Another general limitation is that some of these methods are EM-based learning approaches which makes recursive learning and updating difficult.
As the diagnosis of cancer relies on the WHO classifications of diseases (ICD), which are regularly updated, it is difficult to examine time trends in cancer incidence by site covering different revisions of the ICD.
Barring updated research, it's difficult to pinpoint exactly how common TSS is today, but the recently reported cases show that it's certainly not obsolete.
The reason for this, as discussed above, is that the NMF cost function measures the precision of reconstruction of the original reverberant speech, rather than dereverberation that should be left for matrix R. Note that matrix R is updated only once, as our preliminary experiments revealed that by alternating the R and A updates, it is difficult to obtain stable estimates for both matrices.
For example, when scenes are coded at a low bitrate, the motion caused by the I-frame update is typically difficult to detect in a hard-to-code scene yet becomes obvious in an easy-to-code sequence with very little motion, such as 'NTIA Snow Mountain' from CDVL.
The HSAs report that a lack of registration updates makes it difficult to stay current with providers; officials do not know whether health workers are still practicing or even if they are in the country and therefore they cannot assess current health care shortages and surpluses.
The speaking characters were more difficult to update, but even they will hew closely to the hallmarks of the past.
2) The quote feature is also quite limited as to configurations it can handle, and it's difficult to update to incorporate new features and pricing realities.
"We'd had a site for several years but it was static and difficult to update," he said.
Applying to the App Store had a long lead time and it would have been difficult to update content as often as the performance requires.
