Search Results for author: Dongjie Wang

Found 29 papers, 7 papers with code

Knockoff-Guided Feature Selection via A Single Pre-trained Reinforced Agent

1 code implementation6 Mar 2024 Xinyuan Wang, Dongjie Wang, Wangyang Ying, Rui Xie, Haifeng Chen, Yanjie Fu

A deep Q-network, pre-trained with the original features and their corresponding pseudo labels, is employed to improve the efficacy of the exploration process in feature selection.

feature selection Pseudo Label

Feature Selection as Deep Sequential Generative Learning

no code implementations6 Mar 2024 Wangyang Ying, Dongjie Wang, Haifeng Chen, Yanjie Fu

(2) We leverage the trained feature subset utility evaluator as a gradient provider to guide the identification of the optimal feature subset embedding;(3) We decode the optimal feature subset embedding to autoregressively generate the best feature selection decision sequence with autostop.

feature selection

Dual-stage Flows-based Generative Modeling for Traceable Urban Planning

no code implementations3 Oct 2023 Xuanming Hu, Wei Fan, Dongjie Wang, Pengyang Wang, Yong Li, Yanjie Fu

We design several experiments to indicate that our framework can outperform compared to other generative models for the urban planning task.

Feature Interaction Aware Automated Data Representation Transformation

1 code implementation29 Sep 2023 Ehtesamul Azim, Dongjie Wang, Kunpeng Liu, Wei zhang, Yanjie Fu

Creating an effective representation space is crucial for mitigating the curse of dimensionality, enhancing model generalization, addressing data sparsity, and leveraging classical models more effectively.

Automated Feature Engineering Decision Making +4

Self-optimizing Feature Generation via Categorical Hashing Representation and Hierarchical Reinforcement Crossing

1 code implementation8 Sep 2023 Wangyang Ying, Dongjie Wang, Kunpeng Liu, Leilei Sun, Yanjie Fu

Feature generation aims to generate new and meaningful features to create a discriminative representation space. A generated feature is meaningful when the generated feature is from a feature pair with inherent feature interaction.

Descriptive

Traceable Group-Wise Self-Optimizing Feature Transformation Learning: A Dual Optimization Perspective

1 code implementation29 Jun 2023 Meng Xiao, Dongjie Wang, Min Wu, Kunpeng Liu, Hui Xiong, Yuanchun Zhou, Yanjie Fu

Feature transformation aims to reconstruct an effective representation space by mathematically refining the existing features.

Feature Engineering Q-Learning

Disentangled Causal Graph Learning for Online Unsupervised Root Cause Analysis

no code implementations18 May 2023 Dongjie Wang, Zhengzhang Chen, Yanjie Fu, Yanchi Liu, Haifeng Chen

In this paper, we propose CORAL, a novel online RCA framework that can automatically trigger the RCA process and incrementally update the RCA model.

Graph Learning

Towards Automated Urban Planning: When Generative and ChatGPT-like AI Meets Urban Planning

no code implementations8 Apr 2023 Dongjie Wang, Chang-Tien Lu, Yanjie Fu

The two fields of urban planning and artificial intelligence (AI) arose and developed separately.

Beyond Discrete Selection: Continuous Embedding Space Optimization for Generative Feature Selection

no code implementations26 Feb 2023 Meng Xiao, Dongjie Wang, Min Wu, Pengfei Wang, Yuanchun Zhou, Yanjie Fu

Furthermore, we reconstruct feature selection solutions using these embeddings and select the feature subset with the highest performance for downstream tasks as the optimal subset.

feature selection

Deep Graph Stream SVDD: Anomaly Detection in Cyber-Physical Systems

1 code implementation24 Feb 2023 Ehtesamul Azim, Dongjie Wang, Yanjie Fu

The temporal embeddings are mapped to the new graph as node attributes to form weighted attributed graph.

Anomaly Detection

Dish-TS: A General Paradigm for Alleviating Distribution Shift in Time Series Forecasting

1 code implementation22 Feb 2023 Wei Fan, Pengyang Wang, Dongkun Wang, Dongjie Wang, Yuanchun Zhou, Yanjie Fu

The distribution shift in Time Series Forecasting (TSF), indicating series distribution changes over time, largely hinders the performance of TSF models.

Time Series Time Series Forecasting

Traceable Automatic Feature Transformation via Cascading Actor-Critic Agents

1 code implementation27 Dec 2022 Meng Xiao, Dongjie Wang, Min Wu, Ziyue Qiao, Pengfei Wang, Kunpeng Liu, Yuanchun Zhou, Yanjie Fu

Feature transformation for AI is an essential task to boost the effectiveness and interpretability of machine learning (ML).

feature selection

Boosting Urban Traffic Speed Prediction via Integrating Implicit Spatial Correlations

no code implementations25 Dec 2022 Dongkun Wang, Wei Fan, Pengyang Wang, Pengfei Wang, Dongjie Wang, Denghui Zhang, Yanjie Fu

To tackle the challenge, we propose a generic model for enabling the current traffic speed prediction methods to preserve implicit spatial correlations.

