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时间域     
相关语句
  time domain
    Principles of Radon transformation methods, including linear Radon transform in time domain, least square Radon transformation and high-resolution Radon transformation in frequency domain are discussed.
    讨论了时间域线性Radon变换、频率域最小平方Radon变换和频率域高分辨率Radon变换等方法的基本原理。
短句来源
    Suppression of single-frequency interference wave in time domain.
    时间域单频干扰波的压制
短句来源
    FULL WAVEFIELD INVERSION OF ANISOTROPIC ELASTIC PARAMETERS IN THE TIME DOMAIN
    时间域全波场各向异性弹性参数反演
短句来源
    Frequency attributes characters of seismic traces in time domain and division of stratigraphic sequence.
    地震道时间域频率属性特征和地层层序划分
短句来源
    THE RECOGNITION AND SUPPRESSION OF SINGLE FREQUENCY INTERFERENCE WAVE IN TIME DOMAIN
    时间域单频干扰波的识别与压制
短句来源
更多       
  time-domain
    Method of Full Migration of Pre-stack Time-domain and Its Application
    叠前时间域全偏移处理方法与应用
短句来源
    TIME-DOMAIN AND FREQUENCY-DOMAIN THREE DIMENSIONAL TENSOR GREEN'S FUNCTION IN A HOMOGENEOUS CONDUCTIVE HALF SPACE AND ITS APPLICATION
    均匀导电半空间中频率域和时间域三维电张量格林函数及应用
短句来源
    Time-domain modeling of constant-Q seismic waves using fractional derivatives
    应用分数阶微分对地震波稳恒Q值的时间域模拟
短句来源
    Recently Transient Electromagnetic Method (TEM), as a kind of time-domain electromagnetic prospecting approaches, has experienced a period of rapid development and been widely applied.
    瞬变电磁法(简称TEM法)是近年来发展很快并得到广泛应用的一种时间域电磁勘探方法。
短句来源
    in 1993, afinite-difference, time-domain solution to Maxwell's equation has been developedfor a 3-D subsurface and topography .
    (1993)算法的基础上,针对地形起伏的三维地电模型,提出了 Maxwell 微分方程组的一种时间域有限差分解法。
短句来源
更多       
  in time domain
    Principles of Radon transformation methods, including linear Radon transform in time domain, least square Radon transformation and high-resolution Radon transformation in frequency domain are discussed.
    讨论了时间域线性Radon变换、频率域最小平方Radon变换和频率域高分辨率Radon变换等方法的基本原理。
短句来源
    Suppression of single-frequency interference wave in time domain.
    时间域单频干扰波的压制
短句来源
    Frequency attributes characters of seismic traces in time domain and division of stratigraphic sequence.
    地震道时间域频率属性特征和地层层序划分
短句来源
    THE RECOGNITION AND SUPPRESSION OF SINGLE FREQUENCY INTERFERENCE WAVE IN TIME DOMAIN
    时间域单频干扰波的识别与压制
短句来源
    The wavelet in depth domain is extracted based on multitrace statistical extracting wavelet in time domain. Seismic decovolution profiles in depth domain are been compared with one in time domain.
    同时在时间域多道统计提取子波的基础上提取深度域地震子波,将提取得到子波进行深度域反褶积,并与时间域反褶积得到的地震剖面相比较。
短句来源
更多       
  the time domain
    FULL WAVEFIELD INVERSION OF ANISOTROPIC ELASTIC PARAMETERS IN THE TIME DOMAIN
    时间域全波场各向异性弹性参数反演
短句来源
    (5) find the time domain wavelet by solving the linear matrix equation.
    (5)在较为准确地求得子波的相位谱后利用线性方程组求得时间域子波。
短句来源
    The method of simultaneous inversion of multiple echo trains(SIMET) obtains fluids T 2 distribution and volume by using evolution matrix in the time domain.
    多回波串同时反演 (SIMET)评价方法是在时间域应用矩阵变换对CPMG回波串数据进行数值处理 ,得到油、气、水的固有T2 谱分布和油、气、水体积。
短句来源
    Starting with the concept of the resolution of the hi-resolution seismic survey, systematicdiscussion on the relationship between the resolution and the signal-noise ratio and bandwidthand the effects on resolution is presented. Principle parameters and their mutual relation thatinfluence the resolution are analyzed from the time domain and the frequency domain,resulting in that the effective bandwidth and the center frequency are two controlling factorsto increase the resolution.
    本文从高分辨率地震勘探分辨率的概念入手,对分辨率和信噪比与带宽的关系以及影响分辨率的因素作了系统性的论述,从时间域和频率域分析了影响分辨率的主要参数及其相互关系,得出提高分辨率主要是提高有效带宽和中心频率的结论。
短句来源
    In this paper, the binary sequence is constructed based on the time domain expression of pseudo-random multi-frequency waveform.
    本文以伪随机多频波在时间域上的表达式为基础,构建了产生伪随机多频波的二进制序列。
短句来源
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      time domain
    Our proofs proceed in the time domain and allow us to represent each solution regardless of the spectral radius of P(0):=2-s∑cα, which has been a difficulty in previous investigations of this nature.
          
