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   3363篇
  免费   161篇
  2023年   23篇
  2021年   12篇
  2020年   57篇
  2019年   84篇
  2018年   113篇
  2017年   154篇
  2016年   124篇
  2015年   94篇
  2014年   96篇
  2013年   996篇
  2012年   83篇
  2011年   78篇
  2010年   114篇
  2009年   98篇
  2008年   78篇
  2007年   63篇
  2006年   63篇
  2005年   51篇
  2004年   50篇
  2003年   65篇
  2002年   65篇
  2001年   54篇
  2000年   56篇
  1999年   71篇
  1998年   65篇
  1997年   53篇
  1996年   22篇
  1995年   32篇
  1994年   32篇
  1993年   25篇
  1992年   32篇
  1991年   30篇
  1990年   22篇
  1989年   15篇
  1988年   27篇
  1987年   22篇
  1986年   19篇
  1985年   34篇
  1984年   28篇
  1983年   41篇
  1982年   31篇
  1981年   32篇
  1980年   25篇
  1979年   29篇
  1978年   28篇
  1977年   24篇
  1976年   23篇
  1975年   18篇
  1974年   20篇
  1973年   9篇
排序方式: 共有3524条查询结果,搜索用时 15 毫秒
51.
The concept of sustainability has become a significant consideration in planning in Europe and the US. At both the international and the national level, urban planners and policymakers have developed a package of policies designed to produce sustainable growth and development. In transport, this has been interpreted to mean that we need to increase accessibility while we reduce mobility by shifting trips from automobile to walking, bicycle or public transport modes. Using this criteria, the latest Dublin transport plan has been found to be only partially effective. Similar to many American transport plans, the DTI has opted for the infrastructure‐related sustainability policies and avoided the less popular economic disincentives.  相似文献   
52.
The ecologically sustainable development (ESD) process represented a significant attempt by the Commonwealth Government to involve pro-environment and pro-development protagonists in a major environmental consultative forum. The government's inclusion of peak interest organisations into an exclusive consultation process resembles a neo-corporatist approach to interest intermediation. However, neo-corporatist theory has been applied almost exclusively to economic policy areas and interest organisations representing capital, labour and the state. Analysing the involvement of select environmental organisations in the ESD process, this paper argues that neo-corporatist theory can be extended to include non-production-based interest organisations. The implications of environmental organisation participation in a neo-corporatist structure are examined, including a discussion of the tension between neo-corporatist and new social movement theories.  相似文献   
53.
SPATIAL DEPENDENCY OF SEGREGATION INDICES   总被引:3,自引:0,他引:3  
A few researchers have mentioned the scale sensitivity of segregation index, D. In this paper, I discuss analytically and empirically why using large enumeration areal units usually results in low segregation measures, and using small areal units produces relatively high segregation measures. The discussion is also applicable to the multi-group variant of D. A major finding is that if people of the same ethnic groups are positively spatially auto-correlated, increasing the size of areal units of analysis may not lower D initially, because only people of the same group are added. But enlarging the areal units subsequently may include population of other ethnic groups, and therefore could lower D. However, if the boundaries of the larger enumeration units are drawn to include only population of the same group, then D will not change significantly. Both the spatial autocorrelation of ethnic group population and zonal pattern are critical factors in determining the scale sensitivity of D.  相似文献   
54.
The 1689 Toleration Act allowed Protestant dissenters freedom to worship in public, but it was only a limited toleration and dissenters continued to suffer discrimination. This article examines the experience of Quakers in one important area, the Anglican monopoly in teaching. Although the prosecution of unlicensed teachers was patchy, localised, and dependent upon the hostility and zeal of particular individuals, few dissenters escaped harassment. Moreover, Friends appear to have suffered more severely because of the particular dislike that they still provoked and their unwillingness to compromise which often led to imprisonment. The growth in High Church feeling during Anne's reign led to a more rigorous enforcement of the existing statutes and the passing of the Schism Act (1714). The consequences of an Anglican educational monopoly have not been properly considered by historians largely from the assumption that the Schism Act was fatally compromised by the death of Queen Anne, and because little attention has been paid to the continued harassment of dissenters after toleration who attempted to teach. The Schism Act was repealed in 1719, but freedom for Quakers and other dissenters to teach had already been achieved largely through the courts.  相似文献   
55.
56.
57.
An examination of the surface deposit of an Etruscan cup said to have been dug up in Cheshire suggests instead that it had been buried in Italy and brought to England in recent times. The method described here might usefully be employed to assess the provenance of buried artefacts.  相似文献   
58.
ABSTRACT. Average monthly price data from twelve hinterland markets and the Houston port price for wheat are studied in a cointegration framework using the Engle-Granger "two-step" procedure and Johansen's maximum likelihood procedure. Out-of-sample forecasts from an error correction model are compared to those from a vector autoregression fit to levels and a univariate autoregression fit to first differences. This comparison suggests that modeling these (cointegrated) data as a levels vector autoregression, rather than as an error-correction process, results in significantly higher error bias, but lower error variance, at long horizons.  相似文献   
59.
The tremendous fluctuations in public mobilization against United States nuclear weapons policy, a relatively stable policy over four decades, present a difficult riddle to social scientists. Since the dawn of the nuclear age small groups of activists have consistently protested both the content of United States national security policy and the process by which it is made. Only occasionally, however, has this protest spread beyond a handful of relatively marginal groups, generated substantial public support, and reached mainstream political institutions. This article examines the political cycles of peace movement engagement and quiescence, and their relation to external political context, particularly public policy. I begin with a brief review of the relevant literature on the origins of the movements, noting parallels in the study of interest groups. Building on recent literature on political opportunity structure. I suggest a theoretical framework which emphasizes the interaction between activists choices and political context. I then describe the cycles of peace movement activism and quiescence on nuclear weapons issues in the United States using mass media sources to delineate periods of mobilization. I outline a number of policy variables which may help explain protest mobilization. My conclusions address the importance of policy and political context in explaining movement cycles and the potential influence of protest movements on policy.  相似文献   
60.
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