通过解耦表征学习,实现交通预测中的公平性提升。
FairDRL-ST: Disentangled Representation Learning for Fair Spatio-Temporal Mobility Prediction
- 采用无监督解耦学习分离敏感属性,避免过调
- 在真实城市数据上缩小预测公平差距,性能不降
- 适合关注算法公平性的智慧城市研究者
随着深度时空神经网络在城市计算中的广泛应用,其部署直接影响公共交通、应急服务和交通管理等关键基础设施的使用者。尽管多数时空方法聚焦于提升精度,但近年来公平性问题日益受到关注,因为时空应用中的偏见预测可能不成比例地使某些人口或地理群体处于不利地位,从而加剧既有社会经济不平等,损害公共领域AI的伦理应用。本文提出一种基于解耦表示学习的新框架FairDRL-ST,用于解决时空预测中的公平性问题,尤其聚焦于出行需求预测。通过对抗学习与解耦表示学习相结合,该框架能够分离包含敏感信息的属性。不同于依赖监督学习实现公平性的现有方法(可能导致过度补偿并降低性能),本框架以无监督方式实现公平性,且性能损失最小。我们在真实城市出行数据集上应用该框架,验证了其在缩小公平差距的同时,仍具备与最先进公平感知方法相当的预测性能。
原文摘要 · Abstract (English)
As deep spatio-temporal neural networks are increasingly utilised in urban computing contexts, the deployment of such methods can have a direct impact on users of critical urban infrastructure, such as public transport, emergency services, and traffic management systems. While many spatio-temporal methods focus on improving accuracy, fairness has recently gained attention due to growing evidence that biased predictions in spatio-temporal applications can disproportionately disadvantage certain demographic or geographic groups, thereby reinforcing existing socioeconomic inequalities and undermining the ethical deployment of AI in public services. In this paper, we propose a novel framework, FairDRL-ST, based on disentangled representation learning, to address fairness concerns in spatio-temporal prediction, with a particular focus on mobility demand forecasting. By leveraging adversarial learning and disentangled representation learning, our framework learns to separate attributes that contain sensitive information. Unlike existing methods that enforce fairness through supervised learning, which may lead to overcompensation and degraded performance, our framework achieves fairness in an unsupervised manner with minimal performance loss. We apply our framework to real-world urban mobility datasets and demonstrate its ability to close fairness gaps while delivering competitive predictive performance compared to state-of-the-art fairness-aware methods.
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