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   2778篇
  免费   83篇
  国内免费   45篇
教育   1819篇
科学研究   365篇
各国文化   85篇
体育   197篇
综合类   108篇
文化理论   24篇
信息传播   308篇
  2024年   3篇
  2023年   13篇
  2022年   68篇
  2021年   96篇
  2020年   101篇
  2019年   105篇
  2018年   113篇
  2017年   117篇
  2016年   100篇
  2015年   126篇
  2014年   159篇
  2013年   391篇
  2012年   159篇
  2011年   150篇
  2010年   158篇
  2009年   140篇
  2008年   120篇
  2007年   116篇
  2006年   123篇
  2005年   98篇
  2004年   70篇
  2003年   50篇
  2002年   55篇
  2001年   39篇
  2000年   21篇
  1999年   13篇
  1998年   17篇
  1997年   16篇
  1996年   12篇
  1995年   13篇
  1994年   9篇
  1993年   9篇
  1992年   5篇
  1991年   16篇
  1990年   6篇
  1989年   13篇
  1988年   6篇
  1986年   3篇
  1985年   6篇
  1984年   5篇
  1982年   3篇
  1981年   5篇
  1980年   3篇
  1979年   4篇
  1978年   5篇
  1975年   8篇
  1974年   4篇
  1973年   5篇
  1970年   3篇
  1968年   5篇
排序方式: 共有2906条查询结果,搜索用时 31 毫秒
61.
OBJECTIVE: Children who are physically maltreated are at risk of a range of adverse outcomes in childhood and adulthood, but some children who are maltreated manage to function well despite their history of adversity. Which individual, family, and neighborhood characteristics distinguish resilient from non-resilient maltreated children? Do children's individual strengths promote resilience even when children are exposed to multiple family and neighborhood stressors (cumulative stressors model)? METHODS: Data were from the Environmental Risk Longitudinal Study which describes a nationally representative sample of 1,116 twin pairs and their families. Families were home-visited when the twins were 5 and 7 years old, and teachers provided information about children's behavior at school. Interviewers rated the likelihood that children had been maltreated based on mothers' reports of harm to the child and child welfare involvement with the family. RESULTS: Resilient children were those who engaged in normative levels of antisocial behavior despite having been maltreated. Boys (but not girls) who had above-average intelligence and whose parents had relatively few symptoms of antisocial personality were more likely to be resilient versus non-resilient to maltreatment. Children whose parents had substance use problems and who lived in relatively high crime neighborhoods that were low on social cohesion and informal social control were less likely to be resilient versus non-resilient to maltreatment. Consistent with a cumulative stressors model of children's adaptation, individual strengths distinguished resilient from non-resilient children under conditions of low, but not high, family and neighborhood stress. CONCLUSION: These findings suggest that for children residing in multi-problem families, personal resources may not be sufficient to promote their adaptive functioning.  相似文献   
62.
OBJECTIVES: The study was designed to explore whether the credibility of children's statements regarding their alleged experiences of child sexual abuse could be assessed in a more valid and reliable way when investigative interviews were conducted using the NICHD protocol rather than in an unstructured manner. METHODS: Forty-two experienced Israeli youth investigators each assessed the credibility of allegations of sexual abuse made by alleged victims of sexual abuse when interviewed either with or without the protocol. Half of the alleged incidents were judged likely to have happened ("plausible") on the basis of independent evidence, while half were deemed unlikely to have happened ("implausible"). RESULTS: More non-protocol than protocol interviews were rated as "No judgment possible" rather than either credible or incredible. Allegations made in protocol interviews were more accurately rated as credible or incredible when they were either plausible or implausible, respectively, than those made in non-protocol statements. Levels of inter-rater reliability were also higher when protocol interviews were rated. The differences were significant only for plausible cases, however. CONCLUSIONS: The use of the NICHD protocol facilitated the assessment of credibility by child investigators although incredible allegations (those describing incidents that were unlikely to have happened) remained difficult to detect, even when the protocol was used.  相似文献   
63.
"EDA技术与应用"实验与实践教学改革   总被引:3,自引:1,他引:2  
通过对EDA技术与应用课程教学内容、实验教学手段、实践教学方法等几个方面的研究,根据近几年的教学经验,对EDA技术与应用课程的教学内容进行了定位。针对目前高校EDA(electronic designautomation,电子设计自动化)技术教学中的各种缺点,并结合实际的教学特点,提出几种改革创新方法。  相似文献   
64.
