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Literatura académica sobre el tema "Decentralized transmission"

Autor: Grafiati

Publicado: 25 de mayo de 2024

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Artículos de revistas sobre el tema "Decentralized transmission"

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Xu, Dianhui y Yingwei Yao. "Contention-Based Transmission for Decentralized Detection". IEEE Transactions on Wireless Communications 11, n.º 4 (abril de 2012): 1334–42. http://dx.doi.org/10.1109/twc.2012.020712.101742.

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Yin, Yingying y Leilei Deng. "A dynamic decentralized strategy of replica placement on edge computing". International Journal of Distributed Sensor Networks 18, n.º 8 (agosto de 2022): 155013292211150. http://dx.doi.org/10.1177/15501329221115064.

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Smart phone and its applications are used more and more extensively in our daily life. Short delay of arriving data is important to these applications, especially to some time-sensitive ones. To reduce transmission latency and improve user experience, a dynamic decentralized data replica placement and management strategy which works in edge nodes is proposed in this article. It studies the location, access frequency, latency improvement, and cost spent on placing replicas on edge nodes to seek a balance between cost spent for storage and reduced latency. Specifically, dynamic and decentralized replica placement strategy algorithm has load guarantee for edge nodes to avoid overload; it dynamically create or delete data replicas on edge nodes according to the request frequency. Dynamic and decentralized replica placement strategy is decentralized to relieve transmission cost. Experiment results show that dynamic and decentralized replica placement strategy algorithm in edge computing environments can greatly reduce transmission latency, balance edge nodes load, and improve system performance. Dynamic and decentralized replica placement strategy also considers the cost spent for storage, and it pursues a balance between many factors.

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Zhang, Lifeng, Celimuge Wu, Tsutomu Yoshinaga, Xianfu Chen, Tutomu Murase y Yusheng Ji. "Multihop Data Delivery Virtualization for Green Decentralized IoT". Wireless Communications and Mobile Computing 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/9805784.

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Decentralized communication technologies (i.e., ad hoc networks) provide more opportunities for emerging wireless Internet of Things (IoT) due to the flexibility and expandability of distributed architecture. However, the performance degradation of wireless communications with the increase of the number of hops becomes the main obstacle in the development of decentralized wireless IoT systems. The main challenges come from the difficulty in designing a resource and energy efficient multihop communication protocol. Transmission control protocol (TCP), the most frequently used transport layer protocol for achieving reliable end-to-end communications, cannot achieve a satisfactory result in multihop wireless scenarios as it uses end-to-end acknowledgment which could not work well in a lossy scenario. In this paper, we propose a multihop data delivery virtualization approach which uses multiple one-hop reliable transmissions to perform multihop data transmissions. Since the proposed protocol utilizes hop-by-hop acknowledgment instead of end-to-end feedback, the congestion window size at each TCP sender node is not affected by the number of hops between the source node and the destination node. The proposed protocol can provide a significantly higher throughput and shorter transmission time as compared to the end-to-end approach. We conduct real-world experiments as well as computer simulations to show the performance gain from our proposed protocol.

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Tian, Ni, Changle Li, Jun Cheng, Wenwei Yue y Maofeng Luo. "Decentralized Power Control for an ALOHA-Type Random Multiple Access System with Short Packet Transmission". Wireless Communications and Mobile Computing 2022 (22 de julio de 2022): 1–10. http://dx.doi.org/10.1155/2022/5428680.

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Machine to machine communication is an important scenario in a 6G communication network. Random multiple access has recently been revisited and considered a key technology for machine to machine communication scenarios due to many advantages such as without coordination setup time. It is a regret that packet collision probability will be extremely higher for random multiple access when massive devices randomly accessing base station. Decentralized power control is an efficient scheme in random multiple access systems which can support intraslot successive interference cancellation to recover multiple collided packets at receivers. However, existing studies of decentralized power control for random multiple access are with the assumption that blocklength of transmitted packets is infinite, which neglects that machine to machine communication is characterized by finite blocklength transmission (i.e., short packet) in 6G. This paper focuses decentralized power control with short packet transmission in random multiple access systems. First, the closed-form expression of signal to interference plus noise ratio (SINR) threshold for short packets is derived. Then, decentralized transmission power profile is defined based on derived SINR threshold of short packets, which can support intraslot successive interference cancellation deciding at receivers for an ALOHA-type random multiple access system. Further, we propose derivation method to maximize system throughput, which can reduce optimization cost. Theoretical findings in this paper can provide valuable benchmark for short packet transmission with decentralized power control in random multiple access systems.

