The design of code loop is the key point in the ranging system. And the choice of its parameter greatly affect the tracecurve.
码跟踪环的设计是伪码测距系统的一个关键环节，其参数的选择对环路跟踪曲线影响很大。
2
When the point moves along the plane curve , the tracecurve of the point is called the evolute of the curve , denoted by, and is called the involute of the curve .
当点沿曲线移动时，相应的曲率中心的轨迹曲线称为曲线的渐屈线，而曲线称为曲线的渐伸线。
3
With dynamic optical theory, the image motion compensating group formula of the zoom optical system is derived, and the tracecurve of the image motion compensating group is plotted.