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Littérature scientifique sur le sujet « Hybrid communicating systems »

Auteur : Grafiati

Publié le 26 avril 2025

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Articles de revues sur le sujet "Hybrid communicating systems"

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Xu, Xiong, Jean-Pierre Talpin, Shuling Wang, Hao Wu, Bohua Zhan, Xinxin Liu et Naijun Zhan. « HpC : A Calculus for Hybrid and Mobile Systems ». Proceedings of the ACM on Programming Languages 9, OOPSLA1 (9 avril 2025) : 1158–83. https://doi.org/10.1145/3720478.

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Networked cybernetic and physical systems of the Internet of Things (IoT) immerse civilian and industrial infrastructures into an interconnected and dynamic web of hybrid and mobile devices. The key feature of such systems is the hybrid and tight coupling of mobile and pervasive discrete communications in a continuously evolving environment (discrete computations with predominant continuous dynamics). In the aim of ensuring the correctness and reliability of such heterogeneous infrastructures, we introduce the hybrid π-calculus (HpC), to formally capture both mobility, pervasiveness and hybridisation in infrastructures where the network topology and its communicating entities evolve continuously in the physical world. The π-calculus proposed by Robin Milner et al. is a process calculus that can model mobile communications and computations in a very elegant manner. The HpC we propose is a conservative extension of the classical π-calculus, i.e., the extension is “minimal”, and yet describes mobility, time and physics of systems, while allowing to lift all theoretical results (e.g. bisimulation) to the context of that extension. We showcase the HpC by considering a realistic handover protocol among mobile devices.

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MAN, K. L., M. A. RENIERS et P. J. L. CUIJPERS. « CASE STUDIES IN THE HYBRID PROCESS ALGEBRA HyPA ». International Journal of Software Engineering and Knowledge Engineering 15, n^o 02 (avril 2005) : 299–305. http://dx.doi.org/10.1142/s0218194005002385.

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HyPA is an algebraic theory based on the classical process algebra Algebra of Communicating Processes (ACP) for the specification and analysis of hybrid systems. We have the idea that HyPA is also well suited for addressing various aspects of digital embedded systems including hardware, software and concurrency, as well as mixed-signal designs. To show that HyPA is useful for the specification and analysis of hybrid systems and that our idea is correct, we illustrate the use of HyPA with some case studies: a point-to-point communication , a thermostat, a positive-edge-triggered D flip flop, and a small part of a mixed-signal fuzzy controller.

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DONG, JIN SONG, PING HAO et BRENDAN MAHONY. « FORMAL DESIGNS FOR EMBEDDED AND HYBRID SYSTEMS ». International Journal of Software Engineering and Knowledge Engineering 15, n^o 02 (avril 2005) : 373–78. http://dx.doi.org/10.1142/s0218194005002117.

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The design of embedded and hybrid systems requires powerful mechanisms for modeling data, state, concurrency and real-time behaviour. The {first} part of this paper illustrates a powerful design notation Timed Communicating Object Z (TCOZ) that has both channel based and sensor/actuator based interfaces. We believe that TCOZ is well suited for presenting more complete and coherent design models for complex embedded and hybrid systems. However, the challenge is how to analyze and check these models with tools support. One effective approach is to project (transform) the design models into multiple domains, then to use existing specialized tools in those domains to perform the checking and analyzing tasks. The second part of this paper demonstrates one particular projection from TCOZ designs to Timed Automata (TA) models so that TA model checkers can be used to check time related properties.

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Sharykin, Raman E., et Alexander N. Kourbatski. « A model of distributed objectbased stochastic hybrid systems ». Journal of the Belarusian State University. Mathematics and Informatics, n^o 2 (1 août 2019) : 52–61. http://dx.doi.org/10.33581/2520-6508-2019-2-52-61.

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This article offers a mathematical model for distributed objectoriented stochastic hybrid systems (DOBSHS). DOBSHS are composite objects communicating with other objects through the exchange of messages through an asynchronous medium such as a network. An important component of the model is the probabilistic nature of the DOBSHS, in which the state of the system is described by stochastic differential equations with instantaneous probabilistic state changes when certain conditions are met. Also probabilistic is the nature of the messaging environment, in which the model of message delivery time is a random variable. Such problems are often encountered in practice in various areas and issues of formal modeling and verification of their properties are very important. The article presents a mathematical model of DOBSHS and proved that it has a Markov property.

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Степаненко, Сергей, Sergey Stepanenko, Василий Южаков et Vasiliy Yuzhakov. « Exascale supercomputers. Architectural outlines ». Program systems : theory and applications 4, n^o 4 (15 novembre 2013) : 61–90. http://dx.doi.org/10.12737/2418.

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Architectural aspects of exascale supercomputers are explored. Param-eters of the computing environment and interconnect are evaluated. It is shown that reaching exascale performances requires hybrid systems. Processor elements of such systems comprise CPU cores and arithmetic accelerators, implementing the MIMD and SIMD computing disciplines, respectively. Efficient exascale hybrid systems require fundamentally new applications and architectural efficiency scaling solutions, including: 1) process-aware structural reconfiguring of hybrid processor elements by varying the number of MIMD cores and SIMD cores communicating with them to attain as high performance and efficiency as possible under given conditions; 2) application of conflict-free sets of sources and receivers and/or decomposi-tion of the computation to subprocesses and their allocation to environment elements in accordance with their features and communication topology to minimize communication time; 3) application of topological redundancy methods to preserve the topology and overall performance achieved by the above communication time minimiza-tion solutions in case of element failure thus maintaining the efficiency reached by the above reconfiguring and communication minimization solu-tions, i.e. to provide fault-tolerant efficiency scaling. Application of these solutions is illustrated by running molecular dynamics tests and the NPB LU benchmark. The resulting architecture displays dynamic adaptability to program features, which in turn ensures the efficiency of using exascale supercomputers.

