毛细管气相色谱法研究胆固醇热降解及其动力学特征

应用毛细管气相色谱法考察了不同温度和加热时间胆固醇的热降解情况。实验表明１３３℃以下４０ｍｉｎ不发生降解反应，１８３℃加热１０ｍｉｎ有６１．９％的胆固醇被降解，初步判断降解反应对胆固醇为一级反应。     

毛细管电泳技术及其在药物分析中的应用

本文综述了毛细管电泳（包括区带电泳和胶束电动色谱）的基本原理及其在药物分析中的应用。主要参考文献６０篇。     

直角平面彩色显象管荫罩的曲面拟合及数值计算

讨论了直角平面彩色显象管用荫罩曲面的拟合方法，导出了具体的计算公式，进行了理论分析，得出了满足的结果，表明文中提出的方法适用于测试荫罩曲面后能拟合出准确的计算式中的各项系数，其误差远小于荫罩成型模制作时的公差要求。     

振荡管管壁轴向导热的试验研究

对振荡管管壁的轴向导热进行了实验研究，提出了一定振荡频率和膨胀比下隔阻客壁轴向导热对振荡管等熵制冷效率及管内流动的影响规律，结果表明；隔阻振荡管冷、热端管壁的轴向导热、使管内激波幅值增大，激波形成点后移，等熵制冷效率有显著提高。     

水平二维内微肋管内凝结两相流的流型实验

通过实验研究，从工程应用角度和流型转变控制机理考虑，将水平二维内微肋管内的凝流型分为三区即：环状流，分层流与间歇流。通过解析法得到流型转变的判据和流型图。与作者所做实验数据吻合。     

泡沫填充圆管的轴向压缩能量吸收特性

建立了泡沫填充圆管在准静态轴向压缩载荷作用下的吸能特性分析模型,分析了材料参数、几何参数对其比吸能(单位质量吸收的能量)的影响,并对其结构参数进行了优化。研究结果表明:泡沫填充圆管具有很好的吸能能力;泡沫材料的相对密度对比吸能有显著的影响,相对密度取适当值可使比吸能最大。另外,提高构成泡沫的实体材料的强度可有效地提高比吸能。     

精密播种机输种管的研究

针对保护性农业技术要求，通过对现有播种机输种管的分析，研究播种机排种器较高时，对输种管的影响，根据种子的运动轨迹及外在条件，探索输种管设计的理论依据。     

Rapid eutectic growth during free fall

Rapid eutectic growth of Sb-24%Cu alloy is realized in the drop tube during the free fall under the containerless condition. Based on the analysis of crystal nucleation and eutectic growth in the free fall condition, it is indicated that, with the increase of undercooling, microstructural transition of Sb-24%Cu eutectic alloy proceeds from lamellar to anomalous eutectic structure. Undercoolings of 0 –154 K have been obtained in experiment. The maximum undercooling exceeds to 0.19T_e. Calculated results exhibit that Cu₂Sb compound is the primary nucleation phase, and that the primary Sb dendrite will grow more rapidly than the eutectic structure when undercooling is larger than 40 K. The eutectic coupled zone around Sb-24%Cu eutectic alloy leads strongly to the Cu-rich side and covers a composition range from 23.0% to 32.7%Sb.     

High undercooling and rapid dendritic growth of Cu-Sb alloy in drop tube

Droplets of Cu-20%Sb hypoeutectic alloy has been rapidly solidified in drop tube within the containerless condition. With the decrease of droplet diameter, undercooling increases and the microstructures of primary copper dendrite refines. Undercooling up to 207 K (0.17 T _L) is obtained in experiment. Theoretic analysis indicated that because of the broad temperature range of solidification, the rapid growth of primary copper dendrite is controlled by the solutal diffusion. Judging from the calculation of T₀ curve in the phase diagram, it is shown that the critical undercooling of segregationless solidification is δT ₀ = 474 K. At the maximum undercooling of 207 K, the growth velocity of primary copper phase exceeds to 37 mm/s, and the distinct solute trapping occurs.     

三电极26mm全静电摄像管设计与研究

采用计算机辅助设计,分析了三电极结构全静电摄像管的结构参量和电参量对扫描电子束的聚焦、偏转等电子光学特性的影响。设计出26 mm(1英寸)全静电摄像管,并制成了3只试验样管。经测试,400电视行时的中心调制度可达40％,畸变小于1％,信号均匀,没有阴影。讨论了进一步提高其性能的可能途径。