subject:(Probability density function approach)

Technical University of Lisbon

1. Coloma, Eduardo Collado. Modelling height distribution on young cork oak plantations in Portugal.

Degree: 2016, Technical University of Lisbon

URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12939

►

Mestrado Mediterranean Forestry and Natural Resources Management (MEDfOR) - Instituto Superior de Agronomia - UL

Cork oak (Quercus suber L.) represents a crucial role on… (more)

Subjects/Keywords: total height distribution; Johnson's function; skewness; kurtosis; probability density function

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APA (6^th Edition):

Coloma, E. C. (2016). Modelling height distribution on young cork oak plantations in Portugal. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12939

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Coloma, Eduardo Collado. “Modelling height distribution on young cork oak plantations in Portugal.” 2016. Thesis, Technical University of Lisbon. Accessed January 21, 2021. http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12939.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Coloma, Eduardo Collado. “Modelling height distribution on young cork oak plantations in Portugal.” 2016. Web. 21 Jan 2021.

Vancouver:

Coloma EC. Modelling height distribution on young cork oak plantations in Portugal. [Internet] [Thesis]. Technical University of Lisbon; 2016. [cited 2021 Jan 21]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12939.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Coloma EC. Modelling height distribution on young cork oak plantations in Portugal. [Thesis]. Technical University of Lisbon; 2016. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12939

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Notre Dame

2. Travis L. Turnbull. The Spatial Distribution of Fatigue Microdamage Accumulation in Cortical Bone and Factors Influencing Fracture Risk</h1>.

Degree: Aerospace and Mechanical Engineering, 2013, University of Notre Dame

URL: https://curate.nd.edu/show/5q47rn31z6g

► Human cortical bone, like many engineering materials, exhibits damage and fracture, due to cyclic loading and overloading, such as that experienced by the load-bearing… (more)

▼ Human cortical bone, like many engineering materials, exhibits damage and fracture, due to cyclic loading and overloading, such as that experienced by the load-bearing long bones. Unlike engineering materials, bone possesses a unique ability to repair damage and reduce fracture risk. However, in cases such as athletes and military recruits, the rate and extent of damage formation can exceed the rate of repair, resulting in increased fracture risk until the damage is diagnosed and rest prescribed. In the elderly, and especially those afflicted with metabolic bone diseases such as osteoporosis, the rate of bone resorption exceeds the rate of formation of new bone, resulting in reduced cortical thickness, increased intracortical porosity and, thus, increased fracture risk. The overall objective of this project was to nondestructively investigate the spatial distribution of fatigue microdamage accumulation in cortical bone and factors that, upon interaction with microdamage, influence fracture susceptibility. Contrast-enhanced micro-CT detected increased microdamage in whole rat femora loaded in cyclic three-point bending relative to non-loaded controls, as well as the volumetric spatial distribution of microdamage relative to the whole bone morphology and non-uniform strain distribution resulting from bending. Spatial correlations between intracortical porosity, elevated mineralization, and fatigue microdamage were investigated by combining, for the first time, sequential, nondestructive, three-dimensional micro-CT measurements of each in cortical bone specimens subjected to cyclic loading followed by an overload to fracture. Microdamage at the fracture initiation site was found to be spatially correlated with intracortical porosity, but not highly mineralized tissue. The new spatial correlation methods were subsequently utilized to investigate the effects of age and loading mode on the fracture susceptibility of human cortical bone specimens. Interestingly, the influence of porosity on the initiation and propagation of microdamage was decreased in elderly (i.e., greater than 80 y/o) versus postmenopausal women donors. The observed spatial correlation between intracortical porosity and microdamage motivated future work exploring statistical predictions of fracture susceptibility based on spatial measurements of intracortical porosity, for example pore area, which predicted fracture susceptibility in a preliminary specimen cohort. Advisors/Committee Members: Dr. Matthew Ravosa, Committee Member, Dr. Diane Wagner, Committee Member, Dr. Glen Niebur, Committee Member, Dr. Ryan Roeder, Committee Chair.

Subjects/Keywords: matlab; probability density function; two-point correlation function; computed tomography

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APA (6^th Edition):

Turnbull, T. L. (2013). The Spatial Distribution of Fatigue Microdamage Accumulation in Cortical Bone and Factors Influencing Fracture Risk</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/5q47rn31z6g

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Turnbull, Travis L.. “The Spatial Distribution of Fatigue Microdamage Accumulation in Cortical Bone and Factors Influencing Fracture Risk</h1>.” 2013. Thesis, University of Notre Dame. Accessed January 21, 2021. https://curate.nd.edu/show/5q47rn31z6g.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Turnbull, Travis L.. “The Spatial Distribution of Fatigue Microdamage Accumulation in Cortical Bone and Factors Influencing Fracture Risk</h1>.” 2013. Web. 21 Jan 2021.

Vancouver:

Turnbull TL. The Spatial Distribution of Fatigue Microdamage Accumulation in Cortical Bone and Factors Influencing Fracture Risk</h1>. [Internet] [Thesis]. University of Notre Dame; 2013. [cited 2021 Jan 21]. Available from: https://curate.nd.edu/show/5q47rn31z6g.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Turnbull TL. The Spatial Distribution of Fatigue Microdamage Accumulation in Cortical Bone and Factors Influencing Fracture Risk</h1>. [Thesis]. University of Notre Dame; 2013. Available from: https://curate.nd.edu/show/5q47rn31z6g

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Colorado

3. Satkauskas, Ignas V. Numerical Calculus of Probability Density Functions.

Degree: PhD, Applied Mathematics, 2017, University of Colorado

URL: https://scholar.colorado.edu/appm_gradetds/93

► In this thesis we construct novel functional representations for the Probability Density Functions (PDFs) of random variables and develop efficient and accurate algorithms for… (more)

▼ In this thesis we construct novel functional representations for the Probability Density Functions (PDFs) of random variables and develop efficient and accurate algorithms for computing the PDFs of their sums, products and quotients, again in the same representation. We consider two important cases of random variables: non-negative random variables and random variables taking both positive and negative values. For the first case, we use approximations by decaying exponentials with complex exponents, while for the second case we develop a Gaussian-based multiresolution analysis (GMRA). The need to represent distributions of products and quotients of random variables appear in many areas of theoretical and applied sciences. However, there are currently only limited number of numerical techniques for computing such products and quotients and this thesis presents new numerical methods for this purpose. Current methods for computing the product and quotients typically rely on a Monte Carlo type approach, where the PDFs of the product or quotient are sampled individually and the histogram of the resulting PDF is obtained from computed products or quotients of the individual samples. Although Monte Carlo methods are easy to implement, they suffer from slow convergence and therefore are not well suited for achieving high accuracy. Another method for computing the PDFs of the products and ratios of positive independent random variables relies on the Mellin transform and we describe such methods in greater detail in the thesis. Although mathematically appealing, techniques based on the Mellin transform lack in robust and stable numerical algorithms for computation of the inverse Mellin transform, hence making them not universally applicable. Our novel representations and associated numerical algorithms produce a general framework for computing of PDFs of random variables which we call numerical calculus of PDFs in functional form. The new fast algorithms of this thesis allow user to select computational accuracy; the speed of algorithms only weakly depends on such selection. We demonstrate the performance of new algorithms on multiple examples using accuracies that are well beyond the reach of Monte Carlo based methods. Advisors/Committee Members: Gregory Beylkin, Alireza Doostan, Michael Sprague, Bengt Fornberg, Keith Julien.

Subjects/Keywords: multiresolution analysis; probability density function; product of random variables; Applied Mathematics; Probability

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APA (6^th Edition):

Satkauskas, I. V. (2017). Numerical Calculus of Probability Density Functions. (Doctoral Dissertation). University of Colorado. Retrieved from https://scholar.colorado.edu/appm_gradetds/93

Chicago Manual of Style (16^th Edition):

Satkauskas, Ignas V. “Numerical Calculus of Probability Density Functions.” 2017. Doctoral Dissertation, University of Colorado. Accessed January 21, 2021. https://scholar.colorado.edu/appm_gradetds/93.

MLA Handbook (7^th Edition):

Satkauskas, Ignas V. “Numerical Calculus of Probability Density Functions.” 2017. Web. 21 Jan 2021.

Vancouver:

Satkauskas IV. Numerical Calculus of Probability Density Functions. [Internet] [Doctoral dissertation]. University of Colorado; 2017. [cited 2021 Jan 21]. Available from: https://scholar.colorado.edu/appm_gradetds/93.

Council of Science Editors:

Satkauskas IV. Numerical Calculus of Probability Density Functions. [Doctoral Dissertation]. University of Colorado; 2017. Available from: https://scholar.colorado.edu/appm_gradetds/93

University of South Florida

4. Pokhrel, Keshav Prasad. Statistical Analysis and Modeling of Brain Tumor Data: Histology and Regional Effects.

Degree: 2013, University of South Florida

URL: https://scholarcommons.usf.edu/etd/4746

► Comprehensive statistical models for non-normally distributed cancerous tumor sizes are of prime importance in epidemiological studies, whereas a long term forecasting models can facilitate in… (more)

Subjects/Keywords: brain tumor; functional; mortality; probability density function; quantile; Epidemiology; Statistics and Probability

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APA (6^th Edition):

Pokhrel, K. P. (2013). Statistical Analysis and Modeling of Brain Tumor Data: Histology and Regional Effects. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/4746

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Pokhrel, Keshav Prasad. “Statistical Analysis and Modeling of Brain Tumor Data: Histology and Regional Effects.” 2013. Thesis, University of South Florida. Accessed January 21, 2021. https://scholarcommons.usf.edu/etd/4746.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Pokhrel, Keshav Prasad. “Statistical Analysis and Modeling of Brain Tumor Data: Histology and Regional Effects.” 2013. Web. 21 Jan 2021.

Vancouver:

Pokhrel KP. Statistical Analysis and Modeling of Brain Tumor Data: Histology and Regional Effects. [Internet] [Thesis]. University of South Florida; 2013. [cited 2021 Jan 21]. Available from: https://scholarcommons.usf.edu/etd/4746.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Pokhrel KP. Statistical Analysis and Modeling of Brain Tumor Data: Histology and Regional Effects. [Thesis]. University of South Florida; 2013. Available from: https://scholarcommons.usf.edu/etd/4746

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cornell University

5. Rowinski, David. Calculations Of Turbulent Reacting Flows Using Pdf Methods.

Degree: PhD, Mechanical Engineering, 2013, Cornell University

URL: http://hdl.handle.net/1813/33840

► This work presents applications of the probability density function (PDF) method to several recently-developed turbulent flows, and the implementation and assessment of several sub-models. A… (more)

▼ This work presents applications of the probability density function (PDF) method to several recently-developed turbulent flows, and the implementation and assessment of several sub-models. A series of lean piloted premixed jet flames (in order of lowest to highest jet bulk velocity: PM1-50, PM1-100, PM1150, and PM1-200) is first studied using a Reynolds-Averaged Navier-Stokes (RANS) based PDF method. These calculations use diagnostic testing and thorough parametric studies of models to show that the standard models overpredict the reaction rate in the flames PM1-150 and PM1-200. The nature of the combustion in these flames is examined through comparison to simpler combustion models, and it is found to be similar to laminar non-premixed flames. These same flames are then investigated further using both RANS-PDF and the recently developed Large Eddy Simulation (LES) PDF method. Simple models for molecular diffusion and combustion are tested and implemented in the RANS-PDF calculations. In the LES-PDF calculations, the effects of differential diffusion and the mixing model constant, C M , are both examined, and the calculations are found to be very sensitive to the value of C M . This study yields substantially improved calculations of all the flames. In particular, the study of C M shows strong evidence that larger values of C M are necessary for flames PM1-150 and PM1-200. The modeling of molecular mixing is investigated further through a study of a non-reacting turbulent jet flow with three inflowing streams. This study presents the unique opportunity to compare the scalar dissipation rate and conditional diffusion from the calculations to experimental data. In the RANS-PDF calculations of this flow, three classic mixing models are evaluated. The joint scalar PDF's are very sensitive to the choice of mixing model and show a wide variability from the measurements. Only the Euclidean Minimum Spanning Tree (EMST) produces compositions which lie very close to the slow manifold identified in the experimental work. LES calculations of the same flow are performed, and the dissipation rate and conditional diffusion are calculated. The resolved scalar dissipation rate is found to be in good agreement with the experimental data, but depends strongly on the resolution; the total dissipation rate from the RANS-PDF and LES calculations indicates significantly larger scalar dissipation rates than those measured experimentally. Lastly, LES-PDF calculations of the same flow yield joint-PDF's in very good agreement with the experimental data, and are far-improved from those of any mixing model studied with RANS-PDF. The attenuation of variance production model is introduced for LES-PDF and tested in this flow. This new model results in an additional dissipation of scalar variance and yields calculations of improved accuracy on coarse grids. Advisors/Committee Members: Pope, Stephen Bailey (chair), Diamessis, Peter J. (committee member), Bindel, David S. (committee member).

