The simulation results indicate that the performance of MIMO systems in the flat fading environment is primarily relied on correlation variation caused by the different displacements of the antennas and the different distributions of local scattering.

Aiming at solving those problems,this paper proposes a new method of dealing differently with "similar to" and "equal to" relations in grass-roots ontology alignment.

Measuring method to impulse neutron scattering background in complicated ambient condition;