Research on Hierarchical Feature-based Surface Matching;

In order to improve the security and speed of iris identification systems,an iris identification method based on gray surface matching is proposed.

This dissertation addresses a practical data processing method of free-form surface for the coordinate measuring machine (CMM), including fitting algorithm, probe radius compensation and surface matching .

Discussion on distribution curve of coal preparation management and its application;

Computer imitation on distribution curve modle of dry cleaning with air dense medium fluidized bed;

It is hard to evaluate correctly separation performance of gravity-based coal cleaning unit using characteristic parameters of special distribution curve.

Various methods of parallel moving for partition curve of gravity separation with different densities were discussed.

The equipment's separation density obtained by using partition curve method was 1.

Based on the results of the analysis, a mathematical model of the screen is established with piecewise function to describe completely the partition curve of the probability sizing.

Rapid 3D contour matching based on the Fourier transform;

Results show that the stability of soils relates closely to the shape of gradation curves and coefficient of ununiformity.

Also,the advantages and disadvantages of semi-logarithm coordinate,constant logarithm coordinate and exponential coordinate are compared,and the exponential coordinate is proved as the optimal form of the gradation curve.