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Aimed at the use of underwater active detection system, an analog pretreatment circuit is designed. More than one amplifier and two filters are used to process the signal. The signal can be amplified and self-excitation is avoided. The series of AD867X are used to restrain the circuit noise.

针对水下主动探测系统的应用，设计了一种模拟预处理机，该电路采用分级放大结构，并使用两级滤波器对信号进行滤波处理，在达到对信号放大倍数要求的同时避免了放大器自激，采用噪声性能好的AD867X系列芯片有效抑制了电路噪声对信号的影响。

In this thesis, the self-excited oscillation in HVDC circuit breaker is investigated. And the main problems in the development of HVDC circuit breaker have been summarized.

本文对高压直流断路器的自激振荡问题进行了深入的研究，并分析和介绍了高压直流断路器的发展现状及研制中所面临的主要问题。

Based on method of moment and field-circuit coupling theory, nodal method of analysis in circuit theory is applied to the power parameters calculation of grounding grids. The inner self-resistance and self-inductance of conductors, mutual inductance between conductors, and displacement current of conductors are taken into account.

基于矩量法和场路结合的思想，将电路中的节点电压法用于接地网工频参数计算中，该方法不仅考虑了接地导体的内自阻抗和自感，而且考虑了导体间的互感，导体的位移电流。

Using staircase concatenation method SCM,the optimum coupling conditions were achieved for wedge-shaped fiber wedge angle,cylindrical endface lens curvature radius,semimajor axis of planar lightwave circuit elliptical field,aspect ratio of planar lightwave circuit elliptical field,misalignment tole.

在多量子阱-平面光波光路前置模斑转换器和不加模斑转换器的情况下，用阶梯串联法数值模拟并优化设计了楔形光纤-平面光波光路间最佳耦合参量：楔形光纤楔角45°、端面圆柱透镜曲率半径2。

A sequential circuit controlled the switching of the three timeslots. Technical details, such as, sequential logic design and switching circuit were discussed.

由时序电路控制三个时隙的切换，论述了时序设计和开关选取等技术细节。

The series circuit is a circuit where the current is not divided at any point .

串联电路是在任何点上不再分开的电路。

The fundamental configuration of the main circuit of series power quality compensator is proposed and its design scheme of the main circuit is analyzed based on the development of an experimental prototype.

文中介绍了串联型电能质量补偿器主电路的基本结构，结合实验样机的研制对主电路各部分设计方案进行了分析比较。

This paper has simply introduced the series resonance circuit principle of work and the electric circuit characteristic, and has used simulation teaching software Multisim carries on the analysis it.

本文简要地介绍了串联谐振电路工作原理和电路特点，并使用仿真教学软件Multisim对其进行分析，仿真结果与理论计算结果基本一致，说明了Multisim在电路分析教学中具有非常重要的意义。

And it throught the computers simulation about the series resonance circuit,it summarizes the effects on the circuit of the parameters and the factors.

并利用计算机对谐振回路进行仿真计算，分析出电路中各参数和各种因素对充电回路特性的影响，并对以后高频大功率串联谐振逆变电源的设计有一定的指导意义。

During the testing process, the circuit use the on-off power supply's pull and push structure as prototype, gaining a additional LC in series resonance circuit, which is also a opposite sharp structure. In the same frequency,and in the work state of work voltage, receiving even more high efficiency and output power.

该电路在实验过程中以开关电源推挽式结构为原型，改进得到一个附加了LC串联谐振回路的反激式结构，在同等工作频率、工作电压的状态下，得到了比推挽式结构更高的效率和输出功率。

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。