Extracting quadric surface from measured data is an important problem in reverse engineering of mechanical parts 摘要在机械产品的逆向工程中，针对测量数据提取常用二次曲面是非常重要的。
This paper proposes for the first time to use genetic algorithm based on real - number - coding to extract quadric surface 首次提出利用基于实数编码的遗传算法针对离散数据点进行二次曲面提取。
Abstract an algorithm of feature surface recognition based on quadric surface fitting and geometry property was presented 摘要提出了基于二次曲面拟合误差分析和几何属性分析的特征曲面识别算法。
The connection quadric exploit is a quite active application domain of present structure computation model updating technology research 接口二次开发是目前结构有限元模型修正技术比较活跃的一个应用领域。
A simple method of solving an orthogonal transformation with a primary transformation is presented by change quadric form into canonical form 给出了利用初等变换求一个正交变换化实二次型为标准形的简便方法。
8 warren j . blending quadric surfaces with quadric and cubicsurfaces . in proceedings of the 3rd symposium on computationalgeometry 而且适用这种方法的管道曲面在形状及空间相对位置上有很大的限制，因此不便于实践运用。
Abstract : a simple method of solving an orthogonal transformation with a primary transformation is presented by change quadric form into canonical form 文摘:给出了利用初等变换求一个正交变换化实二次型为标准形的简便方法。
6 dahmen w . smooth piecewise quadric surfaces . mathematical methods in computer aided geometirc design . t . lyche and l . schumaker eds . , 此外，高和李采用了blending方法来生成隐式插值曲面，而turk和o brein采用变分方法来构造。
Similarly , they not only can represent straight lines precisely , but also can represent quadric curve precisely , such as hyperbola and so on 该曲线与tc - b zier曲线的性质完全类似，此外它既能精确表示直线段又能精确表示双曲线。
A new algorithm is presented in this paper for piecewise quadric b - splines curve reconstruction from scattered data in a plane 摘要基于控制顶点扰动的思想提出了一种新的曲线重构算法，用于构造一条分段二次b样条曲线来逼近平面上的散乱数据点。
