高性能片式多层氧化锌压敏电阻器材料研究

对非Bi系氧化锌压敏电阻材料进行了系统研究。研究结果表明:在ZnO基体材料中,添加适量PbO、Co2O3、Cr2O3、MnO2、ZrO2、TiO2、Sb2O3 、B2O3等非Bi系添加剂,采用传统陶瓷制备工艺和合适烧结工艺,可获得a >50、IL<1 mA、烧结温度低于1 100℃的实用非Bi系氧化锌电阻瓷料。采用该瓷料,利用MLC工艺,选用Pd30/Ag70电极浆料,制作出V1mA<30 V、a >30、IL<1 mA的片式多层压敏电阻器。     

转动玻璃圆筒激光器

本文介绍了转动玻璃圆筒激光器的设计及实验结果,得到了脉冲能量为13J,重复频率为15Hz的激光输出。电光转换效率为2.2％,斜效率为3.4％。     

供水工程输水隧洞钻爆设计与施工

介绍了采用钻焊法开挖深圳市东部供水工程输水隧洞的掏槽方式，光面爆破参数，装药结构及钻爆作业安排等参数。在近4年的工程实践中，取得了良好的爆破效果和明显的经济效益。     

催化裂化干气回收乙烯用于制备环氧乙烷的研究

叙述了在YS型银催化剂作用下，利用催化裂化干气回收的乙烯制备环氧乙烷的实验研究。结果表明：在银催化剂上催化氧化生成环氧乙烷的过程中，使用回收的乙烯，催化剂的初选择性可达80％；在保持环氧乙烷时空产率不变，经过2000h催化剂稳定性试验后，选择性下降了3—4个百分点，反应温度上升约10℃，与用聚合级乙烯为原料进行比较，催化剂初选择性低2—3个百分点、稳定性略差。该结果为用回收乙烯生产环氧乙烷提供了试验依据。     

Preparation and gas-sensing characteristics of nanocrystalline spinel zinc ferrite thin films

Zinc ferrite is a promising sensor material. In this paper, thin films of nanocrystalline zinc ferrite were deposited on alumina substrates by nebulization of a 0.01-M solution of a mixture of ZnCl/sub 2/ and FeCl/sub 3/ in ethanol (Zn:Fe=1:2) followed by pyrolysis and annealing in flowing air. The resulting films were characterized by X-ray diffraction and scanning electron microscopy, and the gas-sensing properties of as-deposited films were also investigated.     

基于网络的家电产品故障诊断系统研究

介绍了基于网络的家电产品故障诊断系统的硬件拓扑结构、软件平台及系统开发。系统在硬件上采用了多种网络平台搭建方式及综合连接技术，软件上采用了IDRS诊断模型和基于事例的最新诊断技术。这也是诊断研究和应用的新领域。     

A practical SPICE model based on the physics and characteristics of realistic single-electron transistors

A practical model for a single-electron transistor (SET) was developed based on the physical phenomena in realistic Si SETs, and implemented into a conventional circuit simulator. In the proposed model, the SET current calculated by the analytic model is combined with the parasitic MOSFET characteristics, which have been observed in many recently reported SETs formed on Si nanostructures. The SPICE simulation results were compared with the measured characteristics of the Si SETs. In terms of the bias, temperature, and size dependence of the realistic SET characteristics, an extensive comparison leads to good agreement within a reasonable level of accuracy. This result is noticeable in that a single set of model parameters was used, while considering divergent physical phenomena such as the parasitic MOSFET, the Coulomb oscillation phase shift, and the tunneling resistance modulated by the gate bias. When compared to the measured data, the accuracy of the voltage transfer characteristics of a single-electron inverter obtained from the SPICE simulation was within 15%. This new SPICE model can be applied to estimating the realistic performance of a CMOS/SET hybrid circuit or various SET logic architectures.     

中温换热器检查及修复方案

经分析认为中温换热器缺陷出现的主要原因是H2 S腐蚀。采取更换短管以及补焊上段下管板的措施进行修复 ,取得了满意的效果     

Autolisp在开发V画面体视图自生成系统中的应用

介绍了近年来体视投影技术的应用及发展，并提出了用AutoCAD的内嵌开发工具Autolisp语言结合Visualisp中的对话框控制语言DCL来开发体视图自动生成系统的新思路．根据V画面体视投影原理，推导出了V画面体视变换矩阵．给出了该系统的程序流程框图及相应的功能模块．并将该系统的界面和基本功能进行了展示，从而为体视自生成技术的研究开辟了新的道路．