The phrase "a working threshold" is correct and usable in written English.
It can be used to refer to a level or point at which something becomes effective or operational, often in contexts related to performance or measurement.
Example: "We need to establish a working threshold for the project's success metrics to ensure we are meeting our goals."
Alternatives: "operational limit" or "functional boundary".
Some of this may be related to different average infection intensities in the different countries, however there may also be other sources of variation, such as the working threshold for calling a cassette reading as trace positive.
For simplicity, we chose v th = − 20 mV as this working threshold, where the slope of v ( t ) turns significantly positive preceding each spike (see Figs. 4a, c), for both Type I and Type II neurons.
Since active mediums always have resonant enhancement of nonlinear effect, fast response speed, and low working threshold, many intense applications of IPPCs, such as fabrication of resonantly absorbing waveguide arrays[16, 17] and inverted nonlinear photonic crystals[18], have been reported.
A threshold working pressure of around 14 mTorr and a minimum hydrogen concentration of about 70% were found necessary before any crystallinity was detectable.
A predicted conserved protein complex is considered to match with known protein complexes if their overlapping score OS (see Eq. 3) is equal to or larger than a threshold (in this work, threshold = 0.2) [ 18].
Again, the work of Stanford and colleagues illustrates that a scheme in which alternative motor plans compete to reach a threshold works well even when decisions are urgent and choices quick.
In other works, a threshold hysteresis in skin probability maps was applied to accept those regions, which are connected with the seeds of high skin probability [36, 55].
It works by thresholding a neighborhood with the gray level of the central pixel.
So the former has a larger incentive to stay working and a higher threshold retirement wealth level than the latter and tends to delay retirement.
