approximation formula 中文意思是什麼

approximation formula 解釋
逼近公式
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  • formula : n （pl formulas lae ）1 公式，程式；定則，方案。2 【醫學】配方，處方。3 （政治口號等的）提法，表...
  1. Then based on kirchhoff approximation theory, the formula of the coherent and incoherent scattering intensity of plane wave from two dimensional dielectric normally distributed rough surface are derived, and the scattering intensity of a planar, rough surface of unit area

    然後從粗糙面散射kirchhoff標量近似理論出發，得到了平面波對高斯分佈的二維隨機粗糙面的相干散射和非相干散射強度表達式，並給出了單位面積粗糙面非相干散射的表達式。
  2. In this paper, the practical data is analysed and get a good effect. it proves that it is vailed for vti layers using the approximation moveout formula in this paper. this method has a good foreground

    本文還結合實際資料進行了分析，取得了較好的效果，說明了用本文建立時距曲線擬合公式進行橫向各向同性介質多波速度分析是可行的，且具有廣闊的發展前景。
  3. The integral method via a scaling and squaring algorithm with the pade approximation is presented. the three - stage lobatto iii a formula is applied to structural dynamic time history analysis. and the three - stage lobatto a formula to use hermite third order interpolations to solve interpolating middle input between two boundary points is present, which provides more accurate solutions

    提出了基於自適應變尺度pad函數逼近的精細積分方法；建立基於lobatto a一階代數微分方程邊界問題數值求解技術求解結構動力學問題的時程分析方法，提出了中間插值點hermite三次插值lobatto a數值逐步積分時程分析方法。
  4. In the space, wavelet approximation formula and sampling formula are gived and these are simple and easy for calculation. it is a new attempt to establish mra in the reproducing kernel space. this not only makes up existing researchful defects but also gives a better method to resolve numerical approximation problems and it further enriches the reproducing kernel theory and wavelet method. this provides more applied method for resolving numerical approximation problems in the space which is often used in the engineering

    在再生核空間中建立的多尺度分析方法是利用再生核工具探討小波理論的又一次大膽的嘗試，它不但彌補了現有研究的缺憾，而且給出了解決數值逼近問題的一個新思路，進一步豐富了再生核理論，充實了小波方法，這為在工程中常用的空間中解決數值逼近問題又提供了一種較為實用的方法。
  5. Comprehensively discuss the issues in application, adaptive condition and performance, propose a fast arithmetic of forward modeling and depth migration in common shot gathers with one - way acoustic wave equation based on vrselrf, and verify the arithmetic by numerical simulation. concisely discuss the cause of the creation of evanescence and the problem of lateral amplitude discontinuity result from it. fourthly, use the reflectivity model, computed to describe the fracture model, with the formula of computation reflectivity based on elastic - acoustic approximation, and the wavelet model computed by the method, wavelet creation with fourier transform, we proposed, in conjunction with vrselrf wavefield extrapolation operator

    第三，將頻率波數域穩定的變參考慢度rytov近似廣義屏波場延拓運算元（ vrselrf ）應用於疊前與疊后正演模擬、疊前與疊后深度偏移，對演算法應用中應注意的問題、適用范圍、性能等作了較為全面的論述；提出了基於vrselrf的單程聲波方程共炮記錄正演模擬和深度偏移快速演算法，並通過數值模擬試驗對演算法進行了驗證；簡要地討論了倏逝波的產生原因及其帶來的橫向振幅不連續性問題。
  6. The energy loss of protons or silicon nuclei due to nuclear scattering is calculated using binary collision approximation and the " magic " formula is used to calculate the scattering angle. the electronic energy loss is calculated by bethe - bloch formulation at high energy, by linhard - scharff formulation at low energy and the interpolation formulation is used for the medium energy region. the nuclear reaction is calculated using intra - nuclear cascade model

    核散射採用經典兩體碰撞近似，並用「夢幻」公式求解散射角；電子阻止在高能時採用bethe - bloch公式，低能時採用lindhard - scharff公式，中能時採用biersack的插值公式；核反應過程採用核內級聯模型。
  7. Firstly, the voronovskaja type formula of asymptotic expansion of this kind of operators is given. then the approximation of the bounded variation functions by the kinds of operators is discussed

    第一節給出該運算元的voronovskaja型漸近展開公式；第二節討論該運算元對有界變差函數的逼近。
  8. Abstract : the second scalar analysis method to calculate the di ffraction efficiency of grating was described in detail, a simple effective approximation formula to calculate the diffraction efficiency of grating was educed. diffraction efficiencies were given and compared with scalar results, rigorous vector results

    文摘:詳細介紹了計算光柵衍射效率的二階標量近似法，推導出一種簡單有效的計算光柵衍射效率的近似公式.給出了利用近似公式對幾種情況下光柵衍射效率的計算結果，並與普通標量法、嚴格矢量法的計算結果進行了比較
  9. ( 5 ) the constructively sufficient conditions of the approximating c1 functions and the explicit formula dealing with the approximation precision and the number of fuzzy rules are given for one kind of general fuzzy systems, using the methods different from the former ones which are based on the stone - weierstrass theory, therefore, the constructively sufficient conditions are also generalized from polynomial function to c1 function

    （ 5 ）針對一類一般的模糊系統，採用與通常的基於stone - weierstrass定理證明模糊逼近器不同的方法，首次給出了它們逼近c ~ 1函數的構造性充分條件，並給出了逼近精度與模糊規則條數之間關系的顯式表達式
  10. Combining with practical investigation and analysis, the author presented the fitting equation of the second non - uniform coefficient in which the method of least squares error approximation with the power index regression is used and proposed a modified formula for flow rate per second calculation to precisely determine the size of pipeline and to make the design advanced in technology and reasonable cost

    本課題分析了室外和室內的設計流量公式，通過調查、實測本地區的水量資料，運用相關數學方法分析，提出了適合小區給水管網採用的流量公式。
  11. New approximation formula for calculation of elastic impedance in anisotropic media

    一種新的各向異性彈性阻抗近似公式
  12. We simply discuss those which are of importance to realizftg bandwidth requirement and with an approximation formula, the bandwidth is estimated

    本文簡單地分析了實現帶寬要求的主要因素，並應用近似公式對帶寬作出了估計且表明帶寬要求是可以實現的。
  13. By analysing the compute result of the quadratic approximation formula, we educe the conclusion that 3 is the best rank code for the quadratic approximation formula

    通過對最小二乘擬合公式實際計算結果的分析，得出了「擬合公式階數取3為最佳」的結論。
  14. Lbie, based on the local boundary equation, adopts the traditional moving least squares ( mls ) approximation which depends on only the values of the nodes in the domain of the problem or along its boundary. the whole process of integration is carried on over a local domain or its local boundary centered at the node in question. the local boundary equation can be rewritten to represent the values of the unknown function at the point of interest, and the essential boundary conditions can be directly and easily enforced by using the green formula and the characters of the dirac function

    它以局部邊界積分方程為基礎，採用移動最小二乘近似函數，從而只需要分佈在問題域內及其邊界上的節點的信息值，無需劃分單元；整個積分是在以節點為中心的局部域及其邊界上實現，所以不需要背景積分網格；藉助于格林公式及dirac函數的性質，將局部邊界積分方程轉化為所考慮點的未知函數的邊界積分表達式，便於直接施加本質邊界條件。
  15. Depending on the image method and point source approximation method, the physic model was established, and the formula of photo - current versus surface recombination velocity was obtained

    導出了光電流與表面復合速率相應關系的計算公式，確定了可進行電量測量的實驗裝置。
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