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

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)01:15

Insensitive Nuclei Enhanced by Polarization Transfer (INEPT)

1.2K
Insensitive Nuclei Enhanced by Polarization Transfer (INEPT) is an advanced Nuclear Magnetic Resonance (NMR) technique specifically designed to detect and enhance the signals of low-abundance nuclei, such as carbon-13 and nitrogen-15, in small molecules. The fundamental principle behind INEPT is the transfer of polarization from a more abundant and highly polarizable nucleus, typically hydrogen-1, to the low-abundance nucleus of interest. This process effectively boosts the NMR signal of the...
1.2K
Potential Due to a Polarized Object01:29

Potential Due to a Polarized Object

903
A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...
903
IR Spectrum Peak Intensity: Dipole Moment01:20

IR Spectrum Peak Intensity: Dipole Moment

1.8K
The dipole moment of a bond is the product of the partial charge on either atom and the distance between them. Dipole moments influence the efficiency of IR absorption and the peak intensity. When a bond with a dipole moment is placed in an electric field, the direction of the field determines if the bond is compressed or stretched. Electromagnetic radiation consists of an electric field component that rapidly reverses direction. It follows that polar bonds are alternately stretched and...
1.8K
Measuring Reaction Rates03:09

Measuring Reaction Rates

33.2K
Polarimetry finds application in chemical kinetics to measure the concentration and reaction kinetics of optically active substances during a chemical reaction. Optically active substances have the capability of rotating the plane of polarization of linearly polarized light passing through them—a feature called optical rotation. Optical activity is attributed to the molecular structure of substances. Normal monochromatic light is unpolarized and possesses oscillations of the electrical...
33.2K
Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

1.8K
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...
1.8K
IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations01:08

IR Spectrum Peak Splitting: Symmetric vs Asymmetric Vibrations

2.2K
Identical bonds within a polyatomic group can stretch symmetrically (in-phase) or asymmetrically (out-of-phase). Similar to hydrogen bonding, these vibrations also influence the shape of the IR peak. Generally, asymmetric stretching frequencies are higher than symmetric stretching frequencies. For example, primary amines exhibit two distinct IR peaks between 3300–3500 cm−1 corresponding to the symmetric and asymmetric N-H stretching, while secondary amines exhibit a single...
2.2K

You might also read

Related Articles

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

Sort by
Same author

Genomic Characterization Provides New Insights for Detailed Phage- Resistant Mechanism for <i>Brucella abortus</i>.

Frontiers in microbiology·2019
Same author

A novel ECG signal compression method using spindle convolutional auto-encoder.

Computer methods and programs in biomedicine·2019
Same author

Erratum: Publisher Correction: A c-di-AMP riboswitch controlling <i>kdpFABC</i> operon transcription regulates the potassium transporter system in <i>Bacillus thuringiensis</i>.

Communications biology·2019
Same author

Incidence, aetiology, and serotype spectrum analysis of adult hand, foot, and mouth disease patients: A retrospective observational cohort study in northern Zhejiang, China.

International journal of infectious diseases : IJID : official publication of the International Society for Infectious Diseases·2019
Same author

[Hydrochemical Characteristics and Possible Controls of Groundwater in the Xialatuo Basin Section of the Xianshui River].

Huan jing ke xue= Huanjing kexue·2019
Same author

Negative Pressure Wound Therapy for Surgical-site Infections: A Randomized Trial.

Annals of surgery·2019

Related Experiment Video

Updated: Mar 25, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.1K

Angle-Polarization Estimation for Coherent Sources with Linear Tripole Sensor Arrays.

Kun Wang1, Jin He2, Ting Shu3

  • 1Department of Electronic Engineering, Nanjing University of Science and Technology, Nanjing 210094, China. wk_1024@163.com.

Sensors (Basel, Switzerland)
|February 25, 2016
PubMed
Summary

This study introduces a novel parallel factor (PARAFAC) analysis algorithm for estimating angle and polarization of multiple coherent sources. The method enhances accuracy without spatial smoothing, offering unique determination of signal parameters.

Keywords:
angle estimationparallel factorpolarization estimationtripole sensor

More Related Videos

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

12.0K
Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy
05:54

Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy

Published on: September 8, 2023

2.0K

Related Experiment Videos

Last Updated: Mar 25, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.1K
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

12.0K
Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy
05:54

Author Spotlight: Non-Invasive Imaging of Complex Bio-Structures Using Polarization-Sensitive Two-Photon Microscopy

Published on: September 8, 2023

2.0K

Area of Science:

  • Signal Processing
  • Electromagnetics
  • Array Signal Processing

Background:

  • Estimating angle and polarization of multiple coherent sources is challenging due to signal coherency.
  • Traditional methods often require spatial or vector-field smoothing, which can degrade performance.
  • Uniformly-spaced linear tripole sensor arrays offer potential for improved source parameter estimation.

Purpose of the Study:

  • To develop a novel algorithm for angle and polarization estimation of multiple coherent sources.
  • To leverage parallel factor (PARAFAC) analysis for enhanced estimation accuracy without signal decorrelation preprocessing.
  • To determine the conditions for unique estimation of coherent signal parameters using tripole arrays.

Main Methods:

  • Proposed a parallel factor (PARAFAC) analysis-based algorithm utilizing the spatial signature of a uniformly-spaced linear tripole sensor array.
  • Formulated a PARAFAC model to directly handle coherent signals, eliminating the need for spatial or vector-field smoothing.
  • Established the theoretical condition for unique angle-polarization parameter determination: number of tripoles L ≥ 2K - 1, where K is the number of signals.

Main Results:

  • The PARAFAC-based algorithm successfully estimates angle and polarization of multiple coherent sources without spatial smoothing.
  • Unique determination of K coherent signal parameters is achievable with L ≥ 2K - 1 tripoles.
  • Extending tripole interspacing beyond a half wavelength further enhances angle and polarization estimation accuracy.

Conclusions:

  • The proposed PARAFAC analysis algorithm provides an effective and accurate method for angle and polarization estimation of multiple coherent sources.
  • The algorithm overcomes limitations of traditional smoothing techniques, offering superior performance.
  • This approach offers a robust solution for advanced radar, sonar, and communication systems.