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#1 Help Me ! » Bode plot problems » 2008-05-10 23:41:07
- pinsky
- Replies: 0
I found this tutorial on the net for drawing Bode diagrams, and a got stuck on the part where a have to convert a transfer function from the form
to
Here is the link how they done it in the example. Why arent they using modules of H
something like
And why the phase angle isnt
Here is the link to the page where this tutorial is.
http://www.swarthmore.edu/NatSci/echeeve1/Ref/LPSA/Bode/BodeHow.html
What am I missing here?
#2 Re: Help Me ! » Line integral problems » 2008-01-08 10:00:39
Why didn't you derivate first when getting dS? [x(t)']^2 [y(t)]^2 [z(t)']^2
#3 Re: Help Me ! » Line integral problems » 2008-01-04 07:57:06
Figured out why
#4 Re: Help Me ! » Line integral problems » 2008-01-04 04:26:56
Given two points (a, b, c) and (x, y, z), we wish to construct a line based upon t. So
C(0) = (a, b, c)
C(1) = (x, y, z)
Correct me if i'm wrong. You wrote points as solutions of the line function C(0) = (a,b,c). In my example i have three points and all i know is that i have to integrate over a triangle which has these points as peaks.
So since Cx(0) = a, we know that n = a. Since Cx(1) = x and Cx(1) = m + n = m + a, we get that m = (x - a). So in full, the equation is:
Cx(t) = (x - a)t + a
How do i get that if i don't know the value of the argument in C(x), why did u use 0 and 1?
Why did you define your limits of integration from 0 to 1?
The professor gave us a different formula for the line integral
Is that the same formula u are using?
Here is the whole task, so i you have the time perhaps you could solve just the part with the parametrization.
Calculate
where k is the border of a triangle with peaks A(3,0,1) B(0,2,1) C(1,0,2).Thx for the latex hint. Cool thing. 
#5 Help Me ! » Line integral problems » 2008-01-03 14:36:34
- pinsky
- Replies: 7
Hy!
So here is my problem.
I have to calculate a line integral from a curve C
integral (x+y-xyz)ds
where C is a border of a triangle whit peaks A(3,0,1) B(0,2,1) C(1,0,2)
My idea is to integrate separately for each line segment AB,BC,CA, but what i don't know is how to write those lines as functions and how to define borders of integration.
Off topic question, is there a free program which has mathematical simbols. I've seen people post formulas as jpg-s on this forum and they look fancy with integral sibols etc...
Tnx
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