Alec Lessing @AlecLessing

Robot trainer (Student Researcher) @StanfordAILab working with @chelseabfinn Also love (Astro)physics, History, Economics, Math. Stanford, CA Joined June 2020

Tweets

16
Followers

36
Following

987
Likes

2K

Annie Chen @_anniechen_

2 months ago

How should an RL agent leverage expert data to improve sample efficiency? Imitation losses can overly constrain an RL policy. In RL via Implicit Imitation Guidance, we show how to use expert data to guide more efficient *exploration*, avoiding pitfalls of imitation-augmented RL

6 39 229 26K 198

Download Image

Annie Chen @_anniechen_

5 months ago

Not all human-collected demos are created equal: ✔️ All are successful ❌ But some strategies are unreliable or brittle This can hurt final performance. Demo-SCORE self-curates reliable training data using online experience. Paper and videos: anniesch.github.io/demo-score/

4 43 102 31K 46

Download Video

Chelsea Finn @chelseabfinn

5 months ago

Data curation is crucial for post-training recipes. But how do we curate? Curation is usually manual & tedious. And, it's hard to tell if a strategy in the data will be reliable! We introduce an automatic way to curate, informed by the robot's policy learning.

Annie Chen @_anniechen_

5 months ago

4 43 102 31K 46

Download Video

2 27 209 19K 87

Download Video

Annie Chen @_anniechen_

2 years ago

Very excited to introduce ROAM, our new work that allows a robot to *adapt on-the-go* as it faces OOD situations during deployment, drawing on pre-trained behaviors. See as ROAM enables our Go1 to roller skate zero-shot 🤖🐕🛼 (without any lessons!) 🧵(1/9)

6 23 141 66K 43

Download Gif

William Keel @NGC3314

4 years ago

Reviewing #ZooGems @NASAHubble data, I was struck once again by the sense of depth in this view. The lower band of stars is the edge-on galaxy UGC 12281 at 110 million light-years, barred spiral is at 1.5 Gly, edge-on spiral still beyond. Galaxies beyond galaxies beyond galaxies.

10 116 566 0 24

Download Image

Katie Melbourne @katiemel25

4 years ago

Only 457 years later

28 455 3K 0 45

Download Image

Mason Porter @masonporter

4 years ago

Henri Poincaré, summarizing how I feel about mathematics: "It is by logic that we prove, but by intuition that we discover." ("C'est par la logique qu'on démontre, c'est par l'intuition qu'on invente.") My heart has always been with the intuition.

11 127 748 0 71

NASA JPL @NASAJPL

4 years ago

We're all spun up! Get up (or stay up) and join the #MarsHelicopter team live in mission control to find out if the first powered flight attempt on another planet was successful. Mission Control Live April 19 at 3:15am PDT (6:15am EDT/1015 GMT) youtu.be/p1KolyCqICI