开关

With low pass switched capacitor filter as an example, this paper introduced the operating principle and characteristics of switched capacitor filter and made detailed analysis and an approach to its use.

以低通开关电容滤波器为例介绍了开关电容滤波器的工作原理及特点，并对其设计方法进行了详细分析和探讨。

However, values estimated by SMO does have chattering problem because of the discontinuity and finite switching frequency of the real system.

但实际系统的不连续性和有限的滑模开关频率以及滑模开关增益选取不当使得滑模变结构观测器所估计量存在抖振问题。

Owing to its small volume, light weight, high efficiency, succinct circuitry, high reliability and great capability of self-equalizing output loads in different circuitries, the Fly-back Converter becomes the optimally topological form of designing auxiliary power supply of high frequency switching power and driving power supply of power switching.

由于反激式变换器不但具有体积小、重量轻、效率高、线路简洁、可靠性高等优点，而且还具有较强的自动均衡各路输出负载的能力，目前反激式变换器的电路拓扑形式已成为人们设计高频开关电源的辅助电源以及设计各种功率开关驱动电源的首选。

The difference between a hard switching and quasi resonant flyback converter is the turn on time point of the primary

硬开关和准谐振反激变换器之间的差异在于一次侧开关的开启时间点。

The compressor will run until the cold control is turned off or the freezer compartment reaches the set temperature. The refrigerator temperature is controlled by the freezer control setting.

在制冷开关自动关掉或冷冻柜到达设定温度之前，压缩机都是运行的，冷藏柜的温度是由冷冻开关来控制的。

The company produces goldcup, gold dragon, futian, wanfeng, changan, sitaier etc. type of various cars to use. Temperature controller, enlarger, manipulate, adjust the flat-outresistor, A/C switch, wind velocity switch, electricity the control the box etc. product 100 variety.

公司生产金杯、金龙、福田、万丰、长安、斯太尔等多种车型的汽车空调用温控器、放大器、操纵器、调速电阻器、A/C开关、风速开关、等产品100多种。

According to the characters of the equipment switch, brings forward a new detection method of grayness mutation line; according to the characters of the broken switch, brings forward a new detection method of the outline slope.

研究并分析了几种常用的图像识别方法，针对设备开关的识别，提出了灰度突变线检测法；针对断电器开关的特点，提出了边缘斜率检测法。

In order to optimize performances of shunt active power filter of harmonic compensation, attenuation ratio for switching ripple, stability and power losses, an improved LCL filter topology was presented based on the analysis of the frequency characteristics of the LCL filter, in which a switching-ripple shunt branch and a series-inductor were adopted to the damping resistor to reduce the power losses dramatically.

为了使并联有源滤波器谐波电流补偿性能、开关纹波衰减率、系统稳定性和功率损耗等方面性能得到系统的折中和优化，提出了一种改进型LCL滤波器拓扑，该结构充分利用了LCL滤波器的频率特性，在阻尼电阻两端引入开关纹波谐振分流支路，同时在阻尼电阻上串联一小电感，有效的减少了阻尼电阻的损耗而不改变系统的静态和动态性能。

This device, which is composed of oscillator, switching capacitor, second-order tracking system, digital switching system, power-amplifier circuit and Helmholtz coils , can produce rotating magnetic field whose frequency and strength can be adjusted continuously.

该装置由振荡器、开关电容、二阶跟踪系统、数字开关系统、功放电路及亥姆霍兹线圈组等部分组成，可以产生频率、强度连续可调的旋转磁场。

Then the breakdown mechanism was introduced to explain the results.It is found that the optimum polarity combination is heteropolarity and the best scope of the ratio between trigger voltage and self-breakdown voltage is 30%~50%.

实验结果表明：新型触发管开关获得最佳触发特性所需的极性组合应为异极性组合，触发电压幅值范围为自击穿电压的30%~50%，为兼顾触发电流和保护触发器，触发电阻值应为50~100 Ω，验证了触发管开关击穿机制的已有认识。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。