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Gerald Chukwudi Eze et Mamilus Aginwa Ahaneku. « Sub-System Architecture for millimeter-wave massive MIMO systems ». World Journal of Advanced Research and Reviews 22, n^o 2 (30 mai 2024) : 306–25. http://dx.doi.org/10.30574/wjarr.2024.22.2.1352.

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In this paper, we study the hybrid beamforming design for millimeter-wave (mmWave) massive multiple-input multiple-output (mMIMO) systems. The designing of hybrid beamforming for orthogonal frequency-division multiplexing (OFDM) systems is tasking since its analog beamforming is shared among all subcarriers. We adopt a two-step technique for designing the analog and digital beamforming separately in order to maximize the average achievable energy and spectral efficiency of frequency-selective mmWave mMIMO-OFDM systems. Firstly, the analog beamforming design is based on the viewpoint of sub-systems (SS) and the goal is to optimize the array gain and radio frequency chains. Secondly, the digital beamforming design is carried out by using the regularized channel diagonalization (RCD) and block diagonalization (BD) solutions. On the other hand, the BD solution is modified for single-user. Thus, we propose the use of SS-RCD for multi-user and SS-BD for single-user hybrid beamforming designs. The solutions provide interference suppression but differ in low-SNR performance when communicating to many mobile users via data streams. Simulation results present that our hybrid beamforming design outperforms several other designs.

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Al Asmari, Abdullah Faiz, Tariq Alqubaysi, Fayez Alanazi, Ahmed Almutairi et Ammar Armghan. « Cooperative longevity of interaction model for addressing paused handoff problem in smart city intelligent transportation systems ». PLOS ONE 20, n^o 3 (17 mars 2025) : e0318997. https://doi.org/10.1371/journal.pone.0318997.

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Smart cities use Intelligent Transportation Systems (ITS) to manage traffic by continuously communicating with roadside infrastructure and nearby vehicles. Paused handoff interrupts grounded congestion, signal supervision, and path-shifting knowledge. Paused handoffs occur when cars wait to interact owing to volatile neighbours or heavily crowded roadside units. In congested metropolitan areas, ITS vehicle communication interruptions are a significant issue. This research addresses this issue. Hence, the research introduces the Cooperative Longevity of Interaction Model (CLoIM) to enhance communication reliability by minimizing the impact of paused handoff. The model employs a hybrid trained herd optimization algorithm to improve the longevity for interaction between vehicles and roadside units, minimizing handoff interruptions. The approach dynamically adjusts search strategies to prioritize high longevity interactions, improving communication stability. Results show that CLoIM increases longevity by 10.81% and reduces the paused handoff lag by 9.17%, effectively addressing the challenges of vehicle density and mobility in ITS scenarios.

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Chandnani, Manali, Mukesh Kumar Khandelwal et Meeta Sharma. « A Survey on Synchronization Approach in MAC Layer Protocols ». International Journal of Business Data Communications and Networking 13, n^o 1 (janvier 2017) : 9–27. http://dx.doi.org/10.4018/ijbdcn.2017010102.

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The Open Systems Interconnection (OSI) model describes the layered approach for communication between two networked systems. The Data link layer of OSI model consists of a sub layer known as MAC layer for achieving coordination among the communicating nodes to access the shared channel. This channel is shared between multiple nodes in a communication network and the packets transmitted at same time by different nodes collide with each other. This situation leads to loss of data and bandwidth gets wasted. To avoid this situation, MAC layer supports various protocols: TDMA, ALOHA, CSMA/CD, CSMA/CA and many hybrid techniques which employ their own criteria of synchronization for minimizing the collisions. In this paper the authors discuss about the MAC layer and the multiple access protocols which it supports for achieving synchronization among the nodes in the channel.

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Gudiño-Mendoza, Berenice, Ernesto López-Mellado et Enrique Aguayo-Lara. « A scheme for the simulation of networked agent systems modeled by timed hybrid Petri nets ». SIMULATION 94, n^o 10 (21 novembre 2017) : 887–909. http://dx.doi.org/10.1177/0037549717737861.

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A novel scheme for simulating networked agent systems is presented. In this approach, the system is composed of identical communicating agents, which have multi-role capabilities in such a manner that they can perform diverse tasks, according to a given execution context. The agent’s behavior is modeled using a timed hybrid Petri net ( THPN) whose evolution, valid for all the agents, is computed off-line using Matlab. The agents are interconnected and simulated in a Java platform using the JADE middle-ware.

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Nushi, Besmira, Ece Kamar et Eric Horvitz. « Towards Accountable AI : Hybrid Human-Machine Analyses for Characterizing System Failure ». Proceedings of the AAAI Conference on Human Computation and Crowdsourcing 6 (15 juin 2018) : 126–35. http://dx.doi.org/10.1609/hcomp.v6i1.13337.

