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 entropy density near event horizon of the Vaidya-Bonner black hole,the instantaneous radiant exitance is calculated,and a conclusion that the instantaneous radiant exitance of black hole at any time is always proportional to quartic power of temperature of the event horizon of black hole is abtained.

Using entropy density near event horizon of the accelerating non-stationary black hole, the instantaneous radiant emittance is calculated, and we arrive at the conclusion that the instantaneous radiant emittance of black hole in a direction at any time is always proportional to the quartic power of temperature of the event horizon of black hole in that direction.

Using entropy density near event horizon of the Vaidya-Bonner-de Sitter black hole,the instantaneous radiant emittance is calculated out,and a conclusion that the instantaneous radiant emittance of black hole at any time is always proportional to quartic power of temperature of the event horizon of black hole is obtained.

Selecting the advanced Eddington coordinates, and adopting the statistical method, the instantaneous radiant emittance of non-static black hole is calculated out.

A countermeasure is taken to provide a short time delay element with the instantaneous output circuit of failure protection against the mal-operation caused by mismatch between a 220 kV microprocessor based line protection and type PSDL-S electromagnetic breaker failure protection after testing and theoretical analysis.