Duen-Ren Liu

131 papers A* 2A 1B 5C 8Misc 6Journal 78Unranked 29
YearRankTypeTitle / Venue / Authors
2024 J jnl
A Clustering-Based Deep Learning Method for Water Level Prediction.
IEICE Trans. Inf. Syst.
Chih-Ping Wang, Duen-Ren Liu
2024 — conf
Game Recommendation Based on Reviews and Neighbor Interaction with Generative Adversarial Networks.
IIAI-AAI
Bo-Yi Pei, Duen-Ren Liu, Jian-Heng Chen
2024 J jnl
News recommendations based on collaborative topic modeling and collaborative filtering with generative adversarial networks.
Data Technol. Appl.
Duen-Ren Liu, Yang Huang, Jhen-Jie Jhao, Shin-Jye Lee
2024 J jnl
Power Peak Load Forecasting Based on Deep Time Series Analysis Method.
IEICE Trans. Inf. Syst.
Ying-Chang Hung, Duen-Ren Liu
2023 J jnl
Hybrid Generative Adversarial Networks for News Recommendation.
J. Inf. Sci. Eng.
Duen-Ren Liu, Yang Huang, Ching-Yi Tseng, Shin-Jye Lee
2023 J jnl
Talent recommendation based on attentive deep neural network and implicit relationships of resumes.
Inf. Process. Manag.
Yang Huang, Duen-Ren Liu, Shin-Jye Lee
2022 J jnl
A boosting resampling method for regression based on a conditional variational autoencoder.
Inf. Sci.
Yang Huang, Duen-Ren Liu, Shin-Jye Lee, Chia-Hao Hsu, Yang-Guang Liu
2022 J jnl
Credit default swap prediction based on generative adversarial networks.
Data Technol. Appl.
Shu-Ying Lin, Duen-Ren Liu, Hsien-Pin Huang
2022 J jnl
Online Product Recommendations based on Diversity and Latent Association Analysis on News and Products.
J. Inf. Sci. Eng.
Hsing-Yu Chen, Yu-Chun Lin, Duen-Ren Liu, Tzeng-Feng Liu
2022 J jnl
Random RotBoost: An Ensemble Classification Method Based on Rotation Forest and AdaBoost in Random Subsets and Its Application to Clinical Decision Support.
Entropy
Shin-Jye Lee, Ching-Hsun Tseng, Hui-Yu Yang, Xin Jin, Qian Jiang, Bin Pu, Wei-Huan Hu, Duen-Ren Liu, Yang Huang, Na Zhao
2021 J jnl
A hybrid of XGBoost and aspect-based review mining with attention neural network for user preference prediction.
Int. J. Mach. Learn. Cybern.
Chin-Hui Lai, Duen-Ren Liu, Kun-Sin Lien
2021 J jnl
Air pollution prediction based on factory-aware attentional LSTM neural network.
Computing
Duen-Ren Liu, Yi-Kuan Hsu, Hsing-Yu Chen, Huan-Jian Jau
2020 J jnl
Air pollution forecasting based on attention-based LSTM neural network and ensemble learning.
Expert Syst. J. Knowl. Eng.
Duen-Ren Liu, Shin-Jye Lee, Yang Huang, Chien-Ju Chiu
2020 J jnl
Integrating collaborative topic modeling and diversity for movie recommendations during news browsing.
Kybernetes
Duen-Ren Liu, Yun-Cheng Chou, Ciao-Ting Jian
2020 J jnl
Rating Prediction Based on Merge-CNN and Concise Attention Review Mining.
IEEE Access
Yun-Cheng Chou, Hsing-Yu Chen, Duen-Ren Liu, Der-Shiuan Chang
2019 J jnl
Advertisement recommendation based on personal interests and ad push fairness.
Kybernetes
Duen-Ren Liu, Yu-Shan Liao, Ya-Han Chung, Kuan-Yu Chen
2019 J jnl
Churn prediction and social neighbour influences for different types of user groups in virtual worlds.
Expert Syst. J. Knowl. Eng.
Duen-Ren Liu, Hsiu-Yu Liao, Kuan-Yu Chen, Yi-Ling Chiu
2019 Misc conf
News Recommendation Based on Collaborative Semantic Topic Models and Recommendation Adjustment.
