The phrase "a preliminary calculation of" is correct and usable in written English.
It can be used when referring to an initial estimate or assessment of a particular value or outcome before final calculations are made.
Example: "The report includes a preliminary calculation of the project's total costs, which will be refined in the final analysis."
Alternatives: "an initial estimate of" or "a first assessment of".
A preliminary calculation of the energy resource from decommissioned wells in Poland and a simulation of the heat exchange achievable from depleted oil wells are presented in this paper.
During the seventeenth century, Tycho Brahe measured the diurnal parallax of Mars that Johannes Kepler used to make a preliminary calculation of the relative distance to the planet.
A preliminary calculation of network connectivity was used to identify the most connected probe for each gene.
A preliminary calculation of burden of disease in Copenhagen has shown that the burden of disease from accidents was lower in Copenhagen and surrounding municipalities than in Denmark overall.
A preliminary calculation has been pursued to examine the performance of the present substitution models in the ML inference of a phylogenetic tree.
A preliminary calculation is carried out based on the response mechanism of cement and electrolytic aluminum.
A preliminary calculation suggests that the costs associated with undiagnosed abuse may indeed exceed those of diagnosed abuse.
A preliminary calculation, assuming pressurizing the off-gas at 20 °C showed that condensed water might contain a certain percentage of isobutene.
EN 14531 regulation [2] provides indications concerning preliminary calculation of braking performance, giving a general workflow that can be adapted to different vehicle categories: Freight wagons, Mass transit, Passenger coaches, Locomotives, and High-speed trains.
This paper presents preliminary calculation of margin exchange between material strength and the accuracy and frequency of inservice inspection (ISI), taking a reactor vessel of a fast breeder reactor, of which dominant failure mode is creep-fatigue, as an example.
In this article we discuss the flux ratio between two lines from excited states of 12C (f15.11/f4.44) and our results of preliminary calculation of intensity ratio between two neutron capture lines at 3He and 1H (f20.58/f2.223).
