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- The sensitivity analysis was developed using the rigid viscoplastic finite element method.The preform die shapes are represented by cubic B spline curves. 表示预锻模具形状的三次B样条曲线的控制系数用作设计变量。
- In the CAGD field, Coons surface, B spline surface and NURBS surface are mainly used. Coons类曲面、B样条曲面和NURBS曲面是CAGD中主要的曲面表达形式。
- A self adaptive method is proposed which can make line interpolating of a cubic B spline tabulated curve and generate varied step length cutter location points according to the machining accuracy. 给出了一种根据零件加工精度要求,对三次B样条列表曲线进行直线插补,自动生成变步长刀位轨迹的算法,简称自适应算法。
- In this paper, it has used three uniform B spline surface to construct the surface of the blade die cavity, and developed a CAD/CAM system of the blade die. 应用双三次均匀B样条曲面,对汽轮机导叶片锻模型腔表面进行曲面构造,据此开发了导叶片锻模CAD及其型腔表面CAM系统。
- the cubic B spline interpolation 三次B样条函数
- According to the matrix representation of quadric B spline surface,a sufficient condition of G~1 continuity between two patches of adjacent quadric B spline surface has been provided. 利用二次B样条曲面的矩阵表达式;将B样条曲面进行分片表示;给出了两邻接二次B样条曲面间的G1光滑拼接的充分条件.
- cubic B spline 三次B样条
- Sufficient Condition of G~1 Continuity Between Two Patches of Adjacent Quadric B Spline Surface 两邻接二次B样条曲面G~1光滑拼接的充分条件
- Cubic B spline curve 三次B样条曲线
- B spline surface B样条曲面
- A new approach based on cubic polynomial and B spline interposition to rebuild the CAM generated tool path under real time condition is presented in the paper. 本文采用三次参数样条曲线和B样条曲线来实时重构CAM生成的走刀轨迹,以少量的数据点便能达到比直线和圆弧插补高得多的加工精度。
- Curvature monotony condition Tor the quadratic rational B spline curves. 二次有理B样条曲线曲率单调条件
- The distance from 3-direction quartic box spline surface to the central triangular planar patch of its control net is investigated as well as its bound. 摘要研究了三向四次箱样条曲面与控制网格中心三角平面片间的距离和该距离的界。
- Amodified interpolator of cubic B -s pline curves based on sampled -data i nterpolation theory is designed to meet the requirement of NC machining of complex contouy parts. 针对复杂轮廓零件数控加工的实际需求,基于数据采样插补原理,提出了一种改进的三次B样条曲线插补器。
- non- uniform rational B - spline surface NURBS曲面
- By usage of this method,simple computation and data process can be obtained by program efficiently rather than the large scale and complex process on reconstruction of the spline surface. 该方法避免了根据离散点构建样条曲面而进行大量而复杂的计算过程,数据处理简单,并可通过程序实现,具有较高的效率。
- This paper studies the method and process of interpolating the DEM based on rectangular grid with B spline and smoothing spline. 本文研究了B样条和磨光样条应用在基于矩形格网的DEM内插中的思想、方法及实现过程。
- The paper introduces a new way to calculate the structure of a given woven fabric on the basis of float combination with B spline curve funct. 本文根据浮长线对织物结构影响的原理,结合三次B样条函数,对机织物结构进行计算,根据计算结果可以得到模拟图像效果。
- In this article,the gray-scale image LOD scheme is realized by image meshing and B spline subdivision wavelet transform. 通过将灰度图像网格化,并在图像网格上进行B样条细分小波变换,实现了图像的LOD压缩算法。
- In this paper, B 3 spline surfaces are introduced to model complex objects, then the radar cross section (RCS) of complex objects modeled with B_3 spline surfaces is calculated by the physical optic (PO) method. 引入B3样条曲面片拟合目标外形,然后利用物理光学(PO)技术分析由B3样条曲面构成的目标的雷达散射截面(RCS)。