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arXiv 2602.11947math.OCstat.ML
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混合整数规划用于断点检测

Change-Point Detection via Piecewise Linear Fitting Using MIP

H. Milton Stewart School of Industrial and Systems Engineering (ISyE)(H. 米尔顿·斯图尔特工业与系统工程学系);Georgia Institute of Technology(佐治亚理工学院)

Apoorva Narula, Santanu S. Dey, Yao Xie

AI总结:

本文提出了一种基于混合整数规划的离线多断点检测方法,通过加强的MIP公式实现更紧的松弛,并扩展到多维和稀疏断点检测场景。

摘要:

我们提出了一种新的混合整数规划(MIP)方法,用于离线多断点检测,通过将问题转化为全局最优分段线性(PWL)拟合问题。我们的主要贡献是一个加强的MIP公式族,其线性规划(LP)松弛允许在段分配变量上获得整数投影,这些变量编码了每个数据点的段成员资格。这一性质导致了比现有方法更紧的松弛。我们进一步将该框架扩展到两个研究热点设置:(i)具有共享断点的多维PWL模型,以及(ii)稀疏断点检测,其中只有部分维度经历结构变化。在基准真实世界数据集上的广泛计算实验表明,所提出的方法在ℓ₁和ℓ₂损失函数下相比现有最先进方法在求解时间上实现了减少。

英文摘要:

We present a new mixed-integer programming (MIP) approach for offline multiple change-point detection by casting the problem as a globally optimal piecewise linear (PWL) fitting problem. Our main contribution is a family of strengthened MIP formulations whose linear programming (LP) relaxations admit integral projections onto the segment-assignment variables, which encode the segment membership of each data point. This property yields provably tighter relaxations than existing formulations for offline multiple change-point detection. We further extend the framework to multi-dimensional PWL models with shared change-points. Extensive computational experiments on benchmark real-world datasets demonstrate that the proposed formulations achieve reductions in solution times in comparison to the state-of-the-art.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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