NIPS*2012 Workshop

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PROBABILISTIC PROGRAMMING:
Foundations and Applications


December 7-8th, 2012
Lake Tahoe, Nevada
NIPS*2012 Conference


Organizers:

  Vikash Mansinghka (MIT)
  Daniel Roy (Cambridge)
  Noah Goodman (Stanford)

Contents


IMPORTANT DATES

  • Submissions due
  . . . . . . . . . . . . .   Oct. 15, 2012
  • Notification of acceptance
  . . . . . . . . . . . . .   Nov. 01, 2012
(Notifications have been sent out. If you have not heard from us, contact us immediately.)
  • NIPS Early Reg. deadline
  . . . . . . . . . . . . .   Nov. 9, 2012
  • Workshop
  . . . . . . . . . . . . .   Dec. 7–8, 2012 (two days)


DAY 1 - FRIDAY DECEMBER 7

7:30am Opening Address by Vikash Mansinghka
7:40am Invited talk: Modeling human common sense with probabilistic programs
Josh Tenenbaum
(MIT)
8:30am Contributed talk: Automated variational inference in probabilistic programming
David Wingate and Theo Weber (Lyric Labs)
9:00am Coffee
9:30am A tour through the theoretical foundations of probabilistic programming
Dan Roy
(Cambridge)
10:00am   Poster Spotlight Presentations
10:30am Non-skiers: Informal Session for Discussion, Posters, Demos
12:00pm Group Lunch
3:30pm BREAKOUT DISCUSSIONS and POSTERS
5:00pm Coffee
5.30pm Invited talk: Probabilistic Programming at Microsoft Research Cambridge: Infer.NET for Real-world Applications
Chris Bishop
(Microsoft Research)
6.20pm Announcements and details for Group Dinner

DAY 2 - SATURDAY DECEMBER 8

7:30am Invited talk: Open-universe probability models: idea, theory, and applications
Stuart Russell
(UC Berkeley)
8:20am Contributed talk: Stan, scalable software for Bayesian modeling
Matt Hoffman (Adobe), Bob Carpenter, and Andrew Gelman (Columbia)
8:40am Contributed talk: A short introduction to probabilistic soft logic
Angelika Kimmig (KU Leuven), Stephen Bach, Matthias Broecheler, Bert Huang, Lise Getoor (U. Maryland)
9:00am Coffee
9:30am What we gain by representing models using code, illustrated in a new, practical Church system
Vikash Mansinghka
(MIT)
10:00am   Poster Spotlight Presentations
10:30am Non-skiers: Informal Session for Discussion, Posters, Demos
12:00pm Group Lunch
3:30pm   DEMO SESSION and POSTERS

Systems being demoed include...

  • Infer.NET (John Bronskill)
  • Venture engine for the Church probabilistic programming language (Vikash Mansinghka)
  • ProbLog (Joris Renkens)

Contact us if you would like us to add your system/name to the list.

5:00pm Coffee
5.30pm The flexible mind: probabilistic programming as a substrate for cognitive modeling
Noah Goodman (Stanford)
6.00pm Contributed talk: A model-learner pattern for Bayesian reasoning
Andy Gordon (Microsoft Research), Mihhail Aizatulin (Open U.), Johannes Borgstroem (Uppsala U.), Guillaume Claret, Thore Graepel, Aditya Nori, Sriram Rajamani, Claudio Russo (Microsoft Research)
6.20pm Contributed talk: Probabilistic computation for information security
Piotr Mardziel
(U. Maryland) and Kasturi Raghavan (UCLA)
6.40pm Closing Remarks by Noah Goodman



MAILING LIST

We encourage you to join the probabilistic-programming mailing list, in order to receive important announcements and participate in related discussions.

OVERVIEW

An intensive, two-day workshop on PROBABILISTIC PROGRAMMING, with contributed and invited talks, poster sessions, demos, and discussions.

Probabilistic models and inference algorithms have become standard tools for interpreting ambiguous, noisy data and building systems that learn from their experience. However, even simple probabilistic models can require significant effort and specialized expertise to develop and use, frequently involving custom mathematics, algorithm design and software development. State-of-the-art models from Bayesian statistics, artificial intelligence and cognitive science --- especially those involving distributions over infinite data structures, relational structures, worlds with unknown numbers of objects, rich causal simulations of physics and psychology, and the reasoning processes of other agents --- can be difficult to even specify formally, let alone in a machine-executable fashion.

PROBABILISTIC PROGRAMMING aims to close this gap, making variations on commonly-used probabilistic models far easier to develop and use, and pointing the way towards entirely new types of models and inference. The central idea is to represent probabilistic models using ideas from programming, including functional, imperative, and logic-based languages. Most probabilistic programming systems represent distributions algorithmically, in terms of a programming language plus primitives for stochastic choice; some even support inference over Turing-universal languages. Compared with representations of models in terms of their graphical-model structure, these representation languages are often significantly more flexible, but still support the development of general-purpose inference algorithms.

The workshop will cover, and welcomes submissions about, all aspects of probabilistic programming. Some questions of particular interest include:

  1. What real-world problems can be solved with probabilistic programming systems today? How much problem-specific customization/optimization is needed? Where is general-purpose inference effective?
  2. What does the probabilistic programming perspective, and in particular the representation of probabilistic models and inference procedures as algorithmic processes, reveal about the computability and complexity of Bayesian inference? When can theory guide the design and use of probabilistic programming systems?
  3. How can we teach people to write probabilistic programs that work well, without having to teach them how to build an inference engine first? What programming styles support tractability of inference?
  4. How can central ideas from software engineering --- including debuggers, validation tools, style checkers, program analyses, reusable libraries, and profilers --- help probabilistic programmers and modelers? Which of these tools can be built for probabilistic programs, or help us build probabilistic programming systems?
  5. What new directions in AI, statistics, and cognitive science would be enabled if we could handle models that took hundreds or thousands of lines of probabilistic code to write?

CONFIRMED KEYNOTE SPEAKERS

ORGANIZERS

Mansinghka.png
Vikash Mansinghka is a Fellow of MIT's Intelligence Initiative and the Computer Science and AI Lab (CSAIL). His research is based on an emerging marriage of the abstractions behind software and hardware with stochastic processes and Bayesian inference. His group develops new probabilistic computing systems as well as applications to machine learning, statistics, cognitive science and AI. His work has yielded new probabilistic programming languages and systems, stochastic digital hardware for real-time Bayesian inference, and practical probabilistic database technology (both academic and commercial) that produces statistically reliable predictions from raw, messy, high-dimensional data tables.

Roy.png
Daniel Roy is a Newton Fellow of the Royal Society at the University of Cambridge. His research interests lie at the intersection of computer science, statistics and probability theory; through the study of probabilistic programming languages, his work aims to develop computational perspectives on fundamental ideas in probability theory and statistics. In particular, he is interested in the use of recursion to define nonparametric distributions on data structures; representation theorems that connect computability and probabilistic structures; and the complexity of inference.

Goodman.png
Noah Goodman is an Assistant Professor of Psychology, Linguistics (by courtesy), and Computer Science (by courtesy) at Stanford University. Goodman studies computational models of cognition, integrating logic and probability. He co-invented the probabilistic programming language Church and continues to develop novel inference techniques and applications. His work in cognitive science spans reasoning with concepts and intuitive theories; natural language semantics and pragmatics; social cognition; and cognitive development, especially the acquisition of abstract knowledge.

The organizer may be contacted via prob-prog-workshop-organizers@mit.edu .

FUNDING

We are grateful to Lyric Labs (part of Analog Devices) for generously offering to help fund the workshop.

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