Correlation-based dynamic sampling for online high dimensional process monitoring
- Journal of Quality Technology
- July 2021
- Volume 53 Issue 3
- pp. 289-308
- Nabhan, Mohammad, Mei, Yajun, Shi, Jianjun
Effective process monitoring of high-dimensional data streams with embedded spatial structures has been an arising challenge for environments with limited resources. Utilizing the spatial structure is key to improve monitoring performance. This article proposes a correlation-based dynamic sampling technique for change detection. Our method borrows the idea of Upper Confidence Bound algorithm and uses the correlation structure not only to calculate a global statistic, but also to infer unobserved sensors from partial observations. Simulation studies and two case studies on solar flare detection and carbon nanotubes (CNTs) buckypaper process monitoring are used to validate the effectiveness of our method.