# A novel unsupervised framework for time series data anomaly detection via spectrum decomposition

> Research article (Knowledge-Based Systems, 2023) · cited 31× · AI/ML

**Wikidata**: [openalex:W4386799757](https://www.wikidata.org/wiki/openalex:W4386799757)  
**Source**: https://4ort.xyz/entity/a-novel-unsupervised-framework-for-time-series-data-anomaly-detection-via-spectrum-decomposition