基于 Qt ＆ Linux 视频播放器的设计与实现

随着嵌入式处理器运算能力不断增强,影音娱乐已经成为人们日常生活中必不可少的一部分。设计以博创公司 ARM9开发板（UP -TECH2410）为平台,以 Linux 为开发环境,Qt 为开发工具,详细介绍了硬件平台搭建,嵌入式操作系统选型,Qt Designer 以及视频播放器的设计方法。实现了 Linux 下对 LCD 的显示功能及开发板触摸屏控制的实现。通过测试,系统运行正常,性能稳定。开发过程以 ARM9与 Linux 操作系统结合开发的模式突破了以往的嵌入式开发架构,为嵌入式系统开发开辟了一种新途径。     

2011年6月份十大重要安全漏洞分析

国家计算机网络入侵防范中心在该文中介绍了2011年6月份的网络安全漏洞的整体情况,分别统计了“紧急”、“高”、“中”、“低”不同威胁级别的漏洞数量,并从中选取了十个重要安全漏洞,对其内容和危害进行了分析,进而提出了应对的措施.     

Improving player experience in Computer Games by using players' behavior analysis and linguistic descriptions

Understanding player behavior has an interest to computer games researchers and developers since it allows them to improve the design and implementation of computer games and also to ensure that players have the expected experiences. Currently this knowledge is not usually reported to players as feedback, although sometimes it is already used as an analysis tool. This paper presents a novel technology for automatically generating linguistic reports and immediate feedback from actions performed by players during play sessions. These reports allow developers to provide players with a more complete and personalized feedback about their behaviors, abilities, attitudes, skills or movements. In order to show and explore the possibilities of this new technology, we have incorporated it in the core of a computer game. We have evaluated positively that the incorporation of this kind of feedback into the core of YADY computer game allows us to improve the overall player experience.     

Exploring player experience in ranked League of Legends

ABSTRACT

While video games provide different Player Experiences (PE), some genres can provide particularly unique PEs driven by their particular features. Such is the case of MOBA (Multiplayer Online Battle Arena) games, currently led in number of players and popularity by League of Legends. In spite of this popularity, PE in MOBA games remains largely unexplored. We aim to explore this gap by presenting a PE study that focuses in League of Legends and its player base. After surveying more than 400 players in the database of the largest eSports organisation in Spain, a series of tests were run from multiple perspectives using the PENS (Player Experience of Need Satisfaction) model and the SPGQ (Social Presence in Gaming Questionnaire) as response variables. Among our findings, we show how PE differs across different levels of competence (or rank) inside the game. When looking at how team play impact PE, results show how PENS dimensions remain unaffected while empathy is driven by playing with known teammates. Role selection, on the other hand, has an arguably insignificant impact in PE. Last but not least, an invariant behavioural engagement across all dimensions shows how players perceive team collaboration as an essential factor for success.     

运用VLC媒体播放器增加HDTV播出频道的实践

VLC是一个开放源代码的、跨平台的多媒体播放器,它可以播放多种音频和视频格式(MPEG-1、MPEG-2、MPEG-4、D ix、MP3、Ogg等以及DVD、VCD、CD音频以及各种流媒体协议),VLC同时也具有转码能力(UDP unicast和multicas、tHTTP等),主要为宽带网络设计的流媒体服务器使用。基于上述软件,结合拥有G igabitEthernet I/O板卡的统计复用网关DM6400、复用/加扰/调制器BN G6104和播发服务器、HDTV机顶盒,试验播出2个HDTV频道。     

2011年4月份十大重要安全漏洞分析

2011年03月21日至4月20日,国家计算机网络入侵防范中心发布漏洞总条目为360条,漏洞总数比上月增加了5.26。其中威胁级别为＂紧急＂的有51条,＂高＂的有60条,＂中＂的有205条,＂低＂的有44条。威胁级别为＂紧急＂和＂高＂的漏洞占到总量的30.83,从漏洞利用方式来看,远程攻击的有274条,本地攻击的有86条,局域网攻击的有0条。可见,能够从远程进行攻击的漏洞占绝大多数,这使得攻击者利用相应漏洞发动攻击更为容易。4月微软发布17个安全公告,其中9个为严重等级,8个为重要等级,共修复Microsoft Windows、Microsoft Office、Internet Explorer、Visual Studio、.Net Framework和GDI＋（图形设备接口）中的64个漏洞。此外,Adobe也发布通告公布了Adobe Flash Player、Adobe Reader和Acrobat中发现的一个零日远程代码漏洞,该漏洞已被利用进行攻击。建议广大用户及时安装补丁,增强系统安全性,做好安全防范工作,保证信息系统安全。     

VS.NET的精品资源共享课程网站设计与实现

基于ASP.NET技术及CKPLAYER播放器技术,设计了一个VS.NET精品资源共享课网站.该网站能根据用户需要随时收看课程视频、阅读查找相关资料、交流学习心得等,交互性强,安全性高。     

移动视频监控业务技术方案分析

移动视频监控业务结合视频监控业务和移动网络二者的优点,能为用户带来全新的业务体验,将为运营商开辟新的移动增值业务市场。本文分析移动视频监控业务的技术原理,详细介绍了一种基于移动流媒体平台实现移动视频监控业务的可行性解决方案,该方案可为运营商节省系统建设和业务运维成本。     

基于S3C6410的井下救援视频处理终端

针对现有井下救援视频信号差,易受环境干扰,系统集成度低,不能实时显示现场救援信息等问题,提出了一种适用于井下救援通信的嵌入式视频信号处理系统。系统主要包括井下视频采集端和井上救援指挥端。井下视频采集端系统采用Linux作为软件开发平台,利用S3C6410自带的编码器MFC对视频数据进行H.264标准压缩编码;井上救援指挥端系统在VS2005开发环境下实现视频解码,网络传输和应用程序的开发,并针对矿山救援环境特点优化开源H.264解码算法。该系统完成了救援现场视频处理,提高了设备集成度和视频画面清新度,实现了井下救援的可视化。     

适应极地气候的管道施工吊管机柴油机冷起动性能的CNG加热系统研究

针对在极地气候对吊管机用柴油机进气道采用加热辅助冷起动技术,即采用压缩天然气（CNG）加热器燃烧加热空气,利用颗粒式热容器,实现对空滤器过来的冷空气加热的目的。加热后的空气通过进气歧管,进入气缸,实现整个进气管路的加热,使得柴油机起动时进入气缸的空气平均温度达到0℃以上,从而确保柴油机在-45℃条件下顺利起动。