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Open access Sep 2026

Early change in ventilatory ratio during prone positioning and 28-day mortality in patients with ARDS: a retrospective cohort study with exploratory eICU assessment

Prone positioning (PP) improves outcomes in moderate-to-severe acute respiratory distress syndrome (ARDS), but early bedside markers that reliably characterize physiological response remain uncertain. The ventilatory ratio (VR), calculated from minute ventilation, PaCO2, and predicted body weight, may capture ventilato...

Hong Li, Xin Xu, Yu-Dong Peng et al. · 0 citations
Preprint Oct 2026

Improved Approximations for Vehicle Routing with Nonuniform Speeds

We study vehicle routing with vehicles of different speeds on a complete undirected graph whose vertex set consists of a depot and a set of clients, where the distances satisfy the triangle inequality. Each vehicle has a specified speed, and if the total length traveled by a vehicle of speed $s$ is $L$, its completion...

Hong Li · 0 citations

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