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 Experiment Videos

Estimation of time-varying coherence function using time-varying transfer functions.

He Zhao1, Rui Zou, Ki H Chon

  • 1Dept. of Biomedical Eng., State Univ. of New York, Stony Brook, NY, USA.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 3, 2007
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Pd Icosahedral Nanoparticles Promote Skin Wound Healing by Enhancing SP1-HBEGF Axis-Mediated Keratinocytes Proliferation.

International journal of nanomedicine·2025
Same author

Constructing multilayer PPI networks based on homologous proteins and integrating multiple PageRank to identify essential proteins.

BMC bioinformatics·2025
Same author

Comparative analysis of femtosecond, picosecond, and nanosecond laser techniques for transseptal puncture: An in vitro study with pathological correlation.

Journal of photochemistry and photobiology. B, Biology·2025
Same author

The Novel Allele HLA-DPA1*02:01:34 Differs From HLA-DPA1*02:01:01:02 by a Synonymous Mutation.

HLA·2025
Same author

Transforming Growth Factor-β-Activated Protein 1 (TAK1) Regulates Necroptosis in Age-Related Hearing Loss.

Aging cell·2025
Same author

Nrf2 alleviates acute ischemic stroke induced ferroptosis via regulating xCT/GPX4 pathway.

Free radical biology & medicine·2025
Same journal

Highly Articulated Robotic Probe for Minimally Invasive Surgery.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2010
Same journal

Combined peripheral and cortical neural stimulation in motor neurorehabilitation.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

Embedded assessment algorithms within home-based cognitive computer game exercises for elders.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

Digital signal processing of the wideband external pulse recorded during cuff deflation: a new way to measure blood pressure.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

Immune cells detection of the in vivo rejecting heart in USPIO-enhanced magnetic resonance imaging.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2008
Same journal

wHospital: a web-based application with digital signature for drugs dispensing management.

Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference·2007
See all related articles

We developed a novel method to estimate reliable time-varying coherence functions (TVCF) using time-varying transfer functions (TVTF). This approach offers superior time-frequency resolution for analyzing dynamic signal relationships.

Area of Science:

  • Signal processing
  • Biomedical engineering
  • System identification

Background:

  • Estimating time-varying coherence functions (TVCF) is crucial for analyzing dynamic systems.
  • Existing methods, like those based on the short-time Fourier transform, may lack sufficient time-frequency resolution.
  • Time-varying transfer functions (TVTF) offer a promising avenue for dynamic system analysis.

Purpose of the Study:

  • To introduce a novel, reliable method for estimating time-varying coherence functions (TVCF).
  • To leverage the time-varying optimal parameter search algorithm (TVOPS) for TVCF estimation.
  • To demonstrate the improved performance of the proposed TVCF method compared to existing techniques.

Main Methods:

  • The proposed TVCF estimation method utilizes two time-varying transfer functions (TVTFs).

Related Experiment Videos

  • TVTFs are computed using a previously established algorithm, the time-varying optimal parameter search (TVOPS).
  • The TVCF is derived from the multiplication of two TVTFs, with input-output signals swapped for each computation.

    • Main Results:

    • The proposed method successfully estimates reliable time-varying coherence functions.
    • Simulations and real-world data (renal blood flow and pressure) validated the approach's feasibility and efficacy.
    • The new TVCF estimation technique provides enhanced time-frequency resolution compared to short-time Fourier transform methods.

    Conclusions:

    • The novel method provides a reliable and high-resolution approach for estimating time-varying coherence functions.
    • This technique is applicable to various dynamic systems, including physiological signals.
    • The proposed method advances the analysis of time-varying signal relationships.