Linear combination forecast based on relative error criterion;

The model is used to analyze the relative error of forecast and to forecast the exploitable geological ore reserves of Miaogou Mine in 2007.

The calculation methods of pH and relative error were studied in different acid-base solution.

By comparison with the results of ideal Henon sequence mixed with noise,the improved Farmer algorithm is able to increase the precision of noise attenuation and reduce the absolute error between itself and ideal Henon sequ.

According to original laser measure error and error analysis transfer expressions,calculations about absolute errors and relative errors of the measuring deformation of wing were performed.

It may measure the frequency and phase of the signal which begin from 10 Hz to 20 kHz,absolute error isn′t more than 1°.

Based on the analysis of the influence of actual distribution of manufacturing deviation and fit-up gap on tool clamping error of driller clamping fixture, the analytic method about the tool clamping error is put forward.

The Hazard and It's Correcting Methods of Alignment Error between Tool-tip and Spindle Center of NC Lathe;

Observability and alignment error analysis for rapid transfer alignment of inertial navigation system;

Analysis of system servo following error caused by alignment error of ESG;

It pointed out the errors formed by the two randomness and illustrated the faults of the four parameters system which is used in describing the shaft alignment error of a coupling by abroad technician.