防火墙技术在煤矿企业网络中的应用价值

随着网络科技的发展,现代煤矿企业对网络利用也得到提高,基于煤矿企业安全生产管理系统需通过计算机网络技术的支持。但随着互联网的进一步开放,煤矿企业与互联网融合的同时,也迎来了网络安全隐患的挑战。防火墙技术是目前解决计算机网络安全问题行之有效的方法,文章的重点是通过分析防火墙基本技术,探究防火墙对煤矿企业网络的安全方面的价值与意义。     

网络安全的关键技术

随着互联网的飞速发展,网络安全逐渐成为一个潜在的巨大问题。很多企业为了保障自身服务器或数据安全都采用了防火墙。防火墙是网络安全的关键技术。其核心思想是在不安全的网络环境中构造一个相对安全的子网环境。采用防火墙是网络安全最主要、最核心、最有效的手段之一。文章重点讨论防火墙定义、防火墙的工作原理、防火墙的功能、防火墙的安全功能、防火墙技术及防火墙的主要优点和缺点。     

浅析HTTP隧道个人防火墙技术

当今社会,人们的工作、生活已经离不开网络,这使得网络安全问题变得越来越重要。个人防火墙的使用就是为了防范恶意的网络攻击行为,保护着网络的安全。文章分析了个人防火墙技术,提出了HTTP隧道技术反向连接结合穿透防火墙通信方法,实现了其模块设计,并用于实际防火墙,验证了这种方法的有效性和可靠性。     

网络防火墙技术浅述

论述了网络防火墙安全技术的分类及其主要技术特征、防火墙部署原则，防火墙的选择标准。     

防火墙在计算机安全中的应用

在网络应用中,来自网络中的恶意攻击也呈现上升的趋势。为防止网络攻击,防火墙技术应运而生。防火墙介于不同网络之间,可有效阻断网络间的恶意攻击,防止恶意的访问,确保网络内的信息数据安全。本文将系统阐述防火墙的作用、种类,并阐明防火墙的应用手段和技术重点。     

浅析煤矿企业计算机网络安全技术

该文就信息网络安全内涵发生的根本变化,阐述煤矿企业信息安全体系的重要性及建立网络安全体系的必要性。论述了网络防火墙安全技术的分类及其主要技术特征。     

防火墙技术中基于角色访问的控制策略

以防火墙实现技术为背景,对Windows防火墙技术的数据包截获模块和数据包过滤模块这2大核心模块着重进行了研究,实现关于防火墙技术中的角色访问控制策略。并综合比较各种网络数据包拦截技术,针对传统过滤匹配算法的缺陷,从逻辑上将网络用户划归为不同网段,对截获到的网络数据包进行过滤处理。     

Linux下集成Iptables与Snort构筑安全防护体系

当前网络安全技术中的防火墙技术和入侵检测技术已经发展得比较成熟,但是各有其优缺点。把防火墙与入侵检测系统集成使用进行网络防护,顺应了网络安全发展的需要,弥补了两者的不足之处。文章在详细地阐述网络入侵检测系统Snort和防火墙Iptables扩展机制的基础上,描述了两者联动的设计和实现,并对其安全性进行了讨论。     

浅析网络安全技术

论述了网络防火墙安全技术的分类及其主要技术特征。     

网络安全--防火墙

随着更多的计算机和大型网络与因特网的连接,避免网络黑客的入侵已变得日益艰难。而使用防火墙则是一种流行的与网络连接的安全方法。防火墙是一种获取安全性的方法。它在一个受信任的网络（如组织内部网络）和一个不受信任的网络（如因特网）之间设立一个隔离点,并在这两个网络之间提供某一级别的控制来控制两个网络间的交流。利用不同策略保护网络资源的防火墙主要分为四种类型：包过滤型防火墙、应用级网关、电路级网关和规则检     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586