分区魔术师PartitionMagic的妙用

PartitionMagic分区魔术师可以在不损失硬盘中已有数据的前提下对硬盘进行重新分区、格式化分区、复制分区、移动分区、隐藏/重现分区、从任意分区引导系统、转换分区(如FAT<-->FAT32)结构属性等。文中介绍了一种利用PartitionMagic软件创建新分区、合并分区和调整分区容量及分区格式转换的详细操作过程。     

用diskgenius找回计算机硬盘丢失的分区和文件

在计算机的维护过程中，经常会遇到系统误操作，造成分区丢失，文件无法找回的情况，提供了一种找回分区的方法，并用实例说明了操作过程。     

Local dimming效果与分区数的关系研究

Local dimming(区域背光调控)是改善被动发光的液晶显示器性能的重要技术.采用一套自主开发的仿真算法,在充分验证其准确性后,对液晶显示器的对比度和光晕指数随分区数的变化关系进行了计算仿真与分析,最终形成背光分区数设计指引.分析结果表明:对比度随分区数的增加而增加,RTINGS棋盘格图片最大价值点(导数为1的点)为300分区,要达到足够接近最大对比度,则需要1600分区左右;背光行列分区数为8的倍数时有更好的对比度体现;光晕指数与对比度随分区数变化的趋势相似,RTINGS十字架图片最大价值点(导数为1)为500分区.     

一种提高大型可分区服务器柔软性的方案

文章针对大型可分区服务器的资源配置和管理缺乏柔软性的现象，提出了一种基于分区技术的资源配置和资源重组的方案。该方案解决了大型可分区服务器的资源最大化利用率问题和资源调整的柔软性问题。文章给出了分区资源配置和调整的方案．该方案已应用于某一基于大型可分区服务器的虚拟操作管理系统．该管理系统已经投入使用，取得了良好的效果。     

基于多Agent的实时ETL系统模型研究

针对传统ETL系统难以满足企业对实时数据的需求,提出了一种基于多Agent技术的实时ETL系统模型,通过多个Agent相互协同工作实现实时ETL,利用实时分区和静态分区来加载和更新数据。实验表明,该模型能够实现实时ETL功能,并且具有较好的主动性和灵活性。     

航空电子核心处理分区优化设计及仿真研究

具有严格实时保障和安全保障的航空电子核心处理系统广泛采用分区管理技术,通过分层调度结构,满足任务时空隔离运行.通过将分区抢占行为看作是一个虚拟周期任务,针对下层调度器分别采用固定优先级和动态优先级两种调度策略,讨论了分区调度设计问题;利用分区任务调度的空闲时间构建分区调度保障条件,给出了满足任务可调度性的分区参数求解表...     

Linux2．6内核的vivi分区及内核MTD分区

本文在分析vivi分区与内核MTD分区的基本概念及两者关系的基础上，详细介绍了基于S3C2410开发板的Linux2．6内核下的vivi及内核MTD分区方法。     

自律计算在服务器虚拟化管理中的应用

随着网格计算和公用计算发展,虚拟化成为在整合资源、帮助用户随需地取用资源方面的核心技术.本文把自律计算技术和虚拟化技术结合起来,通过把服务器资源分区,共享内存区域的分区连接成群集,实现了系统的高可用性和自我管理.     

智能可分区校园广播系统设计及相关参数计算

通常要求校园广播系统具有分区广播功能，因此在设计这种校园广播系统时应进行相关参数的计算，并依据计算结果选择相关设备，介绍一种利用智能矩阵分区器实现智能可分区广播的设计方案，给出系统连接示意图及相关参数的计算公式，说明系统施工安装要求，给出一应用实例的主要设备选型。     

室内分区切换导致掉话的解决方案探讨

针对高层建筑室内电梯覆盖因分区切换导致掉话的问题，文章提出了分区覆盖方案，分析了增加切换重叠区及合理设置HORQST对掉话的改善。     

Resource partitioning for real-time communication

For real-time communication services to achieve widespread usage, it is important that network managers be allowed to control the services effectively. An important management capability concerns resource partitioning. Resource partitioning is useful for a number of applications, including the creation of virtual private subnetworks and of mechanisms for advance reservation of real-time network services, fast establishment of real-time connections, and mobile computing with real-time communication. In previous work, the authors presented a scheme for resource partitioning in a guaranteed performance networking environment with EDD-based packet scheduling disciplines. The present paper gives the results of research in resource partitioning, with admission control tests for resource partitioned servers for four representative scheduling disciplines, FIFO, WFQ, RCSP and EDD. The simulations confirm the intuition that resource fragmentation losses due to resource partitioning are small and that resource partitioning reduces the admission control computation overhead. An interesting result from the simulation experiments is that, under circumstances that arise naturally in multi-party communication scenarios, resource partitioning results in higher overall connection acceptance rate. The authors also present experiences with implementing resource partitioning in the second generation of Tenet real-time protocols; this implementation, with resource partitioned servers, runs on multiple platforms, including Sun workstations under SunOS, DEC workstations under Ultrix, and PCs under BSDI Unix     

A genetic‐based decision algorithm for multisite computation offloading in mobile cloud computing

