电子设备的电磁兼容结构设计

对于六面体框架结构的电子设备,如果其电磁兼容性要求较高,电磁兼容结构设计至关重要.     

电子战半实物仿真系统

介绍了Windows NT RTX及广播内存网在实时性方面的特点及其软硬件组成,对电子战系统的半实物仿真进行了详细综述,阐明了电子战半实物仿真系统的系统构成,并对系统的各组成部分进行了讨论。     

军用电子元器件的选择和使用

随着武器装备的不断发展, 电子元器件, 尤其是微电子器件在海军装备上的应用越来越广泛, 电子元器件的选择和使用就日益显得重要。本文结合军用电子产品元器件选择和使用的实际情况, 着重就元器件选择和使用过程中的采购、筛选、破坏性物理分析以及失效分析进行了探讨, 给出了元器件的选择和使用准则以及全过程流程图。     

A Review of Toxicity Mechanism Studies of Electronic Cigarettes on Respiratory System

Electronic cigarettes (e-cigarettes) have attracted much attention as a new substitute for conventional cigarettes. E-cigarettes are first exposed to the respiratory system after inhalation, and studies on the toxicity mechanisms of e-cigarettes have been reported. Current research shows that e-cigarette exposure may have potentially harmful effects on cells, animals, and humans, while the safety evaluation of the long-term effects of e-cigarette use is still unknown. Similar but not identical to conventional cigarettes, the toxicity mechanisms of e-cigarettes are mainly manifested in oxidative stress, inflammatory responses, and DNA damage. This review will summarize the toxicity mechanisms and signal pathways of conventional cigarettes and e-cigarettes concerning the respiratory system, which could give researchers a better understanding and direction on the effects of e-cigarettes on our health.     

EDA技术在电子技术基础实验教学中的应用

介绍了PSPICE软件的特点 ,通过实例说明将其引入模拟电子技术基础实验教学对提高教学质量的作用 ,同时也分析了PSPICE软件应用于实验教学的局限性 ,指出在实验教学中 ,仿真实验一定要与实际操作实验相结合 ,做到“软硬兼施” ,才能真正达到理论与实践相结合的实验目的。     

HID灯及其电子镇流器

该文介绍了高强度气体放电(HID)灯的各项性能指标与应用领域,并重点对其配套用电子镇流器的结构、原理,以及对比磁回路式镇流器所具备的特点予以阐述。     

单相电子式电能表特点及选型时应注意的问题

结合单相电子式电能表在石家庄电业局的使用情况,介绍了单相电子式电能表的特点、适用范围和选型时应注意的一些问题。     

金属卤化物灯电子镇流器研究

:本文提出了一种在高频下工作的金属卤化物灯电子镇流器,分析了其电路组成及工作原理,由于高频开关管实现了零电压通断,提高了工作效率;利用纹波电压作为调制信号对灯电流进行频率和幅值调制,避免了声共振的发生;采用扫频谐振方式产生高压触发脉冲,触发可靠;与传统低频方波工作方式相比,结构简单、所用器件少、效率高、可靠性高.实验结果验证了该方案是可行的.     

LSF-Z型密闭式纯水冷却系统的研制与应用

LSF-Z型密闭式纯水冷却系统主要由电气控制回路、主循环冷却水回路和副循环去离子回路构成。分析了其工作原理及水风换热器、主循环水泵和主过滤器等主要零部件的功能,介绍了该系统出厂前的试验项目及试验内容。通过实际工程应用表明,该系统能够满足高压大功率电力电子装置的冷却要求,保证了电力系统安全稳定地运行。     

Speed control of general‐purpose engine with electronic governor

This paper presents a general‐purpose engine speed control system with an electronic governor in order to improve the current system with a mechanical governor, which shows unstable characteristics as a result of a change in mechanical friction or the A/F ratio (air–fuel ratio). The control system above has the problems that the feedback signal is only the crank angle because of cost, and the controlled object is a general‐purpose engine, which is strongly nonlinear. In order to overcome these problems, a system model is presented for dynamic estimation of the amount of air flow, and a robust controller is designed. In concrete terms, the proposed system includes a robust sliding‐mode controller using the feedback signal of only the crank angle, with a genetic algorithm applied to the controller design. Simulations and experiments performed using Matlab/Simulink show the effectiveness of our proposal. © 2012 Wiley Periodicals, Inc. Electr Eng Jpn, 179(2): 64–71, 2012; Published online in Wiley Online Library ( wileyonlinelibrary.com ). DOI 10.1002/eej.21130