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In Networked Control Systems (NCS), components of a control loop are connected by data networks that may introduce time-varying delays and packet losses into the system, which can severly degrade control performance. Hence, this book presents the newly developed S-LQG (Sequence-Based Linear Quadratic Gaussian) controller that combines the sequence-based control method with the well-known LQG approach to stochastic optimal control in order to compensate for the network-induced effects.
Paketverluste --- Networked Control Systems (NCS) --- sequence-based control --- Optimale Regelung --- Sequenzbasierte Regelung --- optimal control --- packet losses --- time delays --- Vernetzte Regelungssysteme (NCS) --- Zeitverzögerungen
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In this study of arthropod predador-prey systems Michael Hassell shows how many of the components of predation may be simply modeled in order to reveal their effects on the overall dynamics of the interacting populations. Arthropods, particularly insects, make ideal subjects for such a study because their generation times are characteristically short and many have relatively discrete generations, inviting the use of difference equation models to describe population changes. Using analytical models framed in difference equations, Dr. Hassell is able to show how the detailed biological processes of insect predator-prey (including host-parasitoid) interactions may be understood. Emphasizing the development and subsequent stability analysis of general models, the author considers in detail several crucial components of predator-prey models: the prey's rate of increase as a function of density, non-random search, mutual interference, and the predator's rate of increase as a function of predator survival and fecundity. Drawing on the correspondence between the models and field and laboratory data, Dr. Hassell then discusses the practical implications for biological pest control and suggests how such models may help to formulate a theoretical basis for biological control practices.
Predation (Biologie) --- Insectes --- Insectes predateurs. --- Parasitoïdes. --- arthropode --- Predation (Biology) --- Arthropoda. --- Modeles mathematiques7 --- Populations --- Modeles mathematiques. --- dynamique des populations --- modele mathematique --- predation. --- Mathematical models. --- Nicholson-Bailey model. --- age structure. --- biological control. --- density dependence. --- disc equation. --- equilibria. --- extinction. --- functional responses. --- generalists. --- hyperparasitoids. --- interference. --- life tables. --- limit cycles. --- multiparasitism. --- negative binomial distribution. --- non-random search. --- optimal foraging. --- oscillations. --- parasitoids: contrasted with predators. --- predator: aggregation. --- preference. --- random parasitoid equation. --- searching behavior. --- spatial heterogeneity. --- survival. --- switching. --- time delays. --- zero growth isoclines.
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