Search Results for author: Oleg Sokolsky

Found 19 papers, 6 papers with code

Testing learning-enabled cyber-physical systems with Large-Language Models: A Formal Approach

no code implementations13 Nov 2023 Xi Zheng, Aloysius K. Mok, Ruzica Piskac, Yong Jae Lee, Bhaskar Krishnamachari, Dakai Zhu, Oleg Sokolsky, Insup Lee

The integration of machine learning (ML) into cyber-physical systems (CPS) offers significant benefits, including enhanced efficiency, predictive capabilities, real-time responsiveness, and the enabling of autonomous operations.

Autonomous Vehicles

Fulfilling Formal Specifications ASAP by Model-free Reinforcement Learning

no code implementations25 Apr 2023 Mengyu Liu, Pengyuan Lu, Xin Chen, Fanxin Kong, Oleg Sokolsky, Insup Lee

We propose a model-free reinforcement learning solution, namely the ASAP-Phi framework, to encourage an agent to fulfill a formal specification ASAP.

reinforcement-learning

Causal Repair of Learning-enabled Cyber-physical Systems

no code implementations6 Apr 2023 Pengyuan Lu, Ivan Ruchkin, Matthew Cleaveland, Oleg Sokolsky, Insup Lee

However, given the high diversity and complexity of LECs, it is challenging to encode domain knowledge (e. g., the CPS dynamics) in a scalable actual causality model that could generate useful repair suggestions.

counterfactual OpenAI Gym

Using Semantic Information for Defining and Detecting OOD Inputs

no code implementations21 Feb 2023 Ramneet Kaur, Xiayan Ji, Souradeep Dutta, Michele Caprio, Yahan Yang, Elena Bernardis, Oleg Sokolsky, Insup Lee

This can render the current OOD detectors impermeable to inputs lying outside the training distribution but with the same semantic information (e. g. training class labels).

Anomaly Detection Out of Distribution (OOD) Detection

Credal Bayesian Deep Learning

no code implementations19 Feb 2023 Michele Caprio, Souradeep Dutta, Kuk Jin Jang, Vivian Lin, Radoslav Ivanov, Oleg Sokolsky, Insup Lee

We show that CBDL is better at quantifying and disentangling different types of uncertainties than single BNNs, ensemble of BNNs, and Bayesian Model Averaging.

Autonomous Driving motion prediction +1

CODiT: Conformal Out-of-Distribution Detection in Time-Series Data

1 code implementation24 Jul 2022 Ramneet Kaur, Kaustubh Sridhar, Sangdon Park, Susmit Jha, Anirban Roy, Oleg Sokolsky, Insup Lee

Machine learning models are prone to making incorrect predictions on inputs that are far from the training distribution.

Anomaly Detection Autonomous Driving +6

Towards Alternative Techniques for Improving Adversarial Robustness: Analysis of Adversarial Training at a Spectrum of Perturbations

1 code implementation13 Jun 2022 Kaustubh Sridhar, Souradeep Dutta, Ramneet Kaur, James Weimer, Oleg Sokolsky, Insup Lee

Algorithm design of AT and its variants are focused on training models at a specified perturbation strength $\epsilon$ and only using the feedback from the performance of that $\epsilon$-robust model to improve the algorithm.

Adversarial Robustness Quantization

PAC-Wrap: Semi-Supervised PAC Anomaly Detection

no code implementations22 May 2022 Shuo Li, Xiayan Ji, Edgar Dobriban, Oleg Sokolsky, Insup Lee

Anomaly detection is essential for preventing hazardous outcomes for safety-critical applications like autonomous driving.

Autonomous Driving Unsupervised Anomaly Detection

Confidence Composition for Monitors of Verification Assumptions

1 code implementation3 Nov 2021 Ivan Ruchkin, Matthew Cleaveland, Radoslav Ivanov, Pengyuan Lu, Taylor Carpenter, Oleg Sokolsky, Insup Lee

To predict safety violations in a verified system, we propose a three-step confidence composition (CoCo) framework for monitoring verification assumptions.

Detecting OODs as datapoints with High Uncertainty

no code implementations13 Aug 2021 Ramneet Kaur, Susmit Jha, Anirban Roy, Sangdon Park, Oleg Sokolsky, Insup Lee

We demonstrate the difference in the detection ability of these techniques and propose an ensemble approach for detection of OODs as datapoints with high uncertainty (epistemic or aleatoric).

Autonomous Driving Management +2

Are all outliers alike? On Understanding the Diversity of Outliers for Detecting OODs

no code implementations23 Mar 2021 Ramneet Kaur, Susmit Jha, Anirban Roy, Oleg Sokolsky, Insup Lee

Deep neural networks (DNNs) are known to produce incorrect predictions with very high confidence on out-of-distribution (OOD) inputs.

Autonomous Driving Management +1

Counterfactual Causality from First Principles?

no code implementations10 Oct 2017 Gregor Gössler, Oleg Sokolsky, Jean-Bernard Stefani

In this position paper we discuss three main shortcomings of existing approaches to counterfactual causality from the computer science perspective, and sketch lines of work to try and overcome these issues: (1) causality definitions should be driven by a set of precisely specified requirements rather than specific examples; (2) causality frameworks should support system dynamics; (3) causality analysis should have a well-understood behavior in presence of abstraction.

counterfactual Position

Proceedings First Workshop on Causal Reasoning for Embedded and safety-critical Systems Technologies

no code implementations26 Aug 2016 Gregor Gössler, Oleg Sokolsky

The keynote by Hana Chockler (King's College) provided a broad perspective on the application of causal reasoning based on Halpern and Pearl's definitions of actual causality to a variety of application domains ranging from formal verification to legal reasoning.

Fault localization Legal Reasoning

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