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There are several signal transforms used in digital signal processing. Due to the non-stationary nature of the ECG signal, a transform that preserves the temporal occurrences of the signal’s frequencies is requisite for meaningful analysis.

Properties of the biorthogonal wavelet transform

Due to the non-stationary nature of the ECG signal, it is imperative to use a transform that preserves the temporal occurrences of the signal’s frequencies. The Fourier Transform, although commonly used in signal analysis, fails to do such, so it was necessary to select a transform with properties more suitable for this application. Properties of interest include orthogonality, wavelet function width, mother wavelet shape, and whether the wavelet function is complex or real valued. In ECG parameter extraction a non-orthogonal analysis involves high redundancy at larger scales. The width of the wavelet function, “directly acts on the analysis resolution that is for wavelet the result of balance between the length of analysis of samples window in time frequency axes. The shape of the mother wavelet is of interest as wavelet filtering can be viewed as an adapted filter looking for the highest correlation between the ECG signal to analyze and the considered wavelet. Lastly, “a complex wavelet providing information about both amplitude and phase is better suitable for oscillatory signal behavior whereas real valued wavelet function only returns a single signal modulus that can be used to isolate signal peaks and discontinuities. Further, “it is desirable that the basis functions (wavelets) be symmetric/antisymmetric. A symmetric basis will enable the detection of peak of wave as an extrema. In the case of antisymmetric basis, the peak of the wave is detected as a zero crossing. Second, minimizing the number of sign changes in the wavelet will facilitate the parameter extraction algorithm. In choosing between the various wavelet families, biorthogonal wavelets are a common choice for ECG signal analysis as they satisfy the above properties.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Elec 301 projects fall 2013. OpenStax CNX. Sep 14, 2014 Download for free at http://legacy.cnx.org/content/col11709/1.1
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