| 1. | Ac servo system beasd on fuzzy b - spline function neural network control
样条基函数神经网络控制的交流伺服系统 |
| 2. | Cubic spline functions polynomial are used directly to approximate the time - varying coefficients
利用三次样条基函数多项式逼近时变系数，将时变参数的佑计转化为定常参数的估计。 |
| 3. | The widely used basis functions in cagd , such as bernstein , b - spline and nurbs basis , are all normalized b - basis
Cagd中广泛使用的表示曲线曲面的基函数，如bernstein基、 b样条基、 nurbs基等均为规范b基。 |
| 4. | As a model , spline interpolation on a uniform tetrahedral partition was used , and the spline coefficients were repeated by the gridded samples
该模型以样条基函数为背景，系数则由周围采样点数据重复迭代产生。 |
| 5. | When it was built in 1905 , island house stood on a small islet called yuen chau tsai near the head of tolo harbours , which was connected to the mainland by a causeway
前政务司官邸于一九五年兴建之时，坐落于吐露港一小岛元洲仔上，原由一条基堤与陆地连接。 |
| 6. | The quadratic uniform b - spline curves are extended , and a class of polynomial blending functions of degree 3 and degree 4 are presented in this paper , which can be extended to the case of degree n
扩展了二次均匀b样条基函数，构造出三次和四次带局部参数_ i的调配函数，推广后得到了n次的调配函数。 |
| 7. | They have the properties like the quadratic uniform b - spline basis functions . the piecewise polynomial curves generated by the above - mentioned functions possess the same structure and geometry properties as piecewise quadratic uniform b - spline curve
它们具有二次均匀b样条基函数的性质，且用它们生成的分段多项式曲线具有与分段二次均匀b样条曲线相同的结构和几何性质。 |
| 8. | The details are as follows . the correlative knowledge of basic spline and bernstein basis functions , the theory of basic spline and bezier curves & surface and their rational forms , all these are regarded as the academic background of further research
涉及b样条基函数及其性质， b样条曲线曲面和有理b样条曲线曲面及其性质， bernstein基函数及其性质， b zier曲线曲面和有理b zier曲线曲面及其性质等等。 |
| 9. | As further extension of the uniform b - spline basis functions , the author extends the uniform b - spline basis functions of degree 3 and degree 4 , and generates the blending functions of degree 5 ( 3 - b ) n degree 5 ( 4 - b ) and degree 6 ( 4 - b )
作为均匀b样条曲线的进一步扩展，作者对三次和四次b样条基函数进行扩展，构造了三b五次、四b五次、四b六次调配函数，从而产生了连续性分别达到c ~ 3和c ~ 4连续的多项式曲线，它们的形状都可以用参数进行调整。 |
| 10. | Another algorithm is based on pixels : sample many points along the curve , round them to the nearest integer and set each pixel the computed point falls in . although this algorithm uses integer arithmetic , it provides the smooth curve possible at the expense of computation time as many points have to be computed to ensure that no gaps are created along the curve . furthermore these two algorithms we mentioned above is appropriate for low degree parametric curves , for high degree parametric curves , we usually approach them by using low degree rational parametric curves , the generating curve ' s fairness property is not very good
我们知道当节点矢量的两端节点均为k重节点且无内节点时， b样条基函数退化为bemstein多项式，因此该生成算法还可推广到b能ier曲线中，具有广泛的应用价值、同样地，在cad和cagd中，有理b样条曲线，特别是非均匀有理b样条曲线( nurbs )已经成为曲线曲面设计中最广为流行的技术，然而对这些曲线目前也尚无很好的曲线生成算法，因此有理b样条曲线的生成算法无疑有着更重要的意义 |
