Windows Media Foundation是最新推出的基于COM技术和Vista操作系统的多媒体应用程序开发工具包,它代表着未来多媒体应用程序开发的方向。文中详细地介绍了WMF的基本架构和工作原理。并讨论了在Visual Studio2008上应用WMF开发播放器。...Windows Media Foundation是最新推出的基于COM技术和Vista操作系统的多媒体应用程序开发工具包,它代表着未来多媒体应用程序开发的方向。文中详细地介绍了WMF的基本架构和工作原理。并讨论了在Visual Studio2008上应用WMF开发播放器。实验结果证明该播放器实现了更流畅的播放与更佳的播放效果。展开更多
Video streaming,especially hypertext transfer protocol based(HTTP) adaptive streaming(HAS) of video,has been expected to be a dominant application over mobile networks in the near future,which brings huge challenge fo...Video streaming,especially hypertext transfer protocol based(HTTP) adaptive streaming(HAS) of video,has been expected to be a dominant application over mobile networks in the near future,which brings huge challenge for the mobile networks.Although some works have been done for video streaming delivery in heterogeneous cellular networks,most of them focus on the video streaming scheduling or the caching strategy design.The problem of joint user association and rate allocation to maximize the system utility while satisfying the requirement of the quality of experience of users is largely ignored.In this paper,the problem of joint user association and rate allocation for HTTP adaptive streaming in heterogeneous cellular networks is studied,we model the optimization problem as a mixed integer programming problem.And to reduce the computational complexity,an optimal rate allocation using the Lagrangian dual method under the assumption of knowing user association for BSs is first solved.Then we use the many-to-one matching model to analyze the user association problem,and the joint user association and rate allocation based on the distributed greedy matching algorithm is proposed.Finally,extensive simulation results are illustrated to demonstrate the performance of the proposed scheme.展开更多
Focus on audience participation in online news media has increased rapidly in recent years. Online newspapers offer their audience several opportunities to participate, for example, by submitting comments on articles ...Focus on audience participation in online news media has increased rapidly in recent years. Online newspapers offer their audience several opportunities to participate, for example, by submitting comments on articles or uploading pictures/videos. Audience participation has also emerged as a fast growing research field： The motives for focusing on audience participation have been analyzed and the kind of participatory opportunities that news media offer the audience have been mapped. Also, questions on whether audience participation should be regarded as an advantage or disadvantage to professional journalism have been discussed. This study relates to the latter perspective as it examines media practitioners＇ perceptions of audience participation. By focusing on the case of Swedish newspaper journalists, this study analyzes how audience participation is perceived to affect journalistic work and to what extent such participation is believed to benefit journalism. Based on a representative survey of Swedish journalists, conducted in 2011-2012, and a survey of journalists working at three local morning papers in Sweden, conducted in 2009, the analyses reveal a rather ambivalence attitude to audience participation among the journalistic corps.展开更多
This paper explores the key vocabularies, themes, ideas, artistic movements, and technological innovations contributing to the development of the digital arts over time. As new media theorists have argued, one of the ...This paper explores the key vocabularies, themes, ideas, artistic movements, and technological innovations contributing to the development of the digital arts over time. As new media theorists have argued, one of the defining features of the digital arts is the break-down of divisions between art forms, and between art and society （for example, Manovich 2001, 2005）. This paper outlines how digital processes intersect with aesthetic and conceptual forms. Relevant frameworks, such as materiality, embodiment, hybridity, interactivity, and narrativity, form the origins of the genre. Digital artworks, like digital media, are interactive, participatory, dynamic, and customizable, incorporating shifting data flows and real-time user inputs （Paul 2003, 67）. The customization of content and technology, as well as the recontextualization of information, characterize projects of digital art.展开更多
Using the Internet to learn a language creates wide opportunities to enhance learning （Association of teachers of English in Catalonia （APAC）, 2010）. The Internet activities promote learners＇ self-monitoring abil...Using the Internet to learn a language creates wide opportunities to enhance learning （Association of teachers of English in Catalonia （APAC）, 2010）. The Internet activities promote learners＇ self-monitoring ability, encourage the use of multimedia and network technology, and develop students＇ cooperation and participation. During the latest years, there have been many changes in education as these new technologies, including VLEs （Virtual Learning Environments）, which have become an important part in the teaching/learning process. According to Tech Terms Computer