AIS—NC多类型开放队列网络性能分析

本文研究了基于网络计算机会计信息系统性能分析方法，针对会计信息系统结构特点及硬件资源请求类型，抽象出三种系统响应模式．据此，构建了AIS-NC多类型开放队列网络性能模型，并且给出了性能分析的步骤和方法．举例说明了该方法的应用．该方法对其他多类型开放队列网络性能分析具有借鉴意义．     

Sufficiency and fuzziness in random experiments

In previous papers, the consequences of the “presence of fuzziness” in the experimental information on which statistical inferences are based were discussed. Thus, the intuitive assertion «fuzziness entails a loss of information» was formalized, by comparing the information in the “exact case” with that in the “fuzzy case”. This comparison was carried out through different criteria to compare experiments (in particular, that based on the “pattern” one, Blackwell's sufficiency criterion). Our purpose now is slightly different, in the sense that we try to compare two “fuzzy cases”. More precisely, the question we are interested in is the following: how will different “degrees of fuzziness” in the experimental information affect the sufficiency? In this paper, a study of this question is carried out by constructing an alternative criterion (equivalent to sufficiency under comparability conditions), but whose interpretation is more intuitive in the fuzzy case. The study is first developed for Bernoulli experiments, and the coherence with the axiomatic requirements for measures of fuzziness is also analyzed in such a situation. Then it is generalized to other random experiments and a simple example is examined.     

浅谈现代信息技术在马克思主义理论传播中的应用

现代信息技术具有全球化、多媒体、交互性和即时性等特点,运用现代信息技术传播马克思主义理论是增强传播效果的有效手段和必然选择。当前,Web网站、微博、微信成为了人们获取信息的主要渠道之一,马克思主义理论应积极占领这些阵地,建立发声渠道,形成舆论强势。     

基于SOA的“绿色智能”电网信息集成展示

近年来智能电网建设,受到国家高度重视,智能电网建设是促进绿色用电,提高用电安全性的可靠保证。为了积极的督促智能电网的建设,更好的展示智能电网建设成果,本文提出了建设基于面向服务架构(Servise Oriented Architecture,SOA)的智能电网综合信息集成展示系统。详细介绍了智能配网综合信息集成设计,并阐述了清洁能源微网接入、配电自动化、智能用电等相关信息集成后的综合展示,立足“绿色智能”的思想,从发电、配电、到用电整过程,突出体现智能电网的建设成果。     

On the effects of a spacecraft subcarrier unbalanced modulator

This paper presents mathematical models with associated analysis of the deleterious effects which a spacecraft's subcarrier unbalanced modulator has on the performance of a phase-modulated residual carrier communications link. The undesired spectral components produced by the phase and amplitude imbalances in the subcarrier modulator can cause (1) potential interference to the carrier tracking and (2) degradation in the telemetry bit signal-to-noise ratio (SNR). A suitable model for the unbalanced modulator is developed and the threshold levels of undesired components that fall into the carrier tracking loop are determined. The distribution of the carrier phase error caused by the additive White Gaussian noise (AWGN) and undesired component at the residual RF carrier is derived for the limiting cases. Further, this paper analyses the telemetry bit signal-to-noise ratio degradations due to undesirable spectral components as well as the carrier tracking phase error induced by phase and amplitude imbalances. Numerical results which indicate the sensitivity of the carrier tracking loop and the telemetry symbol-error rate (SER) to various parameters of the models are also provided as a tool in the design of the subcarrier balanced modulator.     

协同作战系统的时间同步

协同作战中需要高精度的时间同步将各站点在同一时间获得的信息融合,从而获得精确的敌方目标态势图来作出相应的对策。结合传统算法TPSN中的同步封包交换及FPST中的根节点动态选取,设计在无GPS授时状态下,协同作战系统中适用的时间同步算法及具体的同步方案。保证了同步网络的健壮性及伸缩性,其理论上可达到的同步精度符合协同作战的需求。     

迅速崛起的亚太光纤市场

本文归纳分析出亚太光纤市场的两个显著特点，介绍了亚太地区光通信发展水平，以及亚太各国和地区间的光通信合作，指出亚太光纤市场得以迅速发展的主要原因。     

光传输网节能减排浅析

信息通信技术的出现,大大提高了人类社会发展的效率和步伐,而信息通信技术自身的节能减排也随着其日益广泛的应用而变得越来越重要。光传输网作为信息传送的底层核心载体,其节能减排不仅可以减少自身的碳排放,也为整个通信网的节能减排带来了更大的空间。     

企业信息安全立体防护体系构建及运行

根据系统工程学和信息安全工程学理论,采用霍尔三维方法界定了企业信息安全防护体系边界,构建其ISM逻辑结构模型。结合项目管理领域知识,进一步探讨了信息安全防护的立体运行框架,为企业信息安全防护工作的落实提供有效指导。