Compute the `p`

by `p`

matrix \(\mathcal{D}\) whose columns describe
how potentially infectious person time from persons in that patch are dispersed
across other patches.
$$\mathcal{D} = \mbox{diag}\left(W \right) \cdot \beta^T \cdot \mbox{diag}\left(bDH\right) \cdot \beta$$

## Arguments

- W
ambient human population at each patch

- beta
the biting distribution matrix

- b
transmission efficiency from mosquitoes to humans

- D
human transmitting capacity

- H
human population size of each strata

## Value

a numeric matrix