正切近似法

By introducing non-relativistic, adiabatic and quantum approximation to NLCMEs in the FBG with hyperbolic tangent apodization, and assuming the soliton as a particle with low velocity and invariant energy, the track equation of soliton is obtained.

利用双曲正切中间变迹光栅中的NLCME，引入非相对论-绝热-准量子近似法，将光栅孤子作为一个低速运动且能量守恒的整体进行分析，得到了孤子的轨迹方程。

After several years analysis and research in practice,this paper uses approximate equilateral triangle method,by the way of sine theorem,last according to tagent formule to calculate the REM ,this method is ssimple,its accuracy is high,the method applies to any circumstance to measure REM .

本文经过实践多年分析研究，采用近似正三角形法通过正弦定理、长边推短边，最后按正切公式让算获得悬高，方法简便，精度高，适用于任何条件下的悬高测量。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。