Human-instructed Deep Hierarchical Generative Learning for Automated Urban Planning

no code implementations1 Dec 2022 Dongjie Wang, Lingfei Wu, Denghui Zhang, Jingbo Zhou, Leilei Sun, Yanjie Fu

The third stage is to leverage multi-attentions to model the zone-zone peer dependencies of the functionality projections to generate grid-level land-use configurations.

Automated Urban Planning aware Spatial Hierarchies and Human Instructions

no code implementations26 Sep 2022 Dongjie Wang, Kunpeng Liu, Yanyong Huang, Leilei Sun, Bowen Du, Yanjie Fu

While automated urban planners have been examined, they are constrained because of the following: 1) neglecting human requirements in urban planning; 2) omitting spatial hierarchies in urban planning, and 3) lacking numerous urban plan data samples.

Self-Optimizing Feature Transformation

no code implementations16 Sep 2022 Meng Xiao, Dongjie Wang, Min Wu, Kunpeng Liu, Hui Xiong, Yuanchun Zhou, Yanjie Fu

Feature transformation aims to extract a good representation (feature) space by mathematically transforming existing features.

Feature Engineering Outlier Detection

C$^{2}$IMUFS: Complementary and Consensus Learning-based Incomplete Multi-view Unsupervised Feature Selection

no code implementations20 Aug 2022 Yanyong Huang, Zongxin Shen, Yuxin Cai, Xiuwen Yi, Dongjie Wang, Fengmao Lv, Tianrui Li

Besides, learning the complete similarity graph, as an important promising technology in existing MUFS methods, cannot achieve due to the missing views.

feature selection

Group-wise Reinforcement Feature Generation for Optimal and Explainable Representation Space Reconstruction

no code implementations28 May 2022 Dongjie Wang, Yanjie Fu, Kunpeng Liu, Xiaolin Li, Yan Solihin

We reformulate representation space reconstruction into an interactive process of nested feature generation and selection, where feature generation is to generate new meaningful and explicit features, and feature selection is to eliminate redundant features to control feature sizes.

Feature Engineering feature selection +1

Reinforced Imitative Graph Learning for Mobile User Profiling

no code implementations13 Mar 2022 Dongjie Wang, Pengyang Wang, Yanjie Fu, Kunpeng Liu, Hui Xiong, Charles E. Hughes

The profiling framework is formulated into a reinforcement learning task, where an agent is a next-visit planner, an action is a POI that a user will visit next, and the state of the environment is a fused representation of a user and spatial entities.

Graph Learning

Online POI Recommendation: Learning Dynamic Geo-Human Interactions in Streams

no code implementations19 Jan 2022 Dongjie Wang, Kunpeng Liu, Hui Xiong, Yanjie Fu

An event that a user visits a POI in stream updates the states of both users and geospatial contexts; the agent perceives the updated environment state to make online recommendations.

reinforcement-learning Reinforcement Learning (RL)

Deep Human-guided Conditional Variational Generative Modeling for Automated Urban Planning

no code implementations12 Oct 2021 Dongjie Wang, Kunpeng Liu, Pauline Johnson, Leilei Sun, Bowen Du, Yanjie Fu

Existing studies usually ignore the need of personalized human guidance in planning, and spatial hierarchical structure in planning generation.

Image Generation

Efficient Reinforced Feature Selection via Early Stopping Traverse Strategy

no code implementations29 Sep 2021 Kunpeng Liu, Pengfei Wang, Dongjie Wang, Wan Du, Dapeng Oliver Wu, Yanjie Fu

In this paper, we propose a single-agent Monte Carlo based reinforced feature selection (MCRFS) method, as well as two efficiency improvement strategies, i. e., early stopping (ES) strategy and reward-level interactive (RI) strategy.

feature selection

Automated Feature-Topic Pairing: Aligning Semantic and Embedding Spaces in Spatial Representation Learning

no code implementations22 Sep 2021 Dongjie Wang, Kunpeng Liu, David Mohaisen, Pengyang Wang, Chang-Tien Lu, Yanjie Fu

Texts of spatial entities, on the other hand, provide semantic understanding of latent feature labels, but is insensible to deep SRL models.

Representation Learning

Defending Water Treatment Networks: Exploiting Spatio-temporal Effects for Cyber Attack Detection

no code implementations26 Aug 2020 Dongjie Wang, Pengyang Wang, Jingbo Zhou, Leilei Sun, Bowen Du, Yanjie Fu

To this end, we propose a structured anomaly detection framework to defend WTNs by modeling the spatio-temporal characteristics of cyber attacks in WTNs.

Anomaly Detection Attribute +2

Reimagining City Configuration: Automated Urban Planning via Adversarial Learning

no code implementations22 Aug 2020 Dongjie Wang, Yanjie Fu, Pengyang Wang, Bo Huang, Chang-Tien Lu

The objective is then to propose an adversarial learning framework that can automatically generate such tensor for an unplanned area.

DeepSTCL: A Deep Spatio-temporal ConvLSTM for Travel Demand Prediction

no code implementations22 Aug 2020 Dongjie Wang, Yan Yang, Shangming Ning

Urban resource scheduling is an important part of the development of a smart city, and transportation resources are the main components of urban resources.

Scheduling Time Series Analysis

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