一种有效缓解数据稀疏问题的协同过滤推荐算法     

程芳  沈红岩  赵艳 《现代情报》2016,36(3):76-79

传统协同过滤推荐算法依据共同评分项目计算用户相似度, 进而产生推荐项目。然而, 随着用户和商品数量的不断增加, 用户共同评分的项目会越来越少, 甚至没有, 因此传统协同过滤推荐算法对用户之间相似度的衡量将会越来越不准确, 从而影响推荐系统的性能。针对这一问题, 本文对用户相似度的计算方法进行了改进, 提出直接相似度和间接相似度的概念, 同时引入关键人物权重, 进一步提高推荐系统的准确性。  相似文献   

Multimedia augmented m-learning: Issues,trends and open challenges     

《International Journal of Information Management》2016,36(5):784-792

The advancement in mobile technology and the introduction of cloud computing systems enable the use of educational materials on mobile devices for a location- and time-agnostic learning process. These educational materials are delivered in the form of data and compute-intensive multimedia-enabled learning objects. Given these constraints, the desired objective of mobile learning (m-learning) may not be achieved. Accordingly, a number of m-learning systems are being developed by the industry and academia to transform society into a pervasive educational institute. However, no guideline on the technical issues concerning the m-learning environment is available. In this study, we present a taxonomy of such technical issues that can impede the life cycle of multimedia-enabled m-learning applications. The taxonomy is devised based on the issues related to mobile device heterogeneity, network performance, content heterogeneity, content delivery, and user expectation. These issues are discussed, along with their causes and measures, to achieve solutions. Furthermore, we identify several trending areas through which the adaptability and acceptability of multimedia-enabled m-learning platforms can be increased. Finally, we discuss open challenges, such as low complexity encoding, data dependency, measurement and modeling, interoperability, and security as future research directions.  相似文献   

支持手机检索的技术方案   总被引：4，自引：0，他引：4  

黄风华 《情报科学》2003,21(12):1311-1313

随着手机的日益普及，人们越来越希望能利用手机从Internet获取各种信息，本文介绍了满足这一需要的两种技术方案。  相似文献   

Predicting smartphone brand loyalty: Consumer value and consumer-brand identification perspectives     

《International Journal of Information Management》2016,36(3):245-257

With the growth and competition of the smartphone industry, developing a better understanding of what drives consumers' loyalty to smartphone brands has become an important issue for academics and practitioners. This study hypothesizes four determinants of smartphone brand loyalty based on the perspectives of consumer value and consumer-brand identification. Furthermore, this study also explores the moderating effects of age and gender differences on the determination process of smartphone brand loyalty. Data collected from 157 respondents was tested against the research model using a partial least squares (PLS) approach. The results indicate that functional value, emotional value, social value, and brand identification have a positive influence on smartphone brand loyalty. Of the two moderators, results show that age enhances the emotional value-brand loyalty and social value-brand loyalty linkages but weakens the brand identification-brand loyalty relationship. However, gender does not play a moderating role in the determination of smartphone brand loyalty. The results of this study provide several important theoretical and practical implications for smartphone brand management.  相似文献   

How system quality influences mobile BI use: The mediating role of engagement     

《International Journal of Information Management》2016,36(5):773-783

Despite the recognized value that mobile BI (m-BI) brings to firms, our understanding of the use of m-BI and its determinants are limited. In this study, we suggest that m-BI system quality characteristics may be among the factors that influence m-BI use. Yet, in the information systems (IS) literature there is mixed support for the relationship between system quality and system use at the individual level. Given there is research suggesting that engaged users are an indication of the technology’s success, we believe that ‘engagement’ may be the key to understanding the relationship discrepancy between system quality and use. To address this gap, we conducted a quantitative study of key informants who use m-BI, to understand what the key m-BI capabilities are and other success dimensions perceived as important by users. The results indicate that m-BI system quality attributes affect m-BI use indirectly through engagement, with this finding contributing to understanding of the complexity of IS use in mobile technologies.  相似文献   

手机颜色词的类型特征及语用功能     

王成晶 《毕节学院学报》2007,25(3):6-8

"极夜蓝"、"成功银、骑士灰"、神秘紫、"迷幻红"、等这些新出现的手机颜色词是一类值得研究但却没有引起足够关注的新词.从"四个世界"理论出发,有从物理世界、文化世界、心理世界产生的手机颜色词,它们都具有一些特殊的语用功能.  相似文献   

电子商务专业实践教学模式的比较分析与思考——以四所普通高校为例   总被引：1，自引：0，他引：1  

桂学文  蔡青 《实验技术与管理》2011,28(11)

西安交通大学等4所普通高校积极开展电子商务专业实践教学的建设与改革,并在发展中形成了各具特色的模式.立足于4所高校的实践教学现状和经验,进行细致的对比分析,有利于对电子商务专业实践教学的深入认识和长远思考.以人才培养目标为中心,正确处理知识、技能、素质三者的关系,合理利用课堂内外的教学方式与教学资源,结合电子商务产业发展开展实践教学,是电子商务专业实践教育改革的方向.  相似文献   

浅析电子商务环境下高职物流专业教学改革   总被引：1，自引：0，他引：1  

黄琳 《南昌教育学院学报》2011,(11):111-112

随着现代信息技术的发展,全球贸易活动日益受到新兴电子信息技术的影响。电子商务的推广和发展,加快了世界经济的一体化,也推动了物流业的快速发展,物流在整个电子商务活动中占有举足轻重的地位,这就对能适应电子商务环境的物流人才提出了迫切要求。本文对我国高职物流专业课程体系设计与电子商务物流人才培养思路进行探索,在阐述高职物流专业教学现状的基础上,分析其教学中面临的问题,并提出改革对策。  相似文献   

技术改造课程,技术改善学习——全国高校教育技术协作工作委员会第七届年会暨学术交流会（CETA7）综述     

王健  李晓庆  汪琼 《电大教学》2011,(6):24-30

信息技术的高速发展为高校教师提供了新的教学方式,学生的学习方式也因此而改变,在课程和学习被改变的同时,教育在无形中就发生了变化。全国高等学校教育技术协作工作委员会第七届年会暨学术交流会（CETA7）于10月13日至14日在辽宁大连举行,大会以＂技术改造课程、技术改善学习＂为主题,围绕视频公开课建设、资源共享课建设、教师教学能力提升、教育新技术、教师专业发展、网络教学平台的深度应用等主题展开,与会者进行了较为深入地交流与探索。  相似文献   

实践教学法在《电子商务概论》教学中的应用   总被引：1，自引：0，他引：1  

刘河伟  李隽波 《高教论坛》2011,(1):91-93

实践教学法是华德福教育的核心。1996年,联合国教科文组织将华德福教育郑重的推荐给全世界。目前,全球共有600多所华德福学校。华德福教育主要集中在幼儿园、小学和中学,在大学教育中运用的很少。本文探讨了在高校《电子商务概论》课程里,采用实践教学法与电商理论相结合,实验课为辅助的教学方法。在教学中,全部采用实践性作业,用开网店的形式进行期末考评,教学收效明显,学生创业热情高涨。通过这次教学实践,对于在高校电子商务教学中如何走出大学生自我创业的路子有借鉴意义。  相似文献