全文获取类型
收费全文 | 3205篇 |
免费 | 44篇 |
国内免费 | 9篇 |
专业分类
教育 | 2279篇 |
科学研究 | 282篇 |
各国文化 | 54篇 |
体育 | 237篇 |
综合类 | 2篇 |
文化理论 | 25篇 |
信息传播 | 379篇 |
出版年
2023年 | 13篇 |
2022年 | 28篇 |
2021年 | 56篇 |
2020年 | 108篇 |
2019年 | 137篇 |
2018年 | 165篇 |
2017年 | 162篇 |
2016年 | 152篇 |
2015年 | 108篇 |
2014年 | 139篇 |
2013年 | 788篇 |
2012年 | 114篇 |
2011年 | 99篇 |
2010年 | 105篇 |
2009年 | 95篇 |
2008年 | 96篇 |
2007年 | 89篇 |
2006年 | 81篇 |
2005年 | 43篇 |
2004年 | 45篇 |
2003年 | 61篇 |
2002年 | 45篇 |
2001年 | 45篇 |
2000年 | 34篇 |
1999年 | 26篇 |
1998年 | 23篇 |
1997年 | 24篇 |
1996年 | 18篇 |
1995年 | 25篇 |
1994年 | 13篇 |
1993年 | 26篇 |
1992年 | 21篇 |
1991年 | 21篇 |
1990年 | 10篇 |
1989年 | 20篇 |
1988年 | 9篇 |
1987年 | 19篇 |
1986年 | 8篇 |
1985年 | 23篇 |
1984年 | 15篇 |
1983年 | 13篇 |
1982年 | 15篇 |
1981年 | 17篇 |
1980年 | 11篇 |
1979年 | 15篇 |
1978年 | 11篇 |
1977年 | 7篇 |
1976年 | 7篇 |
1975年 | 6篇 |
1973年 | 5篇 |
排序方式: 共有3258条查询结果,搜索用时 31 毫秒
1.
Jin Woo Lee Anastasia Ostrowski Aileen Huang-Saad Colleen M. Seifert 《European Journal of Engineering Education》2019,44(3):360-378
ABSTRACTWith increasing demand for improved medical equipment and healthcare, next-generation biomedical engineers need strong design skills. Equipping biomedical engineering students with tools for idea generation and development can increase student design success. Design Heuristics are an ideation tool developed through empirical studies of product designs. While identified in the mechanical engineering space, Design Heuristics may be applicable in biomedical engineering design. In our study, we implemented a Design Heuristics session during upper-level undergraduate and first-year graduate biomedical engineering design courses. We examined the applicability of Design Heuristics within individual and team concept generation contexts. The findings demonstrated that biomedical engineering students were able to use Design Heuristics to generate multiple concepts, and that initial concepts produced using Design Heuristics were carried over into final team design. The results support the applicability of Design Heuristics to student idea generation in biomedical engineering design. 相似文献
2.
AbstractThe vast majority of social scientific studies of sport have been secular in nature and/or have tended to ignore the importance of studying the religious aspects of sport. In light of this, a recent study has sought to encourage sociologists of sport not to divorce the ‘religious’ and the ‘sacred’ from their studies. In response to this call, the goal of the current essay is to explore how the conception of Christianity as ‘public religion’ can be utilized to help justify the use of a Christian sociological approach for studying the social scientific aspects of sport. After making a case for Christianity as public religion, we conclude that many of the sociological issues inherent in modern sport are an indirect result of its increasing secularization and argue that this justifies the need for a Christian sociological approach. We encourage researchers to use the Bible, the tools of Christian theology and sociological concepts together, so to inform analyses of modern sport from a Christian perspective. 相似文献
3.