ICMLC
Yu-Shan Liao, Jun-Yi Lu, Duen-Ren Liu
2019 J jnl
Online news recommendations based on topic modeling and online interest adjustment.
Ind. Manag. Data Syst.
Duen-Ren Liu, Yu-Shan Liao, Jun-Yi Lu
2018 — conf
Online Recommendation Based on Collaborative Topic Modeling and Item Diversity.
IIAI-AAI
Duen-Ren Liu, Yun-Cheng Chou, Ciao-Ting Jian
2018 J jnl
Online recommendations based on dynamic adjustment of recommendation lists.
Knowl. Based Syst.
Duen-Ren Liu, Kuan-Yu Chen, Yun-Cheng Chou, Jia-Huei Lee
2018 J jnl
Recommender system based on social influence and the virtual house bandwagon effect in virtual worlds.
Kybernetes
Duen-Ren Liu, Yun-Cheng Chou, Chi-Ching Chung, Hsiu-Yu Liao
2017 — conf
An Online Activity Recommendation Approach Based on the Dynamic Adjustment of Recommendation Lists.
IIAI-AAI
Duen-Ren Liu, Kuan-Yu Chen, Yun-Cheng Chou, Jia-Huei Lee
2016 J jnl
A Hybrid Neural Network Model for Sales Forecasting Based on ARIMA and Search Popularity of Article Titles.
Comput. Intell. Neurosci.
Hani A. Omar, Van Hai Hoang, Duen-Ren Liu
2016 — conf
Product Recommendations Based on the Bandwagon Effect of Virtual Houses in Virtual Worlds.
IIAI-AAI
Yun-Cheng Chou, Chi-Ching Chung, Hsiu-Yu Liao, Duen-Ren Liu
2015 J jnl
A Uniform Framework for Rough Approximations Based on Generalized Quantifiers.
Trans. Rough Sets
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2015 J jnl
Complementary QA network analysis for QA retrieval in social question-answering websites.
J. Assoc. Inf. Sci. Technol.
Duen-Ren Liu, Yu-Hsuan Chen, Minxin Shen, Pei-Jung Lu
2015 — conf
Customer Churn Prediction in Virtual Worlds.
IIAI-AAI
Hsiu-Yu Liao, Kuan-Yu Chen, Duen-Ren Liu, Yi-Ling Chiu
2015 — conf
Intelligent Power Resource Allocation by Context-Based Usage Mining.
IIAI-AAI
Yu-Shan Liao, Hsiu-Yu Liao, Duen-Ren Liu, Wen-Ting Fan, Hani A. Omar
2015 J jnl
Outlier detection from vehicle trajectories to discover roaming events.
Inf. Sci.
Minxin Shen, Duen-Ren Liu, Shi-Han Shann
2015 J jnl
Recommendations based on personalized tendency for different aspects of influences in social media.
J. Inf. Sci.
Chin-Hui Lai, Duen-Ren Liu, Mei-Lan Liu
2015 J jnl
Recommending blog articles based on popular event trend analysis.
Inf. Sci.
Duen-Ren Liu, Hani A. Omar, Chuen-He Liou, Huai-Chun Chi, Cheng-Ho Hsu
2015 J jnl
Virtual friend recommendations in virtual worlds.
Decis. Support Syst.
Hsiu-Yu Liao, Kuan-Yu Chen, Duen-Ren Liu
2014 J jnl
Hybrid content filtering and reputation-based popularity for recommending blog articles.
Online Inf. Rev.
Duen-Ren Liu, Chuen-He Liou, Chi-Chieh Peng, Huai-Chun Chi
2014 J jnl
QA document recommendations for communities of question-answering websites.
Knowl. Based Syst.
Duen-Ren Liu, Yu-Hsuan Chen, Chun-Kai Huang
2013 — conf
Discovering Workflow-Aware Virtual Knowledge Flows for Knowledge Dissemination.
EC-Web
Minxin Shen, Duen-Ren Liu
2013 J jnl
Discovering role-based virtual knowledge flows for organizational knowledge support.
Decis. Support Syst.
