I am a Ph.D. candidate in Zhejiang University, co-advised by Yang Yang and Jiangang Lu. I am visiting UCLA (working with Yizhou Sun) from Nov, 2019 to now.

My research interests include social network analysis and user modeling. More specifically, I am interested in network denoising in online social networks, and learning to reconstruct a clean network to improve its quality and representative power.

xujr {at} zju [dot] edu [dot] cn

Game bots are automated programs that assist cheating users and enable them to obtain huge superiority, leading to an imbalance in the game ecosystem and the collapse of user interest. Therefore, game bot detection becomes particularly important and urgent. Among many kinds of online games, massively multiplayer online role playing games (MMORPGs), such as World of Warcraft and AION, provide immersive gaming experience and attract many loyal fans. At the same time, however, game bots in MMORPGs have proliferated in volume and method, evolving with the real-world detection methods and showing strong diversity, leaving MMORPG bot detection efforts extremely difficult.

To deal with the fast-changing nature of game bots, we here proposed a generalized game bot detection framework for MMORPGs termed NGUARD, denoting NetEase Games’ Guard. NGUARD takes charge of automatically differentiating game bots from humans for MMORPGs. In detail, NGUARD exploits a combination of supervised and unsupervised methods. Supervised models are utilized to detect game bots in observed patterns according to the training data. Meanwhile, unsupervised solutions are employed to detect clustered game bots and help discovering new bots. The game bot detection framework NGUARD has been implemented and deployed in multiple MMORPG productions in the NetEase Game portfolio, achieving remarkable performance improvement and acceleration compared to traditional methods. Moreover, the framework reveals outstanding robustness for game bots in mutated patterns and even in completely new patterns on account of the design of the auto-iteration mechanism.


  • Jianrong Tao*, Jiarong Xu*, Linxia Gong, Yifu Li, Changjie Fan and Zhou Zhao (*: Equal Contribution). NGUARD: A Game Bot Detection Framework for NetEase MMORPGs. In Proceedings of the 24th ACM SIGKDD International Conference on Knowledge Discovery and Data Mining (KDD'18). [PDF]
  • Yiren Shen, Xiaoxian Ou, Jiarong Xu, Guanglin Zhang, Lin Wang and Dapeng Li. Optimal energy storage management for microgrids with ON/OFF co-generator: A two-time-scale approach. In Proceedings of the 3rd IEEE Conference on Signal and Information Processing (GlobalSIP'15). [PDF]
  • Chen Chen, Xueyuan Li, Ye Yang, Jiarong Xu, Zuwei Liao, Xinggao Liu and Jinshui Chen and Jiangang Lu. Parameter Self-Tuning of SISO Compact-Form Model-Free Adaptive Controller based on Neural Network with System Error Set as Input. In Proceedings of the 12th Asian Control Conference (ASCC'19). [PDF]
  • Ye Yang, Jinhou Han, Chen Chen, Jiarong Xu, Zuwei Liao, Xinggao Liu, Jinshui Chen and Jiangang Lu. A PSO-LP Cooperative Algorithm for Mixed Integer Nonlinear Programming. In Proceedings of the 12th Asian Control Conference (ASCC'19). [PDF]
  • Jiarong Xu, Chen Chen, Ye Yang and Jiangang Lu. Dynamic Modeling of Wax Hydrogenation Unit Based on LSTM-DNN Deep Learning. In Proceedings of the 29th Chinese Process Control Conference (CPCC'18).
  • Jiarong Xu and Cao Yu. A Particle Swarm Algorithm with Frog Leaping Behavior for designing optimal PID controller. In Proceedings of Chinese Process Automation Congress (CAC'15).
  • PC Members: CCKS 2018