全文获取类型
收费全文 | 1645篇 |
免费 | 16篇 |
专业分类
教育 | 1357篇 |
科学研究 | 28篇 |
各国文化 | 27篇 |
体育 | 94篇 |
综合类 | 1篇 |
文化理论 | 4篇 |
信息传播 | 150篇 |
出版年
2023年 | 3篇 |
2022年 | 10篇 |
2021年 | 15篇 |
2020年 | 36篇 |
2019年 | 70篇 |
2018年 | 83篇 |
2017年 | 83篇 |
2016年 | 76篇 |
2015年 | 39篇 |
2014年 | 68篇 |
2013年 | 369篇 |
2012年 | 46篇 |
2011年 | 55篇 |
2010年 | 53篇 |
2009年 | 57篇 |
2008年 | 51篇 |
2007年 | 52篇 |
2006年 | 48篇 |
2005年 | 40篇 |
2004年 | 31篇 |
2003年 | 39篇 |
2002年 | 35篇 |
2001年 | 18篇 |
2000年 | 24篇 |
1999年 | 20篇 |
1998年 | 17篇 |
1997年 | 23篇 |
1996年 | 14篇 |
1995年 | 15篇 |
1994年 | 19篇 |
1993年 | 7篇 |
1992年 | 9篇 |
1991年 | 10篇 |
1990年 | 16篇 |
1989年 | 12篇 |
1988年 | 9篇 |
1987年 | 8篇 |
1986年 | 6篇 |
1985年 | 6篇 |
1984年 | 4篇 |
1983年 | 9篇 |
1982年 | 7篇 |
1981年 | 6篇 |
1980年 | 7篇 |
1979年 | 6篇 |
1978年 | 5篇 |
1976年 | 4篇 |
1973年 | 3篇 |
1971年 | 4篇 |
1967年 | 2篇 |
排序方式: 共有1661条查询结果,搜索用时 15 毫秒
101.
Christine Greenhalgh 《Research Policy》2006,35(4):562-580
This paper analyses market valuations of UK companies using a new data set of their R&D and IP activities (1989-2002). In contrast to previous studies, the analysis is conducted at the sectoral-level, where the sectors are based on the technological classification originating from Pavitt [Pavitt, K., 1984. Sectoral patterns of technical change. Research Policy 13, 343-373]. The first main result is that the valuation of R&D varies substantially across these sectors. Another important result is that, on average, firms that receive only UK patents tend to have no significant market premium. In direct contrast, patenting through the European Patent Office does raise market value, as does the registration of trade marks in the UK for most sectors. To explore these variations the paper links competitive conditions with the market valuation of innovation. Using profit persistence as a measure of competitive pressure, we find that the sectors that are the most competitive have the lowest market valuation of R&D. Furthermore, within the most competitive sector (‘science based’ manufacturing), firms with larger market shares (an inverse indicator of competitive pressure) also have higher R&D valuations, as well as some positive return to UK patents. We conclude that this evidence supports Schumpeter by finding higher returns to innovation in less than fully competitive markets and contradicts Arrow [Arrow, K., 1962. Economic welfare and the allocation of resources for invention. In: Nelson, R. (Ed.), The Rate and Direction of Inventive Activity. Princeton University Press, Princeton], who argued that, with the existence of IP rights, competitive market structure provides higher incentives to innovate. 相似文献
102.
Based on theoretically driven models, the Chicago School Readiness Project (CSRP) targeted low-income children's school readiness through the mediating mechanism of self-regulation. The CSRP is a multicomponent, cluster-randomized efficacy trial implemented in 35 Head Start-funded classrooms (N = 602 children). The analyses confirm that the CSRP improved low-income children's self-regulation skills (as indexed by attention/impulse control and executive function) from fall to spring of the Head Start year. Analyses also suggest significant benefits of CSRP for children's preacademic skills, as measured by vocabulary, letter-naming, and math skills. Partial support was found for improvement in children's self-regulation as a hypothesized mediator for children's gains in academic readiness. Implications for programs and policies that support young children's behavioral health and academic success are discussed. 相似文献
103.
