全文获取类型
收费全文 | 12711篇 |
免费 | 131篇 |
国内免费 | 12篇 |
专业分类
教育 | 8248篇 |
科学研究 | 2261篇 |
各国文化 | 117篇 |
体育 | 867篇 |
综合类 | 9篇 |
文化理论 | 86篇 |
信息传播 | 1266篇 |
出版年
2021年 | 134篇 |
2020年 | 188篇 |
2019年 | 300篇 |
2018年 | 380篇 |
2017年 | 367篇 |
2016年 | 298篇 |
2015年 | 224篇 |
2014年 | 291篇 |
2013年 | 2273篇 |
2012年 | 296篇 |
2011年 | 290篇 |
2010年 | 238篇 |
2009年 | 230篇 |
2008年 | 210篇 |
2007年 | 224篇 |
2006年 | 190篇 |
2005年 | 162篇 |
2004年 | 161篇 |
2003年 | 161篇 |
2002年 | 149篇 |
2001年 | 181篇 |
2000年 | 188篇 |
1999年 | 167篇 |
1998年 | 90篇 |
1997年 | 95篇 |
1996年 | 115篇 |
1995年 | 85篇 |
1994年 | 98篇 |
1993年 | 94篇 |
1992年 | 136篇 |
1991年 | 146篇 |
1990年 | 146篇 |
1989年 | 165篇 |
1988年 | 120篇 |
1987年 | 118篇 |
1986年 | 159篇 |
1985年 | 157篇 |
1984年 | 130篇 |
1983年 | 129篇 |
1982年 | 114篇 |
1981年 | 93篇 |
1980年 | 105篇 |
1979年 | 138篇 |
1978年 | 120篇 |
1977年 | 105篇 |
1976年 | 101篇 |
1974年 | 111篇 |
1973年 | 92篇 |
1972年 | 84篇 |
1971年 | 108篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
91.
This study explored the factors affecting repeat theatrical viewing of movies. Integrating content, social influence, and access/competition variables, the analysis reveals that the drivers of theatrical repeat viewing are different from those for box office performance. For example, the effects of genre, transmedia content, and audience review were significant only for the latter and factors such as movie length, critics’ review, and level of news coverage actually played a negative role in the repeat consumption. 相似文献
92.
In this article, we build on Stigler and Becker’s (1977) “consumption capital theory” and propose a novel conceptualization of film quality for the analysis of motion picture franchises. Generally, this theory predicts that the utility consumers derive from a particular good or service increases with prior consumption. We test our theoretical conjectures by drawing on the population of sequels that were running in the US between 1992 and 2011. The empirical results point to the explanatory power of the proposed framework. Film executives may use our findings to improve the profitability of their sequel productions. From a theoretical point of view, consumption capital theory allows for a more refined analysis of sequel performance along different dimensions. Moreover, it may provide a fruitful basis for the analysis of other serial media content, including books, TV, music, and games. 相似文献
93.
This study employed the uses and gratification approach to investigate how journalists perceive relational satisfaction with the public on Twitter, specifically the associations between journalists’ motivations to use Twitter, their Twitter use, and their relational satisfaction with the public. Through a survey of South Korean journalists, this study revealed that journalists’ motivations for Twitter use are positively related to their job-related activities on Twitter (e.g., posting/sharing their news and interacting with audience), which consequently influences perceived relational satisfaction with the public. The findings provide new insight into an increasingly important part of the public’s engagement and news/information flows in the digital media environment. This study expands upon the literature by analyzing how journalists’ motivations for using Twitter and their job-related activities on Twitter are associated with relational satisfaction with the public. 相似文献
94.
Rapid advances in technology have provided the potential to connect citizens to their surroundings in unprecedented ways. While many scholars examine different types of efficacy as a predictor of behavior (e.g., internal, external, and political), it is essential to examine how confident citizens feel in their ability to use the technology before understanding how they will use it politically. Research shows that perceived competence increases motivation, which is correlated with behavior. This study examined how traditional measures of efficacy and a new measure affect online political behaviors, concluding that technological efficacy is a reliable construct predicting online news use and expression. 相似文献
95.
