Guangchi Liu 劉光遲, Ph.D.
Professor, Ph.D. Advisor 教授，博士生導師
School of Computer Science and Engineering
Southeast University, Nanjing, China
Office: 160, Computer Building, Jiulonghu Campus
E-mail: gc-liu[at]seu[dot]edu[dot]cn
Bio
My name is Guangchi (Luke) Liu and I am currently a professor of computer science at Southeast Univesity. I received my B.S. and M.S. degree from Southeast Univesity and Ph.D. in in Compuer Science from Montana State University, U.S.A under the supervision of Dr. Qing Yang. My research interests lie in the areas of Social Computing and Security, Trust Network, Machine Learning and Natural Language Processing, etc.
I used to be an industry research lead in the U.S. for 5 years. Under my supervision, my team prototyped and productionized numerious social media and opinion analysis systems, which have been used by more than 100 companies around the world. More details can be found at my personal webiste https://gc-liu.github.io/ .
Research Interests
Social Computing and Security, Trust Network, Natrual Language Processing, Machine Learning and Internet of Things.
Open Positions
I'm actively looking for strongly self-motivated undergraduate, master, and Ph.D. researchers. Please send me your CV if you are interested in joining us! All of the team members I have mentored are currently working at well-known tech/financial companies including Google, Meta, Amazon, Microsoft, Anasys, JP Morgan, Deloitte, etc. or pursuing Ph.D. degree at colleges including North Carolina State Univ., Fudan Univ., etc.
長期招募有強烈自我驅動意願的本科，碩士以及博士生同學加入我的團隊，請有興趣的同學請将簡曆發送至我郵箱:
gc-liu[at]seu[dot]edu[dot]cn
我指導過的前團隊成員均就職于谷歌，臉書，亞馬遜，微軟，摩根大通，德勤等IT/金融公司算法崗或在NCSU, 複旦等高校攻讀博士學位。詳細信息見 https://gc-liu.github.io/joinus/
目前我們團隊有少量專屬博士名額（綠色通道，可保證錄取），歡迎有讀博（直博，貫通，碩博連讀，考核博士）意向的同學聯系我。
Selected Publications
[1] Guangchi Liu, Qing Yang, Honggang Wang and Alex X. Liu, “Three-Valued Subjective Logic: A Model for Trust Assessment in Online Social Networks”. IEEE Transactions on Dependable and Secure Computing (TDSC) (2021).
[2] Guangchi Liu, Chenyu Li and Qing Yang, “NeuralWalk: Assessing Trust in Online Social Networks with Neural Network” in IEEE International Conference on Computer Communications (INFOCOM) 2019.
[3] Guangchi Liu, Qi Chen, Qing Yang, Binhai Zhu, Honggang Wang and Wei Wang. “OpinionWalk: An Efficient Algorithm for Massive Trust Assessment in Online Social Networks” in IEEE International Conference on Computer Communications (INFOCOM) 2017.
[4] Guangchi Liu, Qing Yang, Honggang Wang, Xiaodong Lin, and Mike P. Wittie. “Assessment of Multi-Hop Interpersonal Trust in Social Networks by Three-Valued Subjective Logic” in IEEE International Conference on Computer Communications (INFOCOM) 2014.
[5] Guangchi Liu, Qing Yang, Honggang Wang, Shaoen Wu, and Mike P. Wittie. “Uncovering the Mystery of Trust in An Online Social Network ” in IEEE Conference on Communications and Network Security (CNS) 2015.
[6] Tong Cheng, Guangchi Liu and Qing Yang, “Trust Assessment in Vehicular Social Network based on Three- Valued Subjective Logic”. IEEE Transactions on Multimedia (TMM) (2019).
[7] Xiaofei Niu, Guangchi Liu, and Qing Yang. “Trustworthy Website Detection Based on Social Hyperlink Network Analysis.” IEEE Transactions on Network Science and Engineering (TNSE) (2018).
[9] Xiaofei Niu, Guangchi Liu and Qing Yang, “OpinionRank: Trustworthy Website Detection using Three Valued Subjective Logic”. IEEE Transactions on Big Data (TBD) (2020).
[8] Mehdi Assefi, Ehsun Behravesh, Guangchi Liu and Ahmad Pahlavan Tafti. “Big Data Machine Learning using Apache Spark MLlib” in IEEE BigData (2017).
[9] Qi Chen, Ye Liu, Guangchi Liu, Qing Yang, Xianming Shi, Hongwei Gao, Lu Su and Quanlong Li. “Harvest Energy from the Water: A Self-Sustained Wireless Water Quality Sensing System” in ACM Transactions on Embedded Computing Systems (TECS) (2017).
[10] Ye Liu, Qi Chen, Guangchi Liu and Qing Yang. “EcoSense: A Hardware Approach to On-Demand Sensing in the Internet of Things” in IEEE Communication Magazine (2016).
Selected Projects
Project I: Dissemination of Multimodal Information in Directed Graph
Keywords: Graph Machine Learning, Graph Signal Processing, White-box Neural Network
Based upon the latest graph machine learning and interpretable machine learning approaches, this research aims to design a data-driven yet interpretable framework towards modeling multimodal information dissemination in network scenarios. Applications of this research include opinion dissemination modeling, trust network data verification, etc.
Project II: Trust Modeling in Network Scenarios
Keywords: Evidence Theory, Trust Network, Graph Theory, Neural Netwrok
This research contains a series of approaches for modeling trust relations in network scenarios accurately, efficiently and practically. Applications of this research include online disinformation analysis, troll account detection, and trust assessment for network traffic, etc.
Project III: Social Media Analysis
Keywords: Topic Modeling, Extreme Large Multlabel Classification, Sentiment Analysis
In this research, we employ NLP and machine learning approaches to develop a series of opinion analysis systems that provide business insights from social media data in an automatic, timely and interpretable manner. This research encompasses my work as the industry lead.
