The phrase "at these speeds" is correct and usable in written English.
It can be used when discussing the implications or effects of certain speeds in various contexts, such as transportation, technology, or physics.
Example: "At these speeds, the vehicle is able to cover long distances in a fraction of the time."
Alternatives: "at such velocities" or "at these rates".
At these speeds, the film can't register people rushing past; some disappear, others become transparent ghosts.
You need to take this into account when calculating forces at these speeds.
Mitigation measures designed to cope with all phenomena occurring when trains travel at these speeds have been costed into the project".
"Being close to other competitors, door to door, whatever environment takes place on the racetrack, at these speeds, she was very comfortable.
He's got a host of films coming up – thrillers The Jesuit and The Brits are Coming, as well as playing a coach in a film about running, Life at These Speeds.
The velocity rises rapidly to a maximum of a little over 110 kilometres an hour before steadying to a constant speed of around 80. At these high speeds any impact would likely be fatal if not severely damaging (consider impact with a car travelling at these speeds) … Clearly gliding using a batcape is not a safe way to travel, unless a method to rapidly slow down is used, such as a parachute".
At these speed settings, subjects were freer to sway and move their head which probably lead to a few false detections due to zero-crossings detected due to sudden head motion while talking or looking around.
Percentage stance times are known to decrease with speed; at these respective speeds, affected limb percentage stance time for each group were 72.4 ± 0.6 (pre-operative), 70.2 ± 1.0 (sham), 67.3 ± 0.9 (NP alone), and 65.7 ± 1.0 (NP and sTNFRII), and contralateral limb percentage stance times were 72.6 ± 0.7 (pre-operative), 69.6 ± 1.2 (sham), 71.4 ± 1.0 (NP alone), and 66.0 ±1.1 (NP and sTNFRII).
And systems that merely scrub speed could only scrub about 9% at these higher speeds.
Three-dimensional data sets acquired at these fast speeds still show residual motion artifacts, suggesting that increasing OCT speeds alone is not sufficient to overcome head and eye motion induced distortions in densely scanned 3D data sets.
The Blackbird, which could fly at speeds greater than mach 3.2, experienced extreme drag forces at these high speeds in spite of its streamlined design — extreme enough, in fact, that the metal fuselage of the plane would actually expand from the heat generated by the friction of the air in mid-flight.[12].[12]
