The phrase "a third model of" is correct and usable in written English.
It can be used when referring to an additional or alternative model in a series of models being discussed or compared.
Example: "In our research, we propose a third model of economic growth that incorporates environmental factors."
Alternatives: "an additional model of" or "a new model of".
We are still waiting, though, for a third model of news publishing to emerge.
Less than three months after unveiling a slimmer, sleeker version of the Kindle, Amazon unveiled a third model of its electronic book reader on May 6th.
The findings in Fig. 3 can be summarized by Eq. 3. The equation calculates the expected aggregated accuracy, Aagg, of two models with an average accuracy of 87% when aggregated with a third model of accuracy Avar.
Hyv may offer a third model of monetization that could benefit future mobile applications: It could allow users to install an app and, in return, allow for some of their phone's processing power to be used and sold to compensate the app creator.
We then used a third model of iNKT KO mice to test the effects of Tregs on NKT cells.
We removed the coupling between divergent and convergent transport in a third model of axon formation.
It was designed along the lines of the Wrights' first flyer of 1903 and a second model of 1904, but it also incorporated several important improvements.
A second model of Trinitarian doctrine suspected of heresy from the outset which had effects not only in theology but also in the social metaphysics of the West as well, emanated from Joachim of Fiore.
In this article, a first model of TPS leads to a second model of second language writing in the context of English for academic purposes.
In order to simplify the model, a second model of ANN was proposed without curvature ratio.
A second model of the volume of inflow during snowmelt constrained the magnitude of seasonal variability in isotopic composition.
