Hello,

I 'd like to use j as imaginary unit, and I want to display it in the title of a plot using typeset, but it doesn't work (in the expression F):

restart ;interface(imaginaryunit=j);sqrt(-1);
F:=2*sin(w)/w*exp(-j*w*2);F;
plot(abs(eval(F,w=2*Pi*f)),f=0..10,title=typeset('F(j*w)'=F));

Thanks for help in advance.

Hello,

I have problem with Inverse Fourier Transformation. I have an expression S, Maple can't calculate its Inverse Fourier Transform:
 

restart;with(inttrans);

S:=Heaviside(-w)*exp(-(9/640000000*I)*w)/w^2;
invfourier(S,w,t);

 

I have Maple 13.
Thanks for help in advance.

Hello,

I am working on the system model of an impulse radar.  My primer aim is to simulate the received signal. I use signal components and some simple elctrical circuits in the Maplesim model. First version of the system works fine, but I'd like to develop it.

I have the following problems:

- I don't find a way to put a time-delay in the system (in time-domain or in s-domain in the form of' *exp(-s*T)' )

- It seems to me that there is no direct way to add noise to the system (like Gaussian...)

Hello,

I am new to Maplesim and I would like to multiply 2 voltage-time functions ( mixing in time-domain), but I have no succes with the (Mathematical-Operators-) Product component ( I can't connect it to the voltage sources). How can be done this? Thanks for your help in advance.

Hello,

Happy New Year!

My problem:

I don't know why algsubs fails in the following case:

restart;
Xw:=2*Pi^2*(sin(w)*cos(5*w)+sin(4*w))/(w*(Pi-2*w)*(2*w+Pi));
algsubs(w=2*Pi*f,Xw);# problem in the denominator. w is not substituted.
subs(w=2*Pi*f,Xw);# subs works correctly
 

(I have Maple 13)