Abstract: A method for calculating the uncertainty of a data-based model, includes: a memory data generation step (S10); a measurement data receiving step (S20); a Euclidean distance calculation step (S30); a kernel function calculation step (S40); a weighted area-specific effective number calculation step (S50) of calculating a weighted area-specific effective number (Nn); a weighted value setting step (S60) of setting a weighted area-specific weighted value (Wn); a total effective number calculation step (S70) of calculating a total effective number (Nt) according to a weighted value; a prediction data calculation step (S80) of calculating prediction data (Xq) about measurement data (Q); a weighted standard deviation calculation step (S90) of calculating a weighted standard deviation (Sw); and an uncertainty calculation step (S100) of calculating uncertainty (U) so as to determine the reliability of prediction data by means of the calculated uncertainty (U).

Abstract: Disclosed are a pilot operated safety and relief valve (POSRV) performance evaluation test apparatus, which can test performance evaluation of a POSRV in a structurally stable state, and cope with various sizes of a lift cylinder or a spring-loaded pilot valve, and a control system of the POSRV performance evaluation test apparatus, which can prevent an inside of the lift cylinder from being suddenly pressed and thus damaged and at the same time more precisely evaluate the performance of the POSRV.