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Support Vector Machines (SVM) were introduced in the early 90's as a novel nonlinear solution for classification and regression tasks. These techniques have been proved to have superior performances in a large variety of real world applications due to their generalization abilities and robustness against noise and interferences. This book introduces a set of novel techniques based on SVM that are applied to antenna array processing and electromagnetics. In particular, it introduces methods for linear and nonlinear beamforming and parameter design for arrays and electromagnetic applications.
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Presenting cognitive radio from an antenna design perspective, this one-of-a-kind resource introduces the concept of cognitive radio as a protocol that benefits from under-utilized regions of the spectrum. --
Cognitive radio networks. --- Antennas (Electronics) --- Electronic apparatus and appliances --- Ad hoc cognitive networks (Wireless communication systems) --- Cognitive networks (Wireless communication systems) --- Ad hoc networks (Computer networks) --- Self-organizing systems --- Design and construction. --- Antennas (Electronics).
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This lecture discusses the use of graph models to represent reconfigurable antennas. The rise of antennas that adapt to their environment and change their operation based on the user's request hasn't been met with clear design guidelines. There is a need to propose some rules for the optimization of any reconfigurable antenna design and performance. Since reconfigurable antennas are seen as a collection of self-organizing parts, graph models can be introduced to relate each possible topology to a corresponding electromagnetic performance in terms of achieving a characteristic frequency of operation, impedance, and polarization. These models help designers understand reconfigurable antenna structures and enhance their functionality since they transform antennas from bulky devices into mathematical and software accessible models. The use of graphs facilitates the software control and cognition ability of reconfigurable antennas while optimizing their performance. This lecture also discusses the reduction of redundancy, complexity and reliability of reconfigurable antennas and reconfigurable antenna arrays. The full analysis of these parameters allows a better reconfigurable antenna implementation in wireless and space communications platforms. The use of graph models to reduce the complexity while preserving the reliability of reconfigurable antennas allow a better incorporation in applications such as cognitive radio, MIMO, satellite communications, and personal communication systems. A swifter response time is achieved with less cost and losses. This lecture is written for individuals who wish to venture into the field of reconfigurable antennas, with a little prior experience in this area, and learn how graph rules and theory, mainly used in the field of computer science, networking, and control systems can be applied to electromagnetic structures. This lecture will walk the reader through a design and analysis process of reconfigurable antennas using graph models with a practical and theoretical outlook.
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Algorithms. --- Conduction. --- Electromagnetic scattering. --- Fast Fourier transformations. --- Infinity. --- Iteration. --- Matrices (mathematics) --- Mesh. --- Numerical analysis. --- Spectrum analysis.
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This updated edition presents topical knowledge and technologies for the thermal, chemo- and enzymatic-catalytic conversion of biomass into chemicals, materials and fuels. International experts from academia and industry cover the complete value chain from raw materials into final products. A new focus discusses feedstock, processes and products in potential concepts of future biorefining.
Biomass energy. --- Bio-energy (Biomass energy) --- Bioenergy (Biomass energy) --- Biofuels --- Biological fuels --- Energy, Biomass --- Microbial energy conversion --- Energy conversion --- Fuel --- Microbial fuel cells --- Refuse as fuel --- Waste products as fuel --- Biomass as fuel --- Renewable fuels --- Renewable energy sources
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