Now showing items 21-40 of 5269

    • Conference Object  

      Online Approximation of Prediction Intervals Using Artificial Neural Networks 

      Hadjicharalambous, Myrianthi; Polycarpou, Marios M.; Panayiotou, Christos G. (Springer International Publishing, 2018)
      Prediction intervals offer a means of assessing the uncertainty of artificial neural networks’ point predictions. In this work, we propose a hybrid approach for constructing prediction intervals, combining the Bootstrap ...
    • Article  

      Jointly-optimized Searching and Tracking with Random Finite Sets 

      Papaioannou, Savvas; Kolios, Panayiotis; Theocharides, Theocharis; Panayiotou, Christos G.; Polycarpou, Marios (2019)
      In this paper we investigate the problem of joint searching and tracking of multiple mobile targets by a group of mobile agents. The targets appear and disappear at random times inside a surveillance region and their ...
    • Conference Object  

      Optimization Based Partitioning Selection for Improved Contaminant Detection Performance 

      Kyriacou, Alexis; Timotheou, Stelios; Reppa, Vasso; Boem, Francesca; Panayiotou, Christos; Polycarpou, Marios; Parisini, Thomas (2018)
      Indoor Air Quality monitoring is an essential ingredient of intelligent buildings. The release of various airborne contaminants into the buildings, compromises the health and safety of occupants. Therefore, early contaminant ...
    • Conference Object  

      Queue-Based Resampling for Online Class Imbalance Learning 

      Malialis, Kleanthis; Panayiotou, Christos; Polycarpou, Marios M. (Springer International Publishing, 2018)
      Online class imbalance learning constitutes a new problem and an emerging research topic that focusses on the challenges of online learning under class imbalance and concept drift. Class imbalance deals with data streams ...
    • Conference Object  

      Effective Multi-region Traffic Control and Demand Management Using an Overlay Route-Reservation Scheme 

      Menelaou, C.; Kolios, P.; Timotheou, Stelios; Panayiotou, Christos G. (2018)
      In this work, we assume that a heterogeneous urban area is partitioned into multiple homogeneous regions. The proposed approach creates an overlay graph which is used by the reservation architecture to control the traffic ...
    • Article  

      A Data-Driven Bandwidth Allocation Framework With QoS Considerations for EONs 

      Panayiotou, Tania; Manousakis, Konstantinos; Chatzis, Sotirios P.; Ellinas, Georgios (2019)
      This paper proposes a data-driven bandwidth allocation (BA) framework for periodically and dynamically reconfiguring an elastic optical network according to predictive BA (PBA) models. The proposed framework is scalable ...
    • Article  

      Information Structures for Feedback Capacity of Channels With Memory and Transmission Cost: Stochastic Optimal Control and Variational Equalities 

      Kourtellaris, Christos K.; Charalambous, Charalambos D. (2018)
      Stochastic optimal control theory and a variational equality of directed information are applied, to develop a methodology to identify the information structures of optimal channel input conditional distributions, which ...
    • Conference Object  

      Joint route guidance and demand management for multi-region traffic networks 

      Menelaou, C.; Timotheou, Stelios; Kolios, P.; Panayiotou, Christos G. (2019)
      Traffic congestion occurs as demand surpasses the available capacity of a road network, resulting to lower speeds and longer journey times
    • Conference Object  

      Estimating the Critical Density of Road Transportation Networks using Infinitesimal Perturbation Analysis of Hybrid Systems 

      Menelaou, C.; Timotheou, Stelios; Kolios, P.; Panayiotou, Christos G. (2018)
      In this paper, we adobe the Stochastic Fluid Modeling framework to model the critical density of a road network and we employ the route-reservation scheme (as proposed in [1], [2]) to control traffic for a congestion-free ...
    • Conference Object  

      Measuring tissue dispersion using the cross-correlation of half-spectrum optical coherence tomography images 

      Photiou, Christos; Bousi, Evgenia; Zouvani, Ioanna; Pitris, Costas (International Society for Optics and Photonics, 2019)
      In Optical Coherence tomography (OCT), dispersion mismatches cause degradation of the image resolution and are, thus, compensated accordingly. However, dispersion is specific to the material that is causing the effect and ...
    • Conference Object  

