beam approach 中文意思是什麼

beam approach 解釋
波束引導進場著陸
  • 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，...
  • approach : vt 1 向…接近，走近；使接近。2 探討；看待，對待，處理。3 向…接洽[提議]。4 〈美國〉企圖收買。vi 臨...
  1. Abstract : a new method for determining proximity parameters, and in electron - beam lithography is introduced on the assumption that the point exposure spread function is composed of two gaussians. a single line is used as test pattern to determine proximity effect parameters and the normalization approach is adopted in experimental data transaction in order to eliminate the need of measuring exposure clearing dose of the resist. furthermore, the parameters acquired by this method are successfully used for proximity effect correction in electron - beam lithography on the same experimental conditions

    文摘:在電子散射能量沉積為雙高斯分佈的前提下，提出了一種提取電子束光刻中電子散射參數，和的新方法.該方法使用單線條作為測試圖形.為了避免測定光刻膠的顯影閾值，在實驗數據處理中使用歸一化方法.此外，用此方法提取的電子散射參數被成功地用於相同實驗條件下的電子束臨近效應校正
  2. Based upon virtual displacement method and the updated - lagrangian approach, stiffness matrices for two - dimensional elastic - plastic beam model in large displacement were proposed, in the derivation of which transverse stress was included because it was believed that part of the 2nd order effects of various stresses, which are in equilibrium with each other and with the external loads, will counteract each other and neglecting either part would possibly lead to incorrect results

    利用虛位移原理和更新的拉格朗日方法，導出了大位移彈塑性梁單元剛度矩陣的顯式表達式，在剛度矩陣推導中引入了截面內非線性剪應力和橫向應力的影響，剛度矩陣通過了剛體檢驗。之所以要引入橫向應力的影響，是因為本文認為，保持平衡所需的所有應力，它們各自的二階效應會相互抵消，因此忽略其中的任何一項都可能導致不正確的結果。
  3. An experimental approach is given for the measurement of the beam quality factors of an ingaas / algaas sch dqw laser

    本文還通過實驗測量了ingaas algaasschdqw激光器的光束質量因子m ~ 2 。
  4. Babs beam approach beacon system

    飛機進場波束信標系統
  5. Based on the above theory and methods, the main works of this thesis are lasted as follows : starting from the propagation law of partial coherent light and beam coherence - polarization ( bcp ) matrix approach, the properties of pgsm beams through both an axis - symmetric paraxial optical abcd system and an axis - unsymmetric one are studied. the analytical propagation equations of pgsm beams are derived, which enable us to study the propagation - induced polarization changes and irradiance distributions of pgsm beams through an axis - symmetric paraxial optical abcd system and an axis - unsymmetric one

    在此基礎上，本文進行的主要工作有：基於空間-時間域中互強度的傳輸理論和bcp矩陣處理方法，首次研究了pgsm光束通過對稱和非對稱abcd光學系統和光闌的傳輸變換特性，推導出了pgsm光束傳輸表達式，可以對pgsm光束偏振和光強的傳輸變化進行分析。
  6. The approach of the anchoring length of the beam ' s lower longithdinal reinforaing steel bars in the reinforced concrete frame nodes undler earthqnake loads

    在地震作用下鋼筋砼框架節點梁下縱筋錨固長度探討
  7. It is found that the electron beam may approach ideal bunching. high power microwave pulses with tunable frequency can be generated by post - accelerating the electron beam and carefully designing the extraction cavity. in terms of the pic simulation, the output power of 1. 25gw at 2. 2ghz and 480mw at 4. 4ghz in axial acceletron have been obtained

    用增加中間腔的辦法，大大提高了前兩階諧波電流分量，數值計算結果表明，其中一階諧波電流調制系數達到了140 ，二階諧波電流調制系數達到了68 ，通過改變提取腔的設計，可選擇不同頻率的輸出，其一次諧波頻率為2 . 2ghz ，輸出功率為1 . 25gw ，效率為9 . 33 ，二次諧波頻率為4 . 4ghz時，輸出功率為0 . 48gw ，效率為3 . 6 。
  8. 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。
  9. Moreover a novel approach to fabricate array of three - dimensional waveguides in pr crystals employing illuminations of a pair of mutually coherent or incoherent two - beam interference fields is proposed

    並提出了利用一個雙光束干涉場以不同的角度兩次輻照晶體，在光折變晶體中寫入不同通道波導陣列結構的方法。
  10. A numerical approach and a novel analytical solver are used to solve the governing equation of cantilever beam actuated by electrostatic force, and dynamic responses of the cantilever are calculated by mode - superposition

    摘要給出了一種靜電力作用下微懸臂梁控制方程的數值求解方法，提出了求解該模型的近似解析式和修正解析式，並採用模態疊加法計算微梁的動響應。
  11. The beam design approach creates nimble robots from simple components, with no programming required

    很贊賞beam的設計理念：無需編程，用簡單的元件製作出敏捷的機器人。
  12. Adopting high slip motor and increasing the rotary inertia of the rotating parts is an effective approach to achieving good power - saving effect of beam pumping units

    採用高轉差率電動機，並增加旋轉件的轉動慣量，是綜合提高游梁式抽油機節能效果的有效途徑。
  13. Firstly the method of rayleigh - ritz and galerkin were adopted to analyze the beams under loading combined antisymmetric end moments with transverse uniformly distributed load theoretically, and the results were compared with that offered by kirby, p. a and nethercot, d. a, it showed that result was approximate and even lower and so to some extent the approach used in the paper is practice. secondly several principal factors that affect the beam stability were analyzed respectively, especially the shortening effect was mentioned scarely in some literature so far. at last, the author adopted the matlab to program the finite element software to analyze numerically, the results derived from it were agreed well with it

