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Md Shahidul Alam

Last seen: 4 years ago | Active since 2015

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Question

IIR filter coefficients calculation
I'm trying to design a 'butterworth', 'bandpass' IIR filter using MATLAB. I used _designfilt_ function to design the filter. So ...

6 years ago | 1 answer | 0

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Question

How to solve ODE for varying input using ode23 ?
I'm trying to solve a RC circuit using ode23. For my case the input is varying with time. Here u is my input vector. % func...

7 years ago | 1 answer | 1

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answer

Question

How to write the function of RK4 for 28*28 matrix size
I want to solve a first order ODE using RK4 method. My equation is dT/dt = C\(P(:,i)- G*(T-Tamb)). here C is diagonal capacitanc...

7 years ago | 0 answers | 0

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Question

I have a dynamic system. The equation is ddot = (M)\(F - K*d); Where M,K are (4,4) constant matrix and F and d are vector. I want to solve this equation using ODE45.
In my case The force vector F is variable. The values are changing with time. So to solve ode I've used a for loop. To update th...

8 years ago | 1 answer | 0

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Question

In pdetool for heat transfer, the heat source Q is not a fixed value for me. Suppose I've matrix for Q or a sinusoidal. So how can I set the the value of Q for a variable heat source.
I've a 2d 4 multicorechip. Where each core has different power values and those values are changing with time. These power value...

8 years ago | 1 answer | 0

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Question

In PDE tool What is the difference between Convection heat transfer coefficient(h) and heat transfer coefficient(q)? I know Convection heat transfer coefficient( htc ) but not sure about heat transfer coefficient. Is it the overall htc of the object?
Additionally I've encountered another two problems: 2. In BC parameters, what is weight(h) and temperature(r)? Could you ple...

9 years ago | 1 answer | 0

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Answered
in MATLAB PDE Toolbox App, I've multiple objects (Rectangular shaped) in one file. For multiple objects I'd like to specify the PDE coefficients differently. How can I specify the different PDE coefficients for different objects.
Additionally I've encountered another 3 problem. 1. What is the difference between Convection heat transfer coefficient(h) a...

9 years ago | 0

Question

in MATLAB PDE Toolbox App, I've multiple objects (Rectangular shaped) in one file. For multiple objects I'd like to specify the PDE coefficients differently. How can I specify the different PDE coefficients for different objects.
As an example, I have 3 rectangular shaped objects. They share the boundary with each other. I'd like to calculate the heat tran...

9 years ago | 2 answers | 0

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answers