Subjects/Keywords: turbulent combustion; computational fluid dynamics; probability density function methods

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APA (6^th Edition):

Rowinski, D. (2013). Calculations Of Turbulent Reacting Flows Using Pdf Methods. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/33840

Chicago Manual of Style (16^th Edition):

Rowinski, David. “Calculations Of Turbulent Reacting Flows Using Pdf Methods.” 2013. Doctoral Dissertation, Cornell University. Accessed January 21, 2021. http://hdl.handle.net/1813/33840.

MLA Handbook (7^th Edition):

Rowinski, David. “Calculations Of Turbulent Reacting Flows Using Pdf Methods.” 2013. Web. 21 Jan 2021.

Vancouver:

Rowinski D. Calculations Of Turbulent Reacting Flows Using Pdf Methods. [Internet] [Doctoral dissertation]. Cornell University; 2013. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1813/33840.

Council of Science Editors:

Rowinski D. Calculations Of Turbulent Reacting Flows Using Pdf Methods. [Doctoral Dissertation]. Cornell University; 2013. Available from: http://hdl.handle.net/1813/33840

Penn State University

6. Zhang, Hedan. Effects of turbulence-chemistry interactions in direct-injection compression-ignition engines.

Degree: 2012, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/16172

► Advanced combustion strategies are emphasized in modern compression-ignition engine systems, aiming at improving diesel engine efficiency and reducing pollutant emissions, especially soot and NOx, together… (more)

▼ Advanced combustion strategies are emphasized in modern compression-ignition engine systems, aiming at improving diesel engine efficiency and reducing pollutant emissions, especially soot and NOx, together with strategies to accommodate unconventional fuels. Recent studies have shown the importance of turbulence and turbulence-chemistry interactions on emissions from laboratory flames and compression-ignition engines. Constant-volume, high-pressure spray combustion is an important intermediate step for model validation and scientific understanding of combustion in direct-injection compression-ignition engines. The Engine Combustion Network (ECN) provides a series of well-documented experimental data for spray combustion under typical diesel-engine conditions, and this serves as a good resource for simulation and validation purposes. Here simulations for the ECN constant-volume, n-heptane spray configuration have been performed using OpenFOAM, an object-oriented C++ based code. The effects of exhaust-gas recirculation (EGR), ambient temperature and density on combustion were investigated computationally. The simulations demonstrate that the CFD model is capable of predicting sprays, mixing, ignition and combustion, quantitatively, for engine-relevant conditions reasonably well. The numerical results show that the ignition delay and lift-off lengths are strongly influenced by EGR, ambient gas temperature and ambient gas density, in agreement with measurements. Results from a model using a transported probability density function (PDF) method that explicitly accounts for turbulence-chemistry interactions have been compared to those from a model that simplistically accounts for turbulence-chemistry interactions, including mixture fraction profiles, ignition delays, lift-off lengths and flame structures under various ambient conditions. Significant differences between these two models have been observed, whichshows the importance of turbulence-chemistry interactions. The turbulent flame structure predicted by the PDF method is more realistic than that obtained from a simplistic model to account for turbulence-chemistry interactions. The choice of chemical mechanism also plays a strong role. Next, the high-fidelity CFD-based models have been used to simulate fuel effects and complex interactions between turbulence and gas-phase chemistry on emissions for biodiesel combustion and hydrogen-assisted diesel combustion in common-rail diesel engines. The sensitivity of predicted NOx emissions to variations in the physical properties of the fuel (density and viscosity) has been explored to determine the origins of the so-called biodiesel-NOx effect: the increase in NOx emissions that has been observed when petroleum-based diesel fuel is replaced with biodiesel fuel. Interactions between turbulence and gas-phase chemistry have been found to be important in the fuel density effect on NOx emissions. CFD also has been used to explore the changes in NOx emissions with hydrogen substitution that have been observed experimentally in… Advisors/Committee Members: Daniel Connell Haworth, Dissertation Advisor/Co-Advisor, Daniel Connell Haworth, Committee Chair/Co-Chair, Stephen R Turns, Committee Member, James Gordon Brasseur, Committee Member, Andre Louis Boehman, Committee Member.

Subjects/Keywords: turbulence-chemistry interactions; probability density function; diesel engine; NOx; n-heptane

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APA (6^th Edition):

Zhang, H. (2012). Effects of turbulence-chemistry interactions in direct-injection compression-ignition engines. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/16172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Zhang, Hedan. “Effects of turbulence-chemistry interactions in direct-injection compression-ignition engines.” 2012. Thesis, Penn State University. Accessed January 21, 2021. https://submit-etda.libraries.psu.edu/catalog/16172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Zhang, Hedan. “Effects of turbulence-chemistry interactions in direct-injection compression-ignition engines.” 2012. Web. 21 Jan 2021.

Vancouver:

Zhang H. Effects of turbulence-chemistry interactions in direct-injection compression-ignition engines. [Internet] [Thesis]. Penn State University; 2012. [cited 2021 Jan 21]. Available from: https://submit-etda.libraries.psu.edu/catalog/16172.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Zhang H. Effects of turbulence-chemistry interactions in direct-injection compression-ignition engines. [Thesis]. Penn State University; 2012. Available from: https://submit-etda.libraries.psu.edu/catalog/16172

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Wisconsin – Milwaukee

7. Griffin, Brian Martin. Improving the Subgrid-Scale Representation of Hydrometeors and Microphysical Feedback Effects Using a Multivariate Pdf.

Degree: PhD, Mathematics, 2016, University of Wisconsin – Milwaukee

URL: https://dc.uwm.edu/etd/1144

► The subgrid-scale representation of hydrometeor fields is important for calculating microphysical process rates. In order to represent subgrid-scale variability, the Cloud Layers Unified By… (more)

▼ The subgrid-scale representation of hydrometeor fields is important for calculating microphysical process rates. In order to represent subgrid-scale variability, the Cloud Layers Unified By Binormals (CLUBB) parameterization uses a multivariate Probability Density Function (PDF). In addition to vertical velocity, temperature, and moisture fields, the PDF includes hydrometeor fields. Previously, each hydrometeor field was assumed to follow a multivariate single lognormal distribution. Now, in order to better represent the distribution of hydrometeors, two new multivariate PDFs are formulated and introduced in part one of this two-part project. The new PDFs represent hydrometeors using either a delta-lognormal or a delta-double-lognormal shape. The two new PDF distributions, plus the previous single lognormal shape, are compared to histograms of data taken from Large-Eddy Simulations (LES) of a precipitating cumulus case, a drizzling stratocumulus case, and a deep convective case. Finally, the warm microphysical process rates produced by the different hydrometeor PDFs are compared to the same process rates produced by the LES. Microphysics processes have feedback effects on moisture and heat content. Not only do these processes influence mean values, but also variability and fluxes of moisture and heat content. For example, evaporation of rain below cloud base may produce cold pools. This evaporative cooling may increase the variability in temperature in the below-cloud layer. Likewise, rain production in the moistest part of cloud tends to decrease variability in cloud water. These effects are usually not included in most coarse-resolution weather and climate models, or else are crudely parameterized. In part two of this two-part project, the microphysical effects on moisture and heat content are parameterized using the PDF method. This approach is based on predictive, horizontally-averaged equations for the variances, covariances, and fluxes of moisture and heat content. These higher-order moment equations contain microphysical source terms. Using a simple warm-rain microphysics scheme, the microphysics terms can be calculated by integrating analytically over the multivariate PDF. A LES of a precipitating cumulus case indicates that microphysical terms are dominant in some budgets. The analytic integrals for the microphysics terms are implemented in the CLUBB model. Interactive single-column simulations agree qualitatively with the LES. Advisors/Committee Members: Vincent E. Larson.

Subjects/Keywords: Hydrometeors; Integrals; Microphysics; Multivariate; Parameterization; Probability Density Function; Atmospheric Sciences

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APA (6^th Edition):

Griffin, B. M. (2016). Improving the Subgrid-Scale Representation of Hydrometeors and Microphysical Feedback Effects Using a Multivariate Pdf. (Doctoral Dissertation). University of Wisconsin – Milwaukee. Retrieved from https://dc.uwm.edu/etd/1144

Chicago Manual of Style (16^th Edition):

Griffin, Brian Martin. “Improving the Subgrid-Scale Representation of Hydrometeors and Microphysical Feedback Effects Using a Multivariate Pdf.” 2016. Doctoral Dissertation, University of Wisconsin – Milwaukee. Accessed January 21, 2021. https://dc.uwm.edu/etd/1144.

MLA Handbook (7^th Edition):

Griffin, Brian Martin. “Improving the Subgrid-Scale Representation of Hydrometeors and Microphysical Feedback Effects Using a Multivariate Pdf.” 2016. Web. 21 Jan 2021.

Vancouver:

Griffin BM. Improving the Subgrid-Scale Representation of Hydrometeors and Microphysical Feedback Effects Using a Multivariate Pdf. [Internet] [Doctoral dissertation]. University of Wisconsin – Milwaukee; 2016. [cited 2021 Jan 21]. Available from: https://dc.uwm.edu/etd/1144.

Council of Science Editors:

Griffin BM. Improving the Subgrid-Scale Representation of Hydrometeors and Microphysical Feedback Effects Using a Multivariate Pdf. [Doctoral Dissertation]. University of Wisconsin – Milwaukee; 2016. Available from: https://dc.uwm.edu/etd/1144

Louisiana State University

8. Ho, Vivian Mankau. Data-Driven Abstraction.

Degree: MSCS, Other Computer Engineering, 2017, Louisiana State University

URL: https://digitalcommons.lsu.edu/gradschool_theses/4339

► Given a program analysis problem that consists of a program and a property of interest, we use a data-driven approach to automatically construct a… (more)

Subjects/Keywords: Program Analysis; Abstraction; Machine Learning; Clustering; Probability Density Function

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APA (6^th Edition):

Ho, V. M. (2017). Data-Driven Abstraction. (Masters Thesis). Louisiana State University. Retrieved from https://digitalcommons.lsu.edu/gradschool_theses/4339

Chicago Manual of Style (16^th Edition):

Ho, Vivian Mankau. “Data-Driven Abstraction.” 2017. Masters Thesis, Louisiana State University. Accessed January 21, 2021. https://digitalcommons.lsu.edu/gradschool_theses/4339.

