The phrase "are selected arbitrarily" is correct and usable in written English.
It can be used when describing a process or method where choices are made without a specific criterion or system.
Example: "In this experiment, the participants are selected arbitrarily to ensure a diverse sample."
Alternatives: "are chosen at random" or "are picked without criteria".
In most of the active flutter controls, the feedback control gains are selected arbitrarily or by trial and error.
Earlier investigations have shown that stable convergence cannot be ensured if the exponents are selected arbitrarily or based simply on typical rules used for static structural problems.
If the antenna array elements are selected arbitrarily, the grating lobes can be formed to undesired direction.
It is natural to consider the following iteration method that generates a sequence ({x_{n}}) according to the recursion: {x_{n+1}} = {P_{C}} bigl[ I-alpha_{n}R){x_{n}}+ alpha_{n}u-{bigl[ I-alpha_{n}R bigr],quad n ge1, (3.25) where the initial guess (x_{1}in C) and (uin H) are selected arbitrarily, while ({alpha_{n}}) and ({beta_{n}}) are two sequences of positive numbers in ((0, 1]).
It should be pointed out that the features were selected arbitrarily and there was no attempt to optimize their selection.
The buckling load and mode are determined from iterative calculations of the governing equations using the initial trial function which can be selected arbitrarily.
Naturally, one may have questions as to whether the replacement points can be selected arbitrarily, and how to choose the optimal replacement points.
For example, if two pins of NAND2 have different delay-parameters, while the binding of pins to node inputs is selected arbitrarily, the delay properties will not be preserved.
To realize this target, the computations of the required synchronization angle/s are initially accomplished independent of the fault location via considering a lumped charging current at the reference terminal which is selected arbitrarily.
