The phrase "ad hoc classification" is correct and usable in written English.
It can be used when referring to a classification system that is created for a specific purpose or situation, rather than being a standard or permanent classification.
Example: "The researchers developed an ad hoc classification to categorize the unique data sets they encountered during the study."
Alternatives: "temporary classification" or "specific classification".
The ad-hoc classification into "identifying data" and "other types of data" is insufficient.
In one, a descriptive analysis of marriage and childbearing histories is presented; in another, an ad-hoc classification of life courses is presented; in a third, a statistical method (i.c., a monothetic divisive algorithm) is applied.
A more plausible hypothesis is that such ad-hoc classifications are circumstantially created using mechanisms that are closer to a distance calculation between high dimensional, distributed, vector representation of concepts.
There was only one case, which could either be ophthalmoplegic or hemiplegic (according to the 1962 ad hoc committee classification of headache disorders, which lumped hemiplegic and ophthalmoplegic migraine together).
This follows the nomenclature introduced in [ 17] and applies an ad hoc criterion of classification.
When the span of text in question indirectly 'invokes' an attitudinal value, I argue that it is important that analysts do not depend entirely on intuition when deciding on a classification according to the attitude framework, and that they avoid offering ad hoc criteria by which a particular classification has been made.
The confusion and resulting bureaucratic setback arose thanks to the UC system's recent, massive, multiyear project to bring all its postdocs, who formerly worked under a wide variety of rules, job titles, and ad hoc arrangements, into a single administrative classification--with a common benefits package--governed by Section 390 of the university system's Academic Personnel Manual (APM 390).
It also matters because, as the ProPublica piece notes, the standards for classification are vague and ad hoc.
Recently, researchers have recognized the importance of deriving ad hoc domain-specific features for specific audio classification problems.
