wave field extrapolation中文是什么意思

• 波场外推
• 波场延拓

• "wave"中文翻译    n. 1.波浪；碎浪； 〔the wave(s)〕 〔诗 ...
• "field"中文翻译    n. 1.原野，旷野；(海、空、冰雪等的)茫茫一片。 2 ...
• "two-dimension wave extrapolation" 中文翻译 :    二维波场外推
• "ship magnetic field depth extrapolation" 中文翻译 :    磁场深度换算
• "field wave" 中文翻译 :    场波; 激励波; 励磁波
• "wave field" 中文翻译 :    波场; 波浪场
• "extrapolation" 中文翻译 :    推演; 外推，外推法; 外推法；外插法; 外推法归纳; 外延法
• "extrapolation extrapolation" 中文翻译 :    外插
• "coherent wave field" 中文翻译 :    相干波场
• "compressional wave field" 中文翻译 :    压缩波场
• "diffracted wave field" 中文翻译 :    绕射波场
• "diverging spherical wave field" 中文翻译 :    发散球面波场
• "field frequency square wave" 中文翻译 :    场频方波
• "plane-wave field" 中文翻译 :    平面波场
• "quantum mechanics of wave field" 中文翻译 :    波场量子力学
• "radio wave field strength" 中文翻译 :    电波场强
• "reference wave field" 中文翻译 :    参考波场
• "reflected wave field" 中文翻译 :    反射波场
• "scattered wave field" 中文翻译 :    散射波场
• "seismic wave field" 中文翻译 :    地震波场
• "short wave field strength" 中文翻译 :    短波场强
• "standing wave field" 中文翻译 :    驻波场
• "standing-wave field" 中文翻译 :    驻波场
• "transverse magnetic field wave" 中文翻译 :    tm波
• "traveling-wave field" 中文翻译 :    行波场

• Advanced mathematical technologies , especially the newly developed wavelet transform and the frame theory , provide a solid foundation for such an effort . the ray - theory based beam - summation method , such as the complex source - generated beam and the gaussian beam methods , and the local phase - space domain ( beamlet domain ) wave field extrapolation methods employing windowed fourier transform ( wft ) or wavelet transform are proposed consequently
  基于射线理论的高频渐近射束(复射束、高斯射束)叠加方法，以窗口富里叶变换( wft )以及小波变换为基础的局部相位-空间域(小波束域)波场外推方法等相继产生。
• One is the non - orthogonal gabor - daubechies frame , or g - d frame , a complete set of discrete window fourier functions which are constructed by space - shifting and harmonically modulating a gaussian window . although a g - d frame is not an orthogonal basis , it bears considerable advantages for the study of physical problems , especially those related to the wave field extrapolation , due to the optimal localization properties of the gaussian window function under the heisenberg uncertainty principle
  其一为将高斯窗函数经平移和调制而构成的一组窗口富里叶框架( gabor - daubechies框架，或g - d框架)基本函数，另一种为在富里叶分析和小波包理论基础上发展起来的局部余弦基函数。
• This conversion is based on the analytic expression of sonic and elastic wave equation , and use the different wave field extrapolation , which is initially used in seismic migration and forward modeling . this paper introduces the easy and efficient finite - difference method to realize the conversion by comparing three different methods
  论文经过对三种常规波场延拓方法( kirchhoff积分法、频率波数域法和有限差分法)优缺点的比较，采用了简单易用的有限差分方法来实现这种转换。
• In this thesis , we follow the idea of the beamlet - domain wave field extrapolation methods to construct localized propagators . through comparative study of signal decomposition efficiency using different representation schemes , we select two groups of basic functions with simple expressions and good localization properties for wave field decomposition , propagation and imaging
  本论文通过对wft 、小波基、小波包，以及相关的框架理论等的分析比较，选择了两组形式简单，且具有适宜于波场外推特性的基本函数集合来进行波场分解、传播及偏移成像问题的研究。
• The other is the local cosine bases developed as a kind of orthogonal basis based on the fourier analysis and wavelet - packet theory . in this thesis , theoretical analysis and numerical applications are mainly focused on the beamlet - domain wave field extrapolation using g - d frame propagators . the whole thesis consists of six chapters
  通过对具体信号的分析，对不同变换方法的信号表示效率进行了对比，并总结了g - d框架及对其进行尺度扩展组成的gabor函数族在应用于波场相关的研究中时，优于其它正交分解方法的特性。
• From 1920s up to now , various techniques and methods for wave field decomposition , propagation and migration / imaging have been well developed , such as the kirchhoff asymptotic method , frequency - wavenumber domain phase - shift and phase - shift - plus - interpolation methods , and the one - way wave equation based phase - screen and generalized screen methods , etc . wave field extrapolation in these methods is implemented based on the expansion of the wave field by sets of basic functions like spatial fourier harmonies , modes , and green ' s functions
  自上个世纪二十年代至今，波场分解、传播与偏移成像技术经历了将近一个世纪的发展，形成了多种不同的方法，如kirchhoff波动方程高频近似解方法，频率-波数域的相移( phase - shift )方法和相移-内插( pspi )方法，以及在混合域中基于单向波动方程的相位屏、广义屏方法等。