Zhengyi Chai is a professor at school of computer science and software engineering in Tianjin polytechnic university, Tianjin, China.
Zhengyi Chai was born in June 23, 1976. He received his BS degree in computer science from Jilin University, Changchun, China, in 1998. He earned his MS degree in computer software and theory from Zhengzhou University, Zhengzhou, China, in 2006. He got his Ph.D. degree at the school of computer science and technology, Xidian University, Xi’an, China. He engaged his postdoctoral research at state key laboratory of mobile communication, Southeast University, Nanjing, China, form August,2012 to December,2014. From November 2016 to November 2017, he was a visiting scholar in University of Nottingham, UK.
2.Research direction and academic achievements
His research interests include internet of things(IoTs), big data processing, artificial intelligence optimization and network anomaly detection.
He has completed some research projects and published some papers.
Some publications of the first author in recent 5 years are as follows. They are all indexed by SCI or EI.
 Chai Zheng-Yi,Yan Xue-yang，Li Ya-lun,，Zhu Si-Feng，Throughput optimization in cognitive wireless network based on clone selection algorithm，Computers and Electrical Engineering，2016，42（6）：1-9.
 Chai Zheng-Yi ,Li Ya-lun,Zhu Si-Feng. Parameters Optimization of Cognitive Network Based on Artificial Physics Multi-Objective Algorithm，Acta Electronica Sinica，2015，43（4）：1-5.
 Chai Zheng-Yi ,Li Ya-lun，Artificial Physics based spectrum allocation in cognitive wireless network，Acta Physica Sinica，2014，（22）：437-442.
 Chai Zheng-Yi ，Zhu Si-Feng，Shen Lian-Feng，Rate adaptive resource allocation in orthogonal frequency division multiple access system using multi-objective immune algorithm，International Journal of Communication Systems，2014，27（11）：3255-3265.
 Chai, Zheng-yi ，Liu, Fang，Qi, Yu-tao，Zhu, Si-feng，On the use of immune clonal optimization for joint subcarrier and power allocation in OFDMA with proportional fairness rate，International Journal of Communication Systems，2013，26（10）：1273-1287.
 Chai zheng-yi,liu fang. A Novel Immune Optimization Algorithm for Fairness Resource Allocation in Cognitive Wireless Network[J]. Wireless personal communications.,2013,69(4):1671-1687(SCI、EI).
 Chai zheng-yi,Zhang de-xian,Zhu si-feng. Resource allocation with proportional rate in cognitive radio network: An immune clonal optimization scheme [J].KSII Transactions on Internet and Information Systems, 2012,6(5): 1286-1302. (SCI、 EI).
 Chai zheng-yi,Zhang de-xian,Zhu si-feng. Rate adaptive resource allocation in OFDMA system using multi-objective immune algorithm[J].International Journal of Communication Systems 2012,6(5):1286-1302.(SCI、EI).
 Chai zheng-yi,liu fang. Chaos immune multi-objective algorithm for decision parameters optimization of cognitive engine [J]Acta Physica Sinica, 2012, 61(5): 026421.(SCI)
 Chai zheng-yi,liu fang. Chaos quantum clonal algorithm for decision engine of cognitive wireless network[J] Acta Physica Sinica,2012,61(2):028801 (SCI)
 Chai zheng-yi,liu fang. Resource allocation based on immune optimization in cognitive radio network [J]Acta Physica Sinica,2012,61(11):118801. (SCI)
 Chai zheng-yi,liu fang. Real-value negative selection algorithm for anomaly detection [J]Journal of Jilin University(Engineering and Technology Edition), 2012，42 (01): 176-181. (EI)
 Chai zheng-yi,liu fang. An immune real detector generation algorithm for immune anomaly detection [J]Journal of Jilin University(Engineering and Technology Edition), 2012,42 (05): 1251-1256 (EI)
 Chai zheng-yi,liu fang. Chaos quantum clonal algorithm for spectrum allocation of cognitive wireless network[J] Acta Physica Sinica,2011,60(6):068803.(SCI)
 Chai zheng-yi,liu fang. Spectrum allocation of cognitive wireless network based on immune clone selection optimization[J]Journal on Communications,2 010,31(11):92-100.(EI)
 Chai zheng-yi,liu fang. A Perception Model for Network Risk Using Danger-Theory[J]Journal of Beijing University of Posts and Telecommunications, 2010，33（3）：40-43. (EI)
 Chai zheng-yi,liu fang. Novel intelligent model for intrusion prevention[J] Journal of Huazhong University of Science and Technology(Natural Science Edition), 2010，38（1）：22-24. (EI)
He also published his own Academic monographs.
 Zhengyi Chai. Computer immune system and its application, science press, China,2016.
He got serval software copyright.
 immune negative selection based network anomaly detection, No. 0964301, China,2015.
 cognitive radio network resource allocation system, No. 1046221, China, 2015.
 cloud-based big data processing system, No. 1046448, China, 2015.
 network personalized recommendation system based on machine learning, No. 1046218, China,2015.
 large data mining-based network anomaly detection, No. 0964301, China, 2015.
3.Teaching and achievements
Reconstructing the Master Students' Training System of Computer Subjects under Classification Education，2016-10.
Compilation of teaching materials:
internet of things(IoTs), big data processing, artificial intelligence optimization and network anomaly detection.