Using the Temporal-Trajectory-based K Nearest Neighbor Algorithm to Predict Human Mobility Patterns
Authors: An-Syu Li, Ling-Huan Meng, Yu-Ling Zhong, Yi-Chung Chen, Tomoya Kawakami
Conference: 2nd ACM SIGSPATIAL International Workshop on Human Mobility Prediction Challenge (HuMob-Challenge 2024)
Location: Atlanta, USA, 2024
Pages: 25–28
Human Mobility
K-Nearest Neighbor
Trajectory Prediction
Spatial-Temporal Analysis
Urban Computing
Abstract
This study analyzes historical data to identify three key factors that play critical roles in human mobility patterns. Based on these factors, a temporal-trajectory-based K-nearest neighbor algorithm was developed to predict human flow trajectories. The algorithm demonstrates effectiveness when applied to the HuMob Challenge 2024 dataset, showing how spatial-temporal patterns and individual mobility behaviors can be leveraged for accurate trajectory prediction in urban environments.
Using Generative Pre-trained Transformers for Predictive Modeling of Traffic Accidents in Taiwan
Authors: An-Syu Li, Hao-Quan Liu, Yu-Ling Zhong, Yu-Hao Chen, Cheng-An Tsai, Yi-Chung Chen
Conference: 11th IEEE International Conference on Applied System Innovation (ICASI 2025)
Location: Tokyo, Japan, April 22–25, 2025
GPT
Traffic Safety
Accident Prediction
Transformers
Natural Language Processing
Abstract
This research applies generative pre-trained transformer (GPT) models to predict traffic accidents in Taiwan. By leveraging the natural language processing capabilities of transformers and fine-tuning on traffic accident data, the study demonstrates how large language models can be adapted for predictive modeling in transportation safety. The approach shows promise for understanding complex patterns in accident data and providing actionable insights for traffic management and accident prevention strategies.
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Using Social Media Itineraries and Spatial Discretization Techniques to Create Personalized Travel Recommendation Systems
Authors: An-Syu Li, Yu-Ling Zhong, Yu-Hao Chen, Ya-Chuan Hsu, Yi-Chung Chen
Conference: 11th IEEE International Conference on Applied System Innovation (ICASI 2025)
Location: Tokyo, Japan, April 22–25, 2025
Social Media Mining
Travel Recommendation
Spatial Discretization
Personalization
GIS
Abstract
This paper presents a novel approach to personalized travel recommendation by mining social media itineraries and applying spatial discretization techniques. The system extracts travel patterns from user-generated content and uses spatial analysis methods to create customized travel suggestions. By combining collaborative filtering with geographic information systems, the research demonstrates how social media data can be leveraged to understand travel preferences and generate location-aware recommendations that match individual user interests.
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A Deep Learning–Based Heatmap Travel Recommendation System
Authors: An-Syu Li, Yi-Chung Chen
Conference: ACM SIGSPATIAL GeoAI'25
Deep Learning
Heatmap Visualization
Travel Recommendation
Neural Networks
Geospatial AI
Abstract
This research introduces a deep learning-based travel recommendation system that utilizes heatmap visualization to represent spatial patterns of tourist activity. By training neural networks on geospatial data, the system generates visual representations of popular destinations and personalized recommendations based on user preferences and historical travel patterns. The heatmap approach provides an intuitive interface for exploring travel options while maintaining the sophistication of deep learning models.
Leveraging Synthetic Telecom Data to Support the Development of Community Resilience Applications
Authors: Shih-Chun Lin, An-Syu Li, Yi-Chung Chen, Tzu-Yin Chang, Rong-Kang Shang
Conference: ACM SIGSPATIAL SpatialConnect'25
Synthetic Data
Privacy Preservation
Community Resilience
Telecommunications
Emergency Response
Abstract
This paper explores the use of synthetic telecommunications data for building community resilience applications. The research addresses privacy concerns while maintaining data utility by generating synthetic datasets that preserve the statistical properties of real telecom data. The study demonstrates how synthetic data can enable the development and testing of emergency response systems, disaster management tools, and community connectivity applications without compromising individual privacy.
MulSAFER: A Framework for Extraction and Interpretation of Safe Mobility Paths from Multimodal Spatial Data
Authors: Yi-Wen Hung, An-Syu Li, Shih-Chun Lin, Han-Chi Chen, Chi-Tsun Lin, Yi-Chung Chen
Conference: ACM GeoSearch 2025
Safe Mobility
Multimodal Data
Route Planning
Machine Learning
Transportation Safety
Abstract
MulSAFER introduces a comprehensive framework for extracting and interpreting safe mobility routes from multimodal spatial data sources. The system integrates data from traffic sensors, accident reports, infrastructure information, and environmental factors to identify the safest paths for various transportation modes. By combining machine learning with geographic analysis, MulSAFER provides interpretable recommendations that balance safety considerations with travel efficiency.
Using Conditional Adversarial Generative Networks and Aerial Images to Draw Urban Intersection Markings in Different National Styles
Authors: Yang-Chou Juan, Chun-Chieh Yang, An-Syu Li, Chang-Hung Shih, Ming-Min Kao, Yi-Chung Chen
Conference: ACM SIGSPATIAL SpatialConnect'25
CGAN
Generative AI
Aerial Imagery
Urban Planning
Road Markings
Abstract
This innovative research applies conditional adversarial generative networks (CGAN) to automatically generate urban intersection road markings in different national styles from aerial imagery. The system learns the characteristic patterns of road markings across various countries and can synthesize appropriate markings for new intersections while adhering to local standards. This approach has significant implications for automated mapping, urban planning, and infrastructure development.
Advancing Privacy-Preserving Synthetic Data Generation: A DeBERTa-CGAN Framework for Robust Natural Language Inference
Authors: An-Syu Li, Yu-Hao Chen, Yi-Chung Chen
Status: Manuscript in Preparation
DeBERTa
CGAN
Privacy Preservation
NLP
Synthetic Data Generation
Abstract
This work presents a novel framework combining DeBERTa (Decoding-enhanced BERT with disentangled attention) with Conditional Generative Adversarial Networks for privacy-preserving synthetic data generation. The framework focuses on generating synthetic text data that preserves the semantic and statistical properties of original datasets while protecting individual privacy. The research demonstrates robust performance on natural language inference tasks, showing that synthetic data can effectively replace real data in machine learning applications without compromising model accuracy.
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GeoChronos-GPT: A Spatiotemporal Transformer Framework for Personalized Point of Interest Recommendation
Authors: An-Syu Li, Wei-Ting Lai, Sheng-Min Chiu, Yi-Chung Chen
Status: Manuscript in Preparation
GPT
Spatiotemporal Transformer
POI Recommendation
Deep Learning
Personalization
Abstract
This research presents GeoChronos-GPT, a novel spatiotemporal transformer framework designed for personalized point of interest (POI) recommendation. The framework leverages transformer architecture to capture complex temporal patterns and spatial dependencies in user mobility data, enabling accurate prediction of future visit locations. By combining the sequential modeling capabilities of GPT-style transformers with geospatial analysis techniques, GeoChronos-GPT provides context-aware recommendations that account for both individual user preferences and broader spatiotemporal trends in location-based services.
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