智能网络保护技术在煤矿供电系统的应用研究

我国煤炭产业的蓬勃发展,为我国基础设施建设和经济发展提供了不可缺少的能源动力源。因此,在煤矿领域中融入先进的智能网络安全防护技术,促进煤炭工业的现代化,保证煤炭工业能够继续为国家建设做出贡献,已经成为整个行业的一个热点。从我国煤矿供电系统智能网络安全防护技术的发展情况来看,虽然已经取得了长足的进步,但是仍然面临着许多挑战。因此,对上述问题进行深入研究,寻找有效的解决方法,是推进煤矿供电系统发展的关键。

智能网络保护技术在煤矿供电系统防越级跳闸中的应用

由于煤矿井下供电系统的结构特点以及现有设备的局限性,在实际运用中经常出现越级跳闸,引起井下停风、停电等一系列问题。为有效解决煤矿井下越级跳闸问题,通过对煤矿现有基础条件分析,结合目前比较成熟的网络技术,建立了一套网络继电保护的方法,改变了传统开关的保护方式,并对井下变电所现场通信系统进行调整。现场试验表明,该方法使用、维护简单,不需要额外增加设备或线缆,可以有效解决煤矿井下越级跳闸问题。

智能网络继电保护技术在首山一矿的应用

煤矿井下供电系统因其本身的结构特点以及现有设备的局限性,在实际运用中经常出现越级跳闸,引起井下停风、停电等一系列问题。为了有效解决煤矿井下越级跳闸问题,通过建立一套网络继电保护方法,改变了传统的保护方式。该方法经过现场试验证明,不需要额外增加设备或者线缆,维护也简单,可以有效解决煤矿井下越级跳闸问题。

计算机网络信息安全技术研究

在当今的信息化时代，尤其是对于政府机关部门来说，Internet信息技术已成为现代人们信息交换的主要工具，而与此同时产生的相应的问题也不可忽视，比如计算机网络信息安全问题。本文对于几种常用的计算机应用网络信息安全技术进行了重点研究，这是建立在探讨计算机网络信息安全的理论基础之上的，具有很重要的现实意义。

计算机网络信息安全技术研究

在高度信息化的现代,互联网已然成为了信息获取,传递,保存的重要途径,计算机网络信息安全技术的发展关乎到政府部门和社会公众的信息安全,构建完善的计算机网络信息安全系统已经刻不容缓。本文在计算机网络信息安全技术的基础之上重点研究了目前常用的四种计算机网络信息安全技术,包括入侵检测技术,基于防火墙的网络保护技术,信息保护技术以及反病毒技术。

光纤骨干网络组网技术研究

随着近年来通讯技术的不断发展,原有的骨干网络组网方式已经不能够满足大量信息交换的需求,SDH组网技术也应运而生。

论网络经济中反垄断法与知识产权保护的耦合

以技术创新为特征的网络经济具有殊异于传统经济的运作模式,导致其垄断市场的形成机理也有所不同,因而传统经济中的反垄断法规制路径已不能很好地适应网络经济的发展,未来应在动态效率理论的指导下,寻找契合网络经济特点之新的反垄断法规制路径,同时在目标和制度设计上发挥反垄断法和知识产权保护在网络经济中的耦合作用,实现网络经济中竞争与垄断、效率与创新的均衡。

浅谈计算机网络安全与隐私保护的发展

随着网络的普及和互联网的快速发展,网络逐渐成为我们生活工作的一部分,因此,人们越来越重视网络安全问题,对于如何能够更好的保护个人隐私问题引起了人们的广泛关注。通过了解网络安全的相关历史和发展历程,本文从网络安全与隐私保护面对的威胁,网络安全与隐私保护的主要防范技术,网络安全与隐私保护的未来发展趋势进行阐述。

论突破因特网发展瓶颈的十大技术问题

摘要:本文论述了新一代因特网发展面临的十大技术难题,包括身份识别技术、网络知识产权保护技术、个人隐私权保护技术、无线因特网技术、垃圾邮件的过滤技术等,指出了其可能的发展方向。

大型石化控制系统替换升级过程中网络安全防护策略设计

网络安全等级保护技术体系设计按照“一个中心”管理下的“三重防护”体系框架,构建安全机制和策略,形成等级保护对象的安全保护环境。该安全保护环境主要分为安全管理中心、安全通信网络、安全区域边界和安全计算环境4个部分。该文通过对某大型石化企业乙烯联合装置旧有控制系统的网络安全现状进行分析,提出替换设计后控制系统网络安全防护的思路,并对大型乙烯联合装置控制系统进行了网络安全防护技术方案的详细设计,对安装就位的网络安全测试结果良好,这也为后续大型石化控制系统替换升级过程中同步进行网络安全防护应用提供了参考依据。

