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   7834篇
  免费   434篇
  2023年   57篇
  2020年   149篇
  2019年   200篇
  2018年   308篇
  2017年   277篇
  2016年   340篇
  2015年   221篇
  2014年   211篇
  2013年   2080篇
  2012年   240篇
  2011年   266篇
  2010年   254篇
  2009年   231篇
  2008年   206篇
  2007年   205篇
  2006年   172篇
  2005年   112篇
  2004年   102篇
  2003年   99篇
  2002年   113篇
  2001年   147篇
  2000年   108篇
  1999年   115篇
  1998年   92篇
  1997年   82篇
  1996年   86篇
  1995年   70篇
  1994年   59篇
  1993年   72篇
  1992年   71篇
  1991年   60篇
  1990年   61篇
  1989年   57篇
  1988年   52篇
  1987年   60篇
  1986年   61篇
  1985年   70篇
  1984年   79篇
  1983年   84篇
  1982年   69篇
  1981年   67篇
  1980年   66篇
  1979年   61篇
  1978年   66篇
  1977年   67篇
  1976年   61篇
  1975年   71篇
  1974年   42篇
  1973年   38篇
  1972年   41篇
排序方式: 共有8268条查询结果,搜索用时 15 毫秒
971.
Work hard, play hard: selling Kelowna, BC, as year-round playground   总被引:1,自引:1,他引:0  
A keen interest in place making and place selling is widespread in contemporary society. While the bulk of academic research has focused on studying the restructuring of large urban conglomerates, places beyond the exploding metropolis, by comparison, have received little attention, especially when it concerns Canadian landscapes. In an attempt to study the particularities of place making in contemporary smaller, more isolated communities—hinterlands—this work analyses the city of Kelowna, in British Columbia, Canada. We argue that historically Kelowna, a small rural community specialising in ranching, forestry and fruit production, since the early 1980s, has been re-imagined and re-designed, on the one hand as an all-year playground and as an innovative frontier for high-tech industries; on the other hand, this post-Fordist reinvention contains a discourse of 'whiteness', one that entices by packaging 'place' in terms of 'sameness' and 'familiarity'. In contrast to large cosmopolitan post-industrial cities, hinterland-type cities are invented, sought and lived as geographies cleared from the 'elements' that make cities 'unsafe'.  相似文献   
972.
One of the paradoxical effects of the 7 July bombings in London was to expose the ambivalence in the British government's attempt to wage war on terror by forcefully prosecuting war against those who resort to jihad abroad, actively participating in coalitions of the willing whether in Afghanistan or Iraq, while affording some of Islamism's key ideologists and strategists a high degree of latitude in the United Kingdom itself. This indicates a number of contradictions in official policy that simultaneously recognizes the globalized threat from violent Islamic militancy while, under the rubric of multiculturalism, tolerating those very strains of Islamist radicalism, some of which draw upon the interdependent and transnational character of conflict, to render the UK vulnerable to those very same violent forces. Consequently, the British authorities displayed a studied indifference towards this developing transnational phenomenon both during the 1990s and in some respects even after the London bombings. To explore the curious character of the government's response to the Islamist threat requires the examination of the emergence of this radical ideological understanding and what it entails as a reaction to modernization and secularism in both thought and practice. The analysis explores how government policies often facilitated the non-negotiable identity politics of those promoting a pure, authentic and regenerated Islamic order both in the UK and abroad. This reflected a profound misunderstanding of the growing source and appeal of radical Islam that can be interpreted as a consequence of the slow-motion collision between modernity in its recent globalized form and an Islamic social character, which renders standard western modernization theory, and indeed, the notion of a 'social science' itself, deeply questionable.  相似文献   
973.
This article reviews western donor support for building African peace and security architecture, specifically in relation to G8 efforts to engage in the capacity-building process in line with commitments made in the Joint Africa/G8 Plan to Enhance African Capabilities to Undertake Peace Operations (the Joint Plan)—agreed between G8 and key African leaders at the G8 Summit in Evian in 2003. It describes a project by the New Security Issues Programme at Chatham House, carried out jointly with the Peace and Security Programme at the United Nations Association-UK and the Institute for Security Studies in Pretoria, to provide strategic input into implementing the Joint Plan. The article outlines the background to western involvement in peace and security capacity-building in Africa, the nature and current status of the African peace and security architecture and some key challenges to the G8/Africa capacitybuilding process—particularly African institutional human resource capacity and coordination among the various players involved. Finally, it maps out potential priorities for future progress in taking the capacity-building process forward.  相似文献   
974.
