中间馏分油型加氢裂化催化剂用沸石的研究

通过水热处理法制备了3个不同脱铝深度的改性Y沸石，再经浸渍法制成中间馏分油型加氢裂化催化剂，在200mL小型加氢裂化装置上进行了催化性能评价。试验结果表明，除了沸石的酸性外，其孔结构和比表面积对催化剂的活性、中间馏分油选择性和液体收率都有很大的影响，为最大幅度提高催化剂的中间馏分油选择性并保持较好活性，要求沸石具有较低的酸量、较高的比表面积和较多的二次孔及适量的L酸量。     

硼／铝复合材料管构件的界面特性EI

主要研究带钛合金连接头硼／铝复合材料管构件中Ｂ－Ａｌ－Ｔｉ间的界面结构与性质。研究表明，在复合工艺条件下，硼－铝界面附近没有检测到任何铝－硼化合物，而钛－铝间形成ＴｉＡｌ有序金属间化合物相。实验证明，硼／铝复合材料与铝合金端环之间采用的固结方法是有效的，且可按照受载类型随意调整斜面搭接长度，达到承受不同载荷的目的。     

WC对Cu/WC_P复合材料性能及组织的影响

通过ＷＣ含量对ＷＣ／Ｃｕ复合材料性能的影响，确定了冷压－烧结法制备Ｃｕ／ＷＣ材料的适宜ＷＣ含量为１０ｖｏｌ％左右。并就ＷＣ对该材料组织和再结晶行为的影响进行了有益的探讨。     

氧化铝/锌合金复合材料界面的SEM观察

利用挤压铸造制备氧化铝／锌合金复合材料，在扫描电镜（ＳＥＭ）上观察复合材料的界面。结果表明，在复合材料中纤维与基体间存在致密界面层，合金元素通过适当的化学反应可改善纤维与基体间的结合；在凝固过程中，纤维／基体界面上的硅在共晶体的共生生长过程中起了领先相作用，导致复合材料的共晶转变是由铝硅共晶转变和锌铝共晶转变两者组成。     

壳聚糖／聚丙烯酸钠聚离子复合膜的醇－水渗透汽化分离性能

研究了壳聚糖－醋酸溶液与聚丙烯酸钠溶液形成的复合膜用于水－乙醇混合物的渗透汽化分离，在膜组成Ｃ＝０．８０时，分离系数出现最大值，对异丙醇－水体系的分离系数为∞。溶解－扩散过程对渗透汽化过程起着重大作用。由－ＮＨ＋３…ＯＯＣ－交联的聚离子复合膜对醇－水体系具有稳定的分离性能。     

Modelling aerodynamic sound in the airways of a human body: A possible diagnostic tool

The sound generated aerodynamically by a pillow-like body simulating an obstacle in the human airway is observed through a soft wall from outside the duct. It is intended to provide a physical basis for an attempted medical diagnostic technique for detecting an obstacle by observing the sound during breathing. So far at least two kinds of sound have been identified: One is sound of the half-jet flow formed downstream of the obstacle, and the other is sound due to unsteady motion of the separation point on the curved surface of the obstacle. For simulating the flow condition downstream of the vocal cords during inhalation, cases with an obstacle at various positions relative to a jet flow are also examined. In this case, the sound due to the downstream obstacle exhibits a complicated dependence on the geometry and flow parameters. Nevertheless, increase in the sound, or more correctly, deformation in the sound power spectrum, due to the presence of an obstacle is detectable from outside, opening up possibilities of its use as a diagnostic aid. Dedicated to the late Professor Itiro Tani on the occasion of 5ACFM, Taejon, Korea     

单轴-平面W型复合锶铁氧体的制备及其吸波特性研究

用草酸盐共沉淀和微量掺杂法研制六角晶系W型Ni,Zn,Co,Al多元复合锶铁氧体，通过调节Ni2W同Co2W的摩尔比例，可使该种铁氧体易磁化方向从C单轴型向垂于C轴的平面型转化，控制置换锶铁氧体中部分Fe3 的微量掺杂Al3 ，可以调整4πMs值，提高磁晶各向异性场，测试分析了5种不同含Co量的W型复合锶铁氧体粉料涂层的吸波特性，发现其自然共振吸收峰随Co含量增加向低频方向偏移，最高吸收峰可达32．8dB，是适用于电子隐形技术的高品位的微波吸收剂。     

A damage identification technique for CF/EP composite laminates using distributed piezoelectric transducers

In this study, a damage identification approach was developed for carbon fibre/epoxy composite laminates with localized internal delamination. Propagation of the Lamb wave in laminates and its interaction with the delamination were examined. The fundamental symmetric Lamb wave mode, S₀, and the lowest order shear wave mode, S₀^′, were chosen to predict damage location. A real-time active diagnosis system was therefore established. This technique uses distributed piezoelectric transducers to generate and monitor the ultrasonic Lamb wave with narrowband frequency. The two-way switches were employed to minimize the number of transducers. A signal-processing scheme based on the time–frequency spectrographic analysis was utilised to extract useful diagnostic information. Also, an optimal identification method was applied on damage searching procedure to reduce errors and obtain the diagnostic results promptly. Experiments were conducted on [0/−45/45/90]_s CF/EP laminates to verify this diagnosis system. The results obtained show that satisfactory detection accuracy could be achieved.     

HL-1M装置的真空运行与质谱诊断

通过对 HL- 1M装置真空运行模式、真空运行参数、氦辉光放电清洗和硅化壁处理手段等的规范化 ,显著地改善了装置的真空壁出气、本底杂质浓度、托卡马克放电杂质出气比和再循环 ,成功地实现了高参数放电、长脉冲放电和装置暴露大气后快速恢复放电 ,并成功地为演证低混杂电流驱动、离子回旋共振加热、电子回旋共振加热、中性束注入、弹丸注入和分子束注入实验和升级等离子体运行等提供了良好的真空壁条件。描述了 HL- 1M装置真空系统、壁出气和再循环控制、质谱诊断和程序脉冲送气等方面的主要实验成果 ,并为 HL- 2 A装置的真空系统研制和运行提供了有益的参考     

化学镀Ni-P合金/TiO2复合膜的耐蚀性研究

在改进常规制备方法的基础上，提出化学镀/溶胶-凝胶复合法在碳钢表面制备TiO2复合膜的新技术。用衍射研究了复合膜的组织形态，采用环境扫描电镜（ESEM）表征了复合膜的表观和断面形貌，用极化电阻、阳极极化曲线测量等方法研究TiO2复合膜在0.5mol/L硫酸和0.5mol/L氯化钠溶液中的耐蚀性能。结果表明A3钢表面的TiO2复合膜耐蚀性能优良。