Research on optimization of temperature sensitive points of machine tool thermal error based on independent variable selection criteria

Abstract In order to improve the prediction accuracy and punked speed cruiser wheels robustness of the machine tool thermal error model, a method to select temperature sensitive points of the machine tool thermal error model based on independent variable selection criteria is proposed.Firstly, the positioning error of the machine tool is divided in

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Evolution of embryonic developmental period in the marine bird families Alcidae and Spheniscidae: roles for nutrition and predation?

Abstract Background Nutrition and predation have been considered two primary agents of selection important in the evolution of avian life history traits.The relative importance of these natural selective forces in the evolution of avian embryonic developmental period (EDP) remain poorly resolved, perhaps in part because research fruitia pink burst

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