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.
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Showing 1 to 20 of 49 for “"inverse methods"”.
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Combining altimetry and hydrography with inverse methods
We describe a generalization of the Bernoulli inverse method, which produces an estimate of Sea Surface Height (SSH) across the region of interest rather than simply at station positions. Real-time ‘float’ observations and satellite altimetry measurements are used to map a ‘sea surface elevation’ …
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Inverse methods in quantum many-body physics
… In this thesis, we explore an alternative ""inverse"" approach to the problem, where we find models from properties, and show how inverse methods and related tools can be used to efficiently study topological and MBL physics in a new way. In Chapter 1, we introduce the theoretical background …
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Inverse methods for sound speed estimation in the ocean
… discusses a fast approach for solving the inverse problem of estimating sediment sound-speed based on the Deift-Trubowitz trace formula. Under certain assumptions, this algorithm can recover the sound speed profile in the seabed using pressure field measurements in the water column at low …
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Inverse Methods for Fast Field Cycling and NMR Correlation Experiments
This thesis focuses on the development of inverse methods for nuclear magnetic res- onance (NMR) correlation or exchange experiments and new fast field cycling (FFC) modelling approaches. Moreover, the theoretical framework to consider fast field cycling as an inverse problem is provided and the …
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The application of inverse methods to problems in ocean circulation
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1980.
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Inverse methods and results from the 1981 Ocean Acoustic Tomography Experiment
Ocean acoustic tomography was proposed in 1978 by Munk and Wunsch as a possible technique for monitoring the evolution of temperature, density, and current fields over large regions. In 1981, the Ocean Tomography Group deployed four 224 Hz acoustic sources and five receivers in an array which fit …
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Development of inverse methods for reconstruction of flight environments on ablators
… temperature response, but an ill-posed inverse heat conduction problem must be solved to reconstruct the surface heating environment from the embedded thermocouple measurements. The material properties of typical ablators make the reconstruction process more challenging when the …
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Inverse methods and results from the 1981 Ocean Acoustic Tomography Experiment
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1983.
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A comparison of the classical and inverse methods of calibration in regression
… calibration problem, frequently referred to as inverse regression or the discrimination problem can be stated briefly as the problem of estimating the independent variable x in a regression situation for a measured value of the dependent variable y. The literature on this problem deals primarily …
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Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods
Inverse methods are applied to historical hydrographic data to address two aspects of the general circulation of the Atlantic Ocean. The method allows conservation statements for mass and other properties, along with a variety of other constraints, to be combined in a dynamically consistent way to …
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Mass, heat and nutrient fluxes in the Atlantic Ocean determined by inverse methods
Inverse methods are applied to historical hydrographic data to address two aspects of the general circulation of the Atlantic Ocean. The method allows conservation statements for mass and other properties, along with a variety of other constraints, to be combined in a dynamically consistent way to …
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Investigation of a stochastic solute transport model and development of inverse methods in hydrogeology
… model. In the second part, two types of inverse methods are developed to solve the inverse problem in stochastic contaminant transport modelling of saturated porous media in heterogeneous aquifers. In the first part, a one-dimensional stochastic solute transport model (SSTM) is …
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Efficient inverse methods for supersonic and hypersonic body design, with low wave drag analysis
… supersonic and hypersonic flight vehicles, new inverse Euler methods are developed in these flow regimes where a space marching numerical technique is valid. In order to get a general understanding for the specification of target pressure distributions, a study of minimum drag body shapes was …
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Inverse methods to estimate anthocyanin degradation kinetic parameters in cherry pomace during non-isothermal heating
… time, whereas Browning Index (BI) exhibited an inverse trend. Correlation between ACY and red color showed a linear relationship at higher moisture content (70 MC, wb) of cherry pomace. Oxygen radical absorbance capacity (ORAC) method showed stability during heating at different …
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Computational ligand design and analysis in protein complexes using inverse methods, combinatorial search, and accurate solvation modeling
… peptides that bind to protein targets. First, an inverse small-molecule design algorithm is presented that can explore the space of ligands compatible with binding to a target protein using fast combinatorial search methods. The inverse design method was applied to design inhibitors of HIV-1 …
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Using linear inverse methods and finite element models to explore sensitivity to homogeneous elastic half-space assumptions in deformation models of the 2000 eruption of Hekla volcano, Iceland
… 2011). These data present the opportunity to use inverse methods to estimate parameters describing the behavior of the eruptive fissure (Fukushima et al., 2010, Anderson and Segall, 2011, Ofeigsson et al., 2011). I use the 2000 eruption of Hekla as an example in linear inversions that investigate …
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Finite element modeling of transient ultrasonic waves in linear viscoelastic media
… method serves as a test bed for studying three inverse methods for recovering time dependent longitudinal moduli from pulsed ultrasonic waves transmitted through a slab of viscoelastic material with properties known a priori. Specifically, two existing inverse methods called propagator methods, …
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Hybrid Methods for Inverse Aerodynamic Design
… approach has been applied to the development of inverse methods for the design of (1) multi-element airfoils for multipoint velocity and boundary-layer prescriptions and (2) airfoils to obtain desired multipoint velocity distributions on three-dimensional wings and complex juncture regions. These …
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Efficient representation of the hydrographic structure of the north Atlantic Ocean and aspects of the circulation from objective methods
… and informative. The second is application of inverse methods to the data to determine ocean circulation. Both subjects are examined in the North Atlantic Ocean. The efficient representation is examined in terms of empirical orthogonal functions (EOFs) among the variations in vertical …
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