全文获取类型
收费全文 | 17447篇 |
免费 | 288篇 |
国内免费 | 269篇 |
专业分类
教育 | 12755篇 |
科学研究 | 1473篇 |
各国文化 | 172篇 |
体育 | 1261篇 |
综合类 | 1111篇 |
文化理论 | 27篇 |
信息传播 | 1205篇 |
出版年
2024年 | 4篇 |
2023年 | 53篇 |
2022年 | 145篇 |
2021年 | 227篇 |
2020年 | 340篇 |
2019年 | 284篇 |
2018年 | 214篇 |
2017年 | 215篇 |
2016年 | 262篇 |
2015年 | 365篇 |
2014年 | 873篇 |
2013年 | 1102篇 |
2012年 | 1251篇 |
2011年 | 1386篇 |
2010年 | 979篇 |
2009年 | 1015篇 |
2008年 | 1174篇 |
2007年 | 1391篇 |
2006年 | 1323篇 |
2005年 | 1168篇 |
2004年 | 996篇 |
2003年 | 944篇 |
2002年 | 660篇 |
2001年 | 530篇 |
2000年 | 313篇 |
1999年 | 134篇 |
1998年 | 69篇 |
1997年 | 81篇 |
1996年 | 59篇 |
1995年 | 30篇 |
1994年 | 29篇 |
1993年 | 20篇 |
1992年 | 9篇 |
1991年 | 8篇 |
1990年 | 7篇 |
1989年 | 5篇 |
1985年 | 47篇 |
1984年 | 60篇 |
1983年 | 45篇 |
1982年 | 42篇 |
1981年 | 39篇 |
1980年 | 11篇 |
1979年 | 25篇 |
1978年 | 36篇 |
1977年 | 21篇 |
1976年 | 13篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Although Affirmative Action policies have been enforced in many countries, their consequences are highly understudied, especially in the context of developing economies. Section 12(1)(c) of the Right to Education (RTE) Act enforced in 2009 is the first attempt to introduce affirmative action in primary schools in India. The act requires all private schools to reserve at least twenty five percent seats for children from economically weaker sections. To understand the effect of the act on i) social integration and ii) academic outcomes, we asked 1500 children (grades one to three) from four schools to answer friendship surveys and short tests in Mathematics and English. The schools in our sample vary considerably in constitution and were intentionally chosen to understand the impact of the act in different school settings. The friendship surveys show strong homophily i.e. non-RTE students cite other non-RTE students as friends, while RTE students chose to be friends primarily with other RTE students. Trends in test scores reveal that students admitted under the RTE quota score significantly lower than non-RTE students. However, RTE students who have a higher share of non-RTE friends have better test scores, suggesting that affirmative action may have a positive influence on learning outcomes for RTE children. Further we note that commitment from the school authorities and systematic monitoring and evaluation of the implementation of the act will go a long way in bringing out some of the benefits that this act was designed to achieve. Our findings have important policy implications with respect to ensuring proper implementation of the Section12(1)(c) of the RTE act in schools across the country. 相似文献
2.
《反兴奋剂运动员权利规则》是由世界反兴奋剂机构下属的运动员委员会制定,执行委员会批准通过的首个明确规定运动员在反兴奋剂活动中权利的文件。作为运动员参与反兴奋剂活动的基础,该文件的制定与修订争议不断,多集中于文件名称、法律地位及其内容中不具有强制执行力的部分。在体育组织的干预下,起草者修改了文件的名称并澄清“这不是一份法律文件”,使该文件的意义与价值存疑。建议在日后的修订中慎重考虑文件名称的匹配性,在厘清该文件与《世界反兴奋剂条例》及国际标准关系的基础上,赋予其法律效力或给予象征性法律规则的地位,完善对受侵犯权利救济的指引,加快建立申诉处理机制。 相似文献
3.
[目的/意义]随着知识服务平台的发展,如何通过评估改善知识服务平台的功能和设计以更好地服务于用户成为重要的问题。本文旨在探讨知识服务平台的评估要素和评估标准,为知识服务平台的评估实践提供理论指导。[方法/过程]从信息检索系统评估出发,回顾和梳理信息检索系统评估、数字图书馆评估的相关研究和理论模型、数字图书馆的评估要素和标准。[结果/结论]基于总结和归纳以往信息服务类系统的评估要素,结合知识服务平台的特征,阐述知识服务平台评估的要素和评估标准。 相似文献
4.
针对社会体育指导与管理专业学生就业渠道不畅、市场前景萎缩的现状,通过构建校企(地)联合培养的社会体育指导与管理专业人才培养模式,打造残疾人运动与康复服务的专业小方向,重新构建专业人才培养目标定位、以市场为导向的课程体系和结合人才培养对接的实习、实训课程体系,为推动社会体育指导与管理专业培养模式和方向的转型与发展提供重要理论指导和借鉴。 相似文献
5.
AbstractThe Program for Cooperative Cataloging (PCC) has formal relationships with the Library of Congress (LC), Share-VDE, and Linked Data for Production Phase 2 (LD4P2) for work on Bibliographic Framework (BIBFRAME), and PCC institutions have been very active in the exploration of MARC to BIBFRAME conversion processes. This article will review the involvement of PCC in the development of BIBFRAME and examine the work of LC, Share-VDE, and LD4P2 on MARC to BIBFRAME conversion. It will conclude with a discussion of areas for further exploration by the PCC leading up to the creation of PCC conversion specifications and PCC BIBFRAME data. 相似文献
6.
