Preparation of Nano-pore Insulation Panels Based on Fumed Silica

本文以纳米多孔SiO2粉末和两种玻璃纤维作为原料采用湿法工艺制备不同系列的隔热板，并选择γ-氨丙基三乙氧基硅烷(KH-550)、γ-（甲基丙烯酰氧）丙基三甲氧基硅烷(KH-570)作为表面修饰剂，对所制备的纳米孔隔热板进行表面修饰改性研究。 本文主要研究了制备工艺对试样成型的影响、纳米多孔SiO2粉末和玻璃纤维质量比与材料机械性能之间的关系、SiO2粉末和玻璃纤维质量比与材料隔热性能之间的关系、不同直径的玻纤对材料隔热性能的影响，还研究了表面修饰剂种类与溶液浓度、溶液pH值、修饰时间、修饰温度等因素对试样表面疏水性能的影响。研究发现： 1.制备工艺对试样成型效果影响较大。研究结果表明，制备...In this paper, a series of different mass ratio thermal insulation boards based on fumed silica powder and two kinds of glass fibers was prepared. The boards were modified with γ-Aminopropyl triethoxysilane (KH-550) and γ-Methacryloxypropyl trimethoxysilane (KH-570), respectively. The effects of preparing technology on specimen molding were studied. The optimal preparation parameters were determi...学位：工程硕士院系专业：材料学院_材料工程学号：2072010115005

Studies on Light-Scattering Nephelometic Determination of Sulfate Radical with Polyvinyl Alcohol-Barium Sulphate System

对聚乙烯醇—硫酸钡乳浊体系的共振光散射光谱、二级光散射光谱与反二级光散射光谱的光谱特性进行研究， 并开展了用此体系测定环境水样中硫酸根的应用研究， 3 种散射光谱法在0 ~0-24Mg/Ml的硫酸根浓度范围内的标准曲线均呈良好线性关系.The spectra of resonance light scattering(RLS),double scattering(DS) and anti-double scattering(ADS) for polyvinyl alcohol-barium sulphate system have been studied by using an ordinary spectrofluorophotometer.RLS,DS and ADS have been applied to the determination of sulfate radical in environmental water sample.The results are satisfactory

Resonance Light Scattering Spectra of Mercury Reineche Salt System in a Microemulsion Medium and Its Analytical Properties

研究了微乳液的增稳作用对汞- 雷氏盐乳浊体系的共振光散射（rlS） 光谱， 该体系的rlS光谱强度与浓度成正比， 峰值波长位于400nM 处. 在最佳的测定条件下， 线性范围为0 ~19-2μg/M l， 相关系数r＝ 0-9998 ， 检测限为0-023μg/Ml.This work briefly states the spectra of resonance light scattering(RLS) of mercury reineche salt system in a microemulsion medium.The spectral characteristics,the effect factors and optimum conditions of the reaction have been investigated.The quantitative relationship of the intensities of RLS to the concentration of mercury(Ⅱ) were established

The Determinants of TFP Growth in China:A Comprehensive Analysis Based on BACE Approach

生产率增长是宏观经济研究的一个重要议题。采用经典估计贝叶斯平均(bACE)方法,引入模型的不确定性,在上万次回归的基础上,对众多影响生产率的解释变量按其重要性进行分类和排序。研究发现:在事先列出的16个可能的解释变量中,fdI进入程度、进口依存度、出口依存度、专科以上学历人数占从业人数的比率、相邻地区的生产率(空间邻居变量)以及市场化程度对TfP增长的解释能力最强,并且都具有良好的稳健性。fdI金额、进口额、出口额以及前一期研发投入等四个变量对TfP增长也有一定的解释能力。但各变量在我国东、中、西部地区的影响力存在显著差异。The growth of TFP is an important issue of macro-economics.By using Bayesian Averaging of Classical Estimates(BACE)approach,this paper introduces model uncertainty to classify and order all potential explanatory variables of TFP according to their explanatory ability after thousands of regression.The main conclusions are as follows: of 16 ex-given potential explanatory variables,degree of FDI entry,importation dependence,exportation dependence,human capital level,neighbor region's TFP,the mature degree of market are the most important and robust variables.Another four variables-volume of FDI,import volume,export volume,and former R&D investment also have some explanatory ability.But,their effects on east,middle and west China are different.教育部人文社科基金资助项目“劳动力供给内生化条件下的财政政策与经济增长:理论模型、实证检验与政策模拟”(10YJC790402);博士后科学基金资助项目“我国技术创新与技术进步的推动因素、实现路径与政策选择”(20110490851

一种具有平顶陡边响应的新型谐振腔增强型（RCE）光电探测器的理论分析及模拟

提出了一种适用于波分复用系统的具有平顶陡边响应的新型谐振腔强型（RCE）光电探测器结构，模拟得到了量子效率从峰值下降0.5dB的线宽1.8 nm，10 dB的线宽5.6 nm，20 dB的线宽10.4 nm，量子效率峰值99.7%，几乎没有凹陷的响应曲线