Search Results for author: Wolfram Wiesemann

Found 10 papers, 4 papers with code

It's All in the Mix: Wasserstein Machine Learning with Mixed Features

no code implementations19 Dec 2023 Reza Belbasi, Aras Selvi, Wolfram Wiesemann

A key challenge in this context is the presence of estimation errors in the prediction models, which tend to be amplified by the subsequent optimization model -- a phenomenon that is often referred to as the Optimizer's Curse or the Error-Maximization Effect of Optimization.

Decision Making Management

Streamlining Energy Transition Scenarios to Key Policy Decisions

no code implementations11 Nov 2023 Florian Joseph Baader, Stefano Moret, Wolfram Wiesemann, Iain Staffell, André Bardow

Uncertainties surrounding the energy transition often lead modelers to present large sets of scenarios that are challenging for policymakers to interpret and act upon.

Differential Privacy via Distributionally Robust Optimization

1 code implementation25 Apr 2023 Aras Selvi, Huikang Liu, Wolfram Wiesemann

We show that the problem affords a strong dual, and we exploit this duality to develop converging hierarchies of finite-dimensional upper and lower bounding problems.

Robust Phi-Divergence MDPs

no code implementations27 May 2022 Chin Pang Ho, Marek Petrik, Wolfram Wiesemann

In recent years, robust Markov decision processes (MDPs) have emerged as a prominent modeling framework for dynamic decision problems affected by uncertainty.

Partial Policy Iteration for L1-Robust Markov Decision Processes

1 code implementation16 Jun 2020 Chin Pang Ho, Marek Petrik, Wolfram Wiesemann

Robust Markov decision processes (MDPs) allow to compute reliable solutions for dynamic decision problems whose evolution is modeled by rewards and partially-known transition probabilities.

On Linear Optimization over Wasserstein Balls

no code implementations15 Apr 2020 Man-Chung Yue, Daniel Kuhn, Wolfram Wiesemann

In this technical note we prove that the Wasserstein ball is weakly compact under mild conditions, and we offer necessary and sufficient conditions for the existence of optimal solutions.

Calculating Optimistic Likelihoods Using (Geodesically) Convex Optimization

1 code implementation NeurIPS 2019 Viet Anh Nguyen, Soroosh Shafieezadeh-Abadeh, Man-Chung Yue, Daniel Kuhn, Wolfram Wiesemann

A fundamental problem arising in many areas of machine learning is the evaluation of the likelihood of a given observation under different nominal distributions.

Fast Bellman Updates for Robust MDPs

no code implementations ICML 2018 Chin Pang Ho, Marek Petrik, Wolfram Wiesemann

The first algorithm uses a homotopy continuation method to compute updates for L1-constrained s, a-rectangular ambiguity sets.

Size Matters: Cardinality-Constrained Clustering and Outlier Detection via Conic Optimization

no code implementations22 May 2017 Napat Rujeerapaiboon, Kilian Schindler, Daniel Kuhn, Wolfram Wiesemann

Plain vanilla K-means clustering has proven to be successful in practice, yet it suffers from outlier sensitivity and may produce highly unbalanced clusters.

Constrained Clustering Outlier Detection

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