Using reverse martingale approach,we extend the results of arrays of row-column exchangeable random variables to exchangeable random variables,and discuss the convergence on bivariate weighted sums of triangular arrays of row-wise exchangeable random variables,and obtain some conclusions of the convergence on bivariate weighted sum of triangular arrays of row-wise exchangeable random variables.

The Tibet-III air shower array,carried out at Yangbajing,Tibet,is studied using Monte Carlo simulation.

Since the sea echo is one dimensional signal,this paper,based on an arbitrary triangular array,presents that space-time DOA matrix method,which is originally used to estimate two-dimensional angles of arrival under ideal conditions,can be reshaped to be used under amplitude and phase errors.