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   3475篇
  免费   67篇
  国内免费   228篇
教育   1511篇
科学研究   918篇
各国文化   16篇
体育   72篇
综合类   88篇
文化理论   5篇
信息传播   1160篇
  2023年   34篇
  2022年   69篇
  2021年   75篇
  2020年   107篇
  2019年   87篇
  2018年   96篇
  2017年   78篇
  2016年   66篇
  2015年   91篇
  2014年   180篇
  2013年   258篇
  2012年   261篇
  2011年   244篇
  2010年   193篇
  2009年   206篇
  2008年   290篇
  2007年   242篇
  2006年   228篇
  2005年   173篇
  2004年   182篇
  2003年   174篇
  2002年   115篇
  2001年   143篇
  2000年   91篇
  1999年   43篇
  1998年   18篇
  1997年   3篇
  1996年   5篇
  1995年   3篇
  1993年   2篇
  1992年   2篇
  1991年   4篇
  1990年   2篇
  1989年   2篇
  1988年   1篇
  1957年   2篇
排序方式: 共有3770条查询结果,搜索用时 15 毫秒
81.
刘亨 《体育科研》2019,(1):30-35
江湾体育场是上海市五角场地区的一个地标性建筑,它在1935年建成之后的八十多年中,对上海市民的体育文化生活产生了巨大的影响。《申报》作为中华人民共和国成立之前沪上最知名甚至是全国知名的报纸,它所刊登的报道较能真实地还原当时上海的社会风貌。通过查阅《申报》关于江湾体育场筹备和建设的报道,调查江湾体育场建设的动因、进程和民众对于它的态度,重构上海及全国民众对于江湾体育场的历史记忆。研究发现:1934-1935年间,《申报》对江湾体育场的报道主要集中在筹备过程和落成之后,筹备过程中的报道主要围绕体育场的建设规划和前期准备等方面;落成之后,报道的内容转变为以对体育场的介绍为主。  相似文献   
82.
This systematic review includes 34 studies examining the effects of school-based physical activity interventions on students' health-related fitness knowledge. The study design, methodological quality, and effectiveness of interventions on students' health-related fitness knowledge were analysed. The majority of the studies (79.4%) revealed significant positive intervention effects on students' health-related fitness knowledge. Studies examining adolescents were more frequently in a position to influence students' health-related fitness knowledge (87.5%) than studies examining children (75%), and studies with low methodological quality (88.8%) had more frequent positive effects than studies with moderate quality (75%). The effects on students' health-related fitness knowledge were independent of moderator variables such as the intervention content, duration and frequency. Only few studies were able to simultaneously positively influence students' health-related fitness knowledge and students' physical activity and/or fitness levels. These programmes can positively influence students' health-related fitness knowledge, but it remains unclear what the practical significance of these changes is. Further research is needed to clarify the influence of students' health-related fitness knowledge on reflection, understanding, physical activity behaviour, and overall physical literacy levels.  相似文献   
83.
Going beyond the traditional socioeconomic status model of political participation, this study examines pathways that lead to the sociopolitical incorporation of immigrants in the USA, with a focus on the role of communication socialization agents. Using a Current Population Survey sample of 7,626 first-generation immigrants in the USA, results show that communication socialization agents significantly contribute to immigrants’ political socialization, and an important mediating path translates political learning into greater political engagement. Results also identify ethnic differences in how socialization variables affect immigrants’ socialization.  相似文献   
84.
To reduce information technology (IT) development costs, more firms have begun to outsource IT-related activities by partnering with IT vendors. As knowledge is a valuable asset in IT development, knowledge sharing between vendors and business clients becomes critical. However, the motivation behind IT vendors’ willingness to share knowledge with client firms is not sufficiently understood. To shed light on the nature of knowledge sharing within vendor–client partnerships, we examine the influence of performance feedback and managerial mindset on vendors’ motivation to share knowledge with their clients. We adopt a multi-method approach involving both a scenario-based field experiment with 164 vendor managers (Study 1) and a field survey of 112 vendor managers involved in IT development (Study 2). We find that when vendors’ performance exceeds their aspiration levels, they are motivated to share knowledge with clients. Such motivational effects are more pronounced for vendor managers exhibiting abstract mindsets. Our study is of significant value to researchers and practitioners, affording both groups a keener, deeper, and more robust appreciation for how knowledge sharing in vendor–client partnerships can be managed more effectively.  相似文献   
85.
