曲線逼近 的英文怎麼說

中文拼音 [qūxiànbījìn]
曲線逼近 英文
curve approximation
  • 曲 : 曲名詞1 （一種韻文形式） qu a type of verse for singing which emerged in the southern song and ji...
  • 線 : 名詞1 （用絲、棉、金屬等製成的細長的東西） thread; string; wire 2 [數學] （一個點任意移動所構成的...
  • 逼 : Ⅰ動詞1 （逼迫; 給人以威脅） compel; force; drive; threaten 2 （強迫索取） extort; exert pressure ...
  • 近 : Ⅰ形容詞1 （空間或時間距離短） near; close 2 （接近） approaching; approximately; close to 3 （親...
  • 曲線 : [數學] curve; bight; bought; profile; net曲線板 french curve; irregular curve; curve board; splin...
  • 逼近 : 1 （靠近 接近） press on towards; gain on [upon]; approach; crowd on; close in on; draw near 2 [...
  1. The anticipant control curve approximating strategy and corresponding self - learning strategy are submitted and implemented very well. the result of expert control in three - tank liquid level equipment and three - zone high temperature furnace is satisfying

    提出了期望曲線逼近策略及相應的自學習機制，並在專家控制器中得到較好的實現，在對三容水槽和三溫區高溫加熱爐實施的專家控制中得到了較好的控制效果。
  2. We compare the approximation of an analytic function f by its taylor polynomial and its poisson partial sum with the same number of terms and illustrate that for functions with limit zero at infinity and for bounded functions the poisson expansion provides a better approximation to the function than the taylor expansion

    在第三章中，介紹了rb曲線與poisson曲線的概念以及基本的幾何性質，指出了poisson基函數與有理bernstein基函數之間存在的關系，並且將解析函數的taylor逼近與poisson逼近進行比較。實例表明，對于在無窮遠處極限為0的函數以及有界函數， poisson逼近比taylor逼近效果要好。
  3. The relation of radius of curvature and error as well as formulas of increasing parameters on condition of constant error are diverted. the equation of the line on the center of approximate circular arc is obtained ， and it can avoids the trouble that numerical solution owns possibility of no convergence and simplifies node calculation of non - circular curve

    導出了曲率半徑與逼近誤差之間的關系和等誤差條件下的參數遞推公式，建立了通過逼近圓弧圓心的直線方程和圓心坐標計算公式.按這種方法用圓弧逼近平面參數曲線，不需要求解非線性方程組，避免了計算可能不收斂的麻煩，簡化了非圓曲線的節點計算過程
  4. Approximation of quadric curves by polynomials

    基於船體放樣的曲線的逼近
  5. The approach includes ( 1 ) obtaining the cutter - location data based on parameter curves. ( 2 ) tessellation of the trim nurbs surfaces into triangles. ( 3 ) interference detection and tool - position correction

    在曲面的參數線上規劃刀位軌跡，將曲面用三角片離散逼近，利用刀具曲面與三角片的幾何相關性進行干涉檢查及刀位修正。
  6. Support vector machine for curve approximation

    一種基於支持向量機的曲線逼近方法
  7. Secondly, based on nurbs curves approximation algorithm, a nurbs surface approximation algorithm on discrete data sets is given. thirdly, a shape - preserving parametric surface interpolation to data set is given

    2基於所給的nurbs曲線的逼近演算法，建立了帶插值條件的離散點集的nurbs曲面的逼近演算法。
  8. ( 2 ) offset approximation for bezier curves the problem of parametric speed approximation of a curve is raised. the author points out that the crux of offset curve approximation lies in the approximation of parametric speed

    （ 2 ）等距曲線逼近（ offset ）提出了曲線參數速度逼近問題，指出等距曲線逼近問題的關鍵在於參數速度的逼近
  9. The nurbs curves and surfaces approximation to constrained data sets is discussed in this dissertation. the major works are as follows : firstly, based on simulated annealing algorithm and least square principle, a nurbs curves approximation algorithm to constrained discrete data sets is presented

    本文討論了帶約束的離散點集的nurbs曲線、曲面的逼近問題，主要工作如下： 1基於模擬退火演算法和最小二乘法，給出了帶插值條件的離散點集的nurbs曲線逼近的演算法。
  10. Finally, a method is put forward to construct the nurbs curves on sphere, which extends the de boor recursive algorithm in r3 to one on the sphere by replacing the geodesic distances for the lines and studies their many geometric properties analogous to those in euclidean spaces, such as the differential property, the local property, the parameter invariance under a projective transformation, and so on

