The phrase "an upper boundary of" is correct and usable in written English.
It can be used in contexts where you are discussing limits, thresholds, or maximum values in various fields such as mathematics, science, or economics.
Example: "The study established an upper boundary of 100 units for the experiment to ensure accurate results."
Alternatives: "a maximum limit of" or "a top threshold of".
One set has an upper boundary of 60 km, with 1 km vertical resolution.
In each of these cases, the line between treatment and enhancement is drawn to mark an upper boundary of professional and social obligations.
Flux values, derived from dark incubation and applied to Karenia cells only, likely represented an upper boundary of sediment contributions to Karenia nutrient budgets.
However, for simulations with an upper boundary of 80 km, no particles are assumed to exist above the model top boundary.
The abandonment limit establishes an upper boundary of another parameter that records how many times bees encounter a food source at a specific search area.
Nevertheless, the proposed boundary conditions especially for the stable region are not consistent as Peter and Flock suggested an upper boundary of 1.7 instability index for a stable displacement.
This analysis was expected to provide an upper boundary to the amplitude of vertical cell fluctuation.
One may also introduce an upper boundary for the number of edges that a path may contain if this path is used to explain an edge.
This estimate represents an upper boundary for the effect of these common variants, as most people (the majority in the center of the distribution) are expected to have a smaller individual genotype effect size.
In addition to these rules, we introduced an upper boundary for the possible number of macrostates to prevent the algorithm from reaching the trivial macrostate configuration where each macrostate consists of a single microstate.
The results of this simulation appear to most closely resemble the simulations without an upper boundary condition of supplied aerosol ("Reduced upper cloud boundary condition" section).