提出一种基于多尺度Gabor滤波特征提取和稀疏表示的SAR图像目标识别方法。首先,在目标分割的基础上,利用Gabor滤波器对SAR目标图像在不同方向上进行滤波,增强目标的局部特征;然后,根据稀疏表示模型,以训练样本特征为原子构建字典,利用稀疏求解算法选择最优的原子集合来表示测试样本特征,进而计算表示系数中非负值的l1范数来判别测试样本。实验结果验证了该算法的有效性与鲁棒性。  相似文献   
86.
采用文献资料法、逻辑推理法并结合田野考察法,以文化人类学和社会表征理论为依托,阐释藏羌走廊民族传统体育文化符号表征的意义。研究认为:藏羌走廊民族传统体育文化符号具有“三征并存”的功能结构和“三化并行”的功能价值。通过对藏羌走廊民族传统体育文化符号表征的研究,对藏羌走廊民族传统体育文化资源的传承与发展,以及人类学家和民族学家对民族传统体育文化符号的深层次研究具有导向作用。  相似文献   
87.
This article briefly discusses the long history of violence towards disabled people which sets the context for an analysis of the modern‐day form of violence known as disability hate crime (DHC). People who look or behave differently to others often find themselves victims of violent crimes. The language used to describe disabled people contributes to their diminished position in society. A brief review of definitions of DHC and exploration of news media coverage of the Pilkington and Askew DHC cases are undertaken. Cultural scapegoating of disabled people is discussed. Disabled people are perceived as contributing to their own victimisation, the lack of support afforded to them by society and the failure of systems meant to protect them. As long as disabled people remain outside mainstream society, they are unlikely to achieve the same levels of respect and protection from crime that other groups in society are afforded.  相似文献   
88.
Engagement in problem‐solving and mathematical discussion is critical for learning mathematics. This research review describes a gap in the literature surrounding engagement of students with Learning Disabilities in standards‐based mathematical classrooms. Taking a sociocultural view of engagement as participation in mathematical practices, this review found that students with LD were supported towards equal engagement in standards‐based mathematics through multi‐modal curriculum, consistent routines for problem‐solving, and teachers trained in Mathematical Knowledge for Teaching. Using this small set of studies (7), we identify the need to deepen the engagement of students with LD in mathematical problem‐solving and discussion. This review concludes with implications for teaching and learning.  相似文献   
89.
提出一种基于协同表示的新的目标跟踪算法.在贝叶斯框架下,采用基于重构误差的观测似然函数和考虑遮挡的模型更新机制设计一个鲁棒的跟踪器.用l1范数来建模重构误差以更好地容忍奇异值,同时用协同表示对编码系数进行约束.实验结果表明,和其他算法相比,本文算法能够战胜遮挡、尺度变化、光照变化、背景混乱等干扰因素,具有较高的准确度和鲁棒性.  相似文献   
90.
This study explores the potential of blockchain technology in enhancing trust among the stakeholders responsible for the maintenance of rolling stock. Although the technology has been widely successful in the financial sector, it is still novel in the maintenance field. Given the customized nature of maintenance processes, it is unclear if a suitable consensus protocol can be identified that can enhance trust among stakeholders. This problem is investigated through the lens of the Design Science Research Methodology. First, the theoretical background of blockchain technology and its role in enhancing trust are explained, followed by the analysis of a current case at a Railway company to test the proof of concept. A business network archive is developed for the maintenance management of the sliding step of the train door system. The archive encompasses the business logic and transactional data required to enhance trust among stakeholders in the quality of performed maintenance. The developed archive is deployed on Hyperledger Fabric and the effectiveness of the solution is evaluated through a survey. The results show that the developed business network, deployed on a customized Hyperledger Fabric consensus protocol, enhanced trust among the stakeholders involved.  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