The phrase "are of order" is correct and usable in written English.
It is typically used in mathematical or technical contexts to describe the classification or rank of a system, structure, or object.
Example: "The elements in this group are of order three, indicating that they can be arranged in three distinct ways."
Alternatives: "have an order of" or "are classified as".
The rms noise levels in the single-sideband spectra are of order 0.2 K at 1 MHz resolution.
The convergence rates of the present schemes are of order O h4+τ2).
We also determine that the mechanisms in the system are of order one.
Uncertainties are of order 0.5 Å and arise mostly from thermally induced pointing errors, which have been increasing over time; shifts of ∼ 1 Å have been seen.
We use JK flip-flop circuits because they are of order 2 and no state of indetermination.
In that case, the Rosetta spacecraft presence cannot be neglected due to its conductive structures, the dimensions of which are of order of the emitter receiver distance.
MR visualisation shows that fractional variations in steady-state conversion within slice sections of the bed, perpendicular to the direction of superficial flow, are of order 20%.
For some observations these offsets are of order 15 arcsec (~30 ACIS pixels) in both dy and dz, so the mean chip coordinates may be uncertain by this amount.
For many observations this won't have much impact, but as the mission has progressed the offsets have become significant and now the offsets are of order 15 arcsec range (~30 ACIS pixels) in both the dy and dz directions.
A recently developed linear parameter-dependent LMI approach to state-feedback H∞ control of uncertain polytopic systems is then used to design a robust output-feedback controllers that are of order comparable to the one of the plant.
In this fast reaction, mass transfer controlled regime, the fluid temperature reaches the adiabatic value (and the mean exit conversion is close to unity) only when the P values are of order unity or smaller.
