Trends in gravity changes from 2009 to 2013 derived from ground-based gravimetry and GRACE data in North China

North China is a key region for studying geophysical progress. In this study, ground-based and Gravity Recovery and Climate Experiment（GRACE） gravity data from 2009 to 2013 are used to calculate the gravity change rate（GCR） using the polynomial fitting method. In general, the study area was divided into the Shanxi rift, Jing-Jin-Ji（Beijing-Tianjin-Hebei Province）, and Bohai Bay Basin（BBB） regions. Results of the distribution of the GCR determined from ground-based gravimetry show that the GCR appears to be ＂negativepositive-negative＂ from west to east, which indicates that different geophysical mechanisms are involved in the tectonic activities of these regions. However, GRACE solutions are conducted over a larger spatial scale and are able to show a difference between southern and northern areas and a mass redistribution of land water storage.

国家自然科学基金学科规划对学科发展的影响:基于文献计量的分析与思考

自20世纪50年代中国制定第一个科技发展规划,即《1956~1967年全国科学技术发展远景规划》以来,中国一直使用“规划模式”来推动科学技术的发展[1].国家自然科学基金委员会(以下简称基金委)是我国科学研究的重点资助单位.在中国的科技资助体系中,基金委有其独特的资助格局和规划路径,重点支持基础研究,同时又面向国家重大需求.为了使学科发展能更及时地适应时代的发展与变化、并更精准地契合国家重大需求。