ODE exam in less than 10 hours.

I still need to get sleep.

I still need another 20 hours of studying, especially since the prof has a hard-on for systems of linear equations and inverse Laplace transformations involving trig identities.....

And the questions involving numerical approximations are probably going to be brutal.

It's times like these that remind me how much I am looking forward to getting that Iron Ring.

flandre

32 Posts

December 15 2009 09:23 GMT

Inverse transformation is not that hard really. I assume you get to use a table?

I have an exam on numerical methods for ODEs and PDEs this friday.

Impervious

Canada4218 Posts

December 15 2009 09:34 GMT

As in, covering the basics I have memorized type table? Yes.

Do I know every trig identity he'll end up pulling on us during this exam - hell no.....

AcrossFiveJulys

United States3612 Posts

December 15 2009 10:40 GMT

it's fine, you'll do well if you study. you gotta skate.

KurtistheTurtle

United States1966 Posts

December 15 2009 10:58 GMT

ode to the odorless

oh odorless odors
why dont you smell
for this awful post
im going to hell

KurtistheTurtle

United States1966 Posts

December 15 2009 11:08 GMT

farewell

Heyoka

Katowice25012 Posts

December 15 2009 11:39 GMT

I don't know what a Laplace transformation is but my engineer roommate hates them so I assume they're not fun

illu

Canada2531 Posts

December 15 2009 12:00 GMT

I hate ODE too.

WhuazGoodJaggah

Lesotho777 Posts

December 15 2009 12:05 GMT

On December 15 2009 20:39 heyoka wrote:
I don't know what a Laplace transformation is but my engineer roommate hates them so I assume they're not fun

actually they are amazing. your roomate maybe never tried to solve it without a laplace transformation.

Cloud

Sexico5880 Posts

December 15 2009 12:56 GMT

#10

No idea what's an ODE. But doing all the exercises in the book on summer pays off

. More than playing sc.

Oh, Ordinary differential equations, you crazy americans and your acronyms. That's my favorite subject

DefMatrixUltra

Canada1992 Posts

December 15 2009 16:18 GMT

#11

ODE are awesome. Their solution space is at least finite. PDE on the other hand...

The only thing I've even really used Laplace/Fourier transform for with DE is to transform PDE to ODE. Explicit numerical approximations are pretty easy to understand (write out the finite difference or whatever order approximation you are using and solve for u), but implicit are more difficult and more time consuming to explain on paper.

I've got to agree that the transforms are definitely awesome. Once you realize it could potentially save you a ton of work, it seems easier. Like Stokes' theorem.

Disclaimer: I'm a physicist, not an engineer.

Impervious

Canada4218 Posts

December 15 2009 18:24 GMT

#12

ODE solutions are a lot nicer than PDE solutions. I've had a bit of experience with PDE's to know.....

Laplace is an awesome way to help solve both ODE's and PDE's. They are usually pretty easy. The rules are about as easy as differentiation rules.

Going the other way - it's just as difficult as integration..... But, it is often better than the alternatives.

The problem is going to be - this prof loves using trig identities in his tests/exams/assignments. Noticing which ones go where is tricky as hell (he's used identities I haven't seen before, and expected us to know them well). I have spent hours memorizing every trig identity I can find on the internet.....

@ flandre - Good luck. I feel your pain.

And I am off. More time would have been a blessing..... Maybe I shouldn't have played those 20 games of SC over the weekend..... Or the second half of both the sunday and monday night football games. Too late now.

TheNearl

Canada48 Posts

December 15 2009 20:46 GMT

#13

Do you have that really old guy who can't hear very well as your prof?

Impervious

Canada4218 Posts

December 16 2009 00:58 GMT

#14

No, I have another one. Which one do you have?

Btw, I commented in the Ottawa LAN thread about starting up a CSL team, if there was interest. Would you be up for that?

Chef

10810 Posts

December 16 2009 01:02 GMT

#15

MMMM systems of linear equations and inverse Laplace transformations involving trig identities YEAAAAHHHHHH... I'm spent.

Impervious

Canada4218 Posts

December 16 2009 01:16 GMT

#16

Yea. I was spent at the question involving the system of linear equations on my exam..... 13% of my final thrown away there.....

But, you being in English - yea..... Confused much?

TheNearl

Canada48 Posts

December 16 2009 17:29 GMT

#17

I had Remi Vaillancourt last year. I wan't very good at it, but I ended up with an A- and only the easy parts of the class still come up for me in third year, so thats pretty alright.

And yeah, CSL could be pretty sweet. I've only got a year and a half left, and I'm still only D- but I'm on my way up!

OpticalShot

Canada6330 Posts

December 16 2009 21:26 GMT

#18

ODE's were one of my highest marks last year despite me hating it like no other. Hmmm.

If you've got 10 hours until exam and you need to study, might as well not sleep. That's what I did for the last 2 exams... regular life cycle does not exist for engineers, period. (I myself a 3rd yr engineer right now)

Impervious

Canada4218 Posts

December 16 2009 22:22 GMT

#19

Umm, I finished the exam more than 24 hours ago..... I know I passed the exam. But I dunno how well I actually did on it. My guess is between a 60% and 70%.

As for a "regular life cycle", I don't have one either. I've been going to sleep at 7 am, and waking up at 2 pm for the last 2 weeks.....

Impervious

Canada4218 Posts

December 16 2009 22:23 GMT

#20

On December 17 2009 02:29 TheNearl wrote:
I had Remi Vaillancourt last year. I wan't very good at it, but I ended up with an A- and only the easy parts of the class still come up for me in third year, so thats pretty alright.

And yeah, CSL could be pretty sweet. I've only got a year and a half left, and I'm still only D- but I'm on my way up!

That doesn't matter. If there's interest, we should definitely start. UOTTAWA REPRESENT!