Search Results for author: Nan Chen

Found 16 papers, 6 papers with code

CGNSDE: Conditional Gaussian Neural Stochastic Differential Equation for Modeling Complex Systems and Data Assimilation

2 code implementations10 Apr 2024 Chuanqi Chen, Nan Chen, Jin-Long Wu

Then, neural networks are supplemented to the knowledge-based model in a specific way, which not only characterizes the remaining features that are challenging to model with simple forms but also advances the use of analytic formulae to efficiently compute the nonlinear DA solution.

Causal Inference

Benchmarking Data Science Agents

1 code implementation27 Feb 2024 Yuge Zhang, Qiyang Jiang, Xingyu Han, Nan Chen, Yuqing Yang, Kan Ren

In this paper, we introduce DSEval -- a novel evaluation paradigm, as well as a series of innovative benchmarks tailored for assessing the performance of these agents throughout the entire data science lifecycle.

Benchmarking Decision Making

Integrating Active Learning in Causal Inference with Interference: A Novel Approach in Online Experiments

no code implementations20 Feb 2024 Hongtao Zhu, Sizhe Zhang, Yang Su, Zhenyu Zhao, Nan Chen

In the domain of causal inference research, the prevalent potential outcomes framework, notably the Rubin Causal Model (RCM), often overlooks individual interference and assumes independent treatment effects.

Active Learning Causal Inference

FlowHON: Representing Flow Fields Using Higher-Order Networks

no code implementations4 Dec 2023 Nan Chen, Zhihong Li, Jun Tao

FlowHON captures the inherent higher-order dependencies in flow fields as nodes and estimates the transitions among them as edges.

Management

A Survey of Imbalanced Learning on Graphs: Problems, Techniques, and Future Directions

1 code implementation26 Aug 2023 Zemin Liu, Yuan Li, Nan Chen, Qian Wang, Bryan Hooi, Bingsheng He

However, these methods often suffer from data imbalance, a common issue in graph data where certain segments possess abundant data while others are scarce, thereby leading to biased learning outcomes.

Graph Learning Link Prediction +1

CEBoosting: Online Sparse Identification of Dynamical Systems with Regime Switching by Causation Entropy Boosting

1 code implementation16 Apr 2023 Chuanqi Chen, Nan Chen, Jin-Long Wu

In addition, the CEBoosting method is applied to a nonlinear paradigm model for topographic mean flow interaction, demonstrating the online detection of regime switching in the presence of strong intermittency and extreme events.

A Causality-Based Learning Approach for Discovering the Underlying Dynamics of Complex Systems from Partial Observations with Stochastic Parameterization

no code implementations19 Aug 2022 Nan Chen, Yinling Zhang

In this paper, a new iterative learning algorithm for complex turbulent systems with partial observations is developed that alternates between identifying model structures, recovering unobserved variables, and estimating parameters.

Causal Inference

LASSO-Based Multiple-Line Outage Identification In Partially Observable Power Systems

no code implementations5 Jun 2022 Xiaozhou Yang, Nan Chen

Tested on IEEE 39-bus system with 25% and 50% PMU coverage, the proposed identification method is 93% and 80% accurate for single- and double-line outages.

MC-UNet Multi-module Concatenation based on U-shape Network for Retinal Blood Vessels Segmentation

1 code implementation7 Apr 2022 Ting Zhang, Jun Li, Yi Zhao, Nan Chen, Han Zhou, Hongtao Xu, Zihao Guan, Changcai Yang, Lanyan Xue, Riqing Chen, Lifang Wei

The proposed network structure retains three layers the essential structure of U-Net, in which the atrous convolution combining the multi-kernel pooling blocks are designed to obtain more contextual information.

Segmentation

Dynamic Power Systems Line Outage Detection Using Particle Filter and Partially Observed States

no code implementations14 Jul 2021 Xiaozhou Yang, Nan Chen, Chao Zhai

Real-time transmission line outage detection is difficult because of partial phasor measurement unit (PMU) deployment and varying outage signal strength.

Dynamic RAN Slicing for Service-Oriented Vehicular Networks via Constrained Learning

no code implementations3 Dec 2020 Wen Wu, Nan Chen, Conghao Zhou, Mushu Li, Xuemin Shen, Weihua Zhuang, Xu Li

To obtain an optimal RAN slicing policy for accommodating the spatial-temporal dynamics of vehicle traffic density, we first formulate a constrained RAN slicing problem with the objective to minimize long-term system cost.

Reinforcement Learning (RL)

Visual Causality Analysis of Event Sequence Data

no code implementations1 Sep 2020 Zhuochen Jin, Shunan Guo, Nan Chen, Daniel Weiskopf, David Gotz, Nan Cao

Unfortunately, recovering causalities from observational event sequences is challenging, as the heterogeneous and high-dimensional event variables are often connected to rather complex underlying event excitation mechanisms that are hard to infer from limited observations.

Energy and Information Management of Electric Vehicular Network: A Survey

no code implementations17 May 2020 Nan Chen, Miao Wang, Ning Zhang, Xuemin, Shen

In this paper, we provide a comprehensive survey on the deployment and management of EVN considering all three aspects of energy flow, data communication, and computation.

Management Scheduling

Task-Oriented Optimal Sequencing of Visualization Charts

1 code implementation7 Aug 2019 Danqing Shi, Yang Shi, Xinyue Xu, Nan Chen, Siwei Fu, Hongjin Wu, Nan Cao

A chart sequence is used to describe a series of visualization charts generated in the exploratory analysis by data analysts.

Anomaly Detection

Assessing four Neural Networks on Handwritten Digit Recognition Dataset (MNIST)

no code implementations16 Nov 2018 Feiyang Chen, Nan Chen, Hanyang Mao, Hanlin Hu

Another inspiring result is that CapsNet only needs a small amount of data to get excellent performance.

Handwritten Digit Recognition

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