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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 143 for “"curve fitting"”.
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Automatic Curve Fitting for Interactive Display
Made available in DSpace on 2014-12-13T18:01:43Z (GMT). No. of bitstreams: 1 7606723.pdf: 2619307 bytes, checksum: fb7c94f96fa1b98eebe05aee228a6ab1 (MD5) Previous issue date: 1975
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Curve Fitting in Nmr Exchange Studies
Made available in DSpace on 2014-12-10T23:01:23Z (GMT). No. of bitstreams: 1 7219915.pdf: 2479771 bytes, checksum: bf5a1177c33ee1b07f017c882782d269 (MD5) Previous issue date: 1972
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Reflectance and Emission Spectroscopy: Curve Fitting Methods with Application to Impact Glasses and the Varying Grain Size of Planetary Analogue Minerals
… and a set of guidelines for empirically curve fitting spectra in a robust and repeatable manner. Chapter 2 and its appendices were conceived in an effort to provide the spectroscopic community with a set of curve fitting tools, to be put freely in the hands of spectroscopists in the hopes …
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Change Request Prediction and Effort Estimation in an Evolving Software System
… has been done in defect prediction using curve-fitting methods evolving software systems, with one or more change-points. Curve-fitting approaches have been successfully used to select a fitted reliability model among candidate models for defect prediction. This work demonstrates the use …
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Deformation correction in ultrasound imaging in an elastography framework
… Interpolation or extrapolation by polynomial curve fitting is then applied to each trajectory to estimate the image under a specified contact force. The performance of displacement estimation and polynomial curve fitting are analyzed in a simulation framework incorporating FEM and ultrasound …
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Analysis of Slug Tests to Determine Hydraulic Conductivity of Vertical Cutoff Walls
… One of the new methods involves a series of type curves that takes into account the compressibility of the backfill, overall effect of narrow wall boundaries, and eccentricity of the well intake section. The second new method is a modified curve fitting method, which employs a linear curve fitting …
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State Space Methods Using Biologically-Relevant Generative Models to Analyze Neural Signals
… be ill-informed by canonical frequency bands. Curve-fitting procedures have been developed to identify peaks in the power spectrum distinct from broadband noise. Unfortunately, these ad hoc methods are prone to overfitting and are difficult to interpret in the absence of generative models to …
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Behavior of low-frequency sound waves in porous media
… pea gravels, and glass spheres. A standing wave curve fitting algorithm was applied to data taken from a vertical impedance tube to determine the propagation and reflection parameters of the materials. Physical characteristics considered include porosity, tortuosity, and flow resistivity.
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Ambient vibration testing of concrete dams
… enhanced frequency domain decomposition (EFDD), curve fitting frequency domain decomposition (CFDD) and stochastic subspace identification (SSI) methods namely; unweighted principal component (UPC), principal component (PC) and canonical variant analysis (CVA)) have been applied to data from …
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Binary gas adsorption on molecular sieves. Experimental data for the adsorption of oxygen, nitrogen and oxygen-nitrogen mixtures on five molecular sieve adsorbents at various temperatures and pressures and a comparison with theoretical models.
… for temperatures of 278.15,293.15 and 303.15 K. Curve fitting of the pure canponent isotherms has been attempted using the kinetic model of Gonzalez and Holland, the vacancy solution model, the statistical thermodynamic model and a mathematical equation similar to the Hill-de Boer model. With the …
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Discretization Error Estimation and Exact Solution Generation Using the 2D Method of Nearby Problems
… solution to the original problem of interest, curve fitting the solution, and generating source terms by operating the governing PDEs upon the curve fit. Adding these source terms to the right-hand-side of the governing PDEs defines the nearby problem. In addition to its use for generating …
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Miniature Fiber-Optic Farby-Perot Interferometer: Fabrication, Data Processing and Temperature Sensing Application
… Fourier Transformation (FFT) with non-linear curve fitting of the entire spectrum. The new method successfully resolves the ambiguous problem for the direct fitting method and can provide higher resolution compared to the FFT method. Simulation on visibility shows that to achieve high …
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Theoretical and Experimental Study of Low-Finesse Extrinsic Fabry-Perot Interferometric Fiber Optic Sensors
… by the theory of SMF-EFPI sensors, a novel curve fitting signal processing method (Type 1 curve-fitting method) is presented for white-light SMF-EFPI sensor systems. Other spectral domain signal processing methods including the wavelength-tracking, the Type 2-3 curve fitting, Fourier …
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Study of creep characteristics of multi-layered corrugated fibre board protective cushions
… or stiffness and can be fitted to creep data. Curve fitting with a non-linear optimisation technique shows the model has a reasonable fit with experimental data. Creep data and curve fitting shows an unexpected trend in that as the humidity level is raised the creep strain levels reduce. The …
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Direct Simulation Methods for Multiple Changepoint Problems.
… our method on the problem of Bayesian curve fitting. The novelty of our model is that we fit a piecewise polynomial function and allow for both discontinuity and continuity at changepoints. This method is compared to existing Bayesian curve fitting method, and applied to the analysis of …
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Experimental Identification of Nonlinear Systems
… frequency-response function in a least-squares curve-fitting algorithm. The algorithm is improved by making use of experimentally known information about the location of the bifurcation points. The method is validated by using the parameters extracted to predict the force-response curves at …
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Ultra-Narrow Laser Linewidth Measurement
… by using the LC-RDSHI method. The non-linear curve fitting of Voigt lineshape to separate Lorentzian and Gaussian components was investigated. Voigt curve fitting results give us a clear view on laser frequency noises and laser linewidth nature. It is also shown that for a ultra-narrow …
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Identification of metal-organic framework materials for adsorptive separation of the rare gases: applicability of IAST and effects of inaccessible regions
… IAST calculations on these 70 materials, and the curve fitting problem in IAST was discussed. IAST calculations were confirmed with extensive binary GCMC calculations. For each binary separation, materials were identified with predicted performance that surpasses the state of the art. "Reverse …
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A Meta-Analysis and Risk Assessment of Heavy Metal Uptake in Common Garden Vegetables.
… meta-analysis (multiple-regression and nonlinear curve-fitting) and an upgrade in data reporting standards are recommended.</p>
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Examining the accuracy of the normal approximation to the poisson random variable
… a power function of the parameter; therefore, curve fitting is used to bound the error. Finally, variations on the approximation are examined; these variations are often more accurate than the standard approximation.</p>
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