    A Time Domain Characterization of the Fine Local Regularity of Functions
          
    In this paper, the global and local linear independence of any compactly supported distributions by using time domain spaces, and of refinable vectors by invariant linear spaces are investigated.
          
    For the finite-difference time domain (FDTD) method, the electromagnetic scattering problem, which requires the characteristic structure size to be much smaller than the wavelength of the exciting source, is still a challenge.
          
    The discrete spectrum of the field after continuation is obtained from difference methods for Maxwell's curl equations in frequency-domain, and the time domain solution of the original problem is derived from their inverse Fourier transform.
          
    更多          
      time-domain
    Hybrid method of combined difference and spectrum for time-domain maxwell's equations
          
    To circumvent this difficulty, this paper presents a novel hybrid numerical technique of combined difference and spectrum for time-domain Maxwell's equations.
          
    Although the structure of frequency shift filter is more complicated than the time-domain filter, it uses both time correlations and frequency spectrum correlations so it can achieve better performances on separating the overlapping signals.
          
    The transient pulse signal fidelity has also been investigated by finite-difference time-domain (FDTD) method.
          
    The modified TEM horn antenna with distributed resistor load is presented in this paper, and the radiation properties of the antenna with the shields and absorbers are studied through the three-dimensional finite-difference time-domain (FDTD) scheme.
          
    更多          
      in time domain
    A super-element approach for structural identification in time domain
          
    The wind excitations of the system are the buffeting and self-excited forces simulated in time domain using measured aerodynamic coefficients and flutter derivatives.
          
    Searching-and-averaging method of underdetermined blind speech signal separation in time domain
          
    A novel searching-and-averaging method in time domain (SAMTD) is proposed.
          
    Bypassing the disadvantages of traditional clustering (e.g., K-means or potential-function clustering), the durative-sparsity of a speech signal in time domain is used.
          
    更多          
      the time domain
    Our proofs proceed in the time domain and allow us to represent each solution regardless of the spectral radius of P(0):=2-s∑cα, which has been a difficulty in previous investigations of this nature.
          
    The discrete spectrum of the field after continuation is obtained from difference methods for Maxwell's curl equations in frequency-domain, and the time domain solution of the original problem is derived from their inverse Fourier transform.
          
    A super-element approach is proposed in this study to identify the structural parameters of a large-scale structure in the time domain.
          
    The natural excitation technique and the eigensystem realization algorithm were combined to identify the modal parameters in the time domain of a structure excited by simulated ambient vibrations.
          
    This procedure is highly efficient in analyzing dynamic structure-foundation interaction problems in the time domain.
          
