Research output per year
Research output per year
Personal profile
Author IDs
ORCID iD: 0000-0002-1556-1068
Scopus Author ID: 55823366100
Google Scholar Profile: kQrJtjYAAAAJ
Impact
Biography
Dr. Kai Liu joined City University of Hong Kong in March 2019 as an Assistant Professor in Animal Behaviour and Welfare and Precision Livestock Farming. He contributes to the Bachelor of Veterinary Medicine by teaching courses in the areas of animal behaviour and welfare, food production and security, and livestock husbandry. He also conducts research in the area of precision livestock farming, mostly in poultry and swine production systems.
Kai obtained his PhD degree in Agricultural and Biosystems Engineering (Animal Production Systems Engineering) from Iowa State University, USA, and then joined the Swine Teaching and Research Center at the University of Pennsylvania, School of Veterinary Medicine, USA, as a postdoctoral researcher. His research there mainly focused on engineering and machine learning techniques to monitor and assess behaviour, health, welfare, and reproductivity of sows kept in loose housing, both in large groups during gestation and with alternative farrowing systems.
Kai has been named as the 2019 Class “New Faces of ASABE – Professionals” by the American Society of Agricultural and Biological Engineers. As an agricultural and biological engineer working in animal agriculture, he is dedicated to applying engineering strategies and innovation, and to seeking data-driven solutions to address global challenges related to food animal production and sustainability, particularly the ever-growing issues related to animal welfare and behaviour.
Research Interests/Areas
Laboratory for SMART Animal Management
Precision Livestock Farming:
- engineering strategies/innovation for real-time monitoring, assessment, and management of farming animals regarding their behaviour, health, production, reproduction, and welfare
Animal Housing and Environment Management:
- alternative housing system design for farm animals
- behaviour and production responses of farm animals to housing enrichments
- novel lighting technologies for poultry production
Animal Behaviour and Welfare:
- alternative housing systems for improved behaviour and welfare of farm animals
Teaching
VM 2003 - Livestock Husbandry
VM 2002 - Animal Welfare
VM 2102 - Animal Behavior and Handling
GE 1351 - Food Production and Security
Services in CityUHK
CityU Health and Safety Committee - University Animal Work Protection Officer
CityU Animal Research Ethics Sub-Committee
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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Collaborations from the last five years
Recent external collaboration on country/territory level. Dive into details by clicking on the dots or
Research output
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Characterization of social cohesion status of pre-weaning piglets based on lightweight pose estimation
He, Z., Guo, C., Guo, Z., Lyu, L., Huang, E., Mao, A. & Liu, K., Feb 2025, In: Computers and Electronics in Agriculture. 229, 109716.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
1 Citation (Scopus) -
Non-invasive monitoring for precision sheep farming: Development, challenges, and future perspectives
Wang, Y., Wang, X., Liu, K., Cuan, K., Hua, Z., Li, K. & Wang, K., Apr 2025, In: Computers and Electronics in Agriculture. 231, 18 p., 110050.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
3 Citations (Scopus) -
Numerical evaluation on spray cooling to mitigate heat stress in cattle using computational fluid dynamics
Yang, R., Zhang, W., Choi, C. Y., Rong, L., Zhang, G., Liu, K. & Wang, X., Feb 2025, In: Computers and Electronics in Agriculture. 229, 109775.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
1 Citation (Scopus) -
Review: multi object tracking in livestock-from farm animal management to state-of-the-art methods
Nidhi, M. H., Liu, K. & Flay, K. J., May 2025, In: Animal. 19, 5, 101503.Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open AccessFile1 Citation (Scopus)7 Downloads (CityUHK Scholars) -
Transformer-Based Audio-Visual Multimodal Fusion for Fine-Grained Recognition of Individual Sow Nursing Behaviour
