查询词典 waveform

The spread paths of common mode and differential mode noises in an SMPS under electrical fast transient/burst are studied and discussed. Hereby for single transient pulse, the vector fitting method is adopted combining rational function approximation according to the tested waveform to construct the a mathematical modeling of frequency, then a pole-residue representation is obtained by partial fraction expansion, and the last step are to draw a state space description and equivalent circuit.

在分析开关电源进行电快速瞬变脉冲群骚扰试验时共模和差模噪声的传播途径的基础上，对于单个脉冲，根据试验数据采用矢量匹配法结合有理函数逼近构造得到频域下的数学模型，通过部分分式展开得到零极点表达式，并最终得到相应的状态空间方程以及等效电路。

This paper introduces the main components of the anticollision facilities of superhighway and their functions, and in the light of the damage extents of the anticollision facilities such as the steel- pipe column, waveform guard plate , clog- proof block, and isolated gate, etc.

介绍了高速公路防撞设施的主要构成及其功用，针对钢管立柱、波形护栏板、防阻块、隔离栅防撞设施被毁坏的程度，提出了相应的维修方法。

PVI automatically and continuously calculatesthe respiratory variations in the plethysmography waveform amplitude.

PVI 自动连续地计算出在脉搏氧饱和度仪的描记图中的波形振幅中的呼吸变异。

The simulation and part of experiment results show that this kind of optical current sensor has a good response waveform and amplitude, frequency characteristics in proper parameters.

仿真和部分实验结果表明此种光学电流传感器在合适参数下具有较好的响应波形以及幅值、频率特性。

Objective To evaluate the relationship between a proximal artery stenosis and downstream Doppler waveform in dogs.

目的 探讨动脉狭窄性病变远端的超声血流动力学变化与狭窄程度的关系。

Based on Lissajou figures, using radius vector deviation to express figure form deviation, the relation between radius vector deviation and signal waveform parameters is analyzed.

以Lissajou图形计算法为基础，用向径偏差来表征图形形状偏差，分析了向径偏差与信号波形参数之间的关系，设计了编码器动态细分误差快速评价系统。

The system can get the signal waveform parameters from the harmonic components of radius vector deviation, plot a curve of interpolation error by delivering magnified moiré fringe photoelectric signal to computer with digital acquisition board.

该系统可以利用数据采集卡，将放大后的莫尔条纹光电信号送入计算机，由向径偏差的谐波成分得到信号波形参数，绘出细分误差曲线。

The main causes of the vibration in pipeline system are in two respects : The first is the vibrant force of the medium acted on pipeline system,i.e.exciting signal,such as the vibrant force caused by the gas flow at the compressor ′ s inlet and outlet and at the ramified and nodel points as well as the action of pig passing through pipeline bridge,etc.;The second is the response to the exciting signal,which is relating to the characteristics of the pipeline system,i.e.the rigidity,support,quality and equipments of the system besides the waveform of the exciting signal.

管道系统振动的原因主要有两方面，一是介质对管道系统产生的振动力，即激发信号，如气流在压缩机进、出口，分支节点部位产生的振动力，清管器通过管桥时对它的作用等；另一方面是对激发信号的响应，其响应除了和激发信号的波形有关外，还和管道系统本身的特征，即系统的刚度及支撑，质量及其配置等情况有关。

A lot of experiments prove that it has relatively high data sampling speed and waveform resolution rata, it provides a new method for the study of the are voltage sudden-changing process.

试验证明该系统具有较高的数据采集速度和波形分辨率，它为电弧电压突变运动过程的深入研究提供了新的分析方法和手段。

Often divided into two types:(1) sine wave oscillator, according to the network oscillation frequency of the different loop selected further divided into RC sinusoidal oscillator, LC sinusoidal oscillators, quartz crystal oscillators, voltage-controlled oscillator, voltage-controlled crystal oscillator and other forms;(2) non-sinusoidal oscillation device, also known as relaxation oscillator, is the use of capacitor charging and discharging and active device (transistor, FET, single-junction transistor, etc.) to generate the pulse-off square wave, rectangular wave, triangle wave, sawtooth wave, or these basic waveforms synthetic waveform and its frequency by the LC time constant charge and discharge circuits to decide.

常分两大类型：（1）正弦波振荡器，根据振荡环路中选频网络的不同，又分为RC正弦波振荡器、LC正弦波振荡器、石英晶体振荡器、压控振荡器、压控石英晶体振荡器等多种形式；（2）非正弦波振荡器，又称张弛振荡器，是利用电容充放电及有源器件（晶体管、场效应管、单结晶体管等）的通断来产生脉冲方波、矩形波、三角波、锯齿波或这些基本波形的合成波形，其工作频率由LC充放电电路的时间常数来决定。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。