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As machine learning systems move from computer-science laboratories into the open world, their accountability becomes a high priority problem. Accountability requires deep understanding of system behavior and its failures. Current evaluation methods such as single-score error metrics and confusion matrices provide aggregate views of system performance that hide important shortcomings. Understanding details about failures is important for identifying pathways for refinement, communicating the reliability of systems in different settings, and for specifying appropriate human oversight and engagement. Characterization of failures and shortcomings is particularly complex for systems composed of multiple machine learned components. For such systems, existing evaluation methods have limited expressiveness in describing and explaining the relationship among input content, the internal states of system components, and final output quality. We present Pandora, a set of hybrid human-machine methods and tools for describing and explaining system failures. Pandora leverages both human and system-generated observations to summarize conditions of system malfunction with respect to the input content and system architecture. We share results of a case study with a machine learning pipeline for image captioning that show how detailed performance views can be beneficial for analysis and debugging.

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Thèses sur le sujet "Hybrid communicating systems"

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West, Lamar. « Analysis and simulation of reverse path laser clipping in subcarrier multiplexed hybrid fiber coax networks ». Diss., Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/13301.

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Pietras, Christopher R. « Hybrid power system for remote communications stations ». Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA274963.

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Li, Tianshi. « A hybrid frequency modulated CDMA communication system ». Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11182008-063107/.

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Sahli, Nabil. « Contribution au problème de la sécurité sémantique des systèmes : approche basée sur l'ingénierie dirigée par les modèles ». Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0699.

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Les infrastructures industrielles critiques seront dotées de plusieurs équipements embarqués intelligents. Elles exploitent des systèmes complexes, embarqués, intelligents et sémantiques pour leurs fonctionnements, en local et à distance, dans un contexte de développement, de villes intelligentes et du web des objets. Elles emploient, de plus en plus de systèmes «contrôle/commande», pour la surveillance des plateformes industrielles critiques, en temps réel. Les infrastructures critiques seront de plus en plus communicantes dans le cadre des échanges des alarmes et la mise en place de marchés euro-méditerranéens de l’électricité et davantage plus vulnérables. La cybernétique des plateformes critiques se développe, de jour en jour, essentiellement avec l’usage de systèmes complexes embarqués intelligents sémantiques, des services web, des ontologies,..etc. Ils sont tous embarqués sur les instruments intelligents, composant les systèmes sémantiques. Des réseaux de télécommunication intelligents, filaire et sans fil, dit hybrides, se développent. Ils représentent un grand challenge, pour la sécurité des systèmes communicants futurs. Dans un contexte de développement du web, des objets et des villes intelligentes, nos travaux de recherche visent à renforcer les bases de la sécurité et de la cybernétique sémantique, pour les systèmes communicants. Dans notre solution globale, en matière de sécurité sémantique, des infrastructures critiques, nous avons proposé plusieurs sous-solutions, tels que des méta-modèles et des modèles, ainsi qu’une stratégie de sécurité de bout en bout, avec un fonctionnement sur un réseau Cloud global, hybride et sécurisé
Critical, modern, current, and even future industrial infrastructures will be equipped with several intelligent embedded equipment. They exploit complex, embedded, intelligent and semantic systems for their operations, locally and remotely, in a context of development, smart cities and the web of things. They are using more and more SCADA and DCS control systems to monitor critical industrial platforms in real time. Critical infrastructures will be more and more communicating in the framework of the exchanges of allarmes and the establishment of Euro-Mediterranean markets of the életcricité and also more and more vulnerable, to classic and even semantic attacks, to viruses, to Trojan horses. The cybernetics of critical platforms is growing, day by day, mainly with the use of complex embedded intelligent semantic systems, web services, ontologies, and format files (XML, OWL, RDF, etc.). They are all embedded in intelligent instruments, making up semantic SCADA systems. Intelligent telecommunication networks, wired and wireless, called hybrids, are developing. They represent a great challenge for the security of future communicating systems. In a context of development of the web of things and smart cities, our research aims to strengthen the bases of security and semantic cybernetics, for communicating systems. In our global solution for semantic security, critical infrastructures, we have proposed several sub-solutions, such as metamodels and models, as well as an end-to-end security strategy, with operation on a global cloud network, hybrid and secure

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Mundi, Anuj V. « PLC-WiFi hybrid broadband Internet deployment and security / ». [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0006964.

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Van, der Horst Timothy W. « Thor : the hybrid online repository / ». Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd696.pdf.

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Ngo^, Hoa`ng Anh. « Hybrid automatic-repeat-reQuest systems for cooperative wireless communications ». Thesis, University of Southampton, 2012. https://eprints.soton.ac.uk/210915/.