Yang, Y., Xu, C., Hou, W., McElligott, A. G., Liu, K. & Xue, Y., Sept 2025, In: Artificial Intelligence in Agriculture. 15, 3, p. 363-376Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Open AccessFile12 Downloads (CityUHK Scholars)
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TDG(CityU): Artificial Intelligence Tools for Aquatic Animal Disease Courses
ST-HILAIRE, S. N. (Principal Investigator / Project Coordinator), CAI, W. (Co-Investigator), LIU, K. (Co-Investigator) & MacKINNON, E. B. (Co-Investigator)
16/06/25 → …
Project: Research
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HKgovt: Provision of Service for Feral Pigeon Population Survey at Specific Areas in Hong Kong
LIU, K. (Principal Investigator / Project Coordinator)
5/08/24 → …
Project: Research
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SADF: State-of-the-Art Health Management for Improved Poultry Production, Product Safety and Quality in Hong Kong
PFEIFFER, D. U. (Principal Investigator / Project Coordinator), CONAN, A. Y. (Co-Investigator), FLAY, K. J. (Co-Investigator), GO, Y. Y. (Co-Investigator), KENEZ, A. (Co-Investigator), LIU, K. (Co-Investigator), NEKOUEI JAHROMI, O. A. (Co-Investigator) & PAUDEL, S. (Co-Investigator)
1/03/22 → …
Project: Research
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SADF: Introduction of Advanced Health Management Tools for Enhanced Pig Production, Product Safety and Quality in Hong Kong
PFEIFFER, D. U. (Principal Investigator / Project Coordinator), CONAN, A. Y. (Co-Investigator), FLAY, K. J. (Co-Investigator), GO, Y. Y. (Co-Investigator), KENEZ, A. (Co-Investigator), KENEZ, A. (Co-Investigator), LIU, K. (Co-Investigator) & MAGOURAS, I. (Co-Investigator)
1/03/22 → …
Project: Research
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ConRes-RO: Provision of Service on Evaluating the Performance of Oral Contraceptive Drug to Feral Pigeons
LIU, K. (Principal Investigator / Project Coordinator), FLAY, K. J. (Co-Investigator), McElligott, A. G. (Co-Investigator) & NEKOUEI JAHROMI, O. A. (Co-Investigator)
9/07/21 → …
Project: Research
Prizes
Press/Media
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Deep learning tool improves chicken welfare by identifying distress calls
MCELLIGOTT, A. G., MAO, A. & LIU, K.
8/07/22 → 20/07/22
18 items of Media coverage
Press/Media: Press / Media
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Computers and Electronics in Agriculture (Journal)
LIU, K. (Associate Editor)
1 May 2022Activity: Publication peer-review and editorial work (RGC: 61) › RGC 61 - Journal editor
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Smart Agriculture (Journal)
LIU, K. (Editorial Board Member)
2021 → …Activity: Publication peer-review and editorial work (RGC: 61) › RGC 61 - Journal editor
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International Journal of Agricultural and Biological Engineering (Journal)
LIU, K. (Editor)
2020 → …Activity: Publication peer-review and editorial work (RGC: 61) › Editorial membership and others
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Frontiers in Veterinary Science (Journal)
LIU, K. (Review Editor)
2020Activity: Publication peer-review and editorial work (RGC: 61) › RGC 61 - Journal editor
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Association of Overseas Chinese Agricultural, Biological, and Food Engineers. (External organisation)
LIU, K. (Member)
2018 → 2021Activity: Membership › Membership of board
Supervised Students
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Mr. Chuanyi GUO, 郭傳义
- Department of Infectious Diseases and Public Health - P/T Research Assistant
Person: P/T Research Assistant, Doctor of Philosophy (Student)
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Mr. Zhaojin GUO, 郭兆謹
- Department of Infectious Diseases and Public Health - P/T Research Assistant
Person: P/T Research Assistant, Doctor of Philosophy (Student)
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Mr. Zheng HE, 何錚
- Department of Infectious Diseases and Public Health - P/T Research Assistant
Person: P/T Research Assistant, Doctor of Philosophy (Student)
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Mr. Li LYU, 呂勵
- Jockey Club College of Veterinary Medicine and Life Sciences
- Department of Infectious Diseases and Public Health - P/T Research Assistant
Person: P/T Research Assistant, Doctor of Philosophy (Student)