MLA Handbook (7^th Edition):

Ho, Vivian Mankau. “Data-Driven Abstraction.” 2017. Web. 21 Jan 2021.

Vancouver:

Ho VM. Data-Driven Abstraction. [Internet] [Masters thesis]. Louisiana State University; 2017. [cited 2021 Jan 21]. Available from: https://digitalcommons.lsu.edu/gradschool_theses/4339.

Council of Science Editors:

Ho VM. Data-Driven Abstraction. [Masters Thesis]. Louisiana State University; 2017. Available from: https://digitalcommons.lsu.edu/gradschool_theses/4339

University of New South Wales

9. Pei, Yuanjiang. Transported PDF Modelling of Spray Combustion at Practical Diesel Engine Conditions.

Degree: Photovoltaics & Renewable Energy Engineering, 2014, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/53545 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12240/SOURCE02?view=true

► The thesis considers computational modelling targeted at spray and combustion phenomena in diesel engines. Accurate predictions of these phenomena are needed to enable timely development… (more)

▼ The thesis considers computational modelling targeted at spray and combustion phenomena in diesel engines. Accurate predictions of these phenomena are needed to enable timely development of diesel engines having lower emissions and higher efficiency. However, the modelling required stands out as a grand challenge problem, involving coupled phenomena of high Weber number spray, high Reynolds number turbulence, and complex multi-step kinetics, and having multiple combustion modes and regimes occurring in a single flame.This thesis considers among the first attempts to model diesel spray combustion with the transported probability density function (TPDF) method. The TPDF approach has significant potential to become a useful tool in the automotive industry and address the above challenges. The principal advantage of the TPDF method is that the nonlinear chemical source term appears in closed form, which is expected to be an advantage for the treatment of finite rate chemical processes such as ignition and pollutant formation. Furthermore, it does not require different modelling to be applied between different combustion modes such as ignitions, premixed flames, and nonpremixed flames; and can also, in principle, treat both slow and fast chemistry limits. The TPDF method has been demonstrated, with considerable success, mostly for gaseous atmospheric pressure laboratory flames, but prior to this thesis, demonstration for spray flames at practical diesel engine conditions has been lacking.In this thesis:• The TPDF model is demonstrated and validated against experimental spray flame databases in ambient conditions representative of diesel engines - this being among the very first efforts to address this problem. The databases chosen were n-heptane and n-dodecane spray flames in constant volume and constant flow chambers, which were available through an international collaboration known as the Engine Combustion Network.• Choices for the sub-models involved are recommended, principally the molecular mixing and chemical kinetic models. Excellent results are demonstrated with the TPDF method given appropriate submodel choices.• The importance of considering interactions of turbulence and chemistry is assessed and found to be significant, particularly in less reactive conditions. This provides guidance on whether or not these interactions should be considered in modelling, and demonstrates how they affect modelling outcomes.• Basic physical and chemical characteristics of ignition and combustion of diesel spray flames are comprehensively investigated by a detailed analysis of the TPDF results. Several experimentally observed features are reproduced and/or explained, while other new features which have as yet not been observed experimentally are also noted. Advisors/Committee Members: Hawkes, Evatt, Photovoltaics & Renewable Energy Engineering, Faculty of Engineering, UNSW.

Subjects/Keywords: Engine Combustion Network; Transported probability density function; Diesel; Spray A

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APA (6^th Edition):

Pei, Y. (2014). Transported PDF Modelling of Spray Combustion at Practical Diesel Engine Conditions. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/53545 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12240/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Pei, Yuanjiang. “Transported PDF Modelling of Spray Combustion at Practical Diesel Engine Conditions.” 2014. Doctoral Dissertation, University of New South Wales. Accessed January 21, 2021. http://handle.unsw.edu.au/1959.4/53545 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12240/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Pei, Yuanjiang. “Transported PDF Modelling of Spray Combustion at Practical Diesel Engine Conditions.” 2014. Web. 21 Jan 2021.

Vancouver:

Pei Y. Transported PDF Modelling of Spray Combustion at Practical Diesel Engine Conditions. [Internet] [Doctoral dissertation]. University of New South Wales; 2014. [cited 2021 Jan 21]. Available from: http://handle.unsw.edu.au/1959.4/53545 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12240/SOURCE02?view=true.

Council of Science Editors:

Pei Y. Transported PDF Modelling of Spray Combustion at Practical Diesel Engine Conditions. [Doctoral Dissertation]. University of New South Wales; 2014. Available from: http://handle.unsw.edu.au/1959.4/53545 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:12240/SOURCE02?view=true

University of Illinois – Urbana-Champaign

10. Agarwal, Ravi. Solute transport in magnesium and their uncertainty quantification using density functional theory and green function approach.

Degree: PhD, Materials Science & Engr, 2018, University of Illinois – Urbana-Champaign

URL: http://hdl.handle.net/2142/101640

► Predictive control of alloy processing requires an accurate knowledge of the thermodynamic and the kinetic information of the system for microstructure simulation. Phenomena such as… (more)

▼ Predictive control of alloy processing requires an accurate knowledge of the thermodynamic and the kinetic information of the system for microstructure simulation. Phenomena such as solute segregation or growth of precipitates occur regularly during alloy processing which involves transport or diffusion of solutes. We investigate interstitial and vacancy-mediated solute transport in the hexagonal close-packed Mg. We utilize density functional theory calculations to determine the energies of interstitials and solute-vacancy configurations, which inform our diffusion model. The diffusion of light elemental solutes B, C, N, and O is investigated by determining their stable interstitial sites and the interpenetrating network formed by these sites. We employ the elastodiffusion tensor to determine the effect of strains on diffusion and find that B, C, and N diffusivity increases with volumetric crystal expansion, while O diffusivity decreases. The vacancy-mediated solute diffusion requires the jump network of vacancy near and away from the solute but the existing diffusion models oversimplify this jump network, severely affecting the accuracy of the transport coefficients. We identify all the symmetry-unique vacancy jumps in the Mg lattice and use our Green function approach to generate the transport database for 61 solutes. Our predictions of solute diffusion coefficients agree well with the available experimental measurements. We also study drag ratios which quantify the drag of solutes by vacancies, and the ring network topologies elucidate their mechanisms. We develop a Bayesian framework to quantify uncertainties in transport coefficients and use it to study uncertainties in transport coefficients due to approximate treatment of electronic exchange and correlation in DFT computed energies. Advisors/Committee Members: Trinkle, Dallas R. (advisor), Trinkle, Dallas R. (Committee Chair), Bellon, Pascal (committee member), Ertekin, Elif (committee member), Krogstad, Jessica A. (committee member).

Subjects/Keywords: Magnesium alloys; Diffusion; Green function approach; Density functional theory; Elastodiffusion; Kinetics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Agarwal, R. (2018). Solute transport in magnesium and their uncertainty quantification using density functional theory and green function approach. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/101640

Chicago Manual of Style (16^th Edition):

Agarwal, Ravi. “Solute transport in magnesium and their uncertainty quantification using density functional theory and green function approach.” 2018. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed January 21, 2021. http://hdl.handle.net/2142/101640.

MLA Handbook (7^th Edition):

Agarwal, Ravi. “Solute transport in magnesium and their uncertainty quantification using density functional theory and green function approach.” 2018. Web. 21 Jan 2021.

Vancouver:

Agarwal R. Solute transport in magnesium and their uncertainty quantification using density functional theory and green function approach. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2018. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/2142/101640.

Council of Science Editors:

Agarwal R. Solute transport in magnesium and their uncertainty quantification using density functional theory and green function approach. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2018. Available from: http://hdl.handle.net/2142/101640

Penn State University

11. Gupta, Ankur. Large-Eddy Simulation of Turbulent Flames with Radiation Heat Transfer .

Degree: 2011, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/12300

► Most practical combustion devices involve turbulent flow and operate at high temperatures. Reliable predictive models for these devices must not only represent each individual physical… (more)

▼ Most practical combustion devices involve turbulent flow and operate at high temperatures. Reliable predictive models for these devices must not only represent each individual physical process (combustion, turbulence and radiation) with high accuracy, but also must capture the highly nonlinear interactions among these processes. In this work, a comprehensive computational tool is developed for numerical modeling of turbulent combustion systems with accurate representation of turbulence, chemistry, turbulence-chemistry interaction (TCI), radiation, and turbulence-radiation interaction (TRI). A hybrid finite-volume (FV)/particle-Monte-Carlo procedure is employed wherein a compressible FV Large-Eddy simulation (LES) formulation with a composition filtered-density function (FDF) method is used to model turbulence-chemistry interactions (TCI) and emission TRI. Nongray radiation and absorption TRI is modeled through a photon Monte Carlo (PMC) method where stochastic schemes are developed for treating thermal radiation in a turbulent flow field characterized by the notional particles of the Lagrangian-FDF method. LES/FDF/PMC computations are computationally highly expensive, and a novel "computational time-map"-based domain-decomposition technique is implemented in this study for effective parallelization of the computational code. A nonpremixed methane/air flame is simulated to demonstrate the accuracy of the code developed here. Since LES is inherently time-dependent, the PMC solution at each time step needs to be reasonably reflective of the instantaneous fields to preserve the transient nature of LES, which might require considering large number of photon bundles. Investigations are made in this work for a wide range of flames to estimate the statistical uncertainties in the PMC solution for various number of photon bundles for an instantaneous LES/FDF snapshot. The time-averaged solution is also compared for different bundle sizes. The effect of thermal radiation appears as a source term in the energy equation, which consists of filtered emission and filtered absorption terms in the LES context. In LES, since only large scales are explicitly resolved, the contribution of subfilter-scale (SFS) fluctuations to filtered emission and absorption terms (referred to as SFS emission TRI and SFS absorption TRI, respectively) need to be modeled. The importance of SFS TRI is assessed here for a wide range of flames. A state-of-the-art, advanced LES-based numerical tool for comprehensive modeling of turbulent reacting flows, encompassing all key processes in detail, has become available for the first time as a result of this work. An effective parallelization scheme is implemented in the code that scales well irrespective of the computational cost for chemistry calculations. Stochastic PMC schemes are devised that are consistent with the notional particle representation of the FDF method. It is estimated that approximately three-to-four photon bundles per grid-cell are sufficient to ensure accurate time-averaged solutions for a… Advisors/Committee Members: Daniel Connell Haworth, Dissertation Advisor/Co-Advisor, Daniel Connell Haworth, Committee Chair/Co-Chair, Michael F Modest, Committee Chair/Co-Chair, Stephen R Turns, Committee Member, Philip John Morris, Committee Member.

Subjects/Keywords: Filtered-density function; Photon Monte Carlo; Turbulence-radiation interaction; Large-eddy simulation; Combustion; Thermal radiation; Turbulence-chemistry interaction; Probability density function

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gupta, A. (2011). Large-Eddy Simulation of Turbulent Flames with Radiation Heat Transfer . (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12300

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gupta, Ankur. “Large-Eddy Simulation of Turbulent Flames with Radiation Heat Transfer .” 2011. Thesis, Penn State University. Accessed January 21, 2021. https://submit-etda.libraries.psu.edu/catalog/12300.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gupta, Ankur. “Large-Eddy Simulation of Turbulent Flames with Radiation Heat Transfer .” 2011. Web. 21 Jan 2021.

