It is recognized widely nowadays that the superconducting gravimeter (SG) is a kind of best relative gravimeter with high observing precision, good continuity and stability. However, it is necessary to calibrate the direct output (change in voltage) by using scale value (calibration factor) before getting the change of the real gravity field.

The structure and measurement principle of a heat-loss-compensated aluminiumabsorbed dose calorimeter are described. Electrical calibration factors of thecalorimeter in the working temperature range from 10 to 35℃ are given. Thedistribution of dose rate to the distance in a 6oCo irradiation room is obtained.

Studies show that the accuracy of the scale value will influence the late analysis and explanation of the observations. By using absolute gravity measurements of a FG5 absolute gravimeter (AG) at Wuhan international tidal gravity fundamental station (two campaigns each for 3 days) and by using known tidal parameters at the same station, the calibration factors of the SG and their precision are studied in detail in this paper.

The nonlinearity correction algorithm, nonorthogonality correction algorithm and SPM calibration algorithm were successfully used in AJ-III AFM which was manufactured in the Shanghai Aijian Nanometer Sci. & Tech.

When the scae calibration and the zero drift correCtion of the LCR graVimeter arestUdie4 according to the exPression of the scale function of LCR gravimetef, thewriter firS anayses the value of the whuence of the scale forrs on the errorsystematically, then discusses the selection method of the scale fastor and thendiscusses the non-linear problem of the zero drift and brings forward a computingmethod of funCtion fitting.

between main shock and small shock are considered. An empirical spectrum scaling factor K(ω) is introduced when far-field shear wave spectrum of Brune model is used to modify small earthquake records.

It is shown that the synthesized motions show a good agreement with the observed ones in the frequency range from 0.3-15Hz, and K(ω) can be adjusted to make the response spectra of synthesized acceleration agree well with the observed ones.

The Effects of Focus-Skin Distance and Shaping Block Tray on the Calibration Factor of In-Vivo Dosimetry Diodes

Since there is no necessity to calculate a calibration factor, a large number of analyses can be done on the same TLC-plate.

By collecting and evaluating calibration factor ratios for a longer time, the time necessary for calibration could be reduced remarkably while maintaining or even improving the accuracy.

Accurate determination of calibration factor for tidal gravity observation of a GWR-superconducting gravimeter

However, it is necessary to calibrate the direct output (change in voltage) by using scale value (calibration factor) before getting the change of the real gravity field.

It is shown here as under certain conditions the calibration factors of the pure components could be determined even with impure standard substances.

Thus, a single determination of the quantitative calibration factors is adequate to calculate the concentrations of the individual components in less than 10 min with a standard deviation of ±1.5%.

A simple method is described for the elimination of the systematic errors in petrol analyses carried out with other instruments than those employed for the calibration factors.

Calibration factors are calculated within the tested range of weight of 1μg up to 100 μg/2 ml.

Diffusion coefficients in liquids by HPLC and the respective calibration factors

A quantitative gas chromatographic method using air as relative standard is proposed. In order to use this method, it is necessary to introduce a new concept of air calibration factor, Q_i(c). If the chromatographic operations are carried out in the range of linearity of detector response, the concentration of any component i in the sample isC_i=Q_i(c)·A_i/A_α (1) Where A_i is the peak area of the analysed component i, and A_α, that of the air which is used for calibration and chromatographed under identical...

A quantitative gas chromatographic method using air as relative standard is proposed. In order to use this method, it is necessary to introduce a new concept of air calibration factor, Q_i(c). If the chromatographic operations are carried out in the range of linearity of detector response, the concentration of any component i in the sample isC_i=Q_i(c)·A_i/A_α (1) Where A_i is the peak area of the analysed component i, and A_α, that of the air which is used for calibration and chromatographed under identical conditions.The concept of air calibration factor is based on the theory of relative sensitivity, and this factor Q_i (c) can be estimated by the equationQ_i(c)=sum from j=1 to 3 (c_j·RMR_(ji)) (2) Where c_j is the concentration of the component j in the pure dry air injected, represents N_2, O_2 or Ar, denoted by 1, 2, and 3, respectively and RMR_(ji) is the relative molar response of j to i. RMR_(ji) for katharometer is calculated from Novák's theoretical relationship.Our experiments show that air calibration factors determined according to equation (2) are accurate enough for the quantitative analysis by katharometer gas chromatography.

The spatial variability of soil properties is an important consideration for application of soil amendments and maximization of crop productivity. This Paper deals with the spatial variability of saturated hydraulic conductivity of soils,the relative analysis between the value of pore characterization and saturated hydraulic conductivity, and the spatial variability of saturated hydraulic conductivity to be characterized by macroporosity The results showed that the semivariogram of saturated hydraulic conductivity...

The spatial variability of soil properties is an important consideration for application of soil amendments and maximization of crop productivity. This Paper deals with the spatial variability of saturated hydraulic conductivity of soils,the relative analysis between the value of pore characterization and saturated hydraulic conductivity, and the spatial variability of saturated hydraulic conductivity to be characterized by macroporosity The results showed that the semivariogram of saturated hydraulic conductivity of soils expressed the spatial structure of this soil property; saturated hydraulic conductivity of soils can be characterized by macroporosity, the relations between saturated hydraulic conductivity and macroporosity may be expressed by the equations of linear function and power function; the distribution of macroporosity is used to derive and characterize frequency distribution of scaling factors of saturated hydraulic conductivity, as a spatial distribution measurement of saturated hydraulic conductivity

Based on the analysis of the hydraulic properties of unsaturated soil water, a scaling solution of infiltration is presented in this paper. It may be easily transformed to the particular solution for a certain site if the scaling factor is known. 37 infiltration tests have been carried out in Sh-angqiu and Chiping, and the data of each test were used to determine S and A in the Philip's equation I = St1/2+ At. Owing to large variability of the parameters S and A, the infiltration data have been scaled according...

Based on the analysis of the hydraulic properties of unsaturated soil water, a scaling solution of infiltration is presented in this paper. It may be easily transformed to the particular solution for a certain site if the scaling factor is known. 37 infiltration tests have been carried out in Sh-angqiu and Chiping, and the data of each test were used to determine S and A in the Philip's equation I = St1/2+ At. Owing to large variability of the parameters S and A, the infiltration data have been scaled according to the concept of similar media. Several methods for determining the scaling factors have been discussed and the frequency distribution of scaling factors in the present tests is log-normal. As an example,the Monte Carlo technique has been used to simulate spatial variability of infiltraion in Shangqiu.