The researchers have devised a method that allows the generation of energy by converting low-frequency vibrations from body movement, heartbeat, blood flow, and the wind into electricity.
这项研究成果可以将人体移动，心跳，血流等低频振动转化为电能。
The blood flow frequency imaging of peritrophoblastic artery flowing was searching by pulse Doppler, it was high extending flow and low resistance.
用彩色能量图显示低速血流，用脉冲多普勒寻找高舒张期低阻力滋养动脉血流频谱。
Objective To observe the effect of high frequency vibration flow on the distribution of blood flow of organism.
目的探讨高频率振动流对血流分布的影响。
Even if the sampling rate is high, the method makes part of a low blood flow signal clearly visible in frequency domain, and more detailed blood flow sonogram can be obtained.
该方法可以在高采样频率条件下实现低流速血流信号的局部可视化，同时由于局部范围内采样分辨率的提高，将获得更细致的血流声谱图。
A dynamic programming algorithm based on the global optimization is presented to extract the maximum frequency waveform of the Doppler ultrasound blood flow signal.
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。
Objective to analyze sonography and the blood flow in wrapping canine fusiform aneurysm with biofilm, and to evaluate the value of high frequency ultrasound (HFUS) simultaneously.
目的分析人造生物膜包裹动脉瘤的声像图特点和血流变化情况，探讨高频超声(HFUS)在实验性动脉瘤包裹治疗术中的价值。
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.
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。
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.
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。
Result Wavelet scalogram of blood flow ultrasonic signal had a higher distinguishability than STFT spectrogram in the low frequency portion, but had poorer decussation terms than spectrogram.
结果通过血流多普勒信号的小波尺度图研究科室，发现利用小波尺度图可以眼科提高血流多普勒信号低频段的频谱分辨率。
Objective To learn changes in cerebral hemodynamics and characteristics of blood flow frequency spectrum of neonates with hypoxic-ischemic encephalopathy (HIE) and their clinical significance.
目的：研究缺氧缺血性脑病(HIE)患儿脑血流动力学变化及血流频谱特点，并探讨其临床意义。
Methods Peak systolic blood flow changes of carotid artery and basilar artery in the patterns and frequency were observed by Transcranial Doppler in 94 cases of hypertension.
方法利用经颅多普勒检测94例高血压病的颈内动脉和基底动脉收缩峰血流的改变及频普的形态。
They may behave as no blood flow signals and the frequency spectrum straightened.
CDFI示无血流信号或血流频谱变直。
They may behave as no blood flow signals and the frequency spectrum straightened.
CDFI示无血流信号或血流频谱变直。
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