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 34 for “"Noise filtering"”.
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CPU Resource Management and Noise Filtering for PID Control
… the thesis deals with the design of measurement noise filters for PID control. The design is based on an iterative approach to calculate the filter time constant, which requires the information in terms of an FOTD model of the process. Tuning methods such as Lambda, SIMC, and AMIGO are used to …
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Fully-Integrated Control: Noise Filtering, Parameter Estimation, Disturbance Determination and Predictive Control of Biological Nonlinear Processes
… and covariance of a noisy signal, assuming the noise is Gaussian. While usually a state estimation method, this work presents a novel way to apply this method to parameter estimation by augmenting the dynamic model to include the parameters as states with a zero time derivative. This allows for …
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Robust Noise Filtering techniques for improving the Quality of SODISM images using Imaging and Machine Learning
… PICARD is one such satellite. Due to the noise associated with SODISM images, the clarity of these images and the appearance of solar features are affected. Image denoising and enhancement are the main techniques to improve the visual appearance of SODISM images. Affective de-noising …
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Profiling the metabolome using Fourier transform ion cyclotron resonance mass spectrometry, optimised signal processing, noise filtering and constraints methods
… The second method employed a three-stage noise filter. Finally, the mass spectra were analysed using constraints optimisation methods and utility theory. It was discovered that SIM-stitching increased the effective sensitivity of the instrument five-fold, allowing many more metabolites to …
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Integrative and Multi-scale Deep Learning for 3D Point Cloud Transmission Corridor Scene Segmentation: Noise Filtering, Attention-Fused Feature Integration, and Panoptic Network
… with atmospheric points has posed challenges in noise filtering and 3D point cloud quality. This dissertation proposes the Noise Seeking Attention Network (NSANet), a novel solution integrating psychological theories of feature integration and attention engagement. NSANet achieves a 4.10% …
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Signal reconstruction from discrete-time Wigner distribution
… distribution and their applications in noise filtering and signal separation. Various algorithms are developed to reconstruct signals from the modified or specified Wigner distribution and pseudo-Wigner distribution which generally do not have a valid Wigner distributions or valid …
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Peripheral perfusion imaging modeling
Effective clutter and noise filtering is critical for contrast-free ultrasonic per- fusion imaging. Novel pulsed-Doppler methods for perfusion imaging are val- idated using dialysis cartridges as perfusion phantoms. Techniques are exam- ined quantitatively at 5 and 12.5 MHz using phantoms with …
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AN ADAPTIVE AND SELF-COGNITIVE ACE FILTER
… are random, in nature and, contain wide band noise. Filtering of ACE signals to reduce the unwanted noise components is needed to reduce mechanical wear and provide smoother operation. The classical ACE filters now in use ate incapable of achieving a high noise, reduction ratio together with a …
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A new programmable low noise all digital phase-locked loop architecture
… far noisier than the external crystal types. The noise in the integrated oscillators forces designers to use larger loop bandwidths than would be required with less noisy VCO's; subsequently they have poor noise filtering capabilities. Additionally, analog PLL's are usually fixed in nature. Loop …
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Simultaneous visual and electro-cardiogram measurements of zebrafish embryos
… the heart rate including amplification, noise filtering and data manipulation. Noise was a significant obstacle in determining the zebrafish embryo's heart rate. Therefore, the signal was smoothed, digitally filtered, and a system transfer function was determined to extract the heart rate …
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High performance digital signal processing: Theory, design, and applications in finance
… data processing methods like compression and noise filtering tools enabling real-time analytics of big data is increasing. A common concern in digital signal processing applications has been the lack of fast handling of observed data. This problem has been an active research topic being …
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Development of an advanced aluminum thermal analysis system for the characterization of the 319 aluminum alloy solidification process.
… for later statistical evaluation. Methods of noise filtering and automatic temperature detection have all been improved over previous systems in order to reduce measurement error. Experimental work concluded that AITAS is capable of determining the degree of silicon modification as a result of …
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Development and evaluation of machine learning algorithms for biomedical applications
… approach to drug sensitivity prediction; a noise-filtering method for drug sensitivity prediction; and (iv) transfer learning approaches for enhancing the performance of drug sensitivity prediction. Substantial experiments are conducted to evaluate the effectiveness and efficiency of the …
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Simulation and optimization tools to study design principles of biological networks
… properties such as responsiveness and transient noise filtering. We discovered that non-linearity of the enzymatic cycle allows more effective filtering of transient noise. Furthermore, we found that networks with multiple activation steps, despite being less responsive, are better in filtering …
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Adaptive modal damping for advanced LIGO suspensions
… effort to the areas of disturbance rejection and noise suppression to measure these waves. The work in this thesis develops an adaptive modal damping control scheme for the suspended optics steering the laser beams in the LIGO interferometers. The controller must damp high quality factor …
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Stability-based, random matrix theory filtering of financial portfolios
This thesis describes research on filtering methods using RandomMatrix Theory (RMT) Models in financial markets. In particular, a novel, stability-based RMT filter is proposed and its potential, for reducing stock portfolio risk, is compared to two well-known alternatives. In terms of performance, …
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Mechanisms of Gradient Tracking During Yeast Mating
… interactions introduce considerable noise in instantaneous receptor occupancy, so it is thought that spatial information must be integrated over time to allow noise filtering. The mechanism of temporal integration is unknown. We used the mating response of the budding yeast, …
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Hand Pattern Recognition Using Smart Band
… is passed through analog front-end module for noise filtering and signal amplification. An ARM Cortex processor converts the analog EMG and accelerometer signal into digital and transmits to a PC via Bluetooth protocol. On the receiver section, the raw EMG and acceleration data is further …
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Speaker Dependent Voice Recognition with Word-Tense Association and Part-of-Speech Tagging
… the collaborative effort and research of noise-filtering, Speech Segmentation, Feature extraction, speaker verification and finally, Partial Language Modelling. The filtering process was accomplished using 4th order Butterworth Band-pass filters to dampen ambient noise outside normal …
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Phase projection using three satellites
… during the phase unwrapping process and the noise filtering step. In particular, as intuition would follow, we establish that the advantage of using three satellites over using just two in noise reduction means that using three satellites should be the way to go in all future work. In …
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