计算机网络泄密的分析与对策

网络环境下计算机泄密问题越来越严重。详细分析了计算机网络泄密的主要方式，并提出相应的防范措施。     

关于网络安全防护的几点思考

针对近年来频繁发生的网络泄密事件,分析了泄密的主要途径;根据不同的网络泄密方式,提出了对应的防范措施和手段。     

计算机安全隐患及对策

指出了计算机信息安全所面临的威胁,认为人为泄密、网络泄密、信息设备泄密、存储介质泄密、娱乐器材泄密是计算机泄密的主要原因;加强管理,提高保密意识是杜绝泄密的根本;实现保密器材与互联网的物理隔绝是杜绝泄密的重要保证。     

Check Point推出全新数据防泄密方案

近日，Check Point宣布推出全新基于网络的“数据防泄密”；解决方案（DLP），它能预防机密及专有敏感信息的无意泄密，协助企业对数据泄密由检测转为预防。     

有关计算机网络安全的探讨

随着计算机网络的高速发展,计算机泄密安全问题已经越来越严重,文章中主要讨论了几种计算机网络泄密的主要方式,并就其特点提出了几点防范措施.     

防止计算机网络泄密的措施分析

随着信息化技术的不断发展,计算机网络也得到了广泛应用,为人们的工作和生活带来了很大便利。然而,近几年来的计算机网络泄密事件层出不穷,计算机网络安全成为各行业普遍关注的问题。从计算机网络的安全问题的角度出发,对计算机网络泄密的途径和原因进行了分析,并针对如何防止网络泄密,提出了相应的防范措施,防止了重要资料的泄露,为网络安全提供了有效的保障。     

浅议计算机网络泄密主要方式及安全防范措施

网络技术的广泛应用和网络规模的迅速扩展使我们的生活越来越离不开网络，但也同样使得计算机网络泄密问题越来越普遍和严重。     

防范Cookie泄密的一些对策

探讨了Cookie的概念、传递流程及其利用问题,分析了Cookie泄密的现状和机理,给出了防范Cookie泄密、维护网络隐私安全的一些策略。     

从法律视角看网络泄密

随着互联网用户的剧增,网络安全成为困扰中国互联网健康发展的重要问题之一。与此同时,日趋严重的网络泄密问题已逐渐成为与黑客入侵、病毒袭击、垃圾邮件、流氓插件并行的第五大网络安全隐患．从法律角度来看,网路泄密实质上是对网络隐私权的侵犯,笔者通过对网路隐私权的分析,从现行法律制度与未来法律制度来解读网络泄密。     

刊首语

在央视3.15晚会后，很多朋友都相互询问银行卡泄密的事情。当我们都已经习惯了网络购物时，银行卡的安全性更加受到人们的重视，而3.15晚会所揭露的安全隐患的确让很多喜欢在网络上“血拼”的购物者害怕。     

火电厂锅炉吹灰程控网络系统设计及调试

本文介绍了Modbusplus和Modbus现场总线的特点及其在某火电厂锅炉吹灰程控PLC系统网络设计中的应用,重点阐述了单台锅炉吹灰程控PLC系统的构成和5台锅炉吹灰程控PLC系统的通信网络构成以及该网络系统的调试步骤。     

基于ProfiBUS现场总线的汽车涂装线网络自动控制系统

本文介绍了中央网络控制与ProfiBus—DP分布式现场总线以及午身信息识别控制相结合的汽车生产线过程自动控制系统的设计与应用,给山系统结构、工作原理以及硬件和软件设计方法,实现了对汽车车身涂装生产过程中电泳、喷漆、烘干以及空调送风等各个工艺过程和车身信息识别的网络自动控制。     

双联冶炼转炉底吹强度测量与控制仪表分析

顶底复吹转炉底吹强度对炼钢品质具有较大影响。双联冶炼脱磷转炉由于底吹强度范围大,对测量与控制仪表的性能要求较高。文章针对双联冶炼转炉的底吹供气流量测量和控制的仪表设计选型进行了分析。     

薄膜吹塑设备控制系统的设计与实现

自动化、智能化的控制系统已成为薄膜吹塑设备基本要求,介绍一种采用PLC、温度控制模块、人机界面、变频器组成的高性价比控制系统,包括整体方案设计,软硬件规划,具体实施及开发过程注意事项,系统实际运行稳定可靠,开发周期短.     