Vancouver:

Gupta A. Large-Eddy Simulation of Turbulent Flames with Radiation Heat Transfer . [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Jan 21]. Available from: https://submit-etda.libraries.psu.edu/catalog/12300.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gupta A. Large-Eddy Simulation of Turbulent Flames with Radiation Heat Transfer . [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12300

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

East Tennessee State University

12. Forgo, Vincent Z, Mr. A Distribution of the First Order Statistic When the Sample Size is Random.

Degree: MS, Mathematical Sciences, 2017, East Tennessee State University

URL: https://dc.etsu.edu/etd/3181

► Statistical distributions also known as probability distributions are used to model a random experiment. Probability distributions consist of probability density functions (pdf) and cumulative… (more)

Subjects/Keywords: Minimum order statistics or first order statistics; Cumulative density function; Probability density function; Expectation; Variance; Percentile; Statistical Theory

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APA (6^th Edition):

Forgo, Vincent Z, M. (2017). A Distribution of the First Order Statistic When the Sample Size is Random. (Thesis). East Tennessee State University. Retrieved from https://dc.etsu.edu/etd/3181

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Forgo, Vincent Z, Mr. “A Distribution of the First Order Statistic When the Sample Size is Random.” 2017. Thesis, East Tennessee State University. Accessed January 21, 2021. https://dc.etsu.edu/etd/3181.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Forgo, Vincent Z, Mr. “A Distribution of the First Order Statistic When the Sample Size is Random.” 2017. Web. 21 Jan 2021.

Vancouver:

Forgo, Vincent Z M. A Distribution of the First Order Statistic When the Sample Size is Random. [Internet] [Thesis]. East Tennessee State University; 2017. [cited 2021 Jan 21]. Available from: https://dc.etsu.edu/etd/3181.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Forgo, Vincent Z M. A Distribution of the First Order Statistic When the Sample Size is Random. [Thesis]. East Tennessee State University; 2017. Available from: https://dc.etsu.edu/etd/3181

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Sardar Patel University

13. Jadhav, D.B. Some contributions to kiefer bound on variance;.

Degree: Statistics, 2014, Sardar Patel University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/36643

None newline

Reference given in the 126p.Appendix 132p.

Advisors/Committee Members: Shanubhogue, Ashok.

Subjects/Keywords: kiefer bound; parametric function; probability density

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APA (6^th Edition):

Jadhav, D. B. (2014). Some contributions to kiefer bound on variance;. (Thesis). Sardar Patel University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/36643

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Jadhav, D B. “Some contributions to kiefer bound on variance;.” 2014. Thesis, Sardar Patel University. Accessed January 21, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/36643.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Jadhav, D B. “Some contributions to kiefer bound on variance;.” 2014. Web. 21 Jan 2021.

Vancouver:

Jadhav DB. Some contributions to kiefer bound on variance;. [Internet] [Thesis]. Sardar Patel University; 2014. [cited 2021 Jan 21]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/36643.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Jadhav DB. Some contributions to kiefer bound on variance;. [Thesis]. Sardar Patel University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/36643

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Penn State University

14. Khilnani, Tapan Lalit. An Efficient Implementation Of Link Analysis Algorithm In High-Speed Interfaces for NRZ In The Presence Of CMOS Non-Linearity In Receivers.

Degree: 2015, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/27441

► Today's communication systems have achieved data rates in the range of multi-gigabits per second (Gb/s). With such an incessant escalation in data rates, design engineers… (more)

▼ Today's communication systems have achieved data rates in the range of multi-gigabits per second (Gb/s). With such an incessant escalation in data rates, design engineers are working hard to maintain the performance of these high-speed systems. At higher data rates, it is imperative to preserve the system performance by estimating the impairments of signal. These impairments are mainly due to the frequency dependent nature of transmitters, channels, and receivers in a communication system. Jitter plays a major role in contributing to these impairments thereby, degrading the performance of communication systems. As the speed of data transfer increases, the effects of jitter become more critical with tighter jitter budgets. In order to reduce the effects of jitter in a system, it is crucial to understand its causes and characteristics. In this thesis, the fundamentals of jitter along with its components and sources are reviewed. It illustrates several parameters relevant to the analysis of jitter and its types. This is followed by an overview of some traditional techniques used for jitter measurement and modeling such as the sampling oscilloscopes, bit error ratio tester (BERT), time interval analyzer (TIA), and some state-of-the-art algorithms such as the Tail fit, Peak distortion analysis (PDA), and direct computation of probabilities algorithms. These techniques are well-elucidated with examples as well as their pros and cons. This thesis presents an implementation of the most recent link statistical signaling technique for modeling jitter, in the presence of CMOS non-linearity observed in receivers. This algorithm is based on a superposition technique using HashMaps for determining the accurate logic level of digital data bits, in the presence of jitter. This approach deals with the overall effect of unwanted alterations observed on a data bit positioned at the cursor, contributed by neighboring bits in a digital data stream. In this technique, HashMaps are employed to sustain the computational intricacies involved in this algorithm. The time required for the execution is also reduced, making it an efficient technique for this implementation. The execution time of this technique is reduced by more than a third as compared to a prior implementation of the Link Analysis algorithm called ‘Bin Multiplication’. This technique is implemented for non-return to zero (NRZ), which is the most preferred signaling scheme in high-speed digital systems. Most of the jitter modeling techniques are based on the assumption of linear behavior of components in communication systems. However, in reality, receivers exhibit non-linear traits and this aspect substantially detriments the performance of a system. Thus, the statistical analysis for jitter measurement in terms of bit error rate (BER), is extended to account for the receiver’s non-linearity. In this research, the voltage characteristic of complementary metal-oxide semiconductor (CMOS) receivers is nominated for modeling the non-linearity in terms of hyperbolic tangent. The… Advisors/Committee Members: Aldo W Morales, Thesis Advisor/Co-Advisor, Sedig Salem Agili, Thesis Advisor/Co-Advisor, Jeremy Joseph Blum, Thesis Advisor/Co-Advisor.

Subjects/Keywords: Jitter; Probability density function; HashMap; Random Jitter; Deterministic Jitter; Inter-symbol interference; Non-Linearity

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Khilnani, T. L. (2015). An Efficient Implementation Of Link Analysis Algorithm In High-Speed Interfaces for NRZ In The Presence Of CMOS Non-Linearity In Receivers. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/27441

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Khilnani, Tapan Lalit. “An Efficient Implementation Of Link Analysis Algorithm In High-Speed Interfaces for NRZ In The Presence Of CMOS Non-Linearity In Receivers.” 2015. Thesis, Penn State University. Accessed January 21, 2021. https://submit-etda.libraries.psu.edu/catalog/27441.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Khilnani, Tapan Lalit. “An Efficient Implementation Of Link Analysis Algorithm In High-Speed Interfaces for NRZ In The Presence Of CMOS Non-Linearity In Receivers.” 2015. Web. 21 Jan 2021.

Vancouver:

Khilnani TL. An Efficient Implementation Of Link Analysis Algorithm In High-Speed Interfaces for NRZ In The Presence Of CMOS Non-Linearity In Receivers. [Internet] [Thesis]. Penn State University; 2015. [cited 2021 Jan 21]. Available from: https://submit-etda.libraries.psu.edu/catalog/27441.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khilnani TL. An Efficient Implementation Of Link Analysis Algorithm In High-Speed Interfaces for NRZ In The Presence Of CMOS Non-Linearity In Receivers. [Thesis]. Penn State University; 2015. Available from: https://submit-etda.libraries.psu.edu/catalog/27441

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Bordet, Nicolas. Modélisation 0D/1D de la combustion diesel : du mode conventionnel au mode homogène : 0D/1D modeling of Diesel combustion : from conventional to homogeneous combustion.

Degree: Docteur es, Energétique, 2011, Université d'Orléans

URL: http://www.theses.fr/2011ORLE2070

►

Cette thèse porte sur la modélisation 0D/1D de la combustion Diesel dans les moteurs récents. L’objectif est d’augmenter la précision des modèles tout en limitant… (more)

▼

Cette thèse porte sur la modélisation 0D/1D de la combustion Diesel dans les moteurs récents. L’objectif est d’augmenter la précision des modèles tout en limitant les temps de calcul associés afin d’utiliser la simulation comme un outil dédié à la mise au point. Dans une première partie, le développement d’un modèle 0D orienté simulation système est présenté. La prise en compte de l’ensemble des phénomènes physico-chimiques se déroulant dans la chambre de combustion confère au modèle un niveau de prédictivité conséquent. Un nouveau modèle de combustion de prémélange est proposé, permettant une modélisation détaillée des combustions fortement diluées et des combustions relatives aux injections précoces. Une approche innovante permettant de quantifier les interactions entre les jets pour la multi injection est également proposée. Après calibration sur un nombre restreint d’essais moteur, les résultats du modèle global sont comparés à des mesures expérimentales pour toute la plage de fonctionnement du moteur. La seconde partie de ce travail porte sur la modélisation 1D de la combustion Diesel. Un modèle de jet Diesel est d’abord développé et validé sur des mesures expérimentales. Ce modèle est ensuite étendu à des conditions réactionnelles à l’aide d’un couplage avec un modèle de combustion. Ce dernier s’appuie sur une tabulation des mécanismes de cinétique chimique, ainsi que sur une approche Eddy Break-Up permettant de modéliser le taux de réaction lié au micro mélange. Ce modèle est ensuite intégré à un modèle de chambre de combustion et une première validation du modèle sur des essais moteur réels est entreprise.

The present thesis focuses on the 0D/1D Diesel combustion modeling of recent engines. The goal is to improve models accuracy while minimizing computation times in order to use simulation as a tool for engine pre-mapping. In the first part, a 0D model designed as a system simulation-oriented tool is proposed. The main contribution of this study is the modeling of the premixed part of the Diesel combustion. This model allows a detailed modeling of highly diluted combustion and combustion related to early injections. A new approach to quantify interactions between each spray in the case of multi injection strategies is also proposed. After calibration using a very small number of engine tests, results for the global combustion chamber model are compared with experimental measurements for the overall engine operating conditions. The second part of this work deals with the 1D Diesel combustion modeling. A Diesel spray model is at first developed and validated on experimental measurements. This model is then extended to reaction conditions using the coupling with a combustion model. The combustion model makes use of tabulated local reaction rates of fuel and is based on the Eddy Break-Up approach to describe the reaction rate related to the turbulent mixing process. The next step is the integration of the burning spray model into a Diesel engine combustion chamber model. A first validation using experimental…

Advisors/Committee Members: Higelin, Pascal (thesis director).

Subjects/Keywords: Modélisation 0D/1D; Fonction à densité de probabilité; 0D/1D Modeling; Probability density function

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Bordet, N. (2011). Modélisation 0D/1D de la combustion diesel : du mode conventionnel au mode homogène : 0D/1D modeling of Diesel combustion : from conventional to homogeneous combustion. (Doctoral Dissertation). Université d'Orléans. Retrieved from http://www.theses.fr/2011ORLE2070

Chicago Manual of Style (16^th Edition):

Bordet, Nicolas. “Modélisation 0D/1D de la combustion diesel : du mode conventionnel au mode homogène : 0D/1D modeling of Diesel combustion : from conventional to homogeneous combustion.” 2011. Doctoral Dissertation, Université d'Orléans. Accessed January 21, 2021. http://www.theses.fr/2011ORLE2070.

