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   1907篇
  免费   54篇
  国内免费   48篇
教育   1043篇
科学研究   292篇
各国文化   7篇
体育   237篇
综合类   152篇
文化理论   5篇
信息传播   273篇
  2023年   19篇
  2022年   10篇
  2021年   28篇
  2020年   55篇
  2019年   83篇
  2018年   50篇
  2017年   50篇
  2016年   54篇
  2015年   60篇
  2014年   103篇
  2013年   212篇
  2012年   126篇
  2011年   144篇
  2010年   79篇
  2009年   94篇
  2008年   100篇
  2007年   129篇
  2006年   131篇
  2005年   92篇
  2004年   94篇
  2003年   74篇
  2002年   53篇
  2001年   43篇
  2000年   43篇
  1999年   19篇
  1998年   7篇
  1997年   14篇
  1996年   14篇
  1995年   4篇
  1994年   6篇
  1993年   5篇
  1992年   6篇
  1991年   1篇
  1989年   3篇
  1985年   1篇
  1984年   2篇
  1977年   1篇
排序方式: 共有2009条查询结果,搜索用时 15 毫秒
21.
We present a variant of the Game of Pig to introduce the concepts of probability, simulation and expected value.  相似文献   
22.
Analysis of variance (ANOVA) is a test of mean differences, but the reference to variances in the name is often overlooked. Classroom activities are presented to illustrate how ANOVA works with emphasis on how to think critically about inferential reasoning.  相似文献   
23.
在统计课教学中,要设置基本技能标准,积极改进教学方法,强化实践教学环节,以此来增强学生基本技能,以实现高职学生的培养目标。  相似文献   
24.
25.
This session highlighted trends in continuing resource collections and collection management throughout the 30-year period from 1985 through 2015. Electronic resources became available in the 1990s and grew in prevalence from the 2000s through the present, changing the make-up of library collections and also how libraries measure collections and collection usage. Two librarians and two vendors shared their perspectives on these changes in collection development, describing how library collections now contain a combination of older formats and older ways of collecting data, and new, electronic content and automated ways of collecting and disseminating data about collections.  相似文献   
26.
Wenli Gao 《期刊图书馆员》2016,70(1-4):121-127
This article outlines a methodology to generate a list of local core journal titles by doing a citation analysis and details the process for retrieving and downloading data from Scopus. It analyzes correlations among citation count, journal rankings, and journal usage. The results of this study reveal significant correlations between journal rankings and journal usage. No correlation with citation count has been found. Limitations and implications for collection development and outreach are also discussed.  相似文献   
27.
Established in 2014, Usus (Latin for usage), supported by Counting Online Usage of NeTworked Electronic Resources (COUNTER), but editorially independent, is a community-run website designed to provide a space for librarians, consortia, publishers, aggregators, repository managers, and scholars to discuss all aspects of usage, including particular ways that use is measured. In this session, Usus Supervisory Board members provided an introduction to Usus, outlined the purpose of the community-run site, and discussed how librarians may utilize the site to submit ongoing and complex usage issues. In addition, the presenters engaged attendees in discussing specific e-resource usage issues they have encountered as well as report changes and additions in the recently released COUNTER Code of Practice 4.  相似文献   
28.
In this article, Bradley Wade Bishop sets forth the unspoken premise that public libraries that offer desired services to their constituents are going to succeed. This article has many specific examples of emergency and continuing services that small public libraries provide. It also suggests the need for extensive research on successful libraries which illustrate all sorts of rules about how to meet the future successfully.  相似文献   
29.
本介绍了图像去噪的原理,并对几种图像去噪方法进行了分析,提出了一种基于高阶统计量的图像去噪法,实验表明,这种方法具有较好的去噪效果。  相似文献   
30.
本文考虑了根据样本数据建立贝叶斯信念网络构造算法在电信CRM中的应用,并对电信10000个样本进行了挖掘、分析、评估.  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