摘要
1 Introduction and main contributions Identifying controllable number of data points from a large dataset to support multi-criteria decision-making is an important functionality of database systems,such as recommendation systems,search engines and information retrieval.In re-cent years,the k-rcgret query[1]has been studied.
基金
This work was partially supported by the Fundamental Research Funds for the Central Universities(NS2020068),the National Natural Science Foundation of China(U1733112,61702260).
