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According to various studies, a strong market penetration of electric mobility is expected in the next few years. On the one hand, electric vehicles can contribute to achieve climate targets, but on the other hand, they can place a heavy burden on the power grid and have serious consequences, such as component overload and voltage instabilities, if they are charged in an uncoordinated manner.
Proper grid integration of electric vehicles with a coordinated charging approach can minimize these negative impacts and brings about positive aspects, such as improving grid quality and integrating larger amounts of renewable energy.
Taking into consideration the legal framework and the different requirements of network operators, vehicle manufacturers and owners, this paper compares different network integration techniques.
It is concluded that a decentralized charging management approach, in which the vehicle owners themselves make the charging decisions, is a good compromise between the different parties and consequently the best alternative for the grid integration of electric vehicles in Ger-many.
One aspect that needs further investigation is which is the best way to motivate vehicle owners to actively participate in a flexible charging management.
In this document a reliable data streaming mechanism for a TDMA LPWAN application is developed by adapting a link layer solution for power line communication, published at the International Symposium on Power Line Communications and its Applications (ISPLC) 2015. A C++ implementation of the services link layer is provided and demonstrated
working at a packet error rate of 50%.
This work aims to generate synthetic electromyographic (EMG) signals using Generative Adversarial Network (GAN). GANs are considered as one of the most exciting and promising approaches in deep learning [6], offering the possibility to generate artificial data based on real data. GAN consists of two main parts, a discriminator that attempts to differentiate between the generated data and the original data, and a generator that tries to fool the discriminator by generating data which looks like real data, the GAN works by staging a two-player
minimax game between generator and discriminator networks. To achieve the objective of generating realistic artificial electromyographic signals, two different architectures are considered for the generator and the discriminator networks of the GAN model: Long short-term memory (LSTM), which can avoid the long-term dependency problem and remembers information over a long period of time, and convolutional neural network (CNN), which is a powerful tool at automatic feature extraction. Different combinations of CNN and LSTM including hybrid model are experimented within the GAN using the same training data-set. The results and performances of each combination are compared and reviewed. The generated artificial EMG signals can be used to
simulate real muscle activity situations to for example improve muscle signal controlled prostheses using artificial data that may include conditions that does not exist in real data. This method of artificial data generation is not limited to EMG signals, the network can also be used to generate other synthetic biomedical signals such as electroencephalogram (EEG) or electrocardiogram (ECG) that can be practically used for testing algorithms and classifiers.
The goal of this empirical study is to answer whether predictions about stock price movements can be made with the use of machine learning in the energy sector and what influence contributions from social media have on its development. To answer the research
question, the social media platforms Twitter and Reddit, in terms of the suitability of the information, were studied and evaluated. Then, the sentiments of the posts from social media were collected and used in machine learning models. The models include the Gradient Boosted Regression Tree, Multilayer Perceptron, and Long Short-Term
i Memory, which predict a subsequent day's closing stock price. The study showed that deviations from predictions of stock price movements of 1.05 % are possible and further sentiment values do not show significant positive effect on reducing the error value. The
result shows that the collected sentiments from the social media platform Twitter have no positive effect on the stock price movements within the energy industry.
Keywords: stock market, stock prediction, artificial neural networks, machine learning,
energy market, sentiment analysis
Prediction of movement onset and direction based on muscle activity during reaching movements
(2021)
Electromyography as a technology allows one to be able to measure muscle activity, which in turn can be used to detect movement direction and onset. The process for this classification problem often involves a multitude of various extracted features and classification techniques, that differ a lot across different scientific papers. This thesis analyzed different features and classifiers and tackled a center out reaching task to determine a good workflow for classifying
arm movement direction. The data was recorded with 6 sEMG electrodes
placed on the upper arm of 5 healthy participants.
The different experiments show good classification accuracy of over 96 % in a reaching task with 16 targets placed in a circle within reaching distance. The results also show that the classification accuracy did not differ a lot between features. The individual EMG channels also display high correlation, which suggests a possible reduction in necessary electrodes. Classification accuracy
before movement onset also only dropped by 2 % compared to the accuracy of the whole time window of a reaching motion. This seems especially vital to ensure proper support via prosthesis or orthesis for people with heavily impaired movement.
Ziel dieser Arbeit ist es, eine deutlich definierte Markenidentität für DigiCerts zu konzipieren. Zu diesem Zweck wird das Markensteuerrad von Esch (2018, S.98) angewandt, um in detaillierten Schritten eine nützliche Markenidentität aufzubauen. Mithilfe dieser soll anschließend folgende Fragestellung beantwortet werden: Wie kann sich DigiCerts in der Hochschullandschaft positionieren? Zur Beantwortung der zugrunde liegenden Frage, wird die Positionierungspyramide von Esch(2009, S. 163)genutzt.
Insgesamt soll mithilfe dieser Arbeit eine für DigiCerts anwendbare Identität aufgebaut werden.
