A modified max-min ant colony optimization algorithm for virtual machines replacement in cloud datacenter§. - Tiantian Ren; Xinli Huang (IPCCC, 2014)

Anti-Radiation Performance Assessment of Satellite Units Based on the Weiner Process. - Zhongbao Zhou; Tiantian Ren; Feimin Zhong; Binghua Song; Shijian Wu (IEEE Access, 2018)

Performance evaluation of portfolios with fuzzy returns. - Zhongbao Zhou; Enming Chen; Helu Xiao; Tiantian Ren; Qianying Jin (RAIRO Oper. Res., 2019)

Estimation of fuzzy portfolio efficiency via an improved DEA approach. - Helu Xiao; Tiantian Ren; Teng Ren (INFOR Inf. Syst. Oper. Res., 2020)

Directional scale elasticity considering the management preference of decision-makers. - Tiantian Ren; Zhongbao Zhou; Ruiyang Li; Wenbin Liu (RAIRO Oper. Res., 2021)

Estimation of portfolio efficiency considering social responsibility: evidence from the multi-horizon diversification DEA. - Tiantian Ren; Zhongbao Zhou; Helu Xiao (RAIRO Oper. Res., 2021)

Digital Economy Research Based on Spatial Dupin Model Under Big Data Technology. - Tiantian Ren (ICATCI (1), 2022)

Measuring the dynamic efficiency of socially responsible investment funds: evidence from dynamic network DEA with diversification. - Helu Xiao; Xin Liu; Tiantian Ren; Zhongbao Zhou (INFOR Inf. Syst. Oper. Res., 2022)

Estimation of portfolio efficiency via stochastic DEA. - Helu Xiao; Xin Liu; Tiantian Ren; Zhongbao Zhou (RAIRO Oper. Res., 2022)

Two-Stage Portfolio Optimization Integrating Optimal Sharp Ratio Measure and Ensemble Learning. - Zhongbao Zhou; Zhengyang Song; Tiantian Ren; Lean Yu (IEEE Access, 2023)

Multi-source data driven cryptocurrency price movement prediction and portfolio optimization. - Zhongbao Zhou; Zhengyang Song; Helu Xiao; Tiantian Ren (Expert Syst. Appl., 2023)

Clinical value of grayscale ultrasound combined with real-time shear wave elastography nomogram in risk prediction of thyroid cancer. - Tiantian Ren; Mingfei Jiang; Jiawei Wu; Fan Zhang; Chaoxue Zhang (BMC Medical Imaging, 2023)

Risk-aversion versus risk-loving preferences in nonparametric frontier-based fund ratings: A buy-and-hold backtesting strategy. - Tiantian Ren; Kristiaan Kerstens; Saurav Kumar (Eur. J. Oper. Res., 2024)

Dynamics, regional heterogeneity and robustness of fiscal poverty alleviation efficiency in China: dynamic network DEA and Bootstrap resampling methods. - Tiantian Ren; Helu Xiao; Shanping Wang; Zhongbao Zhou (RAIRO Oper. Res., 2024)

Facility location and capacity planning for sampling and testing processes under demand uncertainty. - Zhongbao Zhou; Wenting Sun; Tiantian Ren; Ximei Zeng (Comput. Ind. Eng., 2025)

Efficiency analysis of funding resources for rural revitalization in China based on the concept of sustainable development: evidence from parallel DEA with shared inputs/outputs and Tobit models. - Helu Xiao; Qing Wang; Tiantian Ren; Zhongbao Zhou (Oper. Res., 2025)