Dictionary （2012）, VLE is a virtual classroom where teachers and students communicate. VLEs have evolved as at an early stage, they were only ways of transmitting information： Teachers uploaded the multimedia resources and students read this information. At a higher stage, VLEs have become interactive. This means that students become active. We have designed a virtual environment where students, weekly, must contribute their opinions and comments in response to a required activity uploaded by the teacher. In this paper, we describe this weekly task and analyze students＇ opinion about this planned activity. The students become an active subject in this field. In this paper, we show how VLEs are no longer a means of transmitting information but a means of interaction as well as a way of motivating our students to be involved in their learning process展开更多
The purpose of this study is to design a tool, adapted to students＇ individual contexts and to enable students to reflect on their understanding of media characteristics. AHP （analytic hierarchy process） is a struc...The purpose of this study is to design a tool, adapted to students＇ individual contexts and to enable students to reflect on their understanding of media characteristics. AHP （analytic hierarchy process） is a structured technique for organizing and analyzing complex decisions. Using AHP, students have to define appropriate criteria and priorities for using media. It is expected that students＂ understanding of the characteristics of different types of media will emerge through reflection. Seventy two university students took part in this research. They were asked to prioritize their ways.of obtaining information about current affairs using sets of media such as TV, books, newspapers and web pages, Twitter and Facebook. AHP enables us to visualize a ＂real＂ understanding of media characteristics and students can reflect on that basis. As far as ＂information sources and media＂ is concerned, a few students indicated that it was the information source itself that was important rather than the type of media. Our tool fulfils the role of encouraging this type of reflection.展开更多
With the development of modem scientific technology, multimedia teaching as a new teaching method has got involved in the practical teaching. Making full use of this method will bring great benefits for English teachi...With the development of modem scientific technology, multimedia teaching as a new teaching method has got involved in the practical teaching. Making full use of this method will bring great benefits for English teaching. Besides the unique advantages and the present situations of multimedia applied in English teaching, it is more important for us to find out its drawbacks in practical teaching process, such as the ineffective application of multimedia by teachers. Then, the related strategies mast be put forward improving the teaching facilities of multimedia. This paper mainly discusses the related strategies in order to create a better teaching environment and facilitate the training of teachers. After studying this paper, we will have a good knowledge of the multimedia teaching. Consequently, we can apply the multimedia into the traditional teaching. Multimedia resources are also very useful for teachers to meet the requirements in our modem society. Meanwhile, it will promote the teaching reform and improve the level of education in our country.展开更多
文摘Windows Media Foundation是最新推出的基于COM技术和Vista操作系统的多媒体应用程序开发工具包,它代表着未来多媒体应用程序开发的方向。文中详细地介绍了WMF的基本架构和工作原理。并讨论了在Visual Studio2008上应用WMF开发播放器。实验结果证明该播放器实现了更流畅的播放与更佳的播放效果。
基金fully supported under the National Natural Science Funds(Project Number:61501042 and 61302089)National High Technology Research and Development Program(863)of China(Project Number:2015AA016101 and 2015AA015702)BUPT Special Program for Youth Scientific Research Innovation(Grant No.2015RC10)
文摘Video streaming,especially hypertext transfer protocol based(HTTP) adaptive streaming(HAS) of video,has been expected to be a dominant application over mobile networks in the near future,which brings huge challenge for the mobile networks.Although some works have been done for video streaming delivery in heterogeneous cellular networks,most of them focus on the video streaming scheduling or the caching strategy design.The problem of joint user association and rate allocation to maximize the system utility while satisfying the requirement of the quality of experience of users is largely ignored.In this paper,the problem of joint user association and rate allocation for HTTP adaptive streaming in heterogeneous cellular networks is studied,we model the optimization problem as a mixed integer programming problem.And to reduce the computational complexity,an optimal rate allocation using the Lagrangian dual method under the assumption of knowing user association for BSs is first solved.Then we use the many-to-one matching model to analyze the user association problem,and the joint user association and rate allocation based on the distributed greedy matching algorithm is proposed.Finally,extensive simulation results are illustrated to demonstrate the performance of the proposed scheme.
