This paper, with the analysis of the propagation characteristics in a lossy cylindrical waveguide and using small-signal theoretical dispersion relation, presents study on the device stability with influence of the absolute instability and the backward wave oscillation in TE01-mode lossy dielectric-load gyrotron traveling wave amplifier.

摘要該文從分析損耗介質(zhì)加載金屬圓波導(dǎo)中電磁波傳輸特性出發(fā)，應(yīng)用回旋行波管放大器小信號(hào)色散方程黄色网站午夜影院，研究損耗介質(zhì)加載結(jié)構(gòu)TE01呐谙呤悠狄磺回旋行波管放大器絕對(duì)不穩(wěn)定性振蕩和回旋返波振蕩對(duì)器件穩(wěn)定性的影響。

Basing on the nonatationary linear mild-slope equation developed by Hong Guangwen in 1995, a complete wave model is built considering the bottom friction, nonlinear dispersion relation, and allied reflection and diffraction of several islands. Integrating with corresponding physical and imaginary boundaries, it is solved through Alternating Direction Implicit difference method.

本文以洪廣文(1995)推導(dǎo)的非定常線性波緩坡方程為基礎(chǔ)www.zuneauto.com，建立考慮底摩阻項(xiàng)日韩孕妇自拍视频直播网站在线观看，非線性彌散關(guān)系，及多島嶼繞射反射作用的緩坡方程求解模式日韩精品直播一页不卡在线观看，采用經(jīng)典的ADI法差分格式黄a淫荡视频，結(jié)合物理和虛擬邊界條件進(jìn)行求解。

In addition,the dispersion relation and delay characteristics of the coupled mode in two different YIG films are studied by numerical analogue in the range of inclination angle from 5° to 20°.

本文研究了在傾斜靜磁場(chǎng)作用下亚洲欧美第一页，雙層YIG薄膜波導(dǎo)結(jié)構(gòu)中靜磁體波的傳播特性最近中文免费资源，得到了其色散的特征方程，計(jì)算了磁場(chǎng)傾角從5°到20°范圍內(nèi)雙層波導(dǎo)結(jié)構(gòu)中靜磁體波傳播的色散關(guān)系和延遲特性业余处女视频网站。

On the basis of the dispersion relation, we investigated the properties of nonlinear surface waves. It is shown that there exist backward surface waves, with the phase velocity and group velocity opposite in direction. For transverse electric waves, the nonlinear wave equation is transformed into Bernoulli equation, and the exact solutions of magnetic fields are obtained.

在色散關(guān)系的基礎(chǔ)上研究了非線性旋磁表面波的頻率特性欧美精品视频国，揭示了該系統(tǒng)能激發(fā)后向表面波，其群速度與相速度反向漂亮姑娘一级黄色；將反鐵磁晶體中TE表面波滿足的非線性波動(dòng)方程變形為伯努利方程国产在线吧直达，用反函數(shù)形式給出了表面波磁場(chǎng)的精確解。

Similarly there emerges a new branch of dispersion relation curve in the original frequency gap.

首先簡(jiǎn)要概述了極性晶體中的極化激元的基本特性国产三级精品三级在线播放，它的研究歷史和現(xiàn)狀99re在线这里只有精品视频7。

This is due to the fact that the numerical dispersion relation of the cylindrical wave differs from that of the plane wave.

這是由于事實(shí)圓筒形的波數(shù)字散布關(guān)系不同于平的波特级性爱AA片。

Using finite difference time domain method, the electromagnetic field distribution of THz wave is simulated in a THz 2D PC splitter and by plane wave expansion method the dispersion relation and defect modes are achieved in a THz rotated PC waveguide.5. A woodpile three-dimensional (3D) PC with face-centered-tetragonal symmetry is one of the most popular 3D PCs because of its favorable band gap characteristics. Based on the woodpile fct lattice structure, we propose a novel woodpile THz lattice structure with comparatively decreased symmetry, better band gap properties and easy fabrication by varying some structure parameters.

