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   28717篇
  免费   262篇
  国内免费   14篇
教育   20983篇
科学研究   2700篇
各国文化   495篇
体育   1685篇
综合类   7篇
文化理论   560篇
信息传播   2563篇
  2021年   159篇
  2020年   284篇
  2019年   395篇
  2018年   2584篇
  2017年   2527篇
  2016年   2023篇
  2015年   471篇
  2014年   543篇
  2013年   3540篇
  2012年   625篇
  2011年   1086篇
  2010年   1162篇
  2009年   764篇
  2008年   1092篇
  2007年   1526篇
  2006年   457篇
  2005年   737篇
  2004年   755篇
  2003年   645篇
  2002年   402篇
  2001年   291篇
  2000年   327篇
  1999年   271篇
  1998年   191篇
  1997年   206篇
  1996年   192篇
  1995年   185篇
  1994年   180篇
  1993年   171篇
  1992年   248篇
  1991年   261篇
  1990年   250篇
  1989年   248篇
  1988年   203篇
  1987年   184篇
  1986年   183篇
  1985年   229篇
  1984年   183篇
  1983年   191篇
  1982年   168篇
  1981年   153篇
  1980年   175篇
  1979年   216篇
  1978年   143篇
  1977年   136篇
  1976年   131篇
  1975年   122篇
  1974年   135篇
  1973年   106篇
  1971年   102篇
排序方式: 共有10000条查询结果,搜索用时 31 毫秒
991.
No matter one’s wealth or social position, all are subject to the threats of natural hazards. Be it fire, flood, hurricane, earthquake, tornado, or drought, the reality of hazard risk is universal. In response, governments, non-profits, and the private sector all support research to study hazards. Each has a common end in mind: to increase the resilience of vulnerable communities. While this end goal is shared across hazards, the conception of how to get there can diverge considerably. The earthquake and hurricane research endeavors in the US provide an illustrative contrast. The earthquake community sets out to increase resilience through a research process that simultaneously promotes both high quality and usable – preparedness-focused - science. In order to do so, the logic suggests that research must be collaborative, responsive, and transparent. Hurricane research, by contrast, largely promotes high quality science – predictions - alone, and presumes that usability should flow from there. This process is not collaborative, responsive, or transparent. Experience suggests, however, that the latter model – hurricane research - does not prepare communities or decision makers to use the high quality science it has produced when a storm does hit. The predictions are good, but they are not used effectively. Earthquake research, on the other hand, is developed through a collaborative process that equips decision makers to know and use hazards research knowledge as soon as an earthquake hits. The contrast between the two fields suggests that earthquake research is more likely to meet the end goal of resilience than is hurricane research, and thus that communities might be more resilient to hurricanes were the model by which research is funded and conducted to change. The earthquake research experience can provide lessons for this shift. This paper employs the Public Value Mapping (PVM) framework to explore these two divergent public value logics, their end results, and opportunities for improvement.  相似文献   
992.
Valdivia WD 《Minerva》2011,49(1):25-46
Evaluation studies of the Bayh-Dole Act are generally concerned with the pace of innovation or the transgressions to the independence of research. While these concerns are important, I propose here to expand the range of public values considered in assessing Bayh-Dole and formulating future reforms. To this end, I first examine the changes in the terms of the Bayh-Dole debate and the drift in its design. Neoliberal ideas have had a definitive influence on U.S. innovation policy for the last thirty years, including legislation to strengthen patent protection. Moreover, the neoliberal policy agenda is articulated and justified in the interest of “competitiveness.” Rhetorically, this agenda equates competitiveness with economic growth and this with the public interest. Against that backdrop, I use Public Value Failure criteria to show that values such as political equality, transparency, and fairness in the distribution of the benefits of innovation, are worth considering to counter the “policy drift” of Bayh-Dole.  相似文献   
993.
近年来,在收购或兼并后整合两个公司已变成一种高度复杂化的操作。尽管出现了“科学的”进步,高管们仍对自己收购艺术的能力深感沮丧。  相似文献   
994.
With reference to the recent science studies debate on the nature of science-industry relationship, this article focuses on a novel organizational form: the technological platform. Considering the field of micro- and nanotechnology in Switzerland, it investigates how technological platforms participate in framing science-industry activities. On the basis of a comparative analysis of three technological platforms, it shows that the platforms relate distinctly to academic and to industrial users. It distinguishes three pairs of user models, one model in each pair pertaining to how platforms act toward and conceive of academic users, the other model regarding users from industry. The article then discusses how technological platforms reconfigure the science-economy divide. While the observed platforms provide new institutional contact and interaction between academia and industry, new research collaboration does not necessarily materialize in practice. In this respect, science-industry mediation by way of technological platforms does not make science-industry boundaries more porous. Instead, the declared openness of public research with respect to industry, in the case of technological platforms, may contribute to maintain public science’s autonomy.  相似文献   
995.
