One paper accepted by IJCAI 2019:

Pei Yang, Qi Tan, Jieping Ye, Hanghang Tong, Jingrui He. Deep Multi-Task Learning with Adversarial-and-Cooperative Nets. In: 2019 International Joint Conference on Artificial Intelligence (IJCAI 2019), acceptance rate: 850/4752=17.9%.

More details are available in:

http://www.edingxi.cn/portalPaperInfo.html?paperID=40003&Entry=yangpei