gaussian approximation 中文意思是什麼

gaussian approximation 解釋
高斯近似法
  1. On the other hand, the electric field and intensity distributions of the he11 mode in the hollow fiber are calculated by using the exact solutions of maxwell equations based on the vector model, and the diffracted near - and far - field distributions of the he11 - mode output beam under the fresnel approximation are studies. we derive an analytical expression on the far - field distribution of the he n - mode output beam in free space and discuss its applicable condition. we also analyze and compare the differences between the he11 - and lp01 - mode output beams, and find that the near - field distribution of the lpoi - mode output beam is a gaussian - like one, but the near - field distribution of the he11 - mode output beam is a doughnut - like one, whereas the far - field distribution of both the lp01 - and he11 - mode output beams are a doughnut one

    此外，我們把中空光纖中lp _ （ 01 ）模（標量模型）和he _ （ 11 ）模（矢量模型）的場分佈以及它們各自的輸出光束的近場與遠場分佈進行了比較，發現兩種模式的輸出光束在近場分佈有很大的區別， lp _ （ 01 ）模輸出光束在近場是一個高斯分佈，而he _ （ 11 ）模輸出光束在近場是一個中空光束，在遠場兩種模式的輸出光束分佈是基本一致的，這正是由於在中空光纖中採用了弱波導近似以後所引起的誤差。
  2. Group gaussian approximation iterative detection for turbo - blast

    系統的分組高斯近似迭代檢測演算法
  3. Nature of light, geometrical optics, and gaussian approximation, wave optics, interference of light, coherence, polarization of light, diffraction of light

    光的性質、波動光學、幾何光學及高斯近似、光的干涉、相干性、光的偏振、光的繞射、一些重要的應用實例。
  4. The gaussian approximation method used in single traffic cdma system is introduced, at the same time the improved gaussian method also discussed for greater accuracy, when the active user load is small. however, the improved gaussian method needs more complicated calculations

    研究gsc的結構以及其輸入端信號的統計分佈，為我們後面研究多速率擴頻系統分集合併的gsc接收機作一些必要的數學準備。
  5. On the basis of sga, the validity of improved gaussian approximation ( iga ) method is established in our systems and the accuracy of the bit error rate expression obtained via siga is demonstrated with monte - carlo simulations

    在此基礎上證明改進型高斯近似法（ improvedgassianapproximation ，簡稱iga ）在本文所述系統中的適用性，並利用其簡化演算法（ simplifiediga ，簡稱siga ）得到簡潔的誤碼率近似表達式。
  6. The simplified gaussian approximation can be obtained, which has almost the same in accuracy but much less calculations than improved gaussian approximation method. the single traffic cdma system in nakagami fading channel with rake receiver is investigated extensively. a closed form ber expression is obtained with arbitrary chip waveforms

    由於在用戶小時其誤差大，改進高斯法可以提高精度，但需要更多的計算時間，少用戶時直擴系統的工程計演算法能夠獲得與改進高斯法相似的精度，但需要的運算量大為減少。
  7. Their learning and training rules have been analyzed profoundly and their abilities to approximate arbitrary nonlinear function have been testified and compared by the simulation. a new rbf neural network has been presented which uses a raised - cosine function as activation transfer function. it provides a wider generalization in comparison with gaussian rbf neural networks by simulation as well as strong approximation ability, fast convergence, a rule to select the parameters of the networks

    本文詳細研究了兩種典型的前向神經網路（ bp網路和rbf網路）的學習和訓練演算法，提出了一種新穎的基於緊支集餘弦函數的徑向基神經網路，其克服了常用的高斯型rbf神經網路雖具有緊支集但各基函數非正交的不足，其收斂速度快、網路參數選取有理論依據且相比于高斯型rbf神經網路具有更強的泛化能力，模擬驗證了其有效性。
  8. Abstract : based on two order approximation of the variation of refraction index produced by self - action while optical pulses are traveling in kerr - medium, the propagation equation has been solved. furthermore, the strict analytical expressions of the amplitude, width and chirp parameter of chirped gaussian pulse, relative to the propagation distance, are deduced. the solitary wave traveling conditions of fundamental mode gaussian pulse have been discussed

    文摘:將光脈沖在克爾介質中自作用產生的折射率變化作二階近似，求解所得到的傳播方程，得到啁啾高斯脈沖幅度，脈沖寬度和周啾參數隨傳播距離變化的嚴格解析解，討論了基模高斯脈沖孤波傳播的條件。
  9. Firstly, in the paper a family of integral solution representing ultrashort pulsed beam propagating in free space have been studied by using the co - moving frame coordinates and the fourier transformation for time variable in terms of well - known paraxial approximation. and the pulsed gaussian - like beam solution can be obtained as a especial solution of the integral solution, where including the pulsed gaussian beam

    首先利用傅立葉變換和惠更斯-菲涅爾衍射積分公式，我們給出了傍軸標量場近似下超短脈沖光束傳輸的基本積分解，並進一步得到了用卷積形式表示的脈沖類gauss光束解（ pulsedgaussian - likebeam ）的普遍形式解。
  10. 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。
  11. Making full use of the correlated space information of multi - beam bathymetric data, the author put forward a method of gaussian surface approximation to build the grid net of regular digital terrain model ( dtm ) of surveyed seafloor, which is more accurate than other approximation methods

    本文充分利用了多波束數據的空間相關信息，提出了一種基於高斯地形曲面擬合的數字地理模型數據網格化方法，準確快速地得到標準等深線圖。
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