The success of the reconfiguration of existing manufacturingsystems, so called brownfield systems, heavily relies on the knowledge about the system. Reconfiguration can be planned, supported and simplified with the D...
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ISBN:
(纸本)9781728129891
The success of the reconfiguration of existing manufacturingsystems, so called brownfield systems, heavily relies on the knowledge about the system. Reconfiguration can be planned, supported and simplified with the Digital Twin of the system providing this knowledge. However, digital models as the basis of a Digital Twin are usually missing for these plants. This article presents a data-driven approach to gain knowledge about a brownfield system to create the digital models of a Digital Twin and their relations. Finally, a proof of concept shows that process data and position data as data sources deliver the relations between the models of the Digital Twin.
Mobile Edge Computing (MEC) and Digital Twin (DT) technologies are crucial to meet the quality of service (QoS) of emerging applications. MEC sinks the processing power of the cloud to the edge and responds to users...
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data fusion is the process of integrating data from multiple sources to produce more accurate and reliable information. It is often the case that data are subject to latent confounding and measurement error in real-wo...
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ISBN:
(数字)9798350368031
ISBN:
(纸本)9798350368048
data fusion is the process of integrating data from multiple sources to produce more accurate and reliable information. It is often the case that data are subject to latent confounding and measurement error in real-world scenarios. In this paper, we evaluate fusion strategies based on different levels of contained causal knowledge to solve quality prediction under varied conditions of latent confounding and measurement error. We show that the machine learning-based fusion strategy achieves the best prediction quality when data are independent and identically distributed (i.i.d.). However, in the presence of latent confounding, the causality-based fusion strategy makes prediction models more robust against severe distribution shifts. Moreover, the out-of-distribution (OOD) generalizability of prediction models is also affected by measurement error in the data. If causal knowledge needs to be inferred from data by applying causal discovery methods, we demonstrate that measurement error can adversely impair causal discovery. We advocate that caution needs to be exercised when using standard causal discovery methods if the circumstances under which the data were generated are unknown.
Recommendation systems are crucial due to their high relevance in terms of interpretability and performance. A Social Recommendation system explores how social relations influence user choices and how users select ite...
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ISBN:
(数字)9798331529246
ISBN:
(纸本)9798331529253
Recommendation systems are crucial due to their high relevance in terms of interpretability and performance. A Social Recommendation system explores how social relations influence user choices and how users select items. In this system, user-embeddings are learned from knowledge graphs to enhance the recommendations. The social recommendation system can be categorized into three main areas: user recommendation, movie recommendation, and explainable recommendation. User recommendation focusses on providing users with personalized services, movie recommendation enhances the movie-watching experience, and explainable recommendation aims to provide the reasoning behind the suggested items. data sparsity and the cold start problem are significant challenges faced by RS. The Social RS model addresses these issues by leveraging both user-item interactions and user-user social relationships, thereby improving the overall quality of social network-based recommendations. Methods such as Light Graph Convolutional Network (LGCN), Hyperbolic Recommender (HSR), and knowledge Enhanced Graph Neural Networks (KEGNN) have been proposed to enhance social recommendation performance. Evaluation metrics such as recall @N, precision @N are commonly used to assess and estimate the effectiveness of recommendation systems.
In semiconductor manufacturing, it is required to detect anomalies which cause expensive defects. In recent years, Generative Adversarial Networks (GANs) have played a big role in anomaly detection. This study aims to...
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In semiconductor manufacturing, it is required to detect anomalies which cause expensive defects. In recent years, Generative Adversarial Networks (GANs) have played a big role in anomaly detection. This study aims to detect anomalies by analyzing sensor data using a GAN when multivariate time series of sensor data are given. Our GAN could detect anomalies which cannot be detected visually. Experimental results indicated that an attention mechanism could tell us important sensors in detecting anomalies. (C) 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://***/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of KES international.
The accuracy of selectivity estimation is of vital importance to create good query plans in database management systems. We propose MOSE, a learning-based MOnotonic Selectivity Estimator, to provide accurate, reliable...
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ISBN:
(数字)9781665408837
ISBN:
(纸本)9781665408837
The accuracy of selectivity estimation is of vital importance to create good query plans in database management systems. We propose MOSE, a learning-based MOnotonic Selectivity Estimator, to provide accurate, reliable, and efficient selectivity estimation for query optimization.
As component of the industry 4.0 project, a novel concept of Cyber-Physical systems (CPS), fog computing, big data analytics, cloud manufacturing, the Internet of Things (IoT), and other technologies have been brought...
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As component of the industry 4.0 project, a novel concept of Cyber-Physical systems (CPS), fog computing, big data analytics, cloud manufacturing, the Internet of Things (IoT), and other technologies have been brought to the manufacturing sector. Some of the projected benefits and possibilities that these innovations might provide include self-prediction, self-maintenance, self-comparison, self-configuration, and self-awareness. In these concepts, the centralised corporate system and third-party trust operations are still in use. However, contemporary manufacturing has a slew of problems, including data security and reliability, adaptability, security, trust, and privacy. This paper provides an analysis of the Blockchain Technology (BT), reviews the application of blockchain in Artificial Intelligence (AI), proposes a model for blockchain-enabled CPS and discusses the potential challenges that face the implementation of blockchain in manufacturingsystems.
Managing dynamic datasets intended to serve as training data for a Machine Learning (ML) model often emerges as very challenging, especially when data is often altered iteratively and already existing ML models should...
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ISBN:
(纸本)9781450394673
Managing dynamic datasets intended to serve as training data for a Machine Learning (ML) model often emerges as very challenging, especially when data is often altered iteratively and already existing ML models should pertain to the data. For example, this applies when new data versions arise from either a generated or aggregated extension of an existing dataset a model has already been trained on. In this work, it is investigated on how a model-based approach for these training data concerns can be provided as well as how the complete process, including the resulting training and retraining process of the ML model, can therein be integrated. Hence, model-based concepts and the implementation are devised to cope with the complexity of iterative data management as an enabler for the integration of continuous retraining routines. With Deep Learning techniques becoming technically feasible and massively being developed further over the last decade, MLOps, aiming to establish DevOps tailored to ML projects, gained crucial relevance. Unfortunately, data-management concepts for iteratively growing datasets with retraining capabilities embedded in a model-driven ML development methodology are unexplored to the best of our knowledge. To fill in this gap, this contribution provides such agile data management concepts and integrates them and continuous retraining into the model-driven ML Framework MontiAnna [18]. The new functionality is evaluated in the context of a research project where ML is exploited for the optimal design of lattice structures for crash applications.
Sunlight and rain are mostly a blessing but sometimes, they can be a curse. There are objects that are intentionally left out in the Sun but there are some that should not be exposed to it, that goes the same way with...
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Analog and mixed-signal (A/MS) IC design is still a largely manual process. It lags far behind its digital counterpart were synthesis methods automate many key design steps. This advantage in digital roots from the po...
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