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 14 of 14 for “"kernel estimates"”.
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Heat kernel estimates on glued spaces
In this thesis, we prove heat kernel estimates in two main contexts: (1) manifolds with ends with mixed Dirichlet and Neumann boundary condition and (2) infinite (countable) graphs satisfying certain properties, which we call book-like graphs. In both of these settings, we start with ''sufficiently …
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Heat kernel estimates for elliptic operators with Robin boundary conditions
… conditions ∂νu + βu = 0. We show that the kernel for the semigroup generated by −A satisfies Gaussian and Hölder Gaussian bounds given domain and coefficients regularities. In particular we show that when the domain is Lipschitz and the principal coefficients are real, then the kernel is …
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Some topics on robust nonparametric regression and regression quantiles
Local kernel estimates and B-spline estimates are considered in the nonparametric regression and the generalized linear models. The consistency and asymptotic normality of kernel estimates are proved. Simulations on B-spline estimates for nonparametric regression and generalized linear models are …
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Energy methods for nonsymmetric nonlocal operators
… Our main results contain Hölder regularity estimates, full Harnack inequalities, and two-sided heat kernel estimates, which we obtain by extending recently established nonlocal energy methods. We are able to connect the theory of nonsymmetric nonlocal operators with the important results of …
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On-diagonal heat kernel bounds and volume growth on Riemannian manifolds
We investigate heat kernel estimates of the form $p_{t}(x, x) ≥ c_{x}t^{−α}$, for large enough $t$, where $α$ and $c_{x}$ are positive reals and $c_{x}$ may depend on $x$, on manifolds having at least one end with a polynomial volume growth.
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Estimador do Tipo Núcleo para Densidades Limites de Cadeias de Markov com Espaço de Estados Geral
… work we studied the consistency for a class of kernel estimates of f f (.) in the Markov chains with general state space E C Rd case. This study is divided into two parts: In the first one f (.) is a stationary density of the chain, and in the second one f (x) v (dx) is the limit distribution of …
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Bias reduction in nonparametric hazard rate estimation
… literature. Initiated by recent developments in kernel density estimation we distinguish and extend three popular bias reduction methods to the hazard rate case. A usual problem of fixed kernel hazard rate estimates is their poor performance at endpoints. Noticing the automatic boundary adaptive …
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Radiotelemetry and Behavioral Ecology of Neonate Southern Pacific Rattlesnakes
… the preferred smoothing parameter for fixed kernel estimates. The neonates remained surface-active during the winter, with none overwintering communally. These findings demonstrate that individual snakes can be tracked successfully as neonates and, with further effort, throughout their …
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On intrinsic ultracontractivity of perturbed Levy processes and applications of Levy processes in actuarial mathematics
… Essentially, the methods rely on the heat kernel estimates of the fundamental solutions of the operators as well as the Levy systems of the corresponding processes.
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Homogenization of Random Media: Random Walks, Diffusions and Stochastic Interface Models
… results, in particular scaling limits and heat kernel estimates, for random processes moving in random environments and for stochastic interface models. The first chapter will survey recent research and introduce three models of interest: the random conductance model, the Ginzburg-Landau ∇φ …
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New methods for econometric inference
… moment inequalities based on studentized kernel estimates of moment functions. The test automatically adapts to the unknown smoothness of the moment functions, has uniformly correct asymptotic size, and is rate optimal against certain classes of alternatives. Some existing tests have …
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DNA-based Population Estimation, Harvest Vulnerability, and Home Range Dynamics of Black Bears in Western Maryland
… estimate (0.25 bears/km2) is comparable to other estimates from southeastern and mid-Atlantic states. Our sampling approach did lead to more efficient sample collection, with more hair samples collected at snares located in areas with predicted high or medium probability of bear occurrence than …
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Evaluation of an Augmentation of Rocky Mountain Bighorn Sheep at Badlands National Park, South Dakota
… 3) dispersal, 4) 95% and 50% adaptive kernel, fixed kernel, and minimum convex polygon home-range size, 5) 95% and 50% adaptive kernel planimetric and surface area estimates, 6) interannual variation in home-range size, 7) habitat use, 8) escape terrain and buffer terrain, 9) an animal …
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Ecology and morphology of the Kalahari tent tortoise, Psammobates oculifer, in a semi-arid environment
… further per day than did females, but home range estimates did not differ between sexes. Annual home range estimates varied substantially among individuals: 0.7–306 ha for minimum convex polygons and 0.7–181 ha for 95% fixed kernel estimates. The ability to cover large areas would assist tortoises …