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   241篇
  免费   2篇
  国内免费   1篇
教育   90篇
科学研究   45篇
各国文化   2篇
体育   2篇
综合类   28篇
信息传播   77篇
  2020年   4篇
  2019年   4篇
  2018年   3篇
  2016年   3篇
  2015年   1篇
  2014年   3篇
  2013年   26篇
  2012年   10篇
  2011年   72篇
  2010年   10篇
  2009年   12篇
  2008年   5篇
  2007年   9篇
  2006年   29篇
  2005年   3篇
  2004年   10篇
  2002年   1篇
  2001年   4篇
  2000年   1篇
  1999年   27篇
  1998年   2篇
  1996年   1篇
  1990年   1篇
  1988年   1篇
  1979年   2篇
排序方式: 共有244条查询结果,搜索用时 15 毫秒
51.
This paper evaluates the relevance of innovation strategy to various categories of Chinese firms and investigates its relationship with innovation performance during the economic transition of the 1990s. Data from 1244 Chinese firms in Beijing are used to ascertain the relative importance of different innovation objectives, along with the innovation strategies adopted by manufacturing firms. Results show that innovation activities were confined to the domestic sphere and mainly directed at quality improvement. Chinese manufacturing firms which obtained support from the government through the high-tech firm accreditation system generally perform better. They had already started moving away from a reliance on imported technology and equipment, and using indigenous R&D efforts to innovate for the coming market economy.  相似文献   
52.
The recent development of personal digital collections systems on museum websites has prompted researchers to examine the motivations and expectations of museum visitors as they interact with those systems. Results from an online survey completed by visitors to six different museum websites show that users of personal digital collections systems are primarily motivated by a desire to create simple collections of objects and images, and are less influenced by the more complicated features museums have implemented to encourage user participation. The significance of these findings is explored through a discussion of user expectations and motivations with respect to creating personal digital collections, and an attempt is made to reconcile some of the disparities between the perceptions of survey respondents and the experiences of museum professionals developing and implementing personal digital collections systems.  相似文献   
53.
美丽与爱情     
Whenever Beauty looks,Love is also there;Whenever Beauty shows a rosy cheek,Love lights Her fire from that flame.When Beauty dwells in the dark folds of night,  相似文献   
54.
55.
56.
57.
58.
Relevance judgments occur within an information search process, where time, context and situation can impact the judgments. The determination of relevance is dependent on a number of factors and variables which include the criteria used to determine relevance. The relevance judgment process and the criteria used to make those judgments are manifestations of the cognitive changes which occur during the information search process.Understanding why these relevance criteria choices are made, and how they vary over the information search process can provide important information about the dynamic relevance judgment process. This information can be used to guide the development of more adaptive information retrieval systems which respond to the cognitive changes of users during the information search process.The research data analyzed here was collected in two separate studies which examined a subject’s relevance judgment over an information search process. Statistical analysis was used to examine these results and determine if there were relationships between criteria selections, relevance judgments, and the subject’s progression through the information search process. Findings confirm and extend findings of previous studies, providing strong statistical evidence of an association between the information search process and the choices of relevance criteria by users, and identifying specific changes in the user preferences for specific criteria over the course of the information search process.  相似文献   
59.
16至20世纪,欧洲未婚母亲和非婚生子女的法律地位发生了巨大的变化。最关键的变革发生在19世纪,这一是由于婚外生育的剧增,二是由于人们对贫困、财产、个人权利、国家职责的新思考。许多欧洲国家取消了"认父"程序:从此,只有主动承认亲子关系的父亲才对孩子负有义务,于是这一负担完全落在了女性身上。20世纪初,受女权运动的冲击,不少国家改革了相关立法,斯堪的纳维亚国家走得最远。另一些国家则到20世纪60年代才取消了对未婚母亲及其子女的歧视。在欧洲的宏观背景下考察瑞士的辩论,并特别关注两性间的社会关系。同时,也对瑞士四个村庄司法户籍档案进行案例分析,体味其中的个体境遇,量化法律改革的社会影响。  相似文献   
60.
In the United States, a number of federal laws establish requirements that electronic government (e-government) information and services be accessible to individuals with disabilities. These laws affect e-government Web sites at the federal, state, and local levels. To this point, research about the accessibility of e-government Web sites has tended to focus on compliance with Section 508 of the Rehabilitation Act. Though Section 508 has the most specific guidelines regarding Web site accessibility, it is hardly the only law establishing accessibility requirements for e-government Web sites, and Section 508 does not apply to many sites that may be required to be accessible by other laws. Until assessment of the accessibility of e-government Web sites accounts for all of the relevant laws, the understanding of levels of accessibility and compliance will be incomplete. This article examines the entire spectrum of federal laws that create legal requirements for accessible e-government Web sites, analyzing the accessibility requirements that the laws establish and the ways in which each of the laws applies to an e-government Web site. This article also suggests research areas that should be included in future assessments to address the entire range of laws related to the accessibility of e-government Web sites. The issues raised in this article have significant relevance to the design and development of e-government, to the assessment of e-government information and services, and to the inclusion in e-government of the 54 million individuals in the United States with disabilities.  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