Search Results for author: Xutao Li

Found 22 papers, 11 papers with code

Four-hour thunderstorm nowcasting using deep diffusion models of satellite

no code implementations16 Apr 2024 Kuai Dai, Xutao Li, Junying Fang, Yunming Ye, Demin Yu, Di Xian, Danyu Qin

In terms of application, our system operates efficiently (forecasting 4 hours of convection in 8 minutes), and is highly transferable with the potential to collaborate with multiple satellites for global convection nowcasting.

Codebook Transfer with Part-of-Speech for Vector-Quantized Image Modeling

no code implementations15 Mar 2024 Baoquan Zhang, Huaibin Wang, Luo Chuyao, Xutao Li, Liang Guotao, Yunming Ye, Xiaochen Qi, Yao He

To this end, we propose a novel codebook transfer framework with part-of-speech, called VQCT, which aims to transfer a well-trained codebook from pretrained language models to VQIM for robust codebook learning.

Image Generation

TinyPredNet: A Lightweight Framework for Satellite Image Sequence Prediction

1 code implementation 2024 2024 Kuai Dai, Xutao Li, Huiwei Lin, Yin Jiang, Xunlai Chen, Yunming Ye, Di Xian

In this article, we propose a lightweight prediction framework TinyPredNet for satellite image sequence prediction, in which a spatial encoder and decoder model the intra-frame appearance features and a temporal translator captures inter-frame motion patterns.

DiffCast: A Unified Framework via Residual Diffusion for Precipitation Nowcasting

1 code implementation11 Dec 2023 Demin Yu, Xutao Li, Yunming Ye, Baoquan Zhang, Chuyao Luo, Kuai Dai, Rui Wang, Xunlai Chen

A unified and flexible framework that can equip any type of spatio-temporal models is proposed based on residual diffusion, which effectively tackles the shortcomings of previous methods.

HPCR: Holistic Proxy-based Contrastive Replay for Online Continual Learning

1 code implementation26 Sep 2023 Huiwei Lin, Shanshan Feng, Baoquan Zhang, Xutao Li, Yew-Soon Ong, Yunming Ye

Inspired by this finding, we propose a novel replay-based method called proxy-based contrastive replay (PCR), which replaces anchor-to-sample pairs with anchor-to-proxy pairs in the contrastive-based loss to alleviate the phenomenon of forgetting.

Continual Learning

UER: A Heuristic Bias Addressing Approach for Online Continual Learning

no code implementations8 Sep 2023 Huiwei Lin, Shanshan Feng, Baoquan Zhang, Hongliang Qiao, Xutao Li, Yunming Ye

By decomposing the dot-product logits into an angle factor and a norm factor, we empirically find that the bias problem mainly occurs in the angle factor, which can be used to learn novel knowledge as cosine logits.

Continual Learning

MetaDiff: Meta-Learning with Conditional Diffusion for Few-Shot Learning

no code implementations31 Jul 2023 Baoquan Zhang, Chuyao Luo, Demin Yu, Huiwei Lin, Xutao Li, Yunming Ye, BoWen Zhang

Its key idea is learning a deep model in a bi-level optimization manner, where the outer-loop process learns a shared gradient descent algorithm (i. e., its hyperparameters), while the inner-loop process leverage it to optimize a task-specific model by using only few labeled data.

Denoising Few-Shot Learning

PCR: Proxy-based Contrastive Replay for Online Class-Incremental Continual Learning

1 code implementation CVPR 2023 Huiwei Lin, Baoquan Zhang, Shanshan Feng, Xutao Li, Yunming Ye

It aims to continuously learn new classes from data stream and the samples of data stream are seen only once, which suffers from the catastrophic forgetting issue, i. e., forgetting historical knowledge of old classes.

Continual Learning

MetaDT: Meta Decision Tree with Class Hierarchy for Interpretable Few-Shot Learning

no code implementations3 Mar 2022 Baoquan Zhang, Hao Jiang, Xutao Li, Shanshan Feng, Yunming Ye, Rui Ye

Then, resorting to the prior, we split each few-shot task to a set of subtasks with different concept levels and then perform class prediction via a model of decision tree.

Few-Shot Learning Representation Learning

SGMNet: Scene Graph Matching Network for Few-Shot Remote Sensing Scene Classification

no code implementations9 Oct 2021 Baoquan Zhang, Shanshan Feng, Xutao Li, Yunming Ye, Rui Ye

In this framework, a scene graph construction module is carefully designed to represent each test remote sensing image or each scene class as a scene graph, where the nodes reflect these co-occurrence objects meanwhile the edges capture the spatial correlations between these co-occurrence objects.

graph construction Graph Matching +3

RAP-Net: Region Attention Predictive Network for Precipitation Nowcasting

1 code implementation3 Oct 2021 Chuyao Luo, ZhengZhang, Rui Ye, Xutao Li, Yunming Ye

Natural disasters caused by heavy rainfall often cost huge loss of life and property.

