The phrase "a complex model that" is correct and usable in written English.
You can use it when describing a model that has multiple components or intricate features, often in scientific or technical contexts.
Example: "The researchers developed a complex model that simulates climate change impacts on various ecosystems."
Alternatives: "an intricate model which" or "a sophisticated model that".
The United States, which has worked with Cambodia on a complex model that would use a combination of foreign and local judges and prosecutors, said it was disappointed by the United Nations pullout.
This unit is associated with a complex model that is highly compute-intense.
In this study, a complex model that considers the characters of pore microstructure and fluid in porous media is developed for the permeability and porosity of porous media.
In order to tackle this issue, in this paper we present a complex model that targets to obtain the financial equilibrium between agents to ensure the compliance of transactions (purchases and sales of energy), considering key risk indicators.
This method differs from the others presented in the previous sections in that it uses a rather simple background model (just a reference image); instead of defining a complex model (that could be hard to learn reliably), the method attempts to exploit as much as possible the basic background model by introducing a set of enhancements in the operations that deal with the model.
Model (26) represented a complex model that included all the modulatory effects that were consistent across subjects (Table 2).
We also fitted a more complex model that included a genetic component that contributes to the sex ratio variation.
So much so that if biologists today ask for help in analysing their data, they are likely to get either a statistically correct model with simple behaviour or a dynamically complex model that may shed more insight into the biological problem based on very naïve statistics.
It was shown that the control-oriented modeling approach captures these essential properties, resulting in a less complex model that is well suited for control design and analysis purposes, and at the same time has the same essential properties as the complex model presented in "A complex model of underwater snake robots".
As seen from Figure 6, some of the parameters and state variables could be predicted even more accurately using a higher number of clusters in the N-way HC-PLSR, but that would lead to a more complex model that would be more difficult to interpret in a sensitivity analysis.
While a highly complex model that incorporates intrahost genetic diversity and transmission bottlenecks of a specified size may more faithfully capture the mechanistic origins of deleterious mutations, this model's complexity would very likely limit our ability to identify the specific roles that circulating deleterious mutations play in shaping patterns of influenza's antigenic evolution.
