According to the theory of Fraunhofer diffraction,the MATLAB software is applied to proceed the emulation and the standard ellipsoid model of the different body factors is dissussed.

Using the proposed test methods,the specific surface area of coarse aggregates and the ratio of surface area shape factor to volume shape factor of coarse aggregates can be obtained,and the surface area fractal of coarse aggregates can be calculated by theoretical equations.

Automatically discriminating overlapped cell based on shape factor analysis:a technical study;

Research on relationship between shape factor and hydraulic conductance for flow in arbitrary triangular capillary;

Study of the thermal conductivities for the fluids and fluid mixtures with the shape factor corresponding states principle;

The process of extracting channels and valleys is transfered to the process of determining the physiognomy type according to terrain factors.

And based on it,terrain factors,needed for site condition in afforestation decision support system(ADSS),were automatically calculated by computer.

In forest management,the traditional method is observing terrain factors on the spot,this is an onerous task and can not accurately survey factors of large region In recently,automatic extracting terrain factors by digital elevation model(DEM)become a new trend going along with the development of information technology,this paper introduces the application of DEM in forest managemen

The influences and correction to wedge factor for linear accelerator;

Analysis of the effect of the wedge factor on the field bulk and radial depth;

Objective To study the relation between the field size and depth of Fw (wedge factor) and its effect on the clinical usage.