Readability Evaluation of Books in Chinese as a Foreign Language Using the Machine Learning Algorithm

Table 2

Sorting results of dimension features of books in foreign languages words of Chinese based on a machine learning algorithm.

Second category		Forth category
Feature	RMSE	Feature	RMSE
A_word frequency	0.258	C_word frequency	0.213
A_level/level total	0.217	B_word frequency	0.204
C_level	0.204	(A + B) _level/level total	0.211
D_level	0.218	D_level	0.202
D_word frequency	0.164	C_level	0.185
(A + B) _level/level total	0.211	D_word frequency	0.167
C_word frequency	0.228	A_level/level total	0.209
B_word frequency	0.209	B_level	0.237
B_level	0.228	(A + B + C) _level/level total	0.217
(A + B + C) _level/level total	0.226	Word frequency total	0.261
All combinations	0.195	All combinations	0.186
Optimal combination	0.146	Optimal combination	0.147