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Velocity and Acceleration of a Wave00:51

Velocity and Acceleration of a Wave

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A wave propagates through a medium with a constant speed, known as a wave velocity. It is different from the speed of the particles of the medium, which is not constant. In addition, the velocity of the medium is perpendicular to the velocity of the wave. The variable speed of the particles of the medium implies that there must be acceleration associated with it. 
The velocity of the particles can be obtained by taking the partial derivative of the position equation with respect to time....
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Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches01:23

Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches

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Biopharmaceutical studies constitute a vital field aiming to enhance drug delivery methods and refine therapeutic approaches, drawing upon diverse interdisciplinary knowledge. In research methodologies, the choice between controlled and non-controlled studies significantly influences the study's reliability and accuracy.
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...
475
Simplified Synchronous Machine Model01:30

Simplified Synchronous Machine Model

798
The Synchronous Machine Model is a fundamental tool in analyzing and ensuring the transient stability of power systems. This model simplifies the representation of a synchronous machine under balanced three-phase positive-sequence conditions, assuming constant excitation and ignoring losses and saturation. The model is pivotal for understanding the behavior of synchronous generators connected to a power grid, particularly during transient events.
In this model, each generator is connected to a...
798
Wind Turbine Machine Models01:24

Wind Turbine Machine Models

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In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability.
Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
614
Pulse01:16

Pulse

2.2K
When the heart pumps blood out, arterial elastic fibers play a crucial role in sustaining a high-pressure gradient. They expand to accommodate the received blood and then recoil - a process known as the pulse that can be either manually palpated or electronically quantified. Despite a reduction in its effect with increased distance from the heart, elements of the pulse's systolic and diastolic components persist, observable even at the arteriole level.
The pulse serves as a clinical...
2.2K
Pulse01:05

Pulse

4.2K
The pulse is one of the most fundamental physiological indicators of the body's cardiovascular health. It is the rhythmic expansion and contraction of the arterial walls in response to the pressure generated by the heart's pumping action.
Pulse Rate and its Significance
Pulse rate, often measured in beats per minute (bpm), reflects the heart rate (HR), which is influenced by numerous factors such as stress, physical activity, and hormonal changes. A normal resting adult pulse rate falls...
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Updated: Feb 14, 2026

Ultrasound-based Pulse Wave Velocity Evaluation in Mice
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Ultrasound-based Pulse Wave Velocity Evaluation in Mice

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在受控的体外血管模型中估计脉冲波速度:基准测试机器学习方法.

Daniel Barvik1, Martin Černý1, Michal Prochazka1

  • 1Department of Cybernetics and Biomedical Engineering, VSB-Technical University of Ostrava, 17. Listopadu 2172/15, 708 00 Ostrava, Czech Republic.

Sensors (Basel, Switzerland)
|February 13, 2026
PubMed
概括

这项研究表明,一种新方法可以准确地估计人造循环系统中的血管刚性和脉冲波速度 (PWV). 这项研究验证了在心血管研究中潜在使用的管道.

关键词:
适应性神经模糊推理系统物理血管模型 物理血管模型脉冲波的速度是脉冲波的速度.这是一个回归回归的回归.

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Pulse Wave Velocity Testing in the Baltimore Longitudinal Study of Aging
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相关实验视频

Last Updated: Feb 14, 2026

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Measuring the Carotid to Femoral Pulse Wave Velocity Cf-PWV to Evaluate Arterial Stiffness
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Pulse Wave Velocity Testing in the Baltimore Longitudinal Study of Aging
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科学领域:

  • 生物医学工程 生物医学工程
  • 流体动力学 流体动力学
  • 材料科学 材料科学 材料科学

背景情况:

  • 精确估计动脉硬度和脉冲波速度 (PWV) 对于评估心血管健康至关重要.
  • 试验室模型提供了一个可控的环境来开发和验证新的测量技术.

研究的目的:

  • 评估在人工容器中估计刚度参数和PWV的可行性.
  • 为了对神经模糊推理系统与其他机器学习模型进行硬度预测的基准测试.
  • 用硬度衍生弹性和Moens-Korteweg方程来评估PWV估计的准确性.

主要方法:

  • 使用受控的体外循环装置,使用不同硬度和厚度的容器.
  • 提取同步压力和电容波形,识别信托点和工程特征.
  • 使用Sugeno类型的自适应神经模糊推理系统 (ANFIS) 进行硬度预测,与回归和ML/DL模型相比.
  • 使用硬度-弹性转换和Moens-Korteweg配方计算PWV,与参考PWV进行比较.

主要成果:

  • 拟议的管道显示出与参考标签和在受控的体外条件下的测量有很强的一致性.
  • 在预测船舶硬度水平方面,ANFIS模型显示出具有竞争力的性能.
  • 从开发的方法中得出的PWV估计与参考测量非常一致.

结论:

  • 该研究成功验证了在体外环境中估计度参数和PWV的管道.
  • 这些发现支持这种方法在心血管研究中的潜力,等待进一步的体内验证.
  • 未来的工作需要对生理学应用进行外部验证,校准和强度测试.