公开(公告)号：US20250146842A1

公开(公告)日：2025-05-08

申请号：US18932877

申请日：2024-10-31

Applicant: NEC Laboratories America, Inc.

Inventor： Yangmin Ding ,  Ting Wang ,  Yue Tian ,  Sarper Ozharar ,  Zhuocheng Jiang ,  Yanchao Wang

IPC: G01D5/353

Abstract: Methods and systems for anomaly detection include measuring time-series data about a system using an optical sensing system. The time-series data is adapted to natural language data. One or more anomaly detection models are selected based on the natural language data and a task. An anomaly is detected in the system using the selected one or more anomaly detection models. A corrective action is performed responsive to the anomaly.

公开(公告)号：US20250146861A1

公开(公告)日：2025-05-08

申请号：US18917504

申请日：2024-10-16

Applicant: NEC Laboratories America, Inc.

Inventor： Zhuocheng Jiang ,  Yue Tian ,  Yangmin Ding ,  Sarper Ozharar ,  Yanchao Wang ,  Ting Wang

IPC: G01H9/00 ,  G01R31/62

Abstract: Systems and methods include collecting vibration data along an optical fiber cable using distributed acoustic sensing (DAS). The collected vibration data is preprocessed to separate the vibration data into at least two mixtures. The at least two mixtures are combined into a mixture of mixtures. The mixture of mixtures is separated into a plurality of estimated source signals using a separation model. The separation model is trained using an unsupervised loss computed between the estimated source signals and the at least two mixtures.