https://jaehyeon.me/tags/online-machine-learning/Recent content in Online Machine Learning on Jaehyeon KimHugo -- gohugo.ioenCopyright © 2023-2026 Jaehyeon Kim. All Rights Reserved.Tue, 21 Apr 2026 00:00:00 +0000https://jaehyeon.me/blog/2026-04-21-digital-twin-online-machine-learning/Tue, 21 Apr 2026 00:00:00 +0000https://jaehyeon.me/blog/2026-04-21-digital-twin-online-machine-learning/Overview In heavy industrial manufacturing, such as steel hot strip rolling, deterministic physics formulas are the traditional standard for calculating the exact force required to deform a slab of steel. However, these pure physics models share a fatal flaw: they assume a pristine factory state. As physical rollers grind against red-hot steel over hours of production, they experience mechanical wear. As the machinery degrades, the actual physical force required drifts away from the theoretical prediction.