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Metaheuristic Computation: A Performance Perspective

Metaheuristic Computation: A Performance Perspective

Erik Cuevas; Primitivo Diaz; Octavio Camarena

Springer Nature Switzerland AG
2021
nidottu
This book is primarily intended for undergraduate and postgraduate students of Science, Electrical Engineering, or Computational Mathematics. Metaheuristic search methods are so numerous and varied in terms of design and potential applications; however, for such an abundant family of optimization techniques, there seems to be a question which needs to be answered: Which part of the design in a metaheuristic algorithm contributes more to its better performance? Several works that compare the performance among metaheuristic approaches have been reported in the literature. Nevertheless, they suffer from one of the following limitations: (A)Their conclusions are based on the performance of popular evolutionary approaches over a set of synthetic functions with exact solutions and well-known behaviors, without considering the application context or including recent developments. (B) Their conclusions consider only the comparison of their final results which cannot evaluate the nature of a good or bad balance between exploration and exploitation. The objective of this book is to compare the performance of various metaheuristic techniques when they are faced with complex optimization problems extracted from different engineering domains. The material has been compiled from a teaching perspective.
Vegetation of the Canary Islands

Vegetation of the Canary Islands

Marcelino J. del Arco Aguilar; Octavio Rodríguez Delgado

Springer International Publishing AG
2018
sidottu
The volcanic and oceanic nature of the Canary Islands, its rich plant biodiversity and high rate of endemism, as well as the relict character of some of its plant communities make it a territory of great biological interest. The main geographic, climatic, bioclimatic, biogeographic and floristic features of the Islands are shown and related to the distributional pattern of potential communities along an altitudinal gradient. Current vegetation units and their ecology are described and illustrated with numerous pictures. Potential vegetation units are summarized and comprehensive maps of the potential natural vegetation for each island are given. Human impact on the natural landscape, the occurrence of invasive plants, and the probable impact of climate change on the flora and vegetation are discussed. The conservation status of flora and vegetation are assessed. Four appendixes include a syntaxonomical scheme, a brief history of botanical studies and explorations in the Islands, ethnobotanical notes, and a list of selected literature.
Hidrogeles entrecruzados de PAAm/CA - Aplicación subdérmica en ratas

Hidrogeles entrecruzados de PAAm/CA - Aplicación subdérmica en ratas

Juan Carlos Sánchez Díaz; Agustín Martínez Ruvalcaba; Rubén Octavio Muñoz García

Editorial Academica Espanola
2021
pokkari
La poliacrilamida (PAAm) y el acetato de celulosa (AC) forma una red polim rica interpenetrada mediante un mecanismo de radicales libres con o sin la adici n de una agente entrecruzante, la N, N'-metilenbisacrilamida (NMBA). El hinchamiento y el m dulo de compresi n dependen de la cantidad de AC, a mayor cantidad de AC menor hinchamiento y mayor m dulo de compresi n. Se midieron los grados de hinchamiento y m dulos de compresi n de diferentes mezclas de hidrogeles. Posteriormente se implantaron en ratas Wistar y durante un periodo de 7 semanas, se midieron los m dulos de compresi n de los implantes al 15 y 20% en masa con NMBA o sin NMBA, los cuales se modifican al estar en contacto con tejido vivo.