In this paper, a new family of Cassinian wave-guides is proposed, simulating and calculation are finished with CST Microwave Studio that based on Finite Integral Technique (FIT), and some results are given. Electromagnetic field mode type of it

最小二乘拟合直线，通过一些测量数据拟合成一条直线 -Least-squares fitting a straight line, fit a straight line through measurement data

读取txt文件中的经纬度数据，先去除重复的数据，然后计算多点距离，将适合的点保存在Excel文件中-Txt file to read the latitude and longitude data to remove duplicate data, and then calculate the multi-point distance that will fit the latitude and longitude points stored in the Excel file

线性度检测,可以对传感器的采集性能进行检测和拟合，知道修改。-Linearity detection, can detect the performance of the sensor to detect and fit, know the changes。