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   2393篇
  免费   41篇
  国内免费   1篇
教育   1416篇
科学研究   242篇
各国文化   53篇
体育   270篇
综合类   1篇
文化理论   14篇
信息传播   439篇
  2024年   4篇
  2023年   9篇
  2022年   16篇
  2021年   35篇
  2020年   59篇
  2019年   116篇
  2018年   125篇
  2017年   133篇
  2016年   96篇
  2015年   67篇
  2014年   96篇
  2013年   476篇
  2012年   110篇
  2011年   151篇
  2010年   80篇
  2009年   81篇
  2008年   78篇
  2007年   71篇
  2006年   77篇
  2005年   53篇
  2004年   50篇
  2003年   44篇
  2002年   37篇
  2001年   31篇
  2000年   23篇
  1999年   23篇
  1998年   34篇
  1997年   19篇
  1996年   13篇
  1995年   19篇
  1994年   17篇
  1993年   18篇
  1992年   13篇
  1991年   11篇
  1990年   19篇
  1989年   18篇
  1988年   5篇
  1987年   8篇
  1986年   4篇
  1985年   5篇
  1984年   9篇
  1983年   11篇
  1982年   4篇
  1981年   7篇
  1980年   8篇
  1977年   5篇
  1974年   5篇
  1968年   3篇
  1948年   3篇
  1852年   3篇
排序方式: 共有2435条查询结果,搜索用时 15 毫秒
161.
In the past few decades, the additional revenues available via higher education exports (through both relatively higher prices and increased enrolments) have attracted the attention of providers in many developed countries, not least in Anglophone countries like the USA, the UK, Canada and Australia. However, while the revenue case is strong, the institutional cost structures underlying the provision of higher education services for international students remain relatively unknown at the sector level. Accordingly, we offer a comprehensive analysis of the cost economies underlying higher education provision for international students using a sample of 37 Australian public universities over the period from 2003 to 2012. The findings suggest that it is appealing to enrol additional overseas students given their lower average and marginal costs and the significant economies of scale prevailing in higher education generally. Further, while we find evidence of economies of scope for overseas students only in smaller institutions, there is no evidence of diseconomies of scope, implying the current number of overseas students and their joint production with domestic students at the least does not lead to unnecessarily higher overall costs.  相似文献   
162.
The Franklin Institute, Philadelphia, Pennsylvania, awarded the 2001 Benjamin Franklin Medal in Earth Science to Rob Van der Voo for his outstanding contributions to the field of paleomagnetism and his reconstruction of ancient continental positions that have lead to a better understanding of plate tectonic processes for the past billion years of Earth history.  相似文献   
163.
164.
To examine the development of religious identity during the teenage years, adolescents (N = 477) from Latin American, Asian, and European backgrounds completed questionnaires in the 10th, 11th, and 12th grades (10th grade age: M = 15.81, SD = 0.36). Results indicated that religious identity remained stable across high school whereas religious participation declined. Even after controlling for ethnic differences in religious affiliation, socioeconomic background, and generational status, adolescents from Latin American and Asian backgrounds reported higher levels of religious identity and adolescents from Latin American backgrounds reported higher rates of religious participation. Within individual adolescents, changes in religious identity were associated with changes in ethnic and family identities, suggesting important linkages in the development of these social identities during adolescence.  相似文献   
165.
This paper presents findings from a comparative analysis of three similar secondary geometry texts, one critical unit, one standards-based reform unit, and one specialist chapter. I developed the critical unit as I took the tenets of critical mathematics (CM) and substantiated them in printed curricular materials in which to teach as part of a larger study. The reform and specialist texts were both sections from commercially available textbooks. The primary goal of the textual analysis was to examine how the incorporation of critical or political themes into the required secondary mathematics curriculum transformed this curriculum. Key findings were that the CM text exchanged political for mathematical content and sent class-based messages about students’ academic potential. I conclude by arguing that the CM agenda proposed by advocates in the USA is problematic in terms of promoting equity in mathematics education.  相似文献   
166.
