The phrase "absence of models" is correct and usable in written English.
It can be used to describe a situation where there are no existing examples or frameworks to follow in a particular context.
Example: "The research faced significant challenges due to the absence of models to guide the analysis."
Alternatives: "lack of models" or "nonexistence of models".
In the absence of models, he had to appeal for subjects and go out in search of others.
In the absence of models, the plan-making process usually inclines towards a more intuitive approach.
Just this week, she mocked up an Instagram post of herself on the Victoria's Secret catwalk as a retort to the absence of models of her stature.
In the short video, clothing dances and hypnotizes in the absence of models to the appropriately bongo-heavy jungle rhythms of Emiliana Torrini.
A major difficulty to identify efficient treatments against TPs is the absence of models easily usable in laboratory.
The highly complex and enigmatic nature of sleep and the absence of models that allow rapid multi-factorial genetic analysis have, in part, precluded a better molecular description of sleep.
Absence of modeling and simulation of high strain rate properties of syntactic foams in the published literature is noted.
However, Siamese network based trackers tend to drift towards similar target regions due to the semantic feature representations and an absence of model update.
In the absence of model errors and for infinite filter lengths, the SP-SDW-MWF corresponds to a cascade of an SDR-GSC with a speech distortion weighted single-channel Wiener filter.
The first controller takes a saturated proportional-derivative form and can stabilize the spin-axis to the desired direction with a priori bounded torques in the absence of modeling uncertainties.
Figure 4 (right) shows the RMSE (root mean square error) when identifying the predictive model's accuracy in the presence and absence of model parameters through the automated feature selection method.
