The Temporal Spatial Dynamic of Land Policy in China: Evidence from Policy Analysis Based on Machine Learning

Table 1

Expression and abbreviation.

Expression	Abbreviation
Latent Dirichlet allocation	LDA
Natural language processing	NLP
Support vector machines	SVMs
K-nearest neighbor	KNN
Communist party of China	CPC
Household responsibility system	HRS
Optimal separating hyperplane	OSH
Empirical risk minimization	ERM
Term frequency inverse document frequency	TF-IDF