This paper investigates the relationship between non-parental care and toddlers’ behavioral outcomes using data from Australia. In particular, we explore heterogeneity in the relationship using the unique data on quality attributes: carer/child ratio, share of qualified staff, and expert ratings. The results suggest that full-time non-parental care, particularly center care, is negatively associated with toddlers’ behavioral outcomes. The negative association is however mitigated when centers have a larger number of carers per child. The negative association between non-parental care and behavioral outcomes also appears to be larger for children with better-educated parents.  相似文献   
167.
This article examines talks given by 12 female media professionals at a Southern US university’s center on women in communication between 2013 and 2015 to identify the influence of hegemonic masculinity in industry speak about women and professionalism in the fields of journalism, advertising, and public relations. This paper applies a feminist critique of discussions about “work–life balance,” “leaning in,” “emotion,” and language about the role of technology and innovation in women’s careers, to argue that inherent in these discussions about media professionalism are traits that perpetuate binary notions of feminine–masculine traits of the workplace. As a whole, these messages fail to account for notions of intersectionality and perpetuate inequality and masculine power for future professionals.  相似文献   
168.
The requirement for An electrical grid-connected wind turbine is that the synchronous generator speed is stable within a required speed range for the electrical grid. In this paper, a hydraulic wind turbine (HWT) system is considered, and the working principle and working conditions of the HWT are introduced. A novel speed control method is proposed in this paper, using both a proportional flow control valve and a variable displacement motor, which are adjusted in combination to control the speed of the HWT. By establishing a state space model of the HWT and solving the nonlinear system with a feedback linearization method, a bivariate tracking controller is constructed to realize accurate speed control under fluctuating wind speed and the load disturbance conditions. The effectiveness of the control method is verified by simulation, but experimental results highlight problems with the method. The theoretical controller is simplified to reduce sensitivity to measurement noise and modeling error. The control effect has been improved to some extent, but it is limited. Based on these results, combined with the sliding mode variable structure control method and the feedback linearization method to solve the problem of measurement noise and modeling error, and the effectiveness of the control law is finally verified experimentally. It lays a theoretical foundation for the practical application of HWT.  相似文献   
169.
In this paper, we examine the challenges faced by faith-based institutions in a low-income, predominantly Black community seeking to take advantage of grants provided through the White House Office of Community and Faith-Based Initiatives (FBCI). FBCI is an e-Government program that assists nonprofit organizations in competing for Federal dollars with fewer bureaucratic barriers. Informed by the design-actuality framework, we interviewed clergy at seven faith-based organizations. The intent of this analysis is to juxtapose the design intentions of the government officials with the actualities expressed by the intended benefactors of the initiative. Our findings suggest that this e-Government initiative may unwittingly exacerbate existing disparities in the strategic use of information and communication technologies (ICT).  相似文献   
170.
This research has as its objective the discovery of the critical factors that enable citizens to adopt e-Government (e-Gov) at different stages of service maturity. To accomplish the objective, this research has explained the related concepts and theories and developed a research framework grounded on a strong theoretical and literature review background. The empirical study was conducted in Canada, which is a leader in providing mature e-Gov services. From our results, we have observed two ontological differences from the present literature in the adoption behavior of e-Gov where organizational and financial perspectives have distinct implications over parsimonious technology adoption behavior. First, technology adoption model (TAM), diffusion of innovation theory (DOI), and theory of planned behavior (TPB) cannot capture and specify the complete essence of e-Gov adoption behavior of citizens. Second, e-Gov adoption behavior also differs based on service maturity levels, i.e., when functional characteristics of organizational, technological, economical, and social perspectives of e-Gov differ. Our findings indicate the critical factors that enable citizens to adopt e-Gov at different stages of service maturity. Public administrators and policy-makers have potential implications from the findings of the adoption behavior of e-Gov at different maturity levels.  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