MLA Handbook (7^th Edition):

Bordet, Nicolas. “Modélisation 0D/1D de la combustion diesel : du mode conventionnel au mode homogène : 0D/1D modeling of Diesel combustion : from conventional to homogeneous combustion.” 2011. Web. 21 Jan 2021.

Vancouver:

Bordet N. Modélisation 0D/1D de la combustion diesel : du mode conventionnel au mode homogène : 0D/1D modeling of Diesel combustion : from conventional to homogeneous combustion. [Internet] [Doctoral dissertation]. Université d'Orléans; 2011. [cited 2021 Jan 21]. Available from: http://www.theses.fr/2011ORLE2070.

Council of Science Editors:

Bordet N. Modélisation 0D/1D de la combustion diesel : du mode conventionnel au mode homogène : 0D/1D modeling of Diesel combustion : from conventional to homogeneous combustion. [Doctoral Dissertation]. Université d'Orléans; 2011. Available from: http://www.theses.fr/2011ORLE2070

16. Gaddam, Purna Chandra Srinivas Kumar. Advanced Image Processing Using Histogram Equalization and Android Application Implementation.

Degree: 2016, , Department of Applied Signal Processing

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13735

► Now a days the conditions at which the image taken may lead to near zero visibility for the human eye. They may usually due… (more)

Subjects/Keywords: Application program interface; Histogram equalization; Probability density function; Successive mean quantization transform.; Signal Processing; Signalbehandling

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Gaddam, P. C. S. K. (2016). Advanced Image Processing Using Histogram Equalization and Android Application Implementation. (Thesis). , Department of Applied Signal Processing. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13735

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gaddam, Purna Chandra Srinivas Kumar. “Advanced Image Processing Using Histogram Equalization and Android Application Implementation.” 2016. Thesis, , Department of Applied Signal Processing. Accessed January 21, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13735.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gaddam, Purna Chandra Srinivas Kumar. “Advanced Image Processing Using Histogram Equalization and Android Application Implementation.” 2016. Web. 21 Jan 2021.

Vancouver:

Gaddam PCSK. Advanced Image Processing Using Histogram Equalization and Android Application Implementation. [Internet] [Thesis]. , Department of Applied Signal Processing; 2016. [cited 2021 Jan 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13735.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Gaddam PCSK. Advanced Image Processing Using Histogram Equalization and Android Application Implementation. [Thesis]. , Department of Applied Signal Processing; 2016. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-13735

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

17. Silase, Geletu Biruk. Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks.

Degree: 2011, , School of Engineering

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3026

►

Reducing power consumption is among the top concerns in Wireless Sensor Networks, as the lifetime of a Wireless Sensor Network depends on its power… (more)

Subjects/Keywords: Wireless Sensor Networks; Directional Antennas; Non-parametric Probability Density Function Estimation; Spatial Interpolation

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APA (6^th Edition):

Silase, G. B. (2011). Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks. (Thesis). , School of Engineering. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Silase, Geletu Biruk. “Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks.” 2011. Thesis, , School of Engineering. Accessed January 21, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Silase, Geletu Biruk. “Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks.” 2011. Web. 21 Jan 2021.

Vancouver:

Silase GB. Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks. [Internet] [Thesis]. , School of Engineering; 2011. [cited 2021 Jan 21]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3026.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Silase GB. Modeling the Behavior of an Electronically Switchable Directional Antenna for Wireless Sensor Networks. [Thesis]. , School of Engineering; 2011. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3026

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Missouri – Columbia

18. Ma, Zhenhua. Asymptotically efficient estimators for geometric shape fitting and source localization.

Degree: 2013, University of Missouri – Columbia

URL: http://hdl.handle.net/10355/46134

► Solving the nonlinear estimation problem is known to be a challenging task because of the implicit relationship between the measurement data and the unknown parameters… (more)

▼ Solving the nonlinear estimation problem is known to be a challenging task because of the implicit relationship between the measurement data and the unknown parameters to be estimated. Iterative methods such as the Taylor-series expansion based ML estimator are presented in this thesis to solve the nonlinear estimation problem. However, they might suffer from the initialization and convergence problems. Other than the iterative methods, this thesis aims to provide a computational effective, asymptotically efficient and closed-form solution to the nonlinear estimation problem. Two kinds of classic nonlinear estimation problems are considered: the geometric shape fitting problem and the source localization problem. For the geometric shape fitting, the research in this thesis focuses on the circle and the ellipse fittings. Three iterative methods for the fitting of a single circle: the ML method, the FLS method and the SDP method, are provided and their performances are analyzed. To overcome the limitations of the iterative methods, asymptotically efficient and closed-form solutions for both the circle and ellipse fittings are derived. The good performances of the proposed solutions are supported by simulations using synthetic data as well as experiments on real images. The localization of a source via a group of sensors is another important nonlinear estimation problem studied in this thesis. Based on the TOA measurements, the CRLB and MSE results of a source location when sensor position errors are present are derived and compared to show the estimation performance loss due to the sensor position errors. A closed-formed estimator that takes into account the sensor position errors is then proposed. To further improve the sensor position and the source location estimates, an algebraic solution that jointly estimates the source and sensor positions is provided, which provides better performance in sensor position estimates at higher noise level comparing to the sequential estimation-refinement technique. The TOA based CRLB and MSE studies are further extended to the TDOA and AOA cases. Through the analysis one interesting result has been found: there are situations exist where taking into account the sensor position errors when estimating the source location will not improve the estimation accuracy. In such cases a calibration emitter with known position is needed to limit the estimation damage caused by the sensor position uncertainties. Investigation has been implemented to find out where would be the optimum position to place the calibration emitter. When the optimum calibration source position may be of theoretical interest only, a practical suboptimum criterion is developed which yields a better calibration emitter position than the closest to the unknown source criterion. Advisors/Committee Members: Ho, Dominic (advisor).

Subjects/Keywords: nonlinear estimation problem; sensor position; probability density function; Nonlinear theories; Estimation theory; Electrical engineering

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APA (6^th Edition):

Ma, Z. (2013). Asymptotically efficient estimators for geometric shape fitting and source localization. (Thesis). University of Missouri – Columbia. Retrieved from http://hdl.handle.net/10355/46134

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ma, Zhenhua. “Asymptotically efficient estimators for geometric shape fitting and source localization.” 2013. Thesis, University of Missouri – Columbia. Accessed January 21, 2021. http://hdl.handle.net/10355/46134.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ma, Zhenhua. “Asymptotically efficient estimators for geometric shape fitting and source localization.” 2013. Web. 21 Jan 2021.

Vancouver:

Ma Z. Asymptotically efficient estimators for geometric shape fitting and source localization. [Internet] [Thesis]. University of Missouri – Columbia; 2013. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10355/46134.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ma Z. Asymptotically efficient estimators for geometric shape fitting and source localization. [Thesis]. University of Missouri – Columbia; 2013. Available from: http://hdl.handle.net/10355/46134

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

De Montfort University

19. Mahmood, Khalid. Constrained linear and non-linear adaptive equalization techniques for MIMO-CDMA systems.

Degree: PhD, 2013, De Montfort University

URL: http://hdl.handle.net/2086/10203

► Researchers have shown that by combining multiple input multiple output (MIMO) techniques with CDMA then higher gains in capacity, reliability and data transmission speed can… (more)

▼ Researchers have shown that by combining multiple input multiple output (MIMO) techniques with CDMA then higher gains in capacity, reliability and data transmission speed can be attained. But a major drawback of MIMO-CDMA systems is multiple access interference (MAI) which can reduce the capacity and increase the bit error rate (BER), so statistical analysis of MAI becomes a very important factor in the performance analysis of these systems. In this thesis, a detailed analysis of MAI is performed for binary phase-shift keying (BPSK) signals with random signature sequence in Raleigh fading environment and closed from expressions for the probability density function of MAI and MAI with noise are derived. Further, probability of error is derived for the maximum Likelihood receiver. These derivations are verified through simulations and are found to reinforce the theoretical results. Since the performance of MIMO suffers significantly from MAI and inter-symbol interference (ISI), equalization is needed to mitigate these effects. It is well known from the theory of constrained optimization that the learning speed of any adaptive filtering algorithm can be increased by adding a constraint to it, as in the case of the normalized least mean squared (NLMS) algorithm. Thus, in this work both linear and non-linear decision feedback (DFE) equalizers for MIMO systems with least mean square (LMS) based constrained stochastic gradient algorithm have been designed. More specifically, an LMS algorithm has been developed , which was equipped with the knowledge of number of users, spreading sequence (SS) length, additive noise variance as well as MAI with noise (new constraint) and is named MIMO-CDMA MAI with noise constrained (MNCLMS) algorithm. Convergence and tracking analysis of the proposed algorithm are carried out in the scenario of interference and noise limited systems, and simulation results are presented to compare the performance of MIMO-CDMA MNCLMS algorithm with other adaptive algorithms.

Subjects/Keywords: 621.384; Multiple-input; multiple-output (MIMO); CDMA; multiple access interference (MAI); probability density function (pdf)

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APA (6^th Edition):

Mahmood, K. (2013). Constrained linear and non-linear adaptive equalization techniques for MIMO-CDMA systems. (Doctoral Dissertation). De Montfort University. Retrieved from http://hdl.handle.net/2086/10203

Chicago Manual of Style (16^th Edition):

Mahmood, Khalid. “Constrained linear and non-linear adaptive equalization techniques for MIMO-CDMA systems.” 2013. Doctoral Dissertation, De Montfort University. Accessed January 21, 2021. http://hdl.handle.net/2086/10203.

MLA Handbook (7^th Edition):

Mahmood, Khalid. “Constrained linear and non-linear adaptive equalization techniques for MIMO-CDMA systems.” 2013. Web. 21 Jan 2021.

Vancouver:

Mahmood K. Constrained linear and non-linear adaptive equalization techniques for MIMO-CDMA systems. [Internet] [Doctoral dissertation]. De Montfort University; 2013. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/2086/10203.

Council of Science Editors:

Mahmood K. Constrained linear and non-linear adaptive equalization techniques for MIMO-CDMA systems. [Doctoral Dissertation]. De Montfort University; 2013. Available from: http://hdl.handle.net/2086/10203

King Abdullah University of Science and Technology

20. Cai, Wenqi. Optimal Control Strategies for the Alignment Problem of Optical Communication Systems.

Degree: 2020, King Abdullah University of Science and Technology

URL: http://hdl.handle.net/10754/662465

► In this work, we propose three control strategies from different perspectives to solve the alignment problem for different optical wireless communication (OWC) systems. • Experimental… (more)

▼ In this work, we propose three control strategies from different perspectives to solve the alignment problem for different optical wireless communication (OWC) systems. • Experimental modeling based strategy: we model and analyze the vibration effects on the stationary OWC system (e.g. urban free-space optical (FSO) communication system in our case). The proposed Bifurcated-Gaussian (B-G) distribution model of the receiver optical power is derived under different vibra- tion levels and link distances using the nonlinear iteration method. Besides, the UFSO channel under the effects of both vibration and atmospheric turbulence is also explored under three atmospheric turbulence conditions. Our proposed B-G distribution model helps to easily evaluate the link performance of UFSO systems and paves the way for constructing completed auxiliary control subsys- tems for robust UFSO links. • Extremum seeking control based strategy: we propose an extremum seeking control (ESC) based strategy for the mobile OWC system. Our proposed ap- proach consists of coarse alignment and fine alignment. The coarse alignment using feedback proportional-derivative (PD) control is responsible for tracking and following the receiver. For fine alignment, the perturbation-based extremum seeking control (ESC) is adopted for a continuous search for the optimal posi- tion, where the received optical power is maximum in the presence of distur- bance. The proposed approach is simple, effective, and easy to implement. • Time scale theory based strategy: we design a time scale based Kalman filter for the intermittent OWC system. First, the algorithm of Kalman filter on time scales is presented, followed by several numerical examples for interpretation and analysis. The design of Kalman filter on time scales for our simulated vibrating OWC system is then discussed, whose results are analyzed thoroughly and further validated by a reference system. The proposed strategy has great potential for solving the problem of observer design in the case of intermittent received signals (non-uniform measurements) and paves the way for further controller design. The three proposed control strategies directly or indirectly solve the beam align- ment problem for optical communication systems, supporting the development of robust optical communication link.

