全文获取类型
收费全文 | 1459篇 |
免费 | 304篇 |
出版年
2021年 | 16篇 |
2020年 | 13篇 |
2019年 | 102篇 |
2018年 | 74篇 |
2017年 | 72篇 |
2016年 | 128篇 |
2015年 | 90篇 |
2014年 | 88篇 |
2013年 | 313篇 |
2012年 | 89篇 |
2011年 | 99篇 |
2010年 | 74篇 |
2009年 | 51篇 |
2008年 | 69篇 |
2007年 | 68篇 |
2006年 | 48篇 |
2005年 | 26篇 |
2004年 | 40篇 |
2003年 | 32篇 |
2002年 | 24篇 |
2001年 | 25篇 |
2000年 | 33篇 |
1999年 | 9篇 |
1998年 | 15篇 |
1997年 | 22篇 |
1996年 | 13篇 |
1995年 | 16篇 |
1994年 | 14篇 |
1993年 | 6篇 |
1992年 | 7篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1988年 | 2篇 |
1987年 | 9篇 |
1986年 | 3篇 |
1985年 | 4篇 |
1984年 | 5篇 |
1982年 | 5篇 |
1981年 | 3篇 |
1980年 | 8篇 |
1979年 | 5篇 |
1978年 | 6篇 |
1977年 | 6篇 |
1976年 | 5篇 |
1975年 | 2篇 |
1974年 | 6篇 |
1973年 | 2篇 |
1971年 | 2篇 |
1968年 | 1篇 |
1951年 | 1篇 |
排序方式: 共有1763条查询结果,搜索用时 15 毫秒
41.
Barry Hill 《Postcolonial Studies》2015,18(2):145-160
Rabindranath Tagore, whose oeuvre provincialized Europe, thought about the Nation-State’s wars and crimes in ways congruent with that of another man from Calcutta: Radhabinod Pal, the Indian judge at the Tokyo War Crimes Trial. Several themes intersect here. Tagore was prescient about the aeroplane as the colonial vehicle of atrocity in modern war, anticipating the atomic bombs. He began with high hopes for Japan and an Asia that was one, but his story is a transition from innocence to experience of Japan’s militarism. In the face Japanese scorn at his criticisms Tagore expressed a profound moral teaching about defeat, so called, and the extent to which even victorious civilizations might dishonor themselves. Justice Pal, naively thought by the great powers to be an ally in their legal endeavors to ratify a ‘victor’s justice’, arrived in Tokyo in 1946 with a secret weapon strapped to his heart: his faith in ancient Hindu law, which covertly informs the post-colonial tenor of his ‘dissentient’ judgment, first fully published in Calcutta in 1953. The argument here rests, if that’s possible, where Ashis Nandy ends his illuminating essay on Pal: culpability in matters of war is not easily divisible. 相似文献
42.
43.
Biodiversity and Environmental Change: Monitoring,Challenges and Direction edited by D. LINDENMAYER,E. BURNS,N. THURGATE and A. LOWE (eds), CSIRO Publishing,Melbourne, Australia, 2014, xiv + 624 pp,ISBN: 9780643108561 (hardback), AU$120.00 下载免费PDF全文
CATE MACINNIS‐NG 《Geographical Research》2015,53(2):226-227
44.
45.
46.
47.
Latent trajectory models for space‐time analysis: An application in deciphering spatial panel data 下载免费PDF全文
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
48.
Characterization of a Historical Cannonball from the Fortress of San Juan De Ulúa Exposed to a Marine Environment 下载免费PDF全文
M. Hernandez M. Hernandez‐Escampa C. Abreu J. Uruchurtu M. Bethencourt A. Covelo 《Archaeometry》2016,58(4):610-623
Metallurgical analyses and chemical characterizations were carried out on historical cannonballs from the Fortress of San Juan de Ulúa, Veracruz, México. Cannonballs dating from the 18th and 19th centuries share metallurgical characteristics similar to those of material coming from a shipment of ammunition found in the wreck of a sunken French ship from the battle of Trafalgar. The analyses show that the base material is grey cast iron with a carbon equivalent of 4.94 and a ferritic–perlitic matrix, in which the high phosphorus content has led to the formation of iron phosphide compounds in conjunction with a homogeneous distribution of carbon graphite flakes of Type C. In addition, corrosion products from samples revealed the presence of various crystalline iron compounds (X‐ray diffraction), mostly highly chlorinated iron compounds identified as akaganeite. X‐ray fluorescence identified various characteristics of the corrosion products as a function of the sampling depth. FT–IR spectroscopy revealed that the main difference between the corrosion products (internal and external) is determined by the number of organic species. Differential scanning calorimetry corroborated that these corrosion products are thermally stable compounds at elevated temperatures. 相似文献
49.
A Box Containing Carpenter's Accessories from The Akko 1 Shipwreck,Israel: Archaeometallurgical Analysis of Surviving Ironwork 下载免费PDF全文
The Akko 1 shipwreck was an Egyptian armed vessel, built at the beginning of the 19th century. A wooden saw handle and a box containing iron nails and two split pins were discovered towards the stern. Given their function, location and context, these were part of the ship's carpenter's tools and accessories. A methodology was developed for conducting systematic metallurgical analysis in order to understand the manufacturing process of the surviving ironwork items, as well as to enlarge our knowledge regarding ironworking technologies during the early 19th century. Such methodology may assist in the future understanding of the technological evolution of similar wrought‐iron objects. The results demonstrated that the artefacts have a wrought‐iron heterogeneous microstructure and were manufactured by hot‐working prior to surface hardening by pack carburization. 相似文献
50.