Search Results for author: Yancheng Yuan

Found 15 papers, 6 papers with code

Collective Certified Robustness against Graph Injection Attacks

no code implementations3 Mar 2024 Yuni Lai, Bailin Pan, Kaihuang Chen, Yancheng Yuan, Kai Zhou

We investigate certified robustness for GNNs under graph injection attacks.

Revisiting Demonstration Selection Strategies in In-Context Learning

no code implementations22 Jan 2024 Keqin Peng, Liang Ding, Yancheng Yuan, Xuebo Liu, Min Zhang, Yuanxin Ouyang, DaCheng Tao

In this work, we first revisit the factors contributing to this variance from both data and model aspects, and find that the choice of demonstration is both data- and model-dependent.

In-Context Learning

XAI for In-hospital Mortality Prediction via Multimodal ICU Data

1 code implementation29 Dec 2023 Xingqiao Li, Jindong Gu, Zhiyong Wang, Yancheng Yuan, Bo Du, Fengxiang He

To address this issue, this paper proposes an eXplainable Multimodal Mortality Predictor (X-MMP) approaching an efficient, explainable AI solution for predicting in-hospital mortality via multimodal ICU data.

Decision Making Mortality Prediction

LLaRA: Large Language-Recommendation Assistant

1 code implementation5 Dec 2023 Jiayi Liao, Sihang Li, Zhengyi Yang, Jiancan Wu, Yancheng Yuan, Xiang Wang, Xiangnan He

Treating the "sequential behaviors of users" as a distinct modality beyond texts, we employ a projector to align the traditional recommender's ID embeddings with the LLM's input space.

Language Modelling Sequential Recommendation +1

Generate What You Prefer: Reshaping Sequential Recommendation via Guided Diffusion

1 code implementation NeurIPS 2023 Zhengyi Yang, Jiancan Wu, Zhicai Wang, Xiang Wang, Yancheng Yuan, Xiangnan He

Scrutinizing previous studies, we can summarize a common learning-to-classify paradigm -- given a positive item, a recommender model performs negative sampling to add negative items and learns to classify whether the user prefers them or not, based on his/her historical interaction sequence.

Denoising Sequential Recommendation

Large Language Model Can Interpret Latent Space of Sequential Recommender

2 code implementations31 Oct 2023 Zhengyi Yang, Jiancan Wu, Yanchen Luo, Jizhi Zhang, Yancheng Yuan, An Zhang, Xiang Wang, Xiangnan He

Sequential recommendation is to predict the next item of interest for a user, based on her/his interaction history with previous items.

Language Modelling Large Language Model +1

Randomly Projected Convex Clustering Model: Motivation, Realization, and Cluster Recovery Guarantees

no code implementations29 Mar 2023 Ziwen Wang, Yancheng Yuan, Jiaming Ma, Tieyong Zeng, Defeng Sun

In this paper, we propose a randomly projected convex clustering model for clustering a collection of $n$ high dimensional data points in $\mathbb{R}^d$ with $K$ hidden clusters.

Clustering

Invariant Collaborative Filtering to Popularity Distribution Shift

1 code implementation10 Feb 2023 An Zhang, Jingnan Zheng, Xiang Wang, Yancheng Yuan, Tat-Seng Chua

Collaborative Filtering (CF) models, despite their great success, suffer from severe performance drops due to popularity distribution shifts, where these changes are ubiquitous and inevitable in real-world scenarios.

Collaborative Filtering Representation Learning

Understanding Deep Learning via Decision Boundary

no code implementations3 Jun 2022 Shiye Lei, Fengxiang He, Yancheng Yuan, DaCheng Tao

From the theoretical view, two lower bounds based on algorithm DB variability are proposed and do not explicitly depend on the sample size.

Differentiable Invariant Causal Discovery

no code implementations31 May 2022 Yu Wang, An Zhang, Xiang Wang, Yancheng Yuan, Xiangnan He, Tat-Seng Chua

This paper proposes Differentiable Invariant Causal Discovery (DICD), utilizing the multi-environment information based on a differentiable framework to avoid learning spurious edges and wrong causal directions.

Causal Discovery

Decision boundary variability and generalization in neural networks

no code implementations29 Sep 2021 Shiye Lei, Fengxiang He, Yancheng Yuan, DaCheng Tao

Two new notions, algorithm DB variability and $(\epsilon, \eta)$-data DB variability, are proposed to measure the decision boundary variability from the algorithm and data perspectives.

Learning Intents behind Interactions with Knowledge Graph for Recommendation

2 code implementations14 Feb 2021 Xiang Wang, Tinglin Huang, Dingxian Wang, Yancheng Yuan, Zhenguang Liu, Xiangnan He, Tat-Seng Chua

In this study, we explore intents behind a user-item interaction by using auxiliary item knowledge, and propose a new model, Knowledge Graph-based Intent Network (KGIN).

Recommendation Systems Relation

A dual Newton based preconditioned proximal point algorithm for exclusive lasso models

no code implementations1 Feb 2019 Meixia Lin, Defeng Sun, Kim-Chuan Toh, Yancheng Yuan

In addition, we derive the corresponding HS-Jacobian to the proximal mapping and analyze its structure --- which plays an essential role in the efficient computation of the PPA subproblem via applying a semismooth Newton method on its dual.

Convex Clustering: Model, Theoretical Guarantee and Efficient Algorithm

no code implementations4 Oct 2018 Defeng Sun, Kim-Chuan Toh, Yancheng Yuan

The perfect recovery properties of the convex clustering model with uniformly weighted all pairwise-differences regularization have been proved by Zhu et al. (2014) and Panahi et al. (2017).

Clustering

An Efficient Semismooth Newton Based Algorithm for Convex Clustering

no code implementations ICML 2018 Yancheng Yuan, Defeng Sun, Kim-Chuan Toh

Clustering may be the most fundamental problem in unsupervised learning which is still active in machine learning research because its importance in many applications.

Clustering

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