Dmitry Gordeev

@StatsbyLopez @dj_mosfett @NextGenStats @ph_singer We haven't looked at the maps, we rather focused on what variables and network connections make most impact on the accuracy. Judging by that, what matters most is relative location and velocity of each defender vs offensive players and vice versa.

@dj_mosfett @NextGenStats No. Hopefully in offseason. But maybe they remember looking (cc @ph_singer @dott1718)?

Don't running backs matter? A new post that looks at (i) The selection bias involved in which NFL ball carriers receive opportunities (ii) The repeatability of expected yards and other new-ish @NextGenStats metrics statsbylopez.netlify.app/post/don-t-run…

@a_erdem4 @ph_singer Even I used to like qop. 4 years since I played it last time...

@ph_singer Lately. People start swearing since I don't pick a tank for offlane but qop. Then they end up commending me. I guess it is normal in this ranking:)

Interviewer: Are you a team player? Me:

Together with @ph_singer @StackNet_ @Kagglenizer and @srisatish we have published an article on the importance of backtesting the covid-19 forecasting models arxiv.org/abs/2007.11411 and open sourced the code github.com/h2oai/covid19-…

Proud that NFL implemented our (\w @dott1718) #kaggle winning model and that they will use it throughout the 2020 season. I hope the success of this competition can be an inspiration to many others to follow. Details: nfl.com/news/next-gen-… (click also the second tab)

@WalterReade I am so looking forward to Kaggle days getting back on track though. Tokyo trip was great...

I've had 7 trips since Mar. 1 that were cancelled due to the pandemic. At first, I was feeling a bit stir crazy about it. But now I'm thinking significantly less travel is pretty alright.

The Zoo, aka Philipp Singer and Dmitry Gordeev, are two Senior Data Scientists here at @h2oai who are well-known for winning many Kaggle competitions. On May 26th at 11AM CET there will be a live Q&A with them. Sign up below and ask away! bit.ly/2TebiDc

@StatsInTheWild @CaioBrighenti @devinpleuler @ph_singer I think Z was around 256... x3 stands for 3 consecutive convolution layers (with ReLU activation after each).

@StatsInTheWild @CaioBrighenti @devinpleuler @ph_singer You are correct, but the output is Zx10x11 where Z is number of CNN units to be chosen when you build the model. Then you pool across the 11 players, making it Zx10.

@StatsInTheWild @CaioBrighenti @devinpleuler @ph_singer I am not really following a strict notation either :)

@StatsInTheWild @CaioBrighenti @devinpleuler @ph_singer You might have gotten it right.. but hard to be precise with the word "across" :D With tensor of shape 5x10x11 when you run a 2d convolution with kernel of 1 it will act as a transformation of the 5 inputs (channels) applied to each of 10x11 vectors independently.

@StatsInTheWild @CaioBrighenti @devinpleuler @ph_singer We applied both 2d and 1d convolutions. First a 2d which runs through all 10x11 pairs and then, after the first pooling, a 1d through 10 defenders. But in both cases convolutions had kernel sizes of 1, meaning they didn't take any "neighbouring" pairs or players into account.

@CaioBrighenti @devinpleuler @StatsInTheWild @ph_singer The result is then "pooled" by taking average (and max), which are also independent of the order. So we explicitly limited ourselves to these operations, which give the same result regardless of the order.

@CaioBrighenti @devinpleuler @StatsInTheWild @ph_singer Yeah, in a nutshell it's about a convolution with kernel size 1, which a transformation applied to each individual player, so the order of the players in the tensor doesn't matter.

As @ph_singer has joined the team as well, we can announce it as a career move for the whole Zoo ;)

I am happy to announce that I joined the Grandmasters team of H2O.ai! It was an exciting first day for me today, thanks to everyone for such a warm welcome!

@VRaoRao That's the plan for me, hope to say exactly the same thing after a while! The decision to make such a career move was easy for me, but the move itself took years...

@dott1718 I worked in finance for 15 years before moving to tech. The best career move I ever made. Hopefully your experience will be like mine and you’ll wonder why it took you so long to leave. All the best!

I have been working for banks, insurance and consulting for more than 10 years now. Today was my last day employed in finance.. It's time to explore new areas, I hope now it will be as fun as I imagine it.

@mhviraf No, I am not. But will announce my new job tomorrow!

@olgaiv39 @kaggle @ph_singer Teaming up helps. And last week there was more spare time with the quarantine.. But you are right, it takes a lot of efforts

Last night The Zoo finished 2nd in Bengali @kaggle competition! It was tough, but a fun learning experience in computer vision for both me and @ph_singer. Great work from participants and great solutions!