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ruban ramalingam


Last seen: presque 3 ans il y a |  Actif depuis 2018

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Help: Edge detection technique of image
I have used the following code close all; a = imread('3.bmp'); imshow(a) figure imedge = edge(img, 'sobel',0.05); imshow(i...

environ 5 ans il y a | 1 réponse | 0

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Help: how to count the number of holes on the images and its sizes
I attached a file containing image.. It consists of many black holes.. I want to count the number of black holes and its sizes....

environ 5 ans il y a | 1 réponse | 0

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Help: Problem in using image detection filters
I have a fractography image. I want to determine the edge detection in the fractographs... I want to compare the edge detection ...

plus de 5 ans il y a | 1 réponse | 0

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how to measure the size of black spots(dimples) of various sizes using regionprops?
I have a fractography image. It consists of many black spots.. Black spots are of different shapes and sizes . I want to count t...

plus de 5 ans il y a | 1 réponse | 0

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Help in image processing - how to count the number of black shapes on white image
I have a fractography image. It consists of many black spots.. Black spots are of different shapes. I want to count the number o...

plus de 5 ans il y a | 1 réponse | 0

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Help! How to convert grey scale image to colour contrast image?
I want to count the number of dimples (holes) in the microstructure. I want to change the colour constrast from black and whi...

plus de 5 ans il y a | 1 réponse | 0

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Help: Difficult in optimising these ODE 45 equations
First file function chisquare = myObjective(P) a = P(1); b = P(2); c = P(3); d = P(4); sigma = 180; hstress = 3463.46; H...

plus de 5 ans il y a | 1 réponse | 0

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Help :Difficult to solve linear equations in matlab??
y(1)=302.6:0.0055:332.3; y(2)=305.9:0.0096:355.2; New=(14.58E-4-5.89E-12.*(y(1).^4-8.08E+8)-11.86E-4.*(y(1)-302.8)+18.84E-4.*(...

plus de 5 ans il y a | 1 réponse | 0

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Problems using ODE45 using fmincon command for least square optimisation problem
Sir,, Whether the following codes should be in seperate file?? [t,y] = ode45(@(t,y)pair(t,y,a,b,d,hstress,sigma,Hstar,Kc,c),tsp...

plus de 5 ans il y a | 0

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Problems using ODE45 using fmincon command for least square optimisation problem
Script file function chisquare=myObjective(P) expdata=load('ru.txt'); straindata=expdata(:,2); Timedata=expdata(:,1); a=0....

plus de 5 ans il y a | 2 réponses | 0

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Problem using ODE45 function
function dy=pair(t,y,a,b,d,hstress,sigma,Hstar,kc,c) %function definition dy=zeros(4,1); dy(1)=a*sinh((b*(sigma^d)*(...

plus de 5 ans il y a | 1 réponse | 0

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Help: Finds difficult in solving this coupled ordinary differential equations using ODE45 ??
I have been solving these coupled ordinary differential equations using ODE45 Function file (first file) function dy=pair1(t,y...

plus de 5 ans il y a | 1 réponse | 0

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Question


How to create an offset to the voronoi cells in Voronoi diagram?
A voronoi diagram has been constructed using the following codes from the mathworks documentation: x = gallery('uniformdata',[...

presque 6 ans il y a | 1 réponse | 0

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Question


Help in creating voronoi diagram with offset cells
After creating voronoi cells are generated from the random seed points in a plane.... Each cell is offset to leave a desired amo...

presque 6 ans il y a | 1 réponse | 0

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Question


Help in creating Voronoi diagram- MATLAB
I have tried this code available in matlab documentation.. x = gallery('uniformdata',[1 10],0); y = gallery('uniformdata',[1 1...

presque 6 ans il y a | 1 réponse | 0

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Question


Help in curve fitting tool box
tr=[400 600 1200]; >> Sigma=[250 200 175]; >> cftool Want to fit the following custom equation tr= 1/B*(1+phi)*(sigma^chi) ...

presque 6 ans il y a | 2 réponses | 0

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Finding difficult to solve this coupled ode equations using ode45
I have been solving this two coupled ODE equations using ode45... Please find the attached files.... Even after defining the va...

environ 6 ans il y a | 2 réponses | 0

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Question


how to link ODE45 solver with optimisation toolbox for least squares minimisation toolbox ?
I am solving four coupled ODEs using ODE45 solver with the intention of optimising the parameters with real data using lsqnonlin...

environ 6 ans il y a | 1 réponse | 0

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Question


how-do-i-estimate-or-optimize-the-parameters-of-my-ode-45 system of equations?
I have three constitutive equations containing variables which need to be optimised.. How to give the equality constraints in o...

environ 6 ans il y a | 1 réponse | 0

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Question


How to use the solvers in optimisation tool box for the following equations having equality constraints for least squares minimisation using lsqnonlin command??
How to use the solver in optimisation toolbox..i.e equality constraints and inequality constraints? I have attached the matlab ...

environ 6 ans il y a | 1 réponse | 0

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Question


Finding difficult in solving these coupled seven ODE's.. Initially tried to solve by runge kutta method... I want to solve by through ODE45 solver because solving by rk method requires more lines of execute,
clear; %Runge kutta for four coupled system of equations% %depsi_dt=A/(1-omega)^(b*sigma(1-hc)*sinh[(B*sigma*(1-H))] %dh_dt=(...

environ 6 ans il y a | 1 réponse | 0

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Find difficult in solving these four coupled ODE's using ODE45....I have attached a file regarding these equations..
function dy=pair(t,y,a,b,d,hstress,sigma,Hstar,kc,c) dy(1)= a*sinh((b*(sigma^d)*(1-y(2)))/((1-y(3))*(1-y(4)))) ; dy(2)=((hst...

environ 6 ans il y a | 1 réponse | 0

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Question


Problem while solving the problem ode45
function dy=pair(t,y,a,b,c) dy(1)= -a.*y(1)+b*exp(-t); dy(2)=(-y(1).*y(2).^2)/c; end >> tspan=0:0.1:0.4; >> a=2; >> b=4; ...

environ 6 ans il y a | 1 réponse | 0

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Question


I am trying to solve these coupled equations using ode45...I have attached both the function file and script file...
function yp=rockyruban(t,y) a=0.5179; b=1.1003e-3; c=0.4576; d=1; hstress=3463.46; hstar=0.7846; kc=0.1137; T=503; si...

plus de 6 ans il y a | 2 réponses | 0

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