Search Results for author: Zhijian Xu

Found 7 papers, 2 papers with code

Multi-Patch Prediction: Adapting LLMs for Time Series Representation Learning

no code implementations7 Feb 2024 Yuxuan Bian, Xuan Ju, Jiangtong Li, Zhijian Xu, Dawei Cheng, Qiang Xu

In this study, we present aLLM4TS, an innovative framework that adapts Large Language Models (LLMs) for time-series representation learning.

Contrastive Learning Representation Learning +3

Preliminary Study on Incremental Learning for Large Language Model-based Recommender Systems

no code implementations25 Dec 2023 Tianhao Shi, Yang Zhang, Zhijian Xu, Chong Chen, Fuli Feng, Xiangnan He, Qi Tian

Rather than directly dismissing the role of incremental learning, we ascribe this lack of anticipated performance improvement to the mismatch between the LLM4Recarchitecture and incremental learning: LLM4Rec employs a single adaptation module for learning recommendation, hampering its ability to simultaneously capture long-term and short-term user preferences in the incremental learning context.

Incremental Learning Language Modelling +2

FITS: Modeling Time Series with $10k$ Parameters

1 code implementation6 Jul 2023 Zhijian Xu, Ailing Zeng, Qiang Xu

In this paper, we introduce FITS, a lightweight yet powerful model for time series analysis.

Anomaly Detection Time Series +1

FrAug: Frequency Domain Augmentation for Time Series Forecasting

no code implementations18 Feb 2023 Muxi Chen, Zhijian Xu, Ailing Zeng, Qiang Xu

In time series forecasting (TSF), we need to model the fine-grained temporal relationship within time series segments to generate accurate forecasting results given data in a look-back window.

Anomaly Detection Data Augmentation +3

Rolling Colors: Adversarial Laser Exploits against Traffic Light Recognition

no code implementations6 Apr 2022 Chen Yan, Zhijian Xu, Zhanyuan Yin, Xiaoyu Ji, Wenyuan Xu

By exploiting the rolling shutter of CMOS sensors, we manage to inject a color stripe overlapped on the traffic light in the image, which can cause a red light to be recognized as a green light or vice versa.

Autonomous Driving

DeepFIB: Self-Imputation for Time Series Anomaly Detection

no code implementations12 Dec 2021 Minhao Liu, Zhijian Xu, Qiang Xu

Due to the inherently unpredictable and highly varied nature of anomalies and the lack of anomaly labels in historical data, the AD problem is typically formulated as an unsupervised learning problem.

Anomaly Detection Fraud Detection +4

SCINet: Time Series Modeling and Forecasting with Sample Convolution and Interaction

3 code implementations17 Jun 2021 Minhao Liu, Ailing Zeng, Muxi Chen, Zhijian Xu, Qiuxia Lai, Lingna Ma, Qiang Xu

One unique property of time series is that the temporal relations are largely preserved after downsampling into two sub-sequences.

 Ranked #1 on Time Series Forecasting on ETTh1 (24) Multivariate (using extra training data)

Time Series Traffic Prediction +1

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