The full space calculation model, which suits for the asymmetric structure sometimes even including air below the surface of medium, can enable simulative result to approach real one. The FDTD algorithm based on the mixed ABCs is proper to calculate the transmission line where the electromagnetic wave is transmitted in order to send electromagnetic energy along central conductor. The calculation efficiency will be raised if the PML absorbing boundary condition is set on both planes of transmitting direction and so is the MUR two-order absorbing boundary condition in the other planes.

全空間計算模型是適合所有的不對稱結構的待研究體的国产成人高清亚洲影院在线观看，而且包括了介質下面的空氣部分亚洲自拍偷拍一级视频，使仿真更加的接近實驗真實情況手机免费看黄在线高清视频；基于MUR-PML混合吸收邊界條件的時域有限差分法非常適合計算傳輸線這種結構久C视频在线免费观看，因為傳輸線是傳送電磁波的入室迷奷系列视频国产，電磁能量主要是沿著中心導帶行進一級毛片黃色三級片黃色，因此在兩個傳輸端面上設置PML完全匹配層吸收邊界條件，在其他面上設置MUR二階吸收邊界條件日韩成人作爱在线视频播放网站，會大大提高計算效率人人模人人操生活网，而且計算結果與XFDTD仿真軟件計算結果相比較，基本趨于一致羞羞AV漫画在线漫画网免费福利。

In the third part, we discuss a simple class of Sturm-Liouville problems with Dirichlet boundary condition in the first boundary condition and an affine function in the second one.

第三部分我們討論了一類參數邊界條件的Sturm-Liouville問題欧美A级中文字幕免费，其第一邊界條件為Dirichlet條件，第二個邊界條件為特征值參數的線性函數嗯啊青草操。

The results show that the absorbing effect of low-order Higdon absorbing boundary condition is undesirable and relatively strong boundary reflection exists in wave field snapshot and analog recording; the effect of traditional and improved PML absorbing boundary conditions are similar, which can effectively absorb and attenuate the boundary reflections from any angle.

結果表明久久久久久国产免费视网址，低階Higdon吸收邊界條件吸收效果較差，在波場快照和模擬記錄中存在較強的邊界反射国产午夜免费A片完整版视频网站；改進的PML吸收邊界條件與傳統(tǒng)的PML吸收邊界條件效果相當国产黄在线播放免费观看，均能有效地吸收衰減任意角度的邊界反射波。

Take the method of "subarea" and "conjunction" to segment the whole request model to three parts. Making use of boundary continuousness between medium and lining structure at stress and displacement, construct a wave function that can satisfy the stress boundary condition at horizontal surface by the scattering of SH-waves in circular part. And then, availing of the wave function, conjoin the circular part into the semi-circular hollow space at common boundary. The problem can be reduced to solve the question that can only meet the condition of "conjunction". Finally, the solution of the problem can be summarized to a series of algebraic equations and solved numerically by truncating the finite terms of the infinite algebraic equations.

采用"分區(qū)"與"契合"的方法伊人影院在线操在线干影院，將整個求解區(qū)域分割成三部分色播播网免费播播，利用介質與襯砌結構在邊界上的應力、位移的連續(xù)性caopo超碰地址发布页用户登录，構造一個可以自動滿足水平界面上應力邊界條件的圓域對SH波散射的波函數国产理论A片在线观看片；再利用這一波函數將圓域與半圓形凹陷半空間的"公共邊界"進行"契合"，將問題簡化成對一個只需滿足'契合'邊界條件的散射問題的求解成人免费黄网站；最終歸結為對一組無窮代數方程組的求解問題欧美成人人免费HD视频，利用截斷有限項的方法對其進行計算。

Two problems were solved in numerical calculation, one was that a term of 1/r in Maxwell was divergence in cylindrical center where r=0, another was that the value of optical field at cylindrical center was difficult to decided when the cylindrical center set as a boundary condition in Maxwell equation, So the values of optical field need just calculate from cylindrical center to cylindrical boundary, comparing from cylindrical boundary to cylindrical boundary, near upon half CPU time and RAM saved.

計算中解決了在圓柱中心線上Maxwell方程存在發(fā)散項1/r以及用圓柱中心線作為邊界條件時影音先锋天堂最新少妇av，中心線上光場值難確定的問題囯产一级A片久久久免费，因而光場只需從圓柱中心計算到圓柱邊界，和以圓柱的兩條邊做為邊界條件比較91原创国产在线，節(jié)省了將近一半的計算時間和計算機存儲空間丁香六月深爱网婷婷五月。

To research the propagation characteristics of travelling wave along transmission line in depth, the authors establish a mathematical model of travelling wave along lossless transmission line with the format of discrete time and space mesh lines, derive the stable condition and boundary condition of the wave equations using numerical solution of partial differential equation, and attempt the simplification of the boundary condition to realize full decoupling of voltage and current.

為深入研究行波在配電線路上的傳播特性，建立了時間-空間網格線離散格式的無損傳輸線行波數學模型自拍偷拍欧美综合，采用偏微分方程的數值解法推導了波動方程的穩(wěn)定條件和邊界條件欧美熟妇A片黄在线视频，并嘗試對邊界條件進行簡化，以實現電壓和電流的完全解耦。

The author compares the effects of Dirichlet boundary condition and attenuation one on artificial boundary with that on transmitting boundary, so does the absorption effects, the author also demonstrates the advantage of transmitting boundary.

文中還就剛性邊界條件免费看黄色一级片网站、衰減邊界條件對人工邊界的影響及吸收效果與透射邊界作了對比麻豆国产精品，驗證了透射邊界的優(yōu)越性。

With the help of the fundamental theory to singular measure differential system, Green's function matrix expression of solution and well-posed boundary condition are given, together with discussing the properties of the Green's function matrix under the influence of impulsive effect In section 5, based on Lyapunov function method, we investigate that the existence of the first boundary value problem to second-order singular system by macthing the solutions to the second boundary value problem; and the existence and uniqueness of three-point boundary value problem to third order singular system by macthing the solutions to two-piont boundary value problem.

第五部分借助Lyapunov函數法欧美熟妇爱大黑吊性爱视频，通過將第二類邊值問題的解對結成第一類邊值問題的解欧美A日韩A，得到了二階廣義系統(tǒng)的第一類邊值問題解的存在性；通過將兩點邊值問題的解對結成三點邊值問題的解亚洲一级网站，得到了三階廣義系統(tǒng)的三點邊值問題解的存在性和唯一性国产约视频在线播放。

The establishment principles of traditional and improved PML absorbing boundary condition were described. Through numerical simulation, the absorbing effect of improved and traditional PML absorbing boundary and low-order Higdon absorbing boundary on boundary reflection was discussed.

闡述了傳統(tǒng)和改進的PML吸收邊界條件的構建原理，通過數值模擬討論了改進和傳統(tǒng)的PML吸收邊界以及低階Higdon吸收邊界對邊界反射的吸收效果国产操逼视频免费。

The result showed that,if only the necessary but insufficient condition,the equilibrium condition ,was adopted to deal with the infinite uncertain boundary condition,the solution to the stress was non-unique due to the fact that the boundary problem here was a mal posed mathematic problem.

通過兩個典型的半無限體實例，對水平表面作用無限均布壓力下彈性地基的應力和位移解答進行研究中文字幕十二页，結果表明：對邊界條件不明確的無限邊界僅采用解答的必要非充分條件——平衡條件來等效處理深夜在线观看免费，其應力解答不是唯一的，因為此時該邊值問題不是一個適定的數學問題午夜性爱av在线。