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相关概念视频

Design Example01:23

Design Example

317
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
317

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相关实验视频

Updated: Jun 10, 2025

Author Spotlight: Exploring Breathing Techniques and Digital Solutions for Enhancing Running Performance
06:26

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一种用于便携式设备的自动咳计数方法和系统构造.

Yixuan Wang1, Kehaoyu Yang2,3, Shaofeng Xu2,3

  • 1Engineering Training Centre, Beihang University, Beijing, China.

Frontiers in bioengineering and biotechnology
|October 14, 2024
PubMed
概括
此摘要是机器生成的。

这项研究开发了一种可穿戴设备,用于自动计数咳,达到93.24%的准确性. 该系统可以长期监测咳,以改善呼吸系统疾病的管理.

关键词:
梅尔的频率是塞普斯特勒姆系数的系数.咳计数正在进行中.便携式设备 便携式设备 是一种便携式设备.短时间的特色短暂的功能.支持矢量机器的支持矢量机器

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科学领域:

  • 生物医学工程 生物医学工程
  • 信号处理 信号处理
  • 呼吸系统医学 呼吸系统医学

背景情况:

  • 咳是呼吸系统疾病的一个关键症状.
  • 长时间的咳监测有助于临床诊断.
  • 咳频率是肺部健康的重要指标.

研究的目的:

  • 设计一个自动咳计数系统.
  • 为了使每分钟咳频率的长期监测.
  • 开发一种可穿戴设备,用于持续咳评估.

主要方法:

  • 一个咳计数系统,涉及去,分段提取,固有值计算和识别.
  • 算法基于50名患者的音频,使用短时间特征和Mel频率塞普斯特尔系数 (MFCC).
  • 开发一个带有获取和接收软件的可穿戴设备.

主要成果:

  • 获得了93.24%的准确性,97.58%的灵敏度,86.97%的特异性和94.47%的F1分数.
  • 卡帕值为0.9209,平均计数误差为每分钟0.46个计数.
  • 平均运行时间为2.80±2.27秒,证明了实时性能.

结论:

  • 该系统比现有方法提供了更好的准确性,实时性能和计算速度.
  • 这种可穿戴设备有助于长期监测患者的咳.
  • 适用于具有有限计算能力的便携式设备,用于持续健康评估.