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 “"Exponential Model"”.
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Model-based myelin water fraction mapping: analyses and improvement
In this thesis, the problem of model-based myelin water fraction (MWF) mapping is addressed. We first focus on three of the most widely used signal models for T2*-myelin water imaging (MWI), i.e., the NNLS-multi-exponential model, the magnitude-3-exponential model, and the complex-3-exponential …
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Mathematical model of the sprint relay race.
… was to develop and validate mathematical models of the sprint relay race. Two approaches, a classical exponential approach and a "new" polynomial approach, were chosen for implementation. Archival film of a 100 m sprint was used to gather displacement data for the first 60 m of the race. …
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Beran Estimation of the Fisher-Bingham and Curved Kent Distributions
… been developed for data over S^(p-1). A general exponential model which embodies some classical distributions as special cases has been proposed in high dimensions and is the subject of this dissertation. We describe the relationship between this general exponential model and the generalized form …
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Day-to-Day Variation in the Feed Consumption of Dairy Cows in Early Lactation
… Individual cow daily DMI data were fitted to the exponential model. There was no effect of treatment on these variables or the fractional rates of increase in DMI. Multiple regression analysis suggested that more body weight was mobilized per unit increase in 3.5% fat-corrected milk in cows fed …
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A Normal Truncated Skewed-Laplace Model in Stochastic Frontier Analysis
… is an exciting method of economic production modeling that is relevant to hospitals, stock markets, manufacturing factories, and services. In this paper, we create a new model using the normal distribution and truncated skew-Laplace distribution, namely the normal-truncated skew-Laplace model. …
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A Comparison of Deterministic and Stochastic Population Models
In this thesis, the author considers the exponential and the predator-prey population models. A comparison of the deterministic and stochastic versions of each is made. The author shows that on average a stochastic model is precisely its corresponding deterministic model. The first model considered …
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Computer simulation and analysis of production line with two unreliable full batch machines and a finite buffer
… computer simulations of deterministic and exponential models of a production line with full-batch processing and a finite buffer in order to validate the theoretical models already developed, and to gain more insight to the production line behavior through the simulations. The steady-state …
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A Comparison of Nonlinear Filters for Orbit Determination and Estimation (Satellite)
… through J(,44). The atmospheric density model used is an exponential model that includes diurnal variations and variations in the decimeter solar flux. The observations used to update the state vector estimates are slant range, azimuth, and elevation relative to a radar site.
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Oxygen Uptake Kinetics in Severe Intensity Exercise
… to elicit fatigue in ~3 to 10 min. A simple mono-exponential model effectively described the response across all intensities. There was a positive correlation between the response time and the time to fatigue, demonstrating that the maximal oxygen uptake was achieved faster at higher intensities …
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Spatial variability of soil biological and chemical indicators in selected soils in South Africa
… showed that most parameters were analysed by exponential model except for acid phosphatase and organic carbon that fitted into Gaussian models in University of Venda Experimental Farm. Spatial dependence of the soil respiration, cellulases and organic carbon have strong spatial dependence with …
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Modeling the winning seed distribution of the NCAA basketball tournament
… of interest in proposing mathematical methods to model the tournament's results and pick the winners of future games. This thesis analyzes the results of the NCAA basketball tournament since 1985 and proposes several models to capture the winning seed distribution in each round. The Exponential …
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An experimental investigation of the static coefficient of friction for sheetpile interlocks
… of friction was found to be nonlinear. An exponential model to predict the coefficient of friction for interlock loads between 1 and 5 kips per inch was developed. To study the effects of cyclic displacements on interlock friction the specimen interlocks were displaced approximately one …
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A transient heat probe sensor for measuring transpiration in the stem of woody plants.
… the system can not be analysed as a first order model. Non-linear regression analysis showed that the relationship between the probe sensor temperature response and the time elapsed from the beginning of cooling phase is adequately fitted by an additive exponential model. A dimensionless heat …
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Detection power, temporal response, and spatial resolution of IRON fMRI in awake, behaving monkeys at 3 Tesla
… of neuroimaging within this important animal model. The injection of the iron oxide contrast agent (MION) provided a 9-fold increase in efficiency for block designs relatively to BOLD contrast. Because the hemodynamic response function acts as a low-pass filter on neural activation to …
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Simulation of deep-bed drying of Virginia peanuts to minimize energy use
A deep-bed drying model simulating the drying of peanuts in a fixed bed is required for designing energy-efficient and automatically controlled dryers. A deep-bed drying model consists of a thin-layer drying model to calculate the moisture release from the material and a set of mass and energy …
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Experimental design issues in impaired reproduction applications
… surface design criteria are applied to four models for impaired reproduction data. The important role of control observations in impairment studies is discussed, and for one model, a normal error linear model, a design criterion is introduced for allocating a portion of the sample to the …
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Parametric survival models with interval censored data in determining prognostic factors of patients of lung cancer
… time of parametric distribution of Weibull, exponential and log-logistic were derived by using the inverse cumulative distribution function with the hazard and survival function. Standard estimation values such as, the mean square error (MSE), root mean square error (RMSE), mean absolute …
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Optimal Experimental Design for Poisson Impaired Reproduction Studies
… of design optimality methods to the k-regressor model. The standard Poisson model with log link is used. Bayesian designs with priors on the parameters are explored using both the D and F-optimality criteria for the single regressor Poisson exponential model. Since these designs are found via …
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Study of the time-dependent rheological behaviour of lead-free solder pastes and flux mediums used for flip-chip assembly applications
… in this thesis on the characterisation and modelling of time-dependent rheological behaviour of solder paste and flux mediums used in surface mount applications is made up of four main parts. The first part concerns the characterisation of the time-dependent behaviour of solder pastes and …
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Effects of Hydrologic Gradients on Woody Debris Breakdown and Macroinvertebrate Colonization in a Cumberland Plateau Watershed, Eastern Kentucky, U.S.A.
… and ash free dry mass loss followed a negative exponential model (p < 0.05), there wasn’t a significant between-channel difference in mass loss rates (p > 0.05). Breakdown rates (-k) ranged from 0.133 – 0.194year-1 for perennial streams compared to 0.103 – 0.170year-1 in the temporary streams. …
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