Windsor J Benigno JP Wing CA Carroll PJ Koga SF Nelson CA Fox NA Zeanah CH 《Child development》2011,82(4):1040-1046
This report examines 174 young children's language outcomes in the Bucharest Early Intervention Project, the first randomized trial of foster placement after institutional care. Age of foster placement was highly correlated with language outcomes. Placement by 15 months led to similar expressive and receptive language test scores as typical age peers at 30 and 42 months. Placement from 15 to 24 months also led to dramatic language improvement. In contrast, children placed after 24 months had the same severe language delays as children in institutional care. Language samples at 42 months confirmed that placement after 24 months led to lower expressive skill. 相似文献
104.
105.
Jochen van der Burgt Junmin Li Christine Wilbertz Prof. Dr. Matthias Pilz 《Zeitschrift für Erziehungswissenschaft》2014,17(1):135-158
For many years the possible introduction of the German dual vocational education programme into other countries has been discussed. The transferability of the German vocational education and training system into other countries has been controversially discussed in the work of development assistance and in international comparative vocational education research for a long time, even though the empirical basis is quite narrow. The present study focuses on the vocational and training behaviours of German corporations in their subsidiaries in Japan, China and India. Even though all three nations are important countries for the German corporations the culture, the vocational education and employment systems are very different. Based upon the theory of the EPRG model in international management, this study analyses the vocational education and training activities and in terms of the EPRG model by interviews with experts. The findings indicate that a polycentric approach is used exclusively in India and to a significant extent in China. In Japan, in addition to the prevalent polycentric approach, there is also a strong influence of geocentric training styles. The similarities can be partly explained by the stronger focus on theoretical training institutions and a more academic attitude in society as a whole, which means that purely vocational training plays a marginal role with low esteem. In this context, it would be difficult to implement the German style of vocational education and training. 相似文献
106.
107.
108.
Christine Nash Russell Martindale Dave Collins Amanda Martindale 《Journal of sports sciences》2013,31(10):985-994
Abstract Research into expertise is increasing across a number of domains pertinent to sport. Whilst this increase is particularly apparent in coaching, a key question is how to identify an expert coach? Accordingly, this paper draws upon existing studies into expert coaches to address this issue; in particular, the criteria used to select expert coaches for research purposes and the methods used in expert coach research. Based on these data, we contend that the elements of expertise are not fully reflected within currently accepted criteria which, in turn, results in expert coaching research not necessarily identifying the appropriate individuals to study. The paper concludes with recommendations for more rigorous criteria for selecting expert coaches and highlights the associated implications for the future training and development of expert coaches. 相似文献
109.
This paper reports the experiences of 150 children and six primary teachers when active learning pedagogies were introduced into the first year of primary schools. Although active learning increased the amount of talk between children, those from socio‐economically advantaged homes talked more than those from less advantaged homes. Also, individual children experienced very little time engaged in high‐quality talk with the teacher, despite the teachers spending over one‐third of their time responding to children's needs and interests. Contextual differences, such as the different staffing ratios in schools and pre‐schools, may affect how well the benefits of active learning transfer from pre‐school contexts into primary schools. Policy‐makers and teachers should pay particular attention to the implications of this for the education of children from economically less advantaged home backgrounds. 相似文献
110.
Averil Coxhead Emma McLaughlin Aleeshea Reid 《Journal of Vocational Education & Training》2019,71(2):175-200
Learners in the trades are faced with learning a large amount of technical vocabulary along with the content of their field, but they do not tend to encounter this language outside their courses of study. This technical vocabulary is a core element in their developing knowledge of their trade and their learner identity. This article focuses first on identifying technical vocabulary in Fabrication using specialised written and spoken corpora, and through extensive checking with experts in the field as well as reference sources. A technical word list of 1079 types was developed, along with a list of common abbreviations and their meanings and a list of proper nouns. The technical word list covers over 30% of the vocabulary in the written Fabrication corpus and just over 9% of the spoken Fabrication corpus. The second part of the article discusses this vocabulary in light of the concept of vocational thresholds and provides suggestions for incorporating the word list into pedagogy, including an apprenticeship approach in which a focus on literacy/literacy acquisition is embedded into content teaching. Suggestions for future research are also included. 相似文献