《Sport Management Review》2019,22(1):142-152
To reach and include socially vulnerable people through sport, it is important to create partnerships between sports organisations and public health organisations (i.e., sport-for-health partnerships). Working in sport-for-health partnerships is challenging, however, and little is known about how to manage such partnerships. To explore possible predictors of successful sport-for-health partnership, the authors administered a questionnaire among 86 participants in Dutch sport-for-health partnerships. The questionnaire included measures pertaining to three indicators of successful inter-sectoral partnership (i.e., partnership synergy, partnership sustainability, and community outcomes) and nine partnership elements that may predict its success. Multivariate results suggest that (a) partnership synergy may be best predicted by communication structure and building on the partnership participants’ capacities, (b) community partnership outcomes may be best predicted by partnership visibility and task management, and (c) partnership sustainability may be best predicted by partnership visibility. Hence, the authors would recommend actors in sport-for-health partnerships to pay particular attention to communication structure, building on capacities, visibility, and task management. 相似文献
7.
采用文献法、测试法、数理统计等方法,以武汉市十三个行政区内528名以太极拳为主要体育健身方式的老年人为样本,以马步蹲起、弓箭步蹲起、肘撑侧桥、肘撑侧桥举腿等与日常生活活动相关联的四个基础动作为测试内容。研究表明,受试人群普遍存在下肢与躯干的功能性力量不足、左右侧肌肉链力量不均衡的问题。虽然样本人群经常进行以太极拳为主要形式的体育锻炼,但在锻炼过程中侧重于套路技能的演练,对功能性力量训练的认识不足及缺乏相应的训练方法,存在科学性盲区,需要引起重视。 相似文献
8.
Kai Hu Qing Luo Kunlun Qi Siluo Yang Jin Mao Xiaokang Fu Jie Zheng Huayi Wu Ya Guo Qibing Zhu 《Information processing & management》2019,56(4):1185-1203
Topic evolution has been described by many approaches from a macro level to a detail level, by extracting topic dynamics from text in literature and other media types. However, why the evolution happens is less studied. In this paper, we focus on whether and how the keyword semantics can invoke or affect the topic evolution. We assume that the semantic relatedness among the keywords can affect topic popularity during literature surveying and citing process, thus invoking evolution. However, the assumption is needed to be confirmed in an approach that fully considers the semantic interactions among topics. Traditional topic evolution analyses in scientometric domains cannot provide such support because of using limited semantic meanings. To address this problem, we apply the Google Word2Vec, a deep learning language model, to enhance the keywords with more complete semantic information. We further develop the semantic space as an urban geographic space. We analyze the topic evolution geographically using the measures of spatial autocorrelation, as if keywords are the changing lands in an evolving city. The keyword citations (keyword citation counts one when the paper containing this keyword obtains a citation) are used as an indicator of keyword popularity. Using the bibliographical datasets of the geographical natural hazard field, experimental results demonstrate that in some local areas, the popularity of keywords is affecting that of the surrounding keywords. However, there are no significant impacts on the evolution of all keywords. The spatial autocorrelation analysis identifies the interaction patterns (including High-High leading, High-Low suppressing) among the keywords in local areas. This approach can be regarded as an analyzing framework borrowed from geospatial modeling. Moreover, the prediction results in local areas are demonstrated to be more accurate if considering the spatial autocorrelations. 相似文献
9.
AbstractThis opening article examines the relationship between community sport and social inclusion in research and practice. We discuss the notion of community sport, its multifarious meanings and diverse applications in different parts of the world. We further explore the conceptual and practical links between community sport and different conceptions of social inclusion. In doing so, the article draws together key themes, issues and debates addressed in the collection of articles in this special issue. We conclude by formulating implications and directions for future research and practice. 相似文献
10.
《Information processing & management》2023,60(2):103242
Among existing knowledge graph based question answering (KGQA) methods, relation supervision methods require labeled intermediate relations for stepwise reasoning. To avoid this enormous cost of labeling on large-scale knowledge graphs, weak supervision methods, which use only the answer entity to evaluate rewards as supervision, have been introduced. However, lacking intermediate supervision raises the issue of sparse rewards, which may result in two types of incorrect reasoning path: (1) incorrectly reasoned relations, even when the final answer entity may be correct; (2) correctly reasoned relations in a wrong order, which leads to an incorrect answer entity. To address these issues, this paper considers the multi-hop KGQA task as a Markov decision process, and proposes a model based on Reward Integration and Policy Evaluation (RIPE). In this model, an integrated reward function is designed to evaluate the reasoning process by leveraging both terminal and instant rewards. The intermediate supervision for each single reasoning hop is constructed with regard to both the fitness of the taken action and the evaluation of the unreasoned information remained in the updated question embeddings. In addition, to lead the agent to the answer entity along the correct reasoning path, an evaluation network is designed to evaluate the taken action in each hop. Extensive ablation studies and comparative experiments are conducted on four KGQA benchmark datasets. The results demonstrate that the proposed model outperforms the state-of-the-art approaches in terms of answering accuracy. 相似文献