1,720,958 research outputs found
Anwendung von Wavelet-Zerlegung und maschinellem Lernen für die sEMG-Signalbasierte Gestenerkennung
No full textIn German Language: Amputierte auf der ganzen Welt haben begrenzten Zugang zu hochwertigen intelligenten Prothesen. Die korrekte Erkennung von Gesten ist eine der schwierigsten Aufgaben im Kontext der Entwicklung von auf Oberflächen-Elektromyographie (sEMG) basierenden Prothesen. Dieses Kapitel zeigt eine vergleichende Untersuchung mehrerer auf maschinellem Lernen basierender Algorithmen zur Identifizierung von Handgesten. Der erste Schritt im Prozess ist die Datenerfassung aus dem sEMG-Gerät, gefolgt von der Merkmalsextraktion. Anschließend werden zwei robuste maschinelle Lernalgorithmen auf den extrahierten Merkmalsatz angewendet, um ihre Vorhersagegenauigkeit zu vergleichen. Die mittlere Gaußsche Support Vector Machine (SVM) funktioniert unter allen Bedingungen besser als der K-nearest neighbor. Verschiedene Parameter werden für den Leistungsvergleich verwendet, darunter F1-Score, Genauigkeit, Präzision und Kappa-Index. Die vorgeschlagene Methode zur Erkennung von Handgesten, basierend auf sEMG, wird gründlich untersucht und die Ergebnisse haben eine vielversprechende Leistung gezeigt. In jedem Fall kann ein Fehlverhalten bei der Merkmalsextraktion die Erkennungsgenauigkeit verringern. Die tiefgreifenden Lernmethoden werden verwendet, um eine hohe Präzision zu erreichen. Daher berücksichtigt das vorgeschlagene Design alle Aspekte bei der Verarbeitung des sEMG-Signals. Das System sichert eine höchste Klassifizierungsgenauigkeit von 92,2 % für den Fall des Gaußschen SVM-Algorithmus
A Dynamic KNX-Based Energy Management System Utilizing Machine Learning and Probabilistic Models for Renewable Energy Optimization
No full textThis thesis presents a comprehensive analysis and optimization of an intelligent Energy Management System (EMS) specifically developed for residential buildings, integrating real-time occupancy-driven controls and advanced machine learning (ML) predictive modeling. Initially, a baseline energy scenario was established using HOMER Pro, simulating a grid-connected hybrid renewable energy system featuring a 200 kW photovoltaic (PV) array and a 100 kW inverter for a mid-rise residential building located in Jeddah, Saudi Arabia. Comparative analysis revealed significant hourly energy savings of approximately 15.33% through the implementation of occupancy-responsive automation based on KNX control systems.
To further refine energy predictions and optimization, predictive modeling using Support Vector Regression (SVR) and alternative ML techniques was conducted utilizing the high-resolution Solace dataset. Bayesian hyperparameter optimization was systematically applied, enhancing the predictive reliability of SVR. At a moderate dataset scale (10,000 sampling points), SVR achieved robust predictive with an RMSE of 0.0781 kWh and R² of 0.9195) and practical computational efficiency. However, at a larger scale (100,000 sampling points), SVR accuracy declined notably with an RMSE of 0.0904 kWh and R² of 0.8854, highlighting an inherent performance trade-off related to dataset size and computational demand. In contrast, Random Forest maintained superior accuracy with an RMSE of 0.0702 kWh and R² of 0.9310 at large scale, albeit with significantly increased computational overhead.
The SVR predictive optimization (at moderate scale) further enhanced annual energy savings by approximately 16.48% compared to the baseline scenario, totaling approximately 61,799 kWh/year. These findings validate the clear economic, operational, and environmental benefits of incorporating predictive machine learning into intelligent occupancy-driven EMS frameworks, emphasizing the importance of strategically balancing predictive accuracy with computational resources and dataset granularity
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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