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"significant oscillations" is an acceptable phrase in written English
You can use it to refer to a pattern of alternating up and down movements, especially if those movements are large and/or meaningful in some way. For example, "The stock market saw significant oscillations over the past several days."
Exact(20)
In this case, we can see that the frame-by-frame PSNR curve shows significant oscillations.
The combustion process is characterized by significant oscillations of the product oxygen flow rate.
Liu and Osher [10] noted that high-order ENO/WENO schemes generate significant oscillations when solving hyperbolic systems unless costly characteristic decompositions are used.
Higher-order ENO reconstructions decrease damping but generate significant oscillations when solving hyperbolic systems unless costly characteristic decompositions are used [10].
Significant oscillations of the pyrometric signal were observed during annealing in air of TiO1.5N0.5 coatings in the temperature range 673 823 K.
Four areas of significant oscillations have been detected in the full scale S2A wind tunnel for wind velocities between 10 and 60 m/s.
Similar(40)
While the actual force profile also exhibits significant oscillation, the dominant frequencies of this oscillating force component were found to be independent of cutting and non-cutting instances, and hence could be imposed as a uniform background signal.
However, the three significant oscillation frequencies of the lift coefficient appear to have almost constant values.
A huge amount of significant oscillation results has been collected in several excellent monographs, see, e.g., [1, 2, 16, 21].
The appropriate degree of damping depends on mesh size and must be introduced in order to obtain reliable numerical solutions; weak damping leads to significant oscillation and strong damping to artificially low rupture speeds and low slip rates.
The characteristic values of the hydrodynamic forcing in terms of the drag and lift coefficients and the three significant oscillation frequencies extracted from the temporal variation of the forcing signals are associated with the flow regimes and wall proximity.
More suggestions(15)
substantial oscillations
significant variants
appreciable oscillations
significant shocks
prominent oscillations
remarkable oscillations
significant doubts
noticeable oscillations
significant imbalances
significant wobbles
considerable oscillations
significant swings
significant deviations
significant shifts
large oscillations
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com