Aerodynamic drag reduction on a realistic vehicle using continuous blowing

The aerodynamic drag reduction of a realistic vehicle model through continuous blowing was numerically analyzed based on the open-source computational fluid dynamics (CFD) program, OpenFOAM. Simulations were performed on a realistic passenger vehicle model with available wind tunnel test data, DrivAer, at four different Reynolds numbers (Re). The aerodynamic drag coefficient decreased with increasing Re. The CFD technique was validated by comparing the aerodynamic drag coefficients at Re = 4.87 × 10⁶. Predicted drag coefficients of the DrivAer estate model show less than 3% difference from wind tunnel test data, whereas those of fastback and notchback vehicles showed less than 1% difference. Sectional pressure distributions agreed well with wind tunnel test data. The effect of continuous blowing was investigated using the DrivAer estate model with a blowing position at the end of the roof for vertical blowing and at the C-pillar for lateral blowing. Simulations were performed at Re = 4.87 × 10⁶ and 9.75 × 10⁶ and blowing speeds of 20%, 40%, 60%, and 100% of the vehicle driving speed. The effect of continuous blowing increased with Re. The drag reduction was more than 6% for roof blowing due to increasing rear pressure when the blowing speed equaled the vehicle driving speed. The maximum drag reduction was approximately 7.5% for simultaneous roof and lateral blowing. The results indicate that continuous blowing can efficiently reduce vehicle aerodynamic drag and consequently greenhouse gas emissions.

     

双联冶炼转炉底吹强度测量与控制仪表分析

顶底复吹转炉的底吹供气强度对炼钢品质有着较大的影响。双联冶炼脱磷转炉由于底吹强度范围大,对测量与控制仪表的性能要求较高。该文针对双联冶炼转炉的底吹供气流量测量和控制的仪表设计选型,对解决方案进行了分析。     

DNS for flow separation control around an airfoil by pulsed jets

Direct numerical simulation (DNS) for flow separation and transition around a NACA-0012 airfoil with an attack angle of 4° and Reynolds number of 100,000 has been reported in our previous paper. The details of flow separation, formation of the detached shear layer, Kelvin-Helmholtz instability (inviscid shear layer instability) and vortex shedding, interaction of nonlinear waves, breakdown, and re-attachment are obtained and analyzed. The power spectral density of pressure shows the low frequency of vortex shedding caused by the Kelvin-Helmholtz instability still dominates from the leading edge to trailing edge. Based on our understanding on the flow separation mechanism, we try to reveal the mechanism of the flow separation control using blowing jets and then optimize the jets. DNS simulations for flow separation control by blowing jets (pulsed and pitched and skewed jets) are reported and analyzed. The effects of different unsteady blowing jets on the surface at the location just before the separation points are studied. The length of separation bubble is significantly reduced (almost removed) after unsteady blowing technology is applied. The mechanism of early transition caused by the blowing jets was found. A blowing jet with K-H frequency, sharp shape function (very small mass blowing), pitching and skewing obtained the best efficiency based on the increase of the ratio of lift over drag and decrease of blowing mass flow. In this work, a DNS code with high-order accuracy and high-resolution developed by the computational fluid dynamics group at University of Texas at Arlington is applied.     

基于B/S架构的火电机组受热面积灰监测及吹灰优化系统平台

为实现火电机组按需吹灰,采用Visual Studio 2015开发工具及MySQL数据库管理系统,基于B/S架构设计并搭建了火电机组受热面在线积灰监测及吹灰优化系统平台并且成功在某600MW机组实现。该系统实现了实时在线监测锅炉各级受热面的积灰状态,进而通过吹灰优化模型给出吹灰建议,为电厂运行人员提供运行指导与参考。     

基于PSO优化SVM的转炉炼钢用氧量预测研究

用氧量是影响钢水质量的主要因素之一,为提高转炉炼钢用氧量模型的预测精度,提出基于PSO优化SVM的吹氧量建模预测方法。针对SVM结构参数依据经验选取,致使预测模型的泛化能力差,在标准PSO算法的基础上,优化SVM的惩罚系数、不敏感损失系数和高斯核宽度系数3个结构参数,并建立转炉炼钢用氧量预测模型;在此基础上利用UCI数据库中的Auto-MPG标准数据,验证了方法的有效性;最后以某钢厂100 t转炉的实际生产数据建立吹氧量预测模型,结果表明,与标准BP、RBF及SVM相比,基于PSO优化SVM的转炉炼钢吹氧量预测模型精度高、泛化能力强。