arXiv:2603.27062cs.LGstat.ML2026-03被引 3

解决动态系统时序逻辑推断中的分布偏移问题,提升部署时可靠性。

Conformalized Signal Temporal Logic Inference under Covariate Shift

  • 无需模板的可微分方法先学初始模型,再用少量部署数据对齐分布。
  • 通过估计训练与部署数据的似然比,增强模型在分布偏移下的鲁棒性。
  • 适合需高可靠符号学习的自动驾驶、机器人控制等实际场景。

信号时序逻辑(STL)推断旨在从动态系统中学习可解释的时序行为逻辑规则。为确保所学STL公式的正确性,近期方法引入置信预测作为不确定性量化工具。然而,多数现有方法依赖校准与测试数据同分布且可交换的假设,这一假设在真实场景中常被违反。本文提出一种显式应对训练与部署轨迹数据集间协变量偏移的置信化STL推断框架。技术上,首先采用无模板的可微分STL推断方法学习初始模型,随后利用有限的部署侧数据进行微调以促进分布对齐。为在分布偏移下提供有效性保证,框架估计训练与部署分布之间的似然比,并将其融入基于STL鲁棒性的加权置信预测方案。在轨迹数据集上的实验表明,该框架在保持STL公式可解释性的前提下,显著提升了部署阶段符号学习的可靠性。

原文摘要 · Abstract (English)

Signal Temporal Logic (STL) inference learns interpretable logical rules for temporal behaviors in dynamical systems. To ensure the correctness of learned STL formulas, recent approaches have incorporated conformal prediction as a statistical tool for uncertainty quantification. However, most existing methods rely on the assumption that calibration and testing data are identically distributed and exchangeable, an assumption that is frequently violated in real-world settings. This paper proposes a conformalized STL inference framework that explicitly addresses covariate shift between training and deployment trajectories dataset. From a technical standpoint, the approach first employs a template-free, differentiable STL inference method to learn an initial model, and subsequently refines it using a limited deployment side dataset to promote distribution alignment. To provide validity guarantees under distribution shift, the framework estimates the likelihood ratio between training and deployment distributions and integrates it into an STL-robustness-based weighted conformal prediction scheme. Experimental results on trajectory datasets demonstrate that the proposed framework preserves the interpretability of STL formulas while significantly improving symbolic learning reliability at deployment time.

时序逻辑置信预测分布偏移可解释性

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