The phrase "a range of durations" is correct and usable in written English.
It can be used when discussing various lengths of time or periods in a specific context, such as scheduling or planning.
Example: "The project will require a range of durations for different phases, from a few days to several months."
Alternatives: "a variety of time spans" or "a spectrum of time lengths".
The use of a range of durations, rather than a single duration, made it possible to test for a duration of treatment effect.
The aim of this work was to compare the performances of 21 non-selective refocusing pulses spanning a range of durations and SAR levels.
The convergence was abrupt even though a range of durations for afferent input was a feature of the model.
Furthermore, on the technical level, one must produce a time-dependent description the expression of DnaA over cell-cycles of a range of durations.
This study benefited from the measured maternal serum concentrations over a range of durations of breastfeeding, but is not longitudinal, because repeated measured concentrations were not collected during the course of breastfeeding to allow a direct estimate of actual change.
Because each athlete was expected to run a different total volume of training each week, coaches gave athletes a range of duration (minutes) of training each day depending on the athlete.
That said, we do observe a range of duration from 1 – 85 years with 10% of our immigrant observations residing in the UK for less than 8 years and 5% for less than 3 years.
Based on available data, it appears that each product provides a range of duration, generally 3 to 5 months.
Although in normal behavior, the duration is given by the main sequence, we will consider a range of hypothetical durations and for each duration calculate the trajectory that produces the smallest variance in saccade endpoints, averaged over a 50 ms post-movement fixation period [13].
A range of pulse durations between 12 ns and 200 ns was employed.
Once the characteristic properties of the data were delimited, the synthetic data were created by randomly sampling from a range of mean durations from 0.0 to 10.0 units.
