩個光學系統中傳輸時，在菲涅爾數相等的兩個面上具有相似的光強分佈。
  7. There are many lifting equipments with thousands of varieties and specifications, such as l series of electric single beam cranes and manual single beam cranes, q series of electric bridge - style cranes, m series of gate - style cranes, qt series of tower cranes, and h series of electric hoist cranes, which are widely used in the industries of metallurgy, machine, mine, railway, port, oil, chemical industry, construction and so on

    集團的主要產品有l系列電動系梁起重機及手動單梁起重機， q系列電動橋式起重機， m系列門式起重機， qt系列塔式起重機， h系列電動葫蘆及其它形式的起重機械共有千個品種規格，廣泛應用於冶金、機械、礦山、鐵路、港口、石油、化工建築等行業。
  8. A cyclic radial shearing interferometer was used to diagnose the wavefront distortion of a laser system and an lcslm ( liquid crysnd spatial ligh modulator ) was used to control it. some results have been summarized as follows : l. according to the theory of scalar quanity diffeaction and the model of the random gaussian phase screen of low frequency wavefront, the effect of the low frequency wavefront with different rms gradient on the focal spot of a laser beam was studied

    本論文在激光光束波前畸變檢測和控制上進行了新的探索，主要就空間相位調制環路徑向剪切干涉儀以及它對波前畸變的檢測和液晶空間光調制器及其對中頻段波前畸變的控制進行了研究，其研究的內容和取得的成果如下：一、根據標量衍射理論，結合低頻波前畸變的高斯隨機位相分佈模型，研究了不同均方根梯度低頻畸變波前對激光光束焦斑聚焦性的影響，並採用描述中頻段波前畸變的功率譜密度概念，模擬計算了它對激光焦斑旁瓣的貢獻。
  9. The ultra - thin er layers with the thicanesses in the range of 0. 5 ~ 3 monolayer ( ml ) are formed by electron beam evaporation on si ( 00l ) substrate at room temperature in an ultra - high vacuum system. after annealing at lower temperatures, ordered simcfores form on the surface. the trallsition of the surface reconsmiction pattem from ( 2 x l ) to ( 4 x 2 ) with the increase of er coverage up to l ml is observed by the reflective high energy electron diffraction ( rheed ) and low energy electron diffraction ( leed )

    本文是關于硅（ 001 ）襯底與電子束淀積的鉺、鉿原子反應形成的超薄膜的界面與表面性質的研究，以及在該襯底上出現的共振光電子發射現象，包括了以下四個方面的工作： 1鉺導致的硅（ 001 ）襯底上的（ 4 2 ）再構研究利用反射高能電子衍射和低能電子衍射，在室溫淀積了0
  10. Lin h, li l and zeng l., " in - situ monitoring during ion - beam etching of multilayer dielectric gratings : simulation and experiment ", holography, diffractive optics, and applications ii, spie, 5636, 143 ( 2004 )

    林華，李立峰，曾理江， "利用導波耦合角度實時控制光刻膠光柵掩模的占寬比" ，光學學報， 26 ， 767 ? 772 （ 2006 ）
  11. For example, frp reinforced concrete is used to support or surround magnetic resonance imaging ( mri ) medical equipment, and frp is also used for the constructions of some seawalls, industrial roof decks, base pads for electrical and reactor equipment, anchor in rock and ground engineering and concrete floor slabs in aggressive chemical environments in order to promote the wide usage of frp and frp reinforced concrete structures, financed cooperatively by nationa l natural science foundation ( item : the research on mechanical performance of frp reinforced concrete beam reinforced ; number : 59978046 ) and henan illustrious youth science foundation, connected with the analysis methods of modern steel reinforced concrete structure, the thesis further studies the flexural performance of frp reinforced concrete beam through the systematic study on experimental data got from this kind of beams, systematically establishes the theoretical calculating system of the flexural performance of frp reinforced concrete beam in cooperation with the up - to - date analytical methods for reinforced concrete, which suits the properties of frp

    例如，纖維增強塑料筋應用於支撐和圍繞磁共振成像醫療設備的混凝土中及海堤、工業頂棚、電設備、反應設備的基座、巖土工程中的錨桿、侵蝕性環境的混凝土結構等海洋工程、橋梁工程、路面工程、巖土工程、醫療及化工工程的建設。為了推動纖維增強塑料筋及其混凝土結構在工程中的廣泛應用，本文在國家自然科學基金（項目名稱：纖維增強塑料筋混凝土梁力學性能的研究；編號： 59978046 ）和河南省傑出青年基金的資助下，通過對纖維增強塑料筋混凝土梁正截面受彎性能試驗數據的系統分析，結合現代鋼筋混凝土結構學的分析方法，對纖維增強塑料筋混凝土梁正截面受彎性能進行了深入的研究，較系統的建立了適合於纖維增強塑料筋特點的纖維增強塑料筋混凝土梁正截面受彎性能的理論計算體系。
  12. The mathematic model of the ultra - thin spherical mirror is to be treated as elastic thin shell. then the predigested model, i. e., bended beam, used in qualitative analysis was proposed, and its deflection and stress formulas under the freely supported condition were set up. based on an off - axis aspherical primary mirror, the relationship of aspherical surface error ( rms ) in tangential plane with bended beam ’ s radius r, position s of concentrated load p and geometry length l of arc was analyzed

