Noises are inevitably introduced in digital image acquisition processes, and thus image denoising is still a hot research problem.
The main drawback of this approach is that some of the static nodes that are selected as RPs (e.g., central node in the deployment area) will induce a hot spot problem which may decrease the network lifetime and reliability.
This way of data collection always leads to a "hot spot" problem [12] that means nodes near the sink or base station run out of energy very fast so that the network performance has been affected.
The fixed-bed or packed-bed type reactor has its drawbacks, which are heat transfer limitation, i.e. a hot spot problem involved highly exothermic characteristics of FT reaction, and mass transfer limitation due to the condensation of liquid hydrocarbon products occurred on catalyst surface.
But possibly the harshest criticism Black has received to date may be this week's comparisons to Double Take, a teen pop duo whose music video "Hot Problems" has been viewed more than one million time on YouTube.
If the number of events and sinks is high, congestion may happen around the center of the network and creates a hot spot region problem.
Therefore, constructing a high-quality graph has become an increasingly hot research problem, which inspired many graph construction methods being proposed in the past years.
I wrote my way into the book with images, like two argumentative heads bobbing on waves in the ocean on a hot day; with language problems, or voices I wanted to tackle, like that of an Irish-American folksinger discovering he's no Bob Dylan; and with weird personal questions about the mystery of my own grandmother's unilluminated (to me) emotional dark matter.
There will be practical difficulties as well as theoretical ones: simple things like keeping vaccines cold in a hot country are a huge problem.
Here's how Grantham, an ardent environmentalist, recommended applying that dynamic to the problem of a hot planet: People are naturally much more responsive to finite resources than they are to climate change.
