Solar Energy Generating Systems ( SEGS ) has been the world record holder for largest solar thermal project since its completion in1990 .
自从1990年建成之后，加州南部的太阳能发电系统就一直是最大的太阳能热电工程。
This class of subgraphs , known as segs , was introduced by Reed in 1961 .
这类子图称为广义割集，它是由里德在1961年提出的。
segs