The phrase "approximated from" is grammatically correct and can be used in written English.
It is typically used in formal or technical writing to indicate that a value or information was estimated or derived from other sources. Example: The population numbers were approximated from census data collected in previous years.
Important parameter ranges within which equipment may be operated with minimal malfunctioning were approximated from the models.
Instead, constant curvatures are approximated from the out-of-plane displacements of a patch of usually four triangular elements.
A Pareto front demonstrating the optimal tradeoffs between AEL and AGI was approximated from the simulation sample.
For a variety of reasons, however, the parental genotypes frequently are not clear and must be approximated from the available family data.
The slope of the line approximated from the axial stresses and strains is defined as the Young's modulus, and the ratio of the slope of the axial relation to that of the lateral relation is defined as the Poisson's ratio.
The study area was divided into smaller regions and average roof area for each region was approximated from the satellite visible imagery.
The crystal field splitting and the centroid shift from the free ion energy of 5d configuration were approximated from the spectrum for Ca2SiO4, Sr2SiO4 and Ba2SiO4 phosphors.
The heat quantity and grade required by each step of the cycles are evaluated and the thermal efficiencies are approximated from the heat requirements.
In the modeling, this conditional filtered mean is approximated from the filtered gradient of the progress variable of the FPI laminar flame.
The approaching wind velocity at a certain height must be approximated from the measured meteorological wind velocity because the wind data in weather data files are usually measured at a meteorological station at only one given height.
The crystallite sizes of the individual crystalline entities within the HAp and the HAp OVA particles were approximated from the (002) reflection peaks by means of the Scherrer's equation.
