The phrase "a ratio of unity" is correct and usable in written English.
It can be used in mathematical or scientific contexts to describe a ratio that equals one, indicating equality or balance between two quantities.
Example: "In this experiment, we aim to achieve a ratio of unity between the two solutions to ensure optimal reaction conditions."
Alternatives: "a unity ratio" or "a one-to-one ratio".
Thus, a sex ratio of unity is a stable, balanced polymorphism, achieved in many species by chromosomal determination of sex, which Ford referred to as a "'built-in' genetic switch-mechanism", characteristic of other genetic polymorphisms, like Batesian mimicry.
The sample size calculation was based on a one-sided testing procedure with an alpha of 5% and assumed a true ratio of unity.
Remarkably, at a viscosity ratio of unity, the droplets remain in a nearly undeformed state as the capillary number is varied between 2 and 8, apparently because under these conditions a tendency for the droplets to widen in the vorticity direction counteracts their tendency to stretch in the flow direction.
The sample size calculation was based on one-sided testing with an α value of 5% and assumed a true ratio of unity.
For shear flow with moderate capillary numbers, we see that the behavior of a low-viscosity drop is similar to that of drop with a viscosity ratio of unity.
The unusually high relative frequency of cancer in the laryngeal region in males (18% of all histologically diagnosed cancers) and a sex ratio of unity for lung cancer in Northern Thailand were further explored in a hospital-based case-control study in Chiang Mai.
The PLMS imaging shows that the nonreacting jets at all density ratios studied exhibit large-scale organized motions as observed in previous studies at a density ratio of unity.
For specific malignancies, the results are inevitably less certain owing to smaller numbers, but the spread of findings on either side of a hazard ratio of unity points to no identifiable signal.
With premixed methane and air flowing in a round duct with stabilization by a disk, the amplitude of oscillations was largest close to an equivalence ratio of unity and led to NOx emissions some 20% less than those without oscillations.
The HER2 hazard ratio estimates based on the BCAC data are for HER2-positive cases compared with HER2-negative cases, and so these were rescaled to give an average hazard ratio of unity using an estimated prevalence of HER2 of 9% in ER-positive cases and 25% in ER-negative cases.
