化学铣切槽液中Na2S的分析

本文采用“碘量法”测定化铣液中的硫化钠，分析结果的准确度和精密度完全能够满足生产要求。     

The effect of sulfur on the dissociative adsorption of methane on nickel

The dissociative adsorption of methane was carried out on a Ni(100) surface covered with various amounts of sulfur under the high incident flux conditions of 1 Torr methane. Auger electron spectroscopy was used to measure the rate of carbon buildup and thus to determine the initial methane decomposition rates on the surface. It was shown that the sulfur atoms poison this reaction by a simple site-blocking process. These results are consistent with the activated dissociative adsorption of methane on Ni(100) occurring via a direct adsorption process.     

A/O法废水处理碱源的研究与实践

从理论到实践阐述了以具有价格优势的 Na OH替代 Na2 CO3做碱源 ,解决 A / O法运行成本高的问题。     

带谐波抑制策略的三电平脉冲整流器仿真研究

以城轨牵引供电系统中网侧变流器为研究对象,根据单相三电平脉冲整流器等效数学模型,应用瞬态电流控制策略,加入中点电位平衡策略,给出控制策略数学模型和控制方程.并根据脉冲整流器低次谐波消除原理,对该控制策略下,加入整理器低次谐波消除策略前后,脉冲整流器网侧和直流侧输入输出状态进行仿真研究.     

500kV断路器因空气压力低告警导致断路器控制保护回路断线分析

针对天生桥换流站500kV三菱断路器因空气压力低告警导致断路器控制保护回路断线这一情况,根据工作站中出现的信号,结合断路器的控制、保护二次回路,对信号及其出现的缘由进行分析,评估断路器控制保护回路断线时,可能出现的安全生产风险,发现目前存在的问题,并对这些问题提出解决方案。     

基于西门子S7-300PLC的光纤预制棒温度控制系统的设计

针对光纤制造行业预制棒加热系统温度控制要求,介绍基于西门子S7-300PLC的光纤预制棒温度控制系统的硬件配置、软件流程、人机画面等。     

电力系统继电保护整定计算软件探析

介绍电力系统继电保护整定计算软件的相关问题,着重探讨了对该软件的改进措施.     

Loss of Curing Agent During Thin Film (Droplet) Curing of Thermoset Material

Recently, it has been reported by our group and others^1.2 that loss of curing agent is encountered during the curing of small droplets or thin films of amine cured epoxies. In our earlier study³ results were reported on loss of curing agent in small droplets used in conducting the rnicrobond, single fiber test for determination of interfacial shear strength (ISS). It was reported that use of a volatile curing agent (meta-phenylene diamine (m-PDA) with DGEBA resin) resulted in increasing amounts of curing agent being lost (as measured by T₈ of the cured droplets) with decreasing droplet size during the processing procedure. Droplets smaller than 150 micrometers were seen to lose up to 40% of the curing agent leading to alteration of the mechanical properties of the droplet and, therefore, causing measured values of ISS to be exceedingly low. Use of a less volatile curing agent (Jeffamine 700, a polyether diamine, Texaco Specialty Chemicals) in combination with DGEBA resin produced results which indicated that loss of curing agent was not occuring. This study was undertaken to show the relationships between film (or droplet) size and the amount of curing agent lost (during the processing) for three different aminecured epoxy systems.     

智能化建筑中的计算机科学与技术应用

智能化建筑包含建筑的自动化系统、火灾防控报警系统和通信连接系统。计算机科学与技术应用在建筑中的应用展现建筑的现代化、经济化的要求。本文简单阐述了计算机科学技术应用下智能化建筑的建设理念,充分表现科技在智能化建筑中的管理、维护和系统监控应用。     

物联网环境下企业内部控制环境研究

物联网作为未来的发展趋势之一,将在各个方面决定未来世界和人类社会的发展方向。而自智慧地球、感知中国等战略提出以来,世界各国也纷纷开展物联网领域的规划布局,将物联网建设上升到国家战略。物联网在全世界范围内掀起了继计算机和互联网之后的第三次信息革命浪潮。在这空前火爆的物联网宏观背景下,微观企业也不可避免的受到物联网影响。在这一背景下,通过分析物联网环境对企业内部控制环境的影响。本文认为,物联网环境下企业内部控制环境将更加信息化、虚拟化、智能化。