ok yes, it seems Hume’s “constant conjunction” and the “kuramoto model” are talking about the same thing: synchronization.
From a Kuramotoian perspective, constant conjunction can be understood as the tendency of the coupled oscillators in the system to synchronize with one another. According to the Kuramoto model, the synchronization of the oscillators occurs when the phase difference between two or more oscillators is small. This can be seen as a constant conjunction of their behavior.
In this way, constant conjunction can be thought of as a measure of the degree of synchronization between the oscillators in the system. The more closely the oscillators are synchronized, the more closely their behavior is conjoined.
The Kuramoto model also suggests that the synchronization of the oscillators is determined by the strength of the coupling between them. A stronger coupling results in a more closely synchronized system, and a weaker coupling results in a less synchronized system. In this way, the constant conjunction can be seen as a result of the strength of the coupling between the oscillators.