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   2572篇
  免费   91篇
  2023年   10篇
  2020年   36篇
  2019年   48篇
  2018年   78篇
  2017年   91篇
  2016年   90篇
  2015年   62篇
  2014年   74篇
  2013年   708篇
  2012年   63篇
  2011年   74篇
  2010年   65篇
  2009年   81篇
  2008年   81篇
  2007年   50篇
  2006年   49篇
  2005年   58篇
  2004年   45篇
  2003年   43篇
  2002年   49篇
  2001年   46篇
  2000年   41篇
  1999年   27篇
  1998年   40篇
  1997年   36篇
  1996年   26篇
  1995年   24篇
  1994年   30篇
  1993年   27篇
  1992年   17篇
  1991年   23篇
  1990年   22篇
  1989年   17篇
  1988年   17篇
  1987年   24篇
  1986年   26篇
  1985年   26篇
  1984年   41篇
  1983年   30篇
  1982年   32篇
  1981年   20篇
  1980年   22篇
  1979年   30篇
  1978年   16篇
  1977年   25篇
  1976年   18篇
  1975年   20篇
  1974年   15篇
  1972年   11篇
  1970年   8篇
排序方式: 共有2663条查询结果,搜索用时 15 毫秒
1.
2.
3.
The pro‐life movement regularly employs tactics of political harassment in its campaign against abortion. As the murder of the controversial abortion doctor George Tiller in Wichita, Kansas, demonstrated last year, such tactics often betray a potential for violence. This paper explores how the militant tactics of the pro‐life movement in the 1990s have contributed to the formation of a ‘new’ political identity in Kansas politics: that of the moderate Republican. But for those that seek to counter‐mobilize against the Christian right, the political stakes remain high.  相似文献   
4.
5.
We apply X-ray fluorescence (XRF) geochemical analysis to a collection of 'Opunohu Valley lithic artifacts from Mo'orea island to investigate the local scale of raw material procurement, adze production, use, and exchange within the Society Island archipelago. We use these data to document the distribution of non-local versus local volcanic artifacts in 'Opunohu Valley house sites, ritual sites, and specialized sites, as a means for establishing intra-site production and consumption patterns, and access to exotic, possibly superior, stone resources, and how these two themes correlate with site function or household wealth and status. Overall, 30% of the artifacts analyzed via WDXRF derive from non-local sources, notably two other islands in the archipelago outside of the political boundaries of Moorean chiefdoms. Our case study thus provides the first direct material evidence of intra-archipelago trade and exchange in the Society Islands. Intra-archipelago trade in adzes was certainly in place by as early as A.D. 1350, if not earlier, and continued up until the time of European contact. In addition, our analyses have identified a local adze production locale in the Afareaitu district of Mo'orea island. The patterns of local versus non-local adze production and exchange strongly suggest that dual interaction spheres were involved. The correlation between adzes and adze-related debris produced from off-island sources and sites with specialized use, which were often reserved for the social, ritual, and political elites in Ma'ohi society suggests that some of the exotic adzes derived from gift exchange between Mo'orea and ruling elites in Tahiti and the Leeward Islands. These adzes from afar would have solidified socio-political and ideological alliances between elites in the Windward and Leeward sectors of the archipelago.  相似文献   
6.
ABSTRACT. In this paper the impact of spatial and nonspatial variables on the innovation potential and innovativeness of (small) industrial firms in The Netherlands will be analyzed. Innovation potential and innovativeness will be conceived as latent variables which will be measured by a partial least squares approach. The variables reflecting innovation potential are notably input variables such as internal and external R&D, while innovativeness will be based on output indicators such as the number of product and process innovations. The regional dimension enters our analysis essentially at two levels. First, we will investigate whether more innovative firms are to some extent spatially biased (i.e., on the basis of intrafirm characteristics). Secondly, we will analyze the relevance of an indigenous regional impact, per se. In other words, we will examine whether firms with an equal innovation capacity will differ in actual (i.e., realized) innovativeness as a consequence of different regional conditions. For the first issue, our results indicate that not all regions are equally well-endowed with potentially innovative (small) firms. Our analysis even demonstrates that these firms are underrepresented in regions which are generally considered to offer the most favorable production environment. After compensating for these differences in the composition of the regional set of firms, we demonstrate that an indigenous regional impact per se cannot be identified in The Netherlands.  相似文献   
7.
An axiomatic approach to distance is developed which focuses on those behavioral concepts of distance related to movement in space. In particular, spatial movement by behaving units is postulated to involve a choice from among some set of abstract trips in space, and implicitly, to involve the minimization of some relevant notion of trip costs. In this context, the relevant behavioral notion of distance in space is taken to be the minimum-cost distance generated by this choice process. These trip-cost concepts extend the classical notions of paths, path lengths, and shortest paths in metric spaces. Hence many of the analytical results of the paper involve extensions of classical shortest-path distance properties to minimum-cost distances. In addition to these extensions, a characterization theorem is given which specifies the possible functional relationships between trip costs and their associated path lengths. These relationships include most functional forms which are commonly employed in the literature.  相似文献   
8.
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