Link LDA数据使用

[gaoliming123]

link LDA的数据格式是这样子的：

457720--578743--643697--840908--874627--975162--1058302--1275106--1368496--1769120--1769130--2135000	paper present indoor navigation range strategy monocular camera exploit architectural orthogonality indoor environment introduce method estimate range vehicle state monocular camera visionbased SLAM navigation strategy assume indoor indoorlike manmade environment layout previously unknown gpsdenied representable energy base feature point straight architectural line experimentally validate propose algorithm fully selfcontained microaerial vehicle mav sophisticated onboard image processing slam capability building enable small aerial vehicle fly tight corridor significant technological challenge absence gps signal limited sense option experimental result show systemis limit capability camera environmental entropy

想问一下前面的数字是什么意思？457720--578743--643697--840908--874627--975162--1058302--1275106--1368496--1769120--1769130--2135000