参数曲线（Parametric curve）或曲面

Code Excited Linear Prediction（CELP）codec is a kind of parametric coding methods based on LPC analysis in speech coding.

Creo中哪个模块主要用于三维设计？ A: Creo Parametric B: Creo Simulate C: Creo Sketch D: Creo Layout

All of the following are examples of tools often used in estimate costs EXCEPT （）. A: parametric modeling B: analogous estimating C: bottom-up estimating D: activity duration estimates

本课程学习的是creo的哪一个模块？ A: PTC Creo Direct B: PTC Creo Parametric C: PTC Creo Simulate D: PTC Creo Layout

Which of the following statements about keywords in functions are true..( ) A: The functions with suffiffiffixes of rnd are used to indicate the random number generator. B: The functions with suffiffiffixes of stat are used to indicate the statistics analysis. C: The functions with suffiffiffixes of fit are used to indicate the parametric estimation. D: The functions with suffiffiffixes of pdf are used to indicate the probability density function.