UPnP媒体播放器的研究与实现

UPnP是数字家庭网络中的一个主流协议,它实现了零配置,不用再进行繁琐的网络配置,并为数字设备的接入、发现、服务描述等制订了一系列的规范。本文先介绍了UPnP架构;描述了UPnP媒体播放器设计的基本思想;并利用Intel公司提供的Device Builder生成的UPnP框架作为基础,通过在其上添加相应的控制功能与解码功能,实现了一个UPnP网络媒体播放器;介绍了各部分实现的具体细节,并对该播放器进行了测试与分析。最后,与其它方案进行比较,指出各方案存在的问题以及本方案对该问题的解决方法。     

长江云全媒体内容库技术架构设计与实现

在全国媒体融合进程进入高质量发展阶段,如何充分打通和共享平台数据、深入挖掘和开发利用数据价值,是提高融合生产水平的重点和难点。长江云全媒体内容库可提供以数据为核心、面向平台业务的、基于融合生产及全媒体应用特性的统一内容服务能力。本文从业务流程分析、技术架构的构建、技术亮点与创新点三个方面来论述长江云全媒体内容库技术架构的设计与实现。     

Can smartphones be specialists? Effects of specialization in mobile advertising

Based on the Computers Are Social Actors (CASA) paradigm, this study extends the expectations regarding the superiority of specialists over generalists to mobile technology by examining whether the specialization of a hardware agent (i.e., a smartphone) and a software agent (i.e., an application) has psychological effects on smartphone users who are exposed to mobile advertisements. Results from a between-subjects experiment (N = 80) show that specialist smartphones and applications induce greater trust in advertisements and an increased purchase intention toward the advertised products than generalist smartphones and applications. In addition, the effects of specialization on purchase intention are mediated by trust in advertisements. Theoretical and practical implications of these findings are discussed.     

How vloggers embrace their viewers: Focusing on the roles of para-social interactions and flow experience

Social media allow marketers to directly influence consumers through a diverse set of tools. The characteristics of individual platforms enable the development of creative and innovative strategies for social media marketing. This study aims at examining para-social interactions (PSI), their antecedents (i.e., attitude homophily and physical attractiveness), and their consequences (i.e., consumers’ sense of belonging, flow experience, urge to purchase, addiction, and impulse purchase). The mediating role of flow experience is also examined in this study. Findings, implications, and directions for further research are also presented in this study.     

Factors influencing intention to donate via social network site (SNS): From Asian’s perspective

This study examined whether external factors, which are charity project, charity organization, Internet technology features and social network site (SNS) features influence people’s general attitude towards online donation and their intention to donate via SNS. An online survey was conducted based on the framework of factors influencing the intention to donate via SNS that was adapted from the literature review. Data from 258 respondents were used for analysis. Structural equation modelling was used to test the research model and hypotheses. The results indicated that the Internet technology features factor significantly contributes in influencing people’s general attitude towards online donation, and general attitude positively influences people’s intention to donate via SNSs. The full mediation effect of the general attitude towards online donation on the relationship between Internet technology features and intention to donate via SNS was found. However, charity project, charity organization, and SNS features were not significant factors in influencing people’s intention to donate via SNSs. The sample was limited to some Asian countries (preliminary Malaysia and South Korea). Thus, the results cannot be generalized to other countries. The findings suggest that non-profit organizations should focus on how to deal with the Internet issues, especially pertaining to security and privacy. Therefore, a mechanism for gaining donors’ trust to use the Internet, particularly in doing online transaction must be considered.     

Reframing the Iraq War: Official Sources,Dramatic Events,and Changes in Media Framing

This study examines how official sources and dramatic events influence media framing of political issues, assessing the claims of the indexing hypothesis and event-driven models. Through an analysis of the New York Times' coverage of the Iraq War in late 2005 and early 2006, this study compares coverage from before and after the bombing of a major Shi'ite shrine in Iraq. The analysis shows that journalists avoided the preferred frame of the White House while amplifying the preferred frame of the military. It also shows that the bombing spurred journalists to reframe the conflict. These findings challenge parts of the indexing hypothesis and support a more event-driven model of media framing.     

一种基于信息流的社交网络安全本体模型

社交网站作为互联网的新兴应用,近年来发展迅速。以Facebook和人人网为代表的社交网站现在已经拥有数以百万计的活动用户,创造了一种新的生活方式。但是社交网络快速发展的同时也带来了新的安全问题,如垃圾信息、隐私泄露、身份盗用等。文中尝试用本体来描述社交网络中的信息流动,并提供一个能够识别垃圾信息发送者的自动化解决方案。     

流媒体技术及其在网络教学中的应用

计算机的普及、多媒体技术的发展以及Internet的迅速崛起,给远程教育带来了新的机遇.随着网络及流媒体技术的发展,越来越多的远程教育网站开始采用流媒体作为主要的网络教学方式.本文介绍了流式传输的基本原理以及支持流媒体传输的网络协议,最后给出了基于Windows Media Serv-ices平台的流媒体技术在网络教学中的典型应用方式.     

车路互联网的底层协议-802．11p标准

详细地描述了车路互联网系统的底层协议-802．11p标准。将802．11p与传统无线局域网技术进行对比,分析了802．11p在媒体接入控制层（MAC）与物理层（PHY）所做的修改,并从物理层参数、PP—DU帧结构,以及接人优先级等多方面指出了802．11p能在高速移动环境下建立稳定通信链路的原因。其次,还对802．11p所采用的频段、信道、发射功率以及频谱掩模进行分析;最后提出了802．11p在仿真方面所面临的挑战,并且在Simulink上建立了一套动态仿真系统,对标准进行仿真验证。     

异质社交网络中多通道特征融合的好友推荐模型

合理有效的好友推荐算法对于社交网络的发展和扩张有重大的意义。然而随着社交网络的复杂化和异质化,传统推荐系统中协同过滤推荐方法不能满足需求。针对异质社交网络中存在着大量的内容相关信息这一特点,根据好友推荐的需求,提出了多通道特征融合的好友推荐模型。该模型对用户相关的多维特征进行挖掘与利用,包括显性特征(如用户profile,用户tag,社交关系等)和隐性特征(如用户重要度,挖掘用户标注发现其领域兴趣等),并进一步将这些内容相关的多特征融合到协同排序算法中进行学习训练。实验结果表明,随着多个内容特征的逐步融合,算法的MAP值稳步提高,最终相对未融合的协同排序方法提高了12%,并在一定程度上的解决了冷启动问题,提高了好友推荐的多样性。