The abbreviation ALU is not used in the paper. Do you mean “AUC”? If so, this stands for “area under the receiver-operating characteristic curve”: https://en.wikipedia.org/wiki/Receiver_operating_characteristic
The abbreviation ALU is not used in the paper. Do you mean “AUC”? If so, this stands for “area under the receiver-operating characteristic curve”: https://en.wikipedia.org/wiki/Receiver_operating_characteristic