Unanswered Questions

This page lists MaplePrimes questions that have not yet received an answer

Good day everyone,

please how can one solve this pde in terms of Bessel function or any other analytic solution with the plot.

See the file ID.mw

Thanks.

Hi

Do the following equation solve by method of line(MOL) with this software?

du/dt=0.01 d^2u/dx^2

conditions:

u(x,0)=10

u(0,t)=0

u(1,t)=0

t=1,delta t=0.1,x=1,Nx=10

thank you

hello everyone, I have problem in my project written by matlab to solving my equations with rang-kuta 4 order method. I send my project file.  please help me to run it correctly. thank you.

input Q_j n j V Z F_ve a_1 a_2 p_1 p_2 L A f m k c h t i;

for jj=1:n;

            s=Q_j(jj);

end

b=(-V)*Z;

o=(F_ve*A)*(((a_1^2)*p_1)-((a_2^2)*p_2))/L;

% RK4 method;

% md2z/dt2+cdz/dt+kz=f;

% dz_1/dt=z_2;

% mdz_2/dt+cdz_1/dt+z_1k=f;

% dz_2/dt=1/m(f-cz_2-kz_1);

f=0;

m=1;

k=s+b+o;

c=0;

h=0.5;

t=0:0.5:t;

z1=zeros (1,n);

z2=zeros (1,n);

z1 (1)=0;

z2 (1)=1;

% N=length (t);

f1=@(t,z1,z2)z2;

f2=@(t,z1,z2)f-(c*z2)-(k*z1);

for i=1:n-1;

    k1=f1 (t (i),z1 (i),z2 (i));

    m1=f2 (t (i),z1 (i),z2 (i));

    k2=f1 (t (i)+h/2,z1 (i)+0.5*k1*h,z2 (i)+0.5*m1*h);

    m2=f2 (t (i)+h/2,z1 (i)+0.5*k1*h,z2 (i)+0.5*m1*h);

    k3=f1 (t (i)+h/2,z1 (i)+0.5*k2*h,z2 (i)+0.5*m2*h);

    m3=f2 (t (i)+h/2,z1 (i)+0.5*k2*h,z2 (i)+0.5*m2*h);

    k4=f1 (t (i)+h,z1 (i)*k3*h,z2 (i)*m3*h);

    m4=f2 (t (i)+h,z1 (i)*k3*h,z2 (i)*m3*h);

    z1 (i+1)=z1 (i)+(h/6)*(k1+(2*k2)+(2*k3)+k4);

    z2 (i+1)=z2 (i)+(h/6)*(m1+(2*m2)+(2*m3)+m4);

end

plot (t,z1)

plot (t,z2)

plot (z,t)

 

 

 

 

The following error occurred when I simulate a build-in model, anyone could help me to solve this problem? Thanks first

Hi, as I can't manage to copy and paste on mapleprimes, I would be glad to get a hint ...

Hello,
I am looking here for a tutor, that can help me doing some Maple V (5) programming.
I am a mathematic student and we use Maple programming.
I will be happy to pay a small amount of money for each exercice you help me doing,

if anyone is interested, please contact me here.

(The procedures that we usually have to write are for example:
 Newton-Raphson Method, Chebyshev Polynomial,...  I don't think it is hard for you.
Thank you very time for your time and your help.

guys i got this error permanently for everything , can anyone help me ?

I'm new to mapleprimers and if I make some mistakes I apologize. 

The problem I ran and on which I ask for help is that the command of maple latex I results in latex only the result of an arithmetic expression and the expression does not translate into latex itself. for example, the command latex (3 + 2) I 5 and not as a result from the translation in latex of 3 + 2. I also tried using the command inetrt form but did not succeed, I tried it with the quotes '' and even succeed. I also tried it with double quotes and with simple expressions funzioa eg latex ("(3 + 2) * 5") from me as a result `` (3 + 2) * 5 '' but with more complex expressions: eg. latex("\""(2+1/(5))^(0)+(6/(9)*(((83-8)/(90))-15/(10)+(3/(9))/(2)) -6/(9))/(75/(100)*12/(9))"''") mi da 

Error, Got internal error in Typesetting:-Parse:-Postprocess : "internal error: invalid object ""

Thanking for the help, Best regards

 

Hi all,

How to build an uneven ground by MapleSim?

I want simulation a car runnung on this uneven ground.

Is there any method , proposal , orientation, or any thing can help me

 

Thank you

Hi all,

 

I met a problem while using the MapleSim7.

When I increase the plot points (which can be modeified in the setting tab) to get more accurate solution,

MapleSim does not show the simulation results (ex. graph) even though the simulation has finished.

MapleSim message only says "Done Simulating", but does not show the results.

 

When I set plot points "10000", I could obtain the results. However when I set "30000" for plot points, 

I couldn't get results.

 

What is the problem and how can I obtain the results with many number of plot points?

 

Hello, I would like to customize the context menu in Maple 18 and looking for a way, to convert 2-D expressions to classical maple input using command(s) (same function as "2-D Math > Convert To > 1-D Math Input"). My main problem is, that using the standard procedures in the context menu I get the result of an expression, not the expression itself.

Can you give me an idea, how to do this? Thanks, Csaba

@Carl Love Dear Sir i am trying to solve the system of nonlinear ODE equation with semiinfinite domain by using shooting method . but i am receiving following error 

"Error, (in isolate) cannot isolate for a function when it appears with different arguments"

how can i remove this error. i am unable to find the mistake. kindly help me 

Hi, I build my simulation system in MapleSim, using the module 'Stepper Permanent Magnet' like this

 

But when I run this system, I get the followiing error:

System is underdetermined

 

When I delete the part about 'Stepper Permanent Magnet', the system runs well.

How to solve this problem? How to use 'Stepper Permanent Magnet'?

The Help file of MapleSim cannot proviod such help information.

Thank you.

 

 

 

 

Hi!

 

I was trying to obtain the field equations for the QED Lagrangian and I was not sucessfull.

 

All my calculations are equal to 0.

 

Can someone give a hand?

 

QED.mw

 

Thanks a lot.

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