beamlet 中文意思是什麼
beamlet
解釋
細光束-
A new multiscale curve coder of binary multimedia based on beamlet
的多尺度二值多媒體信息曲線編碼器 -
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
基於射線理論的高頻漸近射束（復射束、高斯射束）疊加方法，以窗口富里葉變換（ wft ）以及小波變換為基礎的局部相位-空間域（小波束域）波場外推方法等相繼產生。 -
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
本論文通過對wft 、小波基、小波包，以及相關的框架理論等的分析比較，選擇了兩組形式簡單，且具有適宜於波場外推特性的基本函數集合來進行波場分解、傳播及偏移成像問題的研究。 -
Line detection based on beamlet transform
變換的線特徵檢測 -
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
通過對具體信號的分析，對不同變換方法的信號表示效率進行了對比，並總結了g - d框架及對其進行尺度擴展組成的gabor函數族在應用於波場相關的研究中時，優于其它正交分解方法的特性。
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