Mobile cloud computing is a promising approach to improve the mobile device's efficiency in terms of energy consumption and execution time. In this context, mobile devices can offload the computation‐intensive parts of their applications to powerful cloud servers. However, they should decide what computation‐intensive parts are appropriate for offloading to be beneficial instead of local execution on the mobile device. Moreover, in the real world, different types of clouds/servers with heterogeneous processing speeds are available that should be considered for offloading. Because making offloading decision in multisite context is an NP‐complete, obtaining an optimal solution is time consuming. Hence, we use a near optimal decision algorithm to find the best‐possible partitioning for offloading to multisite clouds/servers. We use a genetic algorithm and adjust it for multisite offloading problem. Also, genetic operators are modified to reduce the ineffective solutions and hence obtain the best‐possible solutions in a reasonable time. We evaluated the efficiency of the proposed method using graphs of real mobile applications in simulation experiments. The evaluation results demonstrate that our proposal outperforms other counterparts in terms of energy consumption, execution time, and weighted cost model.     

DNS权威名字服务器性能与安全性的研究

与根域名服务器等顶级域相比,本地的权威名字服务器更易于发生设备故障和遭受恶意攻击。阐述了权威名字服务器的现状并实现了一个新型DNS测量工具DNSAuth来自动获取权威名字服务器的信息。实验着重分析了权威名字服务器的分布、地理位置及其对性能和安全性的影响,按照五个有代表性的属性,对中国Top100网站的权威名字服务器进行了量化评估,实验结果表明只有32%的权威名字服务器具有较好的性能和安全性。     

Balancing workload and recovery load on distributed fault-tolerantVOD systems

This letter presents a new code sequence for dispatching playback jobs among distributed video-on-demand servers. The dispatch accordingly has the property of evenly distributing workload among all servers and balancing recovery load on surviving servers if one of the servers fails. We give an O((n-1)!) algorithm for efficiently finding a dispatch sequence for n servers     

基于QA-NIZK证明系统的高效简短可验证洗牌方案

电子投票中为保护投票者的隐私,要由一系列混合服务器对选票进行洗牌操作,为保证洗牌操作的诚实性,需要可验证洗牌方案。现有简短可验证洗牌方案的证明大小要依赖于混合服务器的数量和投票者的数量,效率较低。基于近来的一个高效的QA-NIZK证明系统构建了一个高效的简短可验证洗牌方案,不管有多少混合器和投票者其证明大小都是O(1),即常量大小。具有其独立的意义是在构建中指出原QA-NIZK证明系统是可变的。     

移动边缘计算卸载技术综述

移动边缘计算(Mobile Edge Computing,MEC)将云服务器的计算资源扩展到更靠近用户一侧的网络边缘,使得用户可以将任务卸载到边缘服务器,从而克服原先云计算中将任务卸载到云服务器所带来的高时延问题。首先介绍了移动边缘计算的基本概念、基本框架和应用场景,然后围绕卸载决策、联合资源分配的卸载决策分别从单MEC服务器和多MEC服务器两种场景总结了任务卸载技术的研究现状,最后结合当前MEC卸载技术中存在的不足展望了未来MEC卸载技术的研究。     

Self-organized public-key management for mobile ad hoc networks

In contrast with conventional networks, mobile ad hoc networks usually do not provide online access to trusted authorities or to centralized servers, and they exhibit frequent partitioning due to link and node failures and to node mobility. For these reasons, traditional security solutions that require online trusted authorities or certificate repositories are not well-suited for securing ad hoc networks. We propose a fully self-organized public-key management system that allows users to generate their public-private key pairs, to issue certificates, and to perform authentication regardless of the network partitions and without any centralized services. Furthermore, our approach does not require any trusted authority, not even in the system initialization phase.     

多Web服务器负载均衡技术的研究

本文分析了近年来数据中心关键技术之一的多Web服务器的负载均衡技术,并设计和实现了一种基于软件的多Web服务器负载均衡软件原理,采用该方法能够有效地平衡负载,尤其适合于单台服务器处理用户请求能力不足而需要扩展三到五倍处理能力的中小型数据中心。     

珠海台网络硬盘多频道数字播控系统

叙述了以视频服务器为中心构建的网络化多频道自动播出系统的实践、见解和系统的特点。该系统着重考虑了视频服务器选型、系统可靠性、网络化控制及监控、信号共享等问题；同时，实现了多路同时上载、多路边播边上载，以及自动延时播出等功能。     

Topic allocation method on edge servers for latency-sensitive notification service

The importance of real-time notification has been growing for social services and Intelligent Transporting System (ITS). As an advanced version of Pub/Sub systems, publish-process-subscribe systems, where published messages are spooled and processed on edge servers, have been proposed to achieve data-driven intelligent notifications. In this paper, we present a system that allows a topic to be managed on multiple edge servers so that messages are processed near the publishers, even when publishers spread over a wide area. Duplicating messages on geographically distributed servers could enable immediate notification to neighboring subscribers. However, the duplicated message spool may cause exhaustion of resources. We prepare a formal model of our publish-process-subscribe system and formulate the topic allocation as an optimization problem under the resource constraints of edge servers. As the optimization problem is NP-hard, we propose heuristics leveraging the locality and the pub/sub relationships observed between clients to use the edge server resources efficiently. Our performance evaluation shows that our method reduces the delay to deliver notifications and the effectiveness of the strategy exploiting the relationships between clients.