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5

Parnas, I., J. Dudel y HL Atwood. "Synaptic transmission in decentralized axons of rock lobster". Journal of Neuroscience 11, n.º 5 (1 de mayo de 1991): 1309–15. http://dx.doi.org/10.1523/jneurosci.11-05-01309.1991.

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Li, Gengxian, Chundong Wang y Huaibin Wang. "Unreachable Peers Communication Scheme in Decentralized Networks Based on Peer-to-Peer Overlay Approaches". Future Internet 14, n.º 10 (12 de octubre de 2022): 290. http://dx.doi.org/10.3390/fi14100290.

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Decentralized networks bring us many benefits, but as networks evolve, many nodes either actively or passively become unreachable behind an NAT or a firewall. This has become a hindrance to the development of decentralized networks, where peer-to-peer communication data transfer between unreachable nodes cannot be accomplished, whether in decentralized file systems, decentralized social, or decentralized IoT. The existing scheme requires a series of centralized servers or requires network-wide flooding for consensus data, which can lead to the loss of decentralized nature of the network and cause flooding bottlenecks, contrary to the design concept of decentralization. In this paper, our proposed scheme uses a structured P2P overlay network to store the indexes of unreachable nodes in the whole network, so that the characteristics of a decentralized network are still maintained while ensuring the efficiency of lookup. When nodes communicate, the transmission channel is established so that both nodes continuously transmit data streams peer-to-peer without relying on the central server. Moreover, the scheme guarantees the security and privacy of nodes’ data transmission and the P2P overlay network without relying on centralized trusted institutions. Finally, we deploy a real cluster environment to verify the effectiveness of each module at different network sizes and prove the overall feasibility of the scheme. The scheme has certain advantages over existing solutions in terms of security, privacy, communication efficiency, device democracy, etc.

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Iskandarani, Mahmoud Zaki. "Vehicular Communication using Balanced Centralized and Decentralized Cluster Heads". International Journal of Circuits, Systems and Signal Processing 16 (31 de enero de 2022): 718–23. http://dx.doi.org/10.46300/9106.2022.16.88.

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A new approach to vehicular communication employing equal weights for distance and vehicular speed for centralized and decentralized communication is presented. The main objective of this work, which is to establish utilization expression and characteristics for an optimized balanced vehicular communication is achieved. The technique is based on analyzing effect of communication process (centralized, decentralized) on transmission efficiency and probability of failure. The analysis using utilization function, cluster head selection time, and end to end transmission time. The simulation and analysis concluded that the decentralization approach is more efficient compared to the centralized approach, so combination of both is proved to be effective. The work also uncovered the need for optimization of vehicular speed relative to transmission radius and use of zoning to effectively improve transmission efficiency. Mathematical models are presented that covers a critical relationship between probability of transmission failure, cluster head selection time and end to end delay. Also, an important mathematical expression that considers cluster head selection time and end to end delay and their effect on connection utilization is presented. The work proves that combined centralized and decentralized techniques using balanced weights approach is effective using dynamic weights selection algorithm that determines optimum weights for both used variables (distance, Vehicular speed).

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8

Li, Peng, Ming Yang, Yaohua Tang, Yixiao Yu y Menglin Li. "Robust Decentralized Coordination of Transmission and Active Distribution Networks". IEEE Transactions on Industry Applications 57, n.º 3 (mayo de 2021): 1987–94. http://dx.doi.org/10.1109/tia.2021.3057342.

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Kaushik, Shweta y Charu Gandhi. "Fine Grained Decentralized Access Control With Provable Data Transmission and User Revocation in Cloud". International Journal of Information Security and Privacy 15, n.º 2 (abril de 2021): 29–52. http://dx.doi.org/10.4018/ijisp.2021040102.

