搜索结果: 61-75 共查到“工学 Mesh”相关记录144条 . 查询时间(0.176 秒)
针对无线Mesh网络性能需求,及其路由所面临的挑战,以OLSR路由协议为基础,提出一种链路认知的路由协议LC-OLSR。协议对节点负载、链路投递率和链路可用性等环境进行感知和推理,获得网络中节点之间的路径链路质量评价,评价结果用于路由的优化,达到提高网络吞吐率和负载均衡的目的。仿真表明,LC-OLSR能够提高无线Mesh网络的分组递交率,降低平均端到端延时,一定程度上达到了负载均衡的目的。
基于网格搜索算法的圆锥度误差计算(Mesh Searching Algorithm for Calculating Conicity Error)
圆锥度 网格搜索算法 最小区域
2010/12/29
针对圆锥度误差评定中寻找理想圆锥轴线问题,提出了网格搜索算法,并建立了圆锥度误差数学模型。该算法是在圆锥初始、终止截面的最小二乘圆心周围,布置一定边长的正方形并以此划分网格点,将两截面的网格点两两连线作为理论圆锥轴线,计算最小区域圆锥度误差。论述了采用网格搜索算法求解圆锥度误差的原理和步骤。实例表明,网格搜索算法可以有效、正确地评定圆锥度误差。
三角网格曲面高精度刀轨快速生成算法(Research on High Precision and Fast Generation Algorithm of NC Tool Path for Triangular Mesh Surface)
三角网格曲面 刀轨生成 曲线逼近
2010/12/28
提出一种三角网格曲面刀轨生成算法,该算法引入R*-tree索引结构并对其进行改进,建立三角网格曲面的三维空间索引结构,快速获取局部型面参考数据并分析其微分几何性质,基于局部型面1阶连续约束条件,采用抛物线逼近网格边界,实现三角网格曲面精度补偿,对网格边界曲线与刀轨截面求交获取刀位数据,对其排序生成刀轨,实例表明该算法数据适应性强,生成数控加工刀轨精度高,算法运行速度快。
该文针对多信道无线mesh网络,采用基于效用最优的定价机制,提出了一种功率-干扰价格模型,并基于该模型提出了一种分布式联合信道分配和功率分配算法。每个节点根据自己所消耗功率状况合理地定功率价格,并根据自己所受干扰状况合理地定干扰价格。通过功率价格和干扰价格来调节链路的信道分配和功率分配,使网络效用最大化。仿真结果表明:所提出的算法能够快速、平稳地收敛到近似最优解。同时还仿真了网络可用信道数目、节点...
一种环境感知的无线Mesh网络自适应QoS路径选择算法
无线Mesh网络 环境感知 MAC重传 链路质量
2013/8/20
本文针对如何改善无线多跳Mesh网络的服务质量,满足无线多媒体业务对数据传输的带宽、时延、抖动的要求等问题,研究了一种基于无线信道状态和链路质量统计的MAC层最大重传次数的自适应调整算法。该算法通过对无线Mesh网络的无线信道环境的动态感知,利用分层判断法区分无线分组丢失的主要原因是无线差错还是网络拥塞导致,实时调整MAC层的最佳重传次数,降低无线网络中的分组冲突概率。基于链路状态信息的统计和最大...
802.11s无线Mesh网络中协作多样性感知的路由度量和协作路由协议
无线Mesh网络 协作多样性 路由协议
2011/12/26
提出了802.11s无线Mesh网络中协作多样性感知的路由度量,并提出了适应无线Mesh网络特点的协作式路由协议(CDARP)与协作媒体访问控制协议(CMAC).通过构建协作虚拟节点、计算协作链路度量,CDARP-CMAC能够选择最合理的路径进行协作数据传输.实验结果表明,与最优路径的协作机制相比,CDARP-CMAC协议提高了网络有效吞吐量5%~13%;同时降低了数据包丢包率5%~10%.
Vehicle gearbox dynamics: centre distance influence on mesh stiffness and spur gear dynamics
vehicle gearbox spur gear mesh stiffness centre distance dynamics diagnostic
2010/10/29
Vehicle gearbox dynamics is characterized by time varying mesh stiffness. The paper presents a survey of methods used for determining mesh stiffness and the analysis of the centre distance influence o...
无线Mesh网中时延约束抖动优化的多路径流量分配算法
无线Mesh网 流量分配 多路径传输 路径时延
2012/4/17
针对无线Mesh网中多媒体应用的特点,研究多路径传输中路径时延满足约束且路径间抖动最小化的路径流量分配问题。首先,基于网络演算理论分析了数据分组在无线Mesh网单路径传输中产生的队列时延,推导出单路径传输的时延上界以及多路径传输中的路径间时延抖动上界,并得到满足时延约束的路径最大容许流入速率;然后,基于时延及其抖动上界,提出满足时延约束抖动优化的路径流量分配算法DCJOTA,该算法根据路径最大容许...
Ring Topology Based Mesh Sensing System with Self-healing Function using FBGs and AWG
Optical sensing sensors Networks ring
2015/6/10
We propose and experimentally demonstrate a novel sensing system based on FBG sensors with comprehensive self-healing capability in a mesh-ring-based topology by utilizing the FSR and periodic filteri...
An Information-Diffusion-Based Routing Scheme in Wavelength-Routed WDM Mesh Networks
Networks Networks assignment routing algorithms
2015/6/5
We propose a novel information-diffusion-based routing (IDBR) scheme in wavelength routed WDM mesh networks. The IDBR scheme has the fast convergence and the low bandwidth consumption of OSPF-TE while...
The goals for ULH mesh network design should be reach optimization of the whole network and preparation for the future growth. We propose an approach that designs each ROADM-to-ROADM section independe...
A novel self-healing WDM mesh network structure is proposed with economic self-healing functionality. Without the need of wavelength conversion or backup fiber links, 77-channels CATV traffic is succe...
Exploiting Excess Capacity for Improved Robustness in Optical WDM Backbone Mesh Networks
Networks network optimization Networks network survivability
2015/6/4
Any operational network has some excess capacity to accommodate new traffic demands and avoid early exhaustion of bandwidth resources. Exploiting this unused capacity to improve robustness of an optic...
Experimental investigation of the quality of transmission in transparent mesh networks with mixed fiber types
Fiber optics communications Fiber optics links subsystems
2015/6/4
We experimentally investigate the quality of transmission in mesh networks relying on various fiber types. We show that the quality of transmission can be evaluated accurately using the weighted nonli...