For prewhitening we employ a whitening filter that is optimal in a certain sense, but this means constraining the whitening matrix in the manifold of positive-definite, para-Hermitian matrices.
In Nelson's definition, "free user movement" means "not constrained by forms like adventure games and computer-assisted instruction, where the writing may be nonlinear but the user has little or no explicit freedom".
The American Federalists made it clear they were establishing a republic, not a democracy, and designed myriad means to constrain the popular will.
But after all the education that we Americans have had and all the relished progress we've made, being gay does mean feeling constrained in situations where most people aren't, scared in circumstances that wouldn't frighten others in the least, self-conscious when you shouldn't have to be.
One means of constraining the incision history of basins is dating the remnants of gravel-capped surfaces above modern streams.
Quantifying the rates and timing of landscape denudation provides a means to constrain sediment flux through time to offshore sedimentary basins.
This gradient approach particularly applies for the detection of coseismic signals with limited time span (e.g., a few months after the earthquake) of monthly GRACE solutions and potentially provides a means to constrain fault slip models with large-scale gravitational changes from GRACE observations.
Inverse modeling of fire emissions using in situ measurements or satellite observations provides a means to constrain fire emission estimates: however, these methods can not provide a direct quantification of emissions from fires.
Our means are constrained: the U.N. resolution we're enforcing explicitly rules out ground forces, and President Obama has repeatedly done so as well.
References [3, 16] considered the power flow as the objective function, and accomplished the splitting strategy by means of constrained spectral clustering.
