id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
esrj-87228	Wang, Jianmin; Xie, Dongping	GPS elevation fitting study based on ternary polynomial regression	2020	6	.pdf	application/pdf	3081	160	57	The traditional methods include weighted average method, plane fitting method, quadratic polynomial surface fitting method, moving quadratic polynomial surface fitting method and cubic polynomial surface fitting method, and the new models include neural network fitting method, support vector machine fitting method and curve cloud model fitting method (Zhang et al., 2015; At present, through the research of some scholars, the methods of fitting GPS elevation data can be roughly divided into two categories.	cache/esrj-87228.pdf	txt/esrj-87228.txt