The phrase "a constant relation" is correct and usable in written English.
It can be used in contexts discussing mathematics, science, or philosophy where a relationship remains unchanged over time or under varying conditions.
Example: "In physics, we often refer to a constant relation between force and acceleration as described by Newton's second law."
Alternatives: "a stable relationship" or "an unchanging connection".
For many power transmission applications, a constant relation between the motions of an input and corresponding output element is required.
With this aim a four-arm plus-shaped maze and a reference spatial memory paradigm were used, in which the goal arm was marked in two ways: by a prominent extramaze cue (intermittent light), which maintained a constant relation with the goal, and by the extramaze constellation of stimuli around the maze.
This suggests that a constant relation between the frequencies of successive sounds within a tone pair is encoded by the auditory system.
The otoacoustic emissions evoked by two tonal signals of different frequencies, f1 and f2, in a constant relation (f2/f1=1.22) were recorded.
This value is rather low, it corresponds to a coefficient of determination r2 = 0.14. Figure 4 shows that there was not a constant relation between breed variability and differential sex expression in the gonads.
Have strong faith and a constant relation with God and not religion.
Farr stated that the elevation of the soil in London had a more constant relation with mortality from cholera than any other known element.
This claim is part of Hume's more general claim that our indirect passions (including our moral sentiments) are aroused and sustained only when the pleasurable or painful qualities concerned (e.g. the virtues and vices) stand in a durable or constant relation with the person who is their object (T, 2.1.6.7/292 3; DP, 2.11).
A VLOOKUP table is useful in such circumstances where one variable changes with a more or less constant relation to another as it changes, i.e. depending upon the quantity of the independent variable.
In the proportional-position mode, there is a constant linear relation between the controlled value and the position of the final control element.
First, the matrix is assumed to be purely elastic with a constant constitutive relation owing to the small vibration force of seismic production technology.