Abstract. This paper examines the initial location choice of legal employment‐based immigrants to the United States using Immigration and Naturalization Service data on individual immigrants, as well as economic, demographic, and social data to characterize the 298 metropolitan areas we define as the universal choice set. Focusing on interactions between place characteristics and immigrant characteristics, we provide multinomial logit model estimates for the location choices of about 38,000 employment‐based immigrants to the United States in 1995, focusing on the top 10 source countries. We find that, as groups, immigrants from nearly all countries are attracted to large cities with superior climates, and to cities with relatively well‐educated adults and high wages. We also find evidence that employment‐based immigrants tend to choose cities where there are relatively few immigrants of nationalities other than their own. However, when we introduce interaction terms to account for the sociodemographic characteristics of the individual immigrants, we find that the estimated effects of location destination factors can reverse as one takes account of the age, gender, marital status, and previous occupation of the immigrants.  相似文献   
975.
976.
There is a growing movement toward collaborative stakeholder participation in environmental policy. Rather than calling for a reliance on government officials to solve environmental problems, this approach calls for empowering a community of stakeholders to contribute meaningfully. Scholars examining citizen participation have investigated the performance of such efforts. This study examines one important aspect of performance, the impact of stakeholder participation on policymaking at the local level. A multiple‐case analysis of county‐level, community‐based task forces working on farmland preservation planning in Ohio, U.S., reveals patterns of policymaking processes and the near‐term impacts of collaborative planning. These patterns are linked to scholarship using prior empirical studies as well as the Institutional Analysis and Development framework, which integrates physical, social, and institutional variables to examine collective decision‐making related to natural resources. Results indicate that the degree of policy change is associated closely with local contextual factors, rather than internal group factors often emphasized in studies of citizen advisory committees and collaborative groups.  相似文献   
977.
Twenty-one samples of likely Roman, likely Islamic and unknown common ware from the archaeological site of Thamusida (Rabat, Morocco) were analysed in order to anchor selected types of pottery to a limited time span and, possibly, to a production area and technology. Analytical techniques were thermoluminescence, optical microscopy, scanning electron microscopy and X-ray fluorescence. The results arising from this research are definitely useful for the study of the site of Thamusida as well as for all researchers involved in archaeological and archaeometrical research in Morocco. Chronologies proposed on a typological base have been denied twice: a likely Islamic cup dates back to the second century a.d.; vice versa, a stewpot, framed into the Roman period, resulted to be an eighth century a.d. production. Moreover, the identification of an eighteenth century ceramic production is of outstanding importance, as it characterises a completely unknown production. Regarding the production area, four samples of both Roman and Islamic periods have been recognised as local productions of Thamusida.  相似文献   
978.
979.
U‐series dating was used to determine the growth rate of a feldspar‐to‐clay weathering rind in a mid‐Holocene Cascade–Olcott tradition andesite core, and luminescence dating (last exposure to sunlight) was used to date fine‐grained feldspars scraped from the surfaces of similar buried artefacts from a 14C‐sediment‐dated archaeological site (45KI464) on the wet western slope of the Cascade Mountains of Washington. For U‐series dating, we measured 226Ra excess (226Ra excess =226Ra –230Th) in five stratigraphic depth controlled rind scrapings. 238U, 232Th and 230Th were counted by alpha spectrometry, and 226Ra and 210Pb were counted by gamma spectrometry on each sub‐sample.  相似文献   
980.
Previously published data on the chemical compositions and microstructures of copper‐ and cobalt‐blue frit, glass and faience from the New Kingdom site of Amarna in Egypt ( Shortland 2000 ) are summarized. The data are then used to infer the raw materials and processes employed in the production of these vitreous materials. The results suggest that crushed quartz pebbles were the source of the quartz for all the materials, but that different sources of alkali, both natron and a range of plant ashes, were used in the production of each material. It seems probable that the cobalt‐rich alum colorant was pre‐treated before use by precipitating cobalt hydroxide from a solution of the alum by the addition of natron. It is further hypothesized that cobalt‐blue glass was produced by melting the cobalt‐blue frit together with additional plant ash and possibly quartz. Finally, it is suggested that, in glazing the cobalt‐blue Variant D faience first produced in the 18th Dynasty, the efflorescence or application method was selected according to object type.  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