流動斑點 的英文怎麼說

中文拼音 [liúdòngbāndiǎn]
流動斑點 英文
flow mark
  • 流 : Ⅰ動1 （液體移動; 流動） flow 2 （移動不定） drift; move; wander 3 （流傳; 傳播） spread 4 （向壞...
  • 斑 : Ⅰ名詞（斑點; 斑紋; 污點; 瑕疵） spot; speck; speckle; stripe; stain Ⅱ形容詞（有斑點或斑紋的） spo...
  • 點 : Ⅰ名詞1 （液體的小滴） drop （of liquid） 2 （細小的痕跡） spot; dot; speck 3 （漢字的筆畫「、」）...
  • 流動 : 1. （液體或氣體移動） flow; run; circulate 2. （經常變換位置） going from place to place; on the move; mobile
  • 斑點 : spot; stain; speckle; freckle; fleck; dot; splodge; splotch; burl; flick; macula; measles; tache
  1. The fourth - order explicit upwind - biased compact difference schemes are used in the spatial discretization of the nonlinear convection terms. these difference schemes can be used in all computational region including the boundary neighborhood, and can overcome the difficulty not adapting simultaneously in the boundary neighborhood for general three - dimensional fourth - order central difference schemes, and improve computational stability a nd resolution. the compact difference equations with high accuracy and resolution for solving the incompressible n - s equations and perturbation equations are composed of these compact difference schemes, and provides an effective numerical method for the investigations of the turbulent spots and coherent structures

    文中發展了四階時間分裂法用於navier - stokes方程及其擾動方程的時間離散；對分裂得出的關于壓力的poisson方程和關于速度的helmholtz方程，建立三維耦合四階緊致迎風差分格式；這些格式適用於包括鄰近邊界點在內的計算區域，克服了三維各自用四階中心差分格式離散不適用於邊界鄰域的困難，並提高了穩定性和解析度，用這些格式分別組成了數值求解navier - stokes方程及其擾動方程的高精度、高解析度的緊致差分方程組，為湍斑及湍流相干結構的研究提供了有效的數值方法。
  2. Wavelet transform also has time - frequency orienting ability and realize the abruption of the balanced and unbalanced component in images. this paper, based on particularly expatiating information characters in sar image data, will investigate compression algorithm applying for sar images by analyzing embedded encoding algorithms using wavelet theory. using several standards to evaluate our method and spiht algorithm, it is clear that our method outgoes spiht algorithm

    本文在對sar圖像數據的信息特徵進行了詳細闡述的基礎上，利用小波理論分析近年來比較流行嵌入式壓縮編碼方法，來研究適用於sar圖像的壓縮方法，取得以下研究成果： （ 1 ）考慮到sar圖像的動態范圍比較大，而且sar圖像斑點噪聲模型大部分是乘性噪聲，先對其進行對數變換，既可以縮小數據的動態范圍，也可以把乘性噪聲轉變成加性噪聲模型。
分享友人
分享到 Line

分享到臉書