基于模糊控制的微型燃机燃料压力控制

针对微型燃气轮机在控制时由于压力不恒定而导致的运行效率低的问题,将模糊PID控制思想运用到控制系统。在传统的PID控制下加入模糊控制,使其PID参数具有在线自整定功能。仿真结果表明,该方法能够很好地提高压力控制效果。     

公共场所监测仪器直读数据与国家标准单位转换器应用软件的设计与实现

本软件可为我单位公共场所管理人员提供监测现场的仪器直读数据与国家标准单位之间的转换功能。该系统已在实际工作中投入运行,使我们的业务工作变得简便快捷、准确规范,极大地提高了工作效率,具有一定的社会效益。     

新型农药嘧肽霉素防治番茄病毒病药效

室内和田间一系列试验表明，嘧肽霉素对番茄等蔬菜、瓜类的病毒病具有良好的防治效果，最高防效达82．2％，并使作物相应增产。该药剂对病毒病还具有治疗作用，并兼有调节和改善作物其它性状的作用。嘧肽霉素因其高效、低毒、无残留而最适合于蔬菜、瓜类等作物病毒病的防治。     

基于面向对象技术的图书馆管理系统研究

基于面向对象技术在软件开发中得到了广泛的应用。图书馆管理系统需求的复杂性要求其采用面向对象方法进行系统分析和设计．基于此，本文对基于面向对象技术的网络化图书馆管理系统进行了研究；首先介绍了Browser／Server系统结构和面向对象的系统分析技术，结合图书馆的实际要求，对图书馆管理系统进行了需求分析、功能模块划分、数据库模式分析，然后对图书馆管理的相关内容进行了分析，最后研究了图书馆管理系统的框架结构以及主要模块．     

电力线载波通信技术在楼宇智能监控中的应用

介绍了一种基于电力线载波的楼宇智能控制系统的实现方法。其以LM567为核心，通过调制发送和解调接收，在电力线上实现了语音信号和控制信号的复用传输。     

Preparation of BaTiO3-Based Nonreducible X7R Dielectric Materials Via Nanometer Powders Doping

Nonreducible X7R dielectric materials, which can be cofired with Ni electrode, were obtained by doping nanometer additives to BaTiO₃ powders synthesized by employing a sol-gel method. The crystallization process, structure and constituent of nanometer additives, as well as morphologies were studied via differential thermal and thermogravimetric analyses (DTA/TG), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The effects of the calcining temperature of dopants on the dielectric properties were also discussed. The experiment results proved that higher-performance X7R dielectric materials could be obtained via nanometer doping compared with conventional doping. At room temperature, dielectric constant is more than 3000; dielectric loss lower than 1.0% and insulation resistance more than 10¹¹Ω ⋅cm.     

Abnormal growth of austenite grain of low-carbon steel

Niobium is an important alloying element for the steel. To know further the effect of Nb in the steel, the contrast experiments on the austenite grain growth of the 0.015%Nb and free Nb steels were carried out using Gleeble 1500 thermomechanical simulator. The experimental results indicate that the austenite grain of 0.015%Nb steel is finer than that of Nb free steel at 1150–1230 °C. And when the heating temperature arrives the critical temperature 1240 °C, the austenite grain of Nb steel suddenly grows up, while the austenite grain of Nb free steel changes little. Finally, the austenite grain of Nb steel is obviously coarser than that of Nb free steel. By transmission electron microscopy (TEM) using a carbon extraction replica technique, the precipitates of Nb(C,N) were not observed in the 0.015%Nb steel. It is concluded that the grain-boundary internal adsorption of Nb atoms leads to the result.     

New Application of Stainless Steel

Several rigid substrates such as stainless steel, titanium alloy, aluminum alloy, nickel foil, silicon, and sodium lime glass have been employed for manufacturing high quality TiO2 films by metal organic chemical vapor deposition （MOCVD）. The as-deposited TiO2 films have been characterized with SEM/EDX and XRD. The photocatalytic properties were investigated by decomposition of aqueous orange Ⅱ. UV VIS photospectrometer was employed to check the absorption characteristics and photocatalytic degradation activity. The results show that films synthesized on metal substrates display higher photoactivities than that on absolute substrates such as silicon and glass. It is found that solar light is an alternative to UV-light used for illumination during photodegradation of orange Ⅱ. TiO2 film on stainless steel substrate was regarded as the best one for photocatalysis.     

如何理解微机变压器差动保护中的相角归算

对微机变压器差动保护的原理，阐述个人的理解、观点，并就微机差动保护在试验中应注意的问题提出了一些个人的见解。     

CeO2和La2O3对高炉喷吹煤粉燃烧过程的影响

在模拟高炉喷吹的条件下,对添加CeO2 和La2O3的混合煤粉进行了燃烧试验,考察了稀土氧化物对高炉喷吹煤粉燃烧过程的影响,并探讨了其助燃作用机理.