    根據這一設想，本文建立了超薄鏡的數學模型?薄殼，並提出了強制力作用下超薄鏡的簡化模型?曲梁，推導了曲梁在簡支情況下受力變形的撓度公式，並結合一個實例，計算出曲梁變形后與所需非球面的面形殘差（ rms ）在子午方向與曲梁弧長l 、曲梁半徑r及集中力位置s的關系及滿足面形精度的r和s范圍，分析了弧矢方向的rms ，得出了同時滿足子午和弧矢方向面形要求的l 、 r和p 。
  13. The main achievements of this thesis are as follows : l. the effect of the frp reinforcement ratio on cracking moment is analyzed. the calculating method and corresponding calculating formulas of flexural cracking moment of frp reinforced concrete beam are put forward

    分析了纖維增強塑料筋配筋率對纖維增強塑料筋混凝土梁正截面開裂彎矩的影響，提出了纖維增強塑料筋混凝土梁正截面抗裂度的計算方法和相應的計算公式。
  14. 4. we attempted to carry out the experiment of co a3 ( v = 18 ) / d1 ( v = 10 ) collision with he in a static cell using oodr - mpi technique for the preparation of doing experiment in a molecular beam machine. in the experiment of 2 + 1 ' + 1 " two - color rempi, we conformed the accidental predissociation of co ( e1, v = l ) state, and studied the effect of the accidental predissociation of co ( e1, v = 1 ) state for different rotational states

    4 .為了在分子束實驗條件下進行實驗，用光學一光學雙共振多光子電離光譜（ oonr一mpi ）的方法，在靜態池條件下，對較長壽命的eo （ a 』 n ， v = 18 ） / （ d 』 ， v = 10 ）單重態一三重態之間的碰撞傳能實驗進行了嘗試。
  15. First of all, the paper carried out test study on four two - spanned model members of fsmrcwb, including three 1 / 2 - scaled two - storeyed models and one 1 / 3 - scaled three - storeyed model. the study considered such factors as span ratio - l1 / l2, height - span ratio - hb / l of the beam, and cavity etc. the paper analyzed the test results, including analysis on mechanical property of the composite wall beam under vertical loads, and failure mode, deformation capacity, aseismic performance under horizontal loads and constant vertical loads

    首先，進行了三個兩跨兩層和一個兩跨三層的框支密肋復合墻梁的模型試件試驗研究，主要內容包括：框支密肋復合墻梁在豎向荷載作用下的受力性能，在豎向荷載與水平低周反復荷載共同作用下的受力性能、變形性能、滯回性能和破壞形態，並將框支密肋復合墻梁試驗與框支砌體墻梁試驗進行對比分析。
  16. The third, some groping researches are made on broadband coaxial line filter output circuit of klystron. a broadband output circuit - mode four coupling slots double - gap output cavity loaded with coaxial filter, which has a workable relative bandwidth bigger than 14 % and fits in with l - band multi - beam klystron, is designed. meanwhile some analysis of its stability and peak power capacity is made

    第三，對速調管同軸線濾波器寬帶輸出迴路進行研究和探索，設計出了一個適合用於l波段多注速調管、相對帶寬超過14的四耦合槽模強耦合雙間隙腔加載同軸線濾波器輸出迴路，並對其穩定性和峰值功率容限做了一些分析。
  17. Ion beam bioengineering which is created by professor z. l. yu is a new cross subject

    離子束生物工程學是余增亮先生開創的新興交叉學科。
  18. 4. the tunable l. ssum external cavity laser diode by using fiber bragg grating is reported. utilizing cantilever beam tuning method, a tuning range 7nm is achieved

    （ 4 ）採用光纖bragg光柵作為外腔反饋元件，首次將光纖光柵的懸臂梁調諧方法用於外腔調諧技術中，完成了1
  19. Second the model of array was considered to have elements of finite width and infinitely large elevation dimension. this model ignore the effect of elevation on beam focusing. this paper study on phased array which was considered to have elements of finite width and finite elevation dimension, the influences of transducer parameters on focusing effect is analy / ed, including the number of elements ( n ), interelement spacing ( d ), elevation dimension ( l ), width dimension ( )

    這種方法雖然計算方便，但實際很難實現，真正的振元總是有一定的尺寸，這種方法忽略了陣元的尺寸對聚焦效果的影響，后來，另一種線性陣的模型被提出，即認為單個陣元具有一定寬度a ，長度l為無限長，或者說a遠小於l ，這種模型忽略了陣元長度l對聲波聚焦效果的影響。
  20. Laser beam can be coupled to y - fiber, plastic fiber and glass fiber which with big diameters ( l - 2mm ) much easier than quasi monomode fiber whose diameter is only several microns. the former fibers can transmit much more beam illumination, but their light fields are not as even as the quasi monomode fiber ' s

    分析了使用傳光面直徑較大的y型光纖、塑料光纖和玻璃光纖與芯徑較小的準單模光纖所具有的不同特點，簡要討論了光纖的光場分佈、耦合、偏振以及光纖的選擇等問題。
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