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   496篇
  免费   18篇
  2023年   3篇
  2022年   4篇
  2021年   3篇
  2020年   5篇
  2019年   17篇
  2018年   19篇
  2017年   18篇
  2016年   25篇
  2015年   15篇
  2014年   15篇
  2013年   123篇
  2012年   9篇
  2011年   12篇
  2010年   8篇
  2009年   14篇
  2008年   20篇
  2007年   17篇
  2006年   10篇
  2005年   13篇
  2004年   8篇
  2003年   8篇
  2002年   6篇
  2001年   6篇
  2000年   7篇
  1999年   11篇
  1998年   3篇
  1997年   10篇
  1996年   4篇
  1995年   2篇
  1994年   8篇
  1993年   5篇
  1992年   6篇
  1991年   2篇
  1990年   6篇
  1989年   2篇
  1988年   4篇
  1987年   3篇
  1986年   6篇
  1985年   6篇
  1984年   4篇
  1983年   9篇
  1982年   2篇
  1981年   5篇
  1980年   4篇
  1979年   4篇
  1978年   3篇
  1977年   5篇
  1976年   3篇
  1975年   5篇
  1959年   2篇
排序方式: 共有514条查询结果,搜索用时 15 毫秒
91.
Dermal denticles of two thelodont agnathans, Australolepis seddoni gen. et sp. nov., and a possible nikoliviid gen. et sp. indet. are described from the Gneudna Formation, a marine sequence of interbedded limestone and shale exposed on the eastern edge of the Carnarvon Basin, Western Australia. The age and significance of these new forms are discussed. The Gneudna Formation is Late Devonian, probably early Frasnian, which, if confirmed, makes these the youngest thelodonts known to date.  相似文献   
92.
93.
94.
The city dashboard has become an integral component of smart city asset management systems. It leverages data collected from multiple sources to monitor performance and enable evidence-based decision making. This article investigates the use of a design thinking framework to develop a functional and easy to understand city dashboard. The Smart Social Spaces project is used as a case study to illustrate how design thinking can be employed to develop an asset management dashboard, enabling efficient management of public space and infrastructure. The article profiles the unique collaboration between a local government, a multi-disciplinary team of university academics, and a street furniture designer and manufacturer, all located in Sydney, Australia. We unpack some of the design practice nuances that led this project to receive national awards and international recognition, and most importantly, created a user-friendly system to track and maintain public micro assets. We conclude with lessons learnt and recommendations for dashboard development through a design thinking process.  相似文献   
95.
96.
97.
Earlier views saw West Africa as culturally stagnant through much of the Holocene until stimulus or intervention from north of the Sahara transformed Iron Age societies. Evidence accumulating over the past 15 years suggests that stone-using societies from 10,000 to 3000 B.P. were far more diverse than previously thought. Against an increasingly detailed record of Holocene climate change, the complexity of local adaptation and change is becoming better understood. Although a strong case currently exists for the introduction of copper and iron to West Africa from the north in the mid-first millennium B.C., the subsequent development of metallurgy was strongly innovative in different parts of the subcontinent. Soon after the advent of metals, a dramatic increase in archaeological evidence for social stratification and hierarchical political structures indicates the emergence of societies markedly more complex than anything currently documented in the Late Stone Age. The best-documented examples come from the Middle Niger region and the Nigerian forest. In these areas, earlier diffusionist models in which complexity originated outside West Africa have yielded to evidence that indigenous processes were instrumental in this transformation. Trade, ideology, climate shifts, and indirect influences from North Africa, including the introduction of the domesticated horse to the Sahelian grasslands, are identified as factors essential to an understanding of these processes.  相似文献   
98.
99.
Book reviews     
John C. Garnett, Commonsense and the Theory of International Politics. Macmillan, London, 1984, pp. x + 153. $14.95

Moshe M. Czudnowski, Political Elites and Social Change. Northern Illinois University Press, Dekalb, 1983, pp. xi + 255. $US 12.50.

J. Breuilly, Nationalism and the State. Manchester University Press. Manchester, 1982, pp. 421. £25.00.

Dudley Seers, The Political Economy of Nationalism. Oxford University Press, Oxford, 1983, pp. xii + 218. $37.50 (cloth), $17.40 (paper).

Otto van den Muijzenberg, Pieter Streefland and Willem Wolters (eds.), Focus on the Region in Asia. Comparative Asian Studies Program, Erasmus University, Rotterdam, 1982, pp. 349. No price given.