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As a benefit of achieving a diversity gain and/or a multiplexing gain, MIMO techniques are capable of significantly increasing the achievable throughput and/or the network coverage without additional bandwidth or transmit power. For the sake of striking an attractive trade-off between the attainable diversity gain and/or multiplexing gain, in this thesis the novel Space-Time-Frequency Shift Keying (STFSK) concept is proposed for the family of MIMO systems. More specifically, in order to generate space-time-frequency domain codewords, the STFSK encoding schemes activate one out of Q dispersion matrices, and the associated address bits are then combined with a classic time-domain and frequency-domain modulation scheme. The resultant arrangements impose no inter-symbol interference and are capable of eliminating the inter-antenna interference, hence offering a range of benefits over other classic MIMO arrangements. Additionally, a soft-output STFSK demodulator is designed for iterative detection and the complexity of both the hard- as well as soft-decision demodulators is quantified. Furthermore, the STFSK performance is studied in both the single-user and the multipleuser multi-cell environment in order to investigate the effects of these techniques on the performance of the holistically optimized systems. Furthermore, we studied the H-ARQ systems advocated in the context of cooperation-aided wireless networks, where the MIMO elements are constituted by the individual elements of separate network nodes. Both perfect and imperfect coherent detection as well as non-coherent detection aided cooperative H-ARQ schemes are considered. In the perfect coherent detection based pilot symbol assisted scheme, a novel relay-switching aided H-ARQ scheme is proposed for mitigating the effects of correlation in fading wireless channels, followed by a H-ARQ scheme employing systematic Luby transform codes. In contrast to the unrealistic perfect coherent detection, realistic imperfect coherent schemes are studied, where the channel impulse responses are imperfectly estimated. Furthermore, non-coherent differential detection aided cooperative H-ARQ schemes are proposed and compared to their coherent detection assisted counterparts. Finally, a novel cooperative H-ARQ arrangement based on distributed space-time codes is proposed for the sake of improving the attainable system throughput, while reducing the system’s complexity.

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Chtourou, Ameni. « Contextual communication for intelligent transportation systems in hybrid networks ». Electronic Thesis or Diss., université Paris-Saclay, 2021. http://www.theses.fr/2021UPASG116.

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Un rôle important des C-ITS est d'élargir la perception des usagers de la route afin d'éviter les accidents de la route. Une telle perception étendue est construite par l'échange d'informations entre les véhicules, les piétons et l'infrastructures à l'aide de différents types de messages, notamment le message CAM et le message de perception collective (CPM). Bien que les données transportées par ces messages soient critiques, elles consomment beaucoup de ressources. Actuellement, les CAM et les CPM sont diffusés périodiquement avec une fréquence minimale de 1 Hz. De plus, leurs fréquences peuvent être adaptées en fonction de la dynamique du véhicule (vitesse, accélération,...) et en outre avec l'état du canal sans fil lorsqu'une fonctionnalité de contrôle de congestion distribué (DCC) est activée. Cependant, il peut être vital pour un véhicule de transmettre ses informations à un débit élevé dans les zones critiques, telles que les intersections, même si cela peut entraîner un taux d'occupation de canal (CBR) plus élevé. Au contraire, les véhicules à faible risque de collision peuvent réduire leur fréquence de transmission pour éviter une charge inutile sur le canal. Par conséquent, la diffusion de tels messages doit être effectuée de manière efficace afin que les exigences d'application de la sécurité routière soient garanties et que l'utilisation des ressources soit optimisée.Cela nécessite que la communication soit contextuelle, capable de contrôler les paramètres de communication en tenant compte des exigences de l'application, de la disponibilité des technologies de communication et des ressources radio ainsi que des conditions environnementales (configuration des routes, densité du trafic, présence d'infrastructures en bordure de route, etc.) . Par conséquent, établir des contextes qui caractérisent les informations collectées environnementales et non environnementales est un défi majeur pour la communication contextuelle.La thèse vise à étudier et à développer une communication contextuelle pour les applications de sécurité routière. L'objectif principal est de concevoir des algorithmes capables d'optimiser la communication V2X sur la base d'une reconnaissance des contextes, notamment la disponibilité des ressources radio, les conditions environnementales et les exigences de l'application. Le travail comprend deux phases. Dans la première phase, nous présentons une architecture de communication contextuelle et nous modélisons des contextes en termes d'exigences applicatives (contexte1) et de contexte environnemental (contexte2). Le premier contexte vise à définir les exigences de l'application et à évaluer les performances des stratégies de diffusion des messages CAM par rapport aux exigences. Le contexte environnemental particulièrement la disponibilité de l'infrastructure permettant une communication I2V qui peut remplacer la communication V2V dans cette zone locale, ce qui améliore la perception collective et réduit la charge du canal grâce à sa plus grande couverture de communication et son plus large champ de vision de capteurs. La deuxième phase vise à concevoir et développer des algorithmes qui contrôlent le contenu des messages en tenant compte des contextes préalablement modélisés tout en assurant un haut niveau de perception/conscience collective
An important role of C-ITS is to extend perception of individual road users so that traffic accidents are avoided. Such an extended perception is built by information exchange among vehicles, pedestrians, and infrastructure using different types of messages including cooperative awareness message (CAM) and Collective Perception Message (CPM). While data carried by these messages are critical, they are resource-consuming. Currently, CAMs and CPMs are broadcasted periodically with a minimum frequency of 1Hz. In addition, their frequencies can be adapted based on vehicle dynamics (speed, acceleration,...) and further with wireless channel condition when a distributed congestion control (DCC) functionality is enabled. However, it might be vital for a vehicle to transmit its beacons at a high rate in critical areas, such as intersections, even if this may result in higher channel busy ratio (CBR). On the contrary, vehicles with a low risk of collision may reduce their transmission frequency to avoid unnecessary load on the channel. Hence, dissemination of such messages must be made in an efficient way so that road safety application requirement is ensured and resource utilization is optimized.This requires the communication be context-aware, being able to control communication parameters by taking into account application requirements, availability of communication technologies and radio resources as well as environmental condition (road layout, traffic density, presence of roadside infrastructure, and etc.). Hence, establishing contexts that characterize environmental and non-environmental collected information is a key challenge for context-aware communication.The thesis targets at studying and developing context aware communication for road safety applications. The main goal is to design algorithms that are able to optimize V2X communication based on a recognition of the contexts particularly radio resource availability, environmental condition and application requirements. The work consists of two phases. In the first phase, we present context aware communication architecture and study/model contexts in terms of application requirement (context1) and environmental context (context2). The first context aims to define application requirement and evaluate performances of Cooperative Awareness Service strategies against requirements. Environmental context consists on infrastructure availability allowing I2V communication that may replace V2V communication in that local area resulting in improved collective perception and reduced channel load thanks to its larger communication coverage and sensor field of view. The second phase intends to design and develop algorithms that control/select message data contents taking into account contexts previously modeled while ensuring a high level of collective perception/awareness