Duen-Ren Liu, Chih-Wei Lin, Hui-Fang Chen
2013 J jnl
Integrating expert profile, reputation and link analysis for expert finding in question-answering websites.
Inf. Process. Manag.
Duen-Ren Liu, Yu-Hsuan Chen, Wei-Chen Kao, Hsiu-Wen Wang
2013 J jnl
Novel personal and group-based trust models in collaborative filtering for document recommendation.
Inf. Sci.
Chin-Hui Lai, Duen-Ren Liu, Cai-Sin Lin
2013 — conf
Recommendations Based on Different Aspects of Influences in Social Media.
EC-Web
Chin-Hui Lai, Duen-Ren Liu, Mei-Lan Liu
2013 — conf
Recommending QA Documents for Communities of Question-Answering Websites.
ACIIDS (2)
Duen-Ren Liu, Chun-Kai Huang, Yu-Hsuan Chen
2013 J jnl
Recommending Quality Book Reviews from Heterogeneous Websites.
Internet Res.
Duen-Ren Liu, Wei-Hsiao Chen, Po-Huan Chiu
2013 J jnl
Variable consistency and variable precision models for dominance-based fuzzy rough set analysis of possibilistic information systems.
Int. J. Gen. Syst.
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2012 C conf
Applying Personal and Group-based Trust Models in Document Recommendation.
DATA
Chin-Hui Lai, Duen-Ren Liu, Cai-Sin Lin
2012 J jnl
Document recommendations based on knowledge flows: A hybrid of personalized and group-based approaches.
J. Assoc. Inf. Sci. Technol.
Duen-Ren Liu, Chin-Hui Lai, Ya-Ting Chen
2012 — conf
Enhancing Sales Forecasting by Using Neuro Networks and the Popularity of Magazine Article Titles.
ICGEC
Hani A. Omar, Duen-Ren Liu
2012 J jnl
Extracting semantic relations to enrich domain ontologies.
J. Intell. Inf. Syst.
Minxin Shen, Duen-Ren Liu, Yu-Siang Huang
2012 J jnl
Hybrid recommendations for mobile commerce based on mobile phone features.
Expert Syst. J. Knowl. Eng.
Chuen-He Liou, Duen-Ren Liu
2012 J jnl
Modeling the knowledge-flow view for collaborative knowledge support.
Knowl. Based Syst.
Duen-Ren Liu, Chih-Wei Lin
2012 C conf
Variable Precision Fuzzy Rough Set Based on Relative Cardinality.
FedCSIS
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2011 J jnl
A Logical Formulation of Rough Set Definability.
Int. J. Uncertain. Fuzziness Knowl. Based Syst.
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2011 J jnl
A relational perspective of attribute reduction in rough set-based data analysis.
Eur. J. Oper. Res.
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2011 — conf
Dominance-Based Rough Set Approach for Possibilistic Information Systems.
RSFDGrC
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2011 J jnl
Dominance-based fuzzy rough set analysis of uncertain and possibilistic data tables.
Int. J. Approx. Reason.
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2011 J jnl
Hybrid-patent classification based on patent-network analysis.
J. Assoc. Inf. Sci. Technol.
Duen-Ren Liu, Meng-Jung Shih
2011 J jnl
Mining group-based knowledge flows for sharing task knowledge.
Decis. Support Syst.
Duen-Ren Liu, Chin-Hui Lai
2011 J jnl
Mobile commerce product recommendations based on hybrid multiple channels.
Electron. Commer. Res. Appl.
Duen-Ren Liu, Chuen-He Liou
2011 J jnl
Personalized recommendation of popular blog articles for mobile applications.
Inf. Sci.
Duen-Ren Liu, Pei-Yun Tsai, Po-Huan Chiu
2011 — conf
Recommending Documents via Knowledge Flow-based Group Recommendation.
ICSOFT (2)
Chin-Hui Lai, Duen-Ren Liu, Ya-Ting Chen
2011 J jnl
Sequence-based trust in collaborative filtering for document recommendation.
Int. J. Hum. Comput. Stud.
Duen-Ren Liu, Chin-Hui Lai, Hsuan Chiu
2010 C conf
Combining reputation and content-based filtering for blog article recommendation in social bookmarking websites.