This study investigated relationships between social media motivation, relative preferences for social media type, and network heterogeneity, using a U.S. national survey. By classifying social media into the symmetrical and the asymmetrical, we showed that relationship motivation was more likely to be associated with a preference for the symmetrical type, whereas information motivation with a preference for the asymmetrical. Network heterogeneity was positively predicted by relationship motivation but not by information motivation. Finally, a relative preference for the symmetrical type was found to mediate the association between relationship motivation and network heterogeneity. 相似文献
96.
97.
98.
Shujie Liu Xianxuan Xu James H. Stronge 《Educational Assessment, Evaluation and Accountability》2016,28(2):161-177
Teacher performance evaluation currently is receiving unprecedented attention from policy makers, scholars, and practitioners worldwide. This study is one of the few studies of teacher perceptions regarding teacher performance measures that focus on China. We employed a quantitative dominant mixed research design to investigate Chinese teachers’ preferences for teacher performance measures and the possible reasons for their preferences. Considering the quantitative results, the surveyed Chinese teachers identified fulfillment of additional roles, collaboration with faculty and staff, and students’ test scores as the most important measures for performance evaluation. Qualitatively, the most important measures that the surveyed teachers reported were the teacher’s morality, workload, and students’ test scores. 相似文献
99.
Accelerometer-based systems are often used to quantify human movement. This study’s aim was to assess the reliability and validity of the Myotest® accelerometer-based system for measuring running stride kinematics. Twenty habitual runners ran two 60 m trials at 12, 15, 18 and 21 km·h?1. Contact time, aerial time and step frequency parameters from six consecutive running steps of each trial were extracted using Myotest® data. Between-trial reproducibility of measures was determined by comparing kinematic parameters from the two runs performed at the same speed. Myotest® measures were compared against photocell-based (Optojump Next®) and high-frequency video data to establish concurrent validity. The Myotest®-derived parameters were highly reproducible between trials at all running speeds (intra-class correlation coefficient (ICC): 0.886 to 0.974). Compared to the photo-cell and high-speed video-based measures, the mean contact times from the Myotest® were 34% shorter and aerial times were 64% longer. Only step frequency was comparable between systems and demonstrated high between-system correlation (ICC ≥ 0.857). The Myotest® is a practical portable device that is reliable for measuring contact time, aerial time and step frequency during running. In terms of validity, it provides accurate step frequency measures but underestimates contact time and overestimates aerial time compared to photocell- and optical-based systems. 相似文献
100.
Erica M. Buckeridge Anthony M.J. Bull Alison H. McGregor 《Journal of sports sciences》2016,34(4):369-378
Lumbar-pelvic kinematics change in response to increasing rowing stroke rates, but little is known about the effect of incremental stroke rates on changes in joint kinetics and their implications for injury. The purpose of this study was to quantify the effects of incremental rowing intensities on lower limb and lumbar-pelvic kinetics. Twelve female rowers performed an incremental test on a rowing ergometer. Kinematic data of rowers’ ankle, knee, hip and lumbar-pelvic joints, as well as external forces at the handle, seat and foot-stretchers of the rowing machine were recorded. Inter-segmental moments and forces were calculated using inverse dynamics and were compared across stroke rates using repeated measures ANOVA. Rowers exhibited increases in peak ankle and L5/S1 extensor moments, reductions in peak knee moments and no change in peak hip moments, with respect to stroke rate. Large shear and compressive forces were seen at L5/S1 and increased with stroke rate (P < 0.05). This coincided with increased levels of lumbar-pelvic flexion. High levels of lumbar-pelvic loading at higher stroke rates have implications with respect to injury and indicated that technique was declining, leading to increased lumbar-pelvic flexion. Such changes are not advantageous to performance and can potentially increase the risk of developing injuries. 相似文献