波束界限 的英文怎麼說

中文拼音 [shùjièxiàn]
波束界限 英文
beam boundary
  • : Ⅰ名詞1 (波浪) wave 2 [物理學] (振動傳播的過程) wave 3 (意外變化) an unexpected turn of even...
  • : Ⅰ動詞1 (捆; 系) bind; tie 2 (控制; 約束)control; restrain Ⅱ量詞(用於捆在一起的東西) bundle;...
  • : 名詞1 (相交的地方; 劃分的界限) boundary 2 (一定的范圍) scope; extent 3 (按職業、工作或性別等...
  • : Ⅰ名詞(指定的范圍; 限度) limit; bounds Ⅱ動詞(指定范圍, 不許超過) set a limit; limit; restrict
  • 波束 : wave beam; beam; wave packet波束空間 [半] wave number space
  • 界限 : 1 (分界) demarcation line; dividing line; limits; bounds; boundary; range; limitation 2 (限度...
  1. 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
  2. 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導結構參數;接著介紹了有差分傳播法及求解的透明邊條件,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。
  3. In 1985, takeshi kodama et al. [ 12 ] expressed the wavefunction as the combination of the function of the single electron in a one - dimensional square well with the finite barrier to calculate the binding energies of the exciton. this form does n ' t satisfy the continuity of the function and of its derivative divided by the band - mass

    1985年, takeshikodama等人在計算激子的縛能時把單電子的函數( x , y )取為一維有深方形量子阱中函數的乘積,這種取法在邊上不滿足函數的連續性條件及粒子流( 1 / m ~ * ) ' ( x , y )的守恆條件。
  4. Our first example of confining waves will be to confine a wave at one boundary.

    的第一例子是使動在一個面上受到制。
  5. There were troubles in the continuity of the function and of its - derivative divided by band - mass on the boundary. in the theoretical calculation, the wave function is relative to the physical properties of the impurity greatly, the envelop function f ( x, y ) is expanded in terms of the one - dimensional linear harmonic oscillator function in this paper. it satisfies the continuity of the function and of its - derivative divided by the band - mass, so it improves the precision of the function and binding energy

    與以往工作不同的是,以前選用的x , y方向電子的包絡函數f ( x , y )是一維有深量子阱中函數的乘積,在邊函數的連續性和粒子流的守恆條件存在問題;而在理論計算中,函數的選取與雜質的物理性質有密切關系,本文選取的電子的包絡函數是用一維線性諧振子的函數展開而成的,在邊上能夠同時滿足函數的連續性及粒子流( 1 / m ~ * ) f ' ( x , y )的守恆條件,從而使得函數和縛能的精確度得到了改進。
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