## Solution of PDE with initial / boundary conditions...

by: Maple
Hello, I have a question concerning PDEs with initial / boundary conditions. Now, I am trying to solve this PDE. The general solution to my PDE is achieved by: governing equation : the homogeneous diffusion equation is > PDE := diff(c(x,t),t)=diff(c(x,t),x,x); the boundary condition are > BC1 := c(0,t)=0; > BC2 := c(0,L)=1; the initial condition is > IC := c(x,t)=1; I want to solve above equation by using maple software(Currently I am using Maple 10). In this case I want to find the final expression. If you have any idea to lead this problem using this software, please help me help.

## Physic problem...

I had the worst physic's teacher in High School so we did not learn a single thing. If you guys could help me I'd appreciate! I need to find the angle if A throws a rock at C. He throws his rock at 20m/s. C is on a 8metres building. A is 10metres away from C. With which angle (theta) A needs to throw his rock to hit C. Situation: http://img522.imageshack.us/my.php?image=problemkk3.jpg Equation: http://img519.imageshack.us/my.php?image=physicequationpa1.jpg

## exporting as HTML / classic interface

by: Maple
Usually exporting from classic interface as HTML works quite well (ok, not all the finer things, but with good (!) graphics and it is painless). Now I want to hide input (for readers not used to Maple that might be better), but with M11.02 the input is exported anyway. Any workaround (except using an editor for the HTML result) ?

## Solving nonlinear ODE (nonlinear spring)...

Hi, I'am trying to solve a nonlinear (spring) ODE like: > ode := A*(diff(x(t), t, t)) + B*(diff(x(t), t)) + R(x(t)) = 1; ...So, I defined a nonlinear (elastic-plastic) resistance function R(x(t)): > xLast := 0; RLast := 0; Rmax := 1; > R := proc (x) > local RR, dx; > global xLast, RLast, Rmax, K; > dx := x-xLast; > RR := RLast+K*dx; > if Rmax <> elif RR <> end if; > xLast := x; RLast := RR; > return RR; > end proc; ...Set up the ODE: > xLast := 0; RLast := 0; > ode := A*(diff(x(t), t, t))+B*(diff(x(t), t))+R(x(t)) = 1;

## Functions of different scales in the same plot...

Is it possible to dislay two functions in different scales in the same diagram? E.g. one function taking values in the range 1..10 and another taking values in the range 0.01..0.1. The reason I want to do this, is to display functions (on different scales) which interact in the same diagram so they can be easily compared. I can, of course blow one function up, but I find that slightly dissatisfying, as the numbers loose their meaning, and understanding the plot becomes more difficult. If this is not possible, is there a way I can effectively export the ploted 'data' and redraw the graphs in another more suitable program? Any tips or help appreciated.

## I'm looking for a MapletBuilder-Guide!!!...

Hi! I'm searching for a useful guide of the MapletBuilder (for Maple 11). I know how to create Boxes 'n' Stuff. Now I want to assign commands to the buttons,which should be executed by pushing them but I don't know how to do that. By that I mean where to put them and what kind of commands exist or do I have to use. I need a guide with some examples. It would be great if anyone could help me. Thanks paience

## Summations involving 0^n...

Dear All, I seem to be having trouble with 0^n in maple, can someone help? Essentially, I have a complex function that simplifies under certain conditions to
f:=1.*0.^n/factorial(n);
but
sum(f,n=0...0);
gives 0. Whereas,
evalf(subs(n=0,f));
gives 1. Any ideas? Thanks Colin

## Maple And The Convergence Of Infinite Series...

Can Maple be used to test infinite series for convergence ? Are the many tests for convergence already built-in Maple ? Thanks, v/r,

## Procedures...

Does anyone know how to write a procedure for simpsons rule using the trapezium rule. I wrote a procedure for the trapezium rule but it wont let me put it in the simpsons rule. Maple keeps saying that local is wrong. Please help!

## piod controller...

i WANT TO DEVELOP A MICROCONTROLLER BASED PID TEMPERATURE CONTROLLER.THE USER WILL SET THE DESIRED TEMPERATURE THROUGH KEYBOARD.I WILL BE USING A TEMPERATURE SENSOR(IC LM35DZ) WHICH WILL BE INPUT TO MICROCONTROLLER 8051 WHICH WILL IMPLEMENT PID ALGORITHM TO CONTROL A RELAY AND HENCE EITHER TURN ON A HEATER OR A COOLER.AN LCD WILL ALSO BE INTERFACED TO DIPLAY THE SET TEMPERATURE AND ACTUAL TEMPERATURE. I DO NOT KNOW THE C CODE FOR THIS.IF ANYONE HAS WORKED ON SUCH KIND OF SYSTEM ,THEN PLEASE SEND ME THE CODE.I WILL BE REALLY VERY GREATFUL

## Does maple has sleep function?...

When I execute a proc of Maple, Can I make the process sleep for several seconds? Just like other programming languages sleep function. Thanks.