柱形波前 的英文怎麼說
中文拼音 [zhùxíngbōqián]
柱形波前
英文
cylindrical wavefront-
In the first part of the paper, the explicit form of difference equation and periodic boundary condition is derived in cartesian coordinate system. secondly, the dispersive characteristic is analyzed in cylinder coordinate system for many high power microwave devices use cylinder sws. and then the method is extended to calculate the band structure of 2 - d photonic crystal, a modified yee ’ s grid is introduced to calculate the dispersive characteristic in the case of triangular lattice, so that both square lattice and triangular lattice cases can be solved in cartesian coordinate system
周期電磁結構的一個重要應用就是用作高功率微波器件中的慢波系統，考慮到目前大部分高功率微波器件的慢波系統多採用圓柱周期結構，在論文第四章中，在圓柱坐標系下，給出了差分方程和周期性邊界條件的具體形式，同時編寫程序，分析了milosws ，盤荷慢波結構的色散特性。In this paper, micro - cavity semiconductor laser ( mcsl ) with pillar vertical - cavity surface - emitting structure ( vcsel ) which has potential applications in optical communication and optical interconnect is theoretically analyzed, the calculation model that used to discuss the modal performance of rectangular columnar and cylinder vcsel with oxidized aperture is established by using vector field model. the numerical simulations in the case of cylinder structure show oscillating wavelength and threshold gain against inside and outside radius of laser, the layer refractive index and pair number of bragg mirror, thickness, position and oxidized material ' s refractive index of oxidized aperture, in detail. more practically, considering dos shell of laser as non - perfect one, or supposing that dos shell is separated from the laser, we can obtain more significative results
本工作以矢量場模型出發，對具有誘人應用前景的柱形垂直腔面發射結構（ vcsel ）的微腔半導體激光器（ mcsl ）進行了理論分析，建立了用於分析方柱形和圓柱形結構具有氧化孔徑層的激光器的模式特性的理論模型；對圓柱形結構情況進行了數值模擬，得到了振蕩波長、閾值增益隨激光器內外半徑、 bragg反射鏡層折射率、周期數以及氧化孔徑層厚度、位置和氧化物折射率的詳細變化規律；為使理論計算更接近實際，將外加金屬包殼視為非理想導體，或將金屬包殼與激光器結構隔開，分別對這兩種情況下的結果進行了討論。The cloaking of a cylinder from microwaves comes just five months after schurig and colleagues published their theory that it should be possible. their work is reported in a paper in friday s issue of the journal science
在他們完成在微波中將銅柱隱形的實驗之前的五個月，史銳克和他的同事發表了該隱形理論，並在周五齣版的科學月刊上發表論文報告了他們的實驗成果。The cloaking of a cylinder from microwaves comes just five months after schurig and colleagues published their theory that it should be possible. their work is reported in a paper in friday ' s issue of the journal science
在他們完成在微波中將銅柱隱形的實驗之前的五個月，史銳克和他的同事發表了該隱形理論，並在周五齣版的科學月刊上發表論文報告了他們的實驗成果。Abstract : a numerical investigation of three - dimensional separated flows about a hemisphere - cylinder is presented. the analysis has been restricted to transonic and laminar flows. results are given for the complex flow field structures including shock, boundary layer, separated flow, vertical flow and their mutual effects. the topological structures of the separated flow is shown
文摘:本文數值模擬了半球柱在跨音速、中等攻角時的粘性層流繞流，研究了流場中的復雜三維分離形態結構，其中包含流向與橫向的主分離、二次分離、以及激波邊界層的相互干擾，解釋了在球柱接合部精確捕獲的壓力波動與流動主分離、二次分離的影響關系，這個現象是前人的計算5 ， 6未捕捉到的。Then introduce some corresponding research work on water modeling briefly, expatiate the generating method of water wave in chapter 3, viz. simulate water wave with physical modeling method. we use the integrated kinetic equations, take wave as countless compact water columns, simplify the top surface of these columns, and get the numerical result
論文完成的主要工作包括：在第二章介紹了相關的研究背景之後，第三章首先簡要介紹了目前對水波模型生成所做的研究，在此基礎上，作者採用武漢理工大學博士學位論文完整的動力學模型方程組，將水波當做無數緊密排列的水柱，對水柱的頂平面高度進行簡化、求解，從而得到波形模型。分享友人