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michael_nielsen's profile
michael_nielsen
michael_nielsen
michael_nielsen
@michael_nielsen

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michael_nielsen

@michael_nielsen

Searching for the numinous. Co-purveyor of https://quantum.country/ 

San Francisco, CA
michaelnielsen.org
Joined July 2008

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    1. Delip Rao‏ @deliprao 22 Sep 2018
      • Report Tweet

      #DeepLearning folks, remember AMSGrad? Has it worked better than plain Adam for you lately?

      8 replies 7 retweets 34 likes
    2. Denny Britz‏ @dennybritz 23 Sep 2018
      • Report Tweet
      Replying to @deliprao

      Adam has been my default and typically I don’t try anything else. I thought all the other crazy optimizers (not AMSgrad) are just there for people chasing SOTA... do any actually consistently work bettter?

      2 replies 2 retweets 32 likes
    3. Leonid Boytsov‏ @srchvrs 23 Sep 2018
      • Report Tweet
      Replying to @dennybritz @deliprao

      Good question if Adam works consistently better than SGD (or SGD with momentum).

      1 reply 0 retweets 0 likes
    4. Denny Britz‏ @dennybritz 23 Sep 2018
      • Report Tweet
      Replying to @srchvrs @deliprao

      At least I don’t need to tune Adam, but you need to tune SGD + momentum, right?

      1 reply 0 retweets 3 likes
    5. Leonid Boytsov‏ @srchvrs 23 Sep 2018
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      Replying to @dennybritz @deliprao

      Well, as FastAI recently showed, you do. Also, pure SGD seems to work better than people think. Adam seems to be good for experimentation (very fast convergence), but does it generalize as well as SGD? I have some doubts.

      2 replies 0 retweets 9 likes
    6. Delip Rao‏ @deliprao 23 Sep 2018
      • Report Tweet
      Replying to @srchvrs @dennybritz

      Well, nothing generalizes well as a *carefully* tuned SGD.

      2 replies 0 retweets 5 likes
    7. Jeremy Howard‏ @jeremyphoward 23 Sep 2018
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      Replying to @deliprao @srchvrs @dennybritz

      That's not generally true any more

      2 replies 0 retweets 0 likes
    8. Delip Rao‏ @deliprao 23 Sep 2018
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      Replying to @jeremyphoward @srchvrs @dennybritz

      link? SGD has capacity to discover optimal parameters while other variants of SGD we trade off some of that capacity for convenience.

      2 replies 0 retweets 6 likes
    9. Jeremy Howard‏ @jeremyphoward 23 Sep 2018
      • Report Tweet
      Replying to @deliprao @srchvrs @dennybritz

      See the experiments i linked to earlier . Since it isn't a PDF no one seems to bother reading it or citing it, but it's the most complete review I know of http://www.fast.ai/2018/07/02/adam-weight-decay/ …

      6 replies 13 retweets 112 likes
      michael_nielsen‏ @michael_nielsen 25 Sep 2018
      • Report Tweet
      Replying to @jeremyphoward @deliprao and

      People are happy to cite non-pdf. But cueing them helps, egpic.twitter.com/W6yLvJOFvO

      5:22 PM - 25 Sep 2018
      • 15 Likes
      • Thomas Dargent Colin Raffel Andrew Jong Vishal Agarwal deepnarainsingh Alexandr Kalinin rahuldave Dylan Bourgeois
      1 reply 0 retweets 15 likes
        1. New conversation
        1. michael_nielsen‏ @michael_nielsen 25 Sep 2018
          • Report Tweet
          Replying to @michael_nielsen @jeremyphoward and

          And: (Note: DOIs seem to be helpful, but I didn't get one for my book. This means it's not indexed in some places, but mostly doesn't seem to have hurt. http://Distill.pub  gets them for everything, though.)pic.twitter.com/hmPP0kSQkU

          1 reply 0 retweets 1 like
        2. michael_nielsen‏ @michael_nielsen 25 Sep 2018
          • Report Tweet
          Replying to @michael_nielsen @jeremyphoward and

          Also inclined to believe, as Ian says, that if you expect to get credit in accord with standard norms, it helps to participate yourself in those norms, eg:pic.twitter.com/ScfESB2I1b

          3 replies 0 retweets 5 likes
        3. michael_nielsen‏ @michael_nielsen 25 Sep 2018
          • Report Tweet
          Replying to @michael_nielsen @jeremyphoward and

          It's frustrating how opaque academic norms are to outsiders - it's not like there's a manual of this stuff. And I'm sure I violate some ML community norms, as an outsider to that community. But I'd guess those norms are the obstacle here, not some animosity toward pdf or fastai

          1 reply 0 retweets 9 likes
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