Search Results for author: Han-Wei Shen

Found 22 papers, 7 papers with code

Improving Efficiency of Iso-Surface Extraction on Implicit Neural Representations Using Uncertainty Propagation

no code implementations21 Feb 2024 Haoyu Li, Han-Wei Shen

In this paper, we present an improved technique for range analysis by revisiting the arithmetic rules and analyzing the probability distribution of the network output within a spatial region.

PSRFlow: Probabilistic Super Resolution with Flow-Based Models for Scientific Data

no code implementations8 Aug 2023 Jingyi Shen, Han-Wei Shen

The efficient sampling in the Gaussian latent space allows our model to perform uncertainty quantification for the super-resolved results.

Super-Resolution Uncertainty Quantification

Neural Stream Functions

1 code implementation16 Jul 2023 Skylar Wolfgang Wurster, Hanqi Guo, Tom Peterka, Han-Wei Shen

Our approach takes a vector field as input and trains an implicit neural representation to learn a stream function for that vector field.

Adaptively Placed Multi-Grid Scene Representation Networks for Large-Scale Data Visualization

1 code implementation16 Jul 2023 Skylar Wolfgang Wurster, Tianyu Xiong, Han-Wei Shen, Hanqi Guo, Tom Peterka

We address this shortcoming with an adaptively placed multi-grid SRN (APMGSRN) and propose a domain decomposition training and inference technique for accelerated parallel training on multi-GPU systems.

Data Visualization

SKG: A Versatile Information Retrieval and Analysis Framework for Academic Papers with Semantic Knowledge Graphs

no code implementations7 Jun 2023 Yamei Tu, Rui Qiu, Han-Wei Shen

To extract knowledge from unstructured text, we develop a Knowledge Extraction Module that includes a semi-supervised pipeline for entity extraction and entity normalization.

Information Retrieval Knowledge Graphs +1

VMap: An Interactive Rectangular Space-filling Visualization for Map-like Vertex-centric Graph Exploration

no code implementations31 May 2023 Jiayi Xu, Han-Wei Shen

The resulting rectangular layout has better aspect ratio quality on synthetic data compared with the existing method for the rectangular partitioning of 2D points.

GNNInterpreter: A Probabilistic Generative Model-Level Explanation for Graph Neural Networks

1 code implementation15 Sep 2022 Xiaoqi Wang, Han-Wei Shen

In this paper, we propose a model-agnostic model-level explanation method for different GNNs that follow the message passing scheme, GNNInterpreter, to explain the high-level decision-making process of the GNN model.

Decision Making

IDLat: An Importance-Driven Latent Generation Method for Scientific Data

no code implementations5 Aug 2022 Jingyi Shen, Haoyu Li, Jiayi Xu, Ayan Biswas, Han-Wei Shen

We qualitatively and quantitatively evaluate the effectiveness and efficiency of latent representations generated by our method with data from multiple scientific visualization applications.

Data Visualization

VDL-Surrogate: A View-Dependent Latent-based Model for Parameter Space Exploration of Ensemble Simulations

1 code implementation25 Jul 2022 Neng Shi, Jiayi Xu, Haoyu Li, Hanqi Guo, Jonathan Woodring, Han-Wei Shen

In the model inference stage, we predict the latent representations at previously selected viewpoints and decode the latent representations to data space.

On the Importance and Applicability of Pre-Training for Federated Learning

1 code implementation23 Jun 2022 Hong-You Chen, Cheng-Hao Tu, Ziwei Li, Han-Wei Shen, Wei-Lun Chao

To make our findings applicable to situations where pre-trained models are not directly available, we explore pre-training with synthetic data or even with clients' data in a decentralized manner, and found that they can already improve FL notably.

Federated Learning

SmartGD: A GAN-Based Graph Drawing Framework for Diverse Aesthetic Goals

no code implementations13 Jun 2022 Xiaoqi Wang, Kevin Yen, Yifan Hu, Han-Wei Shen

There are a few existing methods that have attempted to develop a flexible solution for optimizing different aesthetic aspects measured by different aesthetic criteria.

Generative Adversarial Network

GNN-Surrogate: A Hierarchical and Adaptive Graph Neural Network for Parameter Space Exploration of Unstructured-Mesh Ocean Simulations

1 code implementation18 Feb 2022 Neng Shi, Jiayi Xu, Skylar W. Wurster, Hanqi Guo, Jonathan Woodring, Luke P. Van Roekel, Han-Wei Shen

Our approach improves the efficiency of parameter space exploration with a surrogate model that predicts the simulation outputs accurately and efficiently.

