As one of important devices that transformed the crude resource into quadric resource , the boiler ' s working status affects the using rate of resource directly 锅炉作为将一次能源转化为二次能源的重要设备之一，其工作情况的好坏直接影响到能源利用率的高低。
A new method for determining knots to construct polynomial curves is presented . at each data point , a quadric curve which passes three consecutive points is constructed 一般认为，在满足给定约束条件的前提下，一条曲线具有的应变能越小，则该曲线的形状就越好。
Using local base surface parameterization , a parametric quadric surface approximation method is used to estimate the local surface curvature properties of scattered points based on propagating normal vector direction 首先，计算各点的邻近点集，选取合适的局部基础曲面，把邻近点集投影到相应的局部基础曲面。
In the displacement measurement based on the principle of laser interference , the gaussian quadrics fitting algorithm is used to fix the central position of facula and raise the location accuracy 在基于两球面波干涉的长度和距离测量实验中,运用高斯二次曲面拟合算法为激光光斑的中心坐标定位,提高了光斑的定位精度。
8 guo b . quadric and cubic bitetrahedral patches . the visual computer , 1995 , 11 : 253 - 262 . 9 wang w , qin k . on the existence and computation of rational quartic spherical curves for hermite interpolation 关于参数插值曲面构造的研究综述一般是先在每三角剖分面上构造边界曲线，而后再用一片或多片插值曲面去填充这些曲线网格。
To overcome and improve traditional bp & display the advantages of nn and inherited algorithm , the essay has put forward nn quadric training method , applied inherited algorithm to nn weight and got the result from training 为克服和改进传统的份，算法的不足，发挥神经网络和遗传算法的优势，提出一种基于遗传算法的神经网络二次训练方法。
In this algorithm , the sharp features on a mesh model are located through analysis of quadric error matrixes of super - neighbor of vertices on the model , so that these features can be preserved during mesh simplification 通过分析网格模型中顶点超邻域的二次误差矩阵，对模型上的重要细节特徵进行定位，实现了网格简化过程中细节特徵的保持。
Modern cad systems widely adopt nurbs ( non - uniform rational b - spline ) as the main modeling entity because they can represent other commonly used parametric curves and surfaces , while also being able to precisely present the natural quadric shapes such as cones and cylinders 许多国内外流行的优秀cad cam软件都声称其曲线、曲面模型建立在nurbs (非均匀有理b样条)理论和方法的基础上。
In this paper , we prove that given n images captured by a pinhole camera with varying parameters and under general motion , the number of independent kruppa constraints is 5n - 9 , and it is less than that of independent constraints from the absolute quadric by only one 本文首次从代数上严格证明了，摄像机在通常运动下当摄像机的内参数变化时,从n n 3幅图像得到的所有kruppa方程中，只有5n - 9个是独立的
This one - constraint - less property of the kruppa equations is their inherent deficiency and is independent of camera motion . this deficiency is due to their failure of automatic enforcement of the rank - three - ness on the absolute quadric 从而, kruppa方程的独立个数比基于绝对二次曲面或基于无穷远平面的自标定方程的独立个数少1 ,这是源于kruppa方程不能保证绝对二次曲面的秩为3 ,是由kruppa方程自身的特性决定的，而与摄像机的运动无关。
