specific rates

specific rates

statistical rates in which the events in both the numerator and the denominator are restricted to a specific subgroup of a population.
References in periodicals archive ?
For example, the rate for a high-impact polystyrene (HIPS) resin ranged from 34 kg/hr at 50 rpm to 76 kg/hr at 150 rpm - specific rates of 0.
If scientists could demystify the physics behind that magic, they might discover ways of making drug-laced crystals that disintegrate at specific rates in the body, for instance, or crystals that process photons the way silicon-based chips process electrons, creating a new generation of communication and computing technologies, notes chemist Bruce M.