IPv6单播路由协议的新特性与应用研究

当前中小城市的下一代互联网建设比较迟缓,主要原因是对IPv6路由协议认识不足,缺少组网实践经验和工程技术指导。文中详细阐述了IPv6单播路由协议具备的新特性和工作机制,包括常用RIPng、OSPFv3、IPv6-IS-IS和BGP4+,使用思科仿真软件平台分别应用上述几种路由协议开展不同场景下的组网应用,设计了典型网络方案,给出了配置中的关键代码并分析了路由协议的运行状态和路由信息。仿真实验验证了IPv6单播路由协议的新特性,具有较好的工程技术实用价值,有助于促进现实IPv4网络向IPv6过渡的进程。     

On the simulation of expressional animation based on facial MoCap

MoCap(motion capture)-based animation is a hot issue in computer animation research currently.Based on the optical MoCap system,this paper proposes a novel cross-mapping based facial expression simulating method.To overcome the problem of the false upper and lower jaw correlation derived from the facial global RBFbased cross-mapping method,we construct a functional partition based RBF cross-mapping method.During model animating,enhanced markers are added and animated by our proposed skin motion mechanism.In addition,based on the enhanced markers,an improved RBF-based animating approach is raised to derive realistic facial animation.Further more,a pre-computing algorithm is presented to reduce computational cost for real-time simulation.The experiments proved that the method can not only map the MoCap data of one subject to diferent personalized faces but generate realistic facial animation.     

Application of parallel mechanism in varistructured quadruped/biped human-carrying walking chair robot

For the existing problems of walking chair robot such as simple function,lower bearing capacity and not walking in complex environment,a novel varistructured quadruped / biped human-carrying walking chair robot is proposed.The proposed robot could be used as biped and quadruped walking chair robots.Considering the conversion of the walking chair robot from the quadruped to the biped or vice versa,6-UPS and 2-UPS+UP(U,P and S are universal joint,the prismatic pair,and sphere joint,respectively) parallel mechanisms are selected as the leg mechanism of the biped walking robot and quadruped walking robot,respectively.Combining the screw theory and theory of mechanism,the degrees of freedom of the leg mechanism and the body mechanism in diferent motion states are computed so as to meet the requirements of mechanism design.The motion characteristics of the 2-UPS+UP parallel mechanism which is the key part of the walking chair robot are analyzed.Then,the workspace of the moving platform is drawn and the efect of the structural parameters on the workspace volume is studied.Finally,it is found that the volume of the workspace of the moving platform is bigger when the side length ratio and the vertex angle ratio of the fxed platform and the moving platform which are isosceles triangles are close to 1.This study provides a theoretical foundation for the prototype development.     

信息化项目实施中的问题反馈及处理机制分析

针对煤炭企业信息化项目的特殊性,以某煤炭企业信息化项目为例,分析了项目在实施过程中存在的问题,并提出了客观、合理的对策,建立了问题反馈及处理机制,实现了对项目实施过程的动态管理,对于实施信息化系统具有一定的借鉴作用。     

石拱桥拱圈加固的约束机理分析

通过分析套箍和砌体横向应变关系,探讨了采用钢筋昆凝土套箍加固石拱桥对核心砌体的约束机理,并提出了套箍对核心砌体的约束应力及由于套箍约束作用使砌体强度提高的计算方法.同时,通过此方法对巴中市南江县龙渠大桥进行了加固设计,计算后得知主拱圈承载力得到明显提高,且实际运用效果良好.     

水面蒸发模型的进一步优化

水面蒸发量是水文水利计算、径流分析预测及水资源利用评价的主要内容,针对目前水面蒸发计算模型存在的问题,通过对水面蒸发机理的分析,采用最小二乘回归法,建立了由主要影响因子构成的修正系数函数对由相对次要因子构成的主体函数进行修正的基本模型,经比较,该模型具有较好的拟合精度。     

惠州抽水蓄能电站库区清理工作研究

水库库区清理是水利水电工程建设项目必不可少的部分。本文介绍了新兴的抽水蓄能电站水库库区清理工作的要点、实施方法和实施技巧。将国内暂处于探索阶段的抽水蓄能电站库区清理技术应用到惠州蓄能水电厂施工期,并对取得的经验进行了总结。抽水蓄能电站因为水库水体来源的不同,和自循环能力小的特点,考虑到环境和安全的因素,必须比常规水电站进行更为仔细地清理,在蓄水期作持续反复的维护、保持和监控工作,以期电厂进入生产期后水库水质能尽快复苏。     

一种单构件双运动机理微小型机器人移动机构

传统微小型机器人的移动机构难以同时满足对高移动速度和高分辨力的需求,而宏微双重移动机构通 常存在结构复杂的缺点．针对这一问题,提出一种单构件双运动机理移动机构．该机构具有双重运动机理,即非谐 振条件下的粘滑运动机理和谐振条件下的碰撞运动机理,分别用于实现较高的运动分辨力和较高的运动速度．实验 结果表明,原理样机在前进与后退方向的运动分辨力分别可以达到0.896 mm 和0.456 mm,在10V 电压驱动下运动 速度可达172 mm/s．该机构结构简单,易于微小型化与批量制造,同时具有较高的运动速度与运动分辨力,可以提 高微小型机器人的运动性能．     

基于蚁群混沌行为的离散粒子群算法及其应用

考虑蚁群算法与粒子群算法的各自特点,在粒子群算法的基础上借鉴蚁群算法的信息素机制,对粒子群算法的速度位置更新公式重新定义,提出了一种基于蚁群混沌行为的离散粒子群算法,并将其应用到背包问题中。实验结果表明,该算法可以得到较优解。