'certain regularity' is correct and usable in written English.
You could use the phrase when referring to patterns, habits or recurrences that may take place at regular intervals, such as "The population of the city had a certain regularity, with most people commuting to the same job each day."
Although the random path also has a certain regularity, which is slighter than the raster and circle path, so the regular ripple will be suppressed, that is, the PSDc consistent with the path spacing is suppressed.
Differences of content are obscured by a certain regularity of style.
I used to end up lost in the wilderness with a certain regularity, but it's been years since that happened.
The question has an affirmative answer for a class of circuits that fulfills a certain regularity condition.
Firstly, under certain regularity assumptions, the feasible control set is parameterized, and continuous feedback stabilizing controls are designed.
Under certain regularity conditions, the SIVLS estimator of the parametric component is shown to be consistent with a limiting normal distribution that is amenable to inference.
People may be surprised by noticing certain regularities that hold in existing knowledge they have had for some time.
The proposed GP-based method is then extended for the design of a class of interpolation filters with certain regularities.
But then the 'restriction' would leave us only with a 'science' asserting that certain regularities always hold except when they are violated.
Defining certain regularities in one's experience of the world — if not with scientific precision, then at least with observational rigor — was central to the problem of moral theory.
It has been observed that the fluctuations of the Received Signal Strength (RSS) at the nodes of a BAN on a moving person show certain regularities and that the magnitude of these fluctuations are significant (5 – 20 dB).
