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ruban ramalingam


Last seen: ungefär 2 år ago |  Active since 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...

mer än 4 år ago | 0 answers | 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....

mer än 4 år ago | 1 answer | 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 ...

mer än 4 år ago | 0 answers | 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...

mer än 4 år ago | 0 answers | 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...

mer än 4 år ago | 1 answer | 0

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Question


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...

mer än 4 år ago | 1 answer | 0

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Question


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...

mer än 4 år ago | 0 answers | 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.*(...

nästan 5 år ago | 1 answer | 0

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Answered
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...

nästan 5 år ago | 0

Question


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....

nästan 5 år ago | 2 answers | 0

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Question


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)*(...

nästan 5 år ago | 1 answer | 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...

nästan 5 år ago | 1 answer | 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',[...

ungefär 5 år ago | 0 answers | 0

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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...

ungefär 5 år ago | 0 answers | 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...

ungefär 5 år ago | 0 answers | 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) ...

ungefär 5 år ago | 2 answers | 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...

mer än 5 år ago | 2 answers | 0

2

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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...

mer än 5 år ago | 1 answer | 0

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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...

mer än 5 år ago | 1 answer | 0

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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 ...

mer än 5 år ago | 0 answers | 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=(...

mer än 5 år ago | 0 answers | 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...

mer än 5 år ago | 1 answer | 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; ...

mer än 5 år ago | 1 answer | 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...

nästan 6 år ago | 2 answers | 0

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