The phrase "a flat function of" is correct and usable in written English.
It can be used in mathematical or statistical contexts to describe a function that does not vary with its input.
Example: "In this model, the output is a flat function of the input variables, indicating no relationship between them."
Alternatives: "a constant function of" or "a linear function of".
We find evidence of a stable U-shaped marginal cost function for three main Italian generators, but a flat function for ENEL, the former national monopolist.
A spectroscopic study with the PCFO system showed that the spectrum of tissue scattering was almost a flat function in most of the visible range (650 470 nm) with a maximum at 500 nm and a rapid drop at 450 nm.
If L ( r ) is a fairly flat function of r around the maximum, then maximum likelihood poorly constrains the values, corresponding to large variances in the normal distribution.
Whereas the SD of the noise σ is a relatively flat function of u t, the parameter ρ that serves to account for the gDNA covariate varies by more than a factor of eight.
Figure 3 clearly shows that the interaction is due to an essentially flat function of performance and relative target-background level in the Spatially Co-Located scenes condition, while change discrimination is a strong monotonic function of target-background level in the Spatially Separated scenes condition.
Notice that several model fits are slightly curved, as they should be with a log-scaled mixture of white noise (a flat function) and colored noise (a sloped function).
Here, we have managed to generate output firing rates in LIF models with three different patterns (increasing, decreasing or flat) as a monotonic function of the input frequency F, under a wider, but still biologically feasible, parameter region than considered previously.
A generally accepted assumption is that the RF part provides a flat transfer function inside the bandwidth of the signal.
To account for the occasional flatness of the dimple, which is associated with cells in hypertonic solutions, which can happen inherently due to solution evaporation, we also use a "flat top" Gaussian function, of diameter b, as illustrated in Fig. 1c.
20 One model with unobserved heterogeneity fails to converge because of a flat likelihood function.
