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   1043篇
  免费   39篇
  2024年   9篇
  2023年   17篇
  2022年   24篇
  2021年   14篇
  2020年   47篇
  2019年   55篇
  2018年   41篇
  2017年   44篇
  2016年   54篇
  2015年   39篇
  2014年   31篇
  2013年   102篇
  2012年   99篇
  2011年   54篇
  2010年   44篇
  2009年   56篇
  2008年   50篇
  2007年   69篇
  2006年   52篇
  2005年   42篇
  2004年   30篇
  2003年   28篇
  2002年   21篇
  2001年   14篇
  2000年   12篇
  1999年   1篇
  1998年   4篇
  1997年   2篇
  1996年   3篇
  1995年   4篇
  1994年   6篇
  1993年   5篇
  1992年   2篇
  1991年   2篇
  1990年   1篇
  1983年   2篇
  1980年   1篇
  1979年   1篇
排序方式: 共有1082条查询结果,搜索用时 31 毫秒
1.
Qatar, a small Gulf Arab nation with a de facto absolute monarchy, held its first general elections ever for 30 Shura Council seats on October 2, 2021. This marked the first time in Qatar's history that citizens played a more direct role in government, moving beyond symbolic elections. This study aimed to examine the factors likely to have influenced voters' selection of candidates, the key issues that are significant to Qatari citizens, and the possible characteristics of candidates that are deemed essential. While informal conversations are the main method of data collection for this study, social identity theory, specifically group-based models, was used to understand the influences that shape Qatari voters' choices of candidates. Findings indicate that tribe-related and family-connected attributes constitute important influences on voters' choice decisions. Moreover, voters were concerned about candidates' characteristics and the issues and policies candidates deemed important. Discussion and recommendations are provided.  相似文献   
2.
This paper contributes to a critical methodological discussion that has direct ramifications for policy studies: how computational methods can be concretely incorporated into existing processes of textual analysis and interpretation without compromising scientific integrity. We focus on the computational method of topic modeling and investigate how it interacts with two larger families of qualitative methods: content and classification methods characterized by interest in words as communication units and discourse and representation methods characterized by interest in the meaning of communicative acts. Based on analysis of recent academic publications that have used topic modeling for textual analysis, our findings show that different mixed‐method research designs are appropriate when combining topic modeling with the two groups of methods. Our main concluding argument is that topic modeling enables scholars to apply policy theories and concepts to much larger sets of data. That said, the use of computational methods requires genuine understanding of these techniques to obtain substantially meaningful results. We encourage policy scholars to reflect carefully on methodological issues, and offer a simple heuristic to help identify and address critical points when designing a study using topic modeling.  相似文献   
3.
As science becomes an increasingly crucial resource for addressing complex challenges in society, extensive demands are placed upon the researchers who produce it. Creating valuable expert knowledge that intervenes in policy or practice requires knowledge brokers to facilitate interactions at the boundary between research and policy. Yet, existing research lacks a compelling account of the ways in which brokerage is performed to gain credibility. Drawing on mixed‐method analysis of 12 policy research settings, I outline a novel set of strategies for attaining symbolic power, whereby policy experts position themselves and others via conceptual distances drawn between the “world of ideas” and the “world of policy and practice.” Disciplinary distance works to situate research as either disciplinary or undisciplinary, epistemic distance creates a boundary between complex specialist research and direct digestible outputs, temporal distance represents the separation of slow rigorous research and agile responsive analysis, and economic distance situates research as either pure and intrinsic or marketable and fundable. I develop a theoretical account that unpacks the boundaries between research communities and shows how these boundaries permit policy research actors to achieve various strategic aims.  相似文献   
4.
Island peoples around the world remain entangled in colonial processes. Western and metropolitan powers are increasingly deploying discourse of a ‘China threat’ to justify neocolonial entrenchment in the form of greater Western militarisation and economic dominance. In this paper, we investigate how Western and metropolitan powers use the China threat and warnings of economic, environmental, demographic, and military disaster to maintain and deepen colonial influence in former colonies, with special focus on four island states and territories: Guåhan/Guam in Oceania, Kalaallit Nunaat/Greenland in the Arctic, Okinawa in East Asia, and Jamaica in the Caribbean. We undertake this investigation as a means of practicing decolonial political geography, collaborating as a group of scholars from around the world and drawing upon diverse epistemologies and experiences to inform collaborative research and writing. Due to the complexities we have confronted in our efforts to think outside coloniality, this paper foregrounds our decolonial methodology and process, even as we respect our empirical findings.  相似文献   
5.
汉代漆器的剖析   总被引:2,自引:2,他引:0  
通过制备并分析一系列模拟漆膜样品。建立了有助于鉴定汉代漆器成分的剖析方法。经裂解气相色谱、差热分析、色谱一红外联用等现代分析技术对出土的汉代漆器残片样品的综合分析,证实在西汉漆器制造中已使用桐油或其它的添加剂,并依据剖析的结果,对某些汉代漆器的原材料差异作了初步探讨。  相似文献   
6.
7.
Great Basin archaeologists spent the 1970s and most of the 1980s tearing down the Desert Culture hypothesis without presenting compelling means for dealing with the empirical variability that made it untenable. Recent research seeks to understand this variability by examining the effect of key variables in extreme environmental contexts, especially in wetlands and at high altitudes, and by developing and refining models of optimality that anticipate variability as the local expression of general evolutionary ecological principles. Research on intraregional and ethnic variability has lagged behind—the former because it is said to be costly, the latter because it is problematical in theory.  相似文献   
8.
In this work, we apply a systemic approach to the analysis of a particular geographic territory, the industrial district. We are particularly interested in analysing the interaction between the productive-technological environment and the scientific environment by an examination of research contracts and patents. Our analysis shows that R&D activity in the Spanish ceramic tile District Innovation System was mainly conducted by suppliers. Final producers’ innovation efforts were related to non-technological aspects and differentiation.  相似文献   
9.
许多出土饱水木质文物因其降解严重、含水率较高,容易在脱水过程中出现不可逆的收缩变形以及开裂现象,从而遭到严重破坏。因此,饱水木质文物脱水方法的研究是文物保护工作中的重要课题。为探究风冷冷冻法对饱水木质文物脱水的效果,以一批无法复原的出土饱水木质文物为研究对象,在对其材种、含水率、基本密度及化学成分进行了测定和分析后,使用一台风冷电冰箱在-18℃条件下对样品进行了风冷干燥脱水处理,记录脱水时间和脱水效果,并分析了该方法的传质传热特点,证明了风冷干燥法用于饱水木质文物的脱水干燥能够取得良好效果,并且具有对文物干预小、适用性广、操作简便、成本低廉等优点,为饱水木质文物的脱水处理提供了一种新的思路。  相似文献   
10.
ABSTRACT

Regional inequality within Japan has been a key political issue in Japanese politics throughout the entire postwar period. In this analysis, we examine how Japanese parties have positioned themselves on the question of regional inequality, focusing on how the party system response has been shaped by ideas and ideologies. The article analyses two 15-year periods separated by a quarter of a century (1960–75 and 2000–15) during which regional inequalities became a particularly salient and pressing issue. We compare institutional and socioeconomic contexts, broader governing ideas, and policy responses to this issue by major parties in their election platforms (manifestos). We find that party ideology and broader paradigms continued to shape party responses to regional inequality during both periods.  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