The phrase "a difficult model for" is correct and usable in written English.
It can be used when discussing a model that presents challenges or complexities in understanding or application, often in academic or technical contexts.
Example: "The researchers found that developing a difficult model for predicting climate change required extensive data analysis and computational resources."
Alternatives: "a challenging model for" or "a complex model for".
The lack of a posterior tibial attachment of the lateral meniscus makes the New Zealand white rabbit a difficult natural history model for lateral meniscal pathology.
"It's a difficult time for models," says Marc Jacobs, the chief sponsor of the Costume Institute exhibition.
Modelling an area source such as landfill is a difficult task for numerical models due to turbulence phenomena that modifies the flow near the source increasing ground level concentration (GLC).
Therefore, complexity due to various interactions between different levels is lucrative for nature in many ways although difficult to model for scientists as it obstructs simple abstraction (see also Section 1.2.1).
That term (usually only partly understood), along with a few really difficult sections of "A," made Zukofsky a model for several anti-personal avant-gardes.
The relatively high protein binding and low volume of distribution of daptomycin recorded in humans or animal models represent a difficult challenge for defining a dosing schedule exerting optimal bactericidal activity against major categories of serious S. aureus infections [ 12, 21- 29] in various deep-seated compartments though minimizing skeletal muscle side-effects [ 30, 31].
One generalist, scoring heat-related mortality at 'full PDF', suggested that it shouldn't be difficult to "tune a model for mortality surveillance or expected mortality".
Similarly a fluorescently tagged polysaccharide (4 kDa FITC-dextran), a model for difficult-to-release small proteins and polysaccharides, was also released, albeit more slowly.
Its enormous biochemical complexity [ 440] makes detailed, microscopic modeling approaches a difficult task while, for instance, its response to exerted forces and their use for environmental sensing makes them physically very appealing to study [ 440, 441] (Section 3.3.6).
Generally, it is very difficult to develop a mathematical model for the real-time situations in FJSSP.