A multi-domain splitting framework for time-varying graph structure

no code implementations29 Sep 2021 Zehua Yu, Xianwei Zheng, Zhulun Yang, Xutao Li

To address the anomaly detection problem for datasets with a spatial-temporal structure, in this work, we propose a novel graph multi-domain splitting framework, called GMDS, by integrating the time, vertex, and frequency features to locate the anomalies.

Anomaly Detection

Prototype Completion for Few-Shot Learning

1 code implementation11 Aug 2021 Baoquan Zhang, Xutao Li, Yunming Ye, Shanshan Feng

In this paper, 1) we figure out the reason, i. e., in the pre-trained feature space, the base classes already form compact clusters while novel classes spread as groups with large variances, which implies that fine-tuning feature extractor is less meaningful; 2) instead of fine-tuning feature extractor, we focus on estimating more representative prototypes.

Attribute Few-Shot Image Classification +1

MetaNODE: Prototype Optimization as a Neural ODE for Few-Shot Learning

1 code implementation26 Mar 2021 Baoquan Zhang, Xutao Li, Shanshan Feng, Yunming Ye, Rui Ye

Although the existing meta-optimizers can also be adapted to our framework, they all overlook a crucial gradient bias issue, \emph{i. e.}, the mean-based gradient estimation is also biased on sparse data.

Few-Shot Learning

Prototype Completion with Primitive Knowledge for Few-Shot Learning

1 code implementation CVPR 2021 Baoquan Zhang, Xutao Li, Yunming Ye, Zhichao Huang, Lisai Zhang

To avoid the prototype completion error caused by primitive knowledge noises or class differences, we further develop a Gaussian based prototype fusion strategy that combines the mean-based and completed prototypes by exploiting the unlabeled samples.

Attribute Few-Shot Learning

Multi-source Heterogeneous Domain Adaptation with Conditional Weighting Adversarial Network

1 code implementation6 Aug 2020 Yuan Yao, Xutao Li, Yu Zhang, Yunming Ye

In reality, however, it is not uncommon to obtain samples from multiple heterogeneous domains.

Domain Adaptation

MetaConcept: Learn to Abstract via Concept Graph for Weakly-Supervised Few-Shot Learning

no code implementations5 Jul 2020 Baoquan Zhang, Ka-Cheong Leung, Yunming Ye, Xutao Li

To this end, we propose a novel meta-learning framework, called MetaConcept, which learns to abstract concepts via the concept graph.

Few-Shot Learning

Enhancing Cross-target Stance Detection with Transferable Semantic-Emotion Knowledge

no code implementations ACL 2020 Bowen Zhang, Min Yang, Xutao Li, Yunming Ye, Xiaofei Xu, Kuai Dai

Specifically, a semantic-emotion heterogeneous graph is constructed from external semantic and emotion lexicons, which is then fed into a graph convolutional network to learn multi-hop semantic connections between words and emotion tags.

Stance Detection Transfer Learning

Inter-sequence Enhanced Framework for Personalized Sequential Recommendation

no code implementations25 Apr 2020 Feng Liu, Weiwen Liu, Xutao Li, Yunming Ye

Then, based on the inter-sequence correlation encoder, we build GRU network and attention network in the intra-sequence correlation encoder to model the item sequential correlation within each individual sequence and temporal dynamics for predicting users' preferences over candidate items.

Sequential Recommendation

Heterogeneous Domain Adaptation via Soft Transfer Network

no code implementations28 Aug 2019 Yuan Yao, Yu Zhang, Xutao Li, Yunming Ye

Heterogeneous domain adaptation (HDA) aims to facilitate the learning task in a target domain by borrowing knowledge from a heterogeneous source domain.

Domain Adaptation

Deep Reinforcement Learning based Recommendation with Explicit User-Item Interactions Modeling

5 code implementations29 Oct 2018 Feng Liu, Ruiming Tang, Xutao Li, Wei-Nan Zhang, Yunming Ye, Haokun Chen, Huifeng Guo, Yuzhou Zhang

The DRR framework treats recommendation as a sequential decision making procedure and adopts an "Actor-Critic" reinforcement learning scheme to model the interactions between the users and recommender systems, which can consider both the dynamic adaptation and long-term rewards.

Collaborative Filtering Decision Making +4

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