Derwin K. C. Chan Alfred Sing Yeung Lee Duncan J. Macfarlane Martin S. Hagger Kyra Hamilton 《Journal of sports sciences》2020,38(14):1666-1673
ABSTRACT Two studies were employed to test the reliability and validity of the Swimming Competence Questionnaire (SCQ) among primary school children. Study 1 was a cross-sectional survey in 4959 primary school children. Study 2 was a pre-post-test quasi-experiment among 1609 primary school children who underwent a 20-lesson learn-to-swim programme. In Study 1, exploratory structural equation modelling revealed excellent goodness-of-fit and scale reliability for a two-factor model comprising distance and skill factors, which supported the construct and convergent validity. SCQ scores were significantly and positively correlated with swimming outcomes (i.e., self-efficacy, intention, swimming frequency), which supported SCQ’s concurrent and criterion validity. Average variance extracted for the SCQ factors exceeded cut-off criteria supporting discriminant validity. In Study 2, pre-test SCQ scores correlated significantly and positively with the SCQ scores, self-efficacy, intention, and swimming frequency at post-test, which supported SCQ’s test-retest reliability and predictive validity. Positive intraclass correlation between SCQ scores and coach ratings at post-test provided evidence for SCQ’s inter-rater reliability. SCQ scores significantly improved at post-test, which supported SCQ’s ecological validity. In conclusion, findings indicate that the SCQ is a valid and reliable measure to assess primary school children’s swimming competence, in terms of swimming distance and basic water survival skills. 相似文献
4.
5.
Recent advances in droplet microfluidics have led to the fabrication of versatile vesicles with a structure that mimics the cellular membrane. These artificial cell-like vesicles including polymersomes and liposomes effectively enclose an aqueous core with well-defined size and composition from the surrounding environment to implement various biological reactions, serving as a diverse functional reactor. The advantage of realizing various biological phenomena within a compartment separated by a membrane that resembles a natural cell membrane is actively explored in the fields of synthetic biology as well as biomedical applications including drug delivery, biosensors, and bioreactors, to name a few. In this Perspective, we first summarize various methods utilized in producing these polymersomes and liposomes. Moreover, we will highlight some of the recent advances in the design of these artificial cell-like vesicles for functional bioreactors and discuss the current issues and future perspectives. 相似文献
6.
Annis Lee Adams 《Public Services Quarterly》2020,16(3):172-178
AbstractBecause of the global COVID-19 pandemic during the spring of 2020, colleges and universities found themselves rapidly moving all courses to online modalities, a format that many instructors were not experienced in or comfortable with. Academic librarians were called upon to help support faculty in this sudden transition, as well as migrating their own library services and instruction online. For many, it felt like a mad scramble to find best practices for online teaching, or even just “good-enough” practices, as well as specific tools that instructional faculty and librarians could utilize to keep their students engaged and learning during such a trying time. At the time of this writing, some universities have announced that they will continue to hold most, if not all, courses online in the fall 2020 term. Resources to support online teaching are critical now, and they will continue to be important going forward even after the global pandemic subsides. The reviews in this column cover a variety of online instructional tools and instructional support sites. The resources reviewed range from providing best practices for online pedagogy, creating engaging formative assessment tools, developing video discussion boards, creating interactive images, using virtual bulletin boards for student collaboration, and ensuring online content meets accessibility requirements. These resources will be useful for librarians and instructional faculty as they continue to teach in the online environment. 相似文献
7.
Danielle A. Pester A. Stephen Lenz Joshua C. Watson 《Counselor Education & Supervision》2020,59(2):112-128
As counselor preparation programs are compelled to demonstrate student social and cultural competence, valid inventories are needed to measure development consistent with contemporary standards. The Intersectional Privilege Screening Inventory was created for this purpose, was assessed using 4 types of validity evidence, and has results supporting its use in student development. 相似文献
8.
9.
ABSTRACT Research on media substitution theory has examined substitutional and/or complementary relationships between new and existing media. This study focuses on the growth of mobile platforms and investigates the relationship between mobile devices and personal computers. Using Nielsen’s panel data that provide electronically recorded media usage (N = 2,396), this study analyzes yearly changes in time allocation to mobile devices and PCs at total and content-specific usage levels during mobile 4G transition. Results suggest a complementarity dynamic between mobile devices and PCs; however, the patterns were more nuanced in light of the role of individual and structural factors when determining media choice. 相似文献
10.