NER-AD: Noise-Robust Reconstruction Enhanced by Representation-Learning for Metric Anomaly Detection in Online Service Systems. - Hongyi Liu; Xiaosong Huang; Mengxi Jia; Tong Jia; Zhonghai Wu; Ying Li 012; Yajie Wang; Yu-an Tan 001; Leihuang Zhu; Wanlei Zhou 001 (IEEE Trans. Serv. Comput., 2026)