Analyzes the factors that influence the stretching changing in the hoisting process and put forward a method that adopting S-curve could reduce the stretching mutation.
分析了提升过程中钢丝绳张力变化的影响因素，提出了采用S曲线速度图是可以减小张力突变的一种方法。
2
This paper introduce the math basis of Elliptic curve cryptography, and it 's cryptosystems, then provide a valid method to compute the order of Elliptic curve.
介绍了椭圆曲线密码体制的数学基础，及其应用模型，并为计算椭圆曲线的阶提出了一个有效的算法。
3
Through thorough analysis on s shape curve and interference distance, both detail calculating method and control flowsheet are provided.