基于有限差分光束传播法，对侧边抛磨光纤的光传输特性进行了模拟计算。
Based on beam propagation method, analysis and simulation on optical propagation characteristics of side-polished fiber have been made.
时域有限差分（FDTD）算法被广泛地用于模拟电磁场的传播。
The finite-different time-domain(FDTD) method has been widely used to simulate the transient solutions of electromagnetic wave propagation.
这个时间差依赖于信号在星际介质中传播的路程：路程越长，时间差越大。
This time-lag depends on the distance the signal has traveled through the interstellar medium: the longer the distance, the greater the time lag.
如何做，取决于您对差分阻抗，长度(传播时间)匹配和精确应用的要求。
How you do it depends on what your requirements are for differential impedance, length (propagation time) matching and exact application.
为了快速准确的找到电力电缆故障所发生的位置，研究了声磁传播时间差法测寻电力电缆故障点。
In order to locate power cable fault fast and accurately, the acoustic propagation time measurement was developed to detect cable fault.
流行性霍乱传播的一种普遍方式是卫生条件差。
这样的话我们就无法知道信号的准确时间差，也不能重建外星人传播的信号了。
Not knowing the distance, we don't know the time-lag in the signals, and cannot reconstruct the aliens' transmission.
应用时域有限差分（FDTD）方法分析甚低频在地电离层波导中的传播特性。
The propagation characteristic of the VLF in the earth-ionosphere waveguide is analyzed by applying the FDTD method.
对于非线性最小二乘平差参数的方差协方差传播的研究，必须与非线性最小二乘平差的研究同步。
The research of variance covariance propagation of nonlinear least squares adjusted parameters must keep in step with the development of nonlinear least squares adjustment in this area.
本文介绍了基于广角隐式有限差分单程波传播算子的起伏地表叠前深度偏移方法，并对SEG山前带推覆构造模型进行了检验。
The paper introduced the prestack depth migration from relief surface based on implicit wide-angle finite-difference one-way propagation operator and used SEG piedmont nappe structure model for test.
回声测深仪是用来测量水深的一种声学测量设备，其以水中超声波的传播速度为确定条件，利用发射波与反射回波时间差来测量水深。
Echo Sounder is a kind of acoustic measuring depth equipment, which can measure depth with the time between transmitted wave and echo on condition in which the speed of ultrasonic is fixed.
为此，本文重点完成了利用三维有限差分束传播法求解条形波导中场分布的计算程序的编写和调试。
So the main work in this dissertation is compiling and debugging the program for solving the field distribution in channel waveguides using three-dimensional finite-difference beam propagation method.
对深部矿柱在承受高静载应力时的动力扰动力学模型进行应力波传播力学响应分析，采用FLAC3D有限差分程序对深部开采圆形矿柱进行高应力下动力扰动数值计算。
By using an explicit finite difference program FLAC3D, a model of numerical calculation is established for a deep mining pillar with dynamic disturbance under high stress.
以灰色系统理论为基础，根据相应数据用灰色模型建立了SARS传播规律的残差修正模型并对SARS传播的规律进行模拟检验和预测。
Based on gray system theory and according to relevant data, this paper USES the gray model to stimulate and forecast the law of SARS spread.
首先用有限差分光束传播法模拟了器件的光波传播特性，然后进行了初步的实验验证。
The wave propagation characteristics of the splitter are numerically simulated by the finite difference beam propagation method and experimentally investigated.
笔者利用有限差分软件FLAC3D，对单层介质半无限大体和三维路基体的瑞利波传播特性以及频散曲线进行了数值模拟分析；
Rayleigh wave propagation and dispersive curve in single layers semi-infinite space model and three dimensional road embankment are studied comprehensively by using finite difference software FLAC3D.
有限差分束传播法则能够准确地模拟波导的性能。
The finite difference beam propagation method(FD-BPM) can simulate the performance of the waveguide accurately.
结论反向传播网络在函数逼近方面差的原因是激励函数的全局性、隐层结点数目的不确定性。
Conclusion Because of the inspirit function's globaling and the number of the Hidden Layer'node uncertainty the BPNN was not done well.
CRAB株引起的感染预后差，必须采取有效的感染控制措施和抗菌药物的干预政策以控制耐药株的传播。
The nosocomial infection caused by CRAB had poor prognosis. Effective infection control measure and antimicrobial intervention policy should be conducted in order to control the outbreak of CRAB.
最后，利用高阶的交错网格有限差分方法，我们模拟了地震波在具有随机分布裂缝岩石中的传播特征。
Numerical modeling results for seismic wave propagating in rocks with random dis- tributed fractures using a staggered high-order finite-difference (SHOFD) are also presented.
保偏光纤内部的高双折射，使得其内部传播的偏振主模和耦合模之间存在着一定大小的光程差。
The main polarization mode and coupling mode in PM fiber has some optical path difference because of internal birefringence.
在众多的波导模拟工具中变分有效折射率法和有限差分束传播法都是实用性非常强的。
Variational-Effective index method and Finite difference beam propagation method(FD-BPM) are both practicable waveguide simulation tools.
文中涉及粘弹性力学理论、地震波传播理论、有限差分理论、波场正演模拟技术等相关知识。
Many correlative techniques are involved, including seismic viscoelasticity, seismic wave theory, finite-difference and wave field modeling.
共模干扰和差模干扰是传导emi的两种传导形式，本文从产生源、传播路径方面分别对共模干扰和差模干扰进行了论述。
CM and DM are the two conducted form of the conducted EMI, this paper discuss the CM and DM in the noises.
实际计算表明，本文所编写的有限差分束传播法和掺铒波导增益特性计算程序，均能给出合理的计算结果。
Calculating on practical problems shows that both the finite-difference beam propagation method and the gain character programs can give reasonable results.
为了克服由多径传播造成的相移失真难题(特别是在HF链路里)，调制采用差分相移键控(DPSK)来完成。
To cope with the problem of phase shifts caused by different propagation paths (especially in HF links), the modulation is done in differential phase shift keying (DPSK).
提出一种新的三维空间不规则网格有限差分方法，模拟具有地形构造的非均匀各向异性介质中弹性波传播过程。
This paper presents a new 3d finite-difference (FD) method using spatially irregular grids to simulate elastic wave propagation in heterogeneous anisotropic media with topographic structures.
提出一种新的三维空间不规则网格有限差分方法，模拟具有地形构造的非均匀各向异性介质中弹性波传播过程。
This paper presents a new 3d finite-difference (FD) method using spatially irregular grids to simulate elastic wave propagation in heterogeneous anisotropic media with topographic structures.
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