无线网络业务云图的实现方法与应用

文章对移动网络业务云图的实现方法进行研究,重点提出区域栅格化划分思路及栅格化云图实现技术,通过比较云图不同实现方法之间的差异性,突出体现了栅格化区域云图在数据热点查找中具备的客观、直观、实用以及支持后续数据分析等多种优越性。     

卫星通信在全球信息栅格中的应用研究

本文首先对美全球信息栅格的概念、结构和研究现状进行了简要的介绍,然后重点分析了卫星在全球信息栅格中的应用情况．从业务角度分别讨论了窄带、宽带和抗干扰卫星通信系统．并阐述了电信港计划和整合的卫星通信与全球信息栅格,结合外军卫星通信的发展现状．提出了我军卫星通信和栅格化网络的发展建议。     

海量测试数据的场景化指标精细分析研究

本文提出了一种基于军事栅格、地理信息的多场景海量数据的精细化分析方法,能够支持用户在GIS地图上自定义测试场景;同时基于军事栅格,将海量测试数据进行切割和存储;从而实现测试数据与测试场景的关联,完成场景化指标的精细化分析。该方法能够提高场景化分析效率,深度挖掘大数据资源,节约测试和分析成本。     

栅格化稀疏重构的风电场杂波抑制方法

针对风轮机杂波对雷达探测的干扰问题,提出了一种基于栅格化稀疏重构的风轮机杂波抑制方法。本文首先建立了风轮机杂波干扰下的回波信号模型,分析了风轮机杂波和目标回波信号的差异性,并根据差异性构建了基于风轮机杂波特征的过完备字典,利用正交匹配追踪算法(OMP)逐级栅格化更新字典原子,再对杂波信号栅格化稀疏重构,从而实现了对目标和杂波信号的分离,达到了抑制风轮机杂波信号的目的。最后,通过与常规固定字典重构方法的仿真对比,验证了该栅格化字典稀疏重构方法的有效性。      

基于SOA的栅格安全服务研究

以网络和信息为中心的栅格Grid技术正在经历前所未有的发展,论文在分析SOA架构及GIG、Globus安全架构和技术的基础上,提出以面向服务的思想设计栅格安全,实现栅格安全服务化及栅格服务安全化,设计了基于SOA架构的身份认证服务、权限管理服务和审计服务模型。     

一种航空自组网GRID路由协议栅格长度划分方法

分析了航空自组网GRID路由协议的特点,在对GRID路由协议中栅格长度、节点有效辐射 半径以及节点通信功率联合研究的基础上,通过理论分析和数学推导,得出栅格长度、节点 有效辐射半径在一定通信功率条件下的定量关系,为GRID路由协议中栅格长度的划分提供了 一 种新的思路和科学的划分方法,对GRID路由协议在今后航空自组网中的研究设计具备一定的 实用价值。     

全球信息栅格网与其他网系关系探讨

本文在应用场合、系统组成、关键技术和相互关系几方面对全球信息栅格(GIG)、指战员信息网-战术级(WIN-T)、小部队作战态势感知系统(SUO SAS)和战术互联网(T1)进行对比分析。     

基于用户群模型及体验构建自主型网优系统

为了应对通信网络每天数亿级DPI数据的秒级响应,减少依靠专家经验的优化工作量,实现网络维度实时分析,提升互联网用户对网络的满意度。通过对移动互联网各用户各业务的调研和信令分析,回溯用户的历史感知,研究多元线性回归方法在用户群模型定位异常网络事件的应用,同时与传统专家预判式的优化方式进行对比,提出了基于用户群模型采用x DR信令关联分析方法、NAE地理栅格化和网络可视化等手段创新网优工作模式,构建自主型网优系统。     

基于移动蜂窝网的机器学习室外指纹定位方案

基于移动蜂窝网络技术的定位方案是提供网络优化、紧急救援、公安巡警和位置服务等应用的重要技术途径之一。传统的基于小区基站位置信息的定位方案定位精度低、定位误差大,无法满足某些定位应用需求。基于指纹定位的方案能够在基于小区粗定位方案基础上大幅度提升定位精度、节约计算成本、增强适用性,成为定位研究的热点。针对室外指纹定位的业务需求,深入研究分析了两种基于机器学习的栅格化和非栅格化室外指纹定位方案。通过参数加权、数据拟合等方法对于大规模指纹数据进行了清洗,提高数据源的有效性。通过划定研究区域、栅格化、构建指纹数据库、训练模型、修正模型、非栅格化、粗定位耦合、匹配参数、训练参数等子模块的实现,分析和优化了算法的运行效率和定位精度,确定了影响算法性能的关键指标。进而结合仿真结果,分析了两种基于指纹的定位方案的性能。最后介绍了基于机器学习的指纹定位方案在实际应用中的典型场景。     

栅格化网络信任传递技术研究

栅格化网络对信息安全的要求愈加迫切,有必要对其信任传递技术进行研究和验证。构建面向服务的端到端业务访问的安全体系结构,提出栅格环境下跨域业务访问的安全防护等关键技术,形成基于业务属性为驱动的动态安全策略防护机制,实现不同类型业务的安全服务能力,有效地保证系统的可靠运转,为栅格化网络的建设保障提供有力支撑,并对后期的研究工作进行了展望。     

基于SCMSWEB的网格资源监控研究与实现

网格监控是构建网格系统的重要组成部分,它对优化和管理网格内异构资源起着非常重要的作用.就当前网格监控面临的问题,研究网格监控体系构架GMA和当前流行的网格监控系统,分析了SCMSWEB网格监控系统的特点和结构,并实现了基于SCMSWEB的网格监控.     

