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Department of Mathematics and Information Technology

Prof. Yu Leung Ho Philip

Professor

Profile

Philip Yu is a Professor. He was the Chairperson of the Asian Region Section of the International Association of Statistical Computing, the Vice President of the Hong Kong Statistical Society, and a member of the Technical Committee of Computational Finance and Economics, IEEE Computational Intelligence Society. He is also an Associate Editor of Frontiers in Artificial Intelligence, Digital Finance, and Computational Statistics. Professor Yu obtained his Bachelor of Science degree in Mathematics (First class honor) and a PhD degree in Statistics from the University of Hong Kong.

His research interests are broad; they include AI and big data analytics, non-parametric inference, ranking methods, time series analysis, financial data analysis, risk management and statistical trading. He has a substantial volume of work on most of these topics, including two co-authored books on nonparametric statistics and more than 120 publications in conference proceedings and professional journals such as Biometrika, Journal of Royal Statistical Society Series A, Biometrics, Journal of Business and Economic Statistics, Journal of Statistical Software, Statistics and Computing, Expert Systems with Applications, and IEEE Transactions on Neural Networks and Learning Systems.

Professor Yu has been continuously engaged in performing outstanding teaching and mentoring activities, providing exceptional service to the statistics profession through numerous conferences and committee work, and promoting statistical literacy in Hong Kong through a number of outreach activities. He has been involved in the organizing and program committees in many international conferences. He was a member of Assessment Working Group of the Chief Executive’s Award for Teaching Excellence (2020/2021). He has many years of rich experience in various contract research/consulting projects for business, industry and public bodies including banks and insurance company, stock exchanges, hospital authority, etc.

Research Interests

  • Data Mining and Machine Learning. AI and Big Data Analytics. Text Analytics.
  • Preference Learning. Analysis of Discrete Choice and Ranking Data.
  • Statistical Methods in Finance. FinTech. Statistical Trading. Quantitative Risk Management.
  • Environmental Statistics. Ranked Set Sampling.
  • Statistical and AI Education.

Teaching Interests

Courses Taught on 2021-22:

  • MTH6184 Data Mining and STEM Education (MA(MP) & MSc(AI&EdTech) course, 2nd semester)

Selected Outputs

Chapter in an edited book (author)

  • 楊良河和陳昊 (2022)。 淺談總體比例的置信區間估算法。輯於課程發展組編, 《學校數學通訊》,第 25 期, (頁 106-115)。香港: 香港特別行政區政府教育局課程發展處數學教育組

Journal Publications (Publication in refereed journal)

