approximation technique 中文意思是什麼

approximation technique 解釋
近似計演算法
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  • technique : n. 1. （專門）技術；（藝術上的）技巧，技能。2. 手法〈如畫法，演奏法等〉。3. 方法。
  1. The thesis analyzes the transmitting characteristic of the uwa channel, derives the propagation losses, eigenrays and channel impulse responses of uwa channel by use of the kraken normal wave mode and the ray trace algorithm based on velocity - depth curvilinear profile approximation. based on the analysis, a scheme of auto - replying lduwarc system by means of spread spectrum technique has been designed

    論文首先分析了遠程聲遙控通道傳輸特性，分別利用kraken簡正波和射線跟蹤模型對深海和淺海水聲通道的傳輸特性進行分析，對通道的多徑結構、衰落和環境噪聲進行了計算，並在此基礎上設計了基於擴頻技術的自主應答式遠程聲遙控系統方案。
  2. The work of the paper mainly includes : ( 1 ) present a model for measuring the similarity between two hydrological time series. in this model, we adopt an intuitive dimensionality reduction technique for hydrological time series which is called piecewise average approximation ( paa )

    主要工作包括： （ 1 ）提出了適合水文時間序列數據特點的相似性模型，採用簡單直觀的等時間間隔序列分段平均值技術（ paa ）作為水文時間序列降維方法。
  3. In computation of swept volume approximation, an improved technique to generate the swept volume approximation for arbitrary meshes is presented by introducing generator simplification and path resample using frenet moving frames along the discreted sweeping trajectory. other steps, such as a directed distance field computation on a uniform grid based on the hardware accelerated computation technique and iso - surface extraction using marching cubes algorithm, are also included in this algorithm. in addition, the simplification scheme and smoothing technique are applied to the swept volume generated from iso - surface extraction

    本文的主要貢獻在於：在掃描體逼近計算方面，在原有任意多邊形網格模型沿任意路徑運動生成掃描體逼近演算法的基礎上，提出了加入對掃描母體簡化的預處理和用活動標架對掃描路徑進行重采樣等過程，演算法的其它過程還包括：計算掃描體中幾何基元的排列，用硬體加速構造無符號的有向距離場，將無符號距離場轉化為有符號距離場，從有符號有向距離場提取等值面等。
  4. The new algorithm starts from an initial estimate which is based on the hough transform, and a rectangular window is centered using the current line approximation, and a new line estimation is generated by making a total least squares fit through the pixels contained within the window. this is repeated until convergence is reached. lastly, we have suggested a new technique which may recover the motion and structure parameters of a moving object by using of 21 optical flow lines based on the optical flow fields of the feature line this thesis is the project supported by aeronautical foundation science ( no. 99f53065 ) and research center of measuring and testing technologies, and control engineering in nanchang institute of aeronautical technology ( no. 2001 - 15 )

    演算法的思路是：首先，在小區域內運用霍夫變換確定直線的初始值；其次，以直線的初始值所對應的直線為中心線，建立一個矩形框；最後，利用矩形框內所包含的邊緣點數據不斷地迭代直至收斂，從而達到進一步修正直線的坐標參數；本文基於特徵直線的光流場，即線流場，建立了一種利用21條光流線確定空間三維物體旋轉運動參數、平移運動參數以及對應的空間直線坐標的線性演算法。
  5. Double variable technique is used by kruzkov in 70 ' s to obtain the existence, uniqueness and regularity of entropy solution to ( 0. 2. 1 ) for the scalar case, especially the contractive properity of entropy solution. kuznetsov applied this technique to approximation of scalar hyperbolic conservation laws ( 0. 2. 1 ) in 1976

    Kruzkov 481在70年代用雙變t技巧（ doublevariableteehnique ）解決了多維單個雙曲守恆律（ 0 . 1 . 1 ）的摘解的適定性問題，即嫡解的存在性，唯一性及正規性結果，特別摘解的ll收縮性質
  6. A smoothing technique is combined with optimum approximation and finite element piece - wise interpolation in the method, it can simultaneously process measured vector components, imp ro ve smoothing capability of solution, space composed of original discrete points and increase the accuracy of the solution, especialy its derivatives

    該方法結合最佳逼近、有限元分片插值與光順技巧，對測量向量各獨立分量進行處理，改善了原離散點構成的解空間的光滑性，提高了解尤其是導數場的精度，在測量區域內再現了光順向量函數及連續的導數。
  7. In order to improve the efficiency, the fast far field approximation ( faffa ) and a novel local iteration technique based on dynamic coupling region controlling are applied to the original fipwa

    為進一步提高求解效率，將快速遠場近似與之混合;採用一種新型的動態控制耦合半徑的局部迭代技術。
  8. But the complex analytical signal ( cas ) theory can erase this spatial sigu - larity. in this section, gauss, hyperbolic and lorentz pulsed gaussian beam have been derived and compared svea and cas solution by numerical simulatio n. in section 3, by using fourier transform technique and applying the paraxial approximation in frequency domain, we derive an integral solution for the transverse and longitudinal components of the light field propagating in free space

    接著，考慮了幾種特殊的脈沖gauss光束（ pulsedgaussianbeam ） ，結果顯示，在此情況下緩變包絡近似（ slowly - varyingenvelopeapproximation ）理論已不再有效，其失效的原因是，該理論導致了脈沖光束解的空間奇異性，並使脈沖光束不再具有符合物理意義的光束行為，而通過復解析信號的分析方法可以消除這種空間奇異性。
  9. With the decoupling average technique and high - temperature approximation, we obtain the graph of the system magnetization evolving, which clearly exhibit the critical slowing phenomena of xy model near the phase transition region

    運用退耦平均技術，在高溫近似下數值模擬得出的平均磁化強度的時間演化，清楚地展示了xy模型在相變發生區域內的臨界慢化現象。
  10. The recursive modification algorithm is mainly based on the ideal of stochastic approximation and truncation technique to obtain modification strategy for estimated parameters, it is proved that these modification parameters turn out to be a constant vector

    其中迭代的參數修正策略主要是基於隨機逼近思想和截尾技術給出了修正向量的構造演算法。
  11. This paper puts forward a new method for calculating anomaly area - the polygonous approximation method, and gives corresponding algorithm and precision - controlling technique

    摘要提出一種新的異常面積計算方法多邊形逼近法，並給出相應的演算法和精度控制方法。
  12. Traditional method can be classified two class : linear optimization technique and nonlinear optimization technique, linear optimization technique base on born approximation or rytov approximation is usually used to solve weak scattering problem

    線性優化方法採用線性近似忽略了散射體內部的多次散射，可以有效的反演低對比度的問題，但對于高對比度問題的求解則有可能不收斂。
  13. It makes use of the mirror reflection boundary condition. the calculation result shows that the terse technique can save much calculation tune ( more than 30 % ). in fact, its result is more accurate, because it does n ' t take any approximation in the cavity region

    本文還對內含空腔系統的計算通過引入鏡面反射邊界條件而作了簡化處理，實際計算表明，簡化處理大幅度節省了計算時間，達30以上，而且其計算結果更為準確，因為它在計算過程中對空腔所在區域並未採取任何近似。
  14. After reducing the noise by the technique of signal enhancement, the more extract approximation results than traditional approach can be achieved with the tls method

    在採用信號增強技術降低觀測噪聲后，利用總體最小二乘方法估計被測信號參數可以得到比傳統方法更好的分析結果。
  15. Wavelets, an approximation technique that has received increasing attention in the last decade, are briefly reviewed

    這堂課將簡要的探討近十年來逐漸被注意的近似值演算微波分析法。
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