rational approximation 中文意思是什麼

rational approximation 解釋
有理逼近
  • rational : adj 1 理性的。2 推理的；有理性的；懂道理的，講道理的；合理的，合道理的；純理論的。3 【數學】有理...
  • approximation : n. 1. 接近；近似。2. 【數學】近似值。3. 概算，略計。
  1. A new osculatory rational interpolation kernel function is established, which is different from the classical linear interpolation kernel functions. generally, it is a more accurate approximation for the ideal interpolation function than other linear polynomial interpolants functions. simulation results are also presented to demonstrate the superior performance of this new interpolation kernel function

    本文構造了一個全新的圖像插值核函數?自適應切觸有理插值核函數，同現有的線性插值核函數相比，其空域特性和頻域特性均最接近合肥工業大學博士論文理想插值核函數sinc函數。
  2. We also give the properties and the convergence of the two models. in the aspect of the fractal approximation of surfaces. we propose the improved quadrangular projected ifs ( qpifs ) model and quadrangular rational projected ifs ( qrpifs ) model

    在曲面的分形逼近方面，首先給出了改進后的四邊域曲面的投影迭代函數系統模型，然後給出了四邊域曲面的有理投影迭代函數系統模型。
  3. In theory of approximations, the classic methods of polynomial approximation for rational expression are various interpolations and operator approximations, such as lagrange interpolation, hermite interpolation and bernstein polynomial approximation

    在逼近論中，用多項式逼近有理式的經典的方法是各種插值與運算元逼近方法，如lagrange插值、 hermite插值和bernstein多項式逼近等。
  4. Rational curves and rational surfaces, which are a class of important approximation functions, are extensive applied in cad / cam

    有理曲線和曲面作為一類重要的逼近函數，在計算機輔助設計與製造中有著廣泛的應用。
  5. Degree reduction approximation of rational b 233 ; zier surfaces

    曲面的降階逼近
  6. Secondly, as for degree reduction of interval rational bezier curves, two methods are given : pseudo linear programming method ( plpm ) and pseudo optimal approximation method ( poam )

    接下來對區間有理bezier曲線，給出兩種降階逼近演算法：擬線性規劃法（ plpm ）和擬最優逼近法（ poam ） 。
  7. Based on the representation of interval rational bezier curves and surfaces and by a serial of mathematical transformation, the degree reductions of them are converted to those of polynomials with upper bounds, then several algorithms are presented, with linear programming and optimal approximation methods. by relaxation of some constrained conditions, approximation effects of some of them are further improved

    根據區間有理bezier曲線、曲面的特點，通過一系列數學變換，將其降階問題轉化為多項式的保上界降階逼近，再應用線性規劃和最優逼近方法求解，給出幾種逼近演算法，並探討通過約束不等式的鬆弛，進一步改進逼近效果。
  8. Rational approximation of the network function by vector fitting algorithm

    網路函數有理逼近的向量擬合法
  9. In the third chapter, interval polynomial approximation of rational curves is introduced

    第三章主要介紹了有理曲線的區間多項式逼近。
  10. The above idea is also applied to rational curves and an algorithm for offset approximation of rational bezier curves is presented

    並將以上的思想應用於有理曲線，給出了有理b zier曲線的等距逼近演算法
  11. However, due to the complex of computation and the need of the design, sometime we need to use polynomial approximation for a rational curves and surfaces

    然而由於計算的復雜性和設計的需要，有時我們還需要用多項式函數來逼近有理曲線和曲面。
  12. In this paper, we survey the development of polynomial approximation of rational curves ( surfaces ) and state the knowledge of interval curves ( surfaces ) in the first chapter

    本論文中，第一章首先介紹了有理曲線曲面的多項式逼近研究工作的發展情況和區間曲線曲面一些相關知識。
  13. Two methods are given. one is obtained by using degree reduction of interval rational bezier curves in two parameter directions according to the character of tensor product, which is called " single step method ". by comparison for degree reductions produced by the different order in two parameter directions, the relationships of the approximation results are discussed

    然後討論了矩形域上區間有理bezier曲面的降階問題，給出兩種降階演算法：一個是針對張量積的特點將問題轉變為兩參數方向的區間有理曲線的降階逼近，即「單步法」 ，並討論單步法沿兩參數方向不同次序降階的關系。
  14. This thesis makes an in - depth study in three types of operations - evaluation for bezier curves and surfaces, offset approximation for bezier curves and rational bezier curves, degree reduction for nurbs curves and surfaces, all of which are of great importance in cagd researches

    本文圍繞cagd領域中的三類佔有重要地位的運算? ? b zier曲線曲面求值運算、 b zier曲線及有理b zier曲線等距變換以及nurbs曲線曲面的降階變換問題展開深入研究
  15. Sui yunkang and yang zhiguang, modified newton method and dual method through a rational approximation at two expanded points, engineering optimization, vol. 24 ( 1995 ) : 1 - 17

    隋允康，結構優化的曲線尋優理論及其逼近論和常微分方程組解法，中國學術期刊文摘， 1卷2期（ 1995 ）
  16. In the final chapter, we discuss interval polynomial approximation of rational surfaces. firstly, we briefly state the interval - surface approximation based on the taylor expansion, and later, we give out a better interval - surface approximation based on the optimization method, which is also the main work of this paper

    第四章主要介紹了有理曲面的區間多項式的逼近，首先簡單介紹了基於泰勒展開來做的區間曲面逼近，後面是本文的主要工作，我們基於優化方法得到了更好的區間曲面逼近，它也是本文的重要部分。
  17. High - order compact - type schemes with rational and pad approximation approaches

    逼近的高階緊致型方法
  18. The fast spot price solution proposed in this paper introduces a decomposing model, which is benefit for analyzing each component of spot price. based on interior - point optimal power flow, which has superiority on calculating and decomposing spot prices under power market environment, after rational approximation, the coefficient matrix and its factor table of modifying equation are made constant and need no recalculation during iterations

    本文提出的快速實時電價演算法採用適于對實時電價各組成部分進行分析的分解模型，在內點法最優潮流的基礎上合理的常數化其修正方程系數矩陣，使其在每次迭代時不必重新計算，大大提高計算速度。
  19. Approximation of rational interpolation type operators in lp spaces

    空間有理插值型運算元的逼近
  20. High - order compact - type schemes with rational and pad 233 ; approximation approaches

    逼近的高階緊致型方法
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