id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
elp-2472	Shuang-lin, LUO; Min, ZHOU; Chong-tai, TANG	An Analysis of the Trend of China’s Export Trade to the USA Based on R Language	2019	10	.pdf	application/pdf	3589	146	59	At the same www.scholink.org/ojs/index.php/elp Economics, Law and Policy Vol. 2, No. 2, 2019 233 Published by SCHOLINK INC. time, as shown in Figure 4, the time series of total export trade value shows a certain tardiness in autocorrelation and obvious seasonality, i.e., non-stationary. ARIMA model is made up of autoregressive model AR (P), MA (q) and autocorrelation model poor score (d) of three parts, so that half of the ARIMA model has the characteristics of the autoregressive and moving average characteristics of the process, and through poor score (d) let originally non-stationary time series become stable, improve the accuracy of the subsequent forecast.	cache/elp-2472.pdf	txt/elp-2472.txt