Frank Moulaert and Patricia W. Salinas (eds.), Regional Analysis and the New International Division of Labour. Kluwer‐Nijhoff, Boston, 1983, pp. 171. $29.30.

T. Duncan and J. Fogarty, Australia and Argentina: On Parallel Paths. Melbourne University Press, Melbourne, 1984, pp. xiv + 172. $22.50

A. Curthoys and J. Merritt (eds), Australia's First Cold War 1945–1953 vol.1 Society, Communism and Culture. George Allen & Unwin, Sydney, 1984, pp. xiv + 243. $24.95 (cloth), $12.95 (paper).

C. O'Faircheallaigh, Mining and Development. Groom Helm, London and Sydney, 1984, pp. 302. $33.95.

C. O'Faircheallaigh, Host Countries and Multinationals. Canberra Studies in World Affairs No.7. Department of International Relations, Australian National University, Canberra, 1982. pp. 106. $6.00

Anthony Verrier, Through the Looking Glass: British Foreign Policy in the Age of Illusions. Jonathan Cape, London, 1983, pp. x +385. £12.50

Ritchie Ovendale (ed.), The Foreign Policy of the British Labour Governments 1945–1951. Leicester University Press, Leichester, 1984, pp. 198. £15.00.

Bernard Porter, Britain, Europe, the World 1850–1982: Delusions of Grandeur. Allen & Unwin, London, 1983, pp. xv + 178. $27.00

Elim Papadakis, The Green Movement in West Germany. Croom Helm, London and Canberra, 1984, pp. 230. $31.95.

Yoo See‐Hee (ed.), Political Leadership and Economic Development: Korea and China. The Institute for Sino‐Soviet Studies, Hanyang University, Seoul, Korea, 1983, pp. vii + 240. No price given.

Kalyani Bandyopadhyaya, Burma and Indonesia: Comparative Political Economy & Foreign Policy. South Asian Publishers, New Delhi and Madras, 1983, pp. vii + 250. No price given.

Narongchai Akrsanee (ed.), ASEAN‐Japan Relations: Trade and Development. Institute of Southeast Asian Studies, Singapore, 1983, pp. viii + 191. $US15.00.

Sueo Sekiguchi (ed.), ASEAN‐Japan Relations: Investment, Institute of Southeast Asian Studies, Singapore, 1983, pp. viii + 274. $US 16.00.

K.K. Nair, ASEAN — Indochina Relations Since 1975: the Politics of Accommodation. The Strategic and Defence Studies Centre, Australian National University, Canberra, 1984, pp. 239. $10.00

John Drysdale, Singapore: Struggle For Success. George Allen & Unwin Australia, Sydney, 1984. pp. xxiv + 506. No price given.

David Bourchier, Dynamics of Dissent in Indonesia: Sawito and the Phantom Coup. Cornell Modern Indonesia Project, Ithaca, New York, pp. 128. $US9.00.

Tariq Ali, Can Pakistan Survive? Penguin Books, Harmonds‐worth, 1983, pp. 237. $7.95.

Robert C. Marshall, Collective Decision Making in Rural Japan. Michigan Papers in Japanese Studies No. 11, Centre for Japanese Studies, Ann Arbor, 1984, pp. xiii + 178. $US7.00.

Deon Geldenhuys, The Diplomacy of Isolation: South African Foreign Policy Making. Macmillan, Johannesburg, 1984, pp. 295. R 19.95.  相似文献   

100.
An updated analysis of Paleolithic sites in Siberia and the Urals 14C-dated to the coldest phase of the Last Glacial Maximum (LGM), with its timespan currently determined as ca. 23,000–19,000 BP (ca. 27,300–22,900 cal BP), is presented. It is demonstrated that people continuously occupied the southern and central parts of Siberia and the Russian Far East (up to 58° N latitude), and perhaps sporadically settled regions located even further north, up to 70° N, throughout the LGM. This is in accord with our previous data, but is now based on a larger dataset, and also on a paleoecological analysis of the major pre-LGM archaeological sites in Siberia and the Urals north of 58° N. It is clear that Paleolithic people in northern Eurasia were able to cope with the treeless tundra environment well in advance of the LGM, at least at ca. 34,000–26,000 BP (ca. 38,500–30,000 cal BP). Therefore, a high degree of adaptation to cold conditions allowed people to survive in Siberia during the LGM.  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