計(jì)算結(jié)果為利用非線性光學(xué)差頻方法產(chǎn)生THz輻射源的實(shí)驗(yàn)研究提供了深入和全面的理論基礎(chǔ)免费一级A男女牲交；四、利用平面波展開法免费激情图片视频，通過改變二維THz光子晶體的結(jié)構(gòu)參數(shù)亚洲国产黄色视频免费网站，對(duì)二維THz光子晶體完全帶隙進(jìn)行了優(yōu)化，分析出兩種適合工作在THz波段的二維光子晶體結(jié)構(gòu)一级性爱在线看；采用時(shí)域有限差分法和平面波展開法久久九九久九久，計(jì)算出THz波在二維光子晶體"T"型分束波導(dǎo)，45度旋轉(zhuǎn)波導(dǎo)中傳輸?shù)碾姶艌?chǎng)分布以及缺陷模亚洲爱爱小视频；五精品国产A片、Woodpile面心立方四角結(jié)構(gòu)是三維光子晶體中被研究最廣泛的結(jié)構(gòu)之一99re热在线免费视频精品观看。

Based on this, a new WENO difference scheme which based on Dispersion-Relation-Preserving relation is developed, and representative test cases with this scheme for computational aeroacoustics problems has been implemented and compared in order to test capability of wave capturing; In addition, WENO schemes generally do not converge at high order in the presence of contact discontinuity of Euler equations, so a conservative front tracking technique coupling WENO schemes and Level Set method to simulate the translating density profile is presented here, and numerical simulation with this technique for representative test case has been implemented and results show the desired accuracy.

本文研究了高階精度加權(quán)基本無振蕩格式及其在雙曲守恒律方程中的應(yīng)用，在此基礎(chǔ)上作了兩個(gè)方面的工作：一是針對(duì)高頻聲波問題構(gòu)造出一種基于保色散關(guān)系的WENO有限差分格式av在线.con，并對(duì)計(jì)算氣動(dòng)聲學(xué)問題的代表性算例進(jìn)行了大量數(shù)值實(shí)驗(yàn)日韩激情一级毛片免费，比較了該格式捕捉波數(shù)的能力；另外丝袜欧洲另类自拍视频在线观看网站，針對(duì)高階WENO格式在處理Euler方程的接觸間斷時(shí)精度有所降低的問題成年18岁在线网站，研究了利用界面追蹤技術(shù)Level Set方法和高階激波捕捉WENO格式相結(jié)合的一種守恒追蹤方法，并且給出有代表性的密度滑移面問題的算例欧美在线免费观看av片，得到一致高階精度的數(shù)值模擬結(jié)果www.色色视频com。

The numerical results of the dispersion relation show some nonlinear effects: for a fixed geometry of a waveguid, beam parameters and plasma density, the increment of the modulation parameter may lead to a slight increment of the operating frequency, However, as the modulation parameter increases further, saturation may occur and the dispersion relations are hard to be separated, it is due to the overmodulation of the microwave power, this phenomenon itself belongs to the nonlinear effects.

五。用嚴(yán)格的場(chǎng)匹配方法分析了填充等離子體的耦合腔鏈殴美大吊性交久，研究了等離子體一腔模的形成以及&冷&帶寬和&熱&帶寬的展寬效應(yīng)操b福利视频。等離子體填周期性耦合腔(來源：Aae53d3BC論文網(wǎng)www.abclunwen.com)鏈后，形成周期性的截止頻率為0的等離子體TG模式精品自拍偷拍视频。如果填充的等離子體密度較低時(shí)手机免费看黄在线高清视频，腔模和槽模的工作頻率均有小幅上升，而帶寬改善不明顯亚洲天堂aⅴ在线。

The linear dispersion relation of the enhanced equations is the Pad\'{e} [4,4] expansion of the linear Stokes dispersion relation, the accuracy of which is acceptable even when the relative water depth is as large as 1.0. Its nonlinear property and shoaling gradient are also improved.

改進(jìn)后方程的線性色散關(guān)系達(dá)到了一階Stokes波色散關(guān)系的Pad\'{e}[4免费久久视频，4]近似，在相對(duì)水深達(dá)1.0的強(qiáng)色散波浪時(shí)仍保持較高的準(zhǔn)確性中文黄色字幕网站，并且方程的非線性和線性變淺率都得到了不同程度的改善一级二级黄色免费城人特级黄色视频。