It was validated that the consistency degree of crushing energy with various crushing theories, and then a mathematics model calculating specific crushing energy and Protodyakonov coefficient of outbursts-proneness coal was built.

Obtained the following results by the experiment and research the parameters relation between the water content and protodyakonov coefficient of coal sample as well as the parameters of dried coal sample are lower than original dried coal;showed the protodyakonov coefficient are increasing as that of strikes frequency.

To study the relationship between the power and energy of rock crushing in underground engineering disasters,such as rock outbursts,experiments were done on the crushing and the Protodyakonov coefficient of different rocks,the selective grinding processes classified according to particle size,and the uniaxial compressive strength.

Analysis of city resource-environment Gini coefficient in Guangdong Province;

Analysis of China resource-environment Gini coefficient based on GDP.;

The evolvement of carrying capacity of water source in karst regions based on Gini coefficient and gray analysis;

Selection methods on damping coefficient,stiffness coefficient and time step in granular distinct element method;

Test research on roll damping coefficient of anti-rolling tank testing platform;

Comment on empirical formulas for calculating marine engine damping coefficient;

Influences of Bubbly Oil on the Damping Factors of Journal Bearing;

When well fluids are laminar or turbulent,the damping factor of the different eccentric rod string was calculated respectively.

The transfer function F(s) of the second-order type-2 loop filter is given,the stability and step response of the third-order PLL then presented,followed by a derivation of a proper damping factor.

An analysis and calculation of damp coefficient in the cutting chatter;

Through simulation blade\'s damp trial in air,various order vibration model attenuation coefficients have been achieved by the method of free vibration attenuation,then various order vibration model damp ratios were obtained,and the ratio damp coefficients were deduced.