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 57 for “"Inverse method"”.
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INVERSE METHOD FOR DETERMINING TEMPERATURE DISTRIBUTION IN MACHINING
… and the workpiece. The present problem is an inverse heat conduction problem which is much more difficult to solve than the direct one due to its ill-posed nature, that is, small changes in the measured interior temperatures will result in big errors in the estimated boundary temperatures. The …
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Shape optimization of cambered airfoils using a genetic algorithm and a multipoint inverse method
… MATLAB genetic algorithm (GA) and a multipoint inverse method called PROFOIL. XFOIL was used to evaluate the aerodynamic performance of each airfoil. Data processing techniques and a custom penalty function were developed in order to overcome challenges in integrating these tools. The viability …
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Deducing trace gas emissions using an inverse method in three-dimensional chemical transport models
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Experience of light : the use of an inverse method and a genetic algorithm in daylight design
… proposing a new solution, success factors and methodology have been identified. There are many problems-solving techniques associated with design and delivery systems. Most popular techniques are forward methods and typically employed "trial and error" processes, attacking problems on the front …
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An inverse method for obtaining the attenuation profile and small variations in the sound speed and density profiles of the ocean bottom
… and density as a function of depth. An inverse method based on a perturbation technique is presented in this thesis for the determination of these parameters. A monochromatic source experiment is proposed because of the desirability of such an experiment for determining the acoustic …
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An inverse method for obtaining the attenuation profile and small variations in the sound speed and density profiles of the ocean bottom
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1985.
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On finding confidence intervals for the inverse regression method of linear calibration
… y for a given value of x and solving for x. The Inverse estimator is gotten by expressing the linear model as x<sub>i</sub> = γ + δy<sub>i</sub> + ε<sub>i̇</sub> and using the resulting least squares estimator to estimate x. The purpose of this dissertation is to find confidence intervals for the …
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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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Gravity, capillary and dilational wave mode resonance at a visco-elastic two-fluid interface
… the experimental results. We tested this method on noisy simulated data sets and then applied it to published experimental data sets. We designed an experimental set-up to measure wave number, spatial damping coefficient, and wave slope data for a 3-10 hertz frequency range of transverse …
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Solution of St.-Venant's and Almansi-Michell's Problems
We use the semi-inverse method to solve a St. Venant and an Almansi-Michell problem for a prismatic body made of a homogeneous and isotropic elastic material that is stress free in the reference configuration. In the St. Venant problem, only the end faces of the prismatic body are loaded by a set …
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A method for propulsion nozzle design
An inverse method for the design of exhaust nozzles with a specified transonic pressure distribution is presented. A problem of mixed Neumann and Dirichlet boundary condition is solved. A successive line relaxation process is used to solve the array of velocity potentials in the entire flow field. …
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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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Mathematical modelling of the base metal matte converter
… The mathematical model utilises the matrix - inverse method that is used to solve the matrix representing a system of several linear equations to give the values of unknown variables. The mathematical matrix - inverse method provides us with the tool to solve many large linear equations …
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HEAT TRANSFER IN SQUEEZE CASTING OF LIGHT ALLOYS
… transfer coefficients were determined using the inverse method. By observing the IHTC versus time curve profiles, the IHTC peak values of each step were found to increase accordingly as the applied pressure increased. In comparison with the thinner steps, the relatively thicker steps attained …
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Application of viscous-inviscid interaction methods to transonic turbulent flows
… using a transpiration velocity. In the semi-inverse interaction method, the viscous and inviscid equations are solved in an explicitly separate manner and the displacement thickness is iteratively updated by a simple coupling algorithm. In the simultaneous interaction method, local solutions …
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Model systems for the investigation of metal-support interactions in cobalt based Fischer-Tropsch
… independent of other support effects, the inverse method was used in the synthesis of model catalysts [3]. The inverse method mimics the interface bond between the support and the active metal, resulting in CoO-Si bond formation. By exposing Co nanoparticles (NPs) to a dilute solution of an …
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Trailing Edge Flow Conditions as a Factor in Airfoil Design
… of single-element airfoils using potential flow methods are presented. In particular, the role played by the non-dimensional trailing edge velocity in design is considered and the relationship between the specified value and the resulting airfoil geometry is explored. In addition, the …
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Application of the method of integral-relations to supersonic and hypersonic flow past paraboloids of revolution
… first approximation of the integral-relations method, which considers the entire shock layer as a single strip, is derived for axisymmetric bodies of arbitrary smooth contour. The resulting differential equations were then applied to a supersonic and hypersonic flow past a paraboloid of …
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A Meshless Approach to Computational Pharmacokinetics
<p>The meshless method is an incredibly powerful technique for solving a variety of problems with unparalleled accuracy and efficiency. The pharmacokinetic problem of transdermal drug delivery (TDDD) is one such topic and is of significant complexity. The locally collocated meshless method (LCMM) …
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The Design and Implementation of a GUI-Based Control Allocation Toolbox in the MATLAB Environment
… Generally speaking, control allocation is any method that is used to determine how the controls of a system should be positioned to achieve some desired effect. An infinite number of allocation methods exist, from the straight-forward direct allocation technique, to the daisy chaining approach, …
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