Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 96 for “"System Science"”.
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The integration of urban system science and physical design: dynamic simulation technologies for urban resilience
… with the deep uncertainty inherent in urban systems. While design/planning solutions are intended to manage or abate a wide array of negative impacts on the built environment, they many times fail to achieve their intended goals due to an inability to assess the complex interactions in urban …
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Variational sensitivity analysis and data assimilation studies of the coupled land surface-atmospheric boundary layer system
One of the fundamental components of Earth system science is understanding coupled land-atmosphere processes. The land plays an especially important role in the climate system principally via the regulation of surface fluxes of moisture and energy into the atmosphere. Due to the mutual dependence …
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SYNTHESIS OF LINEAR MULTIVARIABLE FEEDBACK SYSTEMS IN INFINITE INDEX NORM
… the synthesis of linear multivariable feedback systems in H(,(INFIN)) norm is developed from the singular value analysis. The positive feature of H(,(INFIN)) norm synthesis is the transparency for robustness conditions, the weighting functions are directly related to the specifications of design …
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On the role of the Southern Ocean in the global carbon cycle and atmospheric CO2 change
… foremost problems in palaeoceanography and Earth System Science regards the mechanism(s) responsible for natural changes in atmospheric CO2 concentration. It is becoming clear that the Southern Ocean overturning circulation plays an important role in the global carbon cycle because altered …
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Metodología para el análisis espacio-temporal de los cambios en la cobertura de formaciones adehesadas. Aplicación a la Sierra Morena andaluza
… Ciencia de los Sistemas de Usos del Suelo (Land System Science) y adopta un enfoque multiescalar, combinando la elaboración de cartografía de referencia, el análisis de cambios en la cobertura adehesada y la aplicación de modelos espaciales. Los resultados muestran una pérdida neta de superficie …
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RISK AND UNCERTAINTY (UTILITY, DECISION)
<p>The conventional theory of decision making under risk relies on axioms that reflect assumptions about people's subjective attitudes towards wealth. The assumptions are unverifiable, and the axioms are too restrictive. They forbid some decision rules that a plausibly rational decision maker …
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THE ANALYSIS AND SIMULATION OF HYBRID STEPPING MOTORS USING THE PHASE PLANE APPROACH
<p>Stepping motors have become very popular electromechanical interface devices because they are easy to interface to digital control logic. The most popular stepping motor currently used is the hybrid design stepping motor. It incorporates an efficient magnetic structure to obtain a high output …
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DECENTRALIZED CONTROL OF DISTRIBUTED PROCESSING SYSTEMS
… decentralized scheduling for distributed systems. The environment in which the controlling entities make decisions is stochastic and can be described as uncertain since each entity may have a different view of the system state. As a consequence, these entities may make inconsistent …
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Solver for TCP flows in a network
Quality of Service (QOS) of a congested network can be evaluated by some key factors such as packets discarding rate, queueing delay and the throughput of a bottleneck buffer. A network designer needs to predict these parameters in order to dimension a network properly. This thesis developed a …
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Multiple classifier combination through ensembles and data generation
This thesis introduces new approaches, namely the DataBoost and DataBoost-IM algorithms, to extend Boosting algorithms' predictive performance. The DataBoost algorithm is designed to assist Boosting algorithms to avoid over-emphasizing hard examples. In the DataBoost algorithm, new synthetic data …
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Three-dimensional visualization of multi-layered graphs with application to communications
This thesis introduces two new algorithms for 3D graph drawing and network display. The first algorithm, the Incremental Projection Algorithm , is a new universal algorithm for displaying any graph of any vertex degree. The above algorithm can be implemented to display graph in 3D space without …
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A multiplexed feedback solution for isolated digital power supplies
… started looking at ways to control the system cost by reducing components and their technical requirements. This thesis proposes a multiplexed digital feedback solution for isolated digital power supply systems. Several digital isolators used in existing applications can be reduced to …
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Hybrid Switched System Visual Servo Control
Furthermore, nonholonomic systems present a control task that is not suitable for a single, continuous feedback controller. Switched-system control of IBVS and PBVS systems offer the opportunity to use vision data in the closed loop control of a nonholonomic system. We present such a …
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Using Stranded Assets Analysis to Inform Distributed Incremental System Design
… the choices they make impact the overall market system of their product. The product investigated is electrical power, which exists in a networked system of ten bus managers. These managers are given a choice of when to replace the electrical power generators on their busses to affect the …
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Policies and Mechanisms for Networked Control Systems
"The second mechanism we present is a ""Message Dispatcher"" (MD) layer for information dissemination in wireless vehicle-to-vehicle communication. The MD enables efficient and flexible transmission of data elements between vehicles. It has been implemented in several vehicles at Toyota, and has …
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Entropy Based Framework for Static and Dynamic Coverage and Clustering Problems
In this work, we consider the static and dynamic resource allocation, coverage and clustering problems, and propose a mathematical framework for formulating and solving such problems. The underlying combinatorial optimization problems are solved in a Maximum Entropy Principle (MEP) based framework. …
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Safe Control and Coordination of Multiple Autonomous Vehicles
… tracking problem and considers overall system stability and safety issues by incorporating elements from hybrid system automata, multiple Lyapunov functions, and modified avoidance functions related to avoidance control. Finally, a novel model predictive control coordination scheme for …
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Robust Repetitive Control and Its Application
… TPRRC as well as most other repetitive control systems typically takes one period (of the periodic exogenous signal) to converge. A feedforward control is proposed and shown to increase the transient convergence rate for the TPRRC when switching from one data track to another.
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