The computational complexity and the approximation algorithms of the optimal p-source communication spanning tree (p-OCT) problem were investigated.
The optimal product-requirement communication spanning tree is the spanning tree with minimum total routing cost summed over all pairs of vertices.
Both problems are special cases of the optimum communication spanning tree problem, and are reduced to the minimum routing cost spanning tree (MRCT) problem when all the vertex weights are equal to each other.
The optimal product-requirement communication spanning tree (PROCT) problem is to find a spanning tree T minimizing ∑u,v∈Vr u r v dT u,v), where dT u,v) is the length of the path between u and v on T. The optimal sum-requirement communication spanning tree (SROCT) problem is to find a spanning tree T such that ∑u,v∈V(r u)+r v dT u,v) is minimized.
Again the whole process of communication spans two phases, i.e., the broadcast phase and the multiple access phase.
Ham radios became the main communication to span the city".
"The Police Department's citywide system couldn't do it, so ham radios became the main communication to span the city" for the race, he said.
In a more recent version, suggested by Wilkinson (personal communication), the span of t is the set of all plenary trees T such that T|ℒ t) = t.
Behavioral strategies in providing coping and communication support span guided imagery, relaxation training, music, distraction, role playing, and other broadly accepted complementary therapies involving behavioral change by the patient.
In humans, brain connectivity implements a system for language and communication that spans from basic pre-linguistic social abilities shared with non-human primates to syntactic and pragmatic functions particular to our species.
His inventions set the stage for the development of wireless telegraph and radio communication, which spanned the Atlantic by 1901.
