首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   1390篇
  免费   32篇
  1422篇
  2024年   12篇
  2023年   40篇
  2022年   18篇
  2021年   15篇
  2020年   61篇
  2019年   53篇
  2018年   133篇
  2017年   102篇
  2016年   82篇
  2015年   77篇
  2014年   65篇
  2013年   220篇
  2012年   69篇
  2011年   61篇
  2010年   56篇
  2009年   57篇
  2008年   46篇
  2007年   52篇
  2006年   27篇
  2005年   29篇
  2004年   8篇
  2003年   22篇
  2002年   17篇
  2001年   22篇
  2000年   10篇
  1999年   13篇
  1998年   5篇
  1997年   8篇
  1996年   8篇
  1995年   9篇
  1994年   3篇
  1993年   4篇
  1992年   4篇
  1990年   2篇
  1989年   2篇
  1987年   2篇
  1986年   1篇
  1982年   1篇
  1981年   1篇
  1979年   1篇
  1957年   1篇
  1952年   1篇
  1950年   2篇
排序方式: 共有1422条查询结果,搜索用时 0 毫秒
191.
<正>In 1952,my father,Xia Chuan,followed the march of the 18th Corps of the People’s Liberation Army (PLA) into Tibet where he developed a deep friendship with t...  相似文献   
192.
193.
This article examines discourses about grassland degradation in China as expressed by herders, government officials and researchers, presenting findings from fieldwork in Xilinguole League, Inner Mongolia. Recognizing degradation discourse and grassland restoration policies as key sites of political contestation, this study does not try to arrive at the scientific facts about degradation, but rather seeks to illuminate the mechanisms by which grasslands are identified as degraded, and the implementation of policies to restore and protect the grasslands. A key finding is that policy outcomes are widely divergent and difficult to predict. This is not merely due to differences among actors in terms of their interests, access to resources, power, values or knowledge, but as much a result of contradictions and tensions inherent in key policy goals, opening up spaces for local resistance as well as selective policy implementation. This highlights the open‐ended and contested nature of China's environmental state project.  相似文献   
194.
195.
196.
197.
Abstract

The central focus of this work is to test a new methodology to measure the impact of the railway on the distribution of population, in this case in Spain. To achieve this, it was necessary to previously integrate data relating to population and railway lines into a geographical information system. The result was a spatial database that includes population data from homogeneous census series obtained for the municipal scale and the evolution of the railway network in service at corresponding points in time. This allowed the authors to apply spatial-temporal analysis. By so doing, this work constitutes an analysis of a new methodology, as they used exploratory spatial data analysis and geographically weighted regression to detect spatial patterns and estimate the influence of the railway and distance from the coast on population change. The results obtained show that the influence of the railway was very pronounced in some areas, while in others it was just one of the factors that could explain major changes in population distribution.  相似文献   
198.
Abstract

The introduction of the railway network brought with it an unprecedented improvement in accessibility. In this work, the authors analyze the evolution of the territorial coverage of the railway network and its influence on the uneven distribution of population. To carry out this research, they used comparable data on total population obtained from census records relating to civil parishes of England and Wales, taken at 10-year intervals from 1871. The hypothesis that they wished to test was that good access to a railway station was related to significant increases in population. This exercise provides a better understanding of regional variations in population growth and allows the authors to identify current differences between urban and rural areas that have resulted from their historical evolution.  相似文献   
199.
200.
This article aims to bridge the gap between media studies and welfare state studies. While media and communications systems are crucial elements in any society, these systems are often not included in studies of the welfare state. Through a discussion of five historical phases in the evolution of Scandinavian societies and media systems, from early democratization in the late 18th century through the ‘golden age’ of the welfare state to the present challenges of globalization, digitization and the fragmentation of social trust, the article discusses the relationships between the two spheres. While Scandinavian communications systems have much in common with those of other Western states, this article argues that they are also products of, and catalysts for, the specific evolution of the Nordic welfare states.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号