Results 11 to 20 of about 1,033,026 (46)
A Utility-based QoS Model for Emerging Multimedia Applications [PDF]
Existing network QoS models do not sufficiently reflect the challenges faced by high-throughput, always-on, inelastic multimedia applications. In this paper, a utility-based QoS model is proposed as a user layer extension to existing communication QoS ...
Garcia, Francisco +2 more
core +5 more sources
QoS in Node-disjoint Routing for Ad Hoc Networks [PDF]
PhDA mobile ad hoc network (MANET) is a collection of mobile nodes that can communicate with each other without using any fixed infrastructure. It is necessary for MANETs to have efficient routing protocol and quality of service (QoS) mechanism to ...
Liu, Luo
core +4 more sources
多QoS 约束下的工作流调度是网格计算中难以求解的问题. 在深入剖析该问题难解性基础上,采用克隆 选择算法求解该问题. 首先通过增加网格服务的唯一标识,简化工作流调度的编码方式. 其次,提出QoS 偏好的概 念,将调度问题的目标函数转换为适应值函数. 该算法具有QoS 属性的可扩展性. 最后通过大量实验,优化算法参 数,与基于遗传算法、蚁群算法的调度算法对比,克隆选择算法求解效率较优. 在扩展情况下,与单一QoS 约束下的 时间、费用贪婪算法对比,克隆选择算法能进行最优调度.国家自然科学基金项目(
赵建峰, 曾文华, 刘敏
core
QoS-aware service selection considering potential service failures [PDF]
Nowadays, service compositions are increasingly used to execute business processes. During the execution of a service composition, a service failure leads to a necessary re-planning.
Lewerenz, Lars, Heinrich, Bernd
core +1 more source
WiMAX Mesh 网络中基于多用户的保证 QoS 的自适应资源调度算法
WiMAXMesh 网络资源调度可以分为集中式调度和分布式调度。对于集中式的资源调度,在图染色算法和 PMP 调度算法的基础上,提出了保证 QoS 的自适应资源调度算法。该算法在确定资源调度顺序时,采用了业务流拓扑信息、业务流服务质量满意度以及业务流优先级等参数。对 rtPS 的业务丢包率、nrtPS 的业务吞吐量和系统的吞吐量等参数进行了仿真对比,结果显示自适应能源调度算法能够根据实际的需要更加灵活地满足 QoS 需求。
丽媛 肖, 炜 贺, 培 乔
core +1 more source
Especificação semântica de QoS: a ontologia QoS-MO [PDF]
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Ciência da ComputaçãoEste trabalho apresenta a ontologia QoS-MO que permite a especificação de características e requisitos de QoS para Web ...
Tondello, Gustavo Fortes
core
Design, implementation and evaluation of a QoS-aware transport protocol [PDF]
In the context of a reconfigurable transport protocol framework, we propose a QoS-aware Transport Protocol (QSTP), specifically designed to operate over QoS-enabled networks with bandwidth guarantee.
Sénac, Patrick +2 more
core +1 more source
目前云技术被广泛应用于数据中心网络(DCN),为确保DCN服务质量(QoS),等价多路径路由(ECMP)算法和动态负载均衡(DLB)算法被作为解决方案。然而这些算法仅能获得局部优化效果,将其应用在DCN重载环境下时,得到的传输时延和带宽利用率等指标不尽如人意。文章针对这些算法的局限性,从全局优化的角度提出一种软件定义网络(SDN)架构下的胖树网络数据流量载荷均衡调度算法。该算法通过Ryu控制器监视全局实时参量来评估SDN节点和链路载荷情况,选出最符合流量载荷需求的最优转发路径。实验表明 ...
许文庆, 余庚
doaj
本实用新型涉及一种多角度微调平台,该多角度微调平台包括平台底座以及微调平台;所述平台底座与微调平台之间设有一至少局部表面为球面的连接机构,球面连接机构周围分布有至少三个用于调节平台底座和微调平台之间距离的微调连接件;平台底座与微调平台之间通过微调连接件耦合连接并调节;该多角度微调平台结构简单,通用性强 ...
孙云飞 +4 more
core
本发明提供一种高精度摆镜轴系组件组合调校方法,该组合调校方法包括以下步骤:(1)粗加工各零件;(2)再半精加工各零件;(3)组装各零件构成待精加工的摆镜组件;(4)对左轴和右轴分别进行精加工,使得尺寸、圆柱度、端面垂直度、以及左、右轴同轴度符合设计要求;然后根据此时摆镜组件中左、右轴所确定的左右轴旋转中心线精加工摆镜座的摆镜安放槽,使得摆镜安装面位置与左右轴旋转中心线符合平行度和垂直距离的设计要求;(5)配钻、铰削摆镜座左、右两侧的定位销钉孔,试装轴定位销钉。本发明简化了调校操作过程 ...
杨宾宏, 彭小强, 邓小国, 李华
core

