Yujia Zheng (郑雹昉)

I am an MS student at CMU Philosophy, advised by Prof. Kun Zhang. I recently completed my BS from University of Electronic Science and Technology of China. I previously interned at UC Berkeley and NLPR, and was a summer fellow at EPFL.

My research interests lie primarily in the linear span of causality and machine learning. Currently, I mainly study the following topics: causal discovery, causal representation learning, and structure learning. I am also interested in deep learning from a causal view.

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Project
causal-learn causal-learn: Causal Discovery for Python

Documentation, GitHub

Causal-learn is a Python translation and extension of the Tetrad java code. It offers the implementations of up-to-date causal discovery methods as well as simple and intuitive APIs. Causal-learn is contributed by several groups and I am the major coordinator. This project is under active development, and any comments or suggestions are welcome.

Publications

arXiv On the Identifiability of Nonlinear ICA: Sparsity and Beyond
Yujia Zheng, Ignavier Ng, Kun Zhang
NeurIPS 2022, arXiv

We prove the identifiability of nonlinear ICA with assumptions only on the mixing process, such as Structural Sparsity.

ICML Partial Disentanglement for Domain Adaptation
Lingjing Kong, Shaoan Xie, Weiran Yao, Yujia Zheng, Guangyi Chen, Petar Stojanov, Victor Akinwande, Kun Zhang
ICML 2022, Link

We show that under reasonable assumptions on the data generating process, as well as leveraging the principle of minimality, we can obtain partial identifiability of the changing and invariant parts of the generating process.

ICLR On the Identifiability of Nonlinear ICA with Unconditional Priors
Yujia Zheng, Ignavier Ng, Kun Zhang
ICLR 2022 OSC, Oral, Link

We aim to show the identifiability of nonlinear ICA with unconditional priors under specific conditions on the mixing process, such as independent influences.

arXiv Learning Task-Aware Effective Brain Connectivity for fMRI Analysis with Graph Neural Networks
Yue Yu, Xuan Kan, Hejie Cui, Ran Xu, Yujia Zheng, Xiangchen Song, Yanqiao Zhu, Kun Zhang, Razieh Nabi, Ying Guo, Chao Zhang, Carl Yang
IEEE BigData 2022 BrainNN, arXiv

We propose an end-to-end framework based on task-aware brain connectivity DAG structure generation for fMRI analysis.

NeurIPS Reliable Causal Discovery with Improved Exact Search and Weaker Assumptions
Ignavier Ng, Yujia Zheng, Jiji Zhang, Kun Zhang
NeurIPS 2021, arXiv

We introduce several strategies to improve the scalability of exact score-based methods in the linear Gaussian setting with theoretical guarantees under weaker assumptions.

KDD Learning Elastic Embeddings for Customizing On-Device Recommenders
Tong Chen, Hongzhi Yin, Yujia Zheng, Zi Huang, Yang Wang, Meng Wang
KDD 2021, Oral, arXiv

We present a novel lightweight recommendation paradigm that allows a well-trained recommender to be customized for arbitrary device-specific memory constraints without retraining.

AAAI Cold-start Sequential Recommendation via Meta Learner
Yujia Zheng, Siyi Liu, Zekun Li, Shu Wu
AAAI 2021, arXiv

We explore meta-learning to alleviate cold-start problem without any kind of side information.

RecSys Long-tail Session-based Recommendation
Siyi Liu, Yujia Zheng (corresponding author)
RecSys 2020, arXiv

We introduce Long-tail Recommendation into Session-based Recommendation.

ICDM DGTN: Dual-channel Graph Transition Network for Session-based Recommendation
Yujia Zheng, Siyi Liu, Zekun Li, Shu Wu
ICDM 2020 NeuRec, Long Oral, arXiv

We model the cross-session transitions via a channel-aware graph neural network.

ACAI ADS: Multimedia Dance Video Automatic Scoring Framework Based on Transfer Learning
Yujia Zheng
ACAI 2020, Link

We propose a multimedia dance video automatic scoring framework.

