首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   20038篇
  免费   270篇
  国内免费   130篇
教育   13983篇
科学研究   2433篇
各国文化   206篇
体育   1681篇
综合类   12篇
文化理论   169篇
信息传播   1954篇
  2021年   142篇
  2020年   263篇
  2019年   409篇
  2018年   547篇
  2017年   496篇
  2016年   534篇
  2015年   337篇
  2014年   417篇
  2013年   3710篇
  2012年   383篇
  2011年   429篇
  2010年   341篇
  2009年   338篇
  2008年   368篇
  2007年   379篇
  2006年   348篇
  2005年   362篇
  2004年   346篇
  2003年   325篇
  2002年   335篇
  2001年   323篇
  2000年   342篇
  1999年   351篇
  1998年   186篇
  1997年   204篇
  1996年   231篇
  1995年   221篇
  1994年   181篇
  1993年   187篇
  1992年   265篇
  1991年   285篇
  1990年   282篇
  1989年   304篇
  1988年   248篇
  1987年   277篇
  1986年   266篇
  1985年   303篇
  1984年   275篇
  1983年   267篇
  1982年   223篇
  1981年   213篇
  1980年   190篇
  1979年   289篇
  1978年   243篇
  1977年   221篇
  1976年   181篇
  1975年   169篇
  1974年   177篇
  1973年   159篇
  1971年   142篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
141.
142.
143.
The problem of the construction of the optimal model of the automated control system of a Russian higher-education institution (the ACS of an RHEI) is studied. This term appeared in the 1970s–1980s and served as the beginning of a project that covered more than 50 of the largest higher-education institutions of the country and is also relevant today. Two main approaches to construction of an automated control system of Russian higher-education institutions are specified, viz., the development of a system using its own resources and the use of the product from a third-party developer. Examples of the application of these approaches are given and the structure of the elements (modules) of the systems is described. The necessity to search for the optimal structure of the elements included in the ACS of an RHEI is specified for most educational organizations taking their dimensions into account and their specific sectoral character, as well as the total expenditures for the acquisition (development) and support of the systems. An example of the structure of the optimal model and a third (combined) approach to its construction is given.  相似文献   
144.
145.
The British Journal of Educational Technology (BJET) uses a novel system for obtaining referees by e‐mailing the abstracts of submissions to a panel of over 250 referees and allowing these individuals to choose which papers they would like to review. An analysis of 13 experienced referees showed that, of 473 reviews assessed, these referees were slightly more lenient than the editor and that electronic records provide useful data that can be mined in interesting ways.  相似文献   
146.
We conduct an analysis of 1835 pledges to 10 music production projects hosted on the largest Brazilian crowdfunding platform, namely the Catarse Web site, and we assess the relation between the fundraising accumulation period, the donor–entrepreneur distance and the propensity of donors to back projects. Our results suggest a significantly negative association between distance and the value of capital pledged to projects, which is consistent with the notion that the entrepreneur’s network of close contacts might play a central role in funding. Furthermore, our results contradict the idea that crowdfunding reduces the inhibiting effect of donor–entrepreneur distance. In addition, the results show that a long project exposure is associated with higher values of pledges. These results suggest practical implications for the study of crowdfunding as a financing platform. This study contributes to the literature on the use of crowdfunding as an alternative funding source in a major emerging market.  相似文献   
147.
This study investigated the combined role of instructor communication variables (nonverbal immediacy and self-disclosure), instructor credibility (competence, caring, and trustworthiness), and student personality traits (extraversion, neuroticism, agreeableness, conscientiousness, and openness) in predicting students’ uncivil behaviors in class. A total of 406 students completed online questionnaires regarding the instructor of the class they attended prior to the one in which the study was administered. Personality and instructor behavior variables contributed approximately equally to explaining variance in student incivility. Students’ conscientiousness and agreeableness had direct negative relationships with incivility, whereas instructors’ amount and negativity of self-disclosure had direct positive relationships with incivility.  相似文献   
148.
This study examined whether perceived message effectiveness (PE) predicted information-seeking behavior in the topical domain of colon cancer. Participants (N = 277) viewed one of three video messages (news, testimonial, and animation) that advocated screening for colon cancer. Information-seeking behavior was operationalized as reading time for a subsequent message about colon cancer. The proposed mediation model successfully reproduced the pattern of data, thereby providing evidence that PE predicts behavior via intention.  相似文献   
149.
Pornography use is often associated with less-progressive sex-role attitudes, such as endorsement of a sexual double standard between heterosexual partners, but the process by which this relationship occurs is still largely unexamined. The present study was conducted to examine how perceptions about pornography may play a role in the relationship between pornography use and sex-role attitudes. Perceived general acceptance and perceived influence of pornography on most people partially mediated the relationship between pornography use and sex-role attitudes. The more participants reported using pornography, the more they believed pornography was generally accepted and had a positive influence; however, conversely to what was hypothesized, the more positive they perceived pornography’s influence, the less likely they were to report sex-role attitudes that endorse a sexual double standard.  相似文献   
150.
K. R. Shivanna 《Resonance》2016,21(11):1007-1018
After the pollen grain reaches the stigma through outsourced agents (pollinators), the next step before fertilization is to select the right type of pollen. Similar to a marriage in human beings, fiowering plants also have evolved elaborate screening process to select the right pollen grains and to reject the wrong ones. Even after initial screening for the right pollen, the pistil imposes a tough competition amongst them, comparable to a swayamvara of Indian mythology, to select the best available pollen. Flowering plants have evolved into a matriarchal society. The selection of the male partner is totally the prerogative of the mother (pistil); the boy (pollen grain) and the girl (ovule) has no say in this selection.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号