The phrase "ad hoc features" is correct and usable in written English.
It can be used to describe features that are created or implemented for a specific purpose or situation, rather than being part of a standard or permanent solution.
Example: "The software includes several ad hoc features designed to address the unique needs of our clients."
Alternatives: "temporary features" or "specific features".
The result is comparable to other published work in protein name recognition, without resorting to manually prepared ad hoc feature engineering.
Overall speaking, these ad-hoc features were included to capture the importance of a chemical/disease in an article (#1 8), the strength between a possible disease and chemical relation (#9–#11), and the context that a disease or chemical is involved in CID relations (#12–#12).
Dornau: Corporate Social Responsibility (CSR) has evolved from an ad-hoc feature to a strategic imperative for corporations.
The noise would enter feature selection as outliers and produce less informative or even ad-hoc feature sets (e.g., peaks with less biological meaning), which would lead to an inaccurate or even poor decision function in classification and affect the disease phenotype diagnosis, generalization, and biomarker discovery in translational bioinformatics.
The method development entailed the definition of the individual's representation as well as the design of a graph-based fitness function, along with the formulation of several other ad hoc implemented features.
In this study, we develop an ad hoc iterative feature (variable) reduction algorithm for basic PNNs to identify noise and redundant variables.
Recently, researchers have recognized the importance of deriving ad hoc domain-specific features for specific audio classification problems.
Generally in audio signal processing, ad hoc domain-specific features have also gained considerable attention during the past few years, mainly applied to specific audio classification problems.
