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International Joint Conference on Neural Networks

作者： Jia Wu Zhihua Cai Shirui Pan Xingquan Zhu Chengqi Zhang Centre for Quantum Computation & Intelligent Systems University of Technology Sydney Australia Department of Computer Science China University of Geosciences Wuhan China Dept. of Computer and Electrical Engineering & Computer Science Florida Atlantic University USA

A Bayesian Network (BN) is a graphical model which can be used to represent conditional dependency between random variables, such as diseases and symptoms. A Bayesian Network Classifier (BNC) uses BN to characterize the relation-ships between attributes and the class labels, where a simplified approach is to employ a conditional independence assumption between attributes and the corresponding class labels, i.e., the Naive Bayes (NB) classification model. One major approach to mitigate NB's primary weakness (the conditional independence assumption) is the attribute weighting, and this type of approach has been proved to be effective for NB with simple structure. However, for weighted BNCs involving complex structures, in which attribute weighting is embedded into the model, there is no existing study on whether the weighting will work for complex BNCs and how effective it will impact on the learning of a given task. In this paper, we first survey several complex structure models for BNCs, and then carry out experimental studies to investigate the effectiveness of the attribute weighting strategies for complex BNCs, with a focus on Hidden Naive Bayes (HNB) and Averaged One-Dependence Estimation (AODE). Our studies use classification accuracy (ACC), area under the ROC curve ranking (AUC), and conditional log likelihood (CLL), as the performance metrics. Experiments and comparisons on 36 benchmark data sets demonstrate that attribute weighting technologies just slightly outperforms unweighted complex BNCs with respect to the ACC and AUC, but significant improvement can be observed using CLL.

关键词： Niobium Bayes methods Training Mutual information Estimation Educational institutions Annealing

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Towards A Secured SCADA Architecture: A DNP3 Test Case

Towards A Secured SCADA Architecture: A DNP3 Test Case

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IEEE Southeastcon

作者： Ahmed S. Soliman Rocio Devine Diego Landi S M Sajjad Hossain Rafin M. H. Cintuglu Osama A. Mohammed Dept. of Electrical and Computer Engineering Energy Systems Research Laboratory Florida International University Miami Florida USA ECE Department Energy System Research Laboratory Florida International University Miami FL USA Dept. of Electrical and Computer Engineering Florida International University Miami Florida USA

The foundation of a country's critical infrastructures (CI), which provide crucial services, is its security, healthcare, and economic systems. By lowering CI's operational costs and associated expenses and enhancing its effectiveness and safety, appropriately functional CI infrastructure plays an essential role in the prosperity of the nations. To do so, businesses that manage CIs frequently combine the Internet of Things (IoT) with Cyber-Physical systems (CPS), such as SCADA systems. SCADA systems were not initially built with web security in mind, exposing CIs open to security risks. National security issues can arise when these technologies are connected to power plants and water treatment facilities. This study aims to demonstrate how security features can be implemented in DNP3-based SCADA infrastructures. By creating a functional configuration and consensus amongst the communicating devices, the DNP3 protocol will support digital signatures. The team proposed a SCADA architecture to accomplish this, making it possible for these systems more secure manner.

关键词： Protocols Industrial control SCADA systems Medical services Safety Security Internet of Things

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Lessons Learnt from Designing a Smart Clothing Telehealth System for Hospital Use 32

Lessons Learnt from Designing a Smart Clothing Telehealth Sy...

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32nd Australian computer-Human Interaction Conference, OzCHI 2020

作者： Aggarwal, Deepti Hoang, Thuong Ploderer, Bernd Vetere, Frank Khot, Rohit Ashok Bradford, Mark Hafp Research Lab Rmit University Australia School of Information Technology Deakin University Australia School of Electrical Engineering and Computer Science Queensland University of Technology Australia Interaction Design Lab School of Computing and Information Systems The University of Melbourne Australia Dept. of Anaesthesia and Pain Management Royal Children's Hospital Australia

ISBN: (纸本)9781450389754

In this paper, we describe the design journey of a smart clothing system, SoPhy from the research laboratory to finally being evaluated in the hospital setting. SoPhy is a smart socks-based system, designed to make physiotherapy video consultations effective for assessing lower limb issues. SoPhy is the result of a 3-year journey of development, study and refinement of a research prototype done in collaboration with a physiotherapist. Drawing on this journey, we present seven lessons that emphasize on the importance of fostering strong collaborations with clinicians to move beyond laboratory studies and reach the target health setting. We provide contextual narratives on how we designed a comfortable smart clothing for patients;how we created an intuitive mapping of sensor data for clinicians;how we integrated hospital practice in the system design, and how we managed the ethics clearance for the field evaluation. We hope that these lessons are useful for HCI and health researchers who aim to innovate the field of health but feel restricted with the little knowledge of design and electronics. © 2020 ACM.