ICEC
Chi-Chieh Peng, Duen-Ren Liu
2010 B conf
Constraint-based attribute reduction in rough set analysis.
SMC
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2010 J jnl
Discovering competitive intelligence by mining changes in patent trends.
Expert Syst. Appl.
Meng-Jung Shih, Duen-Ren Liu, Ming-Li Hsu
2010 Misc conf
Expert finding in question-answering websites: a novel hybrid approach.
SAC
Wei-Chen Kao, Duen-Ren Liu, Shiu-Wen Wang
2010 — conf
Hybrid Multiple Channels-Based Recommendations for Mobile Commerce.
HICSS
Chuen-He Liou, Duen-Ren Liu
2010 — conf
Patent Classification Using Ontology-Based Patent Network Analysis.
PACIS
Meng-Jung Shih, Duen-Ren Liu
2009 J jnl
A hybrid of sequential rules and collaborative filtering for product recommendation.
Inf. Sci.
Duen-Ren Liu, Chin-Hui Lai, Wang-Jung Lee
2009 — conf
Dominance-based Rough Set Analysis for Uncertain Data Tables.
IFSA/EUSFLAT Conf.
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2009 J jnl
Integrating knowledge flow mining and collaborative filtering to support document recommendation.
J. Syst. Softw.
Chin-Hui Lai, Duen-Ren Liu
2009 J jnl
Learning dynamic information needs: A collaborative topic variation inspection approach.
J. Assoc. Inf. Sci. Technol.
I-Chin Wu, Duen-Ren Liu, Pei-Cheng Chang
2009 Misc conf
MPF-based Hybrid Recommendations for Mobile Commerce.
IKE
Chuen-He Liou, Duen-Ren Liu
2009 J jnl
Mining the change of event trends for decision support in environmental scanning.
Expert Syst. Appl.
Duen-Ren Liu, Meng-Jung Shih, Churn-Jung Liau, Chin-Hui Lai
2009 — conf
Personalized Popular Blog Recommender Service for Mobile Applications.
EC-Web
Pei-Yun Tsai, Duen-Ren Liu
2009 — conf
Sequence-Based Trust for Document Recommendation.
EC-Web
Hsuan Chiu, Duen-Ren Liu, Chin-Hui Lai
2008 — ch.
A Bipolar Interpretation of Fuzzy Decision Trees.
Data Mining: Foundations and Practice
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2008 J jnl
Collaborative relevance assessment for task-based knowledge support.
Decis. Support Syst.
Duen-Ren Liu, I-Chin Wu
2008 A conf
Definability in Logic and Rough Set Theory.
ECAI
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu
2008 J jnl
Document recommendation for knowledge sharing in personal folder environments.
J. Syst. Softw.
Duen-Ren Liu, Chin-Hui Lai, Chiu-Wen Huang
2008 J jnl
Knowledge maps for composite e-services: A mining-based system platform coupling with recommendations.
Expert Syst. Appl.
Duen-Ren Liu, Chih-Kun Ke, Jia-Yuan Lee, Chun-Feng Lee
2008 B conf
Mining Changes in Patent Trends for Competitive Intelligence.
PAKDD
Meng-Jung Shih, Duen-Ren Liu, Ming-Li Hsu
2008 Misc conf
Mining knowledge flow for modeling the information needs of task-based groups.
IRI
Chin-Hui Lai, Duen-Ren Liu
2008 J jnl
Product recommendation approaches: Collaborative filtering via customer lifetime value and customer demands.
Expert Syst. Appl.
Ya-Yueh Shih, Duen-Ren Liu
2008 J jnl
Toward incorporating a task-stage identification technique into the long-term document support process.
Inf. Process. Manag.
I-Chin Wu, Duen-Ren Liu, Pei-Cheng Chang
2007 — conf
A Hybrid of Sequential Rules and Collaborative Filtering for Product Recommendation.
CEC/EEE
Duen-Ren Liu, Chin-Hui Lai, Wang-Jung Lee
2007 C conf
Knowledge Flow-Based Document Recommendation for Knowledge Sharing.
