The phrase "a valid background" is correct and usable in written English.
It can be used when discussing qualifications, experiences, or contexts that are acceptable or appropriate for a particular situation or role.
Example: "To apply for this position, you need to have a valid background in computer science or a related field."
Alternatives: "an acceptable background" or "a legitimate background".
In our opinion the reduced efficiency of inhibitory circuits could represent a valid background to impaired habituation, in migraine as a consistent bulk of evidence supports the reduced activity of inhibitory circuits in migraine [13, 14, 29, 30, 38, 39, 42, 43, 46, 48 50].
We therefore chose a more rigorous approach, based on the choice of control subjects who were almost certain to be seronegative, yielding a valid "background" OD distribution; we also chose a curve largely covering this distribution and made a conservative choice of cutoff (error risk below 1/1000 for the first "positive" value).
This limitation notwithstanding, our data could offer a valid background for further confirmatory research.
Therefore, to arrive at a generally valid background model, we randomized the positions of these hotspots in a manner sensitive to their physical distribution in the genome.
In this paper, a previously published phenomenological model with a valid mechanistic background is further elaborated and embedded in a vehicle simulation software (ADVISOR).
The control group is randomly assigned on the basis of their age, gender and residential area and we therefore believe them to be a valid sample of the background population.
We included genes with intensity values of more than 2.5 over background and a valid signal in more than 80% of the processed arrays in further analysis.
Section 2 introduces the basic theoretical background of launching a valid FDIA against state estimation based on linear and nonlinear model; Section 3 introduces the models and solving method of the proposed two targeted attack scenarios.
We used a valid and reliable questionnaire including items on socio-demographic background of the participants and periodontal knowledge.
A valid method for introducing molecular studies into insects without a genetic background is construction of an EST database.
Usually, anyone driving a rental car has to show a valid driver's license (and sometimes a credit card), and may also be subject to a background check.
