| 1. | In the third chapter , interval polynomial approximation of rational curves is introduced
第三章主要介绍了有理曲线的区间多项式逼近。 |
| 2. | The above idea is also applied to rational curves and an algorithm for offset approximation of rational bezier curves is presented
并将以上的思想应用于有理曲线，给出了有理b zier曲线的等距逼近算法 |
| 3. | Rational curves and rational surfaces , which are a class of important approximation functions , are extensive applied in cad / cam
有理曲线和曲面作为一类重要的逼近函数，在计算机辅助设计与制造中有着广泛的应用。 |
| 4. | However , due to the complex of computation and the need of the design , sometime we need to use polynomial approximation for a rational curves and surfaces
然而由于计算的复杂性和设计的需要，有时我们还需要用多项式函数来逼近有理曲线和曲面。 |
| 5. | At last , the t - b zier curves and t - b - spline curves can be converted to rational curves so easily that they can be merged into current geometry modeling rapidly
最后由于这两类曲线仅由三角函数构成，所以它们较易转化为有理多项式曲线。从而融入到现有的几何造型系统中。 |
| 6. | In this paper , we survey the development of polynomial approximation of rational curves ( surfaces ) and state the knowledge of interval curves ( surfaces ) in the first chapter
本论文中，第一章首先介绍了有理曲线曲面的多项式逼近研究工作的发展情况和区间曲线曲面一些相关知识。 |
| 7. | Pythagorean hodographs exhibit remarkably attractive properties for practical use . for example , their arc length is expressive as a polynomial function of the parameter , and their offsets are rational curves
Ph曲线呈现出非常优良的实际应用价值，例如它的弧长可表示为曲线参数的一个多项式函数，其等距线是有理的。 |
| 8. | As far as parametric curves and surfaces are concerned , we discuss the point - by - point generating algorithms for parametric polynomial curves , parametric rational curves and parametric polynomial surfaces
对于参数曲线曲面，介绍了参数多项式曲线，有理参数曲线和参数多项式曲面的逐点生成算法，这些算法能广泛地应用于实际。 |
| 9. | The viscoelastic relaxation moduli in time domain are obtained by the inverse laplace transform of the curve - fitted formulae . the method takes advantage of rational curve - fitted formulae and avoids complicated numerical inverse laplace transform
该方法利用合理的曲线拟合函数避开了复杂的数值laplace逆变换，使得单向纤维增强复合材料的粘弹性性能的确定变得容易。 |
| 10. | The simulated test of the mechatronics soft start equipment is made regarding the experimental platform of belt conveyor as load , the sensor design is had for selecting type , the testing datum are gatherd and analyzed , the rational curve of velocity in the starting and braking progress are gained , the best matching ratio of driving power for the double asynchronous moters is found
以带式输送机实验台为负载进行了机械电子式软起动装置的模拟试验，对传感器进行了选型设计，对试验数据进行了采集与分析，确定了合理的起、制动速度曲线，求出双电机驱动功率的最佳配比。 |
