Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Pulse rhythm01:30

Pulse rhythm

815
Pulse rhythm refers to the pattern of pulsations within specific intervals, offering valuable insights into the regularity or irregularity of the heart's beats as observed through the pattern of pulsation within specific intervals. A regular pulse exhibits a consistent heart rate with uniform waveforms and pulsation force, variations of which can be classified as normal, weak, or bounding.
Conversely, an irregular pulse pattern is termed dysrhythmia, stemming from disruptions in cardiac...
815
Regulation of Pulse01:20

Regulation of Pulse

1.3K
Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.
1.3K
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

595
Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:
595
Basic Discrete Time Signals01:16

Basic Discrete Time Signals

209
The unit step sequence is defined as 1 for zero and positive values of the integer n. This sequence can be graphically displayed using a set of eight sample points, showing a step function starting from n=0 and remaining constant thereafter.
The unit impulse or sample sequence is mathematically expressed as zero for all n values except at n=0, where it is one. The unit impulse sequence, denoted by δ(n), is the first difference of the unit step sequence, while the unit step sequence u(n) is...
209
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

818
A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.
818
Entropy Change in Reversible Processes01:10

Entropy Change in Reversible Processes

2.6K
In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
The statement can be further generalized to prove that entropy is a state function. Take a cyclic process between any two points on a p-V diagram.
2.6K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Orelabrutinib versus chemoimmunotherapy in treatment-naïve chronic lymphocytic leukemia/small lymphocytic lymphoma: a randomized, phase 3 trial.

Signal transduction and targeted therapy·2026
Same author

Predicting severe intraventricular hemorrhage in very preterm and/or very low birth weight infants: a nomogram approach.

Frontiers in pediatrics·2026
Same author

A comparison of pediatric sepsis definitions based on systemic inflammatory response syndrome and Phoenix criteria: a single-center PICU retrospective study.

Italian journal of pediatrics·2026
Same author

Knowledge, attitudes, and practices regarding hyperuricemia among physicians in internal medicine departments: a multicenter cross-sectional survey in China.

Frontiers in public health·2026
Same author

SPARC Drives Tubulointerstitial Fibrosis through Regulating the CBP-DOT1L Pathway.

International journal of biological sciences·2026
Same author

Biallelic pathogenic variants in <i>FLNB</i> are associated with paediatric steroid-resistant nephrotic syndrome via podocyte cytoskeletal dysfunction.

Journal of medical genetics·2026

相关实验视频

Updated: Jul 13, 2025

Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis
08:22

Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis

Published on: April 26, 2024

1.9K

脉率变量的快速变换在线分析与一个样本的递归回归.

Jianan Zhan1, Zhengli Gan1, Lijuan Chou2

  • 1School of Electrical and Automatic Engineering, Changshu Institute of Technology, Suzhou, 215500, China.

Medical engineering & physics
|October 14, 2023
PubMed
概括
此摘要是机器生成的。

一个新的快速转换 (FPE) 算法显著加速心血管疾病监测,使用可穿戴设备上的脉冲率变化 (PRV) 信号. 这项创新使实时分析成为可能,将心律失常检测准确度提高到85.43%.

关键词:
在线处理在线处理.随机变化的 Entropy 是一个变量.便携式可穿戴设备是可以携带的可穿戴设备.脉冲信号是一个脉冲信号.脉冲率的变化,脉冲率的变化

更多相关视频

Applications of EEG Neuroimaging Data: Event-related Potentials, Spectral Power, and Multiscale Entropy
11:15

Applications of EEG Neuroimaging Data: Event-related Potentials, Spectral Power, and Multiscale Entropy

Published on: June 27, 2013

33.8K
Using Wavelet Entropy to Demonstrate how Mindfulness Practice Increases Coordination between Irregular Cerebral and Cardiac Activities
08:08

Using Wavelet Entropy to Demonstrate how Mindfulness Practice Increases Coordination between Irregular Cerebral and Cardiac Activities

Published on: May 10, 2017

14.7K

相关实验视频

Last Updated: Jul 13, 2025

Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis
08:22

Author Spotlight: Advancing the Study of Brain-Heart Interplay with a Comprehensive EEGLAB Plugin for Multimodal Signal Analysis

Published on: April 26, 2024

1.9K
Applications of EEG Neuroimaging Data: Event-related Potentials, Spectral Power, and Multiscale Entropy
11:15

Applications of EEG Neuroimaging Data: Event-related Potentials, Spectral Power, and Multiscale Entropy

Published on: June 27, 2013

33.8K
Using Wavelet Entropy to Demonstrate how Mindfulness Practice Increases Coordination between Irregular Cerebral and Cardiac Activities
08:08

Using Wavelet Entropy to Demonstrate how Mindfulness Practice Increases Coordination between Irregular Cerebral and Cardiac Activities

Published on: May 10, 2017

14.7K

科学领域:

  • 生物医学工程 生物医学工程
  • 信号处理 信号处理
  • 心血管健康 心血管健康

背景情况:

  • 脉率变化 (PRV) 信号对于监测心血管健康至关重要,特别是在可穿戴设备中.
  • 标准的转换 (PE) 算法是有效的PRV分析,但实时应用程序的计算密集型.
  • 现有的方法在资源有限的可穿戴设备上高效处理PRV信号时面临挑战.

研究的目的:

  • 开发一个计算高效的算法来分析PRV信号,适合在可穿戴设备上进行在线处理.
  • 引入一个快速转换 (FPE) 算法,克服传统PE的局限性.
  • 为了验证FPE算法的准确性和性能,用于心血管监测和心律失常检测.

主要方法:

  • 开发了一种新的快速转换 (FPE) 算法,利用微处理器数据更新过程进行单个样本递归分析.
  • 使用模拟数据和来自"Fantasia数据库"的PRV信号来测试FPE算法.
  • 实施了一个低成本的可穿戴信号检测系统,以验证FPE的在线计算能力.

主要成果:

  • FPE算法显示出显著的速度改进,在模拟数据中比PE快211倍,在RRV信号中比PE快175倍.
  • FPE保持了高精度,模拟数据的根平均平方误差为0,RRV信号的处理时间为0.2秒以下.
  • 从FPE获得的基于值的特征在使用决策树识别危及生命的失律症时实现了85.43%的分类准确度.

结论:

  • 拟议的快速转换 (FPE) 算法为实时分析PRV信号提供了一种计算效率高,准确的方法.
  • FPE非常适合在可穿戴设备上的在线心血管疾病监测应用.
  • FPE算法显示了改善心血管疾病 (包括心律失常) 的检测的巨大潜力.