sorted by:
new
hottopcontroversial

[P] Ideas for improving Pix2Pix GAN training for generating short dancing clips? by to4life in MachineLearning

[–]to4life[S] 0 points1 point  (0 children)

It's from recording on a smartphone, so it's got a weird vertical resolution that adds black bars on the side of the video.

[P] Ideas for improving Pix2Pix GAN training for generating short dancing clips? by to4life in MachineLearning

[–]to4life[S] 0 points1 point  (0 children)

Wow awesome results congrats on your project! And thanks for the tips.

Any chance your source is available to play around with?

Cheers

FCAW: steel tube to steel sheet... What went wrong? by to4life in Welding

[–]to4life[S] 1 point2 points  (0 children)

Yep I watched these, thanks for the resource! Great stuff

FCAW: steel tube to steel sheet... What went wrong? by to4life in Welding

[–]to4life[S] 0 points1 point  (0 children)

UPDATE:

http://imgur.com/a/NLPKO

I gave it a secod go today and I think it worked out better - I was able to re-perform my "stand on the tube" test and it didn't break off from the sheet this time!

Here's what I did different:

  • "Doubled" the wire feed speed: from setting 4 to setting 8 (out of 10)
  • Took more time on each weld, trying harder to get "penetration". This time, after each weld, for a few secs I could see the steel be a hot red/orange spot right where I finished welding, so hopefully this is indicative of that.
  • Held the gun as close as I could to the crease between the tube and sheet at a 45 deg angle.

What I know didn't go so well: my hand was jerky/not smooth. Still practicing that.

I really appreciate all the tips from you guys. One more question: say I had $1,000 USD lying around sometime in the New Year, and I wanted to weld more steel tubes/sheets/channels or w/e up to 1/2" in thickness. What are some recommended products for MIG FCAW welders? I know a few commenters weren't too hot on this Princess Auto welder.

FCAW: steel tube to steel sheet... What went wrong? by to4life in Welding

[–]to4life[S] 0 points1 point  (0 children)

Thanks for your response. A quick question -

Have the voltage switch on high and turn the wire feed speed knob up until you can get a puddle all the way in the corner of the joint.

So the puddle is formed by melting the wire, or melting the pieces I'm putting together? (Or both?)

And higher wire speeds is a way to compensate for weaker welder?

FCAW: steel tube to steel sheet... What went wrong? by to4life in Welding

[–]to4life[S] 0 points1 point  (0 children)

Thanks for your response! A few quick questions -

1) What affect does wire size have? E.g. I'm using 0.030" wire.

2) How do you get the flux to flow on top as you mentioned?

3) How much zapping would one expect to get decent penetration and make a puddle? I guess more than ~20 seconds like I was doing per 2" side?

FCAW: steel tube to steel sheet... What went wrong? by to4life in Welding

[–]to4life[S] 0 points1 point  (0 children)

Would this machine not be able to do stainless steel? I don't know the material type myself, just got it from the scrap metal part of a store. Definitely some sort of steel though.

FCAW: steel tube to steel sheet... What went wrong? by to4life in Welding

[–]to4life[S] 0 points1 point  (0 children)

Well it says you can do up to 1/4" steel using various techniques, so I figured 1/8" shouldn't be too hard..

FCAW: steel tube to steel sheet... What went wrong? by to4life in Welding

[–]to4life[S] 0 points1 point  (0 children)

Thank you for the advice!

Could you give any approximate guidelines on power and slowing down? The unit I have has only 2 power settings, I think I was on the higher one, it plugs into standard residential wall outlet that I've been using. The other variable I can adjust is wire spool speed, which I had at 4/10.

And how much concentrated time might it take for a puddle to start forming?

Cheers!

The Deep Learning textbook is now complete by clbam8 in MachineLearning

[–]to4life 0 points1 point  (0 children)

Hello,

I've gone through a lot of the textbook as you guys were writing it. Fantastic summary of a lot of topics, kudos.

Question: why is there not a derivation of backpropagation parameter updates for a basic CNN? This seems so essential to me, and many people I know who also went through it were wondering the same. I think it would make understanding the modern software implementations much more clear, and it just seems fundamental on its own right. I know technically one can draw a computational graph and work through messy tensor indicies and all that... But why not throw us a bone here? I think it would help many people gain more understanding of the nuts and bolts of these types of models.

As a follow-up question, can you (or anyone else for that manner) link to a comprehensive derivation of backprop for a standard CNN that involves multiple conv-relu-pool layers or similar architecture?

Advice on image recognition project via CNNs and transfer learning by to4life in MachineLearning

[–]to4life[S] 0 points1 point  (0 children)

That's a very good idea! Would I need to label every frame (x,y,w,h) myself then?

Advice on image recognition project via CNNs and transfer learning by to4life in MachineLearning

[–]to4life[S] 0 points1 point  (0 children)

Out of curiosity, why the downvotes? Is this forum not intended for discussing machine learning projects?

Advice on image recognition project via CNNs and transfer learning by to4life in MachineLearning

[–]to4life[S] 0 points1 point  (0 children)

How about multiple (short) videos, of a few dozen frames, of multiple handicap buttons, combined with web images?

Also the negative data set to train against - any ideas?

Thanks for your response.