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   8861篇
  免费   166篇
  2024年   17篇
  2023年   83篇
  2022年   138篇
  2021年   132篇
  2020年   327篇
  2019年   209篇
  2018年   254篇
  2017年   257篇
  2016年   306篇
  2015年   214篇
  2014年   235篇
  2013年   773篇
  2012年   555篇
  2011年   550篇
  2010年   436篇
  2009年   495篇
  2008年   513篇
  2007年   610篇
  2006年   597篇
  2005年   588篇
  2004年   414篇
  2003年   372篇
  2002年   322篇
  2001年   198篇
  2000年   244篇
  1999年   48篇
  1998年   19篇
  1997年   21篇
  1996年   16篇
  1995年   12篇
  1994年   15篇
  1993年   20篇
  1992年   8篇
  1991年   11篇
  1990年   6篇
  1986年   1篇
  1983年   5篇
  1982年   2篇
  1981年   1篇
  1980年   1篇
  1978年   2篇
排序方式: 共有9027条查询结果,搜索用时 15 毫秒
1.
在明代,由于水患频发和长江主泓变动等原因,湖广武昌府城沿江江岸屡屡崩陷,当地政府遂启动江岸修筑工程。考诸史志,明代武昌府城的江岸修筑主要约有四次,分别是正统七年(1442)、成化三年(1467)、万历十七年(1589)和万历三十四年(1606)。最终修成的江岸,自武昌府城南门望山门外(今武昌解放路南端解放桥附近)起,向西折至江边,又沿江边中经黄鹤矶向下游延伸至坛角地区(今武昌和平大道武汉工人文化宫以西),长约5公里。这条堤岸确定了武昌城沿江江岸的基线,将武昌城的城市空间扩展到江边,并延续至今。  相似文献   
2.
水资源短缺一直制约着京津唐地区经济和社会的发展。20世纪70年代,因缺水引发的经济、社会问题逐渐凸显,促使中央和地方政府开始考虑实施跨流域调水工程。引滦工程作为北方最大的跨流域调水工程,其决策经历了曲折的过程。1958年,北京和唐山曾分别提出引滦河水的设想,唐山还实施了引滦入还和引还入陡工程。1972年,海河流域大旱促使中央做出加快实施引滦工程的决定,但由于地质情况复杂等原因,引滦工程设计方案被反复修改。1981年,天津提出了单独引滦济津路线并得到了中央的支持。引滦工程对缓解京津唐用水紧张发挥了重要作用,天津是引滦工程受益最大的地区。  相似文献   
3.
Population censuses have symbolic and instrumental importance for ethnic, national, linguistic or religious groups and their political representatives. This is particularly apparent in deeply divided societies, where political institutions are designed to accommodate groups through forms of power sharing. Existing literature posits that consociational power-sharing institutions, which are commonly employed to manage inter-group conflict, are likely to incentivise contestation and mobilisation in relation to the census, but this claim has not been tested empirically. Employing the case studies of Bosnia and Herzegovina and Northern Ireland, this article tests a proposition about the relationship between consociationalism and the politics of the census: that it is corporate consociational designs that are likely to result in contestation of the census and mobilisation of groups during enumeration, whereas liberal consociational designs will not. The analysis offers support for this proposition, but also suggests that other features of power-sharing settlements, such as the federal nature of the Bosnian state and the majoritarian provision for a ‘border poll’ in the Northern Irish settlement, also play an important role in shaping census politics. These insights contribute to political geographic debates about the census by highlighting the influence of institutional design on struggles over how and where populations get counted, which are applicable beyond the immediate context of deeply divided societies.  相似文献   
4.
James Hamilton, duke of Hamilton and the Scots jacobites are generally linked in analyses of the final years of the Scots polity. Indeed, Hamilton is often presented as the leader of the jacobite party in the Scottish parliament. Yet both contemporaries and historians have been unsure what to make of his on-again, off-again, conduct with respect to the exiled Stuarts and France. This has fuelled an ongoing debate about Hamilton's erratic and highly enigmatic behaviour during the winter of 1706–7, when the Union was passing the Scottish parliament. Was he genuinely opposing the Union? Was he duped by the court? Or was he, ‘bought and sold for English gold ’? This essay takes a fresh look at the duke and his part in the Union crisis in the light of new and previously underused jacobite sources with a view to better understanding Hamilton's aims, objectives, and influence with this crucial group. Only the jacobites and the Cameronians were potentially willing to take their opposition to the Union to God's Acre. But neither party immediately flew to arms in response to passage of a union they both believed was a betrayal of everything they held dear, and Hamilton was a major factor in their failure to do so. This essay thus takes a close look at the duke's part in preventing a major national uprising against the Union in the winter of 1706–7 and advances a new interpretation of his conduct and significance throughout the Union crisis.  相似文献   
5.
