592 research outputs found

    Systems reliability issues for future aircraft

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    The reliability of adaptive controls for future aircraft are discussed. The research, formulation, and experimentation for improved aircraft performance are considered

    Expert systems for real-time monitoring and fault diagnosis

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    Methods for building real-time onboard expert systems were investigated, and the use of expert systems technology was demonstrated in improving the performance of current real-time onboard monitoring and fault diagnosis applications. The potential applications of the proposed research include an expert system environment allowing the integration of expert systems into conventional time-critical application solutions, a grammar for describing the discrete event behavior of monitoring and fault diagnosis systems, and their applications to new real-time hardware fault diagnosis and monitoring systems for aircraft

    Anomaly Detection in Cloud-Native systems

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    In recent years, microservices have gained popularity due to their benefits such as increased maintainability and scalability of the system. The microservice architectural pattern was adopted for the development of a large scale system which is commonly deployed on public and private clouds, and therefore the aim is to ensure that it always maintains an optimal level of performance. Consequently, the system is monitored by collecting different metrics including performancerelated metrics. The first part of this thesis focuses on the creation of a dataset of realistic time series with anomalies at deterministic locations. This dataset addresses the lack of labeled data for training of supervised models and the absence of publicly available data, in fact the data are not usually shared due to privacy concerns. The second part consists of an empirical study on the detection of anomalies occurring in the different services that compose the system. Specifically, the aim is to understand if it is possible to predict the anomalies in order to perform actions before system failures or performance degradation. Consequently, eight different classification-based Machine Learning algorithms were compared by collecting accuracy, training time and testing time, to figure out which technique might be most suitable for reducing system overload. The results showed that there are strong correlations between metrics and that it is possible to predict the anomalies in the system with approximately 90% of accuracy. The most important outcome is that performance-related anomalies can be detected by monitoring a limited number of metrics collected at runtime with a short training time. Future work includes the adoption of prediction-based approaches and the development of some tools for the prediction of anomalies in cloud native environments

    Practical advances in asynchronous design

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    Journal ArticleRecent practical advances in asynchronous circuit and system design have resulted in renewed interest by circuit designers. Asynchronous systems are being viewed as in increasingly viable alternative to globally synchronous system organization. This tutorial will present the current state of the art in asynchronous circuit and system design in three different areas. The first section details asynchronous control systems. The second describes a variety of approaches to asynchronous datapaths. The third section is on asynchronous and self-timed circuits applied to the design of general purpose processors

    The Role Artificial Intelligence in Modern Banking: An Exploration of AI-Driven Approaches for Enhanced Fraud Prevention, Risk Management, and Regulatory Compliance

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    Banking fraud prevention and risk management are paramount in the modern financial landscape, and the integration of Artificial Intelligence (AI) offers a promising avenue for advancements in these areas. This research delves into the multifaceted applications of AI in detecting, preventing, and managing fraudulent activities within the banking sector. Traditional fraud detection systems, predominantly rule-based, often fall short in real-time detection capabilities. In contrast, AI can swiftly analyze extensive transactional data, pinpointing anomalies and potentially fraudulent activities as they transpire. One of the standout methodologies includes the use of deep learning, particularly neural networks, which, when trained on historical fraud data, can discern intricate patterns and predict fraudulent transactions with remarkable precision.  Furthermore, the enhancement of Know Your Customer (KYC) processes is achievable through Natural Language Processing (NLP), where AI scrutinizes textual data from various sources, ensuring customer authenticity. Graph analytics offers a unique perspective by visualizing transactional relationships, potentially highlighting suspicious activities such as rapid fund transfers indicative of money laundering. Predictive analytics, transcending traditional credit scoring methods, incorporates a diverse data set, offering a more comprehensive insight into a customer's creditworthiness.  The research also underscores the importance of user-friendly interfaces like AI-powered chatbots for immediate reporting of suspicious activities and the integration of advanced biometric verifications, including facial and voice recognition. Geospatial analysis and behavioral biometrics further bolster security by analyzing transaction locations and user interaction patterns, respectively.  A significant advantage of AI lies in its adaptability. Self-learning systems ensure that as fraudulent tactics evolve, the AI mechanisms remain updated, maintaining their efficacy. This adaptability extends to phishing detection, IoT integration, and cross-channel analysis, providing a comprehensive defense against multifaceted fraudulent attempts. Moreover, AI's capability to simulate economic scenarios aids in proactive risk management, while its ability to ensure regulatory compliance automates and streamlines a traditionally cumbersome process

    Digital flight control systems

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    The design of stable feedback control laws for sampled-data systems with variable rate sampling was investigated. These types of sampled-data systems arise naturally in digital flight control systems which use digital actuators where it is desirable to decrease the number of control computer output commands in order to save wear and tear of the associated equipment. The design of aircraft control systems which are optimally tolerant of sensor and actuator failures was also studied. Detection of the failed sensor or actuator must be resolved and if the estimate of the state is used in the control law, then it is also desirable to have an estimator which will give the optimal state estimate even under the failed conditions

    Machine Learning

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    Machine Learning can be defined in various ways related to a scientific domain concerned with the design and development of theoretical and implementation tools that allow building systems with some Human Like intelligent behavior. Machine learning addresses more specifically the ability to improve automatically through experience

    Fourth Conference on Artificial Intelligence for Space Applications

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    Proceedings of a conference held in Huntsville, Alabama, on November 15-16, 1988. The Fourth Conference on Artificial Intelligence for Space Applications brings together diverse technical and scientific work in order to help those who employ AI methods in space applications to identify common goals and to address issues of general interest in the AI community. Topics include the following: space applications of expert systems in fault diagnostics, in telemetry monitoring and data collection, in design and systems integration; and in planning and scheduling; knowledge representation, capture, verification, and management; robotics and vision; adaptive learning; and automatic programming
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