Description: The dispersion relation and the optical transmittance of a two-dimensional photonic crystal composed of the
hexagonal array of cylindrical air holes fabricated in a dielectric slab were analyzed by group theory and the
numerical calculation based on the fi nite-difference time-domain method. The decay rate of the leaky modes
that exist above the light line ~the dispersion relation in air! in the band diagram was also evaluated, from
which the absence of the coupling between certain internal eigenmodes and the external radiation fi eld was
shown. This phenomenon was related to symmetry mismatching by the group-theoretical argument. Platform: |
Size: 185066 |
Author:Qtai |
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Description: TotalWES.m是主干程序，而DCoef和FCTforAW是里面调用的函数。TotalWES只要实现交错网格有限差分波场数值模拟，其中的FCTforAW是用来消除数值频散的。这些是实现弹性波波场模拟的程序，其它两个文件是实现声波波场模拟的程序-TotalWES.m is the backbone of the procedure, and DCoef and FCTforAW is inside a function call. As long as the realization of TotalWES staggered grid finite difference numerical simulation of wave field, which FCTforAW is used to eliminate the numerical dispersion. These are the realization of elastic wave field simulation procedures, the other two documents are to achieve the sound the ball field simulation procedures Platform: |
Size: 5120 |
Author:Simone |
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Description: The dispersion relation and the optical transmittance of a two-dimensional photonic crystal composed of the
hexagonal array of cylindrical air holes fabricated in a dielectric slab were analyzed by group theory and the
numerical calculation based on the fi nite-difference time-domain method. The decay rate of the leaky modes
that exist above the light line ~the dispersion relation in air! in the band diagram was also evaluated, from
which the absence of the coupling between certain internal eigenmodes and the external radiation fi eld was
shown. This phenomenon was related to symmetry mismatching by the group-theoretical argument. -The dispersion relation and the optical transmittance of a two-dimensional photonic crystal composed of thehexagonal array of cylindrical air holes fabricated in a dielectric slab were analyzed by group theory and thenumerical calculation based on the Platform: |
Size: 184320 |
Author:Qtai |
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Description: 一个有关FDTD数值色散问题的MATLAB程序，可以看看影响情况-A FDTD numerical dispersion problem of the MATLAB program, you can look at the impact Platform: |
Size: 1024 |
Author:长空一笑 |
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Description: 本书详细论述了光纤中的各种非线性效应.全书共分 10章.分别介绍了光纤和非线性光学，光纤模式及有非线性源时脉冲的传输，综述了光纤中的基本传输方程的数值方法、群速度色散、自相位调制、··… 等内容.本书自始至终强调了各种非线性效应对光ill信的影响，对从事非线性光纤光学研究及光纤通信的科研人员及大学教师、本科生和研究生是一本非常有用的参考书.
-This book discusses in detail the various nonlinear optical effects. The book is divided into 10 chapters. Introduced the fiber and nonlinear optics, optical fiber non-linear source model and the pulse transmission, an overview of the basic fiber transfer equation and numerical method, group velocity dispersion, self phase modulation,** ... and so on. This book consistently emphasize a variety of nonlinear effects of light ill effects of the letter, engaged in non-linear fiber optics and fiber optic communications R & D personnel and university teachers, undergraduate and graduate students are a very useful reference book. Platform: |
Size: 8602624 |
Author:yangiy |
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Description: 本书详细论述了光纤中的各种非线性效应.全书共分 10章.分别介绍了光纤和非线性光学，光纤模式及有非线性源时脉冲的传输，综述了光纤中的基本传输方程的数值方法、群速度色散、自相位调制、··… 等内容.本书自始至终强调了各种非线性效应对光ill信的影响，对从事非线性光纤光学研究及光纤通信的科研人员及大学教师、本科生和研究生是一本非常有用的参考书.
