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   1411篇
  免费   69篇
  2023年   8篇
  2022年   8篇
  2020年   25篇
  2019年   39篇
  2018年   56篇
  2017年   73篇
  2016年   60篇
  2015年   35篇
  2014年   44篇
  2013年   491篇
  2012年   47篇
  2011年   39篇
  2010年   51篇
  2009年   47篇
  2008年   28篇
  2007年   30篇
  2006年   20篇
  2005年   18篇
  2004年   20篇
  2003年   22篇
  2002年   19篇
  2001年   18篇
  2000年   14篇
  1999年   24篇
  1998年   13篇
  1997年   15篇
  1996年   11篇
  1995年   14篇
  1994年   9篇
  1993年   9篇
  1992年   10篇
  1991年   6篇
  1990年   6篇
  1989年   8篇
  1987年   6篇
  1986年   6篇
  1985年   8篇
  1984年   9篇
  1982年   6篇
  1981年   11篇
  1980年   9篇
  1979年   15篇
  1977年   7篇
  1976年   7篇
  1975年   6篇
  1974年   8篇
  1973年   11篇
  1972年   5篇
  1971年   4篇
  1968年   4篇
排序方式: 共有1480条查询结果,搜索用时 15 毫秒
941.
Culturelink‐first world conference dynamics of communication and cultural change‐the role of networks, Zagreb, Croatia, 8–11 June 1995

Cultural policy—state of the art “taking cultural policy into the 21st century’ Brisbane, Queensland, Australia, 28–30 June 1995  相似文献   
942.
American Robert E. Peary is famous for his claim of being the first person to reach the North Pole. However, too little historical attention has been paid to independent parts of his long exploratory career. A closer examination of one year, 1897, in his two‐decade quest, reveals the substantial difficulties of being an explorer at the turn of the twentieth century. Peary used specially crafted arguments to endear himself to the recently organized but poorly connected professional scientists who proved to be his most earnest, if inconsistent, backers before 1898. Peary worked on the scientists’ behalf to locate, and sometimes create, publishing venues and stateside audiences for them, in exchange for their patronage. The money chase was difficult and time‐consuming, but did more than help the scientists and ensure Peary’s future backing. It introduced him to the young American scientific community, with whom he learned to “sell” the Arctic. Peary also used his scientific credentials to maintain a public image of the Arctic that allowed Americans to celebrate both the rugged hero and cultural superiority in this remote region.  相似文献   
943.
Union General John C. Frémont excited considerable controversy during the Civil War, and not just due to his dubious military competence and early advocacy of emancipation. Many republican‐influenced citizens suspected Frémont of the corrupt misuse of power, and undermining the essential moral basis of the republic. While ultimately his ineffectual generalship might have reassured Northerners that “the Pathfinder” was hardly likely to succeed in his suspected schemes, it is striking that even during the war for national survival, citizens remained deeply concerned with the possible threat of power (particularly in the hands of corrupt, designing men) to liberty.  相似文献   
944.
945.
The remains of shellfish dominate many coastal archaeological sites in the Pacific and provide a wealth of information about economy, culture, environment and climate. Shells are therefore the logical sample type to develop local and regional radiocarbon chronologies. The calibration of radiocarbon (14C) dates on marine animals is not straightforward, however, requiring an understanding of habitat and dietary preferences as well as detailed knowledge of local ocean conditions. The most complex situations occur where terrestrial influences impinge on the marine environment resulting in both the enrichment and depletion of 14C (Ulm Geoarchaeology 17(4):319–348, 2002; Petchey and Clark Quat Geochronol 6:539–549, 2011). A sampling protocol that combines a high-resolution excavation methodology, selection of short-lived samples identified to species level, and a tri-isotope approach using 14C, δ13C and δ18O, has given us the ability to identify 14C source variation that would otherwise have been obscured. Here, we present new research that details high-resolution mapping of marine 14C reservoir variation between Gafrarium tumidum, Gafrarium pectinatum, Anadara granosa, Anadara antiquata, Batissa violacea, Polymesoda erosa and Echinoidea from the Bogi 1 archaeological site, Caution Bay, southern coastal Papua New Guinea. These isotopes highlight specific dietary, habitat and behavioural variations that are key to obtaining chronological information from shell radiocarbon determinations.  相似文献   
946.
The pre-burial history of a partial elasmosaurid plesiosaur skeleton is reconstructed from analysis of the distribution and modification of bones preserved in a calcareous concretionary mass. The specimen lacks the skull, cervical vertebrae, left limb bones and some girdle elements, but the remaining bones are interpreted to have been deposited on the sea floor from a semi-buoyant carcass and their relative positions modified by the action of scavengers. Bioerosive agents caused loss of bone, particularly on joint surfaces and vertebral centra, as the carcass lay exposed on the sea floor, perhaps for several years before burial.  相似文献   
947.
Reviewing the expansion and ultimate demise of the British and French empires, this article takes a long view of globalisation as an integral part of Europe's recent imperial past. The authors’ argument is that these empires were not simply a global phenomenon. Rather, the processes that built and destroyed them were more actively ‘globalising’. In this context, they argue that the rise and fall of the two pre-eminent overseas empires had several globalising effects. These globalising effects include distinct patterns of migration and communication, critical shifts in the movement of goods and capital, new forms of transnational connection, changing conceptualisations of community and individual rights, and discrete forms of violence and conflict that outlasted the ‘formal’ end of empires.  相似文献   
948.
This article demonstrates that US beliefs concerning racial identity guided the Eisenhower administration's encounter with Egypt, Gamal Abdel Nasser, and Arab nationalism during the 1950s. It establishes that US texts propagated certain racial-identity assumptions about Arab peoples. The most important of these included the assertions that Arab peoples were irrational and easily manipulated or deceived. Policy-makers utilised these beliefs to explain and contextualise Arab actions, especially those of Egypt and its Arab nationalist government. Officials within the Eisenhower administration believed that Arab irrationality prompted Egyptian leaders to adopt a neutralist position in the cold war. The assumption that Arabs were susceptible to deception and manipulation convinced policy-makers that this position was unacceptable. The Soviets would ultimately, they believed, prey upon Arab manipulability and subjugate Egypt, the Arab nationalist movement, and the entire Middle East. These concerns made the Eisenhower administration's decision to contain Egypt, Gamal Abdel Nasser, and the Arab nationalist movement seem logical and necessary.  相似文献   
949.
950.
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