heart sound

The Study of Heart Sound Teletransmission and Analysis System

心音信号远程传输和分析系统的研究

互联网摘选

The correlation dimension is introduced to characterize quantitatively the complexity of heart sound.

本文提出利用关联维数来定量地对心音信号的复杂程度进行描述.

网络文摘精选

Increased pulmonic second heart sound and systolic murmur were the most frequent signs.

最常见的体征为肺动脉瓣区第2音亢进及收缩期杂音。

互联网摘选

Segmentation Algorithm of Heart Sound Based on Boundary Estimation in Time Domain

基于时域边界估计的心音信号分段算法

互联网摘选

The result shows that this method is able to recognize the heart sound efficiently, the recognition rate as high as 94.2 percent, and superior to BP neural network ( 92.2% vs 82.8%) in heart murmur recognition.

与人工神经网络的对照实验结果表明：该方法有较好的识别效果，识别率高达94.2%，尤其是在心杂音的识别率有明显的优势（92.2%vs82.8%）。

互联网摘选

The Third Heart Sound Analysis of Normal and Aiged with Coronary Heart Disease

正常人与冠心病患者的第三心音分析

互联网摘选

In order to find out the clinical significance of the third heart sound ( S3), the heart sound data was sampled at the precardium and lead I of ECG was recorded simultaneously to label heart.

研究第三心音（S3）在临床上的意义。在心前区采集心音数据，并采集一导心电信号来定位心音。

互联网摘选

Design and application of new indicators of cardiac reserve evaluation system based on heart sound

基于心音的心脏储备新指标评价系统的设计与实现

互联网摘选

This paper introduces several methods to measure cardiac function, including methods of FICK oxygen consumption, thermodilution, ultrasound cardiography, impedance cardiogram and the method with heart sound. Advantages and disadvantages of each method are discussed and compared.

几种心脏功能评价指标的检测方法：FICK氧消耗量法、热稀释法、超声心动图法、心阻抗图法以及利用心音评价心功能的一些进展，比较了各种方法的优势和局限性。

互联网摘选

A notebook computer based heart sound analysis instrument, consisting of phonocardiographic sensor, heart sound signal preprocessing box, notebook computer, printer, speakers, and heart sound signal processing software is introduced.

基于笔记本计算机的心音分析仪由心音传感器、心音信号预处理盒、笔记本计算机、打印机、音箱和心音信号处理软件组成。

互联网摘选

A monitoring system based on the relationship between cardiac contractility and heart sound was developed.

研究了基于心力—心音关系的心脏储备无创监测系统.

互联网摘选

A detection method of heart sound signals using Choi Williams distribution

一种基于Choi-Williams分布的心音信号检测方法

互联网摘选

Method The hardware design uses a P-ⅱ/ 233 multimedia microcomputer system, multi-channel A/ D converter, ECG electrodes, heart sound transducer, pulse transducer, and amplifiers and filters consisted with operation amplifiers.

【方法】本系统的硬件设计采用奔腾Ⅱ/233多媒体微机系统，多路模/数转换器和心电电极、心音传感器、脉搏波传感器及由运算放大器等构成相关的放大器及滤波器。

互联网摘选

Design of heart sound processing analog circuit based on the electret capacitor microphone

基于驻极体电容传声器的心音模拟处理电路的设计

互联网摘选

Comparison and analyses of heart sound of congenital heart disease based on STFT and CWT

基于短时傅立叶变换和连续小波变换的先天性心脏病心音比较分析研究

互联网摘选

Heart sound recording is decomposed into a series of time-frequency atoms, characterized by amplitude, time, frequency, duration by the modified matching pursuit method.

首先利用改进的匹配追踪算法将含有噪声的心音信号分解为一系列表征为幅度、时间、频率等参数的原子。

互联网摘选

This paper details a full set of plan of the computer aided teaching of heart sound.

详细阐述了计算机辅助心音教学系统的实现方案。

互联网摘选

Objective To develop a new segmentation algorithm of heart sound without ECG signal as reference.

目的实现心音信号的自动分段:第一心音、收缩期、第二心音、舒张期.

网络文摘精选

The results showed that the first heart sound energy fraction were significantly different in the normal group and the heart murmur group.

试验结果表明，在正常组和返流性心脏杂音组间，第一心音能量分数存在显著性差异。

互联网摘选

A Wavelet Transform Time Frequency Analysis of the Third and Fourth Heart Sound of Old People

老年人第三第四心音信号小波变换时频分析研究

互联网摘选

Objective To study the effect of exercise and breathing on heart rate and amplitude of heart sound using digital phonocardiogram.

目的用数字心音图探索运动和呼吸对心率及心音幅值的影响。

互联网摘选

So in this paper a recognition algorithm of heart sound based on probabilistic neural networks ( PNN) is proposed to improve the accuracy of heart sound recognition.

在综合分析以前各种心音识别算法的基础上，本文提出了一种基于概率神经网络PNN的心音信号识别算法，将概率神经网络作为心音信号分类器，取得了较好的识别效果。

互联网摘选

Heart sound teletransmission and seamless access can be implemented based on characteristics of GPRS such as wide network coverage, high security, wide bandwidth and so on.

利用GPRS网络覆盖广、安全性高、数据传输速率较高的特性可实现心音信号的远程传输和无缝接入。

互联网摘选

Are all the reasons of the heart sound?

出自心灵的理性是否全都合理?

哲学部分

This paper also introduce a non-intrusive method for evaluate cardiac reserve, based on D/ S ratio attracted from heart sound.

文中还从心脏本身供血程度和心脏搏动的机理分析，提出了基于D/S值来检测和评估心脏储备无创性检测方法。

互联网摘选

A Study on Effect of Exercise and Breathing on Heart Rate and Amplitude of Heart Sound

运动和呼吸对心率及心音幅值影响的探讨

互联网摘选