文摘Focus on audience participation in online news media has increased rapidly in recent years. Online newspapers offer their audience several opportunities to participate, for example, by submitting comments on articles or uploading pictures/videos. Audience participation has also emerged as a fast growing research field： The motives for focusing on audience participation have been analyzed and the kind of participatory opportunities that news media offer the audience have been mapped. Also, questions on whether audience participation should be regarded as an advantage or disadvantage to professional journalism have been discussed. This study relates to the latter perspective as it examines media practitioners＇ perceptions of audience participation. By focusing on the case of Swedish newspaper journalists, this study analyzes how audience participation is perceived to affect journalistic work and to what extent such participation is believed to benefit journalism. Based on a representative survey of Swedish journalists, conducted in 2011-2012, and a survey of journalists working at three local morning papers in Sweden, conducted in 2009, the analyses reveal a rather ambivalence attitude to audience participation among the journalistic corps.
文摘This paper explores the key vocabularies, themes, ideas, artistic movements, and technological innovations contributing to the development of the digital arts over time. As new media theorists have argued, one of the defining features of the digital arts is the break-down of divisions between art forms, and between art and society （for example, Manovich 2001, 2005）. This paper outlines how digital processes intersect with aesthetic and conceptual forms. Relevant frameworks, such as materiality, embodiment, hybridity, interactivity, and narrativity, form the origins of the genre. Digital artworks, like digital media, are interactive, participatory, dynamic, and customizable, incorporating shifting data flows and real-time user inputs （Paul 2003, 67）. The customization of content and technology, as well as the recontextualization of information, characterize projects of digital art.
文摘Using the Internet to learn a language creates wide opportunities to enhance learning （Association of teachers of English in Catalonia （APAC）, 2010）. The Internet activities promote learners＇ self-monitoring ability, encourage the use of multimedia and network technology, and develop students＇ cooperation and participation. During the latest years, there have been many changes in education as these new technologies, including VLEs （Virtual Learning Environments）, which have become an important part in the teaching/learning process. According to Tech Terms Computer Dictionary （2012）, VLE is a virtual classroom where teachers and students communicate. VLEs have evolved as at an early stage, they were only ways of transmitting information： Teachers uploaded the multimedia resources and students read this information. At a higher stage, VLEs have become interactive. This means that students become active. We have designed a virtual environment where students, weekly, must contribute their opinions and comments in response to a required activity uploaded by the teacher. In this paper, we describe this weekly task and analyze students＇ opinion about this planned activity. The students become an active subject in this field. In this paper, we show how VLEs are no longer a means of transmitting information but a means of interaction as well as a way of motivating our students to be involved in their learning process
文摘The purpose of this study is to design a tool, adapted to students＇ individual contexts and to enable students to reflect on their understanding of media characteristics. AHP （analytic hierarchy process） is a structured technique for organizing and analyzing complex decisions. Using AHP, students have to define appropriate criteria and priorities for using media. It is expected that students＂ understanding of the characteristics of different types of media will emerge through reflection. Seventy two university students took part in this research. They were asked to prioritize their ways.of obtaining information about current affairs using sets of media such as TV, books, newspapers and web pages, Twitter and Facebook. AHP enables us to visualize a ＂real＂ understanding of media characteristics and students can reflect on that basis. As far as ＂information sources and media＂ is concerned, a few students indicated that it was the information source itself that was important rather than the type of media. Our tool fulfils the role of encouraging this type of reflection.
文摘With the development of modem scientific technology, multimedia teaching as a new teaching method has got involved in the practical teaching. Making full use of this method will bring great benefits for English teaching. Besides the unique advantages and the present situations of multimedia applied in English teaching, it is more important for us to find out its drawbacks in practical teaching process, such as the ineffective application of multimedia by teachers. Then, the related strategies mast be put forward improving the teaching facilities of multimedia. This paper mainly discusses the related strategies in order to create a better teaching environment and facilitate the training of teachers. After studying this paper, we will have a good knowledge of the multimedia teaching. Consequently, we can apply the multimedia into the traditional teaching. Multimedia resources are also very useful for teachers to meet the requirements in our modem society. Meanwhile, it will promote the teaching reform and improve the level of education in our country.
