共查询到20条相似文献,搜索用时 234 毫秒
1.
随着国内气象观测的不断发展,气象资料种类和数量不断增加,各类气象业务对数据传输时效和质量要求也不断提高,现有的以9210系统软件为核心的第3代国内气象通信系统已不能很好地适应新的需求。考虑未来业务发展需求,讲述了整合CMACast的第4代国内气象通信系统的实施方案。方案基于中国气象局全国宽带通信网络(CMANet)搭建国家和省级两级气象通信节点,实现气象资料在统一平台下的高效传输、规范的数据处理和统一的业务监视,通过软、硬件整合中国气象局新一代卫星数据广播系统(CMACast)提供数据下行播发能力,采用多台服务器在并行集群环境下的数据共享和作业分担技术,实现了一个高性能、高可靠、可扩展、易于维护的系统。经过国家级和省级的气象通信业务试运行和气象通信传输压力测试,表明该系统数据具有很强的传输处理能力,能够为未来业务扩展提供支撑。 相似文献
2.
介绍了民航信息核心网络的概况以及DWDM技术原理、应用情况。结合DWDM技术的一些特点,分析了DWDM在民航信息网络中应用的设计方案。该研究对于如何通过应用DWDM技术建立一个高可靠性、高冗余、高容量核心网络系统,并实现核心网络异地备份以及不同业务数据分离的目标有一定的参考价值。 相似文献
3.
4.
5.
6.
终端安全管理系统是中国气象局信息安全防护体系的重要组成部分,为业务系统和办公网络的各类终端提供基本的安全保证。但是终端安全管理系统在气象业务环境下还没有形成有效的研究和经验积累。随着全国气象业务系统面临的安全风险不断增加,探索气象业务系统部署终端安全防护系统,保证气象数据的安全性的问题亟待解决。文中以气象业务系统的终端数据安全为出发点,根据中国气象局信息网络一体化建设的需要,结合CIMISS等业务系统的数据流转过程,通过研究在业务系统建立终端安全防护机制,引入一定的机器学习算法对安全事件进行分析与分类,在一定的范围内对安全事件进行归纳总结,发现存在的深层次问题并进行针对性整改,从而大幅降低终端用户的安全风险。 相似文献
7.
为满足静止气象卫星地面应用系统的运行管理需求,保证业务系统的高可靠性和维护响应的高时效性,设计了一套基于短消息平台的业务维护管理系统。该系统由短消息平台、实时业务监测和自动维护管理三部分组成,能够实时监测多套卫星系统的业务关键点,及时发现业务故障和特殊事件,利用短消息平台实现消息的集中管理和即时发送,同时具备故障策略管理、维护调度管理和自动化维护响应等功能。实施效果表明该系统具备良好的适用性和可扩展性,能有效减轻维护管理人员的工作压力,为高时效和高可靠要求的大型系统维护管理工作提供有效的技术手段。 相似文献
8.
中国气象局卫星数据广播系统(简称CMACast系统)是将中国气象局现有的PCVSAT、FENGYUNC、DVBBS三套卫星广播业务系统进行整合,实现各类气象数据、视频资源的统一播放和国内外小站式的统一管理。本篇文章着重介绍CMACast特点、系统软件、常见故障,对地市局台站安装该软件起到指导作用。 相似文献
9.
10.
在对当前数据监视平台主要设计模式分析的基础上,结合业务流的概念,提出一种基于业务流的混合模式数据监视平台设计方法。基于该方法,按照中国气象局的实际需求,实现一个气象服务业务数据监视平台,该平台设计灵活,具有一定的通用性,系统运行稳定可靠。 相似文献
11.