-This book discusses in detail the various nonlinear optical effects. The book is divided into 10 chapters. Introduced the fiber and nonlinear optics, optical fiber non-linear source model and the pulse transmission, an overview of the basic fiber transfer equation and numerical method, group velocity dispersion, self phase modulation,** ... and so on. This book consistently emphasize a variety of nonlinear effects of light ill effects of the letter, engaged in non-linear fiber optics and fiber optic communications R & D personnel and university teachers, undergraduate and graduate students are a very useful reference book. Platform: |
Size: 8848384 |
Author:yangiy |
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Description: 光孤子传输特性模拟 在光纤通信中，光脉冲信号在光纤中传输的过程中会受到色散、损耗和非线性等作用的影响而不断地发生演化和畸变。脉冲演化的规律遵循非线性薛定谔方程（NLSE）。由于NSLE 在一般情况下无法求得它的解析解，因此通常需采要用数值方法来求解，最终归结于求解归一化的NLSE。本文使用了分步傅里叶方法对归一化NLSE 进行了求解，并模拟了输入为一到三阶双曲正割光脉冲条件下光脉冲传输演变情况。-soliton In optical fiber communications, the optical pulse signals in fiber-optic transmission process will be subject to dispersion, loss and non-linear effects, such as constant evolution and distortion occurs. Pulse to follow the evolution of the law of nonlinear Schrö dinger equation (NLSE). Because NSLE under normal circumstances can not achieve its analytical solution, it normally takes mining use numerical methods to solve, and ultimately attributed to solving normalized NLSE. This article uses the step-by-step Fourier method and normalized NLSE was solved, and analog input for the first-order,second-order and third-order hyperbolic secant optical pulses under the conditions of the evolution of optical pulse transmission. Platform: |
Size: 385024 |
Author:heidian |
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Description: 利用牛顿法数值计算光纤的传播常数，这样利用传播常数与色散的关系，就可以画出光纤的色散曲线-Numerical calculation using Newton' s method the fiber propagation constant, so that the use of the propagation constant and the dispersion relations, we can draw the dispersion curves of optical fiber Platform: |
Size: 1024 |
Author:lu zhangxian |
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Description: 地震波场数值模拟是研究复杂地区地震资料采集处理和解释的有效辅助手段，地震波场数值模拟的主要方法包括两大类，即几何射线法和波动方程法。有限差分法是波动方程法中非常重要的一种方法，它的主要优点是占用内存小，计算速度快。论文采用高阶交错网格差分技术对一阶速度-应力弹性波方程进行数值求解,并对差分方程稳定性条件、频散问题以及边界条件处理进行了讨论。-Numerical simulation of seismic wave is a effective auxiliary means for studying seismic data acquisition, processing and interpretation. The main methods of seismic wave numerical simulation include two major categories, namely, the geometric ray method and the wave equation. Finite difference method, which main advantages are the small memory and computing speed, is one of the very important way for wave equation simulation. Paper uses the high order staggered-grid difference method for numerical calculation of the first order elastic wave equation with velocity and stress. And the stability condition of difference equation, dispersion problems, as well as boundary condition are discussed. Platform: |
Size: 335872 |
Author:徐伟 |
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Description: MRTD算法的2阶和三阶数值色散分析，对需要进一步研究MRTD算法者有进一步的参考价值-2 MRTD algorithms and third-order numerical dispersion analysis, MRTD algorithm require further study by the reference value for further Platform: |
Size: 2048 |
Author:海儿 |
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Description: 应用多极法对折射率导模型光子晶体光纤的色散特性进行了数值模拟。与实验数据
对比，验证了该计算方法的准确性。-Application of multi-pole method for the numerical simulation of photonic crystal fiber dispersion characteristics of the refractive index of the guide model. Compared with the experimental data, verify the accuracy of this calculation method. Platform: |
Size: 202752 |
Author:张江 |
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Description: 硕士论文：粘弹性介质地震波数值模拟。
震波在实际地层介质中传播与在理想的完全弹性介质中传播有许多不同之处，地层的粘滞性会损耗地震波能量，使其振幅衰减并且视频率逐渐降低。地震波的这种能量
