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The class named Transform

Listing 2 presents the beginning of the class named Transform . Listing 2 also presents the beginning of an instance method of that class named doIt . The doIt method computes and returns the complex transform (via output parameters) of an incoming complex series.

Listing 2. The class named Transform.
class Transform{ void doIt(double[]realIn, double[]imagIn, double scale,double[] realOut,double[] imagOut){

The method parameters

The doIt method receives five incoming parameters. The first two parameters are references to two array objects of type double containing the real and imaginary parts of the input series.

The third parameter is a scale factor that is applied to the transform output in an attempt to keep the values in a range suitable for plotting if desired.

The last two parameters are references to array objects of type double . The results of performing the transform are used to populate these two arrays. This is the mechanism by which the object returns thetransform results to the calling program. It is assumed that all of the elements in these two array objects contain values of zero upon entry to the doIt method.

Performing the transform

The body of the doIt method is presented in Listing 3 . The code in Listing 3 iterates on the input arrays, passing each complex sample contained in those two arrays to a method named correctAndRecombine .

Listing 3. Performing the transform.
for(int cnt = 0;cnt<realIn.length;cnt++){ correctAndRecombine(realIn[cnt], imagIn[cnt], cnt,realIn.length, scale,realOut, imagOut);}//end for loop }//end doIt

The transforms of the complex input samples

Each complex value in the incoming arrays represents both a complex sample and the transform of that complex sample under the assumption that the complexsample appears at the origin of the input series.

Correct for actual position and recombine

The method named correctAndRecombine corrects the transform result for each of the complex samples in the series so as to reflect the actualposition of the complex sample in the original input series.

Then the method named correctAndRecombine adds the corrected transform result into a pair of accumulators, one for the real part and one forthe imaginary part. This accomplishes the recombination of the corrected transforms of the input samples in order to produce the transform of the entireoriginal complex input series.

The correctAndRecombine method

The correctAndRecombine method is shown in Listing 4 . Listing 4 also signals the end of the Transform class.

Listing 4. The correctAndRecombine method.
void correctAndRecombine(double realSample, double imagSample,int position, int length,double scale, double[]realOut, double[]imagOut){ //Calculate the complex transform values for// each sample in the complex output series. for(int cnt = 0; cnt<length; cnt++){ double angle =(2.0*Math.PI*cnt/length)*position; //Calculate output based on real inputrealOut[cnt] +=realSample*Math.cos(angle)/scale; imagOut[cnt]+= realSample*Math.sin(angle)/scale;//Calculate output based on imag input realOut[cnt]-= imagSample*Math.sin(angle)/scale;imagOut[cnt] +=imagSample*Math.cos(angle)/scale; }//end for loop}//end correctAndRecombine }//end class transform

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
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Source:  OpenStax, Digital signal processing - dsp. OpenStax CNX. Jan 06, 2016 Download for free at https://legacy.cnx.org/content/col11642/1.38
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