'constrain the length' is correct and usable in written English.
This phrase is typically used to indicate that something has been limited or restricted to a certain length. For example: "We must constrain the length of our presentation to 15 minutes."
In the iterative algorithm, steps 1 to 3 serve to constrain the length of the contour segment.
GPS data was used only to constrain the length along strike of the slip model; down-dip dimensions and slip amplitude were determined using only KMU strain data.
We constrain the length of an association to be less than a pre-defined threshold.
We can further constrain the length of a tree-path (the height of the pseudo tree) to be less than a constant h.
In addition, two PD-oriented elastic springs constrain the length of the hinge and blade with elastic moduli k PD and k P D H.
The discovery that the rapid cell cycles of early development constrain the length of genes expressed during this period can be embedded in the larger context by noting that short genes also tend to be evolutionarily young [ 7, 52, 71].
During the MD runs, the LINCS algorithm [44] was used in order to constrain the lengths of all bonds; the water molecules were constrained using the SETTLE algorithm [45].
The integration time step of the simulations was set to 2.0 fs, the SHAKE algorithm was used to constrain the lengths of all chemical bonds involving hydrogen atoms at their equilibrium values [48], and the water geometry was restrained rigid by using the SETTLE algorithm [49].
The SHAKE procedure was applied to constrain the lengths of all covalent bonds involving hydrogen atoms, with a time step of 2.0 fs.
Basically it can be done by extending the definition of diagonal to not constrain the lengths of the two segments to be equal and by defining the score of an "extended diagonal" as the alignment score (penalizing gaps) of its two segments.
The integration time step of the simulations was set to 2.0 fs, the SHAKE algorithm was used to constrain the lengths of all chemical bonds involving hydrogen atoms at their equilibrium values, and the water geometry was restrained rigidly by using the SETTLE algorithm.