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Huang, Hong. « Hybrid and resilient WDM mesh optical networks ». Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/15751.

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Chu, Man Kin. « A hybrid approach for mobile location estimation in cellular radio networks ». HKBU Institutional Repository, 2006. http://repository.hkbu.edu.hk/etd_ra/672.

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Livres sur le sujet "Hybrid communicating systems"

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Yupapin, Preecha P. Nanoscale signal processing for hybrid computer communications. Hauppauge, N.Y : Nova Science Publishers, 2011.

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Yang, Kai, Minwei Shi, Hang Yuan et Zhitong Ni. Millimeter-Wave Communication Systems : Network Analysis and Hybrid Precoding Design. Singapore : Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9621-3.

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Way, Winston I. Broadband hybrid fiber/coax access system technologies. San Diego : Academic Press, 1999.

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Sum, Lai Wai, Jewell Sam T et Society of Photo-optical Instrumentation Engineers., dir. Hybrid fiber-coax systems : 23-24 October, 1995, Philadelphia, Pennsylvania. Bellingham, Wash : SPIE, 1995.

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Conference on Optical/Hybrid Access Networks (5th 1993 Montréal, Québéc). Conference proceedings : 5th Conference on Optical/Hybrid Access Networks : September 7-9, 1993, Montréal, Canada. Piscataway, N.J : IEEE Service Center, 1993.

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Wang, Fu-Quan. A hybrid M-algorithm/sequential decoder for convolutional and Trellis codes. Notre Dame, Ind : Dept. of Electrical Engineering, University of Notre Dame, 1990.

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Wang, Fu-Quan. A hybrid M-algorithm/sequential decoder for convolutional and Trellis codes. Notre Dame, Ind : Dept. of Electrical Engineering, University of Notre Dame, 1990.

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Wang, Fu-Quan. A hybrid M-algorithm/sequential decoder for convolutional and Trellis codes. Notre Dame, Ind : Dept. of Electrical Engineering, University of Notre Dame, 1990.

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International Workshop on Optical Hybrid Access Networks/Full Service Access Networks (10th 2001 Yokohama, Japan). Proceedings, 10th International Workshop on Optical Hybrid Access Networks/Full Service Access Networks (OHAN/FSAN) 2001 : April 4-6, 2001, Yokohama Grand Inter-Continental Hotel, Yokohama, Japan. [Japan : s.n., 2001.

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International Conference on Mobile, Hybrid, and On-line Learning (1st 2009 Cancún, Mexico). eLmL 2009 : International Conference on Mobile, Hybrid, and On-line Learning : proceedings : 1-7 February 2009, Cancún, Mexico. Sous la direction de Lawrence Elaine et IEEE Xplore (Online service). Los Alamitos, Calif : IEEE Computer Society, 2009.

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Chapitres de livres sur le sujet "Hybrid communicating systems"

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Dang, Thao, Goran Frehse, Antoine Girard et Colas Le Guernic. « Tools for the Analysis of Hybrid Models ». Dans Communicating Embedded Systems, 227–51. Hoboken, NJ, USA : John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118558188.ch7.

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Hur, Yerang, Jesung Kim, Insup Lee et Jin-Young Choi. « Sound Code Generation from Communicating Hybrid Models ». Dans Hybrid Systems : Computation and Control, 432–47. Berlin, Heidelberg : Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-24743-2_29.

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Strubbe, Stefan, et Arjan van der Schaft. « Bisimulation for Communicating Piecewise Deterministic Markov Processes (CPDPs) ». Dans Hybrid Systems : Computation and Control, 623–39. Berlin, Heidelberg : Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-31954-2_40.

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Dang, Thao, et Tarik Nahhal. « Using Disparity to Enhance Test Generation for Hybrid Systems ». Dans Testing of Software and Communicating Systems, 54–69. Berlin, Heidelberg : Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-68524-1_6.

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Brieger, Marvin, Stefan Mitsch et André Platzer. « Uniform Substitution for Dynamic Logic with Communicating Hybrid Programs ». Dans Automated Deduction – CADE 29, 96–115. Cham : Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-38499-8_6.

