The phrase "a highly simplified model" is correct and usable in written English.
It can be used when describing a model that has been made easier to understand by reducing its complexity.
Example: "In our research, we developed a highly simplified model to illustrate the basic principles of the phenomenon."
Alternatives: "an overly simplified model" or "a greatly simplified model".
A highly simplified model obtained from flatness considerations is proposed which vastly simplifies the controller design task.
The perceptron can be seen as a highly simplified model of a neuron.
Despite the complexity and diversity of bridge structures, a highly simplified model of the bridge structure is used.
The procedure uses a highly simplified model of vehicle departure, and the procedure does not allow designers to specify an explicit level of protection.
For example, a highly simplified model developed as a theoretical tool might be useful in developing explanatory insights, and yet not be useful for simulating the behavior of a natural system with some required level of quantitative accuracy.
Park and Levitt [12] used a highly simplified model to generate decoy sets of 35,000 to 200,000 decoy structures each for eight proteins.
Although this model represents a highly simplified framework, it compares well to other global estimates to which it was not fit (e.g., WHO estimates of TB mortality, previously treated TB, HIV-associated TB, and MDR-TB prevalence among previously treated cases).
In order to investigate the nature of the switches which occur during differentiation more rigorously we also considered behavior of a related (but highly simplified) model analytically.
The Simple Interactive Vegetation Model (SIVM) is a highly simplified vegetation model designed for Earth system history study.
The model presented here is a highly simplified optimization model of the kind which has often been used in life-history theory [55], [56].
Recently we have developed a highly simplified computational model for QS in which cell models communicate via diffusible signals that switch them from slow to fast random movement [10].
