42,047 research outputs found
Optimisation of Mobile Communication Networks - OMCO NET
The mini conference “Optimisation of Mobile Communication Networks” focuses on advanced methods for search and optimisation applied to wireless communication networks. It is sponsored by Research & Enterprise Fund Southampton Solent University.
The conference strives to widen knowledge on advanced search methods capable of optimisation of wireless communications networks. The aim is to provide a forum for exchange of recent knowledge, new ideas and trends in this progressive and challenging area. The conference will popularise new successful approaches on resolving hard tasks such as minimisation of transmit power, cooperative and optimal routing
High-speed detection of emergent market clustering via an unsupervised parallel genetic algorithm
We implement a master-slave parallel genetic algorithm (PGA) with a bespoke
log-likelihood fitness function to identify emergent clusters within price
evolutions. We use graphics processing units (GPUs) to implement a PGA and
visualise the results using disjoint minimal spanning trees (MSTs). We
demonstrate that our GPU PGA, implemented on a commercially available general
purpose GPU, is able to recover stock clusters in sub-second speed, based on a
subset of stocks in the South African market. This represents a pragmatic
choice for low-cost, scalable parallel computing and is significantly faster
than a prototype serial implementation in an optimised C-based
fourth-generation programming language, although the results are not directly
comparable due to compiler differences. Combined with fast online intraday
correlation matrix estimation from high frequency data for cluster
identification, the proposed implementation offers cost-effective,
near-real-time risk assessment for financial practitioners.Comment: 10 pages, 5 figures, 4 tables, More thorough discussion of
implementatio
Siting Multiple Observers for Maximum Coverage: An Accurate Approach
The selection of the minimal number of observers that ensures the maximum visual coverage
over an area represented by a digital elevation model (DEM) have great interest in many
elds, e.g., telecommunications, environment planning, among others. However, this problem
is complex and intractable when the number of points of the DEM is relatively high. This
complexity is due to three issues: 1) the di culty in determining the visibility of the terrain
from one point, 2) the need to know the visibility at all points of the terrain and 3) the
combinatorial complexity of the selection of observers.
The recent progress in total-viewshed maps computation not only provides an e cient solu-
tion to the rst two problems, but also opens other ways to new solutions that were unthinkable
previously. This paper presents a new type of cartography, called the masked total viewshed
map, and provides optimal solutions for both sequential and simultaneous observers location.Universidad de Málaga. Campus de Excelencia Internacional AndalucĂa Tech
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