line spline 中文意思是什麼
line spline
解釋
線形樣條線-
They not only inherit the advantages of bezier curves and b - spline curves, also can be used to represent straight lines precisely and some remarkable transcendental curves precisely, such as circular arc, ellipse, cardioids and twisted pair line etc. especially, the uniform t - b - spline curve of three degrees is smoother than b - spline curve and c - b - spline curve of the same order
此外由於它們還具有三角函數的優點，故既可以精確表示直線段、二次多項式曲線段又可以精確表示圓弧、橢圓弧等二次曲線以及心臟線、雙紐線等超越曲線。特別地， 3次均勻t - b樣條曲線曲面比同階均勻b樣條（ c - b樣條）曲線曲面具有更高的光滑度。 -
Densifying contour map based on intersecting algorithm of line and b - spline curve
樣條曲線求交演算法加密等高線圖 -
The crack - growth increment of crack - line is computed by paris formula followed by fitting using three - time b - spline function
根據以上思想方法，編寫了具有較高的計算效率和精度的數值模擬程序。 -
The paper has improved the existing lifting - line and lifting - surface design method by including the rake and skew and solving the optimum circulation distribution with the optimum theory. the blade geometry is expressed with b - spline for the lift - surface method. the boundary condition on the blade is transformed to minimize the summation of the square of normal velocities, the fair blade geometry can be obtained by present technique and the design quality is better
改進了現有的升力線和升力面設計方法，在升力線設計中計及槳葉的縱傾和側斜的影響，用優化理論求解最佳環量分佈，升力面設計中用b樣條來擬合槳葉，將物面邊界條件轉化為求法向速度分量的平方最小，由此可得到光順的槳葉幾何形狀，提高和改進了設計質量。 -
This process is as follows : firstly, the data of different section contour and of section line have been obtained by reverse - engineering ; secondly, non - uniform b - spline approximation algorithm is used to fit the discrete data ; then the data have been optimized and reduced by adopting adaptive sampling of key points of the fitted curve based on vertical distance, sequently the adaptive sampling data is transformed into the format of the. ibl file of the famous 3 - d design software pro / e. therefore we reconstruct the surface and a model is generated ; lastly, the effectiveness of the adopted algorithm and modeling approach are demonstrated by the experiments
建模型的過程中，首先運用逆向工程測量方法，獲得曲面物體上不同截面輪廓線的測量數據點列，接著對測量數據點進行平滑處理，用最小二乘法求解基於數據點列的控制多邊形，以非均勻三次b樣條曲線擬合截面輪廓曲線；然後利用基於垂距的數據采樣演算法，對擬合曲線上的數據點進行重新采樣，達到優化數據點的分佈及減少描述曲線數據量的目的。 -
( 3 ) the thesis proposes an improved algorithm for fairing of bi - cubic b - spline surface which detects the location of non - fairing automatically and adjusts the relative control points. in addition, a new highlight - line method used for surface interrogation is presented
另外，對曲面光順性檢查的高光線方法進行了改進，用光片模型取代光柱模型，解決了現有高光線方法存在的檢查結果與基準光線相關的問題。 -
In calculation, cubic spline curve is used to instead contour line. this method can increase the precision of curvilinear distance measurement
並在具體計算時，採用三次樣條曲線代替輪廓線，提高了曲線長度的計算精度。 -
The main content of this dissertation includes the processing of the distillation of the contour line from the paper map and the design of the b - spline surface interpolation for the scattered data
主要內容涉及了從紙地圖掃描圖像中提取等高線的實現方法和步驟，以及基於等高線的b樣條曲面插值的方案設計和演算法實現。 -
Polynomial, transcendental function, new quadratic curve, b - spline and nurbs have been used in expression of hull molded line, trapezoidal method, simpson method have been used in static calculation
在船體型線的表達方面有多項式、超越函數、新二次曲線、 b樣條函數、非均勻有理b樣條函數等。 -
By using multiple knot insertion techniques, cusps and straight - line segments allow to arise in the nuat b - spline interpolating curve, and its slackness and smoothness can be controlled by the change of the parameter
2 .通過重節點插入技術構造了帶有尖點或直線段的混合插值曲線，分析了混合因子對插值曲線鬆弛性的調節作用 -
4. the author particularly discussed the drafting method of involute, using spline which is defined by many points to construct involute. compared with other involute defined by arc or straight line segment, the precision of this kind of involute is improved evidently
4 .對齒輪漸開線的造型方法進行了詳細的分析研究，用多點定義的spline線來構造漸開線，與用圓弧或直線段擬合方法相比，漸開線的精度得到顯著提高。 -
The latest scheme for objective analysis and mathematical model of quadratic 8 spline connecting line is using for improving analysis quality. plotting test have shown that this scheme has the characteristics such as reasonable design, high quality in map analysis
一是採用三角形、矩形面積插值方案，並加入物理原則，提高了客觀分析質量；二是聯線數學模型採用二次樣條函數，大大改善了等值線的光滑和均勻度；三是屏幕等值線修改採用人機對話方式，操作十分方便。 -
In proc. the eurographics acm siggraph symposium on geometry processing sgp 03, aachen, germany, 2003, pp. 127 - 137. 19 gormaz r. b - spline knot - line elimination and b ezier continuity conditions
我們的實驗結果說明了三角b樣條不僅具有理論上的完備性，並且是計算機圖形學和幾何設計領域中的非常實用的工具。 -
First in chapter 1, we introduce the background of the 3 - d digital terrain map, discuss the resolution of the data source of the 3 - d digital map and propose an idea that retrieving 3 - d data with b - spline surface interpolation based on the contour line distilled from paper map
首先在第一章中介紹了三維電子地形圖系統的研製背景，簡要介紹了解決目前三維顯示數據來源的方法，提出了從紙地圖的等高線提取三維數據的思路，並對整個方案的實現框架作了簡要的介紹。 -
We compare the b - spline curve interpolation and b - spline surface interpolation, analyze the fault of the b - spline curve interpolation and point out that we should use b - spline surface interpolation instead of b - spline curve to keep the continuity of the data result. also, we introduce the way to get control point from value point. then we propose the multi - step fitting of the dense and scattered data to construct b - spline surface, this algorithm perfectly resolve the obstacle of denseness and scattering of the contour line data
第三章介紹了b樣條插值原理，論述了用b樣條曲面代替b樣條曲線對等高線進行插值，解決了線插值的不連續問題；並在b樣條曲面中運用了密集散亂數據點多步擬合演算法，解決了對等高線進行b樣條曲面插值中數據點散亂冗餘的問題。 -
First, the human body surface is divided into seven parts, and each part is created by the way of using double cubic b - spline surfaces. to attain g1 continuity on the stitching line of two b - spline surfaces, one order tangent condition is applied to the bound of each b - spline surface
首先，在人體建模過程中本文將人體表面分成七個部分，用雙三次b -樣條曲面模擬每一部分曲面，並在曲面的邊界處定義了一階切矢條件，使兩曲面片在拼接處達到了g ~ 1連續。 -
The on - line stroke recognition algorithm can recognize the rough strokes and transform them into three basic geometric line - elements, including straight line, arc and b - spline
筆劃的在線識別主要是將原始筆劃轉換為規則的基本幾何線元，即直線條，圓弧，和樣條曲線。
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