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 339 for “"Empirical model"”.
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Empirical model-based control for end milling process
… main objective of this research is to develop an empirical model-based control mechanism to maintain a fine surface finish quality by maintaining on-line cutting force values. The proposed model has been developed to present the control model constraints, by varying the machining parameters to …
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Highway Finance in the United States: An Empirical Model
This thesis seeks to construct an empirical model of highway finance in the United States, and in particular, to examine the relationship between highway-user revenues and highway spending. It provides a general overview of the current highway system, including the federal-aid highway program, and …
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An empirical model for predicting the feasibility of corporate turnaround
… The other objective was the development of an empirical model of the determinants of corporate turnaround feasibility capable of predicting the feasibility of corporate turnarounds. One hundred 'troubled companies ' were identified out of two hundred and eleven publicly listed companies of the …
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Experimental Analysis of Empirical Model for Friction and Wear in Rubber on Dry Concrete
… of this study is to discusses and analyze the empirical models of friction and wear in viscoelastic materials such as rubber by direct comparison with the experimental result and suggest possible ways of corrections and improvement. This study has great importance as we use rubber in various …
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Simulation of dynamic response of Self-Powered-Inconel-Neutron-Detector lead cables using a semi-empirical model
The work presented here was devoted to the modelling and simulation of the dynamic response of lead cables of Inconel self-powered neutron detectors in a CANDUpower reactor. The main goal was to develop a semi-empirical dynamic model of theInconel lead-cables in Ontario Power Generation’s …
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Using an empirical model of human turning motion to aid heading estimation in a personal navigation system
With the adoption of Global Navigation Satellite Systems in smart phones, soldier equipment, and emergency responder navigation systems users have realized the usefulness of low cost Personal Navigation Systems. The state-of-the-art Personal Navigation System is a unit that fuses information based …
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A new empirical model to predict stress intensity factor for double interacting surface cracks located in hollow cylinder
… loadings. Based on the analysis results, an empirical mathematical model was produced to predict the SIFs for double parallel cracks using the SIFs for a single crack, for thick and thin cylinders, separately. The empirical model was verified in terms of performance evaluation metrics, which …
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Use of Multi-Period Linear Programming in Planning: An Empirical Model for the Farm Sector of South Viet-Nam
Made available in DSpace on 2014-12-08T23:37:35Z (GMT). No. of bitstreams: 1 6604226.pdf: 6719282 bytes, checksum: 872d85277da19d1ecf45e6b8616f8615 (MD5) Previous issue date: 1965
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Creation of controlled polymer extrusion prediction methods in fused filament fabrication. An empirical model is presented for the prediction of geometric characteristics of polymer fused filament fabrication manufactured components
This thesis presents a model for the procedures of manufacturing Fused Filament Fabrication (FFF) components by calculating required process parameters using empirical equations. Such an empirical model has been required within the FFF field of research for a considerable amount of time and will …
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Performance Evaluation of Token Control Networks
… used in loop networks. An exact analytical and empirical model are developed for the cases where exhaustive service and non-exhaustive service disciplines are used, respectively. Accuracies in the values of average network access delay predicted by the empirical model and simpler approximation …
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Biological excess phosphorus removal in activated sludge systems
… To predict the P removal in these systems, an empirical model had been developed. In the empirical model, P removal was formulated in terms of some of the system parameters, such as anaerobic mass fraction, available readily biodegradable COD and active mass concentration. Organisms directly …
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The Interaction between Affect and Meta-cognition in Language Use : The Case of Foreign Language Anxiety.
… as conceptualised by Bachman and Palmer's (1996) model of language use. Anxiety is used to operationalize the concept of affect and develop an empirical model of interaction between meta-cognitive strategies, affect and language performance. The theoretical part examines the use of concepts of …
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Modelos empíricos para la estimación de la irradiancia solar ultravioleta
… clearness index and relative optical mass. The empirical model proposed in this work characterizes more than 95% of ultraviolet solar radiation variability in Badajoz, Cáceres and Plasencia.
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Gas assisted injection moulding: Experiment and simulation. Industrial machine experimental studies of the effect of process variables on gas bubble formation, and with simulation based upon a pseudo-concentration method.
… were measured and analysed, leading to an empirical model for wall thickness prediction. Gas delay time and injection velocity are shown to be most influential in controlling residual wall thickness. Simulation results are evaluated against the empirical model. The trends observed, for …
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Chitra: a visualization system to analyze the dynamics of parallel programs
… of program execution sequences, we develop an empirical model, a hybrid stochastic/deterministic model, that describes parallel program behavior. Chitra provides various clues and capabilities that assist in developing an empirical model to fit the observed program behavior. Developing …
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Characterisation and simulation of bidirectional multiphase flow in tubes
… in the literature of a generally accepted empirical correlation model that resolves the phenomenon of flow reversal and flooding in vertical tubes for gas / liquid flows with different fluids. Rather, experimental empirical model correlation developed so far relied on air/water flows. This …
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Preliminary framework for quantitative sustainable design of redox-mediated electrodialysis for biorefinery separations
… engineering industries are gaining interested in modeling redox-ED as it possible that modern advances in the novel layer-by-layer membrane technology can be economically and environmentally feasible when implemented in the downstream separations of fermentation-based processes. This work couples …
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Investigation into the discrepancies between computational fluid dynamics lift predictions and experimental results
… the over-prediction is insensitive to turbulence model details. Experimentation and computational fluid dynamics modeling show that discrete vortices are shed with significant sizes and distinct frequencies. These vortices are shown to result in significant cfd prediction errors when they are …
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Fade slope measurements and modeling in the Ku- and Ka-bands using the Olympus satellite
… results are discussed and the development of an empirical model derived from the Olympus fade slope statistics is detailed. The empirical model predicts fade slope occurrence as a function of fade slope for any frequency between 12 and 30 GHz.
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Improved predictions of contaminant transport in rivers
… contaminant transport in rivers, two analytical models and one empirical model were evaluated. Analytical solutions of the model of Reichert and Wanner (1991), which represents mixing in the advective zone by dividing the channel into a flowing zone and a stagnant zone, were developed for two …
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