微波频率下乙酸乙酯皂化反应等效介电系数的实验研究

微波化学研究中的关键问题之一是对化学反应过程中的介电系数进行跟踪和测量.本文采用开槽同轴谐振探头首次测量了乙酸乙酯皂化反应对微波的反射系数,并用遗传算法获得了微波频率下该反应的等效介电系数.结果发现等效介电系数实部随温度的变化趋势符合L Onsager和Debye理论对极性混合溶液的描述;等效介电系数虚部因极化损耗和欧姆损耗随温度变化而相应变化;而等效介电系数实部随时间的变化与L Onsager极性混合溶液等效介电系数理论的描述相反.     

EPS外墙外保温施工及裂缝防治措施

本文介绍EPS外墙外保温的施工工艺及裂缝防治措施。     

高灵敏度溶液介电常数测量探头

文中提出一种适用于溶液介电常数测量的高灵敏探头。采用时域有限差分(FDID)分析其电磁场分布及测量端口反射系数与溶液介电常数的关系。通过实验测量证明该探头对溶液的介电常数变化敏感，经数值计算反演介电常数与Debye公式计算结果相吻合。     

A Study on the Kinetics of the Europium Electrochemistry Reduction (Ⅱ)——The Europium Electroreduction Kinetic Properties

This article studied the europium electroreduction kinetic properties in the Sm-Eu-Gd chloridesystem by using an electrolytic cell with membrane and constant potential method.The results indicate thatwithin the parameter range of this study the europium reduction speed up with the increase of the system'stemperature,the stirring intensity,feed concentration and the cathod area,and with the decrease of thecathodic potential.As the feed acidity increases,the reduction rate decreases.An empirical formula foreuropium's electroreduction kinetics in this experimental condition is also given.     

退煮漂一浴法工艺探讨

作者经过大小样试验分析了退煮漂的共性因素和双氧水具有的多种作用,认为退煮漂一浴法工艺可以实现,但只要合理选择好强碱浴中双氧水稳定剂和严格控制工艺条件,才能使织物质量达到常规工艺水平。     

大跨度工业厂房钢结构安装施工技术

针对本工程钢结构均由台湾加工,上海拼装的特点,制定了相对应的安装工艺流程及拼装、安装要点、质量控制措 施,取得了良好的综合效益。     

A Study on the Kinetics of the Europium Electrochemistry Reduction 1.The Polarization Properties of Europium Reduced at the Cathode

This article studies the polarization properties of the cathode reduction of Eu in the Sm-Eu-Gdchloride system by using a constant potential method.As the feed concentration,temperature,and stirringrate of the system change,the system can gradually turn from chemical polarization to concentrationpolarization,and there would be a higher limiting current.As to the effects of acidity,only at a rather higherpH there will be a typical polarization property.The study can give some bases for the Eu electroreductiontechnlolgy parameter selection.     

超大面积现浇钢筋混凝土楼盖一次成形施工技术

根据国外顶级规范的标准和要求,对特大面积的现浇钢筋混凝土楼盖采取了多种技术措施,保证了楼盖一次成形的质量     

30％TBP(煤油)/UO_2(NO_3)_2-HNO_3-H_2O分散体系电导的研究

在感兴趣的铀、酸浓度范围内,以水相为连续相,有机相为分散相的分散体系的电导主要受酸度、铀浓度、温度及有机相存留分数的影响;混合强度对电导影响很小。TBP-煤油溶液为非极性溶剂,即使萃入较高浓度的铀和酸,其电导的绝对值仍然很小。比同样铀、酸浓度的水溶液的电导小5个数量级。