Subjects/Keywords: Extremum seeking control; Optical wireless communication; Alignment; Time Scale Theory; kalman Filter; probability density function

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APA (6^th Edition):

Cai, W. (2020). Optimal Control Strategies for the Alignment Problem of Optical Communication Systems. (Thesis). King Abdullah University of Science and Technology. Retrieved from http://hdl.handle.net/10754/662465

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Cai, Wenqi. “Optimal Control Strategies for the Alignment Problem of Optical Communication Systems.” 2020. Thesis, King Abdullah University of Science and Technology. Accessed January 21, 2021. http://hdl.handle.net/10754/662465.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Cai, Wenqi. “Optimal Control Strategies for the Alignment Problem of Optical Communication Systems.” 2020. Web. 21 Jan 2021.

Vancouver:

Cai W. Optimal Control Strategies for the Alignment Problem of Optical Communication Systems. [Internet] [Thesis]. King Abdullah University of Science and Technology; 2020. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10754/662465.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Cai W. Optimal Control Strategies for the Alignment Problem of Optical Communication Systems. [Thesis]. King Abdullah University of Science and Technology; 2020. Available from: http://hdl.handle.net/10754/662465

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of New South Wales

21. Ranadive, Harshad. High-order compressible formulation for LES/PDF simulations of turbulent reacting flows.

Degree: Mechanical & Manufacturing Engineering, 2019, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/63381 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:60411/SOURCE02?view=true

► High-speed turbulent reacting flows are relevant to many modern engines. Large-eddy simulation (LES) is a practical and accurate approach to study such challenging flows in… (more)

▼ High-speed turbulent reacting flows are relevant to many modern engines. Large-eddy simulation (LES) is a practical and accurate approach to study such challenging flows in which the large scales of turbulence are resolved while those below a filter cut-off are modelled. In turbulent combustion, the transported probability density function (PDF) model is appealing because of its broad applicability and no modelling requirement for the reaction rate term. However, most of the progress with LES/PDF solvers has been limited to the low Mach regime. Moreover, the particle algorithms employed for solving the joint PDF equation have typically been first-order accurate in space and time. In this work, a high-order accurate compressible LES/PDF solver is developed starting with an existing direct numerical simulation (DNS) solver, S3D. Artificial fluid properties (AFP) are employed to model the sub-grid fluxes and the transport equation for the composition PDF is solved with the Lagrangian Monte Carlo approach. The governing equations are integrated in time with a new implementation of the Runge-Kutta algorithm that is fourth-order accurate for the deterministic equations and weak second-order accurate for the stochastic equations. High-order schemes are also employed for spatial discretisation, compact filter and particle interpolation and mean estimation. The newly developed solver is first studied with the Taylor-Green vortex problem to assess the capability of AFP as a sub-grid model, and then optimise its parameters with respect to the numerical dissipation from the compact filter. The optimal solver is then validated on a series of experimental non-reacting jets with and without temperature gradients. Next, a systematic validation of the PDF implementation is conducted with 1D problems and the temporal error convergence of the coupled solver is verified. Then, a temporally evolving non-premixed flame involving significant extinction and reignition is simulated at low and high convective Mach numbers and validated with DNS data. Finally, an experimental high Reynolds number supersonic lifted jet flame is simulated with the new LES/PDF capability. The predictions for the temporal and spatial jets are also compared with those from an LES employing a well-mixed model in order to highlight the importance of the PDF model. Advisors/Committee Members: Hawkes, Evatt, Mechanical & Manufacturing Engineering, Faculty of Engineering, UNSW, Savard, Bruno, Department of Mechanical Engineering, University of Ottawa, Ottawa K1N 6N5, Canada, Wang, Haiou, State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China..

Subjects/Keywords: High-order schemes; Large-eddy simulations; Transported probability density function; Compressible flows; Hybrid solvers

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APA (6^th Edition):

Ranadive, H. (2019). High-order compressible formulation for LES/PDF simulations of turbulent reacting flows. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/63381 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:60411/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Ranadive, Harshad. “High-order compressible formulation for LES/PDF simulations of turbulent reacting flows.” 2019. Doctoral Dissertation, University of New South Wales. Accessed January 21, 2021. http://handle.unsw.edu.au/1959.4/63381 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:60411/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Ranadive, Harshad. “High-order compressible formulation for LES/PDF simulations of turbulent reacting flows.” 2019. Web. 21 Jan 2021.

Vancouver:

Ranadive H. High-order compressible formulation for LES/PDF simulations of turbulent reacting flows. [Internet] [Doctoral dissertation]. University of New South Wales; 2019. [cited 2021 Jan 21]. Available from: http://handle.unsw.edu.au/1959.4/63381 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:60411/SOURCE02?view=true.

Council of Science Editors:

Ranadive H. High-order compressible formulation for LES/PDF simulations of turbulent reacting flows. [Doctoral Dissertation]. University of New South Wales; 2019. Available from: http://handle.unsw.edu.au/1959.4/63381 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:60411/SOURCE02?view=true

Texas State University – San Marcos

22. Schmidt, Martin. Kernel Estimation of Probability Density Functions for Interval-censored Sexually Transmitted Disease Data with Diary Information.

Degree: MS, Applied Mathematics, 2018, Texas State University – San Marcos

URL: https://digital.library.txstate.edu/handle/10877/7419

► The purpose of this study is to propose a method to reliably estimate the survival function of the true infection time of a sexually transmitted… (more)

Subjects/Keywords: Kernel; Estimation; Probability; Density; Function; STD; Clinical trials – Statistical methods; Sexually transmitted diseases

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APA (6^th Edition):

Schmidt, M. (2018). Kernel Estimation of Probability Density Functions for Interval-censored Sexually Transmitted Disease Data with Diary Information. (Masters Thesis). Texas State University – San Marcos. Retrieved from https://digital.library.txstate.edu/handle/10877/7419

Chicago Manual of Style (16^th Edition):

Schmidt, Martin. “Kernel Estimation of Probability Density Functions for Interval-censored Sexually Transmitted Disease Data with Diary Information.” 2018. Masters Thesis, Texas State University – San Marcos. Accessed January 21, 2021. https://digital.library.txstate.edu/handle/10877/7419.

MLA Handbook (7^th Edition):

Schmidt, Martin. “Kernel Estimation of Probability Density Functions for Interval-censored Sexually Transmitted Disease Data with Diary Information.” 2018. Web. 21 Jan 2021.

Vancouver:

Schmidt M. Kernel Estimation of Probability Density Functions for Interval-censored Sexually Transmitted Disease Data with Diary Information. [Internet] [Masters thesis]. Texas State University – San Marcos; 2018. [cited 2021 Jan 21]. Available from: https://digital.library.txstate.edu/handle/10877/7419.

Council of Science Editors:

Schmidt M. Kernel Estimation of Probability Density Functions for Interval-censored Sexually Transmitted Disease Data with Diary Information. [Masters Thesis]. Texas State University – San Marcos; 2018. Available from: https://digital.library.txstate.edu/handle/10877/7419

23. Tamatoro, Johng-Ay. Approche stochastique de l'analyse du « residual moveout » pour la quantification de l'incertitude dans l'imagerie sismique : A stochastic approach to uncertainty quantification in residual moveout analysis.

Degree: Docteur es, Mathématiques Appliquées, 2014, Pau

URL: http://www.theses.fr/2014PAUU3044

► Le principale objectif de l'imagerie sismique pétrolière telle qu'elle est réalisée de nos jours est de fournir une image représentative des quelques premiers kilomètres du… (more)

▼ Le principale objectif de l'imagerie sismique pétrolière telle qu'elle est réalisée de nos jours est de fournir une image représentative des quelques premiers kilomètres du sous-sol. Cette image permettra la localisation des structures géologiques formant les réservoirs où sont piégées les ressources en hydrocarbures. Pour pouvoir caractériser ces réservoirs et permettre la production des hydrocarbures, le géophysicien utilise la migration-profondeur qui est un outil d'imagerie sismique qui sert à convertir des données-temps enregistrées lors des campagnes d'acquisition sismique en des images-profondeur qui seront exploitées par l'ingénieur-réservoir avec l'aide de l'interprète sismique et du géologue. Lors de la migration profondeur, les évènements sismiques (réflecteurs,…) sont replacés à leurs positions spatiales correctes. Une migration-profondeur pertinente requiert une évaluation précise modèle de vitesse. La précision du modèle de vitesse utilisé pour une migration est jugée au travers l'alignement horizontal des évènements présents sur les Common Image Gather (CIG). Les évènements non horizontaux (Residual Move Out) présents sur les CIG sont dus au ratio du modèle de vitesse de migration par la vitesse effective du milieu. L'analyse du Residual Move Out (RMO) a pour but d'évaluer ce ratio pour juger de la pertinence du modèle de vitesse et permettre sa mise à jour. Les CIG qui servent de données pour l'analyse du RMO sont solutions de problèmes inverses mal posés, et sont corrompues par du bruit. Une analyse de l'incertitude s'avère nécessaire pour améliorer l'évaluation des résultats obtenus. Le manque d'outils d'analyse de l'incertitude dans l'analyse du RMO en fait sa faiblesse. L'analyse et la quantification de l'incertitude pourrait aider à la prise de décisions qui auront des impacts socio-économiques importantes. Ce travail de thèse a pour but de contribuer à l'analyse et à la quantification de l'incertitude dans l'analyse des paramètres calculés pendant le traitement des données sismiques et particulièrement dans l'analyse du RMO. Pour atteindre ces objectifs plusieurs étapes ont été nécessaires. Elles sont entre autres :- L’appropriation des différents concepts géophysiques nécessaires à la compréhension du problème (organisation des données de sismique réflexion, outils mathématiques et méthodologiques utilisés);- Présentations des méthodes et outils pour l'analyse classique du RMO;- Interprétation statistique de l’analyse classique;- Proposition d’une approche stochastique;Cette approche stochastique consiste en un modèle statistique hiérarchique dont les paramètres sont :- la variance traduisant le niveau de bruit dans les données estimée par une méthode basée sur les ondelettes, - une fonction qui traduit la cohérence des amplitudes le long des évènements estimée par des méthodes de lissages de données,- le ratio qui est considéré comme une variable aléatoire et non comme un paramètre fixe inconnue comme c'est le cas dans l'approche classique de l'analyse du RMO. Il est estimé par des méthodes de… Advisors/Committee Members: Bordes, Laurent (thesis director).

