As standard candles, RR Lyrae stars are taken as distance markers and age indicators, which is helpful to estimate the distance and age of globular clusters as well as galactic and extragalactic (Local Group) locations. At the same time, as tracers, they reveal the structure, chemical and dynamic evolution of the galaxy, as well as the substructure of the halo. However, the number of RR stars is very small compared with other types of stars in nature. With the development and operation of large-scale sky survey projects, they have made a qualitative leap in number. Compared with other types of stars, RR Lyrae stars are still not enough in number. Therefore, separating RR Lyrae stars from stars belongs to an imbalanced learning problem. It may be solved by popular imbalanced learning methods.

作为标准蜡烛，RR天琴星被用作距离标记和年龄指示符，这有助于估计球状星团的距离和年龄以及银河和银河外（本地群）的位置。同时，作为示踪剂，它们揭示了星系的结构，化学和动态演化以及光环的子结构。但是，与自然界中的其他类型的恒星相比，RR恒星的数量非常少。随着大型天象测量项目的开发和运营，它们的数量有了质的飞跃。与其他类型的恒星相比，RR Lyrae恒星的数量仍然不够。因此，将RR Lyrae的恒星与恒星分开属于一个不平衡的学习问题。这可以通过流行的不平衡学习方法来解决。