The finite-difference frequency-domain method with multifrontal algorithm is presented for two-dimensional cylinder scattering problems.
引入多波前算法，提出了结合频域有限差分法分析二维柱体的电磁散射问题。
The finite-difference frequency-domain method with preconditioned conjugate-gradient technique is presented for two-dimensional cylinder scattering problems.
本文引入预条件共轭梯度法，提出了结合频域有限差分法结合分析二维柱体的电磁散射问题。
Although the filtering method in frequency domain can solve the time variant filtering problem based on Fourier transform, the method may appear a false anomaly in conjunct part between Windows.
频率域滤波方法虽然可解决时变滤波问题，但这种方法是基于傅里叶变换，在窗口与窗口之间的接合部位会出现假异常。
The invention relates to a method and a device for demodulating a frequency domain fiber grating sensing network.
本发明涉及一种频域光纤光栅传感网络解调的方法和设备。
The main analytical method of unsteady flow in pipelines includes frequency domain analysis and time domain analysis.
管道中非稳定流动的分析方法主要有频域法和时域法。
Time frequency analysis method is used to analyze the time domain and frequency domain of seismic waves at the same time according to the principle of wavelet transformation.
时频分析方法是利用小波变换原理，从地震波的时间域和频率域同时对其作出分析。
The dissertation also presents the sensitivity of time domain method and frequency domain method to different kinds of error.
分析了时域法、频域法对不同类型误差的敏感程度。
The current widely used methods of seismic response analysis for soil layers in engineering are equivalent linearization frequency domain method which is based on FFT and iterative method.
工程上广泛应用的现行土层地震反应分析方法即为借助快速傅里叶变换和迭代法的等效线性化频域方法。
Abstract: Series leading correction, in the frequency domain of the system design, is an indirect method.
摘要：串联超前校正，是在频域内进行的系统设计，是一种间接地设计方法。
Since the flight test data are of time domain, it needs to be converted into frequency domain by FFT method. Then it can be used to identify the system.
由于飞行试验数据是时域数据，使用这种方法需要使用FFT的方法将实测的时域数据转换成频域数据后再进行辨识。
Based on modulation domain analysis, a frequency modulation parameter testing method is proposed.
基于调制域分析，设计了电子产品频率调制参数测试方法。
Then we prove that the exponential stability of this system by frequency domain multiplier method.
其次应用频域乘子方法得到了闭环系统的指数镇定。
The method of frequency domain is used to research the random responses of linear system on vehicle dynamics.
运用频域法对线性汽车动力学系统的随机响应进行研究。
The paper presents a method of motion curve frequency domain filtering in Omni-directional M-mode echocardiography images based on Discrete Fourier Transform (DFT).
介绍一种基于离散傅里叶变换(DFT)的全方向M型超声心动图运动曲线频域滤波技术。
This article introduces the principle of digital filter in frequency domain and presents method to realize it on 7T17S Signal Processor.
文中介绍了频域数字滤波的原理，提出了在7T17S信号处理机上实现频域数字滤波的方法。
Based on the idea of frequency domain subspace, a multipath delay estimating method for aperiodic spreading system is proposed.
基于频域子空间思想，给出了一种适用于非周期扩频系统的多径时延估计方法。
A frequency domain method for predicting the fatigue life of notched specimens under random vibration loading is presented.
提出了一个考虑应力集中和疲劳极限影响的缺口件频域随机振动疲劳寿命估算方法。
The frequency domain identification method of the storehouse structure parameters is presented in the paper.
本文提出了一种贮仓结构参数的频域识别方法。
A frequency domain characterization method using low frequency ultrasound is put forward to estimate parameters of ultra thin elastic layers, such as: the sound velocity, thickness and density.
本文提出一种定量无损估计超薄弹性层声速、厚度和密度参数的低频超声波频域定征方法。
The time domain integral equation (TDIE) method is one of the important methods in electromagnetic numerical simulations for several advantages over conventional method in frequency domain.
相对于频域方法而言，时域积分方程法有这许多优势，因此，它是计算电磁学数值方法中一个重要的方法。
The accumulated fatigue damage was calculated in frequency domain by equivalent stress method and equivalent narrow band method respectively.
在频域内分别用等效应力法和等效窄带法计算了累积损伤。
The stability, static error, and convergence rate are analyzed, and a frequency domain design method is proposed.
分析了系统稳定性、稳态误差和收敛速度，并在此基础上提出了一种重复控制器频域设计方法。
A new time and frequency synchronization method based on frequency domain correlation for an Orthogonal frequency Division Multiplexing (OFDM) system is presented.
该文根据频域相关的原理，提出了一种新的用于无线移动信道下的正交频分复用(OFDM)系统的时频同步算法。
In Chapter two, the frequency domain method of financial volatility analysis is studied.
第二章研究金融波动的频域分析方法。
Aiming at the phase ambiguity of the blind channel estimation in frequency domain, a blind channel estimation method in frequency domain based on dissymmetrical modulation constellation was proposed.
针对频域信道盲估计的相位模糊问题，提出了基于非对称调制星座的频域信道盲估计方法。
Based on the frequency-domain model of synthesizer, the method can accurately predict the phase noise of the divider and its influence to the phase noise of synthesizer.
这种方法基于频率综合器的频域模型，能比较准确地预测分频器的相位噪声和它对整个频率综合器相位噪声的影响。
Then, an improved method by combining the time domain method and frequency domain method is provided.
并就其中的时域法和频域法进行了改进，将二者结合起来，使之更有效地对速度进行估计。
Emphasis in the discussion is put on presentation of finite element method in frequency domain, in which transmitting boundary has been adopted.
文中重点讨论了具有工程实用价值的引入了透射边界的频域有限元解法。
Based on observed signals analysis and comparison in time - domain and frequency -domain, the method of distinguishing interfere signals and abnormal electromagnetic radiation signals is given.
基于对观测信号的时域、频域分析的比较，给出了干扰信号与异常电磁辐射信号的判别方法。
Based on observed signals analysis and comparison in time - domain and frequency -domain, the method of distinguishing interfere signals and abnormal electromagnetic radiation signals is given.
基于对观测信号的时域、频域分析的比较，给出了干扰信号与异常电磁辐射信号的判别方法。
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