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相关概念视频

Sleep Apnea01:21

Sleep Apnea

496
Sleep apnea is a condition where breathing stops intermittently during sleep, often leading to significant health issues. Each episode can last from 10 to 20 seconds or more and is frequently accompanied by a brief arousal from sleep. This disturbance, largely unnoticed by the individual, can lead to severe daytime fatigue. Commonly, individuals seek help after being informed by their partners about loud snoring and noticeable breathing pauses during sleep.
The condition is more prevalent among...
496
Control Volume and System Representations01:16

Control Volume and System Representations

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Two key frameworks are employed to analyze mass, energy, and momentum transfer: the control volume approach and the system approach. These frameworks offer different perspectives, depending on whether the focus is on a specific region in space (control volume approach) or a defined mass of fluid (system approach).
The control volume approach considers a stationary region in space through which fluid flows. This region is bounded by a control surface.  For instance, in the case of water...
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State Space Representation01:27

State Space Representation

536
The frequency-domain technique, commonly used in analyzing and designing feedback control systems, is effective for linear, time-invariant systems. However, it falls short when dealing with nonlinear, time-varying, and multiple-input multiple-output systems. The time-domain or state-space approach addresses these limitations by utilizing state variables to construct simultaneous, first-order differential equations, known as state equations, for an nth-order system.
Consider an RLC circuit, a...
536
Insufficient Sleep and Sleep Deprivation01:13

Insufficient Sleep and Sleep Deprivation

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Insufficient sleep refers to not getting the recommended amount of sleep for optimal functioning, even if it's just slightly less than needed. Sleep insufficiency may occur due to lifestyle choices, such as staying up late for social events or work, resulting in routinely getting less sleep than required. For example, consistently sleeping 6 hours when the body needs 7-9 hours can lead to cumulative effects on health and well-being.
Sleep deprivation is a more severe form of sleep loss...
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Graphical and Analytic Representation of Sinusoids01:20

Graphical and Analytic Representation of Sinusoids

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Analyzing two sinusoidal voltages with equal amplitude and period but different phases on an oscilloscope, an instrument used to display and analyze waveforms, involves a three-step process.
The first step is measuring the peak-to-peak value, which is twice the amplitude of the sinusoid. This provides information about the maximum voltage swing of the waveform.
Secondly, the period and angular frequency are determined. The period is the time taken for one complete cycle of the waveform, while...
921
Vector Representation of Complex Numbers01:16

Vector Representation of Complex Numbers

496
Complex numbers, represented in Cartesian coordinates, can also be visualized as vectors. These vectors can be expressed in polar form, emphasizing their magnitude and angle. When a complex number is input into a function, the output is another complex number, highlighting the function's zero point from which the vector representation can originate.
Consider a function defined as the product of the complex factors in the numerator divided by the product of the complex factors in the...
496

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Drug-Induced Sleep Endoscopy DISE with Target Controlled Infusion TCI and Bispectral Analysis in Obstructive Sleep Apnea
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自主监督的语音表示用于睡眠呼吸暂停严重程度预测.

Behrad TaghiBeyglou, Jiahao Geng, Dominick McDaulid

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    语音分析显示了查阻塞性睡眠呼吸暂停 (OSA) 的前景. 这种方法可以使用母音来评估OSA风险和严重程度,为传统诊断提供了经济有效的替代方案.

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    科学领域:

    • 睡眠医学 睡眠医学
    • 生物医学工程 生物医学工程
    • 语音处理 语音处理

    背景情况:

    • 阻塞性睡眠呼吸暂停 (OSA) 很常见,但往往没有被诊断出来.
    • 多人睡眠学 (PSG) 是黄金标准,但资源密集型.
    • 语音特征与OSA有关,可能提供一种查替代方案.

    研究的目的:

    • 开发一个基于语音的管道用于OSA查和严重程度估计.
    • 使用自主监督学习 (SSL) 和多模式声学功能.
    • 为了克服以前基于语音的OSA研究仅关注声学特征的局限性.

    主要方法:

    • 一个新的融合框架,结合SSL衍生的语音表示和传统的声学特征.
    • 对于OSA查和呼吸暂停-呼吸暂停指数 (AHI) 估计,对清醒期间的元音发音的分析.
    • 从三个研究站点的不同参与者收集的数据.

    主要成果:

    • 在女性中,OSA查的平衡精度为0.79 (AHI ≥10) 和0.74 (AHI ≥30),在男性中为0.80和0.78.
    • AHI估计显示女性平均绝对误差为12.0事件/小时 (r=0.63),男性平均误差为14.7事件/小时 (r=0.52).
    • 这些模型显示了跨不同人口群体的概括性.

    结论:

    • 语音,特别是母音发音,是OSA风险和严重程度的可行的生物标志物.
    • 这种基于语音的方法为OSA查提供了一种低负担,成本效益的方法.
    • 这些发现对可扩展的睡眠健康评估有重大影响.