Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Time and frequency -Domain Interpretation of Phase-lead Control

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...

Plotting and Calibrating the Root Locus

Plotting and Calibrating the Root Locus

Root loci often diverge as system poles shift from the real axis to the complex plane. Key points in this transition are the breakaway and break-in points, indicating where the root locus leaves and reenters the real axis. The branches of the root locus form an angle of 180/n degrees with the real axis, where n is the number of branches at a breakaway or break-in point.
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is observed...

Phase-lead and Phase-lag Controllers

Phase-lead and Phase-lag Controllers

Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass filters, manage...

The Phase Rule

The Phase Rule

The phase rule describes the relationship between the variance (degrees of freedom), the number of components, and the number of phases in a system at equilibrium.Variance is a concept that denotes the number of independent intensive properties (properties are those that do not depend on the amount of material in the system), such as temperature, pressure, and composition, that can be altered without impacting the number of phases in equilibrium.In a single-component system, such as pure water,...

Time and frequency -Domain Interpretation of PI Control

Time and frequency -Domain Interpretation of PI Control

Proportional-Integral (PI) controllers are essential in many control systems to improve stability and performance. They are commonly used in everyday devices like thermostats to enhance system damping and reduce steady-state error. When the zero in the controller's transfer function is optimally placed, the system benefits significantly in terms of stability and accuracy.
Acting as a low-pass filter, the PI controller slows the system's response and extends settling times. This requires careful...

Transfer function and Bode Plots-II

Transfer function and Bode Plots-II

In the standard form, the transfer function is shown in constant gain, poles/zeros at origin, simple poles/zeros, and quadratic poles/zeros; each contributing uniquely to the system's overall response. The term represents the magnitude of the simple zero:

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Mass spectrometry-based proteomics to study gastric carcinogenesis: pathophysiological molecular characterization.

Scientific reports·2026

Same author

Wavelet analysis of postural stability reveals age-related differences in spectral response patterns during adaptation to immersive virtual reality.

Scientific reports·2026

Same author

Tackling Post-Endoscopy Gastric Cancer in a Low-Risk Area: Prevalence, Features, and Prevention Opportunities Through Better Clinical Practice.

United European gastroenterology journal·2025

Same author

Event-Triggered Control and Communication for Single-Master Multislave Teleoperation Systems With Try-Once-Discard Protocol.

IEEE transactions on cybernetics·2025

Same author

Sensorimotor and Sex Influence on Spatial Orientation when Sitting and Standing.

Perceptual and motor skills·2025

Same author

Transthoracic impedance variability to assess quality of chest compression in out-of-hospital cardiac arrest.

Acta anaesthesiologica Scandinavica·2024

Search research articles

Related Experiment Video

Updated: Jul 10, 2026

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Published on: August 30, 2013

An algorithm for phase-space detection of the P characteristic points.

Alberto Herreros¹, Enrique Baeyens, José Ramón Peran

¹Depto. de Ingeniería de Sistemas y Automática, University of Valladolid, Spain. albher@eis.uva.es

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|November 16, 2007

Summary

A novel algorithm uses embedding phase space to accurately detect electrocardiogram (ECG) P-wave points. This method is robust against noise and morphology variations in ECG signals.

More Related Videos

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Related Experiment Videos

Last Updated: Jul 10, 2026

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Detection of Architectural Distortion in Prior Mammograms via Analysis of Oriented Patterns

Published on: August 30, 2013

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Area of Science:

Biomedical Engineering
Signal Processing
Cardiology

Background:

Electrocardiogram (ECG) analysis is crucial for diagnosing cardiac conditions.
Accurate detection of P-wave characteristic points is essential for ECG interpretation.
Existing methods face challenges with noise and signal variability.

Purpose of the Study:

To introduce a new algorithm for detecting P-wave characteristic points in multi-lead ECG signals.
To enhance the robustness of P-wave detection against various signal interferences.
To provide a reliable tool for automated ECG analysis.

Main Methods:

The algorithm employs embedding phase space to represent ECG signals.
Similar ECG morphologies are mapped to proximate points in the phase space using a distance measure.
The method focuses on detecting onset, peak, and end points of the P-wave.

Main Results:

The algorithm demonstrates robustness against different characteristic point selections.
It effectively handles morphology changes, baseline oscillations, and high-frequency noise.
Successful validation was achieved using both simulated and real ECG data.

Conclusions:

The proposed embedding phase space algorithm offers a robust and accurate method for P-wave detection.
This technique has significant potential for improving automated ECG interpretation systems.
The algorithm's resilience to common ECG signal artifacts makes it clinically relevant.