Search Results for author: Wentao Shi

Found 13 papers, 8 papers with code

Uplift Modeling for Target User Attacks on Recommender Systems

1 code implementation5 Mar 2024 Wenjie Wang, Changsheng Wang, Fuli Feng, Wentao Shi, Daizong Ding, Tat-Seng Chua

UBA estimates the treatment effect on each target user and optimizes the allocation of fake user budgets to maximize the attack performance.

Recommendation Systems

Lower-Left Partial AUC: An Effective and Efficient Optimization Metric for Recommendation

no code implementations29 Feb 2024 Wentao Shi, Chenxu Wang, Fuli Feng, Yang Zhang, Wenjie Wang, Junkang Wu, Xiangnan He

Compared to AUC, LLPAUC considers only the partial area under the ROC curve in the Lower-Left corner to push the optimization focus on Top-K. We provide theoretical validation of the correlation between LLPAUC and Top-K ranking metrics and demonstrate its robustness to noisy user feedback.

Recommendation Systems

Enhancing Long-Term Recommendation with Bi-level Learnable Large Language Model Planning

no code implementations29 Feb 2024 Wentao Shi, Xiangnan He, Yang Zhang, Chongming Gao, Xinyue Li, Jizhi Zhang, Qifan Wang, Fuli Feng

To achieve this, we propose a Bi-level Learnable LLM Planner framework, which combines macro-learning and micro-learning through a hierarchical mechanism.

Decision Making Language Modelling +2

Prospect Personalized Recommendation on Large Language Model-based Agent Platform

1 code implementation28 Feb 2024 Jizhi Zhang, Keqin Bao, Wenjie Wang, Yang Zhang, Wentao Shi, Wanhong Xu, Fuli Feng, Tat-Seng Chua

Additionally, we prospect the evolution of Rec4Agentverse and conceptualize it into three stages based on the enhancement of the interaction and information exchange among Agent Items, Agent Recommender, and the user.

Language Modelling Large Language Model +1

BSL: Understanding and Improving Softmax Loss for Recommendation

1 code implementation20 Dec 2023 Junkang Wu, Jiawei Chen, Jiancan Wu, Wentao Shi, Jizhi Zhang, Xiang Wang

Loss functions steer the optimization direction of recommendation models and are critical to model performance, but have received relatively little attention in recent recommendation research.

Fairness

FFHR: Fully and Flexible Hyperbolic Representation for Knowledge Graph Completion

no code implementations7 Feb 2023 Wentao Shi, Junkang Wu, Xuezhi Cao, Jiawei Chen, Wenqiang Lei, Wei Wu, Xiangnan He

Specifically, they suffer from two main limitations: 1) existing Graph Convolutional Network (GCN) methods in hyperbolic space rely on tangent space approximation, which would incur approximation error in representation learning, and 2) due to the lack of inner product operation definition in hyperbolic space, existing methods can only measure the plausibility of facts (links) with hyperbolic distance, which is difficult to capture complex data patterns.

Knowledge Graph Completion Representation Learning

On the Theories Behind Hard Negative Sampling for Recommendation

1 code implementation7 Feb 2023 Wentao Shi, Jiawei Chen, Fuli Feng, Jizhi Zhang, Junkang Wu, Chongming Gao, Xiangnan He

Secondly, we prove that OPAUC has a stronger connection with Top-K evaluation metrics than AUC and verify it with simulation experiments.

Recommendation Systems

UperFormer: A Multi-scale Transformer-based Decoder for Semantic Segmentation

1 code implementation25 Nov 2022 Jing Xu, Wentao Shi, Pan Gao, Zhengwei Wang, Qizhu Li

On the more challenging ADE20K dataset, our best model yields a single-scale mIoU of 50. 18, and a multi-scale mIoU of 51. 8, which is on-par with the current state-of-art model, while we drastically cut the number of FLOPs by 53. 5%.

Object Localization Segmentation +1

SSformer: A Lightweight Transformer for Semantic Segmentation

1 code implementation3 Aug 2022 Wentao Shi, Jing Xu, Pan Gao

It is well believed that Transformer performs better in semantic segmentation compared to convolutional neural networks.

Image Classification Segmentation +1

Adaptive Random Fourier Features Kernel LMS

no code implementations14 Jul 2022 Wei Gao, Jie Chen, Cédric Richard, Wentao Shi, Qunfei Zhang

We propose the adaptive random Fourier features Gaussian kernel LMS (ARFF-GKLMS).

Transient Performance Analysis of the $\ell_1$-RLS

no code implementations14 Sep 2021 Wei Gao, Jie Chen, Cédric Richard, Wentao Shi, Qunfei Zhang

The recursive least-squares algorithm with $\ell_1$-norm regularization ($\ell_1$-RLS) exhibits excellent performance in terms of convergence rate and steady-state error in identification of sparse systems.

DisenKGAT: Knowledge Graph Embedding with Disentangled Graph Attention Network

2 code implementations22 Aug 2021 Junkang Wu, Wentao Shi, Xuezhi Cao, Jiawei Chen, Wenqiang Lei, Fuzheng Zhang, Wei Wu, Xiangnan He

Knowledge graph completion (KGC) has become a focus of attention across deep learning community owing to its excellent contribution to numerous downstream tasks.

Disentanglement Graph Attention +1

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