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   98篇
  免费   3篇
  101篇
  2023年   1篇
  2020年   2篇
  2019年   1篇
  2018年   3篇
  2017年   1篇
  2016年   3篇
  2015年   2篇
  2014年   1篇
  2013年   28篇
  2012年   1篇
  2011年   4篇
  2010年   4篇
  2009年   2篇
  2008年   2篇
  2007年   3篇
  2006年   4篇
  2005年   2篇
  2004年   1篇
  2003年   1篇
  2002年   6篇
  2001年   4篇
  2000年   4篇
  1999年   1篇
  1998年   2篇
  1997年   2篇
  1995年   3篇
  1994年   2篇
  1990年   1篇
  1989年   1篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1984年   1篇
  1978年   1篇
  1971年   1篇
  1968年   1篇
  1965年   1篇
排序方式: 共有101条查询结果,搜索用时 15 毫秒
1.
Schmidt, R., March 2007. Australian Cenozoic Bryozoa, 2: Free-living Cheilostomata of the Eocene St. Vincent Basin, S.A., including Bonellina gen. nov. Alcheringa 31, 67-84. ISSN 0311-5518.

Free-living bryozoans are diverse in the Eocene sediments of the St. Vincent Basin, South Australia. They include Bonellina pentagonalis gen. et sp. nov., Otionellina sp. cf. O. exigua (Tenison Woods), Otionellina sp. cf. O. cupola (Tenison Woods), Tubiporella magna (Tenison Woods), Celleporaria nummularia (Tenison Woods), and an indeterminate species only found as moulds. This diversity and abundance is highest in the sediments representing the initial transgressive marine facies, where they occur in ‘sand fauna’ bryozoan assemblages (e.g. with Melicerita and Siphonicytara). Free-living bryozoans decrease up-section and are absent from latest Eocene sediments, indicating a significant environmental shift.

Rolf Schmidt [rschmid@museum.vic.gov.au], Museum Victoria, Melbourne, Vic 3001, Australia; received 18.3.2005, revised 14.12.2005.  相似文献   
2.
The development of economic, ecological, social, cultural and political conditions has a lasting influence on the development of individual regions and economic areas, and is in turn influenced by them. Background conditions in Germany have changed over the last few years, with reunification and the upheavals in Eastern Europe, the prospective completion of the Singh European Market and the increasingly insistent new challenges in the areas of the environment and transport. This paper gives some examples of the changes taking place in some of these background conditions, and discusses their foreseeable future regional impacts in the FRG. In the last 10 years, Baden‐Württemberg in south‐west Germany has been considered as one of the most successful examples in Europe of regional structural adaptation combined with a dynamic innovation system. The characteristics of the economic development of this region and their causes are dealt with.  相似文献   
3.
This study essentially pursues two goals. The first consists in investigating to what extent current methods of assessing the success of technology policies are applicable to the specific instrument of the innovation centre (IC). The deliberations made in this context are of an exploratory nature, since instruments specifically for the purpose of conducting regional economic analyses of the effectiveness of ICs have not yet been fully developed. Secondly, the methodological approach to a comprehensive empirical impact analysis of German ICs is discussed. A survey conducted to this effect by the Department of Economic Geography at the University of Hannover was recently concluded with an encouraging feedback. First results in the form of a comparison of East and West Germany are presented here.  相似文献   
4.
During the past decade research into the German Final Paleolithic and Mesolithic has experienced an important revival. One clear sign of this renewed interest in the periods are the annual meetings of the Arbeitsgruppe Mesolithikum (Mesolithic Working Group) which have taken place every spring since 1992. At these meetings, which take place at changing venues, topical themes of Final Paleolithic and Mesolithic interest are presented by informal lectures and it is also possible to study regional collections (artifacts, raw materials) at first hand. Numerous contributions were subsequently published together in one volume (Conard and Kind (1998) Aktuelle Forschungen zum Mesolithikum/Current Mesolithic Research, Mo Vince, Tübingen). The present paper intends to complement that collection of papers with a synthesis of developments and perspectives and to present recent research highlights in the German Final Paleolithic and Mesolithic, together with a comprehensive bibliography, to a wider international audience.  相似文献   
5.
Regional biofacies analysis has been neglected in biostratigraphic studies of the Cambrian-Ordovician boundary interval. Cluster analysis of relative abundance data of trilobites in thirty-seven large collections from ten localities in North America outlines eleven biofacies in the mid-Trempealeauan to early Tremadocian interval. The biofacies are largely lithofacies-specific and are differentiated at generic and familial levels. The composition of trilobite zonal associations in the boundary interval is controlled principally by the sequence of biofacies. Available trilobite zonal schemes can be used only within single lithofacies. The biofacies patterns and faunal dynamics across the upper boundary of the Ptychaspid Biomere do not support hypotheses requiring catastrophic events. In coherence and geographic distribution, Late Cambrian trilobite biofacies are similar to post-Cambrian benthic biofacies.  相似文献   
6.
Knowledge intensive business services (KIBS) are believed to be one of the main drivers of technological change, innovation, and economic progress. Although firm foundations play a crucial role among KIBS, entrepreneurship research has hardly ever investigated the sector. As firm founders in early stages of their firms' development mostly draw on regional resources, and as the provision of the services is an interactive process, “proximity” between the different actors of the particular territorial innovation and production system clearly matters. This contribution analyses the interrelationships between KIBS foundations and their respective innovation and production systems by performing qualitative and conceptual in-depth studies of three German metropolitan regions.  相似文献   
7.
8.
Archaeological fish bones reveal increases in marine fish utilisation in Northern and Western Europe beginning in the 10th and 11th centuries AD. We use stable isotope signatures from 300 archaeological cod (Gadus morhua) bones to determine whether this sea fishing revolution resulted from increased local fishing or the introduction of preserved fish transported from distant waters such as Arctic Norway, Iceland and/or the Northern Isles of Scotland (Orkney and Shetland). Results from 12 settlements in England and Flanders (Belgium) indicate that catches were initially local. Between the 9th and 12th centuries most bones represented fish from the southern North Sea. Conversely, by the 13th to 14th centuries demand was increasingly met through long distance transport – signalling the onset of the globalisation of commercial fisheries and suggesting that cities such as London quickly outgrew the capacity of local fish supplies.  相似文献   
9.
Reviews     
Australian