KSEM
Chin-Hui Lai, Duen-Ren Liu
2007 J jnl
Knowledge support for problem-solving in a production process: A hybrid of knowledge discovery and case-based reasoning.
Expert Syst. Appl.
Duen-Ren Liu, Chih-Kun Ke
2007 C conf
Role and Task Based Authorization Management for Process-View.
SECRYPT
Mei-Yu Wu, Duen-Ren Liu
2007 J jnl
Rough set-based logics for multicriteria decision analysis.
Eur. J. Oper. Res.
Tuan-Fang Fan, Duen-Ren Liu, Gwo-Hshiung Tzeng
2006 J jnl
Arrow Decision Logic for Relational Information Systems.
Trans. Rough Sets
Tuan-Fang Fan, Duen-Ren Liu, Gwo-Hshiung Tzeng
2006 B conf
Granulation Based on Hybrid Infornation Systems.
SMC
Tuan-Fang Fan, Churn-Jung Liau, Duen-Ren Liu, Gwo-Hshiung Tzeng
2006 — conf
Mining and Supporting Task-Stage Knowledge: A Hierarchical Clustering Technique.
PAKM
Duen-Ren Liu, I-Chin Wu, Wei-Hsiao Chen
2005 — conf
Arrow Decision Logic.
RSFDGrC (1)
Tuan-Fang Fan, Duen-Ren Liu, Gwo-Hshiung Tzeng
2005 — conf
Hybrid Recommendation Approaches: Collaborative Filtering via Valuable Content Information.
HICSS
Ya-Yueh Shih, Duen-Ren Liu
2005 J jnl
Hybrid approaches to product recommendation based on customer lifetime value and purchase preferences.
J. Syst. Softw.
Duen-Ren Liu, Ya-Yueh Shih
2005 J jnl
Integrating AHP and data mining for product recommendation based on customer lifetime value.
Inf. Manag.
Duen-Ren Liu, Ya-Yueh Shih
2005 — ch.
Justification and Hypothesis Selection in Data Mining.
Foundations of Data Mining and knowledge Discovery
Tuan-Fang Fan, Duen-Ren Liu, Churn-Jung Liau
2005 J jnl
Task-based
Expert Syst. Appl.
Duen-Ren Liu, I-Chin Wu, Kuen-Shieh Yang
2005 Misc conf
Task-stage knowledge support: coupling user information needs with stage identification.
IRI
I-Chin Wu, Duen-Ren Liu, Wei-Hsiao Chen
2004 J jnl
An agent-based approach to flexible commerce in intermediary-centric electronic markets.
J. Netw. Comput. Appl.
Duen-Ren Liu, Tzyy-Feng Hwang
2004 J jnl
Business-to-business workflow interoperation based on process-views.
Decis. Support Syst.
Duen-Ren Liu, Minxin Shen
2004 J jnl
Discovering role-relevant process-views for disseminating process knowledge.
Expert Syst. Appl.
Minxin Shen, Duen-Ren Liu
2004 Misc conf
K-Support System: Knowledge Support for Disseminating and Sharing Task-relevant Knowledge.
IRI
I-Chin Wu, Duen-Ren Liu, Kuen-Shieh Yang
2004 — conf
Mining the Change of Events in Environmental Scanning for Decision Support.
ICEB
Meng-Jung Shih, Duen-Ren Liu, Churn-Jung Liau, Chin-Hui Lai
2004 J jnl
Project-based knowledge maps: combining project mining and XML-enabled topic maps.
Internet Res.
Duen-Ren Liu, Chouyin Hsu
2004 J jnl
Role-based authorizations for workflow systems in support of task-based separation of duty.
J. Syst. Softw.
Duen-Ren Liu, Mei-Yu Wu, Shu-Teng Lee
2003 — conf
A Collaborative Relevance Feedback Approach to Task-driven Recommendation.
PACIS
I-Chin Wu, Duen-Ren Liu
2003 — conf
Customer Defection Prediction in Online Bookstores.
ICEIS (2)
Ya-Yueh Shih, Kwoting Fang, Duen-Ren Liu
2003 J jnl
Designing a composite e-service platform with recommendation function.
