从由曲线普通方程求平面图形面积的公式出发推出在各种情形下由曲线参数方程求平面图形面积的公式。
From commonly used equation of calculating plane figure quadrature, formulas of calculating plane figure quadrature by applying curve parametric equation can be deduced.
由解析曲线任意组合形成的空间复杂曲线上任意点的大地坐标对于各种工程特别是线形工程的设计和施工具有重要意义。
Coordinates of arbitrary point on complex space curves which are composed of segmentaly analytic curves are important for designing and constructing of various engineering projects.
由各种情况的闭环输出曲线和控制量变化曲线分析比较可知，模型算法控制应用与半主动控制系统有着良好的控制性能。
Many simulation curves are given after analyzing those curves we can draw a conclusion that Model algorithm control algorithm can improve the control property of system greatly.
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