Bateman W. R. G. and Ward M. W. (eds), Australia's Offshore Maritime Interests, Canberra, Australian Centre for Maritime Studies, 1985, pp. 122. $15.00 (paper)

Stephen Castles, Mary Kalantzis, Bill Cope and Michael Morrissey, Mistaken Identity: Multiculturalism and the Demise of Nationalism in Australia, Sydney, Pluto Press, 1988, pp.152. $14.95 (paper)

Roger Gibbins, Federalism in the Northern Territory; Statehood and Aboriginal Political Development, Darwin, North Australia Research Unit, Australian National University, 1988, pp. 148. $14.00 (paper)

Dean Jaensch and Peter Loveday (eds), Challenge From The Nationals: The Territory Election 1987, Darwin, North Australia Research Unit, Australian National University, 1987, pp. 226. $20.00 (paper)

Constance Lever‐Tracy and Michael Quinlan, A Divided Working Class, London, Routledge & Kegan Paul, 1988, pp. 338. $29.95 (paper)

Peter Loveday and Peter McNab (eds), Australia's Seventh State, Darwin, The Law Society of the Northern Territory and the North Australia Research Unit, Australian National University, 1988, pp.322. $24.00 (paper)

Geoffrey Skene, Specialities of the House, Department of the Parliamentary Library/Australasian Political Studies Association, 1988, pp.59. $10.00 (paper)

Comparative and international

Chris Bellamy, The Future of Land Warfare, London and Sydney, Croom Helm, 1987, pp.302. £29.95 (cloth)

Cathy Downes Strategic and Defence Studies Centre Research School of Pacific Studies The Australian National University

Melanie Beresford, Vietnam: Politics, Economics and Society, London, Frances Pinter, 1988, pp.242. $19.95 (paper)

Vernon Bogdanor (ed.) Constitutions in Democratic Politics, Gower, for the Policy Studies Institute, Aldershot, 1988, pp.395. $59.00 (cloth)

Barry Coldrey, Faith and Fatherland: The Christian Brothers and the Development of Irish Nationalism 1838–1921, Dublin, Gill and Macmillan, 1988, pp. 338. £27.50

John Connell, New Caledonia or Kanaky? The Political History of a French Colony, Canberra, Australian National University, National Centre for Development Studies, Pacific Research Monograph No. 16,1987, pp.493. $25.00 (paper)

Michael Spencer, Alan Ward and John Connell (eds), New Caledonia: Essays in Nationalism and Dependency, St Lucia, University of Queensland Press, 1988, pp.253. $ 19.95 (paper)

Leon Epstein Political Parties in the American Mold, Wisconsin, University of Wisconsin Press, 1986, pp. 440. $US27.00 (cloth).

Keith Ewing, The Funding of Political Parties in Britain, Cambridge, U.K., Cambridge University Press, 1987, pp. 264. $70.00 (cloth)

Richard Higgott (ed.), New Directions in International Relations? Australian Perspectives, Canberra, Department of International Relations, Australian National University, 1988, pp. 223. $10.00 (paper)

Michael J Sheehan, Arms Control; Theory and Practice, Oxford, Basil Blackwell, 1988, pp. 188. $34.95 (paper)

Political theory and methodology

Boris Frankel, The Post‐Industrial Utopians, Cambridge, Polity Press, 1987, pp. 303. $29.95 (paper)

P. Gottfried and T. Fleming The Conservative Movement. Boston, Twayne Publishers, 1988, pp.125. US$7.95 (paper)

Peter C. Ordeshook, Game Theory and Politics: An Introduction, New York, Cambridge University Press, 1986, pp.511. $47.00 (paper)

A. Teichova, M. Levy‐Leboyer & H. Nussbaum (eds), Multinational Enterprise in Historical Perspective, Cambridge, Cambridge University Press, 1986, pp. 396. $107.00 (cloth).  相似文献   

10.
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