In the threshold PGG, the public good is produced when the number of Cooperators in a group of sizenmeets or exceeds a threshold\(\tau\), where\(1< \tau < n\)5,11,12. We defined the payoff structure with four parameters:WandYare the payoffs to cooperators and defectors, respectively...
The tree structure consisting of relational operators shows how SQL statements are executed in PolarDB-X 1.0. Different from other database systems, PolarDB-X 1.0 does not store data but focuses more on the network I/O in the distributed environment. PolarDB-X V1.0 improves the execution ...