及电路

It shows out the analysis, debugging of excogitation and the graphics of corresponding objects.

本文着重描述了反馈式力传感器的前向通道设计，主要完成了力发生器及驱动电路、位移检测电路、系统机械结构的设计及制作，并给出了方案的分析和调试及相应的实物图。

This paper describes a design of the frontal channel of pressure sensor based on feedback and mainly accomplishes the design and manufacture of force generator, electric drive, displacement-measure circuit and the system mechanical structure.It shows out the analysis, debugging of excogitation and the graphics of corresponding objects.

本文着重描述了反馈式力传感器的前向通道设计，主要完成了力发生器及驱动电路、位移检测电路、系统机械结构的设计及制作，并给出了方案的分析和调试及相应的实物图。

This paper describes adesign of the frontal channel of pressure sensor based on feedback and mainly ac complishes the design and manufacture of force generator,electric drive,displacement-measure circuit and the system mechanical structure.It shows out the analysis,debugging of excogitation and the graphics of corresponding objects.

本文着意描述了反馈式力传感器的前向通道设计，主要完成了力发生器及驱动电路、位移检测电路、系统机械结构的设计及建造，并给出了方案的分析和调试及相应的实物图。

This text introduce a sort of new pattern soft switch PFC circuit .First, analyze the develop course of the on-off power supply. Second, relate the harm of humorous wave to the commonality electricity net. Third, present the topology and the principium chart of the soft switch PFC and analyze it .At last ,set the parameter and simulates the converter of with matlab simulation. more over ,get the hold of well voltage and current wave , minish the spoilage of the circuit, enhance the efficience of the circuit, meet the demand of the miniaturization and viridity.

本文引入了一种新型的软开关PFC电路，首先分析了开关电源的发展历程，然后讲了谐波给公共电网造成的危害，再给出了这种软开关PFC的电路拓扑及原理图并对其工作原理进行了分析，最后对其参数进行设置在MATLAB软件进行了仿真，并得到了良好的电压电流波形，而且减小了电路的损耗，提高了电路的效率，实现了小型化，绿色化的要求。

Meanwhile, the article discusses the methods of magnetizing and demagnetizing the permanent magnet by the pulse of strong current ,which is produced through the discharging of the capacitance in a second order circuit which is made up of RLC in series.

介绍了永磁起重吸盘的工作原理及相对于传统电磁铁的节能、省材、廉价、安全等特点，讨论了应用电容储能经 RL C串联二阶电路放电产生的强电流脉冲对永磁体进行充、退磁的方法及涡流问题，给出了一种控制电路及实验结

It overcomes low automation and adaptability of other congeneric control systems.Through timer module to set bait supplying time,the function of automatic feeding was realized in a whole day.Through master control CPU circuit and direct current velocity modulation to control the speed of feeding electromotor,the purpose of adjusting feeding distance was realized....

通过定时模块灵活设置供饵时间，实现全天全自动投饵的功能；主控CPU电路及直流调速电路控制投饵电动机的速度，实现了调整投饵距离的目的；霍尔电路与声光报警电路保护投饵电机的安全；使自动投饵控制系统的通用性更强，可以应用到各种水产养殖业的供饵系统中。

High frequency emergency lighting apparatus for telecommunication power system is proposed in this paper. The proposed circuit configuration comprises an electronic ballast, a line voltage detector, and a charger/discharger. To compact the system structure and raise the efficiency, the class E inverter and bi-directional converter are employed, respectively.

本文中主要提出一种应用於电信电源供应系统之高频紧急照明装置，所提之架构包括采用E类换流器为主电路之电子安定器、市电侦测电路及单级双向充放电电路，其主要特徵是电路简单、维修容易且具高效能。

The paper discuss the main circuit and control circuit structure of the active power filter, according to the main circuit divided into two different kinds of structure that are four-phase convertor and three-phase convertor, this paper do deep research on each work theory and control circuit, provide each control method and DC side voltage control method.

论文讨论了在三相四线制系统中有源电力滤波器主电路及控制电路的构成，就主电路分别为四相变流器和三相变流器两种不同结构方式的工作原理和相应的控制电路进行了深入的研究，提出了各自的控制方法以及相应的直流侧电压控制方法。

Also, we select the signal collecting circuit of three output polars, the coupling circuit using capacitance and resistance, the alternating amplify processing circuit, the positive feedback retardation comparsion, the driving circuit of output current and the stabilization voltage supply circuit.

选择了InSb磁阻三端输出型信号采集电路，阻容耦合型交流放大电路，正反馈迟滞型电压比较器和大电流推挽驱动电路及稳压电源电路。

This paper attempts to associate PFC technology with Quasi-Resonant DC/DC Converter and Synchronous Rectifier technology, to work out a novel switching power supply with higher efficiency and low contamination, which both achieved high power factor, improved effecting on electrical network and ensured high efficiency, furthermore, it is easy to be realized and controlled in circuit.

本文首先阐述了开关电源、功率因数校正技术和同步整流技术的发展及现状，对DC/DC变换的拓扑结构进行了选择，确定了带有隔离的准谐振(Quasi-Resonant)反激型电路，可以有效地降低损耗；接着本文对几种常见的PFC拓扑电路进行分析对比，从中选择了BOOST型电路，对工作在临界状况下的电路进行了分析，采用跟随输入电压的升压变换新技术，减小了电感体积，同时降低了开关管的电压应力，既简单又有效地实现了功率因数校正，并发现此技术值得推广；由于反激型变换器的效率一般都较低，所以本文在传统同步整流技术基础上对其加以改进，设计出一种新颖、高效的同步整流方案。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。