跳频多址系统盲空时干扰消除算法研究     

刘传清 《襄樊学院学报》2007,28(11):44-47

提出了适合无中心控制的对等网络的盲空时自适应干扰消除算法．本算法利用检测信号功率恒定的特点，采用了两个滤波器组，当其中一个工作时，另一个开始调整权系数，从而提高了收敛速度，避免了跳频频率变化带来的波束估计误差．仿真结果表明，提出的盲自适应算法可以明显提高输出信号SINR增益．  相似文献   

国内学业不良研究的回顾与反思   总被引：7，自引：0，他引：7  

曾守锤  吴华清 《山东教育学院学报》2003,18(6):14-16

对学业不良研究献的统计和分析可以促进该领域的健康发展。章从杂志、年份、研究的内容、对象、方法和作的单位分布等方面，对1990～2002年间学业不良的研究献进行了统计分析。结果发现，与十几年前相比，国内学业不良的心理学研究已取得了较大的进步，但同时也存在一些不足之处。  相似文献   

大规模应急物资运输问题的研究现状与发展方向   总被引：2，自引：0，他引：2  

缪成  许维胜  吴启迪 《新疆职业大学学报》2007,15(1):35-38

本文介绍了应急物资运输问题的概念、特点，分析了应急物流中救援物资运输与商业物资运输的区别及联系。然后分类综述了国内外主要学者关于应急物资运输领域的研究模型及结论，重点分析了应急物资运输问题的研究现状、模型建立的限制条件及其优缺点。最后展望了其研究前景，指出遗传算法、禁忌搜索算法等亚启发式算法对于解决救援物资运输问题具有重要意义。  相似文献   

Mediating effects of teacher and peer relationships between parental abuse/neglect and emotional/behavioral problems     

《Child abuse & neglect》2016

The current study examined the mediating effects of the teacher and peer relationships between parental abuse/neglect and a child’s emotional/behavioral problems. A total of 2070 student surveys from the panel of the Korean Child Youth Panel Study (KCYPS) were analyzed by path analysis. The key findings of this study are outlined below. Firstly, parental physical and emotional abuse and neglect had significant effects on children’s problems. The direct effect of parental abuse on emotional/behavioral problems was higher than the direct effect of parental neglect on emotional/behavioral problems. Secondly, the teacher relationship partially mediated the effects of the parental abuse/neglect on emotional/behavioral problems. Thirdly, the peer relationship also partially mediated the effects of parental abuse/neglect on children’s emotional/behavioral problems. The indirect effect of parental neglect via teacher relationships and peer relationships was stronger than the indirect effect of parental abuse. This study is significant in that it identified that parental abuse/neglect was mediated by the teacher and peer relationship, thereby suggesting an implication for effective intervention with children who have suffered abuse and neglect. In terms of the teacher and peer relationship, understanding the influence of parental abuse and neglect on children’s problems was discussed, and the limitations and recommendations for future study were suggested.  相似文献   

Learning design and learning analytics in mobile and ubiquitous learning: A systematic review     

Gerti Pishtari  María J. Rodríguez-Triana  Edna M. Sarmiento-Márquez  Mar Pérez-Sanagustín  Adolfo Ruiz-Calleja  Patricia Santos  Luis P. Prieto  Sergio Serrano-Iglesias  Terje Väljataga 《British journal of educational technology : journal of the Council for Educational Technology》2020,51(4):1078-1100

Mobile and Ubiquitous Learning (m/u-learning) are finding an increasing adoption in education. They are often distinguished by hybrid learning environments that encompass elements of formal and informal learning, in activities that happen in distributed settings (indoors and outdoors), across physical and virtual spaces. Despite their purported benefits, these environments imply additional complexity in the design, monitoring and evaluation of learning activities. The research literature on learning design (LD) and learning analytics (LA) has started to deal with these issues. This paper presents a systematic literature review of LD and LA, in m/u-learning. Apart from providing an overview of the current research in the field, this review elicits elements of common ground between both communities, as shown by the similar learning contexts and complementary research contributions, and based on the research gaps, proposes to: address m/u-learning beyond higher education settings, reinforce the connection between physical and virtual learning spaces, and more systematically align LD and LA processes.  相似文献   

2011年我国文献学研究进展     

王余光  郑丽芬 《国家图书馆学刊》2012,21(3):9-16

以2011年公开发表的文献学论文和主要著作为基础,梳理本年度文献学研究的主要内容,并从文献学理论研究、文献学专题研究、专科文献学研究和文献学家研究等方面进行了论述和总结,以期为研究者了解2011年度文献学研究进展提供参考。  相似文献   

2011年我国情报学研究进展     

王益明  崔莎  王婧文 《国家图书馆学刊》2012,21(3):17-24

概述了2011年度我国情报学在理论与方法、信息检索、情报分析与研究、信息服务与用户研究、信息计量学等五个重要领域所取得的研究进展。  相似文献   

出版集团全媒体研究综述     

朱静雯  刘畅 《出版科学》2012,20(3):30-33

现代网络信息技术的迅速发展,全媒体环境悄然形成,并对我国出版集团的发展产生巨大影响。围绕出版集团全媒体的发展,学界对全媒体环境下出版集团的变革、发展模式与出版集团全媒体管理进行研究,取得一系列成果。通过对全媒体环境下出版集团的理论研究分析,能够找出存在的问题,为出版集团全媒体发展提供更好的指导和建议。  相似文献   

论中国古典舞的构成模式     

孙力 《大连大学学报》2012,(4):68-70

中国古典舞在当代的建构是在新中国成立之初,与其他艺术门类一样,中国古典舞也经历了艰难的历程和各种坎坷的发展道路,回顾其发展之路,中国古典舞经历了融入戏曲、引进"芭蕾"训练方法、融会贯通三个阶段。文章通过对中国古典舞发展历程的梳理,剖析了中国古典舞的构成模式,认为其实质是"取吾精髓、师夷之技、融会贯通"的构成模式。  相似文献   

Sensemaking and Relational Consequences of Peer Co-worker Deception     

《Communication monographs》2012,79(1):115-137

This exploratory study examined sensemaking of peer co-worker deception from the perception of the deceived. A total of 58 narrative accounts of deception were collected via face-to-face interviews with 23 employed adults. Analysis revealed four primary narratives of co-worker deception: corrupt system narratives, “cover your ass” (CYA) narratives, personal gain narratives, and personality trait narratives. Perceived motives and consequences were primary considerations in the sensemaking process and employees reported changing their communication patterns to avoid deceptive co-workers or hold them more accountable for their actions. The theoretical and practical implications of these results are discussed and suggestions for future research are posited.  相似文献