Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Atomic Nuclei: Magnetic Resonance01:05

Atomic Nuclei: Magnetic Resonance

663
The number of nuclear spins aligned in the lower energy state is slightly greater than those in the higher energy state. In the presence of an external magnetic field, as the spins precess at the Larmor frequency, the excess population results in a net magnetization oriented along the z axis. When a pulse or a short burst of radio waves at the Larmor frequency is applied along the x axis, the coupling of frequencies causes resonance and flips the nuclear spins of the excess population from the...
663
Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

657
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
657
Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

214
Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
214
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

700
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
700
Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

5.2K
Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
5.2K
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

617
The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
617

You might also read

Related Articles

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

Sort by
Same author

Mechanical Tuning of Intrinsic Chirality in a Bilayer Electromagnetic Metamaterial via Out-of-Plane Rotation.

ACS applied materials & interfaces·2026
Same author

Application of Terahertz Technology in Food Safety: Rice Origin-Variety Classification Based on Spectral Analysis and Machine Learning.

Foods (Basel, Switzerland)·2026
Same author

Nanomaterials Driving Technological Advancements in Enhanced Oil Recovery from Low-Permeability Tight Oil Reservoirs: Opportunities and Challenges.

Nanomaterials (Basel, Switzerland)·2026
Same author

Theoretical quantitative model and clinical outcome predictions of conductive cardiac patches for electrophysiological treatments.

Nature biomedical engineering·2026
Same author

Corona-Driven Electrostatic Self-Assembly of Tunable Liquid Lenses via Local Field Confinement.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

MBFTFuse: A Triple-Path Adversarial Network Based on Modality Balancing and Feature-Tracing Compensation for Infrared and Visible Image Fusion.

Sensors (Basel, Switzerland)·2026

Related Experiment Video

Updated: Jul 10, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.6K

Magnetic Anomaly Detection Based on a Compound Tri-Stable Stochastic Resonance System.

Jinbo Huang1, Zhen Zheng1, Yu Zhou1

  • 1School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.

Sensors (Basel, Switzerland)
|November 25, 2023
PubMed
Summary

A new compound tri-stable stochastic resonance (CTSR) model improves weak magnetic anomaly detection in noisy environments. This advanced model offers better noise utilization and parameter control than traditional methods.

Keywords:
compound tri-stablemagnetic anomaly detectionsignal-to-noise ratiostochastic resonance

More Related Videos

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System
06:58

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System

Published on: June 13, 2010

9.7K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.5K

Related Experiment Videos

Last Updated: Jul 10, 2025

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples
07:01

Frequency Mixing Magnetic Detection Scanner for Imaging Magnetic Particles in Planar Samples

Published on: June 9, 2016

9.6K
Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System
06:58

Rapid Homogeneous Detection of Biological Assays Using Magnetic Modulation Biosensing System

Published on: June 13, 2010

9.7K
Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement
09:43

Optimized Setup and Protocol for Magnetic Domain Imaging with In Situ Hysteresis Measurement

Published on: November 7, 2017

9.5K

Area of Science:

  • Signal processing
  • Nonlinear dynamics
  • Geophysics

Background:

  • Bi-stable stochastic resonance (BSR) models struggle with parameter coupling for weak signal detection.
  • Conventional tri-stable stochastic resonance (TTSR) models exhibit severe system parameter coupling, hindering potential function regulation.
  • Strong background noise necessitates advanced models for effective weak signal detection.

Purpose of the Study:

  • To propose a novel compound tri-stable stochastic resonance (CTSR) model for enhanced weak magnetic anomaly signal detection.
  • To overcome the parameter coupling limitations of conventional tri-stable models.
  • To develop a robust detection system with improved noise utilization and parameter adjustability.

Main Methods:

  • A compound tri-stable stochastic resonance (CTSR) model was developed by integrating a Gaussian Potential model with a mixed bi-stable model.
  • A weak magnetic anomaly signal detection system was designed, incorporating the CTSR system and a statistical analysis-based judgment system.
  • System parameters were optimized using a quantum genetic algorithm (QGA) to maximize the output signal-to-noise ratio (SNR).

Main Results:

  • The CTSR system demonstrated superior performance compared to traditional tri-stable stochastic resonance (TTSR) and bi-stable stochastic resonance (BSR) systems.
  • The CTSR system achieved a detection probability approaching 80% even with an input SNR of -8 dB.
  • The developed system successfully detected weak magnetic anomaly signals and preserved information regarding the relative motion (heading) of ferromagnetic targets.

Conclusions:

  • The proposed CTSR model effectively addresses parameter coupling issues in tri-stable systems.
  • The CTSR system offers significant improvements in weak signal detection under strong background noise conditions.
  • This advanced detection system provides a robust solution for identifying magnetic anomalies and target motion information.