全文获取类型
收费全文 | 12685篇 |
免费 | 28篇 |
专业分类
教育 | 9826篇 |
科学研究 | 1228篇 |
各国文化 | 28篇 |
体育 | 383篇 |
文化理论 | 385篇 |
信息传播 | 863篇 |
出版年
2022年 | 9篇 |
2021年 | 10篇 |
2020年 | 14篇 |
2019年 | 28篇 |
2018年 | 2200篇 |
2017年 | 2109篇 |
2016年 | 1601篇 |
2015年 | 137篇 |
2014年 | 144篇 |
2013年 | 382篇 |
2012年 | 247篇 |
2011年 | 728篇 |
2010年 | 853篇 |
2009年 | 451篇 |
2008年 | 679篇 |
2007年 | 1173篇 |
2006年 | 97篇 |
2005年 | 418篇 |
2004年 | 470篇 |
2003年 | 376篇 |
2002年 | 156篇 |
2001年 | 23篇 |
2000年 | 34篇 |
1999年 | 17篇 |
1998年 | 13篇 |
1997年 | 27篇 |
1996年 | 34篇 |
1995年 | 16篇 |
1994年 | 23篇 |
1993年 | 25篇 |
1992年 | 18篇 |
1991年 | 22篇 |
1990年 | 20篇 |
1989年 | 12篇 |
1988年 | 11篇 |
1987年 | 6篇 |
1986年 | 9篇 |
1985年 | 12篇 |
1984年 | 13篇 |
1983年 | 10篇 |
1982年 | 12篇 |
1981年 | 8篇 |
1980年 | 11篇 |
1979年 | 9篇 |
1978年 | 7篇 |
1977年 | 12篇 |
1976年 | 3篇 |
1970年 | 2篇 |
1969年 | 2篇 |
1967年 | 4篇 |
排序方式: 共有10000条查询结果,搜索用时 10 毫秒
161.
162.
163.
The objective of this study was to examine current teacher and mental health professional ratings regarding the relative seriousness of 50 specific children's behavior problems and to compare the results to those found by Wickman (1928). Wickman's questionnaire and procedures were replicated to insure comparability. A second objective was to extend Wickman's work so that children's ratings of their own behavior problems may be ascertained. An increase in the similarity between teachers' and mental health professionals' judgements concerning the seriousness of specific children's behavior problems was found. These findings were attributable to a more pragmatic approach taken by mental health professionals. A very high agreement on the seriousness of specific behavior problem ratings was demonstrated by children and teachers. This similarity may be the result of proximity of effects. 相似文献
164.
165.
Funding agencies in Canada are attempting to break down the organizational boundaries between disciplines to promote interdisciplinary
research and foster the integration of the social sciences into the health research field. This paper explores the extent
to which biomedical and clinician scientists’ perceptions of social science research operate as a cultural boundary to the
inclusion of social scientists into this field. Results indicated that cultural boundaries may impede social scientists’ entry
into the health research field through three modalities: (1) biomedical and clinician scientists’ unfavourable and ambivalent
posture towards social science research; (2) their opposition to a resource increase for the social sciences; and (3) clinician
scientists procedural assessment criteria for social science. The paper also discusses the merits and limitations of Tom Gieryn’s
concept of boundary-work for studying social dynamics within the field of science.
相似文献
Brian D. HodgesEmail: |
166.
Rethinking Polanyi’s Concept of Tacit Knowledge: From Personal Knowing to Imagined Institutions 总被引:1,自引:0,他引:1
Half a century after Michael Polanyi conceptualised ‘the tacit component’ in personal knowing, management studies has reinvented
‘tacit knowledge’—albeit in ways that squander the advantages of Polanyi’s insights and ignore his faith in ‘spiritual reality’.
While tacit knowing challenged the absurdities of sheer objectivity, expressed in a ‘perfect language’, it fused rational knowing, based on personal experience, with mystical speculation about an un-experienced ‘external reality’. Faith alone saved Polanyi’s model from solipsism. But Ernst von Glasersfeld’s
radical constructivism provides scope to rethink personal tacit knowing with regard to ‘other people’ and the intersubjectively
viable construction of ‘experiential reality’. By separating tacit knowing from Polanyi’s metaphysical realism and drawing
on Benedict Anderson’s concept of ‘imagined communities’, it is possible to conceptualise ‘imagined institutions’ as the tacit
dimension of power that shapes human interaction. Whereas Douglass North claimed institutions could be reduced to rules, imagined
institutions are known in ways we cannot tell. 相似文献
167.
This article investigates the effect of a Tony nomination or win on the demand facing a Broadway production using a panel
of weekly revenues for Broadway productions from 1996 to 2007. Our results indicate that the effect of a nomination or win
is positive in the week of the announcement and gradually increases in successive weeks, presumably due to publicity and word-of-mouth.
Winners experience an increase in demand as late as 1 year later when awards are publicized for the following season. Moreover,
nominees that do not win the award are penalized heavily in the weeks following the Award announcements. We find that winning
a Tony Award increases a production’s revenues by 12% in the week immediately following the Awards.
相似文献
Lesley ChiouEmail: |
168.
Jordi McKenzie 《Journal of Cultural Economics》2009,33(4):279-299
This study considers a frailty duration approach to modelling the life-length of a sample of 360 films that went into wide
release at the Australian box office from 1 January 2000 to 31 December 2005. The analysis extends previous research by
considering a range of film-specific covariates relating to distribution, production, consumer signals, and weekly performance.
In particular, it is shown that film success (defined in a duration context) responds to previewing, advertising, critical
reviews, and US box office—but not to production budget, star power or opening-week screens. The study also reveals that it
is appropriate to account for unobservable heterogeneity between films in the choice of empirical methodology. 相似文献
169.
Nathaniel Logar 《Minerva》2009,47(4):345-366
How does the research performed by a government mission agency contribute to useable technologies for its constituents? Is it possible to incorporate science policy mechanisms for increasing benefits to users in the decision process? The United States National Institute of Standards &; Technology (NIST) promises research directed towards industrial application. This paper considers the processes that produce science and technology at NIST. The institute’s policies for science provide robust examples for how effective science policies can contribute to the emergence of useful technologies. To progress towards technologies that can be years away, the agency uses several means for integrating the needs of eventual information users into the prioritization process. To accomplish this, NIST units, such as the Materials Science and Engineering Laboratory, incorporate mechanisms for considering user need and project impact into different stages of its scientific decision processes. This, and other specific strategies that the agency utilizes for connecting the supply of science to information demand, provide lessons for generating useable science. 相似文献
170.
Probability density function (PDF) method is proposed for analysing the structure of the reconstructed attractor in computing the correlation dimensions of RR intervals of ten normal old men. PDF contains important information about the spatial distribution of the phase points in the reconstructed attractor. To the best of our knowledge, it is the first time that the PDF method is put forward for the analysis of the reconstructed attractor structure. Numerical simulations demonstrate that the cardiac systems of healthy old men are about 6 - 6.5 dimensional complex dynamical systems. It is found that PDF is not symmetrically distributed when time delay is small, while PDF satisfies Gaussian distribution when time delay is big enough. A cluster effect mechanism is presented to explain this phenomenon. By studying the shape of PDFs, that the roles played by time delay are more important than embedding dimension in the reconstruction is clearly indicated. Results have demonstrated that the PDF method represents a promising numerical approach for the observation of the reconstructed attractor structure and may provide more information and new diagnostic potential of the analyzed cardiac system. 相似文献