    兩種方法均給出誤差估計，使逼近螺線可達到任何預先給定的精確階。最後，給出球面nurbs曲線生成演算法：用球面上測地線? ?劣大圓弧代替直線段，將歐氏空間r ~ 3中的deboor遞推演算法推廣到球面上構造麯線。
  11. The algorithm has many advantages such as the input format and output format being uniformed, high efficient, wide application, etc. it has abroad market values in many domains, such as the weather character demonstration, computing and the demonstration of anomalous graphics, etc. we know that curves can be approached by mini line - segments, so the boolean operations between almost all regions can be implemented by this algorithm

    本演算法具有輸入、輸出數據格式統一、效率高、應用面廣等優點。在實現天氣氣象圖的演示、各種不規則圖形的顯示和計算等領域具有很廣闊的市場前景。由於曲線邊界可以由小線段組成的多邊形來逼近，所以通過本演算法，我們還可以實現任何邊界區域間的布爾操作。
  12. 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。
  13. If the geometric hermite data is from a smooth function with the arc - length parametric, the cubic ph approximates the smooth function, the error in the approximation of a short segment of length h is found

    如果此三次ph曲線插值于以弧長為參數的某一函數曲線，則可以給出三次ph曲線逼近該一小段曲線的逼近誤差。
  14. In this paper, based on the notion of passing smoothly through the " middle " of data and analyzing sketch curve ' s character, i developed the concept of principal curve of sketch curve, and provide an adaptive algorithm by polygonal line for approximating principal curve

    本文分析了徒手畫曲線的性質，基於從徒手畫曲線數據點「中間」穿過的思想，運用一乘距離，提出了徒手畫曲線的主曲線（ principalcurve ）的概念，並提供了一種搜索該主曲線的折線逼近演算法，自適應地得到主曲線。
  15. In the main - process, the coordinates of nodal points on part outline curve can be calculated by replacing this curve with a linear approximation. the codes expressed in nc program form which can be recognized by nc machine tool are got according to the coordinates of these nodal points in the post - process

    在前置處理中，用直線逼近零件輪廓，得到輪廓曲線的節點坐標：在後置處理中，根據這些節點坐標按照數控程序的格式得到數控機床可以辨認的程序代碼。
  16. Global b - spline approximation of given data points

    樣條曲線逼近
  17. The algorithm is simple and is easy to accomplish. the approximation extent is high

    演算法原理簡單，易於實現，構造的nurbs曲線逼近程度高。
  18. But all designed software before in our country still have some weakness, for example, the conventional type of cam counld be projected by these software is very little, and used approximation by lines to curves of cam which have bigger error and more nodal points that result in chattering of principal axis. in furthermore, this software of designing cam in fact only has the function of cad. if you want to simulate and work over the designed cam in that software, you will find that you have to export it to other cad / cam system software ( e

    隨著數控加工在我國的深入開展，真正實現我國的凸輪cad cam就顯得非常必要，但以往的凸輪設計軟體還存在許多不足，如可設計的凸輪類型較少，大多集中於平面凸輪；且採用誤差較大、節點數過密的直線逼近法生成凸輪工作曲線，造成計算時間長，且加工中產生較大振動；同時這些凸輪設計軟體基本上只具有cad功能，如果想將設計好的凸輪進行模擬和加工，就必須將圖形輸出到其它通用cad cam軟體（如mastercam等）中，因此這些軟體在實際應用中總不盡人意。
  19. Curve - intersecting poly - line approximation and compression of general curves

    一般曲線的相交折線逼近與數據壓縮
  20. The matrix representations of nurbs are applied in the interpolation of nurbs curves and surfaces. in order to improve the effect of approximation, the paper introduces optimal method and presents a practical optimal algorithm for approximation of nurbs curves and surfaces

    接著研究了nurbs曲線、曲面擬合問題，提出用nurbs的矩陣表示來進行插值，簡化了計算過程；採用優化的方法對nurbs曲線、曲面逼近的效果進行了改進，提出了實用的nurbs曲線、曲面逼近的優化演算法。
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