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NOCTA: Non-Greedy Objective Cost-Tradeoff Acquisition for Longitudinal Data
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文章提出一种名为NOCTA的非贪婪目标成本权衡获取方法,在资源受限的预测任务中,通过动态获取最具信息量的特征,同时考虑时间动态和获取成本,在合成和真实世界医疗数据集上表现优于现有方法。

arXiv:2507.12412v1 Announce Type: cross Abstract: In many critical applications, resource constraints limit the amount of information that can be gathered to make predictions. For example, in healthcare, patient data often spans diverse features ranging from lab tests to imaging studies. Each feature may carry different information and must be acquired at a respective cost of time, money, or risk to the patient. Moreover, temporal prediction tasks, where both instance features and labels evolve over time, introduce additional complexity in deciding when or what information is important. In this work, we propose NOCTA, a Non-Greedy Objective Cost-Tradeoff Acquisition method that sequentially acquires the most informative features at inference time while accounting for both temporal dynamics and acquisition cost. We first introduce a cohesive estimation target for our NOCTA setting, and then develop two complementary estimators: 1) a non-parametric method based on nearest neighbors to guide the acquisition (NOCTA-NP), and 2) a parametric method that directly predicts the utility of potential acquisitions (NOCTA-P). Experiments on synthetic and real-world medical datasets demonstrate that both NOCTA variants outperform existing baselines.

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资源限制 动态特征获取 成本权衡 医疗数据 NOCTA方法
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