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 “"prefilter"”.
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Development of adsorption filtration process for virus removal for drinking water treatment
… overcome the adverse effects of NOM, a special prefilter, to be placed upstream of the virus filter, was developed using large calcite particle size, about 600 microns. This was possible because NOM molecules are approximately 15 times smaller than viruses, and accordingly, their diffusivity is …
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System level simulation of digital designs : a case study
… processing was divided into the presurnmer and prefilter, it was logical that the hardware be similarly divided. One of the first design issues to be overcome was how these two entities should interact. Both required the use of external RAM to facilitate temporary data storage. The first method …
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Passive estimation of underwater maneuvering targets
… problems. To overcome this, a nonlinear prefilter is added to linearize the measurements and thus allow the use of a conventional Kalman Filter which makes the tracking system more 'robust' and also decouples the depth estimator from the polar range estimator. The depth estimator is …
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Microprocessor-based soft variable structure control for D.C. motor speed regulation
… are presented in the aspects of sample rate, prefilter design, hardware selection, and microprocessor arithmetic operation. Simulation and experimental results showed good performance in negative speed range, but this controller created unwanted high armature current fluctuation in positive …
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Examination of selected passive tracking schemes using adaptive kalman filtering
… This paper discusses a new approach which uses a prefilter to linearize the measurements so that they can be processed by a standard Kalman filter. The approach is subsequently expanded for use with an adaptive Kalman filter which allows source maneuvers to be tracked. A new approach to passive …
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Extraction and usage of crystallographic knowledge for refinement and validation of molecular models /
… of input data. Software has been developed to prefilter the records from the COD, transform them to a form appropriate for geometric analysis, extract and organise the geometric parameters. Statistical models chosen to describe the groups of chemically similar observations can be used for …
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A model-following digital control law for an EBF-STOL aircraft
… some desirable reference model, thus making it a prefilter to the plant. The model chosen for this research is that of a B-26 aircraft. The longitudinal equations of motion of the STOL aircraft are linearized about a preselected point of the flight regime and written as linear state equations. A …
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Household scale slow sand filtration in the Dominican Republic
… one of which was paired with a geotextile prefilter used in the construction of the Peruvian Table Filter. The study revealed that thermotolerant coliform removal rates by the BioSand filter without
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A near-infrared filter system and study of solar umbral dots at 1.6 µm
… this work. This system includes an interference prefilter (FWHM - 40 [Angstrom]), a liquid crystal magnetic analyzer, a near-IR bireffingent filter (FWHM - 2.5 [Angstrom]), a near-IR Fabry-Perot filter (FWHM - 0.12 [Angstrom]), a near-IR InGaAs camera and an image processing computer. The most …
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Adaptive signal subspace digital receivers for communication in time-varying noise
… a pre-filter consisting of a unity gain with a prefilter that linearly combines k M x 1 partitions of the transmitted signal vector (i.e. transmitted signal vector of length N = k x M). Proper design of the transmitted signals can ensure that the partitions are linearly independent. In this …
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Non-data aided digital feedforward timing estimators for linear and nonlinear modulations
We propose to develop new non-data aided (NDA) digital feedforward symbol timing estimators for linear and nonlinear modulations, with a view to reducing the sampling rate of the estimators. The proposed estimators rely on the fact that sufficient statistics exist for a signal sampled at the …