机译:Estimating photometric redshifts of quasars via the k-nearest neighbor approach based on large survey databases
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 100012 Beijing, China;
Department of Astronomy, Peking University, 100871 Beijing, China;
Catalogs; Galaxies: distances and redshifts; Methods: statistical; Quasars: general; Surveys; Techniques: photometric;