beam boundary 中文意思是什麼
beam boundary
解釋
波束界限-
Consequently, on the basis of non - winkler foundation model, a finite - element method that utilizes foundation flexibility matrix into iterative calculation is proposed in this paper originated from the item " the optimal design theory and research of pile capping beam " sponsored by natural science fund of hunan province, which the continuity of soil mass can be accounted for under various boundary conditions, different loadings and irregular beam characters
本文結合湖南省自然科學基金項目「樁基承臺梁優化設計理論與方法研究」 ，針對非文克爾地基（半空間、線性變形層或單向壓縮層地基模型等）上的樁基承臺梁，提出一種利用地基柔度矩陣來進行迭代的有限單元法，可充分考慮梁下土體的連續性，並對基礎與土體脫開、承臺梁截面變化、梁體邊界條件復雜、上部荷載類型變化以及梁下基樁承載力差異等情況進行分析計算。 -
The laser power is detected through the pd ’ s movement across the faculous region. when the value of the peak value of laser power is got, the power of the facular boundary points can be found according to definition of the facular boundary such as “ 1 / e ~ 2 ” theory. then the equation of the facular boundary can be made fitting by using the least square method, and calculate the beam divergence at last
採用兩個光電探測器分別檢測光束不同高度上的兩個光斑，在確定光斑中心最大光強值后，根據光斑截面尺寸的1 / e2定義，得到光斑截面邊界點的光強值，並以其為標準判定光斑截面的邊界點，對探測到的邊界點通過最小二乘法進行擬合，得到橢圓光斑截面的方程，根據空間幾何關系求出發散角。 -
When the axial speed varies harmonically about a constant mean one, the method of multiple scales is applied to the axially moving beam to determine the instability boundary due to parametric resonance
當軸向運動速度在其常平均值附近作簡諧波動時，應用多尺度法給出軸向變速運動梁參數共振時的不穩定條件。 -
Optimal decay rate of a homogeneous euler - bernoulli beam with boundary control
梁邊界控制的最優衰減率 -
The analytical expressions of reflectance and penetration depth of a light beam transmitted in the back - side - coated chirped mirror are obtained through couple - mode equations with boundary conditions
摘要應用耦合模方程對光波在後端鍍膜啁啾反射鏡中的傳播規律進行分析計算，在分析的過程中加入了邊界條件的影響，推導出後端鍍膜啁啾反射鏡在理想情況下的反射率和穿透深度的解析表達式。 -
The performance of the pbg antenna using the new pbg cover together with a pbg substrate is studied by the fdtd method together with the pml boundary treatment. the numerical results show that a more focused beam radiated in the broadside direction is achieved. the gain of the pbg patch antenna in the forward direction is improved by about 6 db. the radiation directivity is improved significantly and reaches 11. 5 db, which is 0. 4 db less than the maximum value that is allowed physically for this size of the antenna ( this difference is about 4. 1 db less than the difference achieved by thevenot et al.,
用fdtd方法並結合pml吸收邊界條件，我們對加了這種新的覆層結構並且基底鉆孔的復合結構電磁（光子）晶體貼片天線的性能進行了研究，結果證明加了這種新的電磁晶體覆層結構以後，天線的波束收攏很多，並且向前輻射的增益大大提高，與普通天線相比，天線的e面和h面方向圖上向前輻射的增益均提高了約6db ，另外，該復合結構天線的方向性系數達到了11 . 5浙江大學博士學位論文db ，與該物理尺寸天線的方向性系數的理論極限值（ 11 . 9db ）相差0 . 4db ，該差值比thevenot等人設計的電磁晶體覆層天線的相應差值減少了約4 . 1db ，比qiu等人設計的電磁晶體天線的相應差值減少了約1 -
By using auto - adjusting boundary conditions and the method of three cubed spline curve fitting, the system software can recover both of the horizontal and vertical beam profile. the measurement system can also measure the beam landing screen error of cpt. it provides a important measurement and analysis tool to improve the performance of electron gun and dy, and improve the definition of cpt
系統軟體中，提出了採用動態確定邊界條件，通過對離散采樣點的三次樣條插值曲線的擬合恢復束斑x和y方向的輪廓，本系統既能準確客觀地描述電子束輪廓，又能夠準確快速地測量電子束著屏誤差等多種參數，為cpt電子槍和偏轉系統的性能改進與解析度的提高提供了有力的測試分析和研究手段。 -
The finite difference beam propagation method ( fd - bpm ) can simulate the performance of the waveguide accurately. single mode rid waveguide structure parameters are derived by variational - effective index method ; fd - bpm and its transparent boundary condition ( tbc ) are concerned, and then the eim used to transfer a 3d waveguide to 2d waveguide is analyzed ; finally we summarize the characteristic of the y branch
本文先利用變分有效折射率法推導出滿足單模傳輸的脊形波導結構參數;接著介紹了有限差分束傳播法及求解的透明邊界條件，同時分析了將三維結構轉化為二維結構的有效折射率法，最後對y分支的特性進行了模擬。 -
First, i made and improved some beam propagation method ( bpm ) programs, consisting of 2d ( eim - bpm ) and 3d bpm, with transparent boundary condition ( tbc ) and perfectly matched layer ( pml ) boundary condition respectively
首先建立了光束傳播法（ bpm ）的模擬平臺，解決了邊界問題。利用建立的三維bpm平臺設計了漸變折射率波導的mmi耦合器。 -
In this paper, the foundamental principles of fd _ bpm ( finite - difference beam propagation method ) used to simulate and calculate the process of beam propagation is first introduced. then ， the theory of boundary condition is carefully presented. based on those theories mentioned above, a new kind of fd _ bpm arithmetic is brought forward. compared with the traditional arithmetic, this one has much more advantages. in virtue of the new arithmetic, author accomplished the whole simulating designs with two kinds of optical splitter ( stright y - junction optical splitter and sine - type optical splitter ), including propagation field simulating, vital parameter calculating, acquired some optimized waveguide parameters ， and finished the template by those results at last
