nurbs 中文意思是什麼
nurbs
解釋
便可以見到轉化為-
Thirdly, from the idea of locally linear approximate, another tangent - plane algorithm is presented for the distance between the convex nurbs surfaces. the critical step is the construction of the support mapping by gjk and lc to search for nearest points, and emphases are laid on dealing with isotropic cases and choosing initial iterated points. it is also proved that no isotropism during iteration would take place if initial iterated points are positive points
切平面法是運用gjk和lc構造支撐映射的原理而設計的一個搜索近點對的迭代法，著重給出了迷向情況的處理和初始迭代點的選取方法，並證明了只要將初始迭代點取為陽點，就不會出現迷向情況。 -
Isometric algorithm for nurbs curve and surface and its application to nc machining
曲面的等距演算法及其在數控加工中的應用 -
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。 -
Then a high - degree geometric continuity blending surface is obtained with transfinite interpolate method. ( e ) g3 blending surface with approximation can be constructed by lofting if geometric invariant errors are given, the surface can be converted to b - spline, nurbs form for the purpose of system aggregation
最後，為滿足曲面造型系統集成的需要，在保證曲率、曲率導數和撓率精度情況下，將上述研究結果應用於曲面放樣逼近方法，得到參數過渡曲面轉換成b樣條曲面或nurbs曲面的形式。 -
In this paper we also present a procedure for automatically reconstructing a nurbs surface of arbitrary topological type from an unorganized set of points
因此，針對具有任意拓撲形狀的曲面，本文提出了從一組無序點自動重構具有任意拓撲結構nurbs曲面的方法。 -
When no damaged compartment, damaged stability calculation is just intact stability calculation and when waterplane is horiental, geometric properties calculation is the base of hydrostatic curves. because ship hull is a kind of typical free - form surface, it is satisfactory to be modeled with nurbs
在這種情況下，船舶靜力學性能的計算，可以突破以往計算中所必須的一些假設及簡化，而是直接通過船舶靜力學性能計算的基本原理，在船體曲面圖形上直接進行計算。 -
After studying a lot of documents of computer - graphics and computation of geometrical, based on nurbs, which is a pop expression to describe curve and surface, the author put forward a method ? ? to identify bad point by most excursion, to illustrate how to choose smooth base plane, which is not referred in most documents, and to introduce optimize method of operational research to combine surfaces, especially for surfaces combination with vertex, and improvement of combination effect
在解決多曲面有角點的拼接問題中引入了運籌學的優化方法，改善了多曲面拼接的效果，而且在ugii造型軟體的基礎上，用visualc + + 、 ug / openapi進行二次開發，加入了壞點剔除，曲線光順，曲面片之間的拼接等功能，很好的解決了反求工程中所遇到的問題。 -
This interpolation module uses the popular and advanced nurbs interpolation technology. the procedures of math processing for nurbs, preprocessing for interpolation and real - time interpolating running on dsp are presented in this article. the interpolating procedure uses an advanced self - adjusting interpolation method, which can automatically adjust the length of interpolation according to machining speed, acceleration and the tolerance of bow height
插補模塊則採用了當今最流行最先進的nurbs插補技術，設計了nurbs數學處理程序，插補預處理程序，運行於dsp的實時插補程序，該插補軟體採用了先進的自適應插補方法，可以根據加工的速度，加速度，弓高誤差的要求自適應調整插補步長，同時採用了對插補點的預估演算法，免去以往加工方法中求導的運算，大大降低了運算量，提高了加工速度。 -
This thesis gives a brief account of the basic theories of software engineering and computer graphics, of the data structure of individual component modeling, of the design of the software structure and of the method of realizing software. meanwhile, this thesis put more emphasis on the exploration of the arithmetic of the delaunay triangle network, nurbs curve integration, the filling - in arithmetic of triple - tree, and the arithmetic based on the scan - line arithmetic and the filling - in of complex section
文章介紹了關于軟體工程學與計算機圖形學的基本理論及其各組件模型的數據結構、軟體結構設計與軟體實現的技術方法，並重點討論了基於約束條件的delaunay三角網格化演算法、 nurbs （非均勻有理b樣條）曲面擬合、三叉樹等值線填充演算法和基於掃描線的復雜剖面填充演算法。 -
So all type of curves and their composites can be represented in nurbs
對船舶型線的特點進行了仔細的分析。 -
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。 -
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。 -
In the past decade, a lot of new work had been proposed to overcome the limitations of nurbs, such as triangular nurbs, t - spline, g - spline, rational gauss surface, and so on
為克服nurbs的缺點，十年來，先後出現了很多新的設計方法，如三角域nurbs 、 t樣條、 g樣條和有理高斯曲面等。 -
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。 -
Based on the nurbs technique and the theory of partition for geologic body, the 3 - d engineering geologic model for underground structures is established
摘要工程區域地質條件是影響地下洞室群布置最主要的因素。 -
( 3 ) computation method of geometric properties of closed surface applied to performance calculation of ship hull surface based on nurbs is presented
（ 3 ）建立了基於nurbs的船體在任意浮態下的三維幾何特性計算新方法。 -
In the framework, a control mesh may be arbitrary one - dimensional or two - dimensional orientated topological manifold, and the curve or surface is defined on differential manifold homeomorphic to the control mesh with a potential function as its basis functions. this method is an extension of nurbs, which efficiently overcomes the limitations of nurbs
廣義有理參數曲線曲面定義在與控制網格拓撲同胚的微分流形上，以高度一般的勢函數為基函數，其控制網格可以是任意的一維拓撲流形和二維可定向拓撲流形。 -
Interpolation curve method with continuous c2 on common nurbs surface
2曲線插值法 -
The algorithm for real - time interpolation of nurbs curve
曲線實時插補演算法研究 -
Look - ahead control in high feed rate nurbs curve interpolation
曲線高速插補中的前瞻控制
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