    本文分別採用了rayleigh - ritz法和galerkin法從理論上分析了反對稱端彎矩及橫向均布載共同作用下樑的等效彎矩系數，並與kirby ， p . a和nethercot ， d . a分析結果進行對比，結果表明本文採用的方法得出的等效彎矩系數與其得出結果比較，在均布荷載與端彎矩比例相差不大時基本接近或偏小，說明此方法是可行的，而當均布荷載與端彎矩比例較大時，應根據均布荷載作用進行彎矩等效方法來計算。
  14. On the basis of fbg " working mechanism which is expounded on the approach of mode - coupled theory, the paper analyzes and compares the characteristics of some typical demodulation mechanisms. a novel demodulation mechanism for fbg with a cantilever beam to linearly tunable filtering is designed, and the theoretical and experimental analysis on this demodulation mechanism is explained. although the experiment conditions restrict it, the analysis of the measured data show the mechanism has great effect on the practical applicationjiot only in optical communication and sensor systems

    在使用模式耦合理論詳盡地闡述了光纖光柵工作原理的基礎上，本論文分析比較了幾種典型的傳感解調方案的特點，然後設計了一套新穎的基於懸臂梁線性調諧濾波的光纖光柵解調系統，並對這套系統進行了理論和實驗研究。盡管由於實驗條件所限，最後的實驗結果與實際值稍有差距，仍得到了許多有益的結論。
  15. In this paper, the color dipole approach in the target rest frame is presented and the ratio of the drell - yan cross section per nucleon for an 800 gev proton beam incident on a variety of nuclear targets are calculated and the results are compared with fermilab e772 and e866 experimental data. it is shown that without considering the energy loss effect, the calculated results can fit rather well with experimental data

    本文介紹了靶靜止系中色偶極模型，用色偶極模型計算了800gev質子與原子核碰撞的drell - yan過程的微分截面比，並與e772和e866實驗結果進行了比較。發現：不考慮能量損失，只計及p - a碰撞中的遮蔽效應，理論結果就與實驗符合的很好。
  16. Stoneley wave is a kind of guide waves propagating along the liquid - solid interface in well. when a sonic beam strikes the surface of a thick plate immersed in a liquid, a stoneley wave is generated. stoneley wave approach is applied on analysis of well logging more and more widely in recent ten years with the introduction of advanced analysis methods for component waves from full - waveform array acoustic log data. the spectrum of stoneley waves are used to identify the fractured zones and quantitatively calculate the fracture parameters of reservoirs, especially to evaluate the validity of fractures at fracture - type complex reservoir

    斯通利波是一種沿井壁傳播的聲波，當聲波脈沖與井壁和井內流體的界面相遇時就會產生斯通利波。近十幾年來，由於長源距和偶極子陣列聲波儀在測井中的廣泛應用和全波形陣列聲波測井資料中各組分波的處理分析方法的進步，可將斯通利波分離出來單獨研究並應用於測井資料分析。斯通利波技術是評價裂縫及其滲透性的有效方法。
  17. Furthermore, the paper also provided the approach of non - linear finite element of this new type of composite structure, hi which the factors of cracking of small type hollow concrete block and dark beam ' s stiffness were being considered. at the same time, the time history analysis and stress cloud chart of this spatial structure

    另外，本文還提出了可考慮馬牙搓連接及暗梁剛度的非線性有限元計算模型，對該結構體系進行了時程反應分析、做出了三維結構的應力雲圖，全面地分析了該結構形式的受力特點和抗震性能。
  18. Taking the long span continuous rigid - frame structure of the south bank approach spans of wuhan tianxingzhou changjiang river bridge as the research object, and using the large scale finite element analysis program ansys and two ways of modeling with solid element and spatial beam element, this paper respectively analyzes the dynamic characteristics of the rigid - frame structure of the approach spans, makes a study of the influences of rigidity changes and bearings failure of the thin - wall piers on the dynamic characteristics of the structure of the approach spans and also compares the results of numerical analysis of the two kinds of modeling

    摘要以武漢天興洲長江大橋南岸引橋大跨度連續剛構為研究對象，運用大型有限元分析程序ansys ，採用實體模型與空間梁單元兩種建模方式，分別分析了其動力特性，探討了薄壁墩的剛度變化與支座失效對其動力性能的影響，並對兩種模型的數值分析結果進行了比較。
  19. An attempt is made to use the filled function as the modified function approach to apply global optimization to optical thin film problems. it is proved successful when applied to problems such as antireflection coatings and beam spliters. meanwhile, it is also found that when the number of layers is fixed those local minima with less total optical thickness appear to be better. in the realization. needle method are made to explore the impact of local optimization methods used, parameter of these methods, the starting design, the search accuracy of function and the methods of thickness growth

    從理論分析來看，由於光學薄膜的特性是由在入射介質那一側的等效導納所確定的， needle方法把等效導納作為狀態變量，把每一層的折射率作為控制變量，運用最優控制的原理計算出在薄膜內部每一個厚度對應的點上折射率改變所引起的評價函數的改變，由此選取改變折射率后評價函數變化最大（評價函數變小）的那一點進行插入。
  20. The reflective light filed distribution is studied in great detail with diffraction approach, which is based on the quasi - gaussian beam model of the light emitted from the multimode transmitting fiber and conclusions drawn by beckmann on the scattering light from random rough reflector

    引入了beckmann關于隨機粗糙表面光散射理論的相關研究結論，基於衍射分析法建立了準高斯光經過反射面后的反射光分佈模型。
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