全文获取类型
收费全文 | 17200篇 |
免费 | 111篇 |
国内免费 | 19篇 |
专业分类
教育 | 11697篇 |
科学研究 | 2017篇 |
各国文化 | 150篇 |
体育 | 1467篇 |
综合类 | 21篇 |
文化理论 | 208篇 |
信息传播 | 1770篇 |
出版年
2022年 | 139篇 |
2021年 | 201篇 |
2020年 | 284篇 |
2019年 | 375篇 |
2018年 | 527篇 |
2017年 | 548篇 |
2016年 | 504篇 |
2015年 | 319篇 |
2014年 | 466篇 |
2013年 | 2853篇 |
2012年 | 441篇 |
2011年 | 410篇 |
2010年 | 406篇 |
2009年 | 353篇 |
2008年 | 380篇 |
2007年 | 396篇 |
2006年 | 373篇 |
2005年 | 310篇 |
2004年 | 322篇 |
2003年 | 283篇 |
2002年 | 320篇 |
2001年 | 362篇 |
2000年 | 375篇 |
1999年 | 309篇 |
1998年 | 182篇 |
1997年 | 221篇 |
1996年 | 210篇 |
1995年 | 146篇 |
1994年 | 152篇 |
1993年 | 141篇 |
1992年 | 235篇 |
1991年 | 202篇 |
1990年 | 245篇 |
1989年 | 233篇 |
1988年 | 202篇 |
1987年 | 215篇 |
1986年 | 200篇 |
1985年 | 234篇 |
1984年 | 173篇 |
1983年 | 149篇 |
1982年 | 147篇 |
1981年 | 130篇 |
1980年 | 142篇 |
1979年 | 206篇 |
1978年 | 161篇 |
1977年 | 130篇 |
1976年 | 109篇 |
1975年 | 117篇 |
1974年 | 116篇 |
1973年 | 115篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
Renuka Mahajan J. S. Sodhi Vishal Mahajan 《Education and Information Technologies》2016,21(1):123-148
An important research area in education and technology is how the learners use e-learning. By exploring the various factors and relationships between them, we can get an insight into the learners’ behaviors for delivering tailored e-content required by them. Although many tools exist to record detailed navigational activities, they don’t explore the learners’ usage patterns for an adaptive e-learning site. The previous web log data analyses, done so far, have been very limited in their scope as they lack detailed empirical results on the learning technology usage. This paper discusses the detailed results of a case study of web data mining in a specific e-learning application. The main objective of this study is to conduct research on usability and effectiveness of the e-content by analyzing the web log. For this, a suitable data set was retrieved from raw web log records, to which various web mining & statistical techniques could be applied. We have evaluated different features of e-content that can lead to better learning outcomes for the learners, by understanding their navigational behaviors, their interaction with system and their area of interest. We found, for example, what sequence of topics were the most liked and the least liked by the learners; we also found that these patterns, lead us to hypothesize, the correlation and regression analysis between the average time, test score and total attempts. 相似文献
993.
994.
The longitudinal development of the intraindividual coupling between academic achievement, interest, and self-concept of ability (SCA) was analyzed in a sample of approximately 1,000 children between grades 1 and 12 (ages 6-17). Across all calculated indexes, the average level of coupling was positive. Individuals generally felt competent and interested in domains where they achieve well, and were interested in domains where they perceive their personal strengths. The degree of coupling was the highest between interest and SCA and the lowest between interest and achievement. For all indexes, evidence for an increase in coupling across time was found. Female gender was related to a lower level of coupling. There was evidence for a positive effect of conscientiousness on the amount of coupling. 相似文献
995.
Physica is an integrated software package designed as part of a course for distance learning students from non-traditional educational backgrounds. It gives students access to an extensive hyperlinked physics glossary, computer algebra and graph-plotting tools. The package aims to give students a framework for solving physics problems and to help them acquire some higher level skills of quantitative problem-solving. This paper outlines rationales underlying various protocols for solving physics problems, and discusses the extent to which frameworks may be useful in helping students develop appropriate strategies for representing problems in formal terms, selecting targets, planning solutions and checking answers. Pedagogical issues underlying the design and implementation of the software are discussed. 相似文献
996.
Developmental theories often assume that specific environmental risks affect specific outcomes. Canonical Correlation Analysis was used to test whether 28 developmental outcomes (measured at 11–15 years) share the same early environmental risk factors (measured at 0–3 years), or whether specific outcomes are associated with specific risks. We used data from the UK Millennium Cohort Study (N = 10,376, 51% Female, 84% White) collected between 2001 and 2016. A single environment component was mostly sufficient for explaining cognition and parent-rated behavior outcomes. In contrast, adolescents’ alcohol and tobacco use were specifically associated with their parents’, and child-rated mental health was weakly associated with all risks. These findings suggest that with some exceptions, many different developmental outcomes share the same early environmental risk factors. 相似文献
997.
998.
Charles C. Helwig Sharon To Qian Wang Chunqiong Liu Shaogang Yang 《Child development》2014,85(3):1150-1167
This study examined judgments and reasoning about four parental discipline practices (induction or reasoning and three practices involving “psychological control”; Barber, 1996; two forms of shaming and love withdrawal) among children (7–14 years of age) from urban and rural China and Canada (N = 288) in response to a moral transgression. Children from all settings critically evaluated love withdrawal and preferred induction. Despite being perceived as more common in China than in Canada, with age, parental discipline based on shaming or love withdrawal was increasingly negatively evaluated and believed to have detrimental effects on children's feelings of self‐worth and psychological well‐being. Some cultural variations were found in evaluations of practices, perceptions of psychological harm, and attribution of parental goals. 相似文献
999.
The effects of teacher-delivered social reinforcers on the task persistent behavior of children enrolled in an intermediate class for the educable mentally retarded were studied. These children were grouped with a regular fourth grade class during a social studies period in which the study was conducted. The special education children were randomly divided into two groups, with seven children in each group. Using a reversal design, social reinforcers were delivered contingent upon the task persistent behavior of the seven target children. The seven youngsters in the control, or nonreinforcement, group were essentially ignored as they engaged in appropriate task-related behaviors. The results clearly show that increases in the level of task persistent behavior and the administration of social reinforcement were functionally related. The level of task persistent behavior emitted by the control children was not affected by reinforcement delivered to their peers. 相似文献
1000.
This paper reports on efforts aimed toward the development of more effective procedures for identifying mothers who are at elevated risk for problems in parenting. We present data from two independent samples of known maladaptors and corresponding comparison mothers and report on our attempts to cross-validate a promising screening instrument composed of items that index social support and parenting attitudes. The resultant 20-item scale correctly identified over 90% of maladaptive and comparison mothers. When this scale was cross-validated on a second independent sample of maladaptors and comparison mothers, it was again almost 90% accurate. Issues concerning the field application of this promising instrument are discussed and its possible limitations are considered. 相似文献