基于MSML语言的三维场景特征提取与远程重建技术研究

目前国内外对三维远程监控技术的研究主要还在视频,多媒体的监控阶段,采集的图像为数据庞大的视频流文件,数据量大,传输及加工分析难度大,此种基于模拟信号的监控模式限制了传统监控系统与Internet的融合。因而本文提出一种新的思路,它利用计算机建模技术提取真实现场的三维信息,通过MSML(The machine tool simulation markup language)语言进行远距离传输,利用计算机图形技术的图像抽象描述、特征建模、仿真、立体图形可视化等各种功能,在远程重现真实现场,在教育部现代制造网上合作中心网站网络制造栏目作为示例演示中,受到广泛关注。

一种轻量级低成本媒体服务器的研制

针对媒体服务器在下一代网络(Next Generation Network,NGN)建设中成本过高的问题,提出了一种轻量级低成本的媒体服务器设计实现方案。提出了系统的开发需求,采用轻量级框架、开源组件和协议栈以及复用成熟稳定的B2BUA开发平台,重点阐述了系统框架、媒体服务器控制和会议功能的设计实现。测试表明,系统实现了媒体服务器的基本功能,且功能和性能具备进一步提升的空间,同时系统不依赖于具体的硬件平台。

一种新颖的水声信道参数估计算法

宽带水声信道通常被建模为多扩展多时延(MSML)信道,不同路径的多普勒扩展不同给信道参数估计带来了挑战.本文提出一种新颖的MSML信道参数估计算法,称之为改进的粒子群优化(MPSO)算法.该算法创建一个多径列表来记录局部最优粒子的位置和适应度值,并用于迭代中粒子速度的更新.算法结束时,根据多径列表的记录值,可以同时估计出每一径的多普勒扩展、时延和幅度参数.仿真结果表明:MPSO算法的参数估计精度优于匹配追踪(MP)算法和分数阶傅里叶变换(Fr FT)算法.

Content Addressable Memory Using Automatic Charge Balancing with Self-Control Mechanism and Master-Slave Match Line Design

Content Addressable Memory (CAM) is a type of memory used for high-speed search applications. Due to parallel comparison feature, the CAM memory leads to large power consumption which is caused by frequent pre-charge or discharge of match line. In this paper, CAM for automatic charge balancing with self-control mechanism is proposed to control the voltage swing of ML for reducing the power consumption of CAM. Another technique to reduce the power dissipation is to use MSML, it combines the master-slave architecture with charge minimization technique. Unlike the conventional design, only one match line (ML) is used, whereas in Master-Slave Match Line (MSML) one master ML and several slave MLs are used to reduce the power dissipation in CAM caused by match lines (MLs). Theoretically, the match line (ML) reduces the power consumption up to 50% which is independent of search and match case. The simulation results using Cadence tool of MSML show the reduced power consumption in CAM and modified CAM cell.