Comput. Stand. Interfaces
Duen-Ren Liu, Minxin Shen, Chiu-Ting Liao
2003 C conf
Discovering Role-Relevant Process-Views for Recommending Workflow Information.
DEXA
Minxin Shen, Duen-Ren Liu
2003 J jnl
Integrating software agents with multi-level metadata in support of heterogeneous product search.
Comput. Syst. Sci. Eng.
Duen-Ren Liu, Shien-Chang Pan
2003 — conf
Multi-Criteria Task Assignment in Workflow Management Systems.
HICSS
Minxin Shen, Gwo-Hshiung Tzeng, Duen-Ren Liu
2003 J jnl
Workflow modeling for virtual processes: an order-preserving process-view approach.
Inf. Syst.
Duen-Ren Liu, Minxin Shen
2001 — conf
A Framework for Personalized E-Catalogs: An Integration of XML-based Metadata, User Models and Agents.
HICSS
Duen-Ren Liu, Yuh-Jaan Lin, Ya-Wen Huang, Chung-Min Chen
2001 J jnl
A Hypergraph Based Approach to Declustering Problems.
Distributed Parallel Databases
Duen-Ren Liu, Mei-Yu Wu
2001 J jnl
A Possibilistic Decision Logic with Applications.
Fundam. Informaticae
Churn-Jung Liau, Duen-Ren Liu
2001 C conf
Coordinating Interorganizational Workflows Based on Process-Views.
DEXA
Minxin Shen, Duen-Ren Liu
2001 J jnl
Deployment of personalized e-catalogues: An agent-based framework integrated with XML metadata and user models.
J. Netw. Comput. Appl.
Duen-Ren Liu, Yuh-Jaan Lin, Chung-Min Chen, Ya-Wen Huang
2001 J jnl
Integrating SET and EDI for secure healthcare commerce.
Comput. Stand. Interfaces
Duen-Ren Liu, I-Chin Wu, Sung-Ting Hsieh
2001 B conf
Modeling Workflows with a Process-View Approach.
DASFAA
Duen-Ren Liu, Minxin Shen
2000 J jnl
Classifying Video Documents by Hierarchical Structure of Video Contents.
Comput. J.
Duen-Ren Liu, Chen-Hsien Lin, Jing-Jang Hwang
2000 B conf
Tree Indexing for Efficient Search of Similar Documents.
COMPSAC
Chung-Min Chen, Duen-Ren Liu
1999 — conf
A Logical Approach to Fuzzy Data Analysis.
PKDD
Churn-Jung Liau, Duen-Ren Liu
1999 — conf
Applying Agents to Search Goods Information Based on Three-Level Metadata Architectures.
DEXA Workshop
Duen-Ren Liu, Shien-Chang Pan
1997 J jnl
CCAM: A Connectivity-Clustered Access Method for Networks and Network Computations.
IEEE Trans. Knowl. Data Eng.
Shashi Shekhar, Duen-Ren Liu
1997 J jnl
Data Models in Geographic Information Systems.
Commun. ACM
Shashi Shekhar, Mark Coyle, Brajesh Goyal, Duen-Ren Liu, Shyamsundar Sarkar
1996 J jnl
Genesis: An Approach to Data Dissemination in Advanced Traveler Information Systems.
IEEE Data Eng. Bull.
Shashi Shekhar, Andrew Fetterer, Duen-Ren Liu
1996 J jnl
Partitioning Similarity Graphs: A Framework for Declustering Problems.
Inf. Syst.
Duen-Ren Liu, Shashi Shekhar
1995 A* conf
A Similarity Graph-Based Approach to Declustering Problems and Its Application towards Paralleling Grid Files.
ICDE
Duen-Ren Liu, Shashi Shekhar
1995 A* conf
CCAM: A Connectivity-Clustered Access Method for Aggregate Queries on Transportation Networks: A Summary of Results.
ICDE
Shashi Shekhar, Duen-Ren Liu
1994 — conf
Genesis and Advanced Traveler Information Systems.
Mobidata
Shashi Shekhar, Duen-Ren Liu
1994 C conf
Testability Considerations.
ICCD
Shangzhi Sun, David Hung-Chang Du, Duen-Ren Liu