全文获取类型
收费全文 | 22436篇 |
免费 | 326篇 |
国内免费 | 60篇 |
专业分类
教育 | 16560篇 |
科学研究 | 1534篇 |
各国文化 | 264篇 |
体育 | 1656篇 |
综合类 | 48篇 |
文化理论 | 185篇 |
信息传播 | 2575篇 |
出版年
2022年 | 122篇 |
2021年 | 247篇 |
2020年 | 373篇 |
2019年 | 538篇 |
2018年 | 699篇 |
2017年 | 774篇 |
2016年 | 715篇 |
2015年 | 464篇 |
2014年 | 624篇 |
2013年 | 4548篇 |
2012年 | 615篇 |
2011年 | 647篇 |
2010年 | 551篇 |
2009年 | 535篇 |
2008年 | 586篇 |
2007年 | 553篇 |
2006年 | 551篇 |
2005年 | 512篇 |
2004年 | 377篇 |
2003年 | 379篇 |
2002年 | 349篇 |
2001年 | 455篇 |
2000年 | 383篇 |
1999年 | 313篇 |
1998年 | 220篇 |
1997年 | 237篇 |
1996年 | 248篇 |
1995年 | 198篇 |
1994年 | 215篇 |
1993年 | 194篇 |
1992年 | 283篇 |
1991年 | 265篇 |
1990年 | 292篇 |
1989年 | 263篇 |
1988年 | 230篇 |
1987年 | 222篇 |
1986年 | 237篇 |
1985年 | 235篇 |
1984年 | 236篇 |
1983年 | 225篇 |
1982年 | 177篇 |
1981年 | 172篇 |
1980年 | 170篇 |
1979年 | 229篇 |
1978年 | 203篇 |
1977年 | 138篇 |
1976年 | 142篇 |
1975年 | 128篇 |
1973年 | 114篇 |
1971年 | 124篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
101.
I. V. Zibareva L. Yu. Ilina B. L. Alperin 《Scientific and Technical Information Processing》2018,45(2):106-109
The current state of the Russian Science Citation Index is analyzed. Several areas for its further development identified by long-standing active users, such as data searching, refinement, and storage; current user alerts; data input with the Science Index license; patent information; and the application programming interface (API) are investigated. 相似文献
102.
Michael M. Widdersheim 《Library & information science research》2018,40(2):144-152
History and case study are two diachronic research strategies commonly used to study political discourse as it relates to public libraries. Though suitable for some studies, these strategies are inexhaustive. A new, blended research strategy is therefore needed to accomplish what history and case study alone cannot. This hybrid strategy, historical case study, must analyze cases from the distant past to the present, using eclectic data sources, in order to produce both idiographic and nomothetic knowledge. To develop historical case study, the universal components of diachronic analysis are first identified. A general research design for historical case study is then introduced. Finally, historical case study is tested in an actual research project. Findings from this project reveal that historical case study is a successful diachronic research strategy. Historical case study is a new and valuable research design suitable for addressing questions related to change, continuity, development, and evolution. 相似文献
103.
Nathan Walter Sheila T. Murphy Erica L. Rosenthal 《Communication Research Reports》2018,35(5):402-412
The study explored the role of second-screen use and binge-watching in moderating entertainment education (EE) effects. A pretest/posttest experiment of 273 viewers of East Los High measured the effects of exposure to three subplots, concerning alcohol abuse, abortion, and immigration. The effect of identification with characters on change in attitudes was significantly moderated by second-screen use and binge-watching. In particular, second-screening tended to enhance the positive impact of identification; whereas, among respondents who binge-watched the show, the effects of identification were weaker. 相似文献
104.
John A. Velez David R. Ewoldsen Michael D. Hanus Hyunjin Song Jonathan A. Villarreal 《Communication Research Reports》2018,35(5):424-433
This study examines how social comparison information provided by video game leaderboards may influence players’ retrospective judgments of autonomy, competence, and relatedness need fulfillment. Participants played a video game and were randomly assigned to receive no postgame feedback or were shown a leaderboard that placed them in the top or bottom quartile of players. Results indicate downward social comparisons increase enjoyment by increasing competence and relatedness perceptions. However, upward comparisons did not have an opposite effect, nor did either type of social comparison influence players’ autonomy perceptions. Implications for applying Self-Determination Theory to video game enjoyment in the context of social comparison feedback is discussed. 相似文献
105.
Stacy L. Young Manuel D. Pulido Catherine F. Brooks 《Communication Research Reports》2018,35(2):172-177
This study extends instructional communication research on extra-class communication (ECC) by presenting an integrative analysis comparing the explanatory utility of student- and instructor-oriented reasons for student engagement in frequent ECC. Results from 495 college students suggested that student-oriented reasons, specifically the relational and functional student motives, were the only significant, positive predictors of students’ perceptions of frequent ECC engagement. Other student motives (excuse making, participation, sycophancy) and perceptions of instructor approachability did not significantly predict perceived frequency of ECC engagement. 相似文献
106.
Jayson L. Dibble 《Communication Research Reports》2018,35(2):112-120
Is the reluctance to share bad news (i.e., the MUM effect) motivated more by a public display or private concern, and does it benefit mainly the messenger or the recipient? An experiment (N = 309) that crossed good/bad news with three communication channels (face-to-face, text messaging, e-mail) revealed that messenger reluctance was greatest under conditions of bad news and did not vary based on the channel through which the recipient contacted the messenger. In contrast with earlier work, this MUM effect was more consistent with a private fear of distressing the recipient. Theoretical implications and limitations are discussed. 相似文献
107.
This paper examines the persistence of Americans’ misunderstanding of the function of privacy policies. We also identify groups that have misplaced confidence in the privacy policy label and address whether the groups’ patterns of misperception have changed over time. The findings add a new dimension to the argument that the usefulness of privacy policies needs to be reassessed. As a remedy, we call for media literacy programs to address structural features of media systems that lead to broadly held misperceptions such as the one examined here. 相似文献
108.
Elena Rudkowsky Martin Haselmayer Matthias Wastian Marcelo Jenny Štefan Emrich Michael Sedlmair 《Communication methods and measures》2018,12(2-3):140-157
ABSTRACTMoving beyond the dominant bag-of-words approach to sentiment analysis we introduce an alternative procedure based on distributed word embeddings. The strength of word embeddings is the ability to capture similarities in word meaning. We use word embeddings as part of a supervised machine learning procedure which estimates levels of negativity in parliamentary speeches. The procedure’s accuracy is evaluated with crowdcoded training sentences; its external validity through a study of patterns of negativity in Austrian parliamentary speeches. The results show the potential of the word embeddings approach for sentiment analysis in the social sciences. 相似文献
109.
110.