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AbstractThis paper introduces a uniform substitution calculus for $${\textsf {d{}L}} {}_{\text {CHP}}$$ d L CHP , the dynamic logic of communicating hybrid programs. Uniform substitution enables parsimonious prover kernels by using axioms instead of axiom schemata. Instantiations can be recovered from a single proof rule responsible for soundness-critical instantiation checks rather than being spread across axiom schemata in side conditions. Even though communication and parallelism reasoning are notorious for necessitating subtle soundness-critical side conditions, uniform substitution when generalized to $${\textsf {d{}L}} {}_{\text {CHP}}$$ d L CHP manages to limit and isolate their conceptual overhead. Since uniform substitution has proven to simplify the implementation of hybrid systems provers substantially, uniform substitution for $${\textsf {d{}L}} {}_{\text {CHP}}$$ d L CHP paves the way for a parsimonious implementation of theorem provers for hybrid systems with communication and parallelism.

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Weik, Martin H. « hybrid communications system ». Dans Computer Science and Communications Dictionary, 740. Boston, MA : Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_8528.

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Bujorianu, Luminita Manuela. « Stochastic Hybrid Systems ». Dans Communications and Control Engineering, 55–85. London : Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2795-6_4.

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Weik, Martin H. « hybrid system ». Dans Computer Science and Communications Dictionary, 741. Boston, MA : Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_8541.

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Reyes, Rhodora L., et Raymund C. Sison. « Agent Representation and Communication in CBR-Tutor ». Dans Hybrid Information Systems, 459–68. Heidelberg : Physica-Verlag HD, 2002. http://dx.doi.org/10.1007/978-3-7908-1782-9_33.

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Eltaief, Hamdi, Kawther Thabet et El Kamel Ali. « Securing East-West Communication in a Distributed SDN ». Dans Hybrid Intelligent Systems, 1225–34. Cham : Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-27409-1_112.

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Actes de conférences sur le sujet "Hybrid communicating systems"

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Smith, Julie, Christos Christodoulou, Chadwick Lindstrom et Matthew Simone. « Channel selection of hybrid communication systems using machine learning ». Dans Laser Communication and Propagation through the Atmosphere and Oceans XIII, sous la direction de David T. Wayne, Jaime A. Anguita et Jeremy P. Bos, 32. SPIE, 2024. http://dx.doi.org/10.1117/12.3027275.

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Rajahrajasingh, Hanojhan, Dushantha Nalin K. Jayakody, P. Muthuchidambaranathan et Rui Dinis. « Hybrid VLC Systems with Terahertz Communication : A Performance Analysis ». Dans 2024 IEEE 100th Vehicular Technology Conference (VTC2024-Fall), 1–5. IEEE, 2024. https://doi.org/10.1109/vtc2024-fall63153.2024.10757556.

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Qin, Ruonan, Bing Han, Zhukai Zhang et Xuanyu Shi. « Implementation of Socket-based Industrial Hybrid Communication System ». Dans 2024 IEEE 4th International Conference on Information Technology, Big Data and Artificial Intelligence (ICIBA), 840–43. IEEE, 2024. https://doi.org/10.1109/iciba62489.2024.10868578.

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Bravo, M. C., J. Perez, V. J. Sosa, A. Montes et G. Reyes. « Ontology support for communicating agents in negotiation processes ». Dans Fifth International Conference on Hybrid Intelligent Systems (HIS'05). IEEE, 2005. http://dx.doi.org/10.1109/ichis.2005.83.

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Wang, Shuling, Zekun Ji, Xiong Xu, Bohua Zhan, Qiang Gao et Naijun Zhan. « Formally Verified C Code Generation from Hybrid Communicating Sequential Processes ». Dans 2024 ACM/IEEE 15th International Conference on Cyber-Physical Systems (ICCPS). IEEE, 2024. http://dx.doi.org/10.1109/iccps61052.2024.00018.

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Lal, Ratan, et Pavithra Prabhakar. « Safety analysis using compositional bounded error approximations of communicating hybrid systems ». Dans 2017 IEEE 56th Annual Conference on Decision and Control (CDC). IEEE, 2017. http://dx.doi.org/10.1109/cdc.2017.8263997.

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Bandara, K. R. Damindra S., Anthony P. Melaragno, Duminda Wijesekara et Paulo Costa. « Multi-Tiered Cognitive Radio Network for Positive Train Control Operations ». Dans 2016 Joint Rail Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/jrc2016-5784.

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Positive Train Controller (PTC) is a communication based system designed to enforce PTC safety objectives for trains such as train-to-train collisions, train derailments, and ensure railroad worker safety. Existing PTC designs consider risks due to operational environment such as location of other trains, switches, and speed limits. We propose to enhance PTC by using a multi-tiered cognitive radio network that considers multiple risks such as those due to bandwidth congestion, packet length limitations, propagation losses, detectable exploitation of Software Defined Radio vulnerabilities, and protocol vulnerabilities. Radios operating at PTC nodes (such as train, WIU and Base station) is equipped with a cognitive layer, which communicates with other nodes to create a cognitive radio network. The proposed network as a whole strives to provide spectrum management and security for the radio communication system, which can enhance the PTC functionality. Each cognitive radio in our proposed network consists of multiple tiers. The upper tier consists of a master cognitive engine that holistically evaluates the operational risks of the network and acts to mitigate them using the lower tiers. The lower tier (immediate slave tier to the master) consists of sub cognitive engines for cryptographic operations and spectrum management. The traditional PTC protocol is implemented at a lower tier module that interface with the master Cognitive Engine (CE). The master-slave communications within one radio is implemented using middleware. The proposed cognitive radio network can be modeled as a cyber-physical system by incorporating train movement dynamics, radio transmission characteristics and cryptographical computations, thereby constituting a distributed system of communicating hybrid automatons. This design enables us to verify safety and the security of the system using formal methods, which constitutes our ongoing work. We also discuss potential issues such as FRA mandated safety cases that needs to be addressed if the proposed features are to be added to the PTC systems.

