建城 张

hi Riley， words can not express how  grateful i am to u。i try to optimize my model now and i hope the work will pay off. if u have any suggestions or improved guidence to my codes or my model.pleas...

hi Riley: So happy that u reply me soon. i had read the article u shown me above.but unfortnately,i had try the solving ways the article given and it didnt works. could u please give me some detail...