查询词典 waveform

Prove the feasibility and practicability of the waveform generator base on PCI form in theoretics and practice.

从理论和实践上证明了基于PCI总线的波形发生器的可行性和实用性。

The three valued logic modulation technique is usually used in the conventional current source PWM rectifier, and the SPWM control waveform can be obtained by the interphase decoupling.

传统的电流型PWM整流器一般采用三值逻辑SPWM调制技术，通过相间解耦预处理的方法获得实际PWM控制波形，过程复杂且直流电流利用率较低。

The transition time given in this data sheet represents the rise and fall times of the output waveform.

Ex 3 在这个数据单中给出的转换时间表示了输出波形的上升和下降时间。

And this causes a frequency change Δf. The resonant point tracing algorithm describes how to detect Δf. So it can introduce a feedback frequencydifference -Δf through a closed loop to realize the resonant state o In the digitaldetection scenario, using staircase wave to replace saw tooth wave, it can overcome a lot of shortcomings in the analog system. The character of the staircase wave affects the detection precision directly. This thesis analyzes a high precision scenario producing a staircase waveform in detail. It can reduce the number of the bits in D/A converter greatly. This thesis proposes another method to improve the detection precision in case that the A/D converter has comparatively little number of bits, while this method will not increase the cost of the system greatly.

在谐振式光纤陀螺中，环形谐振腔的旋转使得谐振腔的谐振频率发生了变化，从而产生了一个与旋转速度成正比的频率变化值△f，谐振点跟踪算法描述了如何检测出△f，从而可以通过闭环在系统中引入反馈频差-△f，实现光路的谐振状态；在数字闭环检测方案中，用阶梯波作为反馈信号来代替锯齿波，可以克服原来模拟系统中锯齿波的很多缺点，阶梯波的性能直接影响着系统的测量精度，本论文详细分析了一种高精度阶梯波生成方案，使得所需D／A的位数大大降低；本文还分析了A／D转换器对系统测量精度的影响，提出了一种A／D转换器位数较少的情况下提高系统测量精度的措施，同时又不会增加太多的系统成本。

It is applicable to the BLDCM with trapezoidal back EMF waveform.

论述了一种用三次谐波检测转子位置的新方法。

Objective To investigate the characteristics of brain stem trigeminal evoked potentials waveform.

目的 研究脑干三叉神经诱发电位的波形特征。

To evaluate the severity of damage and identify the damaged winding s, this paper presents a method that uses the comprehensive information, including the value and waveform of the fault current, insulation resistance, oil-dissolved gas analysis, winding resistance, turns ratio, deformation detection, and it is of significance to the fault elimination.

介绍了综合利用短路电流值和波形、绝缘电阻、色谱、直流电阻、变压比、绕组变形等资料和手段判断大型变压器低压侧出口短路事故的严重程度、被损坏绕组的相别，为故障的处理提供参考。

Communication System Simulation : Unipolar zero waveform and power spectrum, duty cycle of 50%.

通信系统仿真：单极性归零波形及其功率谱，占空比为50％。

00 Known moving average digital filter unit for pulse response h = [k = 0,1,2 1,1,1] Calculation y = x * h , the same is likely to draw a map before 50 y s and x waveform sequence comparison y s and .

已知3点滑动平均数字滤波器的单位脉冲响应为h=[1，1，1 k=0，1，2]，计算y=x*h，在同一张图上绘出前50点y，s和x的波形，比较序列y和

In this paper, the theory and method of crust and upper mantle study with surface waveform inversio...

本文对中国及邻区地壳上地幔三维S波速度结构面波波形反演的理论与方法进行了系统的研究。

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。