Search Results for author: Xiaolei Wang

Found 18 papers, 15 papers with code

Bayesian Analyses of Structural Vector Autoregressions with Sign, Zero, and Narrative Restrictions Using the R Package bsvarSIGNs

1 code implementation28 Jan 2025 Xiaolei Wang, Tomasz Woźniak

The R package bsvarSIGNs implements state-of-the-art algorithms for the Bayesian analysis of Structural Vector Autoregressions identified by sign, zero, and narrative restrictions.

CNC: Cross-modal Normality Constraint for Unsupervised Multi-class Anomaly Detection

no code implementations31 Dec 2024 Xiaolei Wang, Xiaoyang Wang, Huihui Bai, Eng Gee Lim, Jimin Xiao

Existing unsupervised distillation-based methods rely on the differences between encoded and decoded features to locate abnormal regions in test images.

Attribute Decoder +2

Investigating the Pre-Training Dynamics of In-Context Learning: Task Recognition vs. Task Learning

1 code implementation20 Jun 2024 Xiaolei Wang, Xinyu Tang, Wayne Xin Zhao, Ji-Rong Wen

The emergence of in-context learning (ICL) is potentially attributed to two major abilities: task recognition (TR) for recognizing the task from demonstrations and utilizing pre-trained priors, and task learning (TL) for learning from demonstrations.

Ensemble Learning In-Context Learning

A prediction-based forward-looking vehicle dispatching strategy for dynamic ride-pooling

no code implementations11 Mar 2024 Xiaolei Wang, Chen Yang, Yuzhen Feng, Luohan Hu, Zhengbing He

For on-demand dynamic ride-pooling services, e. g., Uber Pool and Didi Pinche, a well-designed vehicle dispatching strategy is crucial for platform profitability and passenger experience.

Unleashing the Potential of Large Language Models as Prompt Optimizers: Analogical Analysis with Gradient-based Model Optimizers

1 code implementation27 Feb 2024 Xinyu Tang, Xiaolei Wang, Wayne Xin Zhao, Siyuan Lu, Yaliang Li, Ji-Rong Wen

By systematically analyzing a rich set of improvement strategies on the two aspects, we further develop a capable Gradient-inspired LLM-based Prompt Optimizer called GPO.

MMLU

Language-Specific Neurons: The Key to Multilingual Capabilities in Large Language Models

1 code implementation26 Feb 2024 Tianyi Tang, Wenyang Luo, Haoyang Huang, Dongdong Zhang, Xiaolei Wang, Xin Zhao, Furu Wei, Ji-Rong Wen

Large language models (LLMs) demonstrate remarkable multilingual capabilities without being pre-trained on specially curated multilingual parallel corpora.

Are Large Language Models Good Prompt Optimizers?

1 code implementation3 Feb 2024 Ruotian Ma, Xiaolei Wang, Xin Zhou, Jian Li, Nan Du, Tao Gui, Qi Zhang, Xuanjing Huang

Despite the success, the underlying mechanism of this approach remains unexplored, and the true effectiveness of LLMs as Prompt Optimizers requires further validation.

valid

Alleviating the Long-Tail Problem in Conversational Recommender Systems

1 code implementation21 Jul 2023 Zhipeng Zhao, Kun Zhou, Xiaolei Wang, Wayne Xin Zhao, Fan Pan, Zhao Cao, Ji-Rong Wen

Conversational recommender systems (CRS) aim to provide the recommendation service via natural language conversations.

Diversity Recommendation Systems +1

Improving Conversational Recommendation Systems via Counterfactual Data Simulation

1 code implementation5 Jun 2023 Xiaolei Wang, Kun Zhou, Xinyu Tang, Wayne Xin Zhao, Fan Pan, Zhao Cao, Ji-Rong Wen

To develop our approach, we characterize user preference and organize the conversation flow by the entities involved in the dialogue, and design a multi-stage recommendation dialogue simulator based on a conversation flow language model.

Conversational Recommendation counterfactual +4

Rethinking the Evaluation for Conversational Recommendation in the Era of Large Language Models

1 code implementation22 May 2023 Xiaolei Wang, Xinyu Tang, Wayne Xin Zhao, Jingyuan Wang, Ji-Rong Wen

The recent success of large language models (LLMs) has shown great potential to develop more powerful conversational recommender systems (CRSs), which rely on natural language conversations to satisfy user needs.

Conversational Recommendation Explanation Generation +1

Towards Unified Conversational Recommender Systems via Knowledge-Enhanced Prompt Learning

1 code implementation19 Jun 2022 Xiaolei Wang, Kun Zhou, Ji-Rong Wen, Wayne Xin Zhao

Our approach unifies the recommendation and conversation subtasks into the prompt learning paradigm, and utilizes knowledge-enhanced prompts based on a fixed pre-trained language model (PLM) to fulfill both subtasks in a unified approach.

Language Modelling Recommendation Systems +1

Spin selectivity through chiral polyalanine monolayers on semiconductors

no code implementations31 Dec 2019 Tianhan Liu, Xiaolei Wang, Hailong Wang, Gang Shi, Fan Gao, Honglei Feng, Haoyun Deng, Longqian Hu, Eric Lochner, Pedro Schlottmann, Stephan von Molnár, Yongqing Li, Jianhua Zhao, Peng Xiong

Electrical generation of polarized spins in nonmagnetic materials is of great interest for the underlying physics and device potential.

Applied Physics Strongly Correlated Electrons

Cannot find the paper you are looking for? You can Submit a new open access paper.