The influences of the main parameters on population inversion including initial population of the ground state, statistical weights ratio of the lower and upper laser levels, ratio of the three body recombination cascade speed and the spontaneons radiative decay speed are calculated and studied by using numerical calculations.

In this article, taking the capacitor phase-splitting single-phase motor for example, the reversion method of single-phase asynchronous electromtor was introduced.

And then the fuzzy neural network was inversed and fuzzified inversion algorithm was proposed.

The density matrix calculation provides the conditions for probe amplification from different origin, including gain without population inversion in any state basis, gain with population inversion in the dressed-state basis, and gain with population inversion in the bare-state basis.

Characters of reverse tectonics and its forming mechanism in late of fault depression in Songliao basin.;

Study the performance of AZ5214E image-reversal photoresist and its uses in lift-off technics;

The image-reversal technology using AZ5214E photoresist was studied in detail.

Momentum and Reversal in China Stock Market;

The returns of the groups show the characteristics of reversal with lower institutional investor holding and the momentum with higher institutional investor holding respectively.