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 15 of 15 for “"Pre-filtering"”.
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Trainable Pre-Filtering for Deep Neural Networks and Applications
… performance in vision-based perception and prediction tasks; however, many modern deep neural networks depend heavily on large labeled datasets and purely data-driven feature learning, which limits robustness, efficiency, and real-world deployability, especially in noisy, data-scarce, and …
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Development of a Terrain Pre-filtering Technique applicable to Probabilistic Terrain using Constraint Mode Tire Model
… model (e.g. point follower tire model) and a pre-filtered terrain profile as equivalent input will considerably reduce the simulation time. The desired produced responses would be nearly identical to the ones using a complex tire model and unfiltered terrain, with a significant computational …
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Interaction between membrane and protein properties on flux decline during sterile microfiltration
… The experiments were operated with a feed pressure of 2 or 10 psi. Each of the proteins was tested at 0.1 and 2 g/L with uncoated PTFE. No flux decline was seen using 0.1 g/L, so 2 g/L was focused on for PVA coated PTFE, PVA coated PVDF and uncoated PVDF membranes. Protein fouling of the …
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Low-jitter symbol timing recovery for M-ary QAM and PAM signals
… Franks and Bubrowski introduced highpass prefiltering and symmetric bandpass post-filtering for jitter-free operation of a symbol timing recovery scheme using a squarer for binary signaling. We show that the same conditions are also applied to M-ary PAM or QAM signals. In this work, we …
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Wideband reconfigurable antennas
… modes. The approach also offers additional pre-filtering to the front-end, which reduces the interference levels at the receiver, giving them a significant advantage over fixed non reconfigurable transceivers. Wideband-narrowband reconfiguration is potentially useful for future wireless …
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Adaptive signal subspace digital receivers for communication in time-varying noise
… a MAMF receiver consists of two stages - a filtering stage and a detection stage. We develop the general design expressions for a three-stage MAMF receiver in which the additional stage is a linear pre-filter placed before the filtering and detection stages. Obviously, if the MAMF is optimal …
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Extraction of surface texture data from low quality photographs to aid the construction of virtual reality models of archaeological sites
… a combination of existing techniques for pre-filtering and calibrating the casual photograph, boundary detection and ultimately texture adjustment. The technique implemented for calculating the locations of occluded comers using minimisation of least square errors is new. The tool has been …
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A machine vision-based approach to measuring the size distribution of rocks on a conveyor belt
… process. This process involves image pre-filtering with edge preserving filters at various degrees of filtering. The output of each filtering stage is retained and marker-driven watersheds are applied on each output resulting to traces of detected rock boundaries. Watershed boundary …
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PARALLEL ARCHITECTURES FOR REAL-TIME SAR RANGE-DOPPLER PROCESSING AND QUALITY AUTOMATIC FOCUSING ALGORITHM
… designs for both the front-end video pre-filtering and systolic image formation are proposed. We named this HEMPSAR, which is the acronym for "Highly Efficient, Massively Parallel SAR processor. The SAR preprocessor is characterised by simultaneous DC bias cancellation and azimuth …
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Adaptive Security In Computer Networks
… and integrating them together. This dissertation presents a adaptive framework for Network Intrusion Detection System with the capability to detect unknown attacks, reconfigurable to new technologies, adaptable to network traffic, and easily updating. The key idea is by adding network analyzers …
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Fast head profile estimation using curvature, derivatives and deep learning methods
… a significant speedup in execution time where pre-filtering of a sampled dataset was required. Following on from this, a new dataset of head profile contours was generated and annotated with anthropometric cranio-facial landmarks, and a novel method of automatically improving the accuracy of …
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A Geospatial Service Model and Catalog for Discovery and Orchestration
… services with existing orchestration tools is presented. Geospatial services are automatically translated into SOAP/WSDL services by a portable service wrapper. Their data layers are exposed as atomic functions while WSDL extensions provide syntactic metadata. Compliant services are modeled …
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Improving ultrasonic imaging using novel coded excitation techniques
… Recently, a novel coded excitation and pulse compression technique, known as Resolution Enhancement Compression (REC), was developed. REC enhances the -6 dB bandwidth of an ultrasonic imaging system. In this dissertation, the limitations of the REC technique were explored and specific imaging …
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Extraction of Input Parameters for the Theory of Radiative Energy Transfer Using Deconvolution.
… radiowave propagation when affected by the presence of a variety of obstacles. In particular if the obstacles take the shape of vegetation volumes, like single trees or groups of trees and are present in the radio path, they give rise to absorption and scattering of radio signals. This …
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Acquisition systems and decoding algorithms of peripheral neural signals for prosthetic applications
… feedback about the surrounding world in terms of pressure or temperature acquired by tactile biosensors placed at the surface of the cybernetic hand. It in fact allows to execute involuntarymovements when for example the armcomes in contact with hot objects. The development of such a closed-loop …