 This design removes the noisy word-position correlation and gives more expressiveness to characterize the relationship between words/positions by using different projection matrices.
<clarity>  This design removes the noisy word-position correlation and gives more expressiveness to characterize the relationship between words/positions by using different projection matrices.
 This design removes the addition over heterogeneous embeddings in the input, which may potentially bring randomness, and gives more expressiveness to characterize the relationship between words/positions by using different projection matrices.