Subjects/Keywords: Approche Bayésienne; Approche stochastique; Loi de probabilité; Loi a posteriori; Monte-Carlo par chaînes de Markov; Metropolis - Hastings; Analyse du « Residual moveout »; Analyse de l’incertitude; Semblance; Données sismiques; AVO; Bayesian approach; Stochastic approach; Markov chain Monte Carlo; Metropolis - Hastings; Probability density function; A posteriori distribution; Residual Moveout Analysis; Uncertainty analysis; Semblance; Seismic data; AVO; Common Image Gathers

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Tamatoro, J. (2014). Approche stochastique de l'analyse du « residual moveout » pour la quantification de l'incertitude dans l'imagerie sismique : A stochastic approach to uncertainty quantification in residual moveout analysis. (Doctoral Dissertation). Pau. Retrieved from http://www.theses.fr/2014PAUU3044

Chicago Manual of Style (16^th Edition):

Tamatoro, Johng-Ay. “Approche stochastique de l'analyse du « residual moveout » pour la quantification de l'incertitude dans l'imagerie sismique : A stochastic approach to uncertainty quantification in residual moveout analysis.” 2014. Doctoral Dissertation, Pau. Accessed January 21, 2021. http://www.theses.fr/2014PAUU3044.

MLA Handbook (7^th Edition):

Tamatoro, Johng-Ay. “Approche stochastique de l'analyse du « residual moveout » pour la quantification de l'incertitude dans l'imagerie sismique : A stochastic approach to uncertainty quantification in residual moveout analysis.” 2014. Web. 21 Jan 2021.

Vancouver:

Tamatoro J. Approche stochastique de l'analyse du « residual moveout » pour la quantification de l'incertitude dans l'imagerie sismique : A stochastic approach to uncertainty quantification in residual moveout analysis. [Internet] [Doctoral dissertation]. Pau; 2014. [cited 2021 Jan 21]. Available from: http://www.theses.fr/2014PAUU3044.

Council of Science Editors:

Tamatoro J. Approche stochastique de l'analyse du « residual moveout » pour la quantification de l'incertitude dans l'imagerie sismique : A stochastic approach to uncertainty quantification in residual moveout analysis. [Doctoral Dissertation]. Pau; 2014. Available from: http://www.theses.fr/2014PAUU3044

24. Athar, Haseeb. Characterization of probability distributions through conditional moments of order statistics;.

Degree: Statistics and Operations Research, 2000, Aligarh Muslim University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/50014

Abstract available newline newline

Bibliography p. 69-76

Advisors/Committee Members: Yaqub, Mohd..

Subjects/Keywords: Probability Distributions; Conditional Moments; Order Statistics; Probability Density Function

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APA (6^th Edition):

Athar, H. (2000). Characterization of probability distributions through conditional moments of order statistics;. (Thesis). Aligarh Muslim University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/50014

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Athar, Haseeb. “Characterization of probability distributions through conditional moments of order statistics;.” 2000. Thesis, Aligarh Muslim University. Accessed January 21, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/50014.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Athar, Haseeb. “Characterization of probability distributions through conditional moments of order statistics;.” 2000. Web. 21 Jan 2021.

Vancouver:

Athar H. Characterization of probability distributions through conditional moments of order statistics;. [Internet] [Thesis]. Aligarh Muslim University; 2000. [cited 2021 Jan 21]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/50014.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Athar H. Characterization of probability distributions through conditional moments of order statistics;. [Thesis]. Aligarh Muslim University; 2000. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/50014

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Tennessee – Knoxville

25. Bull, Nora Dianne. An Innovative Approach to Johnson Noise Thermometry by Means of Spectral Estimation.

Degree: 2016, University of Tennessee – Knoxville

URL: https://trace.tennessee.edu/utk_graddiss/3897

► Instrumentation in a nuclear power plant is critical in monitoring the stability and safety levels of a reactor. Temperature is a key measurement performed on… (more)

▼ Instrumentation in a nuclear power plant is critical in monitoring the stability and safety levels of a reactor. Temperature is a key measurement performed on the core of a reactor to control the power output and sustain a safe thermal margin. If there is a dramatic change in temperature, failure is likely to follow if action is not taken to cool the system. Traditionally, to measure the temperature of a reactor, several resistance temperature detectors are placed in predefined locations on the system. Resistance temperature detectors (RTD) are typically platinum coiled wire wrapped around a ceramic cylinder and encased in a metal sheath. Due to the harsh environment of nuclear reactors, the RTDs degrade and their resistance measurements drift over time. This drift in resistance can be misunderstood as a drift in reactor temperature. In the past, the RTDs would be serviced every few years either through calibration or replacement. To service the RTDs the reactor is shut down and a person is sent into a dangerous environment. Utilizing Johnson Noise Thermometry (JNT) will reduce the occurrences of service needed for RTDs and provide a high- accuracy temperature measurement. JNT is a first order fundamental expression of temperature invulnerable to drift in the RTD’s physical condition. The signal processing behind JNT is presented in the following document. Spectral Estimation methods are utilized in order to remove electromagnetic interference (EMI) from the JNT measurement. These methods are unique to this dissertation. The EMI estimation method is modeled and simulation results are presented. The modeling of the EMI estimation involves locating EMI, analysis of EMI effects, and removal without bias. Finally, results from numerical and experimental verification are presented. The research presented here is important to furthering the future of the nuclear industry for several reasons. With this technology applied to existing systems reactor shut-down time can be decreased, technicians limit their exposure to dangerous radiation zones, and financial support for lengthy shut-downs is saved. The instrumentation community will benefit through the innovation of signal processing for very small signal versus noise interference.

Subjects/Keywords: spectral estimation; probability density function; power spectral density; electromagnetic interference; EMI removal; Johnson Noise thermometry; Signal Processing

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APA (6^th Edition):

Bull, N. D. (2016). An Innovative Approach to Johnson Noise Thermometry by Means of Spectral Estimation. (Doctoral Dissertation). University of Tennessee – Knoxville. Retrieved from https://trace.tennessee.edu/utk_graddiss/3897

Chicago Manual of Style (16^th Edition):

Bull, Nora Dianne. “An Innovative Approach to Johnson Noise Thermometry by Means of Spectral Estimation.” 2016. Doctoral Dissertation, University of Tennessee – Knoxville. Accessed January 21, 2021. https://trace.tennessee.edu/utk_graddiss/3897.

MLA Handbook (7^th Edition):

Bull, Nora Dianne. “An Innovative Approach to Johnson Noise Thermometry by Means of Spectral Estimation.” 2016. Web. 21 Jan 2021.

Vancouver:

Bull ND. An Innovative Approach to Johnson Noise Thermometry by Means of Spectral Estimation. [Internet] [Doctoral dissertation]. University of Tennessee – Knoxville; 2016. [cited 2021 Jan 21]. Available from: https://trace.tennessee.edu/utk_graddiss/3897.

Council of Science Editors:

Bull ND. An Innovative Approach to Johnson Noise Thermometry by Means of Spectral Estimation. [Doctoral Dissertation]. University of Tennessee – Knoxville; 2016. Available from: https://trace.tennessee.edu/utk_graddiss/3897

University of Edinburgh

26. Shahraeeni, Mohammad Sadegh. Inversion of seismic attributes for petrophysical parameters and rock facies.

Degree: PhD, 2011, University of Edinburgh

URL: http://hdl.handle.net/1842/4754

► Prediction of rock and fluid properties such as porosity, clay content, and water saturation is essential for exploration and development of hydrocarbon reservoirs. Rock and… (more)

▼ Prediction of rock and fluid properties such as porosity, clay content, and water saturation is essential for exploration and development of hydrocarbon reservoirs. Rock and fluid property maps obtained from such predictions can be used for optimal selection of well locations for reservoir development and production enhancement. Seismic data are usually the only source of information available throughout a field that can be used to predict the 3D distribution of properties with appropriate spatial resolution. The main challenge in inferring properties from seismic data is the ambiguous nature of geophysical information. Therefore, any estimate of rock and fluid property maps derived from seismic data must also represent its associated uncertainty. In this study we develop a computationally efficient mathematical technique based on neural networks to integrate measured data and a priori information in order to reduce the uncertainty in rock and fluid properties in a reservoir. The post inversion (a posteriori) information about rock and fluid properties are represented by the joint probability density function (PDF) of porosity, clay content, and water saturation. In this technique the a posteriori PDF is modeled by a weighted sum of Gaussian PDF’s. A so-called mixture density network (MDN) estimates the weights, mean vector, and covariance matrix of the Gaussians given any measured data set. We solve several inverse problems with the MDN and compare results with Monte Carlo (MC) sampling solution and show that the MDN inversion technique provides good estimate of the MC sampling solution. However, the computational cost of training and using the neural network is much lower than solution found by MC sampling (more than a factor of 104 in some cases). We also discuss the design, implementation, and training procedure of the MDN, and its limitations in estimating the solution of an inverse problem. In this thesis we focus on data from a deep offshore field in Africa. Our goal is to apply the MDN inversion technique to obtain maps of petrophysical properties (i.e., porosity, clay content, water saturation), and petrophysical facies from 3D seismic data. Petrophysical facies (i.e., non-reservoir, oil- and brine-saturated reservoir facies) are defined probabilistically based on geological information and values of the petrophysical parameters. First, we investigate the relationship (i.e., petrophysical forward function) between compressional- and shear-wave velocity and petrophysical parameters. The petrophysical forward function depends on different properties of rocks and varies from one rock type to another. Therefore, after acquisition of well logs or seismic data from a geological setting the petrophysical forward function must be calibrated with data and observations. The uncertainty of the petrophysical forward function comes from uncertainty in measurements and uncertainty about the type of facies. We present a method to construct the petrophysical forward function with its associated uncertainty from the both…

Subjects/Keywords: 622; probability density function; clay content; water saturation; porosity; Gaussians; neural network; mixture density network; petrophysical inverse problems

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Shahraeeni, M. S. (2011). Inversion of seismic attributes for petrophysical parameters and rock facies. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/4754

Chicago Manual of Style (16^th Edition):

Shahraeeni, Mohammad Sadegh. “Inversion of seismic attributes for petrophysical parameters and rock facies.” 2011. Doctoral Dissertation, University of Edinburgh. Accessed January 21, 2021. http://hdl.handle.net/1842/4754.

MLA Handbook (7^th Edition):

Shahraeeni, Mohammad Sadegh. “Inversion of seismic attributes for petrophysical parameters and rock facies.” 2011. Web. 21 Jan 2021.

Vancouver:

Shahraeeni MS. Inversion of seismic attributes for petrophysical parameters and rock facies. [Internet] [Doctoral dissertation]. University of Edinburgh; 2011. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/1842/4754.

Council of Science Editors:

Shahraeeni MS. Inversion of seismic attributes for petrophysical parameters and rock facies. [Doctoral Dissertation]. University of Edinburgh; 2011. Available from: http://hdl.handle.net/1842/4754

Miami University

27. Elesev, Aleksandr. Robot Localization Using Inertial and RF Sensors.

Degree: Master of Computer Science, Computer Science and Systems Analysis, 2008, Miami University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=miami1218571607

► A mobile robot must know its position in order to operate autonomously. The process of determining the robot's position from sensor data is termed robot… (more)

Subjects/Keywords: Artificial Intelligence; Computer Science; Robots; robot localization; navigation; IMU; inertial sensors; RF; radio frequency sensors; particle filters; grid-based approach; PDF; probability density function; calibration

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Elesev, A. (2008). Robot Localization Using Inertial and RF Sensors. (Masters Thesis). Miami University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=miami1218571607

Chicago Manual of Style (16^th Edition):

Elesev, Aleksandr. “Robot Localization Using Inertial and RF Sensors.” 2008. Masters Thesis, Miami University. Accessed January 21, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=miami1218571607.

