计算机网络安全策略探讨

随着计算机互连网技术的飞速发展,网络技术的应用也变得越来越广泛,由此,网络信息的安全问题也成为当前非常严重的问题,介绍一些常见的网络安全威胁,并针对这些威胁,提出一些常见的网络安全策略,最后提出一种基于主动防御的蜜罐技术。     

粉尘涉爆场所常见安全生产隐患及对策分析

结合目前国内粉尘爆炸的情况,通过对粉尘涉爆企业的现场检查,对粉尘涉爆场所常见安全生产隐患进行归类整理,为粉尘涉爆企业的安全生产及隐患治理提出了建议。     

防爆电机产品相关标准实施带来的新要求

主要通过对国家标准GB 18613-2006和GB 3836-2010系列标准中相关条款的介绍,论述了标准实施过程中对防爆电机行业带来的新要求.     

直接空冷机组空冷岛优化运行研究

通过对直接空冷机组空冷凝汽器和冷却风机性能的研究,建立了空冷岛系统运行性能的计算模型,得出在不同环境温度、冷却风速和机组负荷下凝汽器性能的热力特性曲线。根据空冷风机的运行方式,提出机组空冷岛运行优化模型,并针对600 MW直接空冷机组空冷岛进行了性能和优化计算,给出了空冷岛系统冷却风机的优化运行方式和最佳背压。     

Chemical stability and electrical property of Ba_(1.03)Ce_(0.6)Zr_(0.2)Yb_(0.2)O_(3-α) ceramic

Ba1.03Ce0.6Zr0.2Yb0.2O3-α ceramic was prepared by solid state reaction. Phase composition, surface and cross-section morphologies of the material were characterized by using X-ray diffractometer (XRD) and scanning electron microscopy (SEM), respectively. Its chemical stability against carbon dioxide and water steam at high temperature was tested. Ionic conduction of the material was investigated by ac im-pedance spectroscopy and gas concentration cell methods under different gas atmospheres in the temperature range of 500-900 ℃. Using the ceramic as solid electrolyte and porous platinum as electrodes, the hydrogen-air fuel cell was constructed, and the cell performance at the tem-perature from 500 to 900 oC was examined. The results indicated that Ba1.03Ce0.6Zr0.2Yb0.2O3-α was a single-phase perovskite-type ortho-rhombic system, with high density and good chemical stability under carbon dioxide and water steam atmospheres at high temperature. In wet hydrogen, the material was a pure protonic conductor with the protonic transport number of 1 from 500 to 700 ℃, a mixed conductor of pro-ton and electron with the protonic transport numbers of 0.945-0.916 from 800 to 900 ℃. In wet air, the material was a mixed conductor of proton, oxide ion and electronic hole. The protonic transport numbers were 0.013-0.003, and the oxide ionic transport numbers were 0.346-0.265. Under hydrogen-air fuel cell conditions, the material was a mixed conductor of proton, oxide ion and electron, the ionic trans-port numbers were 0.945-0.848. The fuel cell could work stably, and at 900 ℃, the maximum power output density was 36.5 mW/cm2.     

山东某金矿中部矿石选矿试验研究

通过条件试验和流程试验,确定采用一粗二扫一精的工艺流程。磨矿细度为-0.074mm占53.71%,异戊基黄药用量为183.3g/t,丁胺黑药用量为36.7g/t,11号油用量为65g/t,为选矿厂生产流程的设计提供了理论依据。经过闭路流程试验研究,在金精矿品位102.46g/t的前提下,将金的回收率提高至95%以上,选别效果较为明显。     

反硝化过程中亚硝酸盐积累特性分析

在分段进水工艺处理城市废水实现深度脱氮(TN＜5 mg·L-1)研究中,采用SBR反应器,分别以甲醇或葡萄糖为碳源研究了反硝化过程中亚硝酸盐(NO2--N)的积累情况、pH和ORP变化规律及动力学特性.结果表明,2种碳源系统、不同碳氮比(C/N)条件下反硝化过程均出现明显的NO2--N积累.相同C/N下,在NO2--N...     

基于数据手套的机械手移动与抓取过程的动态仿真分析

人机交互是虚拟现实的关键技术,本文利用数据手套驱动虚拟机械手移动与抓取过程。首先构建了基于数据手套的机械手交互系统实验平台,通过MEMS传感器获取机械手运动轨迹,然后基于VC＋＋ MFC程序界面创建了虚拟环境并对机械手移动与抓取过程进行动态仿真,实现虚拟机械手按照操作者的指令实时地完成移动和物体抓取等动作。     

膨润土对氰化贫液中各离子的吸附

研究膨润土对高浓度氰化贫液中各离子的吸附作用,考察了温度、pH、吸附时间、膨润土用量等对吸附效果的影响。结果表明,膨润土吸附氰化贫液的最适宜的工艺条件为:膨润土投加量10g/L、时间40min、溶液温度25℃、氰化贫液pH=10(即氰化贫液的初始pH)。氰、铜和锌3种离子的吸附率分别达到56%、55%和93%。     

内外径比值对横向效应侵彻体的影响分析

通过研究不同内外径比值对PELE横向效应的影响,对不同内外径比情况弹丸侵彻靶板的过程进行数值仿真.结果表明:任意一种类型横向效应侵彻体,其消耗的能量随着内外径比值的增大而增大;对于一个设定的内外径比,总有一个最佳长径比值使其横向效应效果最优.