全文获取类型
| 收费全文 | 19450篇 |
| 免费 | 263篇 |
| 国内免费 | 79篇 |
专业分类
| 教育 | 12800篇 |
| 科学研究 | 2524篇 |
| 各国文化 | 380篇 |
| 体育 | 1567篇 |
| 综合类 | 223篇 |
| 文化理论 | 125篇 |
| 信息传播 | 2173篇 |
出版年
| 2022年 | 119篇 |
| 2021年 | 250篇 |
| 2020年 | 298篇 |
| 2019年 | 387篇 |
| 2018年 | 522篇 |
| 2017年 | 528篇 |
| 2016年 | 500篇 |
| 2015年 | 386篇 |
| 2014年 | 589篇 |
| 2013年 | 3111篇 |
| 2012年 | 569篇 |
| 2011年 | 617篇 |
| 2010年 | 554篇 |
| 2009年 | 535篇 |
| 2008年 | 611篇 |
| 2007年 | 559篇 |
| 2006年 | 526篇 |
| 2005年 | 435篇 |
| 2004年 | 439篇 |
| 2003年 | 303篇 |
| 2002年 | 320篇 |
| 2001年 | 390篇 |
| 2000年 | 404篇 |
| 1999年 | 346篇 |
| 1998年 | 180篇 |
| 1997年 | 224篇 |
| 1996年 | 191篇 |
| 1995年 | 150篇 |
| 1994年 | 169篇 |
| 1993年 | 151篇 |
| 1992年 | 286篇 |
| 1991年 | 258篇 |
| 1990年 | 258篇 |
| 1989年 | 282篇 |
| 1988年 | 238篇 |
| 1987年 | 217篇 |
| 1986年 | 211篇 |
| 1985年 | 247篇 |
| 1984年 | 192篇 |
| 1983年 | 188篇 |
| 1982年 | 150篇 |
| 1981年 | 130篇 |
| 1980年 | 133篇 |
| 1979年 | 214篇 |
| 1978年 | 142篇 |
| 1977年 | 136篇 |
| 1976年 | 121篇 |
| 1975年 | 108篇 |
| 1974年 | 135篇 |
| 1973年 | 119篇 |
排序方式： 共有10000条查询结果，搜索用时 15 毫秒
1.
2.
3.
ABSTRACT This article offers a textual analysis and semiotic reading of the Rich Kids of Tehran's (RKOT’s) Instagram page. Contributing to scholarship on Iranian youth media practices, this article interrogates how the RKOT navigate urban and rural space to engage in everyday processes of resistance against global and local systemic oppression. Grounding their visual representations on Instagram in historical and cultural context, the author questions how and when quotidian actions are transformed into political transgressions when posted on social media. This article emphasizes the RKOT's agency in shaping their brand by analyzing representations of gender performance, intertextuality, and national identity on Instagram. 相似文献
4.
Megan K. Schraedley Hamilton Bean Sarah E. Dempsey Mohan J. Dutta Kathleen P. Hunt Sonia R. Ivancic 《Journal of Applied Communication Research》2020,48(2):166-185
ABSTRACTThis forum brings together food, (in)security, and communication. The authors participating in this forum center communication as both process and tool for understanding, mitigating, and making meaning of food (in)security. The nine authors together discuss the role of communication in food (in)security, the central challenges for scholars and practitioners working on food (in)security, and the creative possibilities and impacts influencing the future of food (in)security. The forum produces a call for applied scholars to re-imagine communication frameworks in order to make meaningful differences in their communities. 相似文献
5.
In the IR field it is clear that the value of a system depends on the cost and benefit profiles of its users. It would seem obvious that different users would prefer different systems. In the TREC-9 filtering track, systems are evaluated by a utility measure specifying a given cost and benefit. However, in the study of decision systems it is known that, in some cases, one system may be unconditionally better than another. In this paper we employ a decision theoretic approach to find conditions under which an Information Filtering (IF) system is unconditionally superior to another for all users regardless of their cost and benefit profiles.It is well known that if two IF systems have equal precision the system with better recall will be preferred by all users. Similarly, with equal recall, better precision is universally preferred. We confirm these known results and discover an unexpected dominance relation in which a system with lower recall will be universally preferred provided its precision is sufficiently higher. 相似文献
6.
7.
高校体育教师的生命力来自于体育科学研究。高校体育教师必须与体育科学研究紧密的联系在一起。高校体育科学研究就是以高校体育教育现象和体育教育问题为对象,运用科学研究的原则和方法,探寻体育教学规律及有体育教育途径和方法的科学实践活动.努力提高高校体育教师的体育科学研究水平,有利于提高高校体育教师的整体素质,有利于教育科研的发展,提高教育质量。 相似文献
8.
9.
在对关键词进行一般描述的基础上,论述了科技论文关键词标引的意义,分析目前科技论文关键词标引中存在的问题,并提出相应的对策. 相似文献
10.
Sports Engineering - A Monark cycle ergometer is a device globally used in physiological studies to measure the work and energy levels of exercising humans. In this paper a rope-braked cycle... 相似文献