Search Results for author: Wenwen Li

Found 20 papers, 2 papers with code

GeoAI Reproducibility and Replicability: a computational and spatial perspective

no code implementations15 Apr 2024 Wenwen Li, Chia-Yu Hsu, Sizhe Wang, Peter Kedron

We then discuss the factors that may cause the lack of R&R in GeoAI research, with an emphasis on (1) the selection and use of training data; (2) the uncertainty that resides in the GeoAI model design, training, deployment, and inference processes; and more importantly (3) the inherent spatial heterogeneity of geospatial data and processes.

Segment Anything Model Can Not Segment Anything: Assessing AI Foundation Model's Generalizability in Permafrost Mapping

no code implementations16 Jan 2024 Wenwen Li, Chia-Yu Hsu, Sizhe Wang, Yezhou Yang, Hyunho Lee, Anna Liljedahl, Chandi Witharana, Yili Yang, Brendan M. Rogers, Samantha T. Arundel, Matthew B. Jones, Kenton McHenry, Patricia Solis

To evaluate the performance of large AI vision models, especially Meta's Segment Anything Model (SAM), we implemented different instance segmentation pipelines that minimize the changes to SAM to leverage its power as a foundation model.

Instance Segmentation Semantic Segmentation

GeoAI in Social Science

no code implementations19 Dec 2023 Wenwen Li

GeoAI, or geospatial artificial intelligence, is an exciting new area that leverages artificial intelligence (AI), geospatial big data, and massive computing power to solve problems with high automation and intelligence.

Challenges of building medical image datasets for development of deep learning software in stroke

no code implementations26 Sep 2023 Alessandro Fontanella, Wenwen Li, Grant Mair, Antreas Antoniou, Eleanor Platt, Chloe Martin, Paul Armitage, Emanuele Trucco, Joanna Wardlaw, Amos Storkey

Despite the large amount of brain CT data generated in clinical practice, the availability of CT datasets for deep learning (DL) research is currently limited.

Image Cropping

Assessment of a new GeoAI foundation model for flood inundation mapping

no code implementations25 Sep 2023 Wenwen Li, Hyunho Lee, Sizhe Wang, Chia-Yu Hsu, Samantha T. Arundel

Vision foundation models are a new frontier in Geospatial Artificial Intelligence (GeoAI), an interdisciplinary research area that applies and extends AI for geospatial problem solving and geographic knowledge discovery, because of their potential to enable powerful image analysis by learning and extracting important image features from vast amounts of geospatial data.

Representation Learning

Real-time GeoAI for High-resolution Mapping and Segmentation of Arctic Permafrost Features

no code implementations8 Jun 2023 Wenwen Li, Chia-Yu Hsu, Sizhe Wang, Chandi Witharana, Anna Liljedahl

This paper introduces a real-time GeoAI workflow for large-scale image analysis and the segmentation of Arctic permafrost features at a fine-granularity.

Instance Segmentation Position +2

Semantic Similarity Measure of Natural Language Text through Machine Learning and a Keyword-Aware Cross-Encoder-Ranking Summarizer -- A Case Study Using UCGIS GIS&T Body of Knowledge

no code implementations17 May 2023 Yuanyuan Tian, Wenwen Li, Sizhe Wang, Zhining Gu

Initiated by the University Consortium of Geographic Information Science (UCGIS), GIS&T Body of Knowledge (BoK) is a community-driven endeavor to define, develop, and document geospatial topics related to geographic information science and technologies (GIS&T).

Semantic Similarity Semantic Textual Similarity +1

ACAT: Adversarial Counterfactual Attention for Classification and Detection in Medical Imaging

1 code implementation27 Mar 2023 Alessandro Fontanella, Antreas Antoniou, Wenwen Li, Joanna Wardlaw, Grant Mair, Emanuele Trucco, Amos Storkey

We investigate the best way to generate the saliency maps employed in our architecture and propose a way to obtain them from adversarially generated counterfactual images.

counterfactual

Explainable GeoAI: Can saliency maps help interpret artificial intelligence's learning process? An empirical study on natural feature detection

1 code implementation16 Mar 2023 Chia-Yu Hsu, Wenwen Li

This paper compares popular saliency map generation techniques and their strengths and weaknesses in interpreting GeoAI and deep learning models' reasoning behaviors, particularly when applied to geospatial analysis and image processing tasks.

Object Recognition

GeoAI for Knowledge Graph Construction: Identifying Causality Between Cascading Events to Support Environmental Resilience Research

no code implementations11 Nov 2022 Yuanyuan Tian, Wenwen Li

Knowledge graph technology is considered a powerful and semantically enabled solution to link entities, allowing users to derive new knowledge by reasoning data according to various types of reasoning rules.

graph construction Knowledge Graphs

4G 5G Cell-level Multi-indicator Forecasting based on Dense-MLP

no code implementations22 Jul 2022 Jiacheng Yin, Wenwen Li, Xidong Wang, Xiaozhou Ye, Ye Ouyang

With the development of 4G/5G, the rapid growth of traffic has caused a large number of cell indicators to exceed the warning threshold, and network quality has deteriorated.

Geo-Situation for Modeling Causality of Geo-Events in Knowledge Graphs

no code implementations27 Jun 2022 Shirly Stephen, Wenwen Li, Torsten Hahmann

This paper proposes a framework for representing and reasoning causality between geographic events by introducing the notion of Geo-Situation.

Knowledge Graphs

Ensemble Learning For Mega Man Level Generation

no code implementations27 Jul 2021 Bowei Li, Ruohan Chen, Yuqing Xue, Ricky Wang, Wenwen Li, Matthew Guzdial

Procedural content generation via machine learning (PCGML) is the process of procedurally generating game content using models trained on existing game content.

Ensemble Learning

Learning from Counting: Leveraging Temporal Classification for Weakly Supervised Object Localization and Detection

no code implementations6 Mar 2021 Chia-Yu Hsu, Wenwen Li

This paper reports a new solution of leveraging temporal classification to support weakly supervised object detection (WSOD).

General Classification Object +3

Artificial Intelligence Approaches

no code implementations27 Aug 2019 Yingjie Hu, Wenwen Li, Dawn Wright, Orhun Aydin, Daniel Wilson, Omar Maher, Mansour Raad

Artificial Intelligence (AI) has received tremendous attention from academia, industry, and the general public in recent years.

BIG-bench Machine Learning

Domain Independent SVM for Transfer Learning in Brain Decoding

no code implementations26 Mar 2019 Shuo Zhou, Wenwen Li, Christopher R. Cox, Haiping Lu

We use public data to construct 13 transfer learning tasks in brain decoding, including three interesting multi-source transfer tasks.

Brain Decoding Transfer Learning

Sturm: Sparse Tubal-Regularized Multilinear Regression for fMRI

no code implementations4 Dec 2018 Wenwen Li, Jian Lou, Shuo Zhou, Haiping Lu

While functional magnetic resonance imaging (fMRI) is important for healthcare/neuroscience applications, it is challenging to classify or interpret due to its multi-dimensional structure, high dimensionality, and small number of samples available.

regression

Deep Convolutional Neural Networks for Map-Type Classification

no code implementations26 May 2018 Xiran Zhou, Wenwen Li, Samantha T. Arundel, Jun Liu

To facilitate establishing an automatic approach for accessing the needed map, this paper reports our investigation into using deep learning techniques to recognize seven types of map, including topographic map, terrain map, physical map, urban scene map, the National Map, 3D map, nighttime map, orthophoto map, and land cover classification map.

Classification General Classification +2

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