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 11 of 11 for “"FFD"”.
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Analysis Driven Shape Design of Parametric Geometry Using B-Splines and Free-Form Deformation
… on this method, using free-form deformation (FFD) to morph geometry within an FFD box. Analytic geometry inside the FFD box which is not by default defined by B-splines is converted to a B-spline representation, and free-form deformation is then used to move the B-spline control point net. In …
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Optimization algorithms for loading military diesel generators
… (BA), cuckoo search (CS), first fit decreasing (FFD) bin packing, and an exhaustive search (ES) method. It is found that at large enough search spaces, the optimization algorithms can discover reasonably optimal solutions while substantially decreasing search time. For this application, FFD has …
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Shape Optimization of Annular Combustors with an Open Source Parallelized Thermoacoustic Helmholtz Solver
… we then introduce the Free Form Deformation (FFD) technique to handle more complex thermoacoustic systems for industrial applications. We study three geometries: Rijke tube and LPP combustor geometries, which are relatively simple demonstration cases, and an industrial aeroengine combustor …
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Asymptotic Worst-Case Analyses for the Open Bin Packing Problem
… First, we consider the First Fit Decreasing (FFD) which is a good approximation algorithm for the bin packing problem. We prove that its asymptotic worst-case performance ratio is no more than 3/2. We observe that its performance for the OBPP is worse than that of the BPP. Consequently, we …
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Neuronale und gliale Reaktionen nach Fimbria -Fornix-Durchtrennung : zur Rolle von CNTF und LIF
… CNTFR alpha wird nach FFD spezifisch von GABAergen septohippokampalen Projektionsneuronen hochreguliert. Cholinerge Neurone des MS/DB exprimieren den Rezeptor hingegen nicht. CNTF wird im Septumkomplex postläsional von reaktiven Astrozyten exprimiert. 2. Die LIF-bindende …
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Development of Ti-Si-N and Ta-Si-N as diffusion barriers
… parameters. A fractional factorial design (FFD) method was used to identify the significant deposition variables for the Ti-Si-N film deposition. The properties of the films as diffusion barriers between Cu and Si were studied using sheet resistance measurements, X-ray diffractometry (XRD), …
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Promoting material circularity in pulp and paper mills: organic-inorganic cellulosic composites for slow-release of nutrients
… a 2(⁵¯²) fractional factorial design (FFD) screened five factors, including binder content, initial water content, hydraulic press pressure, CaCO₃ filler content, and coating solution concentration. A central composite design (CCD) was conducted using the significant factors identified …
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Congestion control, energy efficiency and virtual machine placement for data centers
… resource aware first-fit decreasing (DRR-FFD), individual DRR-FFD (iDRR-FFD) and dominant residual resource based bin fill (DRR-BinFill), are proposed for virtual machine (VM) consolidation. The proposed heuristic algorithms exploit the heterogeneity of the VMs' requirements for different …
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Isogeometric Design, Analysis and Optimisation of Lattice-Skin Structures
… structures using the free-form deformation (FFD) technique is studied. The corresponding shape sensitivity of lattice-skin structures is derived. The geometry update of the lattice-skin structure is determined by the deformation of the FFD control volume, and in this process the coupling …
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Development of a statistical shape and appearance model of the skull from a South African population
… 2) Development of a free-form deformation (FFD) model for establishing correspondence across the training dataset; and 3) Development and validation of a SSM from the corresponding dataset. The SSM was validated using the leave one-out cross-validation method. The first eight principal …
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Is it top-down or bottom-up? an evaluation of processes involved in salience and decision making utilising eye-tracking consumer neuroscience research
… Duration (TFD), First Fixation Duration (FFD) and Time to First Fixation (TTFF) with regards to decision-making. Despite the role of the visual attention processes in consumer decision making, eye-tracking and visual attention processes should be used alongside other market research tools …