挥发性有机物(VOCs)的污染与控制技术日益受到重视。近年来发展起来的非平衡等离子体技术在治理VOCs方面已初步显示其独特的技术优势,现已成为废气治理研究领域中的前沿热点课题之一。等离子体法降解VOCs的机理较为复杂,研究不同线路对VOCs降解过程的影响意义重大。采用脉冲电晕放电等离子体技术,建立了混合电晕、有机电晕、空气电晕和分别电晕4种不同的实验方案,选取苯为代表物质进行实验研究,在初始浓度、停留时间和电源参数等一定的条件下,考察脉冲电压对苯去除率的影响。结果表明,电压为140kV、混合电晕时苯的去除率达到82.73%,脉冲电晕技术处理低浓度有机废气效果较好。  相似文献   
65.
转变观念加强培训建设一流实验队伍   总被引:5,自引:1,他引:4  
实验队伍作为实验室建设和发展的中坚力量,是实验室建设和管理的关键因素,加强实验队伍建设是建设一流实验室的重要保证.从4个方面分析、讨论了目前高校实验队伍中存在的一些问题,并提出从"转变观念"、"优化结构"、"完善体制"、"加强培训"等几方面加强实验队伍建设、提高整体素质的改革建议和举措.  相似文献   
66.
Ethnic–racial identity (ERI) development and ethnic–racial discrimination are two salient experiences among adolescents in the United States. Despite growing awareness of the costs and benefits of these experiences individually, we know little about how they may influence one another. The current study examined competing hypotheses relating discrimination and components of ERI (i.e., exploration, resolution, affirmation) among a sample of Mexican-origin adolescent mothers (N = 181; Mage at Wave 1 = 16.83, SD = 1.01) across six waves of data. Findings revealed that within-person changes in discrimination predicted subsequent ERI resolution and affirmation; however, ERI did not predict subsequent discrimination. Between-person effects of discrimination on affirmation were significant. Our findings underscore the importance of discrimination experiences in shaping Mexican-origin adolescent mothers’ normative developmental competencies.  相似文献   
67.
The present study examined the interplay between self-determined motivation and the use of cognitive strategies in predicting university students’ academic performance while taking into account the effect of prior achievement. A theory based model was tested using structural equation modeling on a sample of 764 Italian university students. Results showed that prior achievement influenced students’ academic performance and their motivation and use of cognitive strategies. Critical thinking was the only cognitive strategy which proved to have a significant impact on students’ academic performance. Autonomous motivation had an indirect positive impact on academic performance through its influence on the critical thinking strategy. Controlled motivation had a direct negative impact on academic performance. On the whole, our findings suggest that autonomously motivated students tend to achieve better academic performance by using critical thinking, while students who are driven by controlled motivation have lower academic performance.  相似文献   
68.
This article is based on data generated in an ethnographic study of gender in a Swedish preschool. Drawing on Judith Butler’s understanding of performativity and (un)doing of gender, a new theoretical concept, situated decoding of gender, is further developed by showing how the material and spatial dimension of the educational practice and the teachers’ actions contribute to establishing and maintaining this process in an early childhood educational setting. Instead of normalising the gender binary, a reverse process occurs that turns what is perceived as feminine or masculine into a gender decoded state in which gender is made less relevant, or even irrelevant. It is argued that this continuous reiterative process emerges and is maintained by three main factors: (a) the preschool’s physical environment, (b) the regular and repetitive structure of the educational practice and (c) the consistent actions of the teachers in the everyday practice.  相似文献   
69.
弗莱雷毕生致力于成人教育,他的成人教育思想一直广为流传。本文试图从成人教育的目的、内容、方法等三个方面进行描述,并探索其对我国西部农村成人教育的启示。  相似文献   
70.
介绍了一种基于SPI协议的音频解码芯片VS1003,详细介绍了VS1003芯片的读写机制,并给出了VS1003与单片机LPC2131的接口电路图,重点介绍了如何采用VS1003的SCI和SDI实现与LPC2131通信的软件流程图。  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