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 20 of 43 for “"decimation"”.
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Unstructured surface and volume decimation of tessellated domains
… triangulation, or a 3D tetrahedrization. The decimation algorithm enforces Dirichlet boundary conditions, uses only existing vertices, and assumes manifold geometry. Local dynamic vertex removal is performed without history information while preserving the initial topology and boundary …
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Mutiplierless decimation and commercial postfiltering of a discrete-time signal
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Sparsity and computation reduction for high-rate visual-inertial odometry
… paid to the simple yet ubiquitous heuristic of decimation. This thesis shows that decimation produces graphs with an inherently sparse, partitioned super-structure. Furthermore, it is shown analytically for single-landmark graphs that the even spacing of observations characteristic of decimation …
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A wavelet-based CMAC for enhanced multidimensional learning
… other receptive field shape. The effects of decimation from state-space to weight space are examined in detail. This analysis shows CMAC to be an adaptive lowpass filter, where the filter dynamics are governed by the generalization parameter. A more general CMAC is derived using wavelet-based …
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Various Opinions Which Prevailed Among the Fathers of the North African Church Concerning the Treatment to Be Accorded to the Lapsi, as Shown in the Correspondence of Saint Cyprian
… to Scapula, the Proconsul, could boast that the decimation of the Christians of Carthage would result in a frightful decline in the population of that city.
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Design of software radio
… software functions, while other functions like decimation, interpolation, digital up-conversion and digital down conversion are done on reprogrammable Digital Signal Processor or Field Programmable Gate Arrays.Twelve laboratory exercises have been designed to lead the student through the process …
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Renormalization-group theory of correlated electron systems
… the effectiveness of the Suzuki-Takano quantum decimation method on a d = 1 Hubbard model in an external magnetic field, where exact results for the specific heat, magnetic and charge susceptibilities are available at various electron densities. We find that our approach converges to the exact …
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Utilizing I/Q data to enhance radar detection and accuracy metrics
… of advanced algorithms designed to address data decimation, parallelization of processing, and novel detection and filtering techniques among others. These algorithms are developed and optimized through post-processing existing MIT-LL sensor data in MATLAB.
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Zjednodušování polygonálních sítí a optimalizace vykreslování pomocí technik Level of Detail
… polygonálních sítí, konkrétně Vertex Decimation, Vertex Clustering, Floating Cell Clustering a Quadric Error Metrics. Tyto metody jsou následně porovnány pomocí metrik Hausdorffovy vzdálenosti a RMSE (Root Mean Squared Error). Výsledky prokazují, že nejvyšší geometrickou věrnost …
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Custom High-Speed ADC for mmWave Digital Beamformers
… ADC and the digital systems has an 8x polyphase decimation filter to down sample the output of the ADC bit stream by a factor of 8. The maximum achievable SNDR for the Delta-Sigma stage was 24.7dB with a dynamic range of 27dB. This ADC prototype aims to demonstrate the feasibility of using …
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Pipelined oversampling analog-to-digital converters
… reduced sensitivity to thermal noise, simplified decimation, and reduced circuit speed, which permits voltage scaling and use of low-power technologies. Circuit techniques for implementation of a pipelined oversampling converter are also presented. Although CCDs are not essential to the concept, …
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Patrick County, Virginia and the Civil War, 1860-1880
… in Virginia, Patrick managed to escape physical decimation from war. In fact, no battles occurred in the county and Federal troops only invaded the county once in four years. Nevertheless, the Civil War came home to Patrick in a variety of ways: men were killed, livestock and crops impressed, and …
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The status and seasonal dynamics of fish and benthic invertebrate populations in relation to organic and inorganic material inputs and surface mining impacts in three Virginia headwater streams
… of headwater streams are naturally subject to decimation by flooding, but sediment-mediated habitat and food degradation may further limit invertebrate and fish populations in disturbed systems. This study demonstrates that sedimentation can be a severe and long-term after-effect of surface …
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Low power, reduced complexity filtering and improved tracking accuracy for GNSS
… (ADC)by the filters associated with the decimation process. The power dissipation and the hardware complexity of the decimator can be reduced substantially by using a minimum-phase Infinite Impulse Response (IIR) filter. For Global Positioning System (GPS) civilian signals, the use of IIR …
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Searching For FFLO States in Ultracold Polarized Fermi Gases: A Numerical Approach
… quasi-exact scheme, time-evolving block decimation (TEBD), is introduced for the comparative studies with the solution of the time-dependent BdG equation. Our results predict that the existence of FFLO states will leave conspicuous signatures in the density profiles during the expansion. …
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Inversion for subbottom sound velocity profiles in the deep and shallow ocean
… zeros of the AR characteristic polynomial. The decimation of the pressure field defined in a discrete range grid is analyzed as a tool to improve AR estimation. The nonlinear eigenvalue inverse problem of estimating the svp from a sequence of eigenvalues is solved by iterating linearized …
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Seismic-Style Processing of Numerical Em Data
… EM-Radon is shown to be robust to noise, and to decimation of the receivers, and of the time-sampling. EM-Radon’s sensitivity is explored to depth, thickness, and resistivity of the reservoir; T-equivalence is confirmed. These calculations demonstrate that, in simple cases, numerical CSEM data, …
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Real-time simulation and visualisation of cloth using edge-based adaptive meshes
… approaches is they do not often consider the decimation or coarsening of previously refined areas, or otherwise are not fast enough for real-time applications. A novel edge-based adaptive mesh is developed for the fast incremental refinement and coarsening of a triangular mesh. A mass-spring …
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Quality control tools for interactive rendering of 3D triangle meshes
… on the field of multiresolution analysis through decimation. We evaluate the quality of models generated through various simplification algorithms to develop efficient measures of image quality. We develop an application for selective, progressive and view-dependent refinement, suitable for …
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Ancient stonewall fish traps on the south coast of South Africa : documentation, current use, ecological effects and management implications
… complexes of up to 25 traps. Vywers are prone to decimation by wave action and storm damage and so require maintenance to retain their characteristic form and associated cultural information. Tensions have, however, arisen between those who maintain and fish the vywers, and fisheries managers. …
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