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Schroeder, Christopher C., et Mohammad H. Elahinia. « Research and Education With a Hydraulic Hybrid Vehicle Laboratory ». Dans ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-69227.

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This paper presents the development of a hydraulic hybrid vehicle (HHV) based laboratory course for the Mechanical, Industrial, and Manufacturing Engineering Department at the University of Toledo. The objective of the laboratory course is to serve as both an educative tool as well as a tool in advancing the research of HHV technologies. The laboratory consists of a HHV test stand that approximates the workings of a series type HHV and an accompanying simulation model of the system. The course is based on a problem-solving learning approach that will aid students in gaining a fuller understanding of the fundamentals from core mechanical engineering curriculum including: Fluid Dynamics, Energy Systems, Vibrations, Mechatronics and Control. This course is unique in that the instructor serves a guide or manager for the students and does not evaluate the student based on exams rather, the student is evaluated based on his/her ability to apply engineering principles. After learning some basics of research and performing a literature review of the subject, the students will be asked to solve a problem and report their findings in a technical publication format. The students are evaluated based on their performance in applying engineering principles towards the solution of a relevant engineering problem and effectively communicating that via a conference publication candidate. In this way, a better index for evaluating student mastery of engineering principles is achieved and a gaping hole in the Mechanical Engineering curriculum is filled while at the same time offering an efficient means of advancing HHV technology.

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Grimm, Daniel, Marc Weber et Eric Sax. « An Extended Hybrid Anomaly Detection System for Automotive Electronic Control Units Communicating via Ethernet - Efficient and Effective Analysis using a Specification- and Machine Learning-based Approach ». Dans 4th International Conference on Vehicle Technology and Intelligent Transport Systems. SCITEPRESS - Science and Technology Publications, 2018. http://dx.doi.org/10.5220/0006779204620473.

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Scheianu, Andrei, George Suciu, Ioana Petre et Alexandru Drosu. « HYBRID VLC COMMUNICATIONS SYSTEM FOR E-LEARNING BASED ON THE ARM CORTEX-A53 PROCESSOR ». Dans eLSE 2020. University Publishing House, 2020. http://dx.doi.org/10.12753/2066-026x-20-115.

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VLC (Visible Light Communications) technology represents nowadays a new paradigm that could have a significant impact on future wireless communications. Although this technology has many advantages, one of the most common problem generated by the use of optical communication systems (based on the light in the visible spectrum), is the increased degree of disruption of the communication channel under the direct sunlight influence. The purpose of this article is to present the technological developments specific to the VLC/IR-RF (Visible Light Communication / Infrared - Radio-Frequency) hybrid system developed in the framework of a scientific research project started in 2017, which were recorded during the first half of 2019. This system based on multiple sensory devices such as temperature, motion, light intensity, dust, IR and microbolometer sensors will present the ability of intelligent monitoring and control of indoor environments (houses, office buildings, universities, campuses, etc.). From the point of view of the final purpose of the project, this will result in a hybrid bidirectional optical communication system capable of supporting high transfer rates, increased resistance to the specific sunlight disturbance, and the possibility of transmitting sensory information over long distances. The previous experimentation activities undertaken during the project were based on the use of the Arduino UNO development boards. Currently, it has been chosen to replace them with the development boards based on the ARM Cortex-A53 processor, in order to improve the system's performance. The Arduino development boards have limited the performance of the communications system from the point of view of the transfer speeds and distances. The new Raspberry Pi development boards, being a complete operating and control system, presents high operational performances that can be used in favor of the final goal of the project.

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Rapports d'organisations sur le sujet "Hybrid communicating systems"

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Zhang, Jianhua, S. M. Shafiul Alam, Anthony R. Florita, Adarsh Hasandka, Jin Wei-Kocsis, Dexin Wang, Liuqing Yang et Brian S. Hodge. Opportunistic Hybrid Communications Systems for Distributed PV Coordination. Office of Scientific and Technical Information (OSTI), mars 2020. http://dx.doi.org/10.2172/1606149.

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Nikulin, Vladimir V. Hybrid Steering Systems for Free-Space Quantum Communication. Fort Belvoir, VA : Defense Technical Information Center, mars 2007. http://dx.doi.org/10.21236/ada465734.

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Pasupuleti, Murali Krishna. Scalable Quantum Networks : Entanglement-Driven Secure Communication. National Education Services, mars 2025. https://doi.org/10.62311/nesx/rrvi525.

