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 32 for “"High-Pass Filter"”.
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Application of non-uniform sampling techniques to digital filter synthesis
… sampling technique as applied to digital filter designs will be made. The objective of the design is to reduce the interference problems as one would· encounter in using uniform sampling technique in the synthesis. An analysis of the error function which measures the goodness in …
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Analysis of Multiresolution Data fusion Techniques
… a relatively coarse-resolution image with a higher resolution panchromatic image of the same geographic area. This study examines properties of fused images and their ability to preserve the spectral integrity of the original image. It analyzes five current data fusion techniques for three …
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Habituation of the Goldfish Vestibulo-Ocular Reflex Is Frequency Specific and Nonlinear: An Experimental and Modeling Study
… decreased the time constant of the VOR high-pass filter model to simulate habituation, suggesting that habituation is a general phenomena. The present experiments in goldfish show that habituation is both nonlinear and nonstationary and is quite effective at low-frequencies. Habituation …
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System (for) Tracking Equilibrium and Determining Incline (STEADI)
… classification. For the processing both a median filter and a high pass filter are used. A Median filter is used to amplify/enhance the signal by removing impulsive noise while preserving the signal shape while the High pass filter is used to emphasise transitions in the signal. Then, in order to …
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Design and Testing of Off-The-Shelf Electronic Components for an Acoustic Emission Structural Health Monitoring System Using Piezoelectric Sensors
… uses the principles of active lamb wave and passive acoustic emission through the use of piezoelectric sensors as the sensing elements. Piezoelectric sensors can be used both as an input device and as a sensing element. This research focuses on the development of the major data acquisition …
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Assessing Satellite Image Data Fusion with Information Theory Metrics
… in remote sensing is estimating an image with high spatial and high spectral resolution given separate sources of measurements from satellite instruments, one having each of these desirable properties. This thesis presents a survey of seven families of algorithms which have been developed to …
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Monocular vision for collision avoidance in vehicles
… systems. The monocular system pairs a camera and passive lens with an active lens. Most active lenses require linear actuating systems to adjust the optical parameters of the system but this experiment employed an Optotune focus tunable lens adjusted by a Lorentz actuator for a much more reliable …
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Design of an Analog Adaptive Piezoelectric Sensoriactuator
… presents alternative analog LMS adaptive filtering methods which accomplish the same result. The main advantage of the proposed analog compensation scheme is its ability to more closely match the order of the adaptive filter to the assumed dynamics of the piezostructure using an adaptive …
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Hand and elbow gesture recognition based on electromyography signal
… is presented using a 6th order Butterworth band pass filter, low and high pass filter with normalization. Furthermore, the features are evaluated using Variance (VAR), Standard Deviation (SD) and Root Mean Square (RMS) to test the significance of the features. Nevertheless, the K-Nearest …
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Source distribution analysis of magnetic microscopy maps of geological samples
… demonstrates that Tikhonov regularization with a high pass filter matrix performs better than unregularized least square methods, truncated singular value decomposition, and Tikhonov regularization using an identity matrix (minimum norm). Our study also gives insight regarding the benefit and cost …
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Circuitos digitais e mistos CMOS com aplicação em medidor de energia
… an energy meter. The digital circuits uses a bypassing technique which avoids redundant calculations. This technique was applied in the low power multiplier, reducing its consumption by 40%. For the high-pass filter, the power consumption was reduced by 15%. And the low-pass filter had the …
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Modeling, identification and control of a quad-rotor drone using low-resolution sensing
… on the modeling and identification, control and filter design, simulation and animation, and experiments of an electrical-motor drive model-scale quadrotor --- the AR.Drone. Equations of Motion of drone’s model were derived from Kinemics and Dynamics of common quadrotors. The identification was …
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Effect of mobile phase additives on linearity in particle beam lc/ms
… in reduced particle size. Application of a high pass filter to a particle distribution replicates response factor and signal obtained by PB LC/MS. In addition, a mathematical model representing the linear response upon addition of a nonvolatile buffer has been successfully applied. Graphs …
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Statistical analysis of low level atmospheric turbulence
… the computer. A moving-average and differencing high-pass filter has been used to remove the possible trend in the time series. The nonstationarity of the time series was determined by applying a non-parametric statistical test on the statistical quantities of each block in the time series. The …
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A computational tool for microstrip planar filter design
Filters are very important part of any communication system. Naturally, RF and microwave systems belong to these systems. Microwave filters are needed in a wide range of applications including satellite communications and wireless communications as well as military applications. Planar filters …
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Defects and Rearrangements in Disordered Solids
… under strain. Disordered materials encompass a large variety of materials, including glasses, polymers, granular matter, dense colloids, and gels. There is currently no constitutive equation based on microscopic observables that describes these materials. Given the prevalence and …
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Design and control of a long stroke fast tool servo
… acceleration feedback controller consists of a high-pass filter, a double integrator for phase compensation, and an array of AFC resonators. For the base acceleration controller, the AFC resonators are placed in the feedback path and thus act as narrow-frequency notch filters. The notch filters …
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Digital pulse interval modulation for indoor optical wireless communication systems
… interference from a fluorescent lamp driven by a high-frequency electronic ballast, which is potentially the most degrading source of ambient light. It is found that such interference results in an average optical power requirement that is almost independent of the bit rate. The analysis then goes …
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On the spectral information content of vowels
… as the error rates of lax vowels are far higher than those of tense vowels. Lax vowels rarely occur in a CV context in English. This seems to be a novel observation. The second experiment, HL11, examines the effects of filtering, using low-pass or high-pass filters at various cut-off …
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Impact of Noise and Spike Initiation Properties on the Encoding and Transmission of Neural Information
… neural representations are not transmitted with high fidelity to downstream neurons. In both cases, properties of the input (its amplitude and kinetics) and properties of the neuron (its spike initiation mechanism and excitability) impact neural information processing. In my thesis, I first …
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