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arXiv 2209.13786cs.LGeess.SP
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时空交通数据恢复的无参数非凸低秩张量完备模型

A Parameter-free Nonconvex Low-rank Tensor Completion Model for Spatiotemporal Traffic Data Recovery

Southeast University(东南大学)

Yang He, Yuheng Jia, Liyang Hu, Chengchuan An, Zhenbo Lu, Jingxin Xia

摘要:

交通数据长期遭受丢失和损坏,导致后续智能交通系统(ITS)应用的准确性和实用性降低。注意到交通数据固有的低秩属性,许多研究将丢失的交通数据恢复描述为低秩张量完成(LRTC)问题。由于LRTC中秩最小化的非凸性和离散性,现有的方法要么用远离秩函数的凸代理函数代替秩,要么用涉及多个参数的非凸代理函数近似秩。在这项研究中,我们提出了一个无参数的非凸张量完成模型(TC-PFNC)的交通数据恢复,其中基于日志的松弛项被设计来近似张量代数秩。此外,以前的研究通常假设观察结果是可靠的,没有任何离群值。因此,我们扩展了TC-PFNC到一个强大的版本(RTC-PFNC)通过建模潜在的流量数据离群值,它可以恢复部分和损坏的观测值的缺失值,并删除观测值中的异常。阐述了基于交替方向乘子法的TC-PFNC和RTC-PFNC的数值解。在四个真实流量数据集上进行的大量实验结果表明,所提出的方法在丢失和损坏的数据恢复方面优于其他最先进的方法。本文中使用的代码可在https://github.com/YoungHe49/T-ITSPFNC上获得。

英文摘要:

Traffic data chronically suffer from missing and corruption, leading to accuracy and utility reduction in subsequent Intelligent Transportation System (ITS) applications. Noticing the inherent low-rank property of traffic data, numerous studies formulated missing traffic data recovery as a low-rank tensor completion (LRTC) problem. Due to the non-convexity and discreteness of the rank minimization in LRTC, existing methods either replaced rank with convex surrogates that are quite far away from the rank function or approximated rank with nonconvex surrogates involving many parameters. In this study, we proposed a Parameter-Free Non-Convex Tensor Completion model (TC-PFNC) for traffic data recovery, in which a log-based relaxation term was designed to approximate tensor algebraic rank. Moreover, previous studies usually assumed the observations are reliable without any outliers. Therefore, we extended the TC-PFNC to a robust version (RTC-PFNC) by modeling potential traffic data outliers, which can recover the missing value from partial and corrupted observations and remove the anomalies in observations. The numerical solutions of TC-PFNC and RTC-PFNC were elaborated based on the alternating direction multiplier method (ADMM). The extensive experimental results conducted on four real-world traffic data sets demonstrated that the proposed methods outperform other state-of-the-art methods in both missing and corrupted data recovery. The code used in this paper is available at: https://github.com/YoungHe49/T-ITSPFNC.

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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