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   843篇
  免费   7篇
  国内免费   23篇
教育   564篇
科学研究   150篇
体育   49篇
综合类   52篇
信息传播   58篇
  2023年   4篇
  2022年   5篇
  2021年   12篇
  2020年   6篇
  2019年   6篇
  2018年   2篇
  2017年   9篇
  2016年   9篇
  2015年   13篇
  2014年   44篇
  2013年   37篇
  2012年   40篇
  2011年   64篇
  2010年   40篇
  2009年   45篇
  2008年   44篇
  2007年   79篇
  2006年   87篇
  2005年   66篇
  2004年   60篇
  2003年   56篇
  2002年   40篇
  2001年   42篇
  2000年   18篇
  1999年   16篇
  1998年   10篇
  1997年   2篇
  1996年   2篇
  1995年   3篇
  1994年   2篇
  1993年   4篇
  1992年   3篇
  1991年   1篇
  1989年   2篇
排序方式: 共有873条查询结果,搜索用时 31 毫秒
21.
陶瓷粉体分散的稳定机制及Sialon粉体分散的研究   总被引:3,自引:0,他引:3  
介绍和讨论了陶瓷粉体分散的稳定机制及如何选择分散剂,并研究了分散剂柠檬酸钠和PH值对Sialon粉体分散的影响。  相似文献   
22.
通过体外实验和断奶仔猪饲养试验研究了包被复合酸化剂(简称复合酸化剂)的抑菌效果及其对断奶仔猪抗腹泻效果和生产性能的影响.体外试验结果表明,采用抑菌圈法对不同浓度的复合酸化剂进行比较时,以0.2%的浓度显示出较强的抑菌效果,对大肠杆菌、沙门氏菌和乳酸杆菌的抑菌圈直径分别达到了15.0、16.8和13.0 mm.仔猪饲养实验结果表明:与不合酸化剂的对照组或有机酸化剂组相比,在基础日粮中添加了0.2%的包被复合酸化剂可以进一步提高仔猪的生长速度及饲料转化率,同时可以降低仔猪的腹泻率.  相似文献   
23.
固化土强度特性试验研究   总被引:4,自引:0,他引:4  
董邑宁  张青娥 《科技通报》2003,19(6):477-480
应用不同固化剂对加固软土的作用进行了试验,分析和讨论了固l和固2加固土在不同掺入比和龄期时强度的变化规律及应力一应变特性.从整体加固效果分析看出,固2加固土效果优于固l加固土,两种固化土的最佳掺入比在12%~15%,可在软土地基处理和实际工程中应用.  相似文献   
24.
试论面向数字图书馆建设的版权制度调整   总被引:1,自引:0,他引:1  
秦珂 《情报科学》2003,21(4):360-362,384
文章从有利于数字图书馆建设和功能开发的解放对版权制度的完善提出了立法建议。  相似文献   
25.
Traditional approaches to computer ethics regard computers as tools, andfocus, therefore, on the ethics of their use. Alternatively, computer ethicsmight instead be understood as a study of the ethics of computationalagents, exploring, for example, the different characteristics and behaviorsthat might benefit such an agent in accomplishing its goals. In this paper,I identify a list of characteristics of computational agents that facilitatetheir pursuit of their end, and claim that these characteristics can beunderstood as virtues within a framework of virtue ethics. This frameworkincludes four broad categories – agentive, social, environmental, and moral– each of which can be understood as a spectrum of virtues rangingbetween two extreme subcategories. Although the use of a virtue frameworkis metaphorical rather than literal, I argue that by providing a frameworkfor identifying and critiquing assumptions about what a `good' computer is,a study of android arete provides focus and direction to the developmentof future computational agents.  相似文献   
26.
基于多智能主体协作的知识检索   总被引:1,自引:0,他引:1  
王娜 《现代情报》2007,27(12):152-155
文章介绍了知识检索、主体及智能主体的涵叉,阐述了知识检索中智能主体的协作策略,并分析了基于多智能主体协作的知识检索模型与方法。  相似文献   
27.
论信息代理与智能代理   总被引:7,自引:0,他引:7  
王玉 《情报科学》2001,19(6):603-604,641
文章主要介绍了信息代理与智能代理同样是信息中介或代理的特点,分析了他们之间相同与不同,构想了两者发展的前景。  相似文献   
28.
Census information of some form has been collected in Canada since the 1611 census of New France. Aboriginal people, identified or not, have been included in these enumerations. The collection of this information has had a profound impact on Aboriginal people and has been an element that has shaped their relationship with the dominant society. In response, Canadian Aboriginal people have often resisted and refused to co-operate with census takers and their masters. This article is an examination of this phenomenon focused on the censuses conducted in the post-Confederation period to the present. A census is made to collect information on populations and individuals that can then be used to configure and shape social and political relations between those being enumerated and the creators of the census. However, the human objects of the census are not just passive integers and they have resisted its creation in a number of ways, including being “missing” when the census is taken, refusing to answer the questions posed by enumerators or even driving them off Aboriginal territory. A census identifies elements of the social order and attempts to set them in their “proper” place and those who do not wish to be part of that order may refuse to take part. Archivists and historians must understand that the knowledge gained in a census is bound with the conditions of own creation. This has been noted by contemporary Aboriginal researchers who often state that the archival record of their people often distorts history and reflects the ideas and superficial observations of their Euro-Canadian creators. Changes to the Census of Canada since 1981, have increased the participation rate and therefore changed the nature of the record.
Brian Edward HubnerEmail:

Brian Edward Hubner   is currently Acquisition and Access Archivist at the University of Manitoba Archives & Special Collections. He was previously employed at the Archives of Manitoba, in Government Records; Queen’s University Archives, Kingston; and at the National Archives of Canada, Ottawa. He has a Master of Arts (History, in Archival Studies) from the University of Manitoba, and a Master of Arts (History), from the University of Saskatchewan. The 2nd edition of Brian’s co-authored book on the history of the Cypress Hills of Saskatchewan and Alberta is being published in 2007. He has published articles and delivered conference papers on Canadian Aboriginal peoples including “Horse Stealing and the Borderline: The N.W.M.P. and the Control of Indian Movement, 1874-1900.” His current research interest focuses on relationship between Canada’s Aboriginal Peoples and Canadian archives. Brian is married and has two children.  相似文献   
29.
文化公司以其灵活的经营方式,适应了出版文化市场发展的需要。由于相关法律法规规定,图书出版只能由出版社独立行使,其他主体没有出版资格,使文化公司在出版过程中的法律地位处于尴尬之境。文章通过许可使用及委托———代理的关系等法理分析,明确文化公司法律地位,肯定其参与出版的意义和作用。  相似文献   
30.
对高校基建工程实施代建制管理进行可行性分析,建立高校基建工程代建制管理模式,并说明保证该管理模式顺利实施须明确的关键问题以及可能带来的风险与解决对策,以充分发挥代建制在高校建设工程项目管理中的应用。  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