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

Aslam-u-Alikum, want to write the following in Maple please help

psi[1]:=psi[1,0];

psi[2]:=psi[1,1];

psi[3]:=psi[1,2];

psi[4]:=psi[1,3];

psi[5]:=psi[2,0];

psi[6]:=psi[2,1];

psi[7]:=psi[2,2];

psi[8]:=psi[2,3];

PhD (Scholar)
Department of Mathematics

[x+p*y, x+y, y+z] would like to filter with indets([x+y,y+z])

so that that the list remove polynomials which contain variable p

with(plots)

inequal((2*c-1)/(3*c-1),c=0..1.5,Alpha=0..1)

with(plots)

inequal((2*c-1)/(3*c-1),c=0..1,Alpha=0..1)

Why are the results of the two orders above so different???

A bug in the function of inequal???

i am solving 3 ODE with boundary condition.. with boundary condition

b.mw

Maple Worksheet - Error

Failed to load the worksheet /maplenet/convert/b.mw .

Download b.mw

then i got this error

Error, (in dsolve/numeric/bvp) initial Newton iteration is not converging

i dont know where i need to change.. could you help me..

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

This question is directed at Maplesoft employees. I am not sure if this is the best place to ask this question, but I don't know where else to ask.

I use my desktop machine at home and my tablet at university, so would like to have Maple installed on both machines. Currenly I have Maple installed on the tablet. The tablet is for portability, but at home, Maple is easier to use on the desktop due to the bigger screen and keyboard.

I can't afford to pay for 2 licenses, and I am not sure that many students can. Can Maplesoft change the licensing model to include a second license for $50? I bought Maple 18 for $132, and would be happy to pay $50 for a second license. This way, Maplesoft can make more money, and the student can use Maple in better ways.

Thanks.

EDIT: I also bought the Mathematics Survival Kit, mainly because it featured prominantly in the Maple webstore, and integrates with Maple. Information about the MSK were sparse, and so I was really buying blind, based solely on my good image of Maple. I found the MSK to be terrible, and because of it's association with Maple, tarnished Maple's image for me. 

I recommend Maple to people, but I also warn them about buying add-ons, based on my experience with the MSK, which is truly terrible.

Hi. I need to test if a variable is a dot-product of "anything"-s (usually it is quantum operators).
I try the following

restart; 
with(Physics); 
Physics:-Setup(mathematicalnotation = true); 
Physics:-Setup(anticommutativeprefix = psi); 
ap1 := Physics:-Creation(psi, 1, notation = explicit); 
am1 := Physics:-Annihilation(psi, 1, notation = explicit); 
ap2 := Physics:-Creation(psi, 2, notation = explicit); 
am2 := Physics:-Annihilation(psi, 2, notation = explicit);

z1 := ap1.am1.ap2:
type(z1, ('`.`')(anything));

and get

false

whereas

z2 := a*b*c; 
type(z2, (':-`*`')(anything));

returns

true

I studied ?type,structured and other sources but didn't find any answer.

 the price demand function p(x)=50-x  with $120 fixed cost and $30 variable cost per unit.

is the answerx=$5.67?

I am a Masters of Chemistry student at Leeds University and my project involes producing undirected graphs that look like 2D shapes to represent models of molecules for other student users e.g. if there are 6 atoms it will draw a hexagon shape with each vertices as an atom. It is meant to know what graph to draw by asking them questions in maplet pop-up style windows. To do this I have to ask questions in the pop-up windows like "How many atoms in your molecule?" with a drop down box numbering 2-25 as the possibilities.

The problem I am having is getting Maple to relate the answers to these questions on the maplets to the shape (undirected graph) I want it to draw. It displays the answer in the worksheet as for example; ["12"] but I don't know how to ask maple to recognise this number as meaning anything for making the graph.

Is there anyone who knows about using maplets that could have a chat with me about this?

Thanks! From Megan

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.

Has anyone made use of the GeM module?  found here http://math.usask.ca/~shevyakov/gem/