The laser_induced breakdown spectroscopy(LIBS) calibration curves of the Fe and Ni trace elements are also determined in buffer gases He,Ar,Air and in vacuum.

The calibration curves of Pb content were constructed with the spectrogram acquired in experiments.

The calibration curve method for LIBS quantitative analysis is introduced.

The paper explains the measuring principle and calculation procedure of already calibrated flow measuring devices, presents a new technique for extrapolating the calibration curve, derives the functional relationship between practically used discharge coefficients and Renold s number of generally used flow measuring devices liable for calibration.

In this study, the freezing and thawing characteristic curves of umber soil with different initial water content were measured by TDR and NMR methods, and the reliability of the calibration curves of TDR method was verifi.

According to the overall dynamic compliance C of curve of average load-relative displacement and the crack growth length, the path and velocity of crack growth is obtained by the calibration curve method.

Mathematical expression of calibration curves for measuring friction factor by ring upsetting;