Reinforcement Learning for Load-balanced Parallel Particle Tracing

no code implementations13 Sep 2021 Jiayi Xu, Hanqi Guo, Han-Wei Shen, Mukund Raj, Skylar W. Wurster, Tom Peterka

Second, we propose a workload estimation model, helping RL agents estimate the workload distribution of processes in future computations.

reinforcement-learning Reinforcement Learning (RL)

DeepGD: A Deep Learning Framework for Graph Drawing Using GNN

no code implementations27 Jun 2021 Xiaoqi Wang, Kevin Yen, Yifan Hu, Han-Wei Shen

In this paper, we propose a Convolutional Graph Neural Network based deep learning framework, DeepGD, which can draw arbitrary graphs once trained.

Deep Hierarchical Super Resolution for Scientific Data

no code implementations30 May 2021 Skylar W. Wurster, Hanqi Guo, Han-Wei Shen, Thomas Peterka, Jiayi Xu

We present a novel technique for hierarchical super resolution (SR) with neural networks (NNs), which upscales volumetric data represented with an octree data structure to a high-resolution uniform grid with minimal seam artifacts on octree node boundaries.

Super-Resolution

Local Latent Representation based on Geometric Convolution for Particle Data Feature Exploration

1 code implementation27 May 2021 Haoyu Li, Han-Wei Shen

Feature related particle data analysis plays an important role in many scientific applications such as fluid simulations, cosmology simulations and molecular dynamics.

Clustering

Document Domain Randomization for Deep Learning Document Layout Extraction

no code implementations20 May 2021 Meng Ling, Jian Chen, Torsten Möller, Petra Isenberg, Tobias Isenberg, Michael Sedlmair, Robert S. Laramee, Han-Wei Shen, Jian Wu, C. Lee Giles

We present document domain randomization (DDR), the first successful transfer of convolutional neural networks (CNNs) trained only on graphically rendered pseudo-paper pages to real-world document segmentation.

Document Layout Analysis

VIS30K: A Collection of Figures and Tables from IEEE Visualization Conference Publications

no code implementations22 Dec 2020 Jian Chen, Meng Ling, Rui Li, Petra Isenberg, Tobias Isenberg, Michael Sedlmair, Torsten Möller, Robert S. Laramee, Han-Wei Shen, Katharina Wünsche, Qiru Wang

We present the VIS30K dataset, a collection of 29, 689 images that represents 30 years of figures and tables from each track of the IEEE Visualization conference series (Vis, SciVis, InfoVis, VAST).

CNNPruner: Pruning Convolutional Neural Networks with Visual Analytics

no code implementations8 Sep 2020 Guan Li, Junpeng Wang, Han-Wei Shen, Kaixin Chen, Guihua Shan, Zhonghua Lu

It considers the importance of convolutional filters through both instability and sensitivity, and allows users to interactively create pruning plans according to a desired goal on model size or accuracy.

An Information-theoretic Visual Analysis Framework for Convolutional Neural Networks

no code implementations2 May 2020 Jingyi Shen, Han-Wei Shen

Despite the great success of Convolutional Neural Networks (CNNs) in Computer Vision and Natural Language Processing, the working mechanism behind CNNs is still under extensive discussions and research.

InSituNet: Deep Image Synthesis for Parameter Space Exploration of Ensemble Simulations

no code implementations1 Aug 2019 Wenbin He, Junpeng Wang, Hanqi Guo, Ko-Chih Wang, Han-Wei Shen, Mukund Raj, Youssef S. G. Nashed, Tom Peterka

We propose InSituNet, a deep learning based surrogate model to support parameter space exploration for ensemble simulations that are visualized in situ.

Image Generation

NNVA: Neural Network Assisted Visual Analysis of Yeast Cell Polarization Simulation

no code implementations19 Apr 2019 Subhashis Hazarika, Haoyu Li, Ko-Chih Wang, Han-Wei Shen, Ching-Shan Chou

We utilize the trained network to perform interactive parameter sensitivity analysis of the original simulation at multiple levels-of-detail as well as recommend optimal parameter configurations using the activation maximization framework of neural networks.

Uncertainty Quantification

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