We are finding a parametric equation for the sphere using two variables phi and theta which happen to be part of the spherical coordinate system.
我们建立有两个变量φ和θ的球面的参数方程,它们恰好是,球坐标系统的一部分。
The geometric meaning for the parametric equation of ellipse is a familiar thing (See example 1).
椭圆的参数方程的几何意义是众所周知的(见例1)。
Finally it summarizes the traits of problems which are suitable for using the parametric equation.
最后总结了适宜用参数方程解题的题型特点。
Numerical example showed that the parametric equation is rational to describe the shape of mooring line.
算例表明，描述锚链线形状的参数方程是合理的。
An algorithm which can draw any complex surfaces expressed by explicit equation or parametric equation was given.
提出了显式方程和参数方程表示的曲面的一种绘制算法，该算法可以绘制任意复杂的方程曲面。
Author presented a concise gradual derivation about higher derivative whose function defined by parametric equation.
求由参数方程所确定的函数的高阶导数，提出了一种较为直观、简便的逐次求导方法。
In this paper, the parametric equation and radiation field formulas for a parabolic torus reflector antenna are given.
本文给出了抛物环面天线的参数方程和辐射场公式。
This paper describes the geometric meaning for the parametric equation of hyperbola and parabola, respectively (see examples 2 and 3).
本文将分别对双曲线、抛物线的参数方程阐述几何意义(见例2、例3)。
Based on the parametric equation, an interpolation algorithm for parabola in CNC system is proposed, interpolation time and error are analyzed.
基于参数方程，推导出了CNC系统中抛物线插补的一种方法，并对该算法进行了实时性和误差分析。
Based on this kind of crack element, and by introducing parametric equation of ellipse, a new method for estimating stress intensity factor is proposed.
基于这种裂纹单元，作者引入椭圆参数方程，推出一种计算裂纹前缘点应力强度因子的新方法。
By the solution of the model, a calculating formula of the local dihedral angel of intersecting line and a parametric equation of contacting line are given.
通过对此数学模型的求解，导出了相交双管相贯线上各点局部二面角的计算公式，给出了相交双管装配接触线的参数方程，并解释了其数学本质。
In this paper, the symmetry of curved lined given by parametric equation and polar coordinates equation is discussed and the sufficient conditions are given.
本文讨论了参数方程和极坐标方程表示的曲线的对称性，给出了判定这两种曲线的对称性的充分条件。
When a inverse function of monotone function can not show the explicit formula, the distribution density curve of continuous randon variable can be gained with a parametric equation.
当单调函数的反函数不能显性表示时，连续型随机变量的分布密度曲线仍可通过参数方程的形式获得。
When a inverse function of monotone function can not show the explicit formula, the distribution density curve of continuous randon variable can be gained with a parametric equation.
当单调函数的反函数不能显性表示时，连续型随机变量的分布密度曲线仍可通过参数方程的形式获得。
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