Extraction and Dynamic Spatial-Temporal Changes of Grassland Deterioration Research Hot Regions in China

	Extraction and Dynamic Spatial-Temporal Changes of Grassland Deterioration Research Hot Regions in China
	Hu Yunfeng 2; Han Yueqi 2; Zhang Yunzhi 2; Zhuang Yuan 1
刊名	Journal of Resources and Ecology
	2017
卷号	8 期号:4 页码:352
关键词	知识引擎热点分析草地退化区域提取空间分布动态变化
ISSN号	1674-764X
英文摘要	The authors use a web crawler to retrieve all periodical articles from CNKI between the 1950 s and 2016 and then parse the abstracts of 293368 articles about grassland deterioration by word segmentation, location matching and other methods. The authors also construct a research hot regions extraction model of grassland deterioration in China based on a comprehensive research hot regions index of toponyms and then analyze the spatial pattern and dynamic change in research hot regions of grassland deterioration in China. The research shows the following: (1) The spatial heterogeneity of grassland deterioration in China can be effectively described by a model of grassland deterioration based on the comprehensive research hot regions index. (2) The research hot regions of grassland deterioration are mainly distributed in most regions of Inner Mongolia, Xinjiang, Qinghai, Tibet, Gansu and other provinces. The northeastern region of Inner Mongolia (such as Hulunbeier) and the eastern region of Inner Mongolia (such as Xilin Gol, Chifeng and Wulanchabu) are significant hot regions in the study of grassland deterioration. (3) The number of high research hot regions increases from 81 in the 1950 s to 99 in the 2000 s; the area increases from 1.038 million km~2 to 1.146 million km~2. The degree of hot for grassland deterioration research in 197 counties showed an upward trend. This paper also discusses the relationship between the region of research hot regions and the region of grassland deterioration and then indicates the differences between them in time matching, space matching and concept matching.
语种	英语
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/155519]
专题	中国科学院地理科学与资源研究所
作者单位	1.College of Public Administration, Nanjing Agricultural University 2.Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Hu Yunfeng,Han Yueqi,Zhang Yunzhi,et al. Extraction and Dynamic Spatial-Temporal Changes of Grassland Deterioration Research Hot Regions in China[J]. Journal of Resources and Ecology,2017,8(4):352.
APA	Hu Yunfeng,Han Yueqi,Zhang Yunzhi,&Zhuang Yuan.(2017).Extraction and Dynamic Spatial-Temporal Changes of Grassland Deterioration Research Hot Regions in China.Journal of Resources and Ecology,8(4),352.
MLA	Hu Yunfeng,et al."Extraction and Dynamic Spatial-Temporal Changes of Grassland Deterioration Research Hot Regions in China".Journal of Resources and Ecology 8.4(2017):352.