Measurement and analysis of proppant sphericity and roundness;

By adopting the two parameters of sphericity and thickness-breadth ratio as the parameters of the characteristic sizes,studying the deposit ratio of the single particle size,and using MATLAB in digital processing,the math model is set up between the voidage and the shaping parameter of coarse aggregate.

The commonly methods to adopt in roundness and sphericity assessment always have the property of complicate computation or are out of specification in national standards.

Study on asphericity of large aperture square off-axis aspherics and applications;

Solution for Best Fitting Spherical Curvature Radius and Asphericity of Off Axis Aspherics;

Applications of steel ball division degree in double crank shaft jig;

New Algorithm and Program of Sphericity Error;

Aimed at the spheric face of smaller diameter and sphericity of a higher-precision,a new method called "pneumatic measurement" is used in the area of sphericity error measurement.

In the paper, the problem about sphericity error is reviewed firstly.

Calculation and analysis of the deviation between the wet bulb temperature and the adiabatic saturated temperature of wet air;

the effect of the three parameters: wet bulb temperature,supply water temperature,and relative humidity in standard for small glass fiber reinforced plastic cooling tower on the cooling efficiency of cooling tower.

The sphericity of HMX particles were identified and calculated,the average sphere factors of HMX particles are 0.

Measurement shows that sphericity and wind speed have certain influence on sand motion.

The effectiveness of classical sphericity and Krumbein sphericity was compared to discribe chip-shaped fossil fuel, and the influence of sphericity on fiuidization characteristics was studied.