关键词： Research laboratories

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An Ontology-based contextual pre-filtering technique for Recommender systems

An Ontology-based contextual pre-filtering technique for Rec...

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Federated Conference on computer Science and Information systems (FedCSIS)

作者： Aleksandra Karpus Iacopo Vagliano Krzysztof Goczyła Maurizio Morisio Faculty of Electronics Telecommunication and Informatics Gdansk University of Technology Gdańsk-Wrzeszcz Poland Dept. Control and Computer Engineering Politecnico di Torino Turin Italy

Context-aware Recommender systems aim to provide users with the most adequate recommendations for their current situation. However, an exact context obtained from a user could be too specific and may not have enough data for accurate rating prediction. This is known as the data sparsity problem. Moreover, often user preference representation depends on the domain or the specific recommendation approach used. Therefore, a big effort is required to change the method used. In this paper we present a new approach for contextual pre-filtering (i.e. using the current context to select a relevant subset of data). Our approach can be used with existing recommendation algorithms. It is based on two ontologies: Recommender System Context ontology, which represents the context, and Contextual Ontological User Profile ontology, which represents user preferences. We evaluated our approach through an offline study which showed that when used with well-known recommendation algorithms it can significantly improve the accuracy of prediction.

关键词： Context Ontologies Context modeling Vocabulary Recommender systems Motion pictures Prediction algorithms

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Main principles and limitations of current order tracking methods

Main principles and limitations of current order tracking me...

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23rd Conference and Exposition on Structural Dynamics 2005, IMAC-XXIII

作者： Brandt, Anders Lagö, Thomas Ahlin, Kjell Tuma, Jiri Axiom EduTech AB P.O. Box 2822 SE-187 28 Täby Sweden Axiom EduTech Inc. 70 Himalaya Ct Alpine UT 84004 United States Dept. of Mechanical Engineering Blekinge Institute of Technology SE-371 79 Karlskrona Sweden Dept. of Control Systems and Instrumentation ul. 17. listopadu c. 15 7. patro 708 33 Ostrava-Poruba Czech Republic

ISBN: (纸本)0912053895

Order tracking is a widely used tool for analysis of vibrations generated in engines, drive lines, and other components, since many vibration components are related to RPM. In recent years off-line order tracking has become suitable due to enhanced computer speeds. Many methods, some patented, for on-line as well as off-line order tracking have been presented over the years. In this paper we review some basic ideas behind current methods and compare their main advantages and limitations. Some basic time-frequency concepts and time window effects are reviewed. Questions on suitable tachometers and their number of pulses per revolution are also addressed. The possibility of processing RPM dependent data without tachometers is also discussed.

关键词： Data handling

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Application of a wireless sensor network technology based on GPS for structural health monitoring

Application of a wireless sensor network technology based on...

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IEEE International Workshops on Enabling Technologies: Infrastructure for Collaborative Enterprises

作者： Michela Basili Berta Buttarazzi Kenji Oguni Dept. of Structural and Geotechnical Engineering Sapienza University of Rome Department of Computer Science Systems and Production Tor Vergata University of Rome System Design Engineering Keio University School of Science for Open and Environmental Systems Keio University

ISBN: (纸本)9781479904051

The objective of the paper is to present some results of experiments for structural health monitoring by utilizing a wireless sensor network technology based on GPS. Sensor nodes equipped with GPS are installed on the top of the roof of a building and allow to detect the position of this sensor nodes during several instants of time. This information is collected through wireless communication. At first, the description of the system is presented. Then, an application of the wireless sensor network technology based on GPS to one building is discussed.