    更多          


    In this paper, 80 magnetic storms during 1973-1977 are analyzed by means of the Fast Fourier Transform (FFT). The data were selected from the three observatories of Beijing, Qing Guang and Chang Li.It is get the general nature of the magnetic storm spectral components by the dispersion formula of FFT in some local areas. It is find the spectral features are nearly the same at the three observatories. The storm spectral amplitude decreases with increasing frequenecy and are linear in the logarithmic coordinate....

    In this paper, 80 magnetic storms during 1973-1977 are analyzed by means of the Fast Fourier Transform (FFT). The data were selected from the three observatories of Beijing, Qing Guang and Chang Li.It is get the general nature of the magnetic storm spectral components by the dispersion formula of FFT in some local areas. It is find the spectral features are nearly the same at the three observatories. The storm spectral amplitude decreases with increasing frequenecy and are linear in the logarithmic coordinate. This linear trend is obvious especially for the period range from 0.5 hours to 6.8 hours.It is calculated the spectral slopes b in this period range by means of the weighted least square fitting method, and the storm energy utilizing the parsval energy equation. All the spectral slopes of magnetic storm are close to each other. So the energy partitioning law for frequency of storm spectra is consistent.The above result is of value to a further study of the physical mechanism of magnetic storms, the physical nature of storm source, and the solar-terrestical relationship.

    本文利用北京、青光、昌黎地磁台1973-1977年80个磁暴资料,借助快速付里叶变换的方法,把时间域里的磁暴转化到频率域中,以频谱的形式表现出来,用频率为参量把不同类型的磁暴进行了相互间的比较和分析;研究了磁暴在频率域中的特性.得出了局部地区磁暴频谱的一般特征;并发现在周期0.5-6.8小时范围内,磁暴能量具有恒定的分配因子.这对探讨磁暴源的物理特性以及日地关系的研究都是有意义的.

    Polarization analysis of three-component seismic records is a useful means for studying seismic waves, and is widely used to investigate the anisotropy and lateral heterogeneity of the earth medium.This paper presents a computer program POLALYS which,besides some data processing routines, performs polarization analysis by the single value decomposition (SVD) method in time or frequency domain, as well as by the conventional particle motion diagrams. The analyses of surface waves along four paths within continental...

    Polarization analysis of three-component seismic records is a useful means for studying seismic waves, and is widely used to investigate the anisotropy and lateral heterogeneity of the earth medium.This paper presents a computer program POLALYS which,besides some data processing routines, performs polarization analysis by the single value decomposition (SVD) method in time or frequency domain, as well as by the conventional particle motion diagrams. The analyses of surface waves along four paths within continental China are shown in this paper which clearly demonstrate the effect of laterally heterogeneous velocity structure on the propagation of the waves.

    利用三分量地震记录进行偏振分析可以研究地球介质的各向异性和横向不均匀性.本文介绍偏振分析程序POLALYS在面波研究中的应用.除了提供一些常规的数据处理技术外,该程序利用时间域或频率域中的奇异值分解法(SVD)和传统的质点轨迹图方法进行地震波的偏振分析.分析了沿4条不同路径传播的地震面波,从中可清楚地看出速度结构的横向不均匀性对面波传播的影响.

    The FDEM responses of 3D body are calculated by integral equation method, which can be changed into TDEM responses by inverse cosine tranform. To explain the sign reversals of TDEM responses in late time stage, Cole-Cole model which describes the character of frequency-diversity of resistivity of polarizable body are introduced into the direct calculation. It has been shown that IP effects on TDEM field are influenced by the the geometric, electrical and IP parameters.

    利用并矢格林函数理论和积分方程方法计算两层大地中三维异常体的频率域电磁响应,并利用反余弦变换方法将其转换为时间域电磁响应.为了解释时间域电磁响应晚期段经常出现的场值变号现象,将描述电阻率频散特征的Cole-Cole模型引入到正演计算之中.计算表明,时间域电磁法的激电效应(IP)特征不仅受异常体的激电及电阻率参数的影响,而且受异常体的几何参数影响.

     
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