请高人逐行解释以下LINGO程序，特别是“sets”与“data”部分

sets:
[email=NDMU/@ole(]NDMU/@ole('D:\1\1.xls','DMU')/[/email];
[email=NInput/@ole(]NInput/@ole('D:\1\1.xls','NInput')/:InputWeight[/email];
[email=NOutput/@ole(]NOutput/@ole('D:\1\1.xls','NOutput')/:OutputWeight[/email];
DMUInput(NDMU,NInput):Input;
DMUOutput(NDMU,NOutput):Output;
endsets
data:
Input,Output=@ole('D:\1\1.xls');
@ole('D:\1\1.xls','InputWeight')=InputWeight;
@ole('D:\1\1.xls','OutputWeight')=OutputWeight;
t=?;
enddata
[email=max=@sum(NOutput(j):Output(t,j)*OutputWeight(j))+U]max=@sum(NOutput(j):Output(t,j)*OutputWeight(j))+U[/email];
U=U01-U02;
@for(NDMU(i):
@sum(NInput(j):Input(i,j)*InputWeight(j))-@sum(NOutput(j):Output(i,j)*OutputWeight(j))>=U;);
@sum(NInput(j):Input(t,j)*InputWeight(j))=1;