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   248篇
  免费   6篇
  国内免费   11篇
教育   132篇
科学研究   41篇
体育   54篇
综合类   7篇
信息传播   31篇
  2023年   1篇
  2020年   1篇
  2018年   3篇
  2015年   1篇
  2014年   3篇
  2013年   11篇
  2012年   7篇
  2011年   32篇
  2010年   8篇
  2009年   14篇
  2008年   9篇
  2007年   22篇
  2006年   8篇
  2005年   19篇
  2004年   39篇
  2003年   20篇
  2002年   28篇
  2001年   14篇
  2000年   7篇
  1999年   3篇
  1998年   1篇
  1997年   5篇
  1996年   4篇
  1993年   3篇
  1987年   1篇
  1979年   1篇
排序方式: 共有265条查询结果,搜索用时 15 毫秒
141.
本文就多校区之间的管理,探讨运用信息化管理模式.以校园网络为支撑,共享各个校区的教学、科研、医疗及管理资源,优化学校运作各个过程,提高工作质量和效率.  相似文献   
142.
综述论文的遴选及审编   总被引:1,自引:0,他引:1  
冯腊枝 《编辑学报》2001,13(4):198-199
从编者的视角分析综述论文的价值、遴选和审编特点,以探讨综述论文的审编要求。  相似文献   
143.
古腾堡项目(ProjectGutenberg)被普遍认定是最早出现的数字图书馆。1971年7月4日,创始人MichaelHart将美国《独立宣言》输入计算机,开启了古腾堡项目的第一步。40年后,在Mr.Hard的领导和无数志愿者的帮助下,该项目的免费电子书等目前已经超过47Y本,而其附属网站收集的电子书更是超过了1077本。古腾堡项目作为最早的数字图书馆在数字图书馆发展史中扮演了十分重要的角色。文章对该项目的历史背景、信息资源组织、服务和技术特点等进行客观的介绍和评价。  相似文献   
144.
稠油油藏水驱采收率低,因其原油黏度高,不适合转化学驱,但转热采可大幅提高采收率。林樊家油田林东馆三段地质条件复杂,地层敏感性强,供液差,产能低,油稠,出砂严重,多年来采用了各种工艺措施,均未取得好的水驱开采效果。在分析低效水驱原因的基础上,论证了水驱转蒸汽热采可行性。开发实践表明,低效水驱稠油油藏通过转热采可大幅提高采收率,同时研究成果对同类油藏的开发具有重要指导意义。  相似文献   
145.
ABSTRACT:  Commercial, nonthermal processing of food, such as high hydrostatic-pressure processing (HPP), has increased. The safety and quality of foods produced by HPP has not been well communicated to the public. An online, nationwide consumer survey was implemented to assess awareness of alternative food processing technologies, consumer food safety attitudes and knowledge, and willingness to pay (WTP) for HPP products. The consumer survey was administered by Zoomerang™, an online survey clearinghouse. The survey was completed by 1204 adults. Frequencies and crosstabs were calculated on Zoomerang and SPSS used for one-way ANOVA and chi-square analyses. The survey assessed knowledge of HPP, attitudes about new food processing techniques, WTP for HPP foods and demographics. Overall, many demographic characteristics reflected U.S. census population. While traditional methods, that is, canning, freezing, and microwaving were all well recognized by over 80% of respondents, only 8% recognized HPP. Trends indicated an increase in age, education, and income reflected greater food safety knowledge. Regardless of demographics, no survey respondent exhibited knowledge mastery (80%). Given an explanation of HPP and its benefits, 39% of respondents indicated they would be WTP an additional cost, with higher income and education having the most impact. Majority of respondents indicated a WTP of $0.25 to $0.50 regardless of the value of the food product. More respondents were WTP slightly more for a more expensive product. New technologies often encounter a stumbling block in consumer acceptance and processing costs. A consumer's WTP, once they were informed, could encourage industry to look favorably on this technology.  相似文献   
146.
