"usual concept" is correct and usable in written English.
You can use it when you want to refer to a concept that is commonly accepted or widely understood. For example, "The usual concept of success is getting a good job and making money."
One of the first things to go was the usual concept of a control group — people who would not receive interventions to encourage healthy eating.
This is a reversal of the usual concept of autistic children but one which I have heard expressed by several parents.
The usual concept of three-component materials does not work in wood composites, micromechanical deformations must be controlled to diminish or completely eliminate cavitation and to increase the plastic deformation of the matrix polymer.
The concept of a p-automatic monoid is a variant on the usual concept of an automatic monoid designed to allow a geometric characterization analogous to the group case.
To this end, we derive a light bulb colour estimator based on Bayesian reasoning, directional data, and image formation model in which the usual concept of reflectance is not used.
For it, we introduce the notion of strong attractor for a discrete dynamical system, which is more restrictive than the usual concept of attractor when the dimension of the system is higher than one.
Step 4 and 5 are different from usual concepts.
Yet, after exhaustive research, we have found nowhere in the debates or hearings, or in the arguments of those supporting complete self-government for the Islands, even a hint that the phrase 'of local application' represents any type of a restriction upon the local government, above and beyond our usual concepts of legislative jurisdiction.
The results not only extend some of the existing results on these two types of equation but also indicate that the notions of detectability and observability studied in this paper take analogous functions as the usual concepts of detectability and observability in deterministic linear systems.
He asserts that the substantial nature of the physical world is the unknown structure of atomic parts, not a substantial form which reflects our usual concepts.
The usual concepts of oscillation or stability of steady state solutions do not catch all their fine details, and it is necessary to use the concept of frequency measures introduced in [7] to provide better descriptions.
