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Showing 1 to 20 of 153 for “"Step Size"”.
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Selection of Step Size for Total Variation Minimization in CT
… image. We propose a way to estimate an optimal step size so that the total variation is minimized. A new minimization problem is also proposed. Numerical tests are included to illustrate the improvement.</p>
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Adaptive step-size selection for tau-leaping simulation of stochastic particle coalescence
This study develops a group of new leap selecting procedures and accep- tance criteria for use with the tau leaping method for stochastically simulat- ing the particle coalescence problem. Existing work provides leap selection procedures for pre-leap methods and leap acceptance criteria for …
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Stability and Convergence of General Multistep and Multivalue Methods With Variable Step Size
Made available in DSpace on 2014-12-11T18:23:58Z (GMT). No. of bitstreams: 1 7317452.pdf: 2269726 bytes, checksum: aa8660db5bc1f1f6c55a6e98e94decc8 (MD5) Previous issue date: 1972
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GDSVD: Scalable k-SVD via Gradient Descent
… with a simple, universal rule for step-size selection provably finds k-SVD, i.e., the k ≥ 1 largest singular values and corresponding vectors, of any matrix, despite nonconvexity. There has been substantial progress towards this in the past few years where existing results are able …
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Shape Optimization of a Sandwich Composite Plate with Low-Velocity Impact Loading and Effect of Finite Difference Sensitivity Analysis
… (d) investigate the effect of finite difference step size on the final optimized design.</p> <p>A FE model of a plate was created to represent a part of the spacesuit's hard upper torso (HUT), which is made of a sandwich structure with S2 glass fiber composite (outer layers) and carbon fiber …
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Advanced Methods for Large and Long String/Set Similarity Searches
… Top-k overlap string similarity join: A step size-based algorithm is proposed to optimize traditional methods. Theoretical analysis verifies the positive effect of step size and identifies the optimal fixed step size, on the basis of which a fixed step size algorithm is designed. For …
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Adaptive iterative multiuser detection for wireless communication systems
… and backward filter coefficients with respective step-size constants. The classical approach to realizing interference mitigation was to set the forward and backward adaptation constants as the same. While this approach has provided interference mitigation at high SINR, it has been shown in this …
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The Application of Improved Numerical Techniques to 1-D Micellar/Polymer Flooding Simulation
… By using a semi-discrete method, the time step size can be controlled and varied to be as large as pos-sible without sacrificing accuracy. The stability limit can also be detected with this method. The method is tested and compared with the fully discrete method in various conditions such …
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Sampling and quantization for optimal reconstruction
… with the potential of different quantization step size in each channel and varied timing offsets between channels. Considering sampling together with quantization in the digital representation of the continuous-time signal is shown to be advantageous. With uniform quantization and equal …
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Transient method of characteristics via the Adiabatic, Theta, and Multigrid Amplitude Function methods
… problems to understand the effects of time step and spatial mesh sizes on the solution accuracy and run time performance. The shape function time step size had a large effect on the solution accuracy for the MAF and Theta methods in solving the LRA problem. All methods showed moderate …
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Multipath aided rapid acquisition
… achieving these limits. We prove that the fixed-step serial search (FSSS), with the step size N[sub]Q, achieves the near-optimal MAT. We also prove that the conventional serial search, in which consecutive cells are tested sequentially, and the FSSS with the step size N[sub]s - 1 should be …
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High Reynolds Number Turbulent Boundary Layer Flow over Small Forward Facing Steps
Measurements were made on three forward steps with step height to boundary layer ratio of approximately 3.8%, 15% and 60% and Reynolds number based on step height ranging from 6640 to 213,000. The measurements included mean wall pressure, single and 2 point wall pressure fluctuations, single and 2 …
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Data-driven adaptive learning systems
… we propose the concept of ""look ahead"" and ""step size"" to adaptively control content constraints in each item selection step. The step size gives a prediction of the number of items to be selected at the current stage, that is, how far we will look ahead. Two look-ahead content balancing …
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Efficient projection space updates for the approximation of iterative solutions to linear systems with successive right hand sides
… its potential is likely limited by the problem step size and the accuracy of the solver.
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A Variable-Step Double-Integration Multi-Step Integrator
… integration is presented here, the variable-step Stormer-Cowell method. The method uses error control to regulate the step size, so larger step sizes can be taken when possible, and is double-integration, so only one evaluation per step is necessary when integrating second-order differential …
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Full Newton Step Interior Point Method for Linear Complementarity Problem Over Symmetric Cones
… of this method lies in that it uses full Newton-steps, thus, avoiding the calculation of the step size at each iteration. By suitable choice of parameters we prove the global convergence of iterates which always stay in the the central path neighborhood. A global convergence of the method is …
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Study of Vortex Ring Dynamics in the Nonlinear Schrödinger Equation Utilizing GPU-Accelerated High-Order Compact Numerical Integrators
… combined with a fourth-order Runge-Kutta time-stepping scheme in order to keep the overall method fully explicit. To ensure efficient use of the schemes, a stability analysis is performed to find bounds on the largest usable time step-size as a function of the spatial step-size.</p> <p>The …
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Resistance Control MPPT for Smart Converter PV System
… are of inherited variable operating point step size with constant conductance or resistance perturbation step size. However, the operating point change decreases with resistance perturbation but increases with conductance perturbation otherwise. Therefore, resistance control MPPT is chosen …
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A Polynomial Based Iterative Method for Linear Parabolic Equations
… plane whose length and orientation depend on the step size and the parabolic operator itself. The simplicity with which these coefficients are obtained rests on special properties of the Chebychev polynomials.
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A three dimensional solution of the transient field problem suing isoparametric finite elements.
… coordinates and variations in time integration step size are permitted. Time dependent boundary conditions are not considered. Comparisons of theoretical and computer solutions for a variety of test problems demonstrate close agreement. Instructions for use of the program are included.
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