permanoon123

Mr. Erfan Permanoon

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1 years, 150 days

MaplePrimes Activity


These are replies submitted by permanoon123

@tomleslie 

why uu14000 answer to me this form?
but in uu5000, not this problem
why my code can not compute uu14000?

qu.mw

@tomleslie 

Thanks for help me.

@acer 

I want to append to the same Excel file

@acer 

thanks for attention

I want output of for(do) rule in excel file

@Carl Love 

Can you help me again? please

the code with exponential function work but piecewise function spend very time and don't give me plot!
 

My pc:

processer: core i7, 3.5GHz

RAM:32GB 

NULLrestart

Digits := 10:

with(plots):

with(CurveFitting):

with(plottools):

v := .7:

Disp := 20:

esp := 1000000:

k := 0:

E := proc (x, t) options operator, arrow; int(exp((-esp*w^4+Disp*w^2+k)*t)*cos(w*(x+v*t))/Pi, w = 0. .. infinity) end proc;

proc (x, t) options operator, arrow; int(exp((-esp*w^4+Disp*w^2+k)*t)*cos(w*(x+v*t))/Pi, w = 0. .. infinity) end proc

(1)

f := proc (x) options operator, arrow; piecewise(0 < x and x < 10000, (1/1000)*x, 10000 < x and x < 20000, -(1/1000)*x+20) end proc:

plot(f(x), x = 0 .. 20000)

 

NULL

u := proc (x, t) options operator, arrow; int(E(x-xi, t)*f(xi), xi = 0. .. 20000) end proc;

proc (x, t) options operator, arrow; int(E(x-xi, t)*f(xi), xi = 0. .. 20000) end proc

(2)

u := proc (x, t) options operator, arrow; evalf(Int(E(x-xi, t)*f(xi), xi = 0 .. 20000, method = _NCrule, epsilon = 1/100000)) end proc

proc (x, t) options operator, arrow; evalf(Int(E(x-xi, t)*f(xi), xi = 0 .. 20000, method = _NCrule, epsilon = 1/100000)) end proc

(3)

plot(u(0, t), t = 0 .. 60000, numpoints = 10)

 

 

NULL

 

NULL

NULL

``


 

Download analyze_of_epsilon_with_x^2.mw

@dharr 

I think the problem is with piecewise function because there is no problem when the function hasn't any piecewise

@Carl Love 

could you please help me to fix my code? I try but my code has a bad answer(look my plot) & I really need that


Integral.mw

@acer 

would you help me to plot u(x,t) in x=0 & all time,please

thanks

@Carl Love 

Thanks,would you please send me the cods

@Carl Love 

Thanks

@Carl Love 

I want A1 start at the end(t=20000), this means the time of graph A1 reduction such as t0=20000 and then t1=19000,...

@acer 

how to write Double Integrals in maple with ApproximateInt rule?

@acer 

The method of integration does not matter٫i want numberical integral just.

@Carl Love 

f(y)=y^2,thanks

@acer 

this is my mistake,I corrected. thanks for say

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