  • Kuo, M. D., Chiu, K. W. H., Wang, D. S., Larici, A. R., Poplavskiy, D., Valentini, A., Napoli, A., Borghesi, A., Ligabue, G., Fang, X.H.B., Wong, H.K.C., Zhang, S., Hunter, J., Mousa, A., Infate, A., Elia, L., Golemi, S., Yu, P.L.H., Hui, C.K.M., & Erickson, B. J. (2023). Multi-center validation of an artificial intelligence system for detection of COVID-19 on chest radiographs in symptomatic patientsEuropean Radiology33, 23-33 Doi:10.1007/s00330-022-08969-z.
  • Wang, X., Yu, P.L.H., Yang, W. and Su, J. (2022). Bayesian robust tensor completion via CP decompositionPattern Recognition Letters163, 121-128.
  • Gu, J., & Yu, P.L.H. (2022). Joint Latent Space Models for Ranking Data and Social NetworkStatistics and Computing32, 1-15 Doi:https://doi.org/10.1007/s11222-022-10106-1.
  • Lu, R., & Yu, P.L.H. (2021). Buffered Vector Error-Correction Models: An Application to the U.S. Treasury Bond RatesStudies in Nonlinear Dynamics & Econometrics25(5), 267-287 Doi:https://doi.org/10.1515/snde-2019-0047.
  • You, J., Yu, P.L.H., Tsang, A.C.O., Tsui, E.L.H., Woo, P.P.S., Lui, C.S.M., Leung G.K.K., Mahboobani, N., Chu, C.-Y., Chong, W.-H., Poon, W.-L. (2021). 3D Dissimilar-Siamese-U-Net for Hyperdense Middle Cerebral Artery Sign SegmentationComputerized Medical Imaging and Graphics90 (June 2021), 101898
  • K.K.F. LAW, W.K. LI and Philip L.H. YU (2021). An Alternative Nonparametric Tail Risk MeasureQuantitative Finance 21(4), 685-696
  • Chiu, W. H. K., Vardhanabhuti, V., Poplavskiy, D., Yu, P. L. H., Du, R., Yap, A. Y. H., Zhang, S., Fong, A. H. T., Chin, T. W. Y., Lee, J. C. Y., Leung, S. T., Lo, C. S. Y., Lui, M. M. S., Fang, B. X. H., Ng, M. Y. and Kuo, M. D. (2020). Detection of COVID-19 Using Deep Learning Algorithms on Chest RadiographsJournal of Thoracic Imaging35(6), 369-376
  • Seto, W. K. W., Chiu, W. H. K., Yu, P. L. H., Cao, W., Cheng, H. M., Wong, E. M. F., Wu, J., Lui, G. C. S., Shen, X., Mak, L. Y., Li, W. K. and Yuen, R. M. F. (2020). An end-to-end artificial intelligence model accurately diagnosing hepatocellular carcinoma on computed tomographyUnited European Gastroenterology Journal8(8 suppl), 48-49
  • Seto, W., Chiu, K., Yu, P. L. H., Cao, W., Cheng, H. M., Lui, G., Wong, E. M. F., Wu, J., Mak, L. Y., Shen, X. P., Li, W. K. and Yuen, M. F. (2020). High diagnostic performance of a deep learning artificial intelligence model in accurately diagnosing hepatocellular carcinoma on computed tomography Hepatology72 (1 Suppl), 84-85
  • Yu, P. L. H., Ng, F. C., and Ting, J. K. W. (2020). Adjusting covariance matrix for risk managementQuantitative Finance20(10), 1681-1699
  • K.K.F. LAW, W.K. LI and Philip L.H. YU (2020). Evaluation Methods for Portfolio ManagementApplied Stochastic Models in Business and Industry36(5), 857-876
  • Lu, R., Yu, P. L. H., and Wang, X. (2020). Sparse vector error correction models with application to cointegration‐based tradingAustralian & New Zealand Journal of Statistics62(3), 297-321
  • K. LAW, W.K. LI and P. YU (2020). An Empirical Evaluation of Large Dynamic Covariance Models in Portfolio Value-at-Risk EstimationJournal of Risk Model Validation14(2), 21-39
  • Lu, R., and Yu, P. L. H. (2020). Smooth buffered autoregressive time series modelsJournal of Statistical Planning and Inference206, 196-210
  • You, J., Tsang, A. C. O., Yu, P. L. H., Tsui, E. L. H., Woo, P. P. S., Lui, C. S. M., and Leung, G. K. K. (2020). Automated hierarchy evaluation system of large vessel occlusion in acute ischemia strokeFrontiers in Neuroinformatics14, 14
  • Zhu, Y., Yu, P. L. H., and Mathew, T. (2020). Improved estimation of optimal portfolio with an application to the US stock marketJournal of Statistical Theory and Practice14(1), 25
  • Tsang, A. C. O., You, J., Li, L. F., Tsang, F. C. P., Woo, P. P. S., Tsui, E. L. H., Yu, P. L. H. and Leung, G. K. K. (2020). Burden of large vessel occlusion stroke and the service gap of thrombectomy: A population-based study using a territory-wide public hospital system registryInternational Journal of Stroke15(1), 69-74

Journal Publications (Publication in policy or professional journal)

  • Yu P. L. H. and Li, W. K. (2021). Project-based Learning via Competition for Data Science Students. Harvard Data Science Review, 3(1), 1-4

Conference Papers (Invited conference paper)

  • 楊良河 (2022,6). 人工智能驅動的看圖造句自動評分。論文發表於「EDTECH教育科技研討會2022:特殊教育科技的創新和發展」,香港

Conference Papers (Refereed conference paper)