本文对青海古代各历史时期的文化遗址及文物进行了分析与探讨,提出了青海古代文化遗址有着分布的集中性、石器时代的完整性以及多元结构的民族文化特点;论证了以上特点是由地理环境及历史的各民族文化活动所致。  相似文献   
6.
The various scholarly and scientific endeavours — comprising both arts and sciences —, which British statesmen persued in their leisure time, transcend the mere biographical aspect. In the light of the slow, yet steady professionalisation of educational and political institutions, many of them modernised or newly created in order to achieve what came to be called “National Efficiency”, the literary and scientific pastimes of men, like Gladstone, Morley, Salisbury, Balfour or Haldane, seemed soon to become somewhat obsolete. Yet, it is argued, that the often professedly amateurish activities did not merely display the traditional hobby attitude to the sciences, so characteristic of the wealthy aristocrat, but in some cases revealed a good understanding of the scientific and educational needs of society, leading up to their active advancement. The British amateurs, it would seem, were pleading for providing a balanced higher education and training, rather than going for the technical excellence of the political rival Imperial Germany, which dazzled and, at the same time, intimidated some of them.  相似文献   
7.
针对莫高窟在保护利用数据传输过程中出现的问题与发展趋势,提出了利用无线网络深度覆盖技术构建数据传输平台,解决莫高窟大型洞窟内保护利用数据无法传输的问题。为构建实用性强的传输平台,采取了如下措施。首先,针对莫高窟保护利用各项业务数据采集、传输模式、传输机制等各阶段特点,提出了基于无线网络深度覆盖技术构建数据传输试验平台的需求;其次,设计了试验平台构建方案,依据莫高窟洞窟分布与建筑形制确定了试验平台构建位置。结合莫高窟目前无线网络覆盖现状,通过选型分析确定了无线网络深度覆盖关键技术,并应用该技术构建试验平台;最后,对试验平台无线信号覆盖范围、信号强度、传输性能、安全性等进行验证,确保数据传输的完整性与连续性。此试验平台已运行一年有余,应用效果良好。  相似文献   
8.
This article introduces our themed section on The Left(s) and Nationalism(s), which provides a comparative analysis of the relationship between nationalism and different left-wing parties in Western Europe. It highlights the innovative comparative perspectives offered by this themed section, which not only concerns a series of different geographical cases studies but also involves the ideological plurality of the Left. The larger research question that our contributors address is how different left-wing parties have dealt with the inherent ideological tension between the universality claimed by the Left and the particularism inherent in nationalism, as a doctrine and a principle of political legitimacy. The article stresses three main contributions of our themed section: (1) Western European left-wing parties do engage with the themes of nationalism and nationhood, but they often rely on convenient silence to solve some of the contradictions with their progressive ideology. (2) None of these parties have formulated thick versions of the respective national identities. (3) State-wide left-wing parties have used instrumental conceptions of nationhood to address the challenge of separatist parties, but only with mixed results.  相似文献   
9.
Global energy policies embracing a transition to unconventional oil and gas development are hallmarks of many developed nations. Among these, the United Kingdom has framed the development of shale gas as one means to transition from high-carbon fossil-fuel consumption to low-carbon alternatives. Yet the introduction of this industry and recent legislation associated with it have not been without controversy. Communities throughout the United Kingdom are engaged in sustained debates concerning climate change, health, the scale of extraction footprints, securitisation, and governance. Places such as Kirby Misperton, the focus of this article, are representative of many villages where questions abound about the role of justice at all stages and scales of governmental decision-making. Using a legal geographic lens, this article examines narratives among local residents who are actively resisting the arrival of unconventional gas. I consider how the relationships between and among energy transition, policy, and justice have been interpreted by communities and argue for inequity and risk to be addressed in more transparent ways. I contend that highlighting counter-narratives remains essential if powerful arguments by governments and others are to be negated. Fundamentally, true justice can only prevail when all stakeholders are considered legitimate and their opinions valid.  相似文献   
10.
Recent studies have warned about the close relationship between populism and nationalism. This article offers an empirical contribution to the examination of this relationship by analysing the presence of populist and nationalist elements in the official speeches of the outgoing Brazilian president Jair Bolsonaro. We make two contributions to this expanding literature. First, we show that the supposed ambiguity between populism and nationalism can be resolved by an approach that clearly separates the two concepts. Second, we find that Bolsonaro is more populist than nationalist. His populism has elements in common with other European populist leaders (attacking political parties and the political class), but he distances himself from them by presenting authoritarian traits. Nativism is completely absent (unlike in Europe), but ‘sovereignism’ (‘us’ vs. ‘other nations or institutions’) and ‘civilisationism’ (‘us’ vs. ‘minorities’) sometimes overlap with populism. We conclude that a tension exists between populism and nationalism that can endanger the ‘good’ relationship between the populist leader and their supporters. This is something that future research on populism should consider.  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