本文主要藉助這種改進的fd _ bpm演算法，對兩種結構的光分路器（直y型光分路器，上升正弦型光分路器）進行了器件設計的軟體模擬，包括對兩種結構光分路器傳輸場進行模擬，並對兩種結構光分路器的重要參數，如波導寬度，分叉角，縱橫比，損耗進行了模擬計算；得到了一些有價值的優化波導結構參數值，根據這些優化值設計製作了光刻模板。 -
The microstructure observation in the microfissures suggests the liquation microcrack results from grain boundary liquation by constitutional liquation of mc carbides and formation of continuous and or semi - continuous low melting liquid films, however, the occurrence of the solid state microcracks can be attributed to the effect of ultrafast transit thermal shock introduced by high energy electron beam
液化裂紋起源於mc碳化物的組份液化而形成的晶界連續或半連續的低熔點共晶液化膜，固相裂紋形成的則是高能電子束流的快速瞬態熱沖擊效應的直接結果。 -
A scheme is proposed to derive natural frequencies and modal functions of a beam under the given boundary conditions and moving axially at a constant speed
提出在給定邊界條件下確定一勻速運動梁固有頻率和模態函數的方法。 -
This thesis in theory deals with electromagnetic wave scattering by multilayered confocal and non - confocal spheroidal particles illuminated by gaussian beams, in which the main contributions are as follows : 1. in the case of multilayered confocal spheroidal particles, the scattered fields as well as the fields within each layer are obtained in terms of infinite series with spheroidal vector wave functions by using an appropriate expansion of the incident gaussian beam. by virtue of the boundary conditions, we write the set of equations for determining the unknown expansion coefficients and then solve it
本文從理論上研究了多層共焦和非共焦橢球粒子對高斯波束的散射，主要成果如下： 1 .我們研究了多層共焦橢球粒子對高斯波束的散射，把入射高斯光，散射場，各層橢球內的電場和磁場用適當的橢球矢量波函數展開，應用電磁場邊界條件，寫出確定各展開系數的方程組，求出散射場系數，進而求出散射場及散射截面。 -
Anisotropy of beam wander of focused beam in atmospheric boundary layer above sea level
海面大氣邊界層中聚焦光束漂移各向異性的實驗研究 -
An experimental investigation on the transition in the boundary layer of horizontal plane with and without single two - dimensional roughness elements has been carried out in the wind tunnel. the distribution in normal and stream - wise directions of intensity of t - s wave excited by vibrating beam was measured in every condition. neutral curves were obtained by measuring the growth of the t - s wave at the normal critical location along the stream - wise direction
在風洞中對水平光滑平板以及加有粗糙元平板的邊界層轉捩進行了測量與研究，比較了不同情況下平板邊界層內由振動梁激勵生成的t - s波沿流向和法向強度的分佈規律，得到了相應的振型增長曲線以及中性曲線。 -
We consider the solid electron beam. the hot dispersion relation including the electron beam space charge effect is obtained in this paper, by series of propagating with using of the boundary condition and combining with the field matching method
考慮實心電子注，分區求出各區慢電磁波的場方程，然後利用邊界條件，用嚴格的場匹配方法，經過一系列的推導得到了考慮空間電荷效應的「熱」色散方程。 -
The interpolating wavelet bases are constructed in order to deal with boundary conditions conveniently at first. then the wavelet bases of duality in product form are used to construct the generalized field functions of beam, plate and shell. the model of multivariable wavelet fem is built by hellingger - reissner and hu - washizu generalized variational principle
首先構造了便於邊界條件處理的插值小波基，應用乘積型二元插值小波基來構造梁、板、殼的廣義變量場函數，通過二類、三類變量廣義變分原理建立了多變量小波有限元模型。 -
( 4 ) as an application of wavelets, the first, wavelet - based solution to ode to be researched, the second, construction the hermite b - spline bases scale functions with boundary conditions on the interval, combining with garlerkin method, to solve differential equation in finite - length beam problem ; the third, m - scaling function solution to ode in dynamics
（ 4 ）把小波函數用於微分方程的求解中。首先利用插值小波求解常微分方程，其次，滿足邊界條件的小波尺度函數，結合galerkin方法求解結構力學中的微分方程；最後，使用m -尺度函數求解梁結構中的微分方程。 -
For those, this thesis constructions the hermite b - spline bases scale functions with boundary conditions on the interval. combining with garlerkin method, the steps are given to solve differential equation, as an example, it is used to deal with finite - length beam and plate problems
鑒于以上的原因，本文構造了滿足西安建築科技大學博士學位論文區間上邊界條件的hermiteb一樣條尺度函數基，提出galerkin法求解格式，並應用於彈性地基上有限長梁和板問題，給出了數值結果。 -
In order to use transverse vibration frequence and modal shape to identify beam boundary conditions, this paper presents five formulas by using the modified theorem of reciprocal works
摘要基於修正的功的互等原理，利用桿件橫向振動頻率及主振型反算桿件邊界條件推導出了5個計算公式，並進行了數值計算。
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