Baoliang Liu Lirong Cui Shubin Si Yanqing Wen 《IEEE/CAA Journal of Automatica Sinica》2016,3(1):90-95
In this paper, the system which operates in multiple environments is studied. The environment process is governed by a Markov process, and the deterioration process is governed by another Markov process given the system in a certain environment. In terms of the above two processes, a new Markov process is constructed to represent the evolution of the system. In terms of Ion-channel modeling theory, Markov process theory and matrix partition method, some reliability indexes for the system are obtained, i.e., system reliability, environment reliability, system multiple-interval reliability, system availability, environment availability, system multiple-point availability, etc. Finally, a numerical example is given to illustrate the results obtained in the paper. 相似文献
12.
To have effective production planning and control, it is necessary to calculate the reliability and availability of a production system as a whole. Considering only machine reliability in the calculations would most likely result unmet due dates. In this study, a new modelling approach for determining the reliability and availability of a production system is proposed by considering all the components of the system and their hierarchy in the system structure. Components of a production system are defined as production processes; components of the processes are defined as sub-processes. In this hierarchical structure we could model all kinds of failures such as material and supply, management and personnel, and machine and equipment. In the analysis, a fuzzy Bayesian method is used to quantify the uncertainties in the production environment. The suggested modelling approach is illustrated on an example. In the example, also a separate reliability and availability analysis is conducted which only considered machine failures, and the results of both analyses are compared. 相似文献
13.
Presents a modeling approach based on stochastic Petri nets to estimate the reliability and availability of programs in a distributed computing system environment. In this environment, successful execution of programs is conditioned on the successful access of related files distributed throughout the system. The use of stochastic Petri nets is demonstrated by extending a basic reliability model to account for repair actions when faults occur. To this end, two possible models are discussed: the global repair model, which assumes a centralized repair team that restores the system to its original status when a failure state is reached, and the local repair model, which assumes that repairs are localized to the node where they occur. The former model is useful in evaluating the availability of programs (or the availability of the hardware support) subject to hardware faults that are repaired globally; therefore, the programs of interest can be interrupted. On the other hand, the latter model can be used to evaluate program reliability in the presence of hardware faults subject to repair, without interrupting the normal operation of the system 相似文献
14.
15.
16.
嵌入式实时控制系统硬件可靠性及应用研究 总被引:3,自引:1,他引:2
嵌入式实时控制系统硬件故障是造成系统失效的主要原因之一,针对此问题,首先定义嵌入式实时控制系统硬件体系结构;然后分析嵌入式实时控制系统的可用性和失效模式,并对单个IP硬核和嵌入式实时控制系统硬件应用Markov链建立了可靠性模型;最后用所建立的模型,对嵌入式联锁控制器硬件进行了可靠度计算和分析。通过计算可知,所建立的可靠性模型能够描述嵌入式实时控制系统硬件的状态变迁,并能定量预测和分析其可靠度,模型具有一定的实用价值。 相似文献
17.
18.
BALBIR S. DHILLON SUBRAMANYAM N. RAYAPATI 《International journal of systems science》2013,44(4):589-611
Four newly developed probabilistic models representing two unit parallel and standby redundant systems with human errors are presented. The supplementary variables method is used to develop the system availability expressions for all four models. In the case of Models II and IV, a general formula for the system steady-state availability is developed when the failed system repair times are erlangian distributed. System reliability, mean time to failure and variance of time to failure formulae are developed for Models I and III. Specific plots are shown to demonstrate the impact of human error on system reliability, availability and mean time to failure. 相似文献
19.
针对特定试验条件下小子样控制系统可靠性评定的特点,引入故障率分析,介绍了基于马尔可夫过程可维修控制系统的可靠性分析方法,推导了n个部件组成的串联可维修系统可用度的表达式,并针对具体工程用控制系统进行了可用度仿真计算。最后借助可靠性分析软件验证了该方法的合理性。两种方法结论一致,为其他结构可修系统的可靠性分析提供了重要的理论依据。 相似文献
20.
汽轮机自动控制系统的可靠性预测 总被引:2,自引:0,他引:2
本文提出了汽轮机自动控制系统可靠性的预测方法,给出了汽轮机自动控制系统的可靠
性框图、子系统部件严重的失效模式、系统可用度的预测公式和可靠性预测实例. 相似文献