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Abstract: Scalable quantum networks, powered by entanglement-driven secure communication, are poised to revolutionize global information exchange, cybersecurity, and quantum computing infrastructures. Unlike classical communication systems, quantum networks leverage quantum entanglement and superposition to enable ultra-secure data transmission, quantum key distribution (QKD), and instantaneous information sharing across large-scale networks. This research explores the fundamental principles of entanglement-based communication, the role of quantum repeaters, quantum memory, and multi-nodal entanglement distribution in overcoming photon loss, decoherence, and distance limitations in quantum networks. Additionally, it examines the hybrid integration of quantum-classical networking architectures, real-world experimental implementations such as satellite-based quantum communication and metropolitan-scale quantum cryptography, and the scalability challenges related to hardware, error correction, and network synchronization. The study also addresses post-quantum cryptography, quantum-resistant algorithms, and cybersecurity vulnerabilities in quantum communication, offering a comprehensive roadmap for the development of secure, scalable, and globally interconnected quantum networks. Keywords: Scalable quantum networks, quantum entanglement, entanglement distribution, quantum key distribution (QKD), secure communication, quantum repeaters, quantum memory, photon loss mitigation, quantum cryptography, post-quantum security, hybrid quantum-classical networks, metropolitan-scale quantum networks, satellite-based quantum communication, quantum internet, quantum coherence, quantum error correction, quantum teleportation, multi-nodal quantum entanglement, cybersecurity in quantum networks, quantum-resistant algorithms.

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Ekström, Thomas. Kunskapsöversikt : Lärdomar från Ukraina med relevans för svensk infrastruktur. Swedish Defence University, 2024. https://doi.org/10.62061/xjyn5209.

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The Russian war in Ukraine is a humanitarian disaster for the Ukrainian people. However, the people, and indeed the whole society, has demonstrated a remarkable resilience. There is consequently much that other countries can learn by studying how Ukraine has been able to muster such resilience in the face of the Russian full-scale invasion. This report focuses on what Swedish authorities in the communications, energy and transportation sectors can learn from what academics, organisations, and nations have already published regarding resilience in critical infrastructure systems. Judging by the war in Ukraine, modern warfare is hybrid warfare, which combines kinetic and cyberwarfare. Between 2014 and 2022 Ukrainian critical infrastructure systems were frequently targeted by cyberattacks. This learning experience, together with help from, among others, NATO, enabled Ukraine to be well prepared for cyber warfare. Ukraine also received crucial help from multinational Big Tech companies in the early stages of the war, which helped the nation to withstand the cyberattacks on its critical infrastructure systems. However, Ukraine was not equally well prepared for kinetic warfare against these systems. This is illustrated by the lack of air defence and the fact that nuclear power plants were guarded against terrorist attacks, not kinetic warfare. Consequently, Ukraine has had to address the consequences of kinetic warfare with impromptu, reactive solutions, rather than with proactive preparedness. Based on a meta-analysis of 132 research articles, books and reports, this report primarily analyses the impromptu, reactive solutions against kinetic warfare. The report identifies several different areas of reactive solutions, which could have been part of proactive preparedness to a larger extent: legislation, learning, staffing, decentralisation, redundancy, adaptability, layered protection, low-tech technologies, changing consumption patterns, repair planning, international and public-private cooperation, and differentiated energy production. To address these challenges in its preparedness planning would make Sweden better prepared for the type of war that is now taking place in Ukraine, than Ukraine was on February 24, 2022. Prior to trying to emulate Ukraine’s impromptu, reactive solutions against kinetic warfare there are several considerations to be made by Swedish authorities. Ukraine had a well-developed cyber defence, unmodernised infrastructure systems, and received significant international aid. Furthermore, because of its size, geography, population, and natural resources, its infrastructure systems have different network structures than the Swedish ones and are dimensioned for much larger requirements.

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Solomin, Eugen. SOVIET-RUSSIAN PROPAGANDA AS A WAY TO PROMOTE NARRATIVES AND INTERFERE IN THE INFORMATION SPACE : REGIONAL ASPECT. Ivan Franko National University of Lviv, mars 2024. http://dx.doi.org/10.30970/vjo.2024.54-55.12152.

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The article updates the activities of regional broadcasters in the information space of the Luhansk region, where numerous enemy information attacks preceded the invasion of the Russian occupation forces. Main objective of the study - mass media activities of the Luhansk region’s television companies in the pre-war and post-war periods and the specifics of the integration of the (pro) Russian agenda into the region’s information space. The study was done out using a descriptive, classification, comparative-historical method, which made it possible to consider the regional telespace in the context of historical transformations and highlight stages in development, identify system-forming factors, which made it possible to move from the consideration of certain elements to the analysis of the system. Conclusions. The mass communication activities of the Luhansk region’s television companies in different historical periods have shown their ability to maintain the regional media field, the diversity and variety of content. However, the media sphere was not devoid of Soviet party ideology (1958-1991), with its subsequent post-Soviet modification and political layering (1991-2004) of anti-Ukrainian forces; with the saturation (2004-2014) of the information space with non-Ukrainian information flows and the promotion of symbols, worldview and philosophical concepts of the updated Soviet ideology – the «Russkiy mir» and its further functioning (2014-2022) in the conditions of real military operations in the East of Ukraine. Significance. During the ongoing war, Ukraine’s experience can be used in research on Russian information interference, inciting enmity, hatred between peoples, promoting narratives in the Ukrainian and international information space, verifying the criteria for distinguishing between information destructive to democracy and a valid expression of freedom of speech, and creating an international platform for exchange information about threats, misinformation, narratives and their rapid leveling. Keywords: regional television, information war, media space, content, information flows, hybrid war.

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