Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 64 for “"probability density function (pdf)"”.
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A Full Distribution Approach to Simulating the Industry Aggregate in the Input-Output Modeling Framework
… of microlevel components by a theoretical probability density function (pdf) is introduced as an alternative to the traditional point estimate, given the varied and strongly skewed observed production coefficient distributions.
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Automated Visual Database Creation For A Ground Vehicle Simulator
… uses an initial truth frame to develop a color probability density function (PDF) of the road versus the terrain. Subsequent frames are segmented using a Maximum Apostiori Probability (MAP) criteria and the resulting templates are used to update the PDFs. Color segmentation worked well where …
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Weighted Inverse Weibull and Beta-Inverse Weibull Distribution
… Weibull distribution including the hazard function, reverse hazard function, moments, moment generating function, coefficient of variation, coefficient of skewness, coefficient of kurtosis, Fisher information and Shanon entropy are studied. The estimation for the parameters of the …
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CFD Simulation of Combustion Using Automatically Reduced Reaction Mechanisms : A Case for Diesel Engine
… is created. It is combined with a presumed probability density function (PDF) method in order to enable turbulence-chemistry interactions. Scalar dissipation rate is calculated to compare the mechanical and chemistry time scales and to choose the appropriate numerical cells for chemistry …
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Non-Rayleigh scattering by a randomly oriented elongated scatterer
… statistics and, in particular, the tails of the probability density function (PDF) and probability of false alarm (PFA) are shown to be strongly non-Rayleigh and a strong function of shape of scatterer. The tails are shown to increase above that associated with a Rayleigh distribution with …
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Non-Rayleigh scattering by a randomly oriented elongated scatterer
… statistics and, in particular, the tails of the probability density function (PDF) and probability of false alarm (PFA) are shown to be strongly non-Rayleigh and a strong function of shape of scatterer. The tails are shown to increase above that associated with a Rayleigh distribution with …
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Probability Density Function Estimation Applied to Minimum Bit Error Rate Adaptive Filtering
… of this research involves estimation of the probability density function (PDF) of the received signal; this PDF estimate is used to adaptively determine a solution that minimizes BER. To this end, a new adaptive procedure called the Minimum BER Estimation (MBE) algorithm has been developed. …
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Numerical modeling and simulation of compressible reacting turbulent shear layers
… layer modeling results are presented. An assumed probability density function (PDF) turbulent H$\sb2$-air combustion model is implemented and demonstrated using three forms of PDFs. For comparison, 9-species, 18-reaction finite-rate and equilibrium calculations are also presented. The importance …
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Network anomaly detection using management information base (MIB) network traffic variables
… collected during each observation window, into a Probability Density Function (PDF), processed them statistically, combined intelligently the result for each individual variable and derived the final decision. The MAD system has a distributed, hierarchical, multi-tier architecture, based on which …
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Calculations of Step -Edge Currents on Crystal Surfaces
… compact, closed form representation of the probability density function (PDF) for an adatom undergoing a random walk along such a ledge. The representation allows for an arbitrary energy barrier structure between adjacent binding sites and accounts for the possibility of desorption from the …
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A Study of Reject Inference Techniques
… inference.In this approach, the underlying probability density function (PDF) for the totalpopulation of all applicants is modeled as a weighted average of the PDFs of the acceptedpopulation and the rejected population. The unknown parameters in this model will thenbe the mixing parameters …
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Sea ice thickness and iceberg distribution in the Southern Ocean
… ice thickness distribution, represented by the probability density function (PDF), is critical to Earth's climate system and knowledge of the distribution in the Antarctic is limited. A novel methodology, using an acoustic Doppler current profiler, was developed to measure sea ice draft based on …
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Probabalistic quantification of intermittently unstable dynamical systems
… time series of the system or heavy-tails in the probability density function (pdf) of the response. We formulate a method that can analytically approximate the response pdf (both the main probability mass and heavy-tail structure) for systems where intermittency is important to quantify. The …
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Hierarchical Game Theory based Control for Large Scale Multi-Agent Systems: A Hybrid Reinforcement Learning Approach
… the overall population is represented through a probability density function (PDF). However, conventional MFG formulations often lack the ability to capture diverse coordination behaviors due to their reliance on a single global PDF, leading to suboptimal performance in heterogeneous or …
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Probabilistic skylines on uncertain data
… model where an uncertain object may take a probability to be in the skyline, and a p-skyline contains all the objects whose skyline probabilities are at least p. Computing probabilistic skylines on large uncertain data sets is challenging. An uncertain object is conceptually described by a …
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Combustion simulations in Diesel engines using reduced reaction mechanisms
… detailed mechanism and combined with a presumed probability density function (pdf). The intrinsic low-dimensional manifold (ILDM) method was used as a chemistry model. It is an automatic reduction of a detailed chemical mechanism based on a local timescale analysis. It was also combined with a …
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LARGE EDDY SIMULATION OF TURBULENT HYDROGEN FLAMES
… flamelet-based models and transported probability density function (PDF) methods based on the Eulerian stochastic fields (ESF) framework are employed to capture the interaction between turbulence and chemistry. The study focuses on both premixed and non-premixed hydrogen flames, using …
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Probabilistic photometric redshifts in the era of petascale astronomy
… photometric redshifts, preferably as a probability density function (PDF), and fully understanding the implicit systematic uncertainties in this process has become increasingly important. These surveys are expected to obtain images of billions of distinct galaxies. As a result, storing …
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Model Abstraction in Dynamical Systems: Application to Mobile Robot Control
… conditions. A conservation law is applied to the probability density function (pdf) requiring that the area under it be unity. Application of the conservation law results in a partial differential equation known as the Liouville equation, for which a closed form solution is known. The solution …
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Conditional source-term estimation methods for turbulent reacting flows
… variable is chosen for conditioning. Presumed Probability Density Function (PDF) models for the progress variable are studied. A modified version of a laminar flame-based PDF model is proposed, which best captures the distribution of the conditional variable among all PDFs under study. A priori …
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