实现JOS分析试验中的功能，使得能够实现计算小数点后面12位，计算误差

本程序结合天体运动学计算立春具体时间，结果以北京时间表示，算法简单，科学可靠，误差小于20分钟。方便程序员们日历相关模块的开发，辅助测命大师们起八柱等。-The program combines object specific time kinematic calculation of the beginning of spring, the results in Beijing, said algorithm is simple, scientific and reliable, the e

有较好的参考价值，IMC-PID是利用内模控制原理来对PID参数进行计算，最小均方误差（MMSE）的算法。-There are good reference value, IMC-PID control principle is to use the internal model to calculate the PID parameters, minimum mean square error (MMSE) algorithm.

该程序用于通过正割方法查找根。该程序在运行时从用户处计算功能，限制和最大误差。(The procedures used by secant method to find the root. The program calculates functions, limits and maximum errors from the user at run time.)