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。
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.
介绍了瞬时频率的概念和瞬态谱的小波包计算方法，并结合时间域模拟信号给出了其时频分布。
The conception of transient frequency and calculation method of wavelet packet are introduced, and time frequency distribution about simulation and actual seismic signals is given.
基于调制域分析，设计了电子产品频率调制参数测试方法。
Based on modulation domain analysis, a frequency modulation parameter testing method is proposed.
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。
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.
本文对原方法的主要改进点是把相位移法与频率域二维滤波结合在一起进行运算。
Improvement to the old method formulated in this paper mainly lies in the combination of phase displacement method with frequency two-dimensional filtering in making operation.
这三种频率域处理方法提取得到了合理的、一致的慢度结果。
These frequency domain processing methods yield reasonable and consistent slowness estimations.
利用频率域模型降阶理论，提出了高阶时滞对象的预测PI (D)控制器两种设计方法。
Based on the model reduction theory in frequency-domain, two predictive PI (d) controller design methods for high order processes with time-delay are proposed.
因此，在频率域滤波的方法越来越引起关注。
So, the filters in frequency domain have attracted more and more attention.
所研究的控制方法均在AC200交流伺服驱动系统的频率域实验模型上做了仿真实验，结果支持了本文分析所得的结论。
All the concerned control strategies are supported with the simulation results that are made on the experimental frequency domain model of the AC200 servo drive system.
本文在对基于频率域的图像融合方法研究的基础上，提出了一种改进的基于形态学小波的多聚焦图像融合方法。
After the research on the image fusion method based on the frequency domain, this paper proposed an improved multi-focus image fusion method based on morphological wavelet.
由于基于循环平稳的阵列处理方法利用了不同信号的循环频率不同这一时域特征，将多个信号在循环频率域进行分离。
Since the performance of cyclostationarity-based array processing methods suffers from severe degradation if there is a small mismatch in the cycle frequency of the signals of interest.
通过对循环谱密度分析方法的特性分析，指出应用循环谱密度分析方法可以在循环频率域有效提取出滚动轴承的冲击故障频率。
Based on the analytic method of cyclic spectrum density, the paper pointed out that the impact frequency could be extracted effectively with the help of scanning cyclic frequency domain.
这种算法是采用了均值量化的方法，把数字水印嵌入图像的离散小波域，可以检测在空间域和频率域的图像失真。
The watermark was embedded in the wavelet domain using the mean quantization method. This method can be used to detect the distortion both in spatial and frequency domain.
本文用谱域方法研究了频率选择表面(FSS)的散射特性。
In this thesis, Spectral method is used to analyse the scattering characteristic of Frequency Selective Surfaces (FSS).
介绍了时域频率稳定性常用的测量方法，并重点介绍了利用调制域分析仪实现时域频率稳定性的测量方法。
This paper indicates the normal testing methods of time domain frequency stability, and focal points out the testing methods of time domain frequency stability with modulation domain analysis.
本文给出了在频率域内计算这三种系数的新方法。
In this paper, a new method for calculating the three kinds of coefficients in the frequency domain is introduced.
利用多级汇水盆地在频率域(或波数域)中的频率差异，通过滤波方法逐级分离，并提取它们。
In this paper, multilevel water gathering basins are separated and extracted automatically with filtering from geographic map based upon their differences in frequency domain.
把时间域信息和频率域信息联系起来进行分析的方法，称为时频分析法。
The method that relates temporal information to spectral information is called temporal frequency analysis.
研究了在频率域提取各种测井信号电序的方法；
Method that extracts the electro sequences from wireline log information in frequency domain has been studied;
本文利用一个适应于表达和处理彩色医学内窥镜图像的颜色空间，分别从空间域和频率域两个方面讨论了该类图像的增强处理方法。
Characteristics of medical endoscopic image were analysed, and a new color space suit to express and process this kind of image were derived from RGB color system.
这两种方法各有特点：频率域法的鲁棒性强，而空间域方法相对精确度更高。
Both types have their own advantages: frequency domain methods have strong robustness, while spatial domain methods have higher accuracy.
这种分析方法提供了时间域与频率域的联合分布信息，清楚地为我们描述了信号频率随时间变化的关系。
As one of the best tools to analyze the non-stationary signals, it shows a good picture in the joint time-frequency domain and makes us know about the change of frequency along with the time clearly.
已经有许多方法在频率和时间域采用反褶积方法。
Many methods have been proposed to employ deconvolution in frequency as well as in time domain.
本文叙述用多变量频率域控制理论设计汽轮发电机组协调控制器的新方法。
This paper describes a new approach to the design of coordinated controller of turbo-generator set using multivariable frequency-response control theory.
传统的图象补偿方法基本上可分为两类，即空间域法和频率域法。
Traditional image compensation methods could mainly divided into two kinds, i. e. space range method and frequency range method.
本研究的优点有三个：一，我们的方法以频率域的方式嵌入浮水印，产生不扩展的分享影像，降低了像素值易受攻击的影响。
There are three advantages of our study. 1. We embedded the watermark by frequency domain and created unexpanded shares, which reduced the impact of pixel modification effectively.
论文首先基于直接数字频率合成技术提出了一种能够在数字域内直接合成出动态信号中时变多普勒频率的信号合成方法。
Firstly, a DDS-based method for digital-domain synthesis of time-varying Doppler frequency in dynamic GPS signal is proposed in this dissertation.
因此，作者将二维扇形滤波方法做了近一步的改善，引入了频率—波数域内带通切饼式滤波方法。
So the author improves the 2-d sector filtering method, introduces the bang-transit and cake-cut filtering method in frequency - wave count area.
提出了一种用边界元法计算频率域人工源三维地形电磁场的数值模拟方法。
We propose a numerical method using boundary element to model the electromagnetic filed induced by artificial source in the frequency domain with 3-D topography.
提出了一种用边界元法计算频率域人工源三维地形电磁场的数值模拟方法。
We propose a numerical method using boundary element to model the electromagnetic filed induced by artificial source in the frequency domain with 3-D topography.
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