IGTA ReFall: Real-time Fall Detection of Continuous Depth Maps with RFD-Net
Yujia Zheng, Siyi Liu, Zairong Wang, Yunbo Rao
IGTA 2019, Link

We propose a real-time fall detection method for the elderly.


Preprints

arXiv Scalable Estimation of Nonparametric Markov Networks with Mixed-Type Data
Yujia Zheng, Ignavier Ng, Yewen Fan, Kun Zhang
Under review at ICLR 2023, OpenReview

We generalize the characterization of the conditional independence structure to handle general distributions for all data types, thus giving rise to a Markov network structure learning algorithm in one of the most general settings.

arXiv Whole Page Unbiased Learning to Rank
Haitao Mao, Lixin Zou, Yujia Zheng, Jiliang Tang, Xiaokai Chu, Jiashu Zhao, Dawei Yin
Under review at WWW 2023, arXiv

We introduce a new task, namely whole-page unbiased learning to rank, and propose a novel framework to automatically discover and mitigate the biases in an end-to-end manner.

arXiv Source Free Unsupervised Graph Domain Adaptation
Haitao Mao, Lun Du, Yujia Zheng, Qiang Fu, Zelin Li, Xu Chen, Shi Han, Dongmei Zhang
Under review at WWW 2023, arXiv

We propose a new scenario named source free unsupervised graph domain adaptation. In this scenario, the only information we can leverage from the source domain is the well-trained source model, without any exposure to the source graph and its labels.

arXiv Heterogenous Graph Collaborative Filtering
Zekun Li*, Yujia Zheng*, Shu Wu, Xiaoyu Zhang, Liang Wang
Preprint, arXiv

We model user-item interactions as a heterogeneous graph which consists of various edge types.

arXiv Balancing Multi-level Interactions for Session-based Recommendation
Yujia Zheng* (corresponding author), Siyi Liu*, Zailei Zhou
Preprint, arXiv

We introduce Inter-session Item-level Interactions into Session-based Recommendation.

Education
CMU

Aug. 2021 - Present , Carnegie Mellon University ,

MS, Logic, Computation & Methodology

UESTC

Aug. 2017 - June. 2021 , University of Electronic Science and Technology of China ,

BS, Software Engineering, GPA: 3.96/4.0.

Berkeley

Aug. 2019 - Dec. 2019 , University of California, Berkeley ,

Visiting Student, Computational Approaches to Human Learning (CAHL) Research Lab, GPA: 4.0/4.0

NTUST

Feb. 2019 - June. 2019 , National Taiwan University of Science and Technology ,

Exchange Student, Image/Video Processing and Multimedia Lab (IVPML), GPA: 4.0/4.0



Organizational Activities

Publicity Co-Chair of the 38th Conference on Uncertainty in Artificial Intelligence (UAI 2022).

Reviewer/Program Committee

Neural Information Processing Systems (NeurIPS).

International Conference on Machine Learning (ICML).

International Joint Conference on Artificial Intelligence (IJCAI).

AAAI Conference on Artificial Intelligence (AAAI).

The ACM Web Conference (WWW).

The ACM Web Search and Data Mining Conference (WSDM).

Learning on Graphs Conference (LoG).

Pacific-Asia Conference on Knowledge Discovery and Data Mining (PAKDD).

The International AAAI Conference on Web and Social Media (ICWSM).

IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI).

IEEE Transactions on Neural Networks and Learning Systems (TNNLS).

IEEE Transactions on Big Data (TBD).

IEEE Transactions on Information Systems TOIS (TOIS).

Awards and Fellowships

Member of youth delegation in the 73rd session of the UN General Assembly (UNGA 73).

NeurIPS 2022 Scholar Award.

NeurIPS 2022 Top Reviewer.

Summer Research Fellowship at EPFL (<2%).

Top 1% in multiple data competitions.

Tang Lixin Scholarship.


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