      Path-based joint demand management and route guidance for multi-region traffic networks 

      Menelaou, C.; Timotheou, Stelios; Kolios, P.; Panayiotou, Christos G.; Polycarpou, Marios M. (2019)
      This work investigates the joint optimization problem of demand management and route guidance to minimize the time spent of vehicles in traffic networks characterized by well-defined regional fundamental diagrams. To account ...
    • Conference Object  

      An Event-triggering Approach for Bus Tracking based on Multimodel Mobility Prediction 

      Michalopoulou, M.; Kolios, P.; Panayiotou, Christos; Ellinas, Georgios (2019)
      Tracking a fleet of buses that serve routes across a city is an essential functionality for the successful utilization of modern transportation networks. However, to date, little attention has been paid to the effectiveness ...
    • Conference Object  

      Active Fault Diagnosis via Reachable Set Separation using Interval Methods 

      Tsiakkas, Mihalis; Sopasakis, Pantelis; Boem, Francesca; Panayiotou, Christos; Polycarpou, Marios (2019)
      This paper presents an optimization-based approach for active fault isolation in linear time invariant systems subject to additive disturbances which are bounded in intervals. We model the evolution of the system states ...
    • Conference Object  

      Secure Event Logging Using a Blockchain of Heterogeneous Computing Resources 

      Koumidis, K.; Kolios, P.; Ellinas, Georgios; Panayiotou, Christos G. (2019)
      Secure logging is essential for the integrity and accountability of cyber-physical systems (CPS). To prevent modification of log files the integrity of data must be ensured. In this work, we propose a solution for secure ...
    • Article  

      Exploiting Shared-Memory to Steer Scalability of Fault Simulation Using Multicore Systems 

      Hadjitheophanous, Stavros; Neophytou, Stelios N.; Michael, Maria K. (2019)
      Current and future multicore architectures can significantly accelerate the performance of test automation procedures depending on the underlying architecture and the scalability of their algorithms. This paper proposes a ...
    • Article  

      Drones: Augmenting Our Quality of Life 

      Kyrkou, Christos; Timotheou, Stelios; Kolios, Panayiotis; Theocharides, Theocharis; Panayiotou, Christos (2019)
      Drone technology that has the potential to disrupt and augment our quality of life is swiftly evolving. Drones are rapidly growing in popularity and are used in various applications, such as agriculture, emergency response, ...
    • Conference Object  

      A Unified Framework for Reliable Multi-Drone Tasking in Emergency Response Missions 

      Terzi, Maria; Kolios, Panayiotis; Panayiotou, Christos; Theocharides, Theocharis (2019)
      In this paper a unified framework is presented for coordinated multi-drone tasking in emergency response missions. As elaborated in this work, response missions can be broken into a number of distinct tasks that can be ...
    • Conference Object  

      Enhancing storage integration in buildings with photovoltaics (PV-ESTIA project) 

      Nousdilis, Angelos I.; Kryonidis, Georgios C.; Kontis, Eleftherios O.; Papagiannis, Grigoris K.; Christoforidis, Georgios C.; Bouhouras, Aggelos S.; Georghiou, George; Afxentis, Stavros; Papageorgiou, Ioannis; Veleva, Sanja; Kacarska, Marija; Glamocanin, Vlastimir; Kisyov, Petar (2018)
      European Union's energy targets for 2030 include the transformation of the building stock to nearly zero energy buildings (NZEBs). NZEBs are characterized by reduced net-energy demand, since most of their energy needs are ...
    • Conference Object  

      Machine learning algorithms for photovoltaic system power output prediction 

      Theocharides, Spyros; Makrides, George; Georghiou, George E.; Kyprianou, Andreas (2018)
      Accurate photovoltaic (PV) production forecasting is necessary for the optimal integration of this technology into existing power systems and is important for both grid and plant operators. The purpose of this work is to ...
    • Article  

      A Decentralized, Hybrid Photovoltaic-Solid Oxide Fuel Cell System for Application to a Commercial Building 

      Arsalis, Alexandros; Georghiou, George E. (2018)
      New energy solutions are needed to decrease the currently high electricity costs from conventional electricity-only central power plants in Cyprus. A promising solution is a decentralized, hybrid photovoltaic-solid oxide ...