A New Anonymity Model for Privacy-Preserving Data Publishing

Privacy-preserving data publishing （PPDP） is one of the hot issues in the field of the network security. The existing PPDP technique cannot deal with generality attacks, which explicitly contain the sensitivity attack and the similarity attack. This paper proposes a novel model, （w,γ, k）-anonymity, to avoid generality attacks on both cases of numeric and categorical attributes. We show that the optimal （w, γ, k）-anonymity problem is NP-hard and conduct the Top-down Local recoding （TDL） algorithm to implement the model. Our experiments validate the improvement of our model with real data.

Analysis of coverage problem under border effects in wireless sensor networks

Wireless sensor networks can be used to monitor the interested region by deploying dense sensor nodes. Coverage is a primary metric to evaluate the capacity of monitoring. In this paper, we focus on the coverage problem under border effects, where the sensor nodes are distributed in a circle-shaped region randomly. Under this scenario, we derive the expected coverage of the sensor node and the total network coverage provided by n sensor nodes accurately by probability. These findings are useful to determine the related parameters （sensing range, number of sensor nodes and radius of monitored region） for a specific network coverage ratio. Simulation results demonstrate that our analysis is correct and effective.

Ether net Ring Protection for ITU-T G.8032

Ethernet Ring Protection (ERP) introduced by ITU-T G.8032 Recommendation is a new type of packet-switched network protection technology, which can provide ring automatic protection switch. However, the Filtering Database (FDB) flush method adopted in the current ERP standard has the drawback of introducing a large amount of transient traffic overshoot caused by flooded Ethernet frames right after protection switching. In this article, we propose a G.8032 ERP scheme that uses FDB flush based on area to resolve this issue and investigate how the proposed scheme deals with the traffic flooding problem. The theoretical analysis and simulation show that the proposed scheme can effectively improve the performance of the Ethernet ring by decreasing the unnecessary FDB flush in comparison with the existing approaches.

Brief Analysis on the Right of Privacy in a Perspective of Law and Economic

The development of the technology of network had been of great convenience to get access to information. However, it was undeniable that a bad phenomenon had become even more and more serious that others＇ information would be obtained by illegal means, and the research on the protection of privacy had increasingly aroused people＇s concern. The right of privacy not only had the usually outside personality characteristics, but also had a certain characteristics of property. This paper had attempted to study the right of privacy from the perspective of law and economics by interpreting the property in the right of privacy, in order to perfect the protection system of privacy in our country.

Simulation Studies of an Integrated Overcurrent Relay Protection Scheme for Distribution Systems

This paper presents an integrated protection technique for power distribution systems. A novel integrated protection scheme based on overcurrent protection technique for distribution system is described, in which a specially designed protection relay is installed at each substation of a network and responsible for the protection of every line sections connected to the substation busbar The conventional directional overcurrent and the new adaptive accelerated protection algorithms with multiple settings are implemented into the relay to cover all the protected line sections. The paper includes studies of a typical multi section distribution network to demonstrate the principle of the scheme. Studies show that the new scheme not only offer the new protection features for individual power line section, but also provide the characteristics of integrated protection.

Modeling of Robust Design of Remanufacturing Logistics Networks

The uncertainty of time, quantity and quality of recycling products leads to the bad stability and flexibility of remanufacturing logistics networks, while general design only covers the minimizing logistics cost, so robust design is presented to solve it. The mathematical model of remanufacturing logistics networks is built on the stochastic distribution of uncontrollable factors, and robust objectives are presented. The basic elements of robust design of remanufacturing logistics are redefined, and each part of mathematical model is explained in detail as well. Robust design of remanufacturing logistics networks is a problem of multi-objective optimization in essence.

业内动态

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缝缝补补又一年——Windowse XP SP2 beta 1新特性一览

2003年12月18日，微软终于释放出人们盼望已久的Windowse XP SP2的第一个测试版。可惜同时放出的只有英文和德文版。在简体中文版的WinXP上无法升级，不过没关系，无论什么语言版本，新特性都是一样的，就让我们看看SP2 beta 1（以下简称SP2 b1）到底带来些什么吧！