Study of speech enhancement algorithm based on MMSE-LSA under non-stationary environments;

In this paper,we study the weak recurrence for the Markov chains in stationary random environments,then a result of {X_n,T~n_(n≥0) is Markov bichain,a sufficient and necessary condition is given to conclude single chain X is weak recurrence in some condition.

Based on the thermal equilibrium theory and temperature distributing formula of semi-infinite region and numerical simulation method,the authors study the change regularity of the buried pipeline temperature field influenced by the unsteady environment temperature.

If the bba is constrained by the two key factors of stable environment and confidence measure,the confidence bba is formed.

Under the objective environment, for reasons of the possible instantaneous exception of the BBA (basic belief assignment) constructed from one-off sampling observation data, the objective confidence BBA was proposed, which was associated with the two elements, stable environment and confidence measure.