According to the actual situation of sweet potato industry development in Ziyun County, we use SWOT analysis method to conduct strategic analysis on strengths and weaknesses of the internal environment and the opportunities and challenges of the external environment of the sweet potato industry,...

In this paper, we take Guizhou Province (the heart of southwestern Karst region in China) as the research object. By establishing gray forecasting model and time series forecasting model, we conduct the accuracy test on the actual production capacity of land and the forecasted production...

In accordance with population development of Guizhou Province in 1977-2007, this paper adopts natural growth method, model prediction method and gray system GM (1, 1) model prediction method to predict population of Guizhou Province in 2020. On the basis of overall consideration of many factors...