The results indicate that the density increase rate of moderate earthquakes can reflect abnormal feature of mid-term stage before strong earthquakes.

By using the rate of total entropy increase and K/Δp integrated performance,the rate of total entropy increase calculation and performance contrasts were made between flower baffle heat exchanger and single segmental baffle heat exchanger.

Using entropy density of the rectilinearly accelerating non-stationary black hole with electric charges, the instantaneous radiant exitance is calculated,and a conclusion that the instantaneous radiant exitance of blank hole in a direction at any time is always proportional to quartic power of temperature of the event horizon of black hole on this direction is abtained.

Using the entropy density of the rectilinearly accelerating non-stationary black hole with electric charges and magnetic charges, a conclusion that the entropy density near the event horizon of non-stationary blank hole in a direction is always proportional to cubic power of temperature of event horizon on this direction is obtained.

The equilibrium equation of entropy and the specific expressions of entropy density,entropy current density,general force and general force density are derived for the first time.

MOPSO algorithm based on density entropy;

The concept of density entropy and how to optimize the parameter of Gaussian function are the emphases.