16信道0.35μmCMOS/VCSEL光发射模块

研究了垂直腔面发射激光器 (VCSEL)及其列阵器件的光谱特性、调制特性、高频特性及与微电子电路的兼容性 ,将 1× 16的VCSEL与CMOS专用集成电路进行多芯片组装 (MCM ) ,混合集成为 16信道VCSEL光发射功能模块 .测试过程中 ,功能模块的光电特性及其均匀性良好 ,测量的 - 3dB频带宽度大于 2GHz.     

土壤冲击特性的实验研究

本文利用分离式Hopkinson压杆研究了土体在不同应变率条件下的冲击动态力学性能，发现土体有明显的应变率效应，与静载相比，冲击荷载下土的动强度和动模量均有很大的提高。     

一种基于数字电路的纳秒级脉冲产生方法

介绍了超宽带无线电的基本概念和技术特点,对几种典型的超宽带窄脉冲产生方法进行了描述和比较,提出了一种采用数字电路实现超宽带纳秒级窄脉冲的新方法,叙述了电路的基本原理和核心器件的主要性能,给出了电路结构,并对试验电路进行了测试。最后给出了测试结果并对测试结果进行了分析,得出了相关的结论。     

基于AFM的微结构加工实验研究

本文建立了微动工作台和原子力显微镜相结合的微加工系统，在该系统上采用金刚石针尖进行微加工实验，与SPI系统本身的刻划软件刻划出的图形进行了比较分析，得出这个系统适合微结构的加工；并给出了采用该方法加工的1111面及多边形面微结构；还分析了金刚石针尖几何角度及SPM和工作台的相关参数对加工的影响。     

声诱饵仿真试验系统

介绍了声诱饵仿真试验系统的组成、工作原理、对接装置结构等,建立了对接装置声耦合状态下的数学模型,对近场声压分布进行了仿真计算,得出了匹配材料厚度、发射和接收换能器的选取原则。     

Effects of a K+ATP channel opener, lemakalim, on systemic, coronary and regional vascular dynamics in conscious dogs: comparison with nifedipine, adenosine, nitroglycerin and acetylcholine

The systemic, coronary and regional vascular responses to the K+ATP channel opener lemakalim were compared to other potent vasodilators (i.e., nifedipine, adenosine, nitroglycerin and acetylcholine). Experiments were performed in 12 conscious dogs 2 to 4 weeks after implantation of aortic catheters and flow probes on the ascending aorta, left circumflex coronary, celiac, mesenteric, renal and iliac arteries, and solid-state miniature pressure gauges in the left ventricular cavity. Dose-response curves induced by bolus injection (i.v.) were examined. For doses that reduced total peripheral resistance by 22%, lemakalim reduced celiac (-28 +/- 2%), mesenteric (-24 +/- 3%), renal (-17 +/- 3%) and iliac (-18 +/- 3%) vascular resistances (i.e., by amounts similar to those observed with the other vasodilators, except for adenosine, which increased renal resistance). At these doses, lemakalim induced a greater decrease (-52 +/- 3%) (P < .05) in coronary resistance, as compared with nifedipine (-35 +/- 3%), adenosine (-38 +/- 3%), nitroglycerin (-25 +/- 2%) and acetylcholine (-32 +/- 3%). However, when near maximal vasodilation was elicited, adenosine elicited the greatest (P < .05) decrease in coronary resistance (-81 +/- 1%), as compared with lemakalim (-74 +/- 2%), nifedipine (-67 +/- 2%), nitroglycerin (-63 +/- 2%) and acetylcholine (-72 +/- 1%). Both the time to maximal increases in regional blood flow and the time for recovery in all vascular beds were significantly prolonged for lemakalim compared with the other vasodilators. Thus, the K+ATP channel opener lemakalim dilates the coronary bed out of proportion to other vascular beds, is relatively more potent at lower doses than other vasodilators and exhibits a delayed and more prolonged action in all regional vascular beds.     

R-Calculus for ELP:An Operational Approach to Knowledge Base Maintenance

Sme concepts used in knowledge base maintenace,such as sequence,new law,user‘s rejection and reconstructions of a knowledge base,are first introduced,and then a framework for extended logic programming(ELP)is given,where an extended logic program is equivalent to a knowledge base.A transition system called R-calculus for ELP is provided.For a given knowledge base and a user‘s rejection,the R-calculus for ELP will deduce best revisions of the base.The soundness and the completeness of the R-calculus for ELP are proved,and the R-calculus for ELP is implemented in Prolog.In addition,the research is compared with other relevant work.     

心电地图仪中工频干扰的一种滤除方法

在心电地图仪中记录到的体表心电信号往往由于电磁的影响而引进工频干扰．基于体表心电信号中工频干扰的特点，作者提出了一种滤除工频干扰的方法，即就单独—胸导联信号通过提高频谱的分辨率来估计工频干扰的频率；基于最小均方误差准则来估计各导联信号中工频干扰的幅度和相位。文中还给出了该算法的流程图和滤波性能分析。模拟结果表明了该算法的有效性。应用该算法对心电地图仪中的工频干扰进行对消，取得了满意的结果。     

对分布式数据库发展方向的分析

本文对分布式数据库的设计方法、分割与分配技术作了一些探讨，并就分布式数据库的发展方向进行了初步分析。     

堇青石基玻璃陶瓷的制备与展望

介绍了制备堇青石基玻璃陶瓷的三种方法：熔融法、烧结法和溶胶-凝胶法，综述了玻璃组成、添加剂和成核剂对堇青石基玻璃陶瓷的烧结及性能的影响，并对其未来的发展进行了展望。