查询词典 frequency analysis

Analysis of frequency characteristics in classical control theories serves as a bridge connecting time domain method and frequency domain method, and solves problems beyond Routh Criterion.

在经典控制理论中，频率特性分析是联系时域法和频域法的桥梁，而且它还可以解决Routh判据无法解决的一些问题。

The measurement of seismometer transfer function is implemented mainly in the low-frequency part, and transfer function in the high-frequency part is obtained with analysis and calculation.

本文对宽频带地震计的频率特性测试是在地震计的低频段进行，对于地震计高频段的频率特性采用理论分析计算获得。

As a new signal processing method, Wavelet analysis decomposed different kinds of frequency element to non-overlapped frequency bands and this method put forwards an effective way to signal filter, signal-noise separating and character picking-up, especially it has well de-noising capability.

小波分析作为一种全新的信号处理方法，它将信号中各种不同的频率成分分解到互不重叠的频带上，为信号滤波、信噪分离和特征提取提供了有效途径，特别在信号去噪方面显示出独特的优势。

By the research of the RLC series circuit, RLC Parallel circuit, and the starat of Fourier Series, get the further understanding and grasp the characteristics of the resonant of RLC circuit. Even more, on the basis of the RLC series resonance, the other circuit structures selected frequency wave frequency analysis of the election.

本实验通过对RLC串联电路、并联电路及方波的傅立叶级数展开的实验现象的测量及研究，进一步了解和掌握RLC谐振电路的特点，并在RLC串联谐振的基础上，搭建选频电路对方波进行选频分析。

Based on the theory of finite element method and modal analysis, the model of a piano soundboard is established in the ANSYS, then the models' natural frequency, mode shape are calculated. What is more, the influence of tree species on the piano soundboard's fundamental frequency is discussed.

基于有限元法和模态分析的基本理论，利用有限元分析软件ANSYS建立了钢琴音板的有限元模型，然后对钢琴音板进行模态分析，得到了它们的固有频率、模态振型等参数，分析了树种对于钢琴音板基频的影响。

The frequency spectrum of noise is very wide, and will superpose with useful signal that has the notable influence to digital measurement and frequency spectrum analysis. Base on it, the method of solving zero floating problem of Waveform digital reconstruction process is proposed.

噪声的频谱噪声频谱很宽，将与有用信号的频谱重叠，对数字测量、信号处理和谱分析有显著的影响，并提出了解决波形数字重构中数字示波器零漂影响的方法。

3I described two sub-band division method in the frequency domain, and brought forward idea that the energy unitary, and the use one of them to decompose and calculate the entire frequency band. After analysis the results, I could achieve to the band of each prompting and respond, and we used this section energy to determine whether or not unconventionality about the size of valve clearance.

3在频域中描述了子带的两种划分方法，提出了对能量进行归一化的基本思想，并用其中的一种划分方法对整个频带进行了分解计算，经过对计算结果的分析，得到了各个激励响应集中的频带范围，并由此段能量的大小来判断气门间隙有无异常。

This thesis makes the analysis of the methods of frequency measurement,which is the main function of the universal counter,and decides to use the gate modification method to measure frequency.

本文对计数器的主要功能之一，频率测量方法进行了分析，提出采用闸门时间修正法进行测频，降低了量化误差的影响。

On this basis,a set of dynamic signal analysis system is designed by using high cost-effective digital signal processor TMS320F2812DSP.The system can acquisite dynamic signal and process data in the frequency domain,then directly display the value of the signal component of frequency and power,distortion on the LCD.

利用TI公司高性价比的数字信号处理TMS320F2812设计了一种便携式态信号分析仪，该系统信号分析仪可采集动态信号，并处理数据的频域，可直接在LCD上显示信号各分量频率值、功率值、失真度等。

Due to existing signal processing technology's shortage such aslow measurement, narrow measurement range precision and other poor performance, we introduced a high-precise signal processing technology:firstly,to get power spectrum with Hanning windowed Welch modified periodogram, search its peak value frequency;secondly, to apply zooming analysis via Goertzel algorithm;at last,to get a highly precise doppler frequency with energy centrobaric rectifying algorithm.

针对存在的缺点，本文提出了一种应用于激光多普勒测速的高精度信号处理技术，即首先利用加Hanning窗的Welch修正周期图算法得到信号功率谱，搜索其谱峰值频率，接着利用Goertzel频谱细化算法对搜索的谱峰进行细化分析，再引入能量重心频谱校正算法对细化后的谱峰进行校正分析，从而将离散频谱分析算法、频谱细化算法和频谱校正算法三者有机结合起来，充分发挥各自的优点：通过加Hanning窗的Welch修正周期图算法快速得到功率谱及峰值频率，通过Goertzel算法获得分析频带的高分辨率频谱，然后通过能量重心校正算法对细化后的频谱进行高精度校正，这样不仅保证了算法的高效性，而且大大提高了分析的精度。

He got into race cars, while my father liked go-karts more, so I didn't really pay attention to what Diego was doing, as I was just racing karts.

叔叔开的是跑车，而我父亲更喜欢越野卡丁车，所以我并不太关注Diego在做什么，我仅仅在跑我的卡丁车而已。

She is at present gone to look for the best nectar and ambrosia to regale me this evening.

她今晚为款待我，现在又去准备美酒佳肴去了。