Einstein cycle is a kind of single-pressure absorption refrigerator, using n-butane-ammonia-water as working fluids, driven by low grade heat source.

Bubble pump is the core driving component in the single-pressure absorption Einstein cycle refrigerator.

With the emergency of energy problem, Einstein cycle refrigerator driven by low grade energy attracted more and more attention.

Approximate solution of the cosmological model of Gdel type is obtained for the ideal matter source by solving Einstein field equation.

Approximate solution of the expanding cosmological model of Gdel type is obtained for the vacuum by solving Einstein field equation.

We characterize some important conditions for F to be pointwise projective toαand discuss the conditions that F is Einstein metric or F is of constant flag curvature under the assumption that F is point.

Attractive nonlinear Schrdinger equation and Bose-Einstein condensate in phase space;

Using the direct perturbation technique,a general unstable chaotic solution was obtained of the Bose-Einstein condensates trapped in one-dimensional tilted optical lattice potential.

This paper is concerned with a class of nonlinear Schrdinger equations with combined power nonlinearities under a harmonic potential,which describes the attractive Bose-Einstein condensate under a magnetic trap.