  • Zhao, R., Zhuang, Y., Zou, D., Xie, Q., & Yu, P.L.H. (2022, 7). AI-driven Automated Language Assessment of Picture Writing Tasks. Paper presented at the 1st APSCE International Conference on Future Language Learning (ICFULL), Hong Kong
  • Gao, J., Xu, H., Shi, H., Ren, X., Yu, P.L.H., Liang, X., Jiang, X., & Li, Z. (2022, 6). AutoBERT-Zero: Evolving BERT Backbone from Scratch. Proceedings of the Thirty-Sixth AAAI Conference on Artificial Intelligence (AAAI-22), virtual Doi:https://doi.org/10.1609/aaai.v36i10.21311.
  • Gao, J., Zhou, Y., Yu, P.L.H., Joty, S., & Gu, J. (2022, 6). UNISON: Unpaired Cross-Lingual Image Captioning. Proceedings of the Thirty-Sixth AAAI Conference on Artificial Intelligence (AAAI-22), virtual Doi:https://doi.org/10.1609/aaai.v36i10.21310.
  •  Song, Y., Yu, P.L.H., Lee, J.C.K., Wu, K., & Cao, J. (2022, 6). Developing an Avatar Generation System for the Metaverse in Education. Paper presented at The 1st International Workshop on Metaverse and Artificial Companions in Education and Society (MetaACES 2022), Hong Kong https://www.eduhk.hk/metaaces2022/download/MetaACES%202022%20Program_20220622.pdf

Research Projects

An interactive avatar toolkit: Enhancing students’ online learning engagement in higher education

The project aims to develop and implement an interactive avatar (iAvatar) toolkit aligned with: (1) a framework of five dimensions of meaningful learning with technology, (2) the iAvatar toolkit design model, and (3) engagement to create a virtual interactive learning community.
Project Start Year: 2021, Principal Investigator(s): SONG, Yanjie 宋燕捷 (YU, Leung Ho Philip 楊良河 as Co-Principal Investigator)

Bayesian Robust Tensor Completion via CP Decomposition

The real-world tensor data are inevitable missing and corrupted with noise. We propose a robust Bayesian tensor completion method, called MoG BTC-CP, which could impute the missing data and remove the complex noise simultaneously.
Project Start Year: 2021, Principal Investigator(s): WANG, Xiaohang (YU, Leung Ho Philip 楊良河 as Co-Principal Investigator)

Research and Development of Artificial Intelligence in Educational and Financial Technologies

...
Project Start Year: 2021, Principal Investigator(s): YU, Leung Ho Philip 楊良河

Moving Average for Buffered Time Series Modelling

he buffered time series model is a new type of nonlinear time series models that have attracted some attention in the literature. However, nearly all buffered time series models are of the autoregressive type. The objective of this project is to extend the buffered time series to include the moving average specification.Project Start Year: 2021, Principal Investigator(s): LI, Wai Keung 李偉強 (YU, Leung Ho Philip 楊良河 as Co-Investigator)

Cross-lingual Image Captioning

...
Project Start Year: 2020, Principal Investigator(s): YU, Leung Ho Philip 楊良河

Modeling Ranking Data in Social Networks

Ranking of items arises in many situations in our daily lives. Very often, not all the items are ranked, resulting in a set of incomplete ranking data. A typical example of incomplete ranking data is movie recommendation where users in a social media platform rated a number of movies and some of these users may be friends of each other. As not all movies are rated by the same user, after converting ratings to rankings, such dataset becomes a set of incomplete rankings with friendship connections among the users in a social network. It is known that individual choice behaviors may be influenced strongly from their peers or friends on social media. So far, traditional ranking models do not account for such spatial or network dependence. This project aims at developing new probabilistic models for ranking data in a social network. As individuals’ rank-order preference behaviors are often correlated with those of their “friends”, it is anticipated that the new models should be able to capture such social network effects and make better inferences, for instance, predicting ranks of the unranked items, inferring the latent social positions, and identifying latent groups. They
can help us to have a better understanding of some sociological phenomena such as homophily as well as the social patterns of the individuals and items. First of all, we develop conditional models of ranking data for a given social network by extending the traditional ranking models to incorporate peer effects. Secondly, we will adopt a latent space approach to model both ranking data and social network jointly. Under this approach, individuals and items are represented by points in a latent space, and the distance between two individual points and the distances from an individual point to the item points will then determine the likelihood of a connection between the two individuals and the probability of observing a ranking given by the individual respectively. One can also develop joint models by combining a marginal model for ranking data (social network) and a conditional model of social network (ranking data).
Efficient estimation procedures of the new models will be developed. To provide a comprehensive study under various conditions, the proposed models will be applied to analyze a number of real-world datasets and semi-synthetic datasets. It is believed that the new models can provide both practical and theoretical contributions to the analysis of ranking data in a social network.
Project Start Year: 2020, Principal Investigator(s): YU, Leung Ho Philip 楊良河

Prof. Yu Leung Ho Philip

Prof. Yu Leung Ho Philip

Professor