全文获取类型
收费全文 | 329篇 |
免费 | 6篇 |
专业分类
教育 | 205篇 |
科学研究 | 24篇 |
体育 | 49篇 |
文化理论 | 12篇 |
信息传播 | 45篇 |
出版年
2023年 | 3篇 |
2022年 | 3篇 |
2021年 | 7篇 |
2020年 | 8篇 |
2019年 | 22篇 |
2018年 | 20篇 |
2017年 | 14篇 |
2016年 | 18篇 |
2015年 | 8篇 |
2014年 | 11篇 |
2013年 | 52篇 |
2012年 | 18篇 |
2011年 | 14篇 |
2010年 | 16篇 |
2009年 | 14篇 |
2008年 | 15篇 |
2007年 | 12篇 |
2006年 | 13篇 |
2005年 | 11篇 |
2004年 | 7篇 |
2003年 | 5篇 |
2002年 | 7篇 |
2001年 | 9篇 |
2000年 | 2篇 |
1999年 | 7篇 |
1998年 | 1篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1994年 | 1篇 |
1993年 | 5篇 |
1989年 | 1篇 |
1988年 | 2篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1976年 | 2篇 |
1972年 | 1篇 |
排序方式: 共有335条查询结果,搜索用时 15 毫秒
331.
Germany has a “dual system” of initial vocational education and training, one that other countries admire and would like to adopt. Can it hand this model over to them? This article argues that doing so will require far more than a simple process of copying. Instead, any transfer must reflect the existing conditions in the country adopting the system, and must be adapted to its unique social, cultural, and economic objectives. In addition, though the dual system can serve as a model, no other country can implement the dual system as a whole, or components one by one. Instead, it must use five constitutive elements in order to transfer the dual spirit of the German model appropriately. The article ends by describing some considerations that apply to the transfer process and reviews some German projects that transferred the system to countries in Asia. 相似文献
332.
This study presents in-depth empirical analyses of drop-outs from all Swiss universities for the entire student population between 1975 and 2008. The results show that most identifiable factors associated with a greater or lesser probability of dropping out are identical to those found in a recent Systematic Review (Larsen et al., 2013). The main findings are that: first, since the 1970s, there has been a marked trend towards falling drop-out rates which is largely due to female students who, today, have lower drop-out rates than their male counterparts; secondly, not only are there different drop-out rates for specific subjects of study, but there are also differences in baccalaureate profiles, which indicates that the skills acquired prior to entering university have a great impact on successful study; thirdly, students who change their first subject choice are at great risk of dropping out. No firm conclusions can yet be drawn about the Bologna reform but, based on the subjects which changed to the Bachelor/Master system between 2001 and 2003, no reduction in drop-out rates can be found as a result of the reform. 相似文献
333.
Thiemo Pelzer Boris Ullrich Stefan Endler Christian Rasche Mark Pfeiffer 《Journal of sports sciences》2018,36(16):1816-1826
In order to assess lower extremity muscle mechanical properties in athletes, power-load characteristics during multi-joint tasks are frequently examined. This work compared 6 weeks of traditional (TP) and daily-undulated (DUP) periodized loaded countermovement jumping (CMJ). 20 amateur athletes (age: 24.2 ± 2.6 years, height: 175.6 ± 7.1 cm, body mass: 71.5 ± 7.7 kg, 10 males/10 females) exercised three times weekly using maximal CMJs with loads corresponding to 0%, 15% and 30% of body mass. Prior to the training period, subjects were once-only assigned by random to either the TP or DUP training scheme. Pre-to-post training, maximal center of mass (COM) -height, -take-off velocity, -power output and -impulse were compared during CMJ with additional loads corresponding to 0–30% of body mass. ANOVA (time * group) with repeated measures revealed significant (P < 0.05) temporal gains of maximal COM-height (2–11%), -take-off velocity (1–7%), -power (2–8%) and -impulse (3–9%) over most loading conditions for TP and DUP. However, ANOVA indicated no group effects for any outcome. Independent from the periodization model, maximal power output remained statistically unchanged with increased testing loads. For short-term conditioning periods, TP and DUP were equally effective in enhancing biomechanical jumping variables under varying loading conditions. 相似文献
334.
This study aims to analyse the use of various forms of “knowledge utilisation” to integrate strategic customer knowledge in order to be one step ahead of the market and competitors. For this purpose, premises, processes, and factors are highlighted, which are essential to incorporate the knowledge of strategic customers into the knowledge base of knowledge-intensive small- to medium-sized enterprises (SME) and therefore contribute to the commercialisation of knowledge-intensive products as well as services. Here a knowledge marketing strategy may support the commercial exploitation of these products and services. Since research and literature in the field of knowledge marketing (especially in knowledge-intensive SMEs) is still scarce, the authors regard a qualitative research approach as appropriate. In the analysed cases, three necessary processes have been identified: (1) Developing knowledge networks, (2) solving customer problems, and (3) possessing the absorptive capacity to understand and integrate customer knowledge. 相似文献
335.
Previous research on the role of prior skills like proportional reasoning skills for the development of mathematical concepts offers conclusions such as “more (prior skills) is better (for later learning).” Insights, which prior skill level goes along with which level of learning outcomes, may advance the understanding of the development of mathematical concepts. An exploratory approach is presented based on level models to describe the relation between symbolic proportional reasoning skills and fraction outcomes beyond linearity. Analyses draw on samples of German fourth to sixth graders from a scaling (2017, N = 325, 54.8% female) and longitudinal study (2018/2019, N = 436, 42.7% female). Particularly mastering natural and internal rational ratios in proportional reasoning seems relevant for successful fraction learning. 相似文献