Sentence examples for are usually unknown from inspiring English sources

For practical applications, system models are usually unknown.

However, the parameters of the transformation are usually unknown and are replaced by estimates.

The operating models are usually unknown, since only a finite number of observations is available.

Additionally, both CCTV screen views and CCTV coverage are usually unknown before construction is completely finished.

Nevertheless, Q k and R k are usually unknown in real situations.

In practice, (m widetilde{X},beta)), (m^{(1)}(widetilde{X},beta )) and G are usually unknown.

But in the actual environment, the parameters of NLOS error are usually unknown.

The channel correlation functions are usually unknown and time varying, which makes this technique impractical.

They present unique geometrical forms, which are, usually, unknown in the normal plant system.

For most digital communication systems, the characters of signal channel are usually unknown and varied along with time.

One of the applications for DOMP is the channel estimation [12] since the number of channel taps are usually unknown.