PTT/PBT共混体系结晶及晶貌形态的研究

通过WAXD，POM对聚对苯二甲酸丙二醇酯（PTT）与聚对苯二甲酸丁二醇酯（PBT）共混物．在非等温条件下结晶度及晶貌形态进行了研究。结果表明，PTT／PBT共混体系的结晶度随着组分含量变化而变化。当PTT，PBT的组分相差很大时，其结晶性能好；当PTT，PBT的组分接近时．其结晶性能差。等温结晶时问及组分含量对晶体的生长有一定的影响。     

Methane Conversion to C2 Hydrocarbons in Solid State Oxide Electrolyte Membrane Reactor

Provskite-type catalysts, Ln0.6Sr0.4FexCo1-x O3 （Ln = Nd, Pr, Gd, Sm, La, 0〈x〈1） and Ln0.8Na0.2CoO3（Ln=La, Gd, Sm） were synthesized, their catalytic properties in the oxidative coupling of methane （OCM） were examined in a fixed-bed reactor. The former group presented higher activity in the OCM, but the main product was carbon dioxide. While the later group showed lower activity but much higher selectivity to C2 hydrocarbons compared with the former. Electrochemical measurements were conducted in a solid oxide membrane reactor with La0.8Na0.2 CoO3 as catalyst. The results showed that methane was oxidized to carbon dioxide and ethane by two parallel reactions. Ethane was oxidized to ethene and carbon dioxide. A fraction of ethene was oxidized deeply to carbon dioxide. The total selectivity to C2 hydrocarbons exceeded 70%. Based on the experimental results, a kinetic model was suggested to describe the reaction results.     

华裔留学生汉语口语教学浅谈

“口语课”是华文教学中一门主要的技能训练课,从分析华裔学生的学习特点入手,通过对华裔学生学习口语时的障碍与难点的剖析,探讨适合他们的教学方法和教学技巧。     

富营养化水体对黑麦草种子萌发及幼苗生长的影响

研究了两处富营养化水体对黑麦草种子萌发和幼苗生长的影响。研究结果表明：当富营养化水体的浓度稀释为原浓度的25％时,其对黑麦草种子萌发无明显影响;浓度高时对种子萌发有抑制作用,100％浓度的抑制作用最为强烈;整个幼苗生长期间,低浓度的富营养化水体能明显促进黑麦草株高的伸长及根系的生长;75％,100％浓度不利于黑麦草地上生物量的积累;两处富营养化水体对黑麦草叶绿素的含量均有明显的促进作用且达到显著水平（P〈0．05）,说明富营养化水体中丰富的N,P元素及一些金属元素,均有利于叶绿素的合成。     

人工神经网络模型在瓦斯预测中的应用

通过对神经网络的基本原理和学习算法的分析,建立了基于瓦斯涌出量预测的BP网络应用模型,采用Delphi编程语言,预测了瓦斯的涌出量,并结合实例进行了验证。     

杂多酸催化合成二丙烯酸乙二醇酯

根据SGA丙烯酸酯胶粘剂主体活性组分的要求,本文研究了杂多酸（HPA）取代硫酸催化合成二丙烯酸乙二醇酯的最佳工艺条件,及钼磷酸（PMo12）对丙烯酸的缓聚机理。     

网络入侵检测发展现状及应用研究

本文对入侵检测的功能和现有的入侵检测系统进行分析,在分析其优点和不足的基础上研究和总结了在网络安全方面入侵检测系统的发展方向。     

Synergistic Effect of Tungstate and Benzotriazole on Corrosion Inhibition of Carbon Steel in Solutions Containing Cl^-

The corrosion inhibition of tungstate, benzotriazole (BTA) and their combination in solutions containing Cl^- was studied by electrochemical techniques. The results indicated that the inhibition efficiency of tungstate was higher than that of BTA. The efficiency increased with increasing concentration of tungstate or BTA. In the studies of synergistic effect of tungstate and BTA, it had been found that in pH 9.0 solution, the largest Rt could be obtained with the concentration ratio of tungstate / BTA being 1 : 1. Lowering the pH value of solution would reduce the efficiency of inhibitors, especially in binary inhibitors. Increasing the concentration of Cl^- accelerated the corrosion of carbon steel in the solutions with various inhibitors, but the influence of Cl^- on corroding rate in binary inhibitors was not so strong as in single component. The results ofsurface analysis showed that W, C, N, O and Fe elements existed in the protecting film formed with binary inhibitors. The thickness of the film was about 12-15 nm.     

基于CORS的地质信息连续采集运行系统的设计

阐述了河南省地质信息连续采集运行系统的建设目标,结构和功能。     

河泥分级连续提取液中CO3^2-与Cl^-的测定

离子色谱作为一种新的分析方法以其独特的优点可广泛应用于水、气、土壤、生物等环境监测领域。DX—120型离子色谱仪,采用浓度淋洗,具有干扰少、简单、快速．样品用量少,灵敏度高,效果好。