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 431 for “"preprocessing"”.
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Fast and accurate visibility preprocessing
Currently, the standard approach to visibility preprocessing algorithms is to use a form of approximate solution, known as conservative culling. Such algorithms over-estimate the set of visible polygons. This compromise has been considered necessary in order to perform visibility preprocessing …
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Preprocessing for content-based image retrieval
The research focuses on image retrieval problems where the query is formed as an image of a specific object of interest. The broad aim is to investigate pre-processing for retrieval of images of objects when an example image containing the object is given. The object may be against a variety of …
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Generic FPGA Preprocessing for Astrophysics Instruments in HLS
… designs vary widely, they often share common preprocessing elements, including channel-level readout, pedestal subtraction, waveform integration, and zero suppression from front-end ADCs, as well as identification and centroiding of signal islands across groups of multiple channels. High-Level …
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Preprocessing of Biomass Using Mechanical, Chemical and Microbial Techniques
… materials in the production of biofuels. Various preprocessing techniques used in the preprocessing of biomass, such as microbial preprocessing, mechanical preprocessing and chemical pretreatment, are used for enhancing the digestibility of biomass to sugars for ethanol production. In this work, …
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Theoretical and practical advances in preprocessing based secure computation
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Automatic and adaptive preprocessing for the development of predictive models.
… the selection and optimisation of multiple preprocessing methods and predictors has been proposed. The combination of multiple data mining methods forming a workflow is known as Multi-Component Predictive System (MCPS). There are multiple software platforms like Weka and RapidMiner to create …
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Design of an integrated optical sensor with on-chip preprocessing
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1983.
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Learning with high dimensional data and preprocessing in non-stationary environments
The internet of things generates huge amounts of multidimensional sensor readings. The analysis of these high dimensional data is chal- lenging and not sufficiently addressed. In this thesis, methods to analyze such data are developed, evaluated and discussed. There are currently several open …
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Comparison between different techniques of preprocessing for resting state fMRI analysis
… Gaussian and Average are more suitable for fMRI preprocessing.
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Preprocessing Realistic Video for Contactless Heart rate Monitoring Using Video Amplification Methodologies
In this research, we improved the outcomes of Eulerian Video Magnification in real life scenarios. The proposed system minimizes or eliminates the motion constrained effect. The system will preprocess the video through multi staged tasks using subject targeting and stabilizing. The resulted …
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Novel Preprocessing and Normalization Methods for Analysis of GC/LC-MS Data
We introduce new methods for preprocessing and normalization of data acquired by gas/liquid chromatography coupled with mass spectrometry (GC/LC-MS). Normalization is desired prior to subsequent statistical analysis to adjust variabilities in ion intensities that are not caused by biological …
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Digital Signal Processing for segmented HPGe Detectors, Preprocessing Algorithms and Pulse Shape Analysis
… powerful digital electronics will be developed. Preprocessing algorithms, giving the gamma-ray energy and generating event triggers, were implemented on a VME module equipped with fast A/D converters and tested with different detectors and sources. Emphasis was placed on the detailed simulation …
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Single-server client preprocessing private information retrieval with tight space-time trade-off
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Revolutionizing Time Series Data Preprocessing with a Novel Cycling Layer in Self-Attention Mechanisms
… a novel method for improving time series data preprocessing by incorporating a cycling layer into self-attention mechanisms. Traditional techniques often struggle to capture the cyclical nature of time series data, impacting predictive model accuracy. By integrating a cycling layer, this thesis …
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Improving the Prediction Accuracy of Text Data and Attribute Data Mining with Data Preprocessing
… data and turning it into useful knowledge. Data preprocessing is an important step in the data mining process. The quality of the data affects the result and accuracy of the data mining results. Hence, Data preprocessing becomes one of the critical steps in a data mining process.</p> <p>In the …
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Hydraulic Data Preprocessing for Anomaly Based Intrusion Detection on SCADA Level of Water Treatment Systems
… performance of the model, hence a need for data preprocessing which makes it possible to achieve speed and accuracy on a ML process by unveiling veracity in the data ergo making it valuable. Although many ML techniques for intrusion detection have been studied, comprehensive data preprocessing is …
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Development of an Automated Coin Grading System: Integrating Image Preprocessing, Feature Extraction, and ML Modeling
… an automated coin grading system that uses image preprocessing, feature extraction, and advanced machine learning techniques to predict the grade across different coin types. Our system employs synthetic reference masks to identify "expected" regions, like the contours of reliefs, and "unexpected" …
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