频谱分析

对罗兰-C脉冲信号的A/D转换及信号的频谱分析进行了研究；

Secondly , the A / D conversion and the FFT of the Loran-C impulse signal areresearched .

Air（初三适用）空压机齿轮变速箱噪声的倒频谱分析法

The inverted frequency spectrum analysis method of air press gear shifting box

心脏分流疾病的超声脉冲Doppler实时频谱分析

Ultrasonic pulsed Doppler real time spectral analysis in the cardiac shunt diseases

心电R－R间期频谱分析对Ⅱ型糖尿病病人心脏植物神经功能的研究

Spectral analysis of R-R interval in the assessment of cardiovascular autonomic nerve dysfunction in NIDDM patients

基于Python语言的音频捕获及频谱分析程序设计

Method of Audio Capture and Design of Spectrum Analysis Software Based on Python

兔心电QRS波的三维频谱分析

Three dimensional spectrum analysis of electrocardiographic QRS complexes for rabbits

直接数字chirp合成及频谱分析

Direct Digital Chirp Synthesis and Spectrum Analysis

采用频谱分析将储层参数（孔隙度、渗透率、含油饱和度等）进行分析，计算出β和分形特征指数H进行分形模型的识别。

β and fractal nature index H can be figured out according to spectrum analysis of reservoir parameters ( porosity , permeability , oil saturation , etc. )

利用FFT频谱分析方法对一矿井通风机的轴不对中及其由此引起的不平衡故障进行了精密诊断。

With this method , the shaft-misalignment and hence the imbalance faults of a mine ventilator are diagnosed minutely .

大陵五型食双星CIAur的测光解和它的光变频谱分析

Photometric solutions and analysis for an ALGOL type binary CI AUR

快速傅立叶变换（FFT）算法的出现为频谱分析的数字化处理提供了理论基础。

The development of Fast Fourier Transformation ( FFT ) algorithm made it possible in digital processing of Spectrum analysis .

并且这种分析方法为不同调制方式下的输出PWM波形的频谱分析提供了一种启发性的思路。

Further more , analytical solution educes an illuminative clue for spectral analysis on complicated output PWM waveforms based on different modulation strategies .

HDTV亮度信号二维频谱分析

Two dimensional analysis of HDTV luminance signals

详细介绍了FFT频谱分析方法以及风机的几种典型故障的振动特性。

The method of FFT frequency spectrum analysis and vibrant characters of several typical faults of ventilator are introduced in detail .

该开发系统资源丰富，除可以做频谱分析外，还可以进行DSP其它方面的开发工作，为进一步在DSP方面的开发工作奠定了基础。

The development system can be used in other DSP development work beside spectrum analyses with its rich resource , so we lay a foundation of farther development .

XLPE电缆局放脉冲频谱分析及传感器选频

Spectrum Analysis of the Partial Discharge Pulses in XLPE Cable and Frequency Band Selection of Sensors

基于结构实验模态分析及频谱分析技术，针对国产MG牌吉它进行了结构固有振动特性、弹奏声频谱特性的研究。

Based on the experimental modal analysis ( EMA ) and spectrum analysis , the dynamic characteristics and sound spectrums of the MG guitar , made in China , are studied .

这种方案采用双谐振窄带数字滤波器并结合Chirpz-变换算法来实现窄带频谱分析。

This method is to use a bi-resonant narrow bandpass digital filter with chirp Z-transform to realize the narrow band spectral analysis .

利用FFT频谱分析小波包分解的低频段，用来诊断转轴的各类故障.阐述了缺陷的种类、可能造成的后果与影响；

This makes it possible to diagnose the different faults of machines . Then the possible consequences and affects due to the software faults are stated .

正交DRFM的系统仿真及其信号频谱分析

Simulation and Analysis of Spectrum of I-Q DRFM

但是频谱分析方法是稳态方法，即使采用Gabor变换，也因时频窗口形状不变而分辨率较低。

As a stationary method , it has low resolution due to its invariable time_frequency window , even if the Gabor transform is adopted .

识别出分形模型后，应用R/S分析、方差分析和频谱分析求取3个H值，取其平均值以提高准确度。

After identifying fractal pattern , three H values can be acquired through R / S analysis , variance analysis and spectrum analysis , thereby , average value of which can be used to improve calculation precision .

基于小波包频带分解技术提出了信号浮动阈值滤波算法，指出该方法相对于Fourier频谱分析技术，对非平稳信号消噪具有更好的效果。

The floating threshold filter technique based on the frequency band decomposition of the wavelet packet transformation , which is superior to the Fourier spectrum analyze method for non-stationary signal denoising , is presented .

介绍了改进的BP学习方法，仿真测试结果证明，用频谱分析与神经网络相结合的方法进行电子封装机械的工况识别具有简单、有效等优点。

Also introduces the neural network of improved BP learning algorithm . The results of simulation and testing indicate that identifying the working condition of the electronic packaging machine by applying the above method is more efficient .

实验结果表明，此种频率细化方法特别适用于不能同时处理N点、而又要求N点FFT频率分辨力的频谱分析场合。

The experimental results show that this technique of minute analysis in the frequency domain is particularly suitable for the analyzer which cannot handle N points simultaneously but calls for the frequency resolution ' of N points FFT .

其次，针对地震波是一种随机波形，通过快速傅立叶（FFT）算法变换进行频谱分析，将地震波分解为许多不同频率的谐波；

Secondly , the random earthquake waves are decomposed into the superposition of simple harmonic waves with different frequencies by using the spectral analysis of Fast Fourier Transform ( FFT ) algorithm .

并对采用SVPWM调制技术得到的实验波形进行了频谱分析，给出了载波比因素等对谐波的影响。

The spectral analysis is given to experimental waveform get by SVPWM modulation technology . The effect which carrier ratio and other factors take to harmonic is introduced .

阐述了一种新的时频分析方法&基于Hilbert-Huang变换的Hilbert时频谱分析，并将其应用到纱线信号分析中。

This article expounds a novel time-frequency analysis method , i. e. , the Hilbert time-frequency analysis based on Hilbert-Huang transform , and its application to yarn signals .

散点图（lorenzplot，LP）用于心律异常分析是心电检测领域中的新概念，较之频谱分析具有更为详尽的解析能力。

Lorenz Plot ( LP ) is a new conception in the analysis of Heart Rate Variability , which has more elaborate analytic ability than the spectrum analysis of electrocardiogram .

嵌入式平台遵循Modbus／TCP协议通过以太网从单片机接收采集到的数据，并对这些数据进行512点的FFT处理及频谱分析。

The embedded platform received the data from singlechip by Ethernet communication which conformed to the Modbus / TCP protocol , these data was processed by FFT-change of 512 point for frequency analysis .