The thermal error of the motorized spindle is an essential factor affecting machining accuracy high-speed numerically controlled machines. establishment a model for compensation can effectively improve impact errors on machine tool. This paper proposes sparrow search algorithm to optimize Elman neural network predict in spindles. First simulation analysis characteristics A02 spindle. Based resu...

The objective of this study was to assess the reliability and bias estimated breeding values (EBV) from traditional BLUP with unknown parent groups (UPG), genomic EBV (GEBV) single-step (ssGBLUP) UPG for pedigree relationship matrix (A) only (SS_UPG), GEBV ssGBLUP both A among genotyped animals (A22; SS_UPG2) using 6 large phenotype-pedigree truncated Holstein data sets. complete included 80 mi...