MLA Handbook (7^th Edition):

Elesev, Aleksandr. “Robot Localization Using Inertial and RF Sensors.” 2008. Web. 21 Jan 2021.

Vancouver:

Elesev A. Robot Localization Using Inertial and RF Sensors. [Internet] [Masters thesis]. Miami University; 2008. [cited 2021 Jan 21]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1218571607.

Council of Science Editors:

Elesev A. Robot Localization Using Inertial and RF Sensors. [Masters Thesis]. Miami University; 2008. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=miami1218571607

NSYSU

28. Hsu, Lee-Yang. Dynamic Economic Dispatch Incorporating Renewable Energy with Carbon Trading.

Degree: Master, Electrical Engineering, 2012, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619112-174014

► Carbon dioxide (CO2) is the most important component of Greenhouse Gas (GHG) that causes global warming and sea-level rising. Thermal power plants dominate electric power… (more)

Subjects/Keywords: Particle Swarm Optimization with Time-Varying Acceleration Coefficients; Weibull Probability Density Function; Dynamic Economic Dispatch; Carbon Trading.; CO2 Emission

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hsu, L. (2012). Dynamic Economic Dispatch Incorporating Renewable Energy with Carbon Trading. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619112-174014

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hsu, Lee-Yang. “Dynamic Economic Dispatch Incorporating Renewable Energy with Carbon Trading.” 2012. Thesis, NSYSU. Accessed January 21, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619112-174014.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hsu, Lee-Yang. “Dynamic Economic Dispatch Incorporating Renewable Energy with Carbon Trading.” 2012. Web. 21 Jan 2021.

Vancouver:

Hsu L. Dynamic Economic Dispatch Incorporating Renewable Energy with Carbon Trading. [Internet] [Thesis]. NSYSU; 2012. [cited 2021 Jan 21]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619112-174014.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hsu L. Dynamic Economic Dispatch Incorporating Renewable Energy with Carbon Trading. [Thesis]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0619112-174014

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

29. Papatsouma, Ioanna. Συμβολή στη δειγματοληπτική ανάδειξη μοντέλων κατανομών με χρήση του συντελεστή μεταβλητότητας.

Degree: 2018, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)

URL: http://hdl.handle.net/10442/hedi/46247

►

The aim of the present thesis is the examination of the behaviour of the Coefficient of Variation and its contribution to emerging distribution models via… (more)

▼

The aim of the present thesis is the examination of the behaviour of the Coefficient of Variation and its contribution to emerging distribution models via Sampling. The first two chapters describe what is known so far and review previous work done in the domain of the thesis. More precisely, the introductory chapter gives some definitions of basic concepts, which are needed as a basis for the subsequent chapters. The second chapter describes the concept of the Coefficient of Variation and its properties. Confidence intervals are presented based on the type of distribution and appropriate statistical hypothesis tests are given. The concepts of the Weighted Coefficient of Variation and the Multivariate Coefficient of Variation are also described, as well as unbiased estimators of the Coefficient of Variation. At the end of the chapter, we present some uses of the Coefficient of Variation and the Weighted Coefficient of Variation in various scientific fields. The following chapters are the originality of the thesis. A new function of polynomial form is introduced in the distribution theory, with a real number ν as a degree, which is calculated solely from the sample Coefficient of Variation. That new function, based on data distribution, has a specific formula and type, which can be either symmetric, ascending or descending type and approximates known or unknown distributions or emerges new ones. Moreover, the parallel theoretical and sampling study leads to the emergence of the correct or more nearly correct model of a distribution. Given that the degree obeys specific restrictions, which lead to a restricted Coefficient of Variation, information for the coefficient of variation is obtained of the distributions approximated by the new function. The values of the Coefficient of Variation are of great interest to researchers, who will identify the type of distribution via sampling and therefore will know the expected value of the Coefficient of Variation. If the value of the sample Coefficient of Variation moves away from the expected value, then the researcher should give an answer to this and draw conclusions depending on his scientific field. In the chapters 3, 4 and 5, the polynomial approach of the probability density functions (pdf) of symmetric type, ascending form and descending type, respectively, of a continuous random variable X, is attempted. The sixth chapter is devoted entirely to the contribution of the Coefficient of Variation to emerging distribution models via Sampling. Special forms of functions are described and representative examples are displayed. In the seventh chapter, a brief reference is made to the case of the discrete random variable X and we provide the answer to the question whether or not the sample Coefficient of Variation is a good estimator of the population Coefficient of Variation

Στην παρούσα διδακτορική διατριβή γίνεται μελέτη της συμπεριφοράς του συντελεστή μεταβλητότητας και της συμβολής του στην ανάδειξη μοντέλων κατανομών μέσα από δειγματοληψία. Στα δύο πρώτα κεφάλαια γίνεται…

Subjects/Keywords: Συνάρτηση πυκνότητας πιθανότητας; Προσαρμογή κατανομών; Κανονική κατανομή; Πολυωνυμική προσέγγιση; Probability density function; Normal distribution; Κατανομή Laplace; Distribution fitting

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Papatsouma, I. (2018). Συμβολή στη δειγματοληπτική ανάδειξη μοντέλων κατανομών με χρήση του συντελεστή μεταβλητότητας. (Thesis). Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Retrieved from http://hdl.handle.net/10442/hedi/46247

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Papatsouma, Ioanna. “Συμβολή στη δειγματοληπτική ανάδειξη μοντέλων κατανομών με χρήση του συντελεστή μεταβλητότητας.” 2018. Thesis, Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ). Accessed January 21, 2021. http://hdl.handle.net/10442/hedi/46247.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Papatsouma, Ioanna. “Συμβολή στη δειγματοληπτική ανάδειξη μοντέλων κατανομών με χρήση του συντελεστή μεταβλητότητας.” 2018. Web. 21 Jan 2021.

Vancouver:

Papatsouma I. Συμβολή στη δειγματοληπτική ανάδειξη μοντέλων κατανομών με χρήση του συντελεστή μεταβλητότητας. [Internet] [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2018. [cited 2021 Jan 21]. Available from: http://hdl.handle.net/10442/hedi/46247.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Papatsouma I. Συμβολή στη δειγματοληπτική ανάδειξη μοντέλων κατανομών με χρήση του συντελεστή μεταβλητότητας. [Thesis]. Aristotle University Of Thessaloniki (AUTH); Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ); 2018. Available from: http://hdl.handle.net/10442/hedi/46247

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

30. João Luiz Felde. Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii.

Degree: 2010, UNICENTRO – Universidade Estadual do Centro Oeste

URL: http://tede.unicentro.br/tde_busca/arquivo.php?codArquivo=80

►

O objetivo principal desta pesquisa foi desenvolver um sistema simulador do crescimento e produção de plantios não desbastados de Eucalyptus dunnii utilizando-se diferentes métodos de… (more)

▼

O objetivo principal desta pesquisa foi desenvolver um sistema simulador do crescimento e produção de plantios não desbastados de Eucalyptus dunnii utilizando-se diferentes métodos de ajuste para a função densidade de probabilidade Weibull para descrever a estrutura da floresta nas várias idades. Os dados utilizados neste trabalho são provenientes da medição de 239 parcelas de povoamentos de E. dunnii na região de Telêmaco Borba, PR, de propriedade da empresa Klabin S.A., com idades variando de 3 a 20 anos. Testou-se a estimativa dos parâmetros da função probabilística Weibull 3P em cada parcela, ajustando-a pelo método do estimador da máxima verossimilhança e pelo método dos momentos modificado para reconhecer a assimetria da distribuição dos dados, e também o ajuste da função Weibull 2P e 3P pelo método dos momentos em sua forma tradicional. Os ajustes por parcela foram avaliados pelo teste de aderência de Kolmogorov-Smirnov, pelo cálculo do Índice de Reynolds e do erro padrão da estimativa. Foram testadas equações para predição da altura dominante em função da idade e construção de curvas de sítio para o povoamento, expressões para representar a relação hipsométrica nas várias idades, e também foram modelados atributos da floresta sem desbaste para expressar a sobrevivência, área basal, diâmetro mínimo, diâmetro máximo e variância dos diâmetros. Os ajustes por parcelas indicaram que o método do estimador da máxima verossimilhança é o menos acurado na estimativa da frequência de árvores em cada classe diamétrica. O ajuste pelo método dos momentos em sua forma modificada para reconhecer a assimetria dos dados apresentou valores bem próximos aos obtido pelo ajuste da função de 3P pelo método dos momentos em sua forma tradicional. Na comparação do ajuste da função de dois e três parâmetros, a função Weibull 2P mostrou-se mais acurada, com estatísticas um pouco superiores. Após a modelagem dos atributos do povoamento foi construído um simulador do crescimento e produção de E. dunnii utilizando a função Weibull para estimativa da frequência das árvores em cada classe diamétrica, e consequentemente a produção volumétrica em cada uma destas. A função Weibull com dois e com três parâmetros foi utilizada nas simulações, e as frequências obtidas em cada simulação foram comparadas com as frequências médias observadas no conjunto de dados nas várias combinações idade-sítio, aplicando-se o teste de identidade L&O. As estatísticas do teste de identidade demonstraram que em 21% das simulações que utilizaram a função Weibull 3P houve identidade entre as frequências estimadas e as frequências observadas em cada combinação idade-sítio. Para as simulações que utilizaram a função Weibull 2P o percentual de identidade entre os valores observados e os valores estimados foi de 30%, indicando superioridade da função de dois parâmetros no uso em simulações da frequência por classe diamétrica.

The main objective of this research was to develop a simulator system of growth and yield for unthinned plantations of Eucalyptus dunnii using…

Advisors/Committee Members: Andrea Nogueira Dias, Afonso Figueiredo Filho.

Subjects/Keywords: Função densidade de probabilidade; modelagem; simulação; Diameter structure projection; probability density function; modeling; simulation; FLORESTAMENTO E REFLORESTAMENTO; Projeção da estrutura diamétrica

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Felde, J. L. (2010). Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii. (Thesis). UNICENTRO – Universidade Estadual do Centro Oeste. Retrieved from http://tede.unicentro.br/tde_busca/arquivo.php?codArquivo=80

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Felde, João Luiz. “Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii.” 2010. Thesis, UNICENTRO – Universidade Estadual do Centro Oeste. Accessed January 21, 2021. http://tede.unicentro.br/tde_busca/arquivo.php?codArquivo=80.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Felde, João Luiz. “Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii.” 2010. Web. 21 Jan 2021.

Vancouver:

Felde JL. Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii. [Internet] [Thesis]. UNICENTRO – Universidade Estadual do Centro Oeste; 2010. [cited 2021 Jan 21]. Available from: http://tede.unicentro.br/tde_busca/arquivo.php?codArquivo=80.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Felde JL. Métodos de ajuste da função Weibull e seu desempenho na prognose do crescimento e produção de Eucalyptus dunnii. [Thesis]. UNICENTRO – Universidade Estadual do Centro Oeste; 2010. Available from: http://tede.unicentro.br/tde_busca/arquivo.php?codArquivo=80

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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Open Access Theses and Dissertations