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

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

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.

Double Resonance Techniques: Overview

Double Resonance Techniques: Overview

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...

You might also read

Related Articles

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

Sort by

Same author

Optimized Design of the Basic Structure of Dry-Coupled Shear Wave Probe for Ultrasonic Testing of Rock and Concrete.

Sensors (Basel, Switzerland)·2025

Same author

Uniform zinc oxide nanowire arrays grown on nonepitaxial surface with general orientation control.

Nano letters·2013

Same author

[American head and neck surgery progress of in 2012].

Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery·2013

Same author

A compact thermo-optical multimode-interference silicon-based 1 × 4 nano-photonic switch.

Optics express·2013

Same author

Experimental demonstration of 110-Gb/s unsynchronized band-multiplexed superchannel coherent optical OFDM/OQAM system.

Optics express·2013

Same author

Potentially functional variants of p14ARF are associated with HPV-positive oropharyngeal cancer patients and survival after definitive chemoradiotherapy.

Carcinogenesis·2013

Search research articles

Related Experiment Video

Updated: Jun 10, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

High-Resolution Dipole Remote Detection Logging Based on Optimal Nonlinear Frequency Modulation Excitation.

Xueshen Cao^1,2,3, Hao Chen^1,2,3, Chao Li^1,2,3

¹State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.

Sensors (Basel, Switzerland)

|October 16, 2024

Summary

A new optimal nonlinear frequency modulation (ONLFM) excitation method enhances dipole remote detection logging. This advanced technique improves signal-to-noise ratio (SNR) and resolution, leading to better detection range and imaging quality.

Keywords:

dipole logging nonlinear frequency modulation optimization remote detection

More Related Videos

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Published on: December 29, 2015

Real-Time, Two-Color Stimulated Raman Scattering Imaging of Mouse Brain for Tissue Diagnosis

Real-Time, Two-Color Stimulated Raman Scattering Imaging of Mouse Brain for Tissue Diagnosis

Published on: February 1, 2022

Related Experiment Videos

Last Updated: Jun 10, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Label-free Single Molecule Detection Using Microtoroid Optical Resonators

Published on: December 29, 2015

Real-Time, Two-Color Stimulated Raman Scattering Imaging of Mouse Brain for Tissue Diagnosis

Real-Time, Two-Color Stimulated Raman Scattering Imaging of Mouse Brain for Tissue Diagnosis

Published on: February 1, 2022

Area of Science:

Geophysics
Signal Processing

Background:

Dipole remote detection logging requires improved detection range and imaging resolution.
Traditional electric pulse sound sources have limitations in energy and frequency band range.

Purpose of the Study:

To propose an optimal nonlinear frequency modulation (ONLFM) excitation method for dipole remote detection logging.
To enhance the signal-to-noise ratio (SNR) and resolution of reflected waves.

Main Methods:

Designed an optimal waveform model for the sound source using SNR and resolution as objective functions.
Employed a multi-constraint optimization approach solved with the simulated annealing method.
Utilized the stationary phase principle to design the ONLFM waveform based on the optimal spectrum.

Main Results:

The ONLFM sound source demonstrated improved energy and extended frequency band range compared to traditional methods.
Simulations confirmed effective enhancement of SNR and resolution of reflected waves.
The ONLFM method leads to improved detection range and imaging resolution in dipole shear wave remote detection.

Conclusions:

The proposed ONLFM excitation method significantly improves the performance of dipole remote detection logging.
This technique offers a viable solution for achieving higher resolution and extended detection ranges in geophysical exploration.