Objective: The Personal Attitude Scale (PAS; Hooley, 2000) is a method that is under development for identifying individuals high in Expressed Emotion based on personality traits of inflexibility, intolerance, and norm-forming. In the current study, the goal was to measure the association between this maternal attitudinal inflexibility, early hostile or disrupted mother-infant interactions, and hostile-aggressive behavior problems in the child.MethodsIn a prospective longitudinal study of 76 low-income mothers and their infants, it was predicted that maternal PAS scores, assessed at child age 20, would be related to difficulties in early observed mother-infant interaction and to hostile-aggressive behavioral difficulties in the child.ResultsResults indicated that maternal difficulties in interacting with the infant in the laboratory were associated with maternal PAS scores assessed 20 years later. Hostile-aggressive behavior problems in the child at age five were also predictive of PAS scores of mothers. However, contrary to prediction, these behavior problems did not mediate the association between mother-infant interaction difficulties and maternal PAS scores, indicating that the child's hostile-aggressive behavior problems did not produce the link between quality of early interaction and later maternal attitudinal inflexibility.ConclusionsThe current results validate the PAS against observable mother-child interactions and child hostile-aggressive behavior problems and indicate the importance of future work investigating the maternal attitudes that are associated with, and may potentially precede, parent-infant interactive difficulties.Practice implicationsThese findings regarding the inflexible attitudes of mothers whose interactions with their infants are also disrupted have important clinical implications. First, once the stability of the PAS has been established, this measure may offer a valuable screening tool for the prenatal identification of parents at risk for difficult interactions with their children. Second, it suggests routes for more cognitive interventions around helping less flexible parents shift perspectives to better take account of their child's outlooks and needs.  相似文献   
147.
前沿科学重点研究计划始于2016年,是中国科学院前沿科学与教育局为落实全国创新大会精神,试行部署的一项新的科研管理改革举措。该计划以"夯实基础,探索未知,谋求引领"为出发点,稳定支持一批久经证实的"立志报国、勤奋努力、积极向上"的"院士和顶尖科学家""中年拔尖科学家"和"青年拔尖科学家"开展研究的项目,谋求冲击国际一流甚至国际顶尖水平的基础科学问题,为率先实现科学技术跨越发展作出贡献。该计划项目布局整体上符合中国科学院人才现状和未来发展趋势,也是中国科学院在"放管服"方面的创新举措。该计划希望充分发挥科学家的主观能动性和创造性,通过稳定支持营造宽松的科研环境,使科学家们"坐得住冷板凳,敢啃硬骨头""十年磨一剑",面向国际科技前沿,力争在重要科学问题的新理论、新方向上取得突破,产出引领性的重大原创成果突破。同时,也希望通过该计划资助和管理方式的创新,为我国未来在基础科学领域的管理方式和资助方式改革提供有益借鉴。  相似文献   
148.
依据世界足球运动的发展趋势 ,认为提高中国足球的运动水平应从青少年抓起。培养青少年足球运动员需从抓基本技术、战术意识、身体素质和思想与比赛作风等方面。  相似文献   
149.
毛泽东与他的"豪杰"体育   总被引:4,自引:0,他引:4  
详尽论述了毛泽东“豪杰”体育及其来源,指出杨昌济的“言传身教”、陈独秀的“兽性主义”对其的影响,并阐述了“豪杰”体育的哲学意义。  相似文献   
150.
数字图书馆可持续发展模式的再思考   总被引:3,自引:0,他引:3  
在分别对数字图书馆的集中模式、分布模式和复合模式进行分析研究的基础上,指出新的数字图书馆的基础结构(in-frastructure)及相应的服务模式需要在集中本地资源、服务的同时,吸收全国乃至全球范围内可获得的相应资源,故在上述方面占有优势的复合模式将成为数字图书馆可持续发展的未来模式。  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