全文获取类型
收费全文 | 3200篇 |
免费 | 38篇 |
专业分类
教育 | 2371篇 |
科学研究 | 189篇 |
各国文化 | 39篇 |
体育 | 322篇 |
文化理论 | 38篇 |
信息传播 | 279篇 |
出版年
2023年 | 22篇 |
2022年 | 42篇 |
2021年 | 53篇 |
2020年 | 108篇 |
2019年 | 171篇 |
2018年 | 220篇 |
2017年 | 208篇 |
2016年 | 169篇 |
2015年 | 129篇 |
2014年 | 130篇 |
2013年 | 736篇 |
2012年 | 113篇 |
2011年 | 98篇 |
2010年 | 56篇 |
2009年 | 69篇 |
2008年 | 65篇 |
2007年 | 57篇 |
2006年 | 53篇 |
2005年 | 41篇 |
2004年 | 50篇 |
2003年 | 56篇 |
2002年 | 34篇 |
2001年 | 47篇 |
2000年 | 30篇 |
1999年 | 30篇 |
1998年 | 22篇 |
1997年 | 22篇 |
1996年 | 24篇 |
1995年 | 29篇 |
1994年 | 17篇 |
1993年 | 16篇 |
1992年 | 16篇 |
1991年 | 13篇 |
1990年 | 16篇 |
1989年 | 22篇 |
1988年 | 28篇 |
1987年 | 17篇 |
1986年 | 15篇 |
1985年 | 18篇 |
1984年 | 11篇 |
1982年 | 10篇 |
1981年 | 13篇 |
1980年 | 8篇 |
1979年 | 7篇 |
1978年 | 8篇 |
1977年 | 10篇 |
1976年 | 16篇 |
1974年 | 10篇 |
1972年 | 9篇 |
1970年 | 8篇 |
排序方式: 共有3238条查询结果,搜索用时 0 毫秒
121.
Amy M. Magnus Jenny S. West Daniel W. Scott Cheryl Maxson Jody Miller 《Journal of Criminal Justice Education》2019,30(2):223-249
This paper describes our efforts to systematically generate knowledge from ethnographic and other qualitative scholarship as a way of bridging intellectual gaps found in quantitative research. We ground this scholarly endeavor in the study of gangs, which has a lengthy history in the field of criminology, yet lacks a coherent, coordinated, and comparative understanding of gang dynamics, behavior, and impacts. We discuss the importance of acknowledging the multiple and mixed methodologies used in gang scholarship and detail the inductive, deductive, and iterative process that helped us (1) develop a comprehensive coding instrument for coding a range of qualitative works, (2) establish the instrument’s inter-rater reliability, and (3) remain cognizant and reflexive about the strengths of both quantitative and qualitative research. Finally, we share the critical yet informative challenges we faced throughout the project and conclude with reflections on why the project was unsuccessful in the way we originally envisioned. 相似文献
122.
Silva DA Benedetti TR Ferrari EP Meurer ST Antes DL Silva AM Santos DA Matias CN Sardinha LB Vieira F Petroski EL 《Journal of sports sciences》2012,30(5):479-484
The objective of this study was to describe the anthropometric profiles of elite older triathletes participating in the 2009 Ironman Brazil and to compare their somatotype, anthropometric and body composition characteristics with those of elite young triathletes and older non-athletes. The sample consisted of 64 males, divided into three groups: (1) older triathletes (n = 17), (2) young triathletes (n = 24), and (3) older non-athletes (n = 23). Somatotype was analysed according to the Carter and Heath ( 1990 ) method. Body mass index, sum of four skinfolds, percentage body fat, body fat mass, and fat-free mass were also estimated. Older non-athletes had higher endomorphy, sum of four skinfolds, fat percentage, and body fat mass than the athletes. Older athletes who participated in the Ironman and elite young triathletes had higher fat-free mass than older non-athletes. Older triathletes and older non-athletes were considered mainly endomorphic mesomorphs and young triathletes mainly ectomorphic mesomorphs. The findings that characterize the anthropometric profile of athletes in this sports modality could be used as a reference. 相似文献
124.
Diego Pastor María Campayo-Piernas Jesús Tadeo Pastor 《Journal of sports sciences》2019,37(12):1403-1410
Classification is a defining feature of Para-sport, and sports-specific classification systems determined through multidisciplinary scientific research are required, i.e., evidence-based and focused on the relationship between the impairment and the key performance determinants. Data envelopment analysis (DEA) was applied as a classification tool using a directional distance function (DDF) model. The aim of the study was to test the DEA as a possible classification tool in cerebral palsy football. We analyse the performance of 56 international para-footballers with hypertonia, ataxia or athetosis, who completed a 20-test battery with DEA models. Five of the tests are included in the model (change of direction: Illinois agility test; jumping: standing broad jump, four bounds for distance, and triple hop with the non-dominant leg; 10-m sprint/acceleration; and ball dribbling, both in a straight line and following a trajectory), showing that players with less impairment exhibit the highest efficiency. This outcome suggests that DEA models might be feasible for detecting and discriminating the performance and magnitude of impairment in cerebral palsy football, with an objective ranking of the athletes in relation to different physical performance tests. This study also provides reference scores for decision-making during classification and guidance for further research in team Paralympic sports. 相似文献
125.
Mapping the importance of the real world: The validity of connectivity analysis of patent citations networks 总被引:1,自引:0,他引:1
Recent empirical findings have questioned the use of patent citations as a measure. This points to the need of validation of patent citations methodologies, which we address by testing a recent methodology for studying technological evolution, namely connectivity analysis of citation networks. We find connectivity analysis to be a valid tool to identify the reliable knowledge which opens the way to further technological evolution of a surgical prosthesis, the artificial spinal disc. We also illustrate how connectivity analysis represents how this reliable knowledge differs depending on the stage of technological evolution. The corroborated validity of connectivity analysis of patent citations may trigger a renaissance in the use of this kind of patent data. 相似文献
126.
127.
128.
129.
Gerald R. Miller 《Communication Studies》2013,64(4):212-218
This essay identifies as knowledge objectives the need to (1) understand the interrelatedness of communicative contexts, (2) pinpoint more precisely the serial nature of communication, and (3) establish the relationship between laboratory and naturalist investigations 相似文献
130.
Renato Schibeci Judith MacCallum Wendy Cumming‐Potvin Cal Durrant Barry Kissane Erica‐Jane Miller 《Learning, Media and Technology》2008,33(4):313-327
Teachers have a central role in developing new learning models in schools. This paper describes a study that explored teachers’ confidence and competence in using Information and Communication Technologies (ICT) as they participated in an ICT development project conducted by an Australian education system in 12 primary schools. The project aimed to develop ICT integrated teaching practices by providing in‐class equipment and teacher professional development in ICT use, curriculum development and teaching strategies. The study used qualitative data from teacher records of Professional Development and Action Learning to identify three of four stages proposed to describe teachers’ ICT learning. Teachers moved from gaining basic ICT skills, to conducting ICT‐focused lessons and eventually appropriate ICT integration. Teachers who progressed to the third stage were able to exploit additional learning opportunities and begin to make fundamental changes to their pedagogy, but needed more time to reach the final stage of challenging existing pedagogical structures. 相似文献