Global ETD Search
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Showing 1 to 10 of 10 for “"constant function"”.
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Local Likelihood for Interval-censored and Aggregated Point Process Data
… and implement the algorithms using a piecewise constant function. We demonstrate that the use of the piecewise constant function at the E-step explicitly results in an iteration that involves an expectation, maximization and smoothing step, or an EMS algorithm considered in Silverman, Jones, …
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Composition Sequences and Semigroups of Möbius Transformations
… and the Julia sets of iterates of analytic functions. We introduce the notion of a semidiscrete semigroup, and find that this property is akin to the discreteness property for groups. We study semigroups of Möbius transformations that fix the unit disc, and lay the foundations of a theory …
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Rapid Implicit Diagonalization of Variable-Coefficient Differential Operators Using the Uncertainty Principle
… materials, thus assuming general piecewise constant coefficients. This proposed method will avoid the modeling shortcuts that are traditionally taken, and it will generalize the piecewise constant case of energy diffusion and wave propagation to work for an infinite number of smaller pieces, …
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Models and algorithms for dynamic real-time freight train re-routing
… where rail terminal processing rate is a non-constant function of the traffic at the rail terminal. The above approaches are extended to address the problem variant. Computational results are presented for a comprehensive set of problem instances created using data from a class I railroad in …
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Eignefunctions for Partial Differential Equations on Two-Dimensional Domains With Piecewise Constant Coefficients
… it will be represented using a piecewise constant function, and this results in the formation of a complicated mathematical model. Such a model is impossible to solve analytically, and is very difficult to solve using existing numerical methods, thus the implementation of an alternative …
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The Solution of a Singular Integral Equation Arising From a Lifting Surface Theory for Rotating Blades
… distribution is approximated by a piecewise constant function and the integral equation is solved numerically by the method of collocation. Certain simplifying assumptions applied to the propeller blade model lead to a radical reduction in complexity of the solution methodology.</p> <p>This …
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Optimization of chemical plant simulation using double collocation
… and solution strategy. The objective functional can contain integral terms. The state and control variables can have time delays. Equalities and inequalities containing state and control variables can be included into the model as well as algebraic equations and inequalities. The …
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Experiment, thermodynamic properties and modeling on combustion of methyl tert-butyl ether : isobutane and isobutene and thermodynamic properties of chloro alkanes and alkenes
… B3LYP/6-31g(d) optimized geometries), density functional (B3LYP/631g(d)), semi-empirical MOPAC (PM3) molecular orbital calculations, and by group additivity estimation. Thermochemical kinetic parameters are developed for each elementary reaction path in these complex systems, and a chemical …
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Dynamics in Discrete Time: Successional Communities, Spatial Models, and Allee Effects
… This method approximates the growth function of the IDE with a piecewise-constant function, and I call the resulting model a block-pulse IDE. I write out analytic expressions for the iterates and equilibria of the block-pulse IDEs as sums of cumulative distribution functions. I …