doubly stochastic model造句

An example of a doubly stochastic model is the following.
The basic idea for a doubly stochastic model is that an observed random variable is modelled in two stages.
In terms of ordinary statistical ideas, this is equivalent to compounding the distributions of random variables and it may be considered a simple case of a doubly stochastic model.
This is in contrast to other possible representations of locally varying variability, where the variability might be modelled as being driven by a separate time-varying process, as in a doubly stochastic model.
For the more general case of doubly stochastic models, there is the idea that many values in a time-series or stochastic model are simultaneously affected by the underlying parameters, either by using a single parameter affecting many outcome variates, or by treating the underlying parameter as a time-series or stochastic process in its own right.
It's difficult to find doubly stochastic model in a sentence. 用doubly stochastic model造句挺难的