Der deutsche stationäre Einzelhandel gerät immer mehr unter Druck. Seit nunmehr fast einem Jahr bestimmt die Covid-19-Pandemie weltweit das menschliche Leben. Unter den Maßnahmen zum Schutz der deutschen Bevölkerung leidet auch die deutsche Wirtschaft. Vor allem den stationären Einzelhandel trifft es in dieser Zeit sehr. Leere Städte und geschlossene Läden sind schon fast zur Normalität geworden. Doch nicht erst seit Covid-19 erlebt der deutsche stationäre Einzelhandel finanzielle Einbußen. Fortschritte auf Gebieten der modernen Technologien wie „Big Data“ und die voranschreitende Digitalisierung kommen vor allem dem Onlinehandel, der auch von der Covid-19-Pandemie profitiert, zugute. Verbunden mit den sich verändernden Bedürfnissen der deutschen Bevölkerung an den Handel, greift der Online-Handel
den stationären Einzelhandel durch den Ausbau seiner Marktanteile an. Jedoch verspricht ein modernes, aber nicht neues Technologiegebiet dem stationären Einzelhandel Besserung. Die Nutzung von Künstlicher Intelligenz könnte dem Einzelhandel dazu verhelfen, selber Gewinne
aus den anderen modernen Technologiegebieten zu erzielen, sich den veränderten Bedürfnissen des Kunden anzupassen und dem Druck des Onlinehandels stand zu halten. Die vorliegende Arbeit setzt sich mit der Bewertung des Chancenpotenzials Künstlicher Intelligenz für die Zukunft des deutschen stationären Einzelhandels auseinander. Damit wird versucht die Frage, ob der Einsatz von KI-Anwendungen dem deutschen stationären Einzelhandel dazu verhelfen wird, die oben beschriebenen Herausforderungen zu bewältigen, zu beantworten.
Um dem Leser ein fundiertes Verständnis zu vermitteln, basiert die Ermittlung des Potenzials auf einer detaillierten Erläuterung der Künstlichen Intelligenz sowie deren Fähigkeiten und Chancen, aber auch ihrer Risiken und Hürden auf dem zukünftigen Weg der Implementierung.
Auf diesem Fundament wird dann mit Hilfe einer literarischen Analyse die Bewertung vorgenommen. Bisher von der Literatur wenig berücksichtigt sind Veränderungen der Situation des deutschen stationären Einzelhandels durch die Auswirkungen der noch immer anhaltenden Covid-19-Pandemie. Die Ergebnisse der Literaturanalyse werden daher durch die Durchführung und Auswertung von Experteninterviews, als Methode der qualitativen Primärforschung,
auf Aktualität und Übereinstimmung mit Erkenntnissen aus der Praxis überprüft.
Mit Dara Kossok-Spieß, Referentin des Handelsverbands Deutschland, Niels Will und Frederic Kerber, beide im Einsatz für praxisnahe Forschungsprojekte des deutschen Forschungsinstituts für Künstliche Intelligenz, sind sowohl Vertreter beider Interessengruppen – der Anwendung sowie der Forschung – vertreten. Hierdurch konnten neue Erkenntnisse über die zukünftigen Auswirkungen der Covid-19-Pandemie auf den deutschen stationären Einzelhandelsmarkt gewonnen werden. Außerdem konnten Barrieren, die in naher Zukunft durch die Zusammenarbeit der Anwender mit der Forschung, gelöst werden müssen, damit Künstliche Intelligenz flächenübergreifend in den deutschen stationären Einzelhandel einziehen kann, ermittelt werden. Die vorliegende Arbeit richtet sich daher an alle Personen, die ein Interesse an der Bewertung des Technologiegebiets Künstlicher Intelligenz besitzen und/oder sich für die Zukunft des deutschen stationären Einzelhandels interessieren.
Within this thesis the impacts of “Made in China 2025” on business relationships between Germany and China are analysed and evaluated. The author shows up how the export business from Germany has developed since “Made in China 2025” was published officially in 2015. It is presented in which way the export business was affected until now (changes of product categories, development of export volume, growth rates…). The data are being provided by the German Bureau of National Statistics.
Based on the data analysis the strategy is being evaluated from German perspective. Furthermore the author takes a look at the development of Foreign Direct Investments (FDI) flows from China to Germany since the beginning of Made in China 2025. It is being analysed if China indeed invests more into their so-called “key-industries” since 2015. The chances that might be created by FDI as well as the threats are inspected and evaluated by experts from various institutions. In addition to that a scenario analysis from the German Frauenhofer Institut presents different scenarios that show up what might happen to Germany in case China succeeds, as well as what might happen in case the strategy is a failure.
Furthermore various trade theories are presented within this thesis, such as theories from Adam Smith, David Ricardo, Raymond Vernon or Bertil Ohlin. It is presented how useful the theories are for modern intra-industrial trade inquiries and if their assumptions are realistic.