996.
What happens when management consultants enter the academic arena and offer their services to universities? In the following article, we examine this question by drawing on findings from a qualitative study based on a series of 30 interviews with senior management consultants and academic managers in Germany. The aim of this explorative study is, first of all, to provide theoretically informed observations about the working mechanisms of management consulting in academia. A second, and related objective, is to contribute to the ongoing debate on the changing nature, role, and implications of managerial expertise and authority in higher education institutions. We begin our study by providing an overview of the literature on the changing nature of university management. Although these studies show a shift in the power constellation of universities from professional to managerial authority, we argue that they remain suspiciously vague as concerns the way academics and managers actually deal with this conflicting situation. By drawing on the insights of consulting studies, we then explore the stakes of consultancy in academic change projects and determine the analytical factors that will guide our qualitative analysis. Finally, we present and discuss the findings before concluding with more general remarks on the nature of academic management in German universities.  相似文献   
997.
In this paper we critically review recent developments in policies, practices and philosophies pertaining to the mediation between science and the public within the EU and the UK, focusing in particular on the current paradigm of Public Understanding of Science and Technology (PEST) which seeks to depart from the science information-transmission associated with previous paradigms, and enact a deliberative democracy model. We first outline the features of the current crisis in democracy and discuss deliberative democracy as a response to this crisis. We then map out and critically review the broad outlines of recent policy developments in public-science mediation in the EU and UK contexts, focusing on the shift towards the deliberative-democratic model. We conclude with some critical thoughts on the complex interrelationships between democracy, equality, science and informal pedagogies in public-science mediations. We argue that science and democracy operate within distinct value-spheres that are not necessarily consonant with each other. We also problematize the now common dismissal of information-transmission of science as inimical to democratic engagement, and argue for a reassessment of the role and importance of informal science learning for the “lay” public, provided within the framework of a deliberative democracy that is not reducible to consensus building or the mere expression of opinions rooted in social and cultural givens. This, we argue, can be delivered by a model of PEST that is creative and experimental, with both educational and democratic functions.  相似文献   
998.
This article aims to open up the biographical black box of three experts working in the boundary zone between science, policy and public debate. A biographical-narrative approach is used to analyse the roles played by the virologists Albert Osterhaus, Roel Coutinho and Jaap Goudsmit in policy and public debate. These figures were among the few leading virologists visibly active in the Netherlands during the revival of infectious diseases in the 1980s. Osterhaus and Coutinho in particular are still the key figures today, as demonstrated during the outbreak of novel influenza A (H1N1). This article studies the various political and communicative challenges and dilemmas encountered by these three virologists, and discusses the way in which, strategically or not, they handled those challenges and dilemmas during the various stages of the field’s recent history. Important in this respect is their pursuit of a public role that is both effective and credible. We will conclude with a reflection on the H1N1 pandemic, and the historical and biographical ties between emerging governance arrangements and the experts involved in the development of such arrangements.  相似文献   
999.
Charles Perrow used the term “normal accidents” to characterize a type of catastrophic failure that resulted when complex, tightly coupled production systems encountered a certain kind of anomalous event. These were events in which systems failures interacted with one another in a way that could not be anticipated, and could not be easily understood and corrected. Systems of the production of expert knowledge are increasingly becoming tightly coupled. Unlike classical science, which operated with a long time horizon, many current forms of expert knowledge are directed at immediate solutions to complex problems. These are prone to breakdowns like the kind discussed by Perrow. The example of the Homestake mine experiment shows that even in modern physics complex systems can produce knowledge failures that last for decades. The concept of knowledge risk is introduced, and used to characterize the risk of failure in such systems of knowledge production.  相似文献   
1000.
It is commonplace to say that the modern economy is knowledge based but a moment’s reflection points to the vacuity of this notion. For all economies are knowledge based and could not be otherwise. The question is rather how is one kind of knowledge based economy to be distinguished from another? This essay proposes that the answer may lie in three directions: (1) in terms of the variety of knowledge that is engaged; (2) in terms of the processes by which the production of knowledge is organised, and its corollary the resources devoted to knowledge production and dissemination; and, (3) in terms of the purposes to which knowledge is put. In respect of each of these dimensions, the rise of the modern university as a custodian of knowledge in Western economy and society has been of central importance; but universities are not alone in this role, a wide range of other agencies, private firms, public research laboratories for instance play an important role in defining a knowledge economy and have done so increasingly since the turn of the nineteenth century—a first indication of the systemic dimensions of a modern knowledge economy.  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