IES600系统在龙岩电网的应用

IES600系统结合龙岩电网模式的转换,在原有调度自动化系统的基础上,针对如何快速有效提高电网监控判断力,以保证电网安全稳定运行为目的。在电网信息、数据处理上不断完善,建成了数据中心和应用集成环境,实现数据整合、交换、共享、联机应用支持及数据分析展现、信息发布。大大提高了电网调度人员对事故信息的分析和判断力,有利于电网事故的快速判断和处理,减少停电时间。对全国地区电网运行集中监控的实用化推广具有重要意义。     

Convergence of physical optics integrals by Ludwig's technique

The convergence properties of Ludwig's integration technique are investigated, when applied to physical optics (PO) analysis. It is demonstrated that the rate of convergence is sensitive to the choice of integration grid co-ordinate system. Examples of PO analysis applied to paraboloidal and ellipsoidal reflectors show the reduction in computation time achievable when using a cartesian integration grid rather than a polar grid.     

Properties of a nonisosceles triangular grid planar phased array

An array with a general triangular grid structure (not necessarily isosceles) is considered, and methods of generating such an array are described. An analysis of its properties is presented. It is shown that this array has a grating lobe of -6 dB relative to the main lobe. The necessary conditions to avoid grating lobes are presented, with the conventional rectangular and isosceles triangular grids included as special cases. Furthermore, it is shown that one of the grid dimensions can be extended as compared to that of an isosceles triangular grid. However, when this is done, the optimal, grid area is reduced.     

A deformable grid-matching approach for microarray images.

A fundamental step of microarray image analysis is the detection of the grid structure for the accurate location of each spot, representing the state of a given gene in a particular experimental condition. This step is known as gridding and belongs to the class of deformable grid matching problems which are well known in literature. Most of the available microarray gridding approaches require human intervention; for example, to specify landmarks, some points in the spot grid, or even to precisely locate individual spots. Automating this part of the process can allow high throughput analysis. This paper focuses on the development of a fully automated procedure for the problem of automatic microarray gridding. It is grounded on the Bayesian paradigm and on image analysis techniques. The procedure has two main steps. The first step, based on the Radon transform, is aimed at generating a grid hypothesis; the second step accounts for local grid deformations. The accuracy and properties of the procedure are quantitatively assessed over a set of synthetic and real images; the results are compared with well-known methods available from the literature.     

Parallel numerical applications on grid environments

Grid computing for electromagnetics is one of the few available books that present real applications running on grids. It's a practical book for researchers who want to set up a computational grid and understand the perspectives that grid computing platforms offer. It would also be suitable as a classroom text for undergraduate physics or electrical engineering students with some knowledge of computer networks, C programming, and numerical analysis.     

基于动态冗余机制的数据并行型计算网格模型

在由多个普通计算机机群构成的网格环境下,为了解决大规模数据并行型计算加速比问题、容错问题和动态负载均衡问题,提出了一个基于动态冗余机制的数据并行型网格模型。给出了由多个计算机机群组成的数据并行型计算网格等一系列形式化定义。利用逻辑计算机机群、机群逻辑环、计算节点逻辑环和m-冗余策略,研究了动态冗余、动态负载均衡技术。根据这些技术,描述了网格环境下的数据并行型计算过程。理论分析和实践表明,该模型有效地解决了大规模数据并行型计算所需的负载均衡、容错和资源优化问题。该模型适合基于网格的数据并行型计算。     

Enhancement of Distributed Generation by Using Custom Power Device

Wind energy (WE) has become immensely popular for distributed generation (DG). This case presents the monitoring, modeling, control, and analysis of the two-level three-phase WE based DG system where the electric grid interfacing custom power device (CPD) is controlled to perform the smart exchanging of electric power as per the Indian grid code. WE is connected to DC link of CPD for the grid integration purpose. The CPD based distributed static compensator, i.e. the distributed static synchronous compensator (DSTATCOM), is utilized for injecting the wind power to the point of common coupling (PCC) and also acts against the reactive power demand. The novel indirect current control scheme of DSTATCOM regulates the power import and export between the WE and the electric grid system. It also acts as a compensator and performs both the key features simultaneously. Hence, the penetration of additional generated WE power to the grid is increased by 20% to 25%. The burden of reactive power compensation from grid is reduced by DSTATCOM. The modeling and simulation are done in MATLAB. The results are validated and verified.     

Reliability and performance of tree-structured grid services

Grid computing is a new emerging technology aiming at large-scale resource sharing, and global-area collaboration. It is a next step in an evolution of parallel and distributed computing. Due to the large scale and complexity of the grid system, its performance and reliability are difficult to model, analyse, and evaluate. This paper presents a model that relaxes some assumptions unsuitable for grid computing systems that have been made in the existed works studying the distributed systems. The paper proposes a virtual tree model of the grid service. This model simplifies the physical structure of a grid service, allows service performance (execution time) to be estimated, and takes into account the common cause failures in communication channels. Based on the model, an algorithm for evaluating the grid service performance distribution and the service reliability indices is suggested. The algorithm is based on graph theory, and Bayesian analysis. Illustrative examples are presented in which the results of the suggested algorithm are compared with simulation results.     

Web数据互访中的安全技术研究

针对数据网格中如何实现数据安全的双向传输和互访问题,提出了数据网格管道化处理模型(Grid DataChannelisation Handling Model,GDCHM).对此模型中数据传递方式进行了分析,对实现技术进行了探讨,就GD-CHM中如何实现客户之间、客户与服务器之间数据的安全传递和互访的实现方法进行了研究,通过在NET框架下设计Windows服务中间件技术来解决了数据互访和安全的问题.