关键词： Wireless sensor network Structural health monitoring

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A multiple ant colony system with different communication strategies

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WSEAS Transactions on Information Science and Applications 2005年第6期2卷 663-670页

作者： Ellabib, Issmail Basir, Otman Calamai, Paul Dept. of Systems Design Engineering University of Waterloo Waterloo Ont. N2L 3G1 Canada Dept. of Electric and Computer Engineering University of Waterloo Waterloo Ont. N2L 3G1 Canada

In this paper we develop communication strategies with the concept of parallel processing to enhance performance of the Ant Colony System algorithm. In these strategies we choose one particular scheme of adapting the amount of pheromone based on the quality of solutions found by several colonies and the state of convergence. We investigate and compare the search behavior and the performance of these strategies with other existing strategies using the Traveling Salesman Problem (TSP). The results demonstrate the potential of applying the multiple version over the sequential version of the Ant Colony System with some variations in the performance of the multiple version employing different strategies. The study indicates that the weighting scheme that is incorporated in the proposed strategies improves performance, particularly in strategies that share information among all colonies.

关键词： Parallel processing systems

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Practical relative degree in SMC systems: Frequency domain approach

Practical relative degree in SMC systems: Frequency domain a...

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International Workshop on Variable Structure systems, VSS

作者： Antonio Rosales Leonid Fridman Yuri Shtessel Deparment of Control and Robotics National Autonomus University of Mexico Mexico City Mexico Electrical and Computer Engineering Dept. The University of Alabama in Huntsville Huntsville AL USA

A variety of output regulation problems can be addressed via sliding mode control when system's relative degree is known. The difficulties in the implementation of sliding mode controllers emerge when the relative degree is unknown. On the other hand, practical systems controlled by sliding mode algorithms always work under tolerance limits, which are frequently known. This behavior is called real sliding motion. In this work, the concept of practical relative degree in single-input-single-output systems controlled by sliding mode controllers is revisited from the view point of frequency analysis. Practical relative degree is understood as the smallest order of the sliding mode controller that satisfies the tolerance limits. Also, the notion of practical relative degree is analyzed in terms of the definitions of performance margins. The usefulness of the proposed concept is the way to design sliding mode controllers for systems that can be considered a black-box. The practical relative degree is studied and illustrated via examples and simulations.

关键词： Limit-cycles Equations Mathematical model Frequency-domain analysis Sliding mode control Closed loop systems

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AN ASYMPTOTIC APPROACH FOR THE CALCULATION of ELECTROMAGNETIC FIELD COUPLING TO LONG TERMINATED LINES

AN ASYMPTOTIC APPROACH FOR THE CALCULATION of ELECTROMAGNETI...

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2024 ROMA International Symposium on Electromagnetic Compatibility, EMC 1998

作者： Tkachenko, S. Rachidi, F. Ianoz, M. Martynov, L. Radio Research and Development Institute Moscow103064 Russia University of Toronto Dept. of Electrical and Computer Engineering Toronto Canada Montena EMC RossensCH-1728 Switzerland Swiss Federal Institute of Technology Power Systems Laboratory LausanneCH-1015 Switzerland Russian State Committee on Telecommunications and Informatic Moscow103375 Russia

ISBN: (纸本)9798331500016

In this paper, we present and validate an analytical expression for the induced current on a long terminated line, under the thin wire approximation. The coefficients of the analytical expression are determined using a procedure based on the knowledge of the exact solutions for a short line. The length of the short line is independent of the original line length, and therefore the method is very efficient when considering the electromagnetic coupling to very long lines. © 1998 University of Rome a La Sapienza.

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Optical Memory Elements Based on Hetero-nipi Superlattice Asymmetric Cavity Spatial Light Modulators

Optical Memory Elements Based on Hetero-nipi Superlattice As...

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Spatial Light Modulators and Applications, SLM 1993

作者： Hibbs-Brenner, M.K. Mukherjee, S.D. Lehman, J. Ruden, P.P. Liu, J.J. Sawchuk, A.A. Hsu, W.-F. Honeywell Systems and Research Center 10701 Lyndale Avenue South BloomingtonMN55420 United States Dept. of Electrical Engineering and Computer Science University of Minnesota MinneapolisMN55455 United States Signal and Image Processing Institute University of Southern California Los AngelesCA90089-2564 United States

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