Wouldn t it be great if we could somehow give visual commands to our computer without touching the keyboard or mouse? In this article, we will put together a simple laser gesture recognition application and use it to control Windows Media Player. Thi

详细描述了基于SIP的VoIP复杂的安全问题，并且阐述了身份认证、加载MIME消息体 来扩展SIP消息和加密包等解决方法。提出一套新的安全框架，在链路层和网络层(交换机)、传输和会话层(防火墙)及应用层(基f-jl~．务器的软件等)多个层实施安全措施来根本解决诸多安全隐患。-A detailed descr iption of SIP-based VoIP complex security issues and expounded on authentication, loading MIM

用C#编写的乔安网络高清摄像机监控程序，程序简化了原来复杂的内容，适合初学者运用。(Prepared by C# QiaoAn network high-definition camera monitoring procedures, procedures to simplify the original complex content, suitable for beginners to use.)