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Cloud computing started a new era for IT enterprises. It allows the movement of application from local to remote location, massive data storage. Owner has access to centralized or decentralized data storage server, where data management handled by remote vendor. But, the heterogeneous and dynamic nature of cloud introduces security challenges. Among them, access control and integrity checking are most important which incur high consideration. Attribute-based encryption is one of the access control technique which allows integration of access policies, attributes, and encrypted data. In this paper, a new fine-grained decentralized data access control technique with user revocation has been proposed. Here, service provider is responsible for verifying the user authenticity. The proposed schema supports integrity checking and user revocation. The integrity checking proof validates that the user data is intact and revocation mechanism will help to revoke the user in linear time. Moreover, the proposed access control and authentication schemes are decentralized and comparable to other approaches.

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Agrawal,, Jay. "Web3.0 Document Security: Leveraging Blockchain Technology". INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, n.º 04 (24 de abril de 2024): 1–5. http://dx.doi.org/10.55041/ijsrem31142.

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In the quickly developing landscape of Web3.0, ensuring the security and integrity of digital documents has become paramount. This abstract introduces a groundbreaking solution, "Web3.0 Document Security: Leveraging Blockchain Technology," which harnesses the power of blockchain to revolutionize document transmission and protection. This innovative system leverages the inherent characteristics of blockchain, such as immutability, transparency, and decentralization, to develop a secured and sealed environment for the exchange of digital documents. By utilizing smart contracts, cryptographic hashing, and decentralized storage, this application guarantees the confidentiality, integrity, and authenticity of documents in an interconnected Web3.0 world. This paper provides an overview of the key features, benefits, and implications of adopting a decentralized application as the foundation for secure document transmission in the era of Web3.0 . Keywords— Documents, Data Security, Data Integrity, Secure Transmission, Cryptography, Blockchain, Cloud Technology, Web3

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Tesis sobre el tema "Decentralized transmission"

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Liu, Kai. "A decentralized congestion management approach for the multilateral energy transaction via optimal resource allocation". Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38750107.

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Edullakanti, Mohan Reddy Srikaran R. "Single channel on/off transmission in sensor-to-fusion links for decentralized detection in sensor networks /". Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1400965431&sid=1&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Olwal, Thomas. "Dynamic power control in backbone wireless mesh networks : a decentralized approach". Phd thesis, Université Paris-Est, 2010. http://tel.archives-ouvertes.fr/tel-00598277.

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The remarkable evolution of wireless networks into the next generation to provide ubiquitous and seamless broadband applications has recently triggered the emergence of Wireless Mesh Networks (WMNs). The WMNs comprise stationary Wireless Mesh Routers (WMRs) forming Wireless Backbone Mesh Networks (WBMNs) and mobile Wireless Mesh Clients (WMCs) forming the WMN access. While WMCs are limited in function and radio resources, the WMRs are expected to support heavy duty applications : that is, WMRs have gateway and bridge functions to integrate WMNs with other networks such as the Internet, cellular, IEEE 802.11, IEEE 802.15, IEEE 802.16, sensor networks, et cetera. Consequently, WMRs are constructed from fast switching radios or multiple radio devices operating on multiple frequency channels. WMRs are expected to be self-organized, self-configured and constitute a reliable and robust WBMN which needs to sustain high traffic volumes and long "online" time. However, meeting such stringent service expectations requires the development of decentralized dynamic transmission power control (DTPC) approaches. This thesis addresses the DTPC problem for both single and multiple channel WBMNs. For single channel networks, the problem is formulated as the minimization of both the link-centric and network-centric convex cost function. In order to solve this issue, multiple access transmission aware (MATA) models and algorithms are proposed. For multi-radio multi-channel (MRMC) WBMNs, the network is modelled as sets of unified channel graphs (UCGs), each consisting of interconnected active network users communicating on the same frequency channel. For each UCG set, the minimization of stochastic quadratic cost functions are developed subject to the dynamic Link State Information (LSI) equations from all UCGs. An energy-efficient multi-radio unification protocol (PMMUP) is then suggested at the Link-Layer (LL). Predictive estimation algorithms based on this protocol are proposed to solve such objective functions. To address transmission energy and packet instabilities, and interference across multiple channels, singularly-perturbed weakly-coupled (SPWC) control problems are formulated. In order to solve the SPWC transmission power control problem, a generalized higher-order recursive algorithm (HORA) that obtains the Riccati Stabilizing Solutions to the control problem is developed. The performance behaviours of the proposed models and algorithms are evaluated both analytically and through computer simulations. Several simulations are performed on a large number of randomly generated topologies