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Showing 1 to 20 of 33 for “"Two-Dimensional Models"”.
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Two-dimensional models of goal-oriented trial-to-trial error correction dynamics for a redundant goal : a constructive comparison
… controlled tasks of repeated movements. Simple models of repeated movements help us understand how the control of movements and the inherent noise in a system interact and influence the measurable variability in the outcome movements (the task). Here, we compare contemporary models for …
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Pagenumber problem.
… can be embedded. A literature review of the one dimensional pagenumber problem is presented, and several two dimensional pagenumber models are proposed. Evolutionary computing methods on problems whose solution space comprises of permutations are reviewed. Since the pagenumber problem is known to …
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Numerical Analysis of the Effects of Void Growth and Crack Tip Opening on Ductile Fracture
… of ductile fracture has been examined using two-dimensional models. However, some problems in ductile fracture are inherently three-dimensional. In this work three such problems are solved using large deformation finite element computations.
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ΑΡΙΘΜΗΤΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΤΡΙΔΙΑΣΤΑΤΗΣ ΠΑΡΑΚΤΙΑΣ ΚΥΚΛΟΦΟΡΙΑΣ ΜΕ ΑΛΓΕΒΡΙΚΟΥΣ ΜΕΤΑΣΧΗΜΑΤΙΣΜΟΥΣ
… NUMERICAL SCHEME DEVELOPED TO SOLVE THE THREE-DIMENSIONAL AND TWO-DIMENSIONAL MODELS. THE VERACITY OF THE MODEL IS CHECKED BY ITS APPLICATION TO A SIMPLIFIED FLOW DOMAIN AND TO THESSALONIKI BAY AND WITH COMPARISON WITH IN-SITU MEASUREMENTS AND RESULTS OF OTHER ALGORITHMS.
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Gravity profile evaluation of geological cross-sections through the Southern Appalachians in Frederick County, Virginia
… theoretical gravity profiles calculated from two dimensional models of density distribution based upon the cross sections. Using the cross section geometry and densities published for the known and inferred rock units, the theoretical gravity profiles did not compare favorably with …
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Models of interseismic deformation with an analytic framework for the inclusion of general linear viscoelastic rheologies
… postseismic and interseismic deformation using two-dimensional models of a vertical strike-slip fault in an elastic layer over a viscoelastic region. Central to this, I derive an analytic framework to include general linear viscoelastic theologies into models of interseismic deformation. Models …
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Refined and advanced shell models for the analysis of advanced structures.
… the aforementioned structures appear as two-dimensional and they are known as shells. The advent of new materials in aerospace structures and the use of multilayered configurations has led to a significant increase in the development of refined theories for the modelling of shells. …
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Design and use of an environmental control platform for studying vascular cell function in three-dimensional scaffolds
… muscle cells have been extensively studied in two dimensional models and the physiologic factors that affect their function and survival have been well documented. In living organisms, vascular tissue, consisting primarily of endothelial and smooth muscle cells, grows in three dimensions where …
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Core loss characterization and design optimization of high-frequency power ferrite devices in power electronics applications
… to account for losses at high frequencies. Two models of losses in ferrites are proposed, one with emphasis on analysis of loss mechanisms, and the other with an emphasis on the design of high-frequency magnetic components. Both models include the important effect of static bias field, which …
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Modeling injection and extraction wells for seawater desalination in SEAWAT
… In this study, we developed groundwater models in SEAWAT, a three-dimensional finite difference groundwater model capable of simulating a varying-density environment, to learn about the interactions of seawater, brackish water, freshwater and brine due to extraction and injection …
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On a class of strain gradient plasticity theories : formulation and numerical implementation
… developed and numerically implemented: * A one-dimensional theory to understand the basic nature of strain gradient theories; * A small deformation crystal plasticity theory; * A small deformation theory for isotropic viscoplastic materials; and, * A large deformation theory for isotropic …
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Modeling the performance of the piston ring-pack with consideration of non-axisymmetric characteristics of the power cylinder system in internal combustion engines
… but is out of the capabilities of the existing two-dimensional models. In this work, three separate but closely related numerical models were developed to study the performance of the piston ring-pack. The model for static analysis was developed to facilitate the design of piston rings. In this …
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Micro/nanoscale modeling of anisotropic mechanical properties of polymer/layered-silicate nanocomposites
… on the observed enhancements is explored. Two-dimensional models of various representative volume elements (RVEs) of the underlying structure of the polymer nano-clay composite are constructed. These models are characterized by clay particle volume fraction and micro/nano scale …
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Multiphase flow and mass transport through porous media
… with the theory of mass transport, in a three-dimensional setting. Galerkin's method is employed to derive the finite element formulations for multiphase flow and mass transport based on the appropriate governing differential equations. The equations for multiphase flow are based on van …
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Analysis, Modeling, And Simulation Of The Tides In The Loxahatchee River Estuary (Southeastern Florida).
… Management District explore the development of a two-dimensional, depth-integrated tidal model for the Loxahatchee River estuary (Southeastern Florida). Employing a large-domain approach (i.e., the Western North Atlantic Tidal model domain), two-dimensional tidal flows within the Loxahatchee River …
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Evaluation of force distribution within a dual special moment-resisting and special concentric-brace frame system
… was measured by comparing individual system models’ data and combined system models’ data. The data used for comparison included joint deflections (both horizontal and vertical), induced moments at moment connections, brace axial loads, column shears, and column base reactions. …
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Formation and stability of the solar tachocline in MHD simulations
… This is a new finding as compared to the earlier two dimensional models which estimated the solar differential rotation (about 28\%) to be marginally stable or even unstable. The changed stability limit is attributed to the changed stability criterion of the 3-dimensional model which also involves …
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Numerical Solutions for Two- and Three-Dimensional Non-Reacting Flowfields in an Internal Combustion Engine
… specific heat, with both viscous and inviscid models considered. Two- and three-dimensional engine models are examined, with the three-dimensional models including both rectangular and cylindrical geometries. The difficulties associated with obtaining numerical solutions in cylindrical …
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Reproducing and Quantifying Spatial Flow Patterns of Ecological Importance with Two-Dimensional Hydraulic Models
… hydrologic conditions, is poorly understood. One-dimensional (1-D) hydraulic models and two-dimensional (2-D) models that do not explicitly incorporate meso-scale topographic features are not capable of adequately reproducing the flow patterns found in channels having complex topography. Moreover, …
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Evaluating Ecological Influences of Altered Flow Regimes Using Two- and Three-Dimensional Hydrodynamic Models
… rare. In this dissertation, the ability of two- (2-D) and three-dimensional (3-D) hydraulic models to reproduce the localized complex flow features at steady base and peak flows is examined first. The performance of the two hydraulic models is evaluated by comparing the numerical results …
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