Search Results for author: Jia-Jie Zhu

Found 17 papers, 8 papers with code

Analysis of Kernel Mirror Prox for Measure Optimization

no code implementations29 Feb 2024 Pavel Dvurechensky, Jia-Jie Zhu

By choosing a suitable function space as the dual to the non-negative measure cone, we study in a unified framework a class of functional saddle-point optimization problems, which we term the Mixed Functional Nash Equilibrium (MFNE), that underlies several existing machine learning algorithms, such as implicit generative models, distributionally robust optimization (DRO), and Wasserstein barycenters.

An Inexact Halpern Iteration with Application to Distributionally Robust Optimization

no code implementations8 Feb 2024 Ling Liang, Kim-Chuan Toh, Jia-Jie Zhu

The Halpern iteration for solving monotone inclusion problems has gained increasing interests in recent years due to its simple form and appealing convergence properties.

Estimation Beyond Data Reweighting: Kernel Method of Moments

1 code implementation18 May 2023 Heiner Kremer, Yassine Nemmour, Bernhard Schölkopf, Jia-Jie Zhu

We provide a variant of our estimator for conditional moment restrictions and show that it is asymptotically first-order optimal for such problems.

Causal Inference

Propagating Kernel Ambiguity Sets in Nonlinear Data-driven Dynamics Models

no code implementations27 Apr 2023 Jia-Jie Zhu

This paper provides answers to an open problem: given a nonlinear data-driven dynamical system model, e. g., kernel conditional mean embedding (CME) and Koopman operator, how can one propagate the ambiguity sets forward for multiple steps?

Functional Generalized Empirical Likelihood Estimation for Conditional Moment Restrictions

1 code implementation11 Jul 2022 Heiner Kremer, Jia-Jie Zhu, Krikamol Muandet, Bernhard Schölkopf

Important problems in causal inference, economics, and, more generally, robust machine learning can be expressed as conditional moment restrictions, but estimation becomes challenging as it requires solving a continuum of unconditional moment restrictions.

BIG-bench Machine Learning Causal Inference

Shallow Representation is Deep: Learning Uncertainty-aware and Worst-case Random Feature Dynamics

no code implementations24 Jun 2021 Diego Agudelo-España, Yassine Nemmour, Bernhard Schölkopf, Jia-Jie Zhu

Random features is a powerful universal function approximator that inherits the theoretical rigor of kernel methods and can scale up to modern learning tasks.

Distributionally Robust Trajectory Optimization Under Uncertain Dynamics via Relative Entropy Trust-Regions

no code implementations29 Mar 2021 Hany Abdulsamad, Tim Dorau, Boris Belousov, Jia-Jie Zhu, Jan Peters

Trajectory optimization and model predictive control are essential techniques underpinning advanced robotic applications, ranging from autonomous driving to full-body humanoid control.

Autonomous Driving Humanoid Control +1

Adversarially Robust Kernel Smoothing

1 code implementation16 Feb 2021 Jia-Jie Zhu, Christina Kouridi, Yassine Nemmour, Bernhard Schölkopf

We propose a scalable robust learning algorithm combining kernel smoothing and robust optimization.

BIG-bench Machine Learning

Kernel Distributionally Robust Optimization

2 code implementations12 Jun 2020 Jia-Jie Zhu, Wittawat Jitkrittum, Moritz Diehl, Bernhard Schölkopf

We prove a theorem that generalizes the classical duality in the mathematical problem of moments.

Stochastic Optimization

Worst-Case Risk Quantification under Distributional Ambiguity using Kernel Mean Embedding in Moment Problem

no code implementations31 Mar 2020 Jia-Jie Zhu, Wittawat Jitkrittum, Moritz Diehl, Bernhard Schölkopf

In order to anticipate rare and impactful events, we propose to quantify the worst-case risk under distributional ambiguity using a recent development in kernel methods -- the kernel mean embedding.

Fast Non-Parametric Learning to Accelerate Mixed-Integer Programming for Online Hybrid Model Predictive Control

no code implementations20 Nov 2019 Jia-Jie Zhu, Georg Martius

Today's fast linear algebra and numerical optimization tools have pushed the frontier of model predictive control (MPC) forward, to the efficient control of highly nonlinear and hybrid systems.

Model Predictive Control

Control What You Can: Intrinsically Motivated Task-Planning Agent

1 code implementation NeurIPS 2019 Sebastian Blaes, Marin Vlastelica Pogančić, Jia-Jie Zhu, Georg Martius

We present a novel intrinsically motivated agent that learns how to control the environment in the fastest possible manner by optimizing learning progress.

Deep Reinforcement Learning for Event-Triggered Control

1 code implementation13 Sep 2018 Dominik Baumann, Jia-Jie Zhu, Georg Martius, Sebastian Trimpe

Event-triggered control (ETC) methods can achieve high-performance control with a significantly lower number of samples compared to usual, time-triggered methods.

reinforcement-learning Reinforcement Learning (RL)

Generative Adversarial Active Learning

no code implementations25 Feb 2017 Jia-Jie Zhu, José Bento

We propose a new active learning by query synthesis approach using Generative Adversarial Networks (GAN).

Active Learning

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