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 87 for “"Fundamental Limitations"”.
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Fundamental limitations on plasma fusion systems not in thermodynamic equilibrium
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Fundamental limitations between noise and back-action in bio-molecular networks
In an interconnection of two components in a bio-molecular network, noise in the downstream component can be reduced by increasing the magnitude of the down-stream signal. However, this method of reducing noise increases the back-effect to the upstream system, called 'retroactivity', thereby …
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Frequency selective analog to digital converter design : optimality, fundamental limitations, and performance bounds
In this thesis, the problem of analysis and design of Analog to Digital Converters (ADCs) is studied within an optimal feedback control framework. A general ADC is modeled as a causal, discrete-time dynamical system with outputs taking values in a finite set. The performance measure is defined as …
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Advances in Risk Parity Portfolio Optimization
… its mathematical formulation imposes some fundamental limitations. This thesis aims to modernize risk parity by addressing all of the aforementioned issues. We address the susceptibility to estimation errors through three different frameworks. First, we introduce a robust framework that …
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Crosstalk and noise in division-of-focal-plane polarimeters and polarization imaging applications
… spatial crosstalk. This work develops the fundamental limitations of DoFP polarimeters due to noise and expands upon how spatial crosstalk affects the reconstruction of the Stokes parameters. Experimental data is presented confirming the presented mathematical model and further emphasizing …
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Design of nylon-carbon fiber composite gears
… manufacturing and material science have changed fundamental limitations of designs and have allowed designers to redesign components to improve performance characteristics. This work applies traditional gearing standards from the American Gear Manufacturers Association (AGMA) to a nylon-carbon …
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Stochastic Space-Charge in Projection Electron Lithography and High Resolution Transmission Electron Microscopy
… theories. Furthermore, design considerations and fundamental limitations for each technique are discussed. Lastly, future research directions are suggested.
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Computability, inference and modeling in probabilistic programming
… probability distributions and explore the fundamental limitations of using this class to describe and compute conditional distributions. In addition to proving the existence of noncomputable conditional distributions, and thus ruling out the possibility of generic probabilistic inference …
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Enhancement of electromagnetic propagation through complex media for Radio Frequency Identification
In this thesis, I present and examine the fundamental limitations involved in Radio Frequency Identification (RFID) as well as provide a means to improve reader-tag communication in ultra high frequency RFID systems. The ultimate goal in an RFID system is to maximize the communication link between …
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Integrated plant and control design for vehicle-environment interaction
… this is often not achievable due to fundamental limitations arising from the physical system design. This dissertation studies the fundamental limitations that stem from these physical systems and develops a systematic solution to alleviate the limitations. The results developed are …
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Trustworthy and scalable anonymous communication
… in existing P2P anonymity systems, and find fundamental limitations in their designs. Second, we propose novel protocols for P2P anonymous communication that can successfully overcome these limitations. Third, we describe a protocol for detecting malicious Sybil identities using information …
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Boiling on hierarchical nanoengineered surfaces
… non-scalable structures to study the fundamental limitations of boiling. Here, we developed a highly scalable, three-tier hierarchical surface deposition technique to investigate the pool boiling heat transfer performance with focus on the bubble departure diameter and frequency. …
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Thermophotovoltaics : shaping the flow of thermal radiation
… applications. In addition, we explore fundamental limitations of photonic crystal thermal emitters and provide new insights into the limiting power transfer mechanisms that are relevant for TPV, micro-TPV, lighting and sensor applications. Ideal thermodynamic models that capture …
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Moving fast : neural constraints in closed loop
… of fast movements during sensorimotor control is fundamentally limited by the biophysics of neural activity and the physiological dynamics of the muscles involved. Yet, the limiting factors and the corresponding tradeoffs have not been rigorously quantified. We use feedback control principles to …
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An information theoretic study of modeling and control of dynamical systems
This dissertation concerns fundamental performance limitation in control of nonlinear systems. It consists of three coherent, closely related studies where the unifying theme is the use of information theoretic tools to investigate modeling and control issues in dynamical systems. The first study …
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Boundary conditions for the solution of open-region electromagnetic scattering problems
… is discussed, which highlights the underlying fundamental limitations encountered in the derivation of highly accurate and local absorbing boundary conditions in analytical forms. Next, a methodology for deriving boundary conditions that are local but still represent an approximation of the …
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Providing quality of service over high speed electronic and optical switches
… links. In this thesis, we focus on a number of fundamental issues concerning the quality of service provided by electronic and optical switches. We discuss various mechanisms that enable the support of quality of service requirements. In particular, we explore fundamental limitations of current …
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Developing software for compressed imaging transcriptomics
… are just physically infeasible due to fundamental limitations on the throughput of current technologies. However, because nearly all biological data are highly structured and can be described in terms of relatively few components, it is not necessary to measure each data point …
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Bayesian Optimization of PCB-Embedded Electric-Field Grading Geometries for a 10 kV SiC MOSFET Power Module
… grading structure, providing insights into the fundamental limitations of the system. The characterization results are used to streamline the design and optimization of the bus bar and high-density module interface. The high-density interface experimentally demonstrated a partial discharge …
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