衰减和频散，使得不能直接从地震数据上得到准确的地下信息和分辨率更高的图像。实
际的地层更接近于粘弹性介质，本论文主要探讨和研究了粘弹性介质中地震波传播的数
值模拟方法及其衰减规律。
-Thesis: viscoelastic medium seismic wave numerical simulation. The shock wave propagation in the formation medium and ideal perfectly elastic medium spread there are many differences, the viscosity of the strata will loss seismic energy, so that the amplitude attenuation and video rate gradually reduce. This energy of the seismic wave attenuation and dispersion makes accurate subsurface information and higher resolution images can not be obtained directly from the seismic data. Actual formation closer viscoelastic medium, this thesis is to explore and study the numerical simulation of seismic wave propagation in viscoelastic media and its decay law. Platform: |
Size: 1879040 |
Author:基督山小猪 |
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Description: 采用FDTD算法仿真矩型脊波导TM模色散曲线-The finite difference time domain Maxwell equations in the field of time and space differencing. Leapfrog space in the field of electric and magnetic fields alternate calculation, updated by the time field to mimic the changes in the electromagnetic field, to achieve the purpose of numerical calculation. The analysis of the problem to consider the geometric parameters of the object of study, the material parameters, calculation accuracy, computational complexity, computational stability and many other issues. The advantage is the ability to direct simulation of field distribution, the accuracy is relatively high, and is currently one of the more numerical simulation method.This course designe using the finite difference method combined with double-ridged rectangular waveguide boundary conditions to solve the fundamental mode of the waveguide and the first higher order mode dispersion curve. Platform: |
Size: 2048 |
Author:梁家军 |
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Description: 采用全波分析法利用二维有限差分法研究了导带宽度对屏蔽带状线两个最低阶TM模的截止频率的影响，计算结果表明，随着导带宽度减小，最低阶TM模截止频率下降，而次低阶TM模截止频率几乎不变。并对有限差分法中网格粗细对计算结果的影响进行了数值实验，发现网格尺寸的选取需在计算精度和数值色散误差之间折中。-With full-wave analysis of the effects of lead shield width stripline two lowest-order TM mode cutoff frequency method using a two-dimensional finite difference method, the results showed that with the reduced width of the guide, the lowest-order TM mode cutoff frequency decreased, while lower order TM mode cutoff frequency is almost constant. Grid finite difference method and the thickness of the impact on the results of numerical experiments and found that the size of the grid need to choose between accuracy and numerical dispersion errors compromise. Platform: |
Size: 2048 |
Author:苏柳 |
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Description: 这是一个关于FDTD数值色散求解的程序，可以使用，对于初学FDTD的人有点帮助(This is a numerical dispersion on the FDTD solver, you can use, for beginners FDTD people a little help) Platform: |
Size: 44032 |
Author:Littlestar
|
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Description: 可变网格正演模拟，对过渡带有处理，解决了数值频散问题，节省计算时间(Variable grid forward modeling, processing with transition,The problem of numerical dispersion is solved and the calculation time is saved.) Platform: |
Size: 1024 |
Author:小当
|
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Description: 利用MATLAB进行数值计算，得出HE模的色散曲线。(The dispersion curve of HE mode is obtained by numerical calculation by MATLAB.) Platform: |
Size: 1024 |
Author:东柠 |
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Description: 频散曲线求解，利用matlab进行lamb的求解，结果与数值分析方法相比，误差较小，对试验结果具有重要参考价值。通过仿真试验，结果结果比较好。(To solve the dispersion curve, using o solve the dispersion curve, using matlab to solve lamb, the results compared with the numerical analysis method, the error is small, the test results have important reference value. Results through simulation experiment, the result is better.) Platform: |
Size: 14336 |
Author:lxp |
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Search - numerical dispersion