查询词典 circuits

By studying the internal structure and working principle of 555 timer, this paper introduces three typical circuits----Schmitt trigger, Bistable multivibrator and Astable multivibrator----which are composed by 555 timer. Furthermore, it explores the various applications of 555 timer in circuit designing through the expansion of the circuits and eventually same experience and methods offers in circuit designing by using 555 timer.

本文通过研究555定时器的内部结构和工作原理，介绍了其组成的施密特触发器，单稳态触发器和多谐振荡器等三个典型电路，并通过这些电路的扩展，探讨了555定时器在电路设计中的各种应用，由此得出用555定时器设计电路的经验和方法。

In this paper,first,we analyse and design the main circuits of the power supply,and we explain how to use the three-phase spwm wave generator SA4828,and then we also explain the IGBT drive module EXB841,after that,we discuss the IGBT buffer circuit and the protective circuits of the system.finally,we discuss the process of the software design.

在本文中，我们首先对电源主电路进行分析与设计，然后对SA4828三相SPWM波发生器的使用和编程进行了介绍，还对IGBT驱动模块EXB841进行了介绍，另外，我们还讨论了IGBT管的缓冲电路和系统的保护电路，同时分析了系统的软件设计过程。

Meanwhile , based on the AT89C51 microcontroller, the system are made up of the double-Level capacitive sensor , the detection circuit of sensor signals, CPU and display circuits, alarm circuits and system software.

同时该系统以AT89C51单片机为微控制器，由双电容式料位传感器、传感器信号检测电路，CPU及显示电路、报警电路和系统软件等构成。

Meanwhile , based on the AT89C51 microcontroller, the systemare made up of the double-Level capacitive sensor , the detection circuit of sensor signals, CPU and display circuits, alarm circuits and system software.

同时该系统以AT89C51单片机为微控制器，由双电容式料位传感器、传感器信号检测电路，CPU及显示电路、报警电路和系统软件等构成。

Credits earned from successful completion of the courses such as Analogue Electronic Circuits, Digital Electronic Circuits, Signal %26amp; system, High-Frequency Circuit, Digital Signal Processing, Communication Principle, Mono-computers Principle and Application, Theory of Electromagnetic Field, Automatic Control Principle will entitle one the conferral of minor certificate.

五、授予学位：工学学士Ⅴ Degree Conferred： Bachelor of Engineering 六、辅修专业说明Ⅵ Conferral of Minor Certificate：选修并通过本专业如下所有课程：模拟电子线路、数字电子线路、信号与系统、高频电路、数字信号处理、通信原理、单片机原理与应用、电磁场理论、自动控制原理，共30个学分可获得本专业辅修证书。

Termination to avoid reflection is an analogous technology, but it is today an essential technology for high speed digital circuits which should be considered as distributed constant circuits.

终端匹配避免反射是模拟技术，但今天也是高速数字电路的关键技术，高速电路被认为是分布式常数电路。

As the objects on which multi-valued modular algebra operation is imposed usually are multivalued signals, so are the operation results. Application of ternary edge-triggered flip-flops makes us be able omit extracoding circuits in timing circuits.

由'J'多值模代数中的两个基本运算的作用对象和运算结果均为多值信号，所以它的应用避免了以往在采用基｝POOI代数的三值触发器时，由于输入、输出信号不匹配而必须增加附加编码电路的问题。

Power electric circuits, magnetic circuits, lumped parameter electromechanics, elements of linear and rotating electric machinery.

电力电路、磁路、电机机械的混合参数、线性与旋转电机要点。

We present some new topologies of components and devices, embedded passive circuits and interconnections with good EM properties which can meet development of microwave and millimeter wave LTCC technology and domestic state of arts and crafts inland. These algorithms are applied to optimization of LTCC circuits by using relevant production and applicable techniques in SM study, i.e. optimizing and designing various LTCC capacitors and inductances by original space mapping, LTCC transitions by aggressive space mapping and equivalent lumped-element LTCC filters by knowledge-based aggressive space mapping and neural space mapping.

并且针对微波、毫米波LTCC技术发展需要和国内加工水平，探索具有良好电磁特性的新型组件拓扑结构及其内嵌无源电路、互连实现形式，利用在空间映射研究中取得的成果和开发的实用技术，实现LTCC电路的优化，主要是采用初始空间映射方法优化设计了LTCC电容电感、采用主动空间映射方法LTCC过渡、采用基于知识主动空间映射方法与神经网络空间映射方法优化设计了LTCC等效集总元件滤波器等。

The exchange theorem of bases of closed regular fuzzy matroids is obtained with the help of "the exchange theorem of bases" of crisp matroids. Then,the relations between the fuzzy bases and the fuzzy circuits in closed regular fuzzy matroids are studied, and some necessary and sufficient conditions for some fuzzy independent set to be a fuzzy base; some fuzzy circuits from a fuzzy base, and some fuzzy bases from a fuzzy circuit are investigated.

根据传统拟阵的基交换定理，作者给出了闭正规模糊拟阵的基交换定理，得到了一系列结论，并在此基础上进一步研究了闭正规模糊拟阵的模糊基与模糊圈之间的关系，然后给出了闭正规模糊拟阵中某模糊独立集是模糊基、从一个模糊基得到一些模糊圈、以及从一个模糊圈得到一些模糊基的充要条件。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。