全文获取类型
收费全文 | 961篇 |
免费 | 66篇 |
出版年
2023年 | 6篇 |
2022年 | 3篇 |
2021年 | 4篇 |
2020年 | 21篇 |
2019年 | 38篇 |
2018年 | 41篇 |
2017年 | 60篇 |
2016年 | 59篇 |
2015年 | 39篇 |
2014年 | 27篇 |
2013年 | 221篇 |
2012年 | 29篇 |
2011年 | 38篇 |
2010年 | 34篇 |
2009年 | 31篇 |
2008年 | 36篇 |
2007年 | 24篇 |
2006年 | 17篇 |
2005年 | 16篇 |
2004年 | 19篇 |
2003年 | 19篇 |
2002年 | 26篇 |
2001年 | 19篇 |
2000年 | 14篇 |
1999年 | 10篇 |
1998年 | 13篇 |
1997年 | 16篇 |
1996年 | 4篇 |
1995年 | 6篇 |
1994年 | 8篇 |
1993年 | 10篇 |
1992年 | 8篇 |
1991年 | 4篇 |
1990年 | 10篇 |
1989年 | 5篇 |
1988年 | 10篇 |
1987年 | 9篇 |
1985年 | 9篇 |
1984年 | 6篇 |
1983年 | 8篇 |
1982年 | 8篇 |
1981年 | 3篇 |
1980年 | 7篇 |
1979年 | 5篇 |
1978年 | 5篇 |
1977年 | 5篇 |
1975年 | 4篇 |
1974年 | 2篇 |
1972年 | 2篇 |
1970年 | 2篇 |
排序方式: 共有1027条查询结果,搜索用时 15 毫秒
41.
Mark McConaghy 《亚洲研究评论》2015,39(1):159-161
42.
43.
44.
Latent trajectory models for space‐time analysis: An application in deciphering spatial panel data
下载免费PDF全文
![点击此处可从《Geographical analysis》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Li An Ming‐Hsiang Tsou Brian H. Spitzberg Dipak K. Gupta J. Mark Gawron 《Geographical analysis》2016,48(3):314-336
This article introduces latent trajectory models (LTMs), an approach often employed in social sciences to handle longitudinal data, to the arena of GIScience, particularly space‐time analysis. Using the space‐time data collected at county level for the whole United States through webpage search on the keyword “climate change,” we show that LTMs, when combined with eigenvector filtering of spatial dependence in data, are very useful in unveiling temporal trends hidden in such data: the webpage‐data derived popularity measure for climate change has been increasing from December 2011 to March 2013, but the increase rate has been slowing down. In addition, LTMs help reveal potential mechanisms behind observed space‐time trajectories through linking the webpage‐data derived popularity measure about climate change to a set of socio‐demographic covariates. Our analysis shows that controlling for population density, greater drought exposure, higher percent of people who are 16 years old or above, and higher household income are positively predictive of the trajectory slopes. Higher percentages of Republicans and number of hot days in summer are negatively related to the trajectory slopes. Implications of these results are examined, concluding with consideration of the potential utility of LTMs in space‐time analysis and more generally in GIScience. 相似文献
45.
46.
47.
48.
49.
Mark Ølholm Eaton 《国际历史评论》2019,41(1):58-82
Shortly following Canada's controversial adoption of nuclear weapon roles in NORAD and NATO in 1963, the focus of nuclear debates shifted to the potential impact on Canadian and international security of the construction of US anti-ballistic missile (ABM) systems. This article expands the focus of scholarship on the ABM issue from the political and policy-making settings to include members of the attentive elite and the news media, and finds these groups deeply divided between liberal and conservative internationalists. On the one hand, supporters of liberal internationalism believed that AMB systems would destabilise the international security environment and ultimately increase the likelihood of nuclear war. Conservative internationalists took the opposite position, arguing that the systems represented a necessary addition to the Western nuclear deterrent and would make nuclear war less likely. In other words, the ABM debate exposed deep divisions in Canadian society between those who preferred diplomatic and multilateral versus military means of achieving middle power goals in the international system. 相似文献
50.