开关

SB2015-3 Precision Decade DC Resistance Box adopts high voltage glass glaze resistors and special high voltage seal switch.Its electric performance is very stable and insulation intension is very high.The resistance value can be adjusted under the condition of ceaselessly opening voltage(Note:The using switch should not be at the point of 0.)It is easy to operate and suitable to be used to calibrate insulation resistance meter,and suitable to be used as high resistance standard.

SB2015-3型精密十进位直流电阻箱采用高压玻璃釉电阻器及独特的高压密封开关，电性能稳定可靠、绝缘强度高、可在不断开测试电压的条件下调节电阻值（正在使用的那只开关不处在&0&位置时）、操作方便，适用于检定/校准绝缘电阻表，也可作为高阻标准。

In this paper,the basic control requirements of Switched Reluctance Starter/Generator applies to Hybrid Electric Vehicle Integrated Starter Generator system to realize starting and generating are discussed.

本文将开关磁阻电机起动、助力、发电一体化应用于混合动力汽车ISG系统中，实现混合动力汽车ISG系统的起动、助力、发电等基本功能，同时设计了系统的整体控制策略，构造了基于TMS320F240和EPM7128S为核心的DSP+CPLD型数字控制器，完成了六相12/10结构开关磁阻起动/发电机样机的起动和发电实验，给出了实验波形和分析结论，表明了本方案控制器和控制策略的可行性和有效性。

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。

Switching arc can be thought as a column because of its self-magnetic field pinch effect. Arc column is deformed by magnetic force that produced by circuit current flow. If the arc image was acquired from a orthongonal direction to arc column deformation force.

在分析低压电器开关电弧的低温等离子体特性、弧柱磁压缩效应的基础上，提出了基于电弧图象采集和非均匀有理B样条曲面拟合相结合的开关电弧可视化仿真模型。

The reduction in switchable polarization of ferroelectric thin film is a major problem in ferroelectric mem...

铁电薄膜开关过程中可反转的极化随开关次数而降低，即铁电极化疲劳，这是铁电存储器应用中遇到的一个大问题。

By means of switching the press button, the switch is switchable between an on state and an off state.

通过按按钮开关，开关状态之间切换和关闭状态。

The reduction in switchable polarization of ferroelectric thin film is a major problem in ferroelectric memories.

铁电薄膜开关过程中可反转的极化随开关次数而降低，即铁电极化疲劳，这是铁电存储器应用中遇到的一个大问题。

According to different states of switch, relevant equivalent circuit models are investigated to optimize switch performance.

根据开关的拓扑结构，提出相应的等效电路，并据此实现开关射频性能的优化设计。

Several new topologies are presented in this paper.

本文在对现有软开关电路的分析和实验的基础上，提出了多种软开关电路。

Using the front panel to fire any pad which has a red drag race switch turned on will simultaneously fire all others which have their red switch turned on.

使用前面板的消防任何垫，其中有一个红色拖曳种族开关开启时，将同时消防所有其他有他们的红色开关打开。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