So I'm having trouble using maple to find the relationship (formula) between two sets of data

I have time and current as t1, t2, t3...so on, and current.

Is there anyway to use maple to find it?

st6.mw,st7.mwI want to obtain the analytical solution for this PDE by maple       . But I can not do it. Please help me

((d^2)T/dx^2)+ ((d^2)T/dy^2)+ ((d^2)T/dz^2)=-A*Q(x,y,z)

Where   0 <x<a ,  0 <y<b  ,  0 <z<l

With the boundary conditions:

(dT(0,y,z)/dx)=n-T(0,y,z)    (dT(a,y,z)/dx)=n-T(a,y,z)   (dT(x,0,z)/dy)=n-T(x,0,z)

(dT(x,b,z)/dy)=n-T(x,b,z)     (dT(x,y,0)/dz)=n-T(x,y,0)    (dT(x,y,l)/dz)=n-T(x,y,l)

where n is constant and A is set of parameters.

I am attempting to have Maple pull out the Eurocup qualifying scores from here http://www.uefa.com/uefaeuro/qualifiers/season=2016/matches/all/index.html

It doesn't seem to grab the full page.  Doing a search on Portugal only finds the one match against Albania.  Similarily a search on England only finds the match against Switzerland.  It seems to only find one instance and I'm not sure why it doesn't Get the full page. 

Any ideas?

I'm using the command

HTTP[Get]("http://www.uefa.com/uefaeuro/qualifiers/season=2016/matches/all/index.html")

Hey, how is can i see all the steps in maple? I would specially like to know it for differential equations.

For example we could use this one:

dl := 3*(diff(y(t), t, t))+6*(diff(y(t), t))+4*y(t) = 0 

I'd like to implement this in Maple, but being a newbie having hard time getting the syntax right:

This is what I tried:

a:='a';
f:= i->product( `if`(evalb(i<>j),(a-z(j))/(z(i)-z(j)),NULL),j=1..3);

but it is not skipping the i=j case, since when I call it with f(1) I get division by zero.

f(1);
Error, (in product) numeric exception: division by zero

Tried also

f:= i->product(`if`(evalb(not(i=j)),(a-z(j))/(z(i)-z(j)),NULL),j=1..3);
and few other things. I think the reason it fails is deeper than my level of Maple undertstanding.

How would you do this in Maple?

I came across this website www.fuelsonline.ca that has their price for furnace oil and Propane.  I thought it would be fairly easy using HTTP[Get] to fish out the prices, but it turns out those values on the page are images in of course a format (PNG) that cannot be read by Maple.  I don't know where that web page is pulling the prices from but it looks like web surgery with Maple will be unable to (at least not easily) wean the numbers out. 

If anyone has any ideas I would be interested in knowing.

Hi,

I have two all 1.-1  square matrices and want to test whether they are equivalent or not. Can anyone help me with details?Thanks in advance

Hello everybody

I am working on the bending of FGM plate, and I just used maple for the calculation functions of my problem of the bending of FGM plates.

Can any from the members of mapleprimes one help me to write Navier's equation include below for the bending of the plate because I am new in using Maple 18

alfa=m*pi/a, beta=n*pi/b with m=1,3,5..100 and n=1,3,5...100

Thank's for all 

Hi gang!
Upon upgrading to a stable mac OSX Yosemite, I've been experiencing a noticeably slower Maple 18. The Maple machine itself is quick during calculus operations, though the interface bugs me after the upgrade.

It seems as if the program constantly has to load any open palettes. So for an example, if I run with the 'expression' and 'calculus'-palettes open - which I do constantly - it seems as if Maple has to load every single icon, piece by piece. This loading occurs randomly, but often it happens several times every minute. The loading causes a 3-4 sec lag, which is incredibly annoying. Closing the paletts does not affect this random loading. I run with the recent Java-upgrade specifically for Yosemite.

Before upgrading, I ran Maple 18 on 10.9 Mavericks and everything worked ran like a dream. The program was incredebly fast and responsive. Furthermore, I run Maple on a late 2014 fully specced MBP, so hardware shouldn't be an issue either.

My Maple is installed with an authorized academic license.

Anyone able to give some inputs to what might seem to cause the issue here?

Thanks a bunch! :-)

Best regards,

Claus Iversen

Denmark

Dear Friends,

My present problem is to calculate the coefficients  

of ODES based on the experiment data. In order to simulate the actual experiment, a set of  is given with . Then the experiment data (yexp) can be calculated. Finally, the least-squares method (lsq) is used to calculate the coefficient values. Now the NLPSolve function can be used. However, the globalsolve can’t run.

If it is convenient for you, wish you can solve it.

Code:

restart;
cdm_ode := diff(y1(t), t) = c0*(y6(t)*(1-y3(t))/(s0*(1-y4(t)*(1-y5(t)))))^n/(1-y2(t)), diff(y2(t), t) = ks*y2(t)^(1/3)*(1-y2(t)), diff(y3(t), t) = h1*(1-y3(t)/h2)*c0*(y6(t)*(1-y3(t))/(s0*(1-y4(t)*(1-y5(t)))))^n/(sigma*(1-y2(t))), diff(y4(t), t) = (1/3)*kp*(1-y4(t))^4, diff(y5(t), t) = A*B*y1(t)^(B-1)*c0*(y6(t)*(1-y3(t))/(s0*(1-y4(t)*(1-y5(t)))))^n/(1-y2(t)), diff(y6(t), t) = y6(t)*c0*(y6(t)*(1-y3(t))/(s0*(1-y4(t)*(1-y5(t)))))^n/(1-y2(t));

tol_t := 3600;
sol := dsolve([cdm_ode, y1(0) = 0, y2(0) = 0, y3(0) = 0, y4(0) = 0, y5(0) = 0, y6(0) = 175], numeric, range = 0 .. tol_t, output = listprocedure, parameters = [c0, n, sigma, s0, ks, h1, h2, kp, A, B]);

sol(parameters = [5.7*10^(-6), 10.186, 175, 200, 5*10^(-8), 10000, .269, 1.5*10^(-7), 1.5, 2]);

t := [seq(i^2, i = 0 .. 50, 1)];

y1data := subs(sol, y1(t));
 
y1exp := [seq(y1data(t[i]), i = 1 .. 51)];

err := proc (c0, n, s0, ks, h1, h2, kp, A, B) local y1cal, y1val, lsq; sol(parameters = [c0, n, 175, s0, ks, h1, h2, kp, A, B]); y1cal := subs(sol, y1(t)); y1val := [seq(y1cal(t[i]), i = 1 .. 51)]; lsq := add((y1val[i]-y1exp[i])^2, i = 1 .. 51); lsq end proc;

with(Optimization);
val := NLPSolve(err, 10^(-8) .. 10^(-4), 2 .. 20, 150 .. 250, 10^(-2) .. 1, 100 .. 20000, 10^(-5) .. .4, 10^(-5) .. 1, .5 .. 2, 1 .. 10);
GlobalSolve(err, 10^(-10) .. 10^(-4), 2 .. 20, 150 .. 250, 0 .. 1, 100 .. 15000, 0 .. .5, 0 .. 1, .5 .. 2, 1 .. 5);

Error, (in GlobalOptimization:-GlobalSolve) `InertForms` does not evaluate to a module

Download dehoog.mw

How is it possible to numerically integrate the function containing Diract delta function.

The following code for example is failed to answer and makes computer memory full.