在信号的几何域特征提取方面，给出了利用分形方法分析超声多普勒血流信号的例子。
The fractal method used for Doppler blood flow signals analysis is an example in geometry domain.
提出一种基于全局优化的动态规划算法以进行超声多普勒血流信号最大频率曲线的提取。
A dynamic programming algorithm based on the global optimization is presented to extract the maximum frequency waveform of the Doppler ultrasound blood flow signal.
超声多普勒血流信号声谱图包络是声谱参数提取的基础，能为临床心血管疾病的诊断提供重要信息。
The spectrogram envelop of Doppler ultrasound blood flow signals from which spectrogram parameters can be estimated is important to clinical diagnosis of cardiovascular diseases.
文章主要研究从超声多普勒血流信号的最大频率曲线中提取特征值，并用于临床血管疾病诊断的方法。
In this paper, a novel method was studied to diagnose the vessel disease using the feature of the maximum frequency waveform from the blood flow ultrasound Doppler signals.
根据超声多普勒血流信号和血管壁搏动信号的统计特性，提出了一种基于主元分析的非线性滤波方法。
A nonlinear filtering method based on principle component analysis (PCA) was proposed according to the statistical characteristics of the Doppler ultrasound blood flow signal and wall thump signal.
本文介绍一种实现傅立叶快速变换的8031单片系统，并给出该系统实时显示和分析超声多普勒血流信号声谱的一些结果。
Fudan University In this paper a 8031 single-chip system for FFT is described. Some results of real-time display and analysis of ultrasound Doppler flow sonography using this system are also given.
超声血流仪实现其测量血流速度的关键是多普勒频移信号的提取，多普勒频移信号是血流速度的真实反映。
As Doppler shift signal can significantly reflect the speed of flow, the abstracting of Doppler shift signal is the key of blood flow speed testing in a ultrasonic blood flow detector.
研制以超声波为载体的电路系统，探测眼部血流多普勒信号，并进行频谱分析。
A set of circuits for detecting ophthalmic blood flow Doppler signals was developed and spectral analysis was realized as well.
多普勒超声血流信号是一个非平稳的高斯随机过程，其时频分布与血流的速度及其变化有密切的关系。
The Doppler blood flow signal is inherently a nonstationary Gaussian random process whose time-frequency representation associates with the time-varying velocity of blood flow and its variations.
目的研究在彩色多普勒超声造影中肝实质性占位血流信号的改变。
Objective To evaluate the hemodynamic changes of the vascularity in hepatic focal lesions by color Doppler flow imaging techniques after intravenous injection of Levovist.
因此精确分离超声多普勒血流与管壁信号具有相当重要的临床意义。
So it is of great significance to precisely extract the intact blood flow components from the mixed signal.
方法对2732例疑诊为椎动脉型颈椎病患者行彩色多普勒超声检查观测椎动脉管腔结构、血管走行、血流信号等变化。
Methods A total of 2732 cases with highly suspected as vertebrobasilar insufficiency were applied with CDU. The vascular morphological changes and hemodynamics of the vertebral artery were observed.
方法对2732例疑诊为椎动脉型颈椎病患者行彩色多普勒超声检查观测椎动脉管腔结构、血管走行、血流信号等变化。
Methods A total of 2732 cases with highly suspected as vertebrobasilar insufficiency were applied with CDU. The vascular morphological changes and hemodynamics of the vertebral artery were observed.
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