The phrase "a previous formula" is correct and usable in written English.
It can be used when referring to a formula that was mentioned or used earlier in a text or discussion.
Example: "In order to solve this problem, we will apply a previous formula that has proven effective in similar cases."
Alternatives: "an earlier formula" or "a prior formula".
The other equation establishes an a prioi run away criterion for hot spot operation, being an extension of a previous formula derived by Van Welsenaere and Froment.
This paper presents a new expression to estimate the length of HTs, straightforwardly derived from the formula of I. Koichi et al. The proposed formula avoids the high error for cases with wide ripple, which is found in a previous formula used in the recently proposed approach to design FT-based FIR Hilbert Transformers (HTs) where the estimated number of distinct multipliers is minimized.
Hence, we further addressed the assembly mechanism based on a previous formula for the increasing number rate of gathering colloids [39].
This is an open letter to physicians concerning a new formula for a "nerve tonic and anti-periodic". This new product is similar to a previous formula, but without the bitter taste and at less than half the price.
Building upon a previous formula by Givoni and Goldman (1971), Pandolf et al. (1977) searched for an equation that would relate body weight, load size, walking speed, slope and terrain type to metabolic rate.
Now Kia is offering a twist on its previous formula, with a shorter, racier, al fresco version of the Sportage -- one aimed at younger drivers more likely to identify with the style than the substance.
For this work, and without loss of generality, the distinction between genetic and environmental effects is not necessary to verify the model, since all previous formulas have been derived with the complete model, showing no influence of distribution of genetic and environmental effects on the probability of ranking of an event.
He's proved his worth as a previous karting, Formula 3 champion and current Formula 2 champion.
For instance, ComScore now estimates that Primedia's sites, mainly those run by about.com, had 56 million users in the United States in December, rather than the 44 million counted under its previous formula, a 25percentt increase.
Based on the results, an addition to the previous formula for critical velocity estimate is proposed.
The ± sign in the previous formula is a plus sign if (G/K) is of the compact type, a minus sign in the other cases.
