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.
Results
Showing 1 to 14 of 14 for “"Baseline Drift"”.
-
An algorithm for extracting the PPG Baseline Drift in real-time
… be extracted. One such challenge is removing the baseline drift of the signal, which is caused by respiratory rate, muscle tremor and physiological changes within the body as a response to various stimuli. Over the years there have been many methods developed in order to condition the signal such …
-
A Comparative Analysis of Methods for Baseline Drift Removal in Preterm Infant Respiration Signals
… upon effective noise reduction, specifically baseline drift removal. Baseline drift originates from several sensor-based factors, including thermistor placement within the sensor and in relation to the infant nares. This work compares four methods for baseline drift removal using the same …
-
QUANTIFICATION OF PRETERM INFANT FEEDING COORDINATION: AN ALGORITHMIC APPROACH
… to effective event detection was significant baseline drift. The frequency components of the baseline drift overlapped significantly with the breath event frequency components, so a time domain solution was developed. Several methods were tested, and it was found that the acceleration vector …
-
Printable and Machine Intelligent 0D/2D Materials Gas Sensor Arrays
… slow response, poor sensitivity, and baseline drift at room temperature. In this thesis, I present printable and hybrid aerogels as high-performance GSAs. These sensors, based on graphene and zero-dimensional (0D) quantum dots (QDs), are capable of intelligent and robust trace-level …
-
Understanding the Sources, Atmospheric Evolution and Radiative Effect of Brown Carbon Aerosol Particles
… BrC measurements in airborne campaigns, but baseline drift and signal hysteresis were observed. A possible approach to correct the baseline drift and hysteresis effect was proposed, along with possible methods for future improvements for these systems.
-
A Device Compatible with Functional Magnetic Resonance Imaging for Assessing Brain Activity During a Finger Force Tracking Motor Task
… providedaccurate force measurements with minimal baseline drift, and operated with sufficiently small time delay. The sensor was then compared in an able-bodied subject to a similar position-tracking task from the literature. Force tracking elicited a greater spatial extent of neural activation, …
-
Development and application of a 4-dimensional Computed Tomography simulator
… of scan start time shift, breathing trace baseline drift, and hysteresis of internal organ and abdominal surface motion on the quality of 4D CT images. While 4D CT significantly reduces artifacts from helical scans of the thoracic and abdominal areas, a variety of different sources can …
-
Pd-Ag Catalyzed Aza-Piancatelli Reaction: From Synthesis to Mechanistic Investigations
… due to metallic deposition on the probe and baseline drift in spectra, further GCMS based investigations revealed the presence of an N-substituted intermediate. At elevated temperature, a faster reaction rate was observed compared to room temperature. The Hammett plot analyses resulted in a …
-
A wearable heart monitor at the ear using ballistocardiogram (BCG) and electrocardiogram (ECG) with a nanowatt ECG heartbeat detection circuit
… at the chest and the ear in the presence of baseline drift, muscle artifact, and signal clipping.
-
Algorithm for Spectral Matching of Earthquake Ground Motions using Wavelets and Broyden Updating
… for the proposed method. The study include the baseline drift, the frequency and time resolution, and the cross correlation between wavelet adjustments during the spectra matching procedure. Based on this study, the corrected tapered cosine wavelet was selected to be used in the proposed …
-
Graphene Inkjet Integrated Intelligent Sensors and Systems
… challenges like high power consumption, severe baseline drifts, and cross-analyte interferences, compromising the detection accuracies. Recently, 2D nanomaterials and their functionalization with metal oxides (MOx) have become attractive for high performing sensors. Solution processing of these …
-
PROCESSING AND CLASSIFICATION OF PHYSIOLOGICAL SIGNALS USING WAVELET TRANSFORM AND MACHINE LEARNING ALGORITHMS
… addition, the method is robust against noise and baseline drift, as supported by the results. The second part outlines a method that extract features from ECG signal in order to classify and predict the severity of arrhythmia. Arrhythmia can be life-threatening or benign. Several methods exist to …
-
Collaborative Estimation in Distributed Sensor Networks
… inference. For example, the phenomenon of sensor drift is ubiquitous in applications such as air-quality monitoring, oceanography and bridge monitoring, where calibration is often difficult and costly. This dissertation provides an analytical framework linking the state of calibration to the …
-
Raman Chemometric Method for Fuel Property Prediction
… Normal Variate normalization to suppress baseline drift and multiplicative effects. Group-aware data splits kept replicate scans within a single fold to avoid leakage and to produce honest estimates of generalization. Two complementary modeling approaches were pursued. The first is a …