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   3160篇
  免费   69篇
  国内免费   36篇
教育   2100篇
科学研究   398篇
各国文化   45篇
体育   353篇
综合类   63篇
文化理论   30篇
信息传播   276篇
  2023年   11篇
  2022年   47篇
  2021年   73篇
  2020年   80篇
  2019年   119篇
  2018年   140篇
  2017年   149篇
  2016年   114篇
  2015年   105篇
  2014年   122篇
  2013年   349篇
  2012年   145篇
  2011年   131篇
  2010年   131篇
  2009年   106篇
  2008年   116篇
  2007年   158篇
  2006年   142篇
  2005年   97篇
  2004年   85篇
  2003年   136篇
  2002年   159篇
  2001年   146篇
  2000年   97篇
  1999年   40篇
  1998年   25篇
  1997年   23篇
  1996年   13篇
  1995年   20篇
  1994年   14篇
  1993年   19篇
  1992年   11篇
  1991年   11篇
  1990年   12篇
  1989年   6篇
  1988年   4篇
  1987年   9篇
  1986年   4篇
  1985年   12篇
  1984年   8篇
  1983年   6篇
  1982年   6篇
  1980年   5篇
  1978年   7篇
  1977年   4篇
  1974年   4篇
  1973年   5篇
  1967年   4篇
  1887年   3篇
  1865年   4篇
排序方式: 共有3265条查询结果,搜索用时 15 毫秒
221.
马德  马高强 《家教指南》2022,(1):137-142
120多年来,世界范围内敦煌研究取得了一定的成就,为今后的研究奠定了基础。在这个基础上,需要认识敦煌历史文化作为精神财富对人类社会进步发展的价值意义;需要转变传统观念,改进研究方法,开创新的研究局面,促进敦煌事业的发展,为新时代坚持中国特色社会主义建设提供精神支撑。  相似文献   
222.
This is part of a new series in this regular feature regarding trends in the provision of information by health science libraries. By sharing expertise and drawing together relevant trends the series intends to serve as a road map for both health science librarians and health informatics professionals. This article shows how a medical and biomedical research library changed practices, and reassessed user needs for the COVID‐19 emergency. Discusses changes to online education (and collaborative working) to provide user‐friendly services, researcher support tailored to need and re‐visioning library space. J.M.  相似文献   
223.
The tools used in learning processes are in a continuous state of flux. One of the most significant changes is the application of Information and Communications technologies (ICTs) to educational contexts. This provides new possible ways to carry out learning activities, new learning services, the possibility to use new kinds of contents and activities, etc. However, ICTs have not provided as many advantages as they were supposed to, so changes are necessary. In this context, a new set of tools, Web 2.0, offers a new way to understand the Web, in which the user is the centre. Further, users can cooperate in order to define contents. This concept is also applied in technology-mediated learning but there are important problems when one tries to integrate such tools and concepts with existing systems. This paper explores the integration of these tools in traditional learning environments, the various possibilities and their advantages and drawbacks. After that, an interoperability scenario is described and two experiences are presented to show how 2.0 tools can be integrated in learning activities, and its effect in educational process.  相似文献   
224.
This paper focuses on institutionally powered personal learning environments (iPLEs). The concept of the iPLE can be seen as a way universities can incorporate learner-centred approach into the architecture of their technology-enhanced learning environments. The aim of this paper is to pose that there are other ways to learn complementary to virtual learning environments, such as using distributed Web 2.0 tools from personal learning environments (PLEs). With that aim in mind, this paper presents an exploratory study with two different iPLE configurations, analyses how they modify the learning–teaching process, and reports their perceived usefulness from the students' point of view. These two case studies were carried out by a research group of educational technology from a Spanish university in graduate and postgraduate courses. As reported by other case studies, the results revealed that students use the environment basically in the academic context and this usage is conceived as another time and effort requiring task. This fact can be observed in the low level iPLEs customization. The overall conclusions we can extract are, on the one hand, that the new environment to integrate informal and formal learning should be flexible and adaptable to the student's needs and preferences and, on the other hand, that academic tools might someday become personal tools.  相似文献   
225.
针对我国首个居民使用页岩气镇——宜宾市珙县上罗镇,通过走访、问卷调查、咨询专家及现场考察方式,主要从市场、需求、价格、影响因素等方面进行调查;分析并提出对页岩气开采应减少水资源污染、提供能源补贴,鼓励使用新型能源并积极推进页岩气民营化的进度.  相似文献   
226.
227.
Since late 2020,China and the United States,the world's two largest economies,have embarked on regulatory reforms to boost the regulatory development of genetic...  相似文献   
228.
预应力锚杆(索)抗滑桩是出现于二十世纪八十年代的一种抗滑支挡结构,但其计算理论仍不完善,故根据目前抗滑桩计算中所存在的问题,对锚杆(索)抗滑桩的设计与计算方法加以改进。  相似文献   
229.
深基坑工程安全监测和信息化监控   总被引:8,自引:0,他引:8  
近年来随着深基坑工程数量的急剧增长,带来许多新的课题有待研究和解决.本文从基坑安全监测的角度对深基坑的监测项目、监测方法和研究现状进行阐述,并在此基础上对深基坑监测今后的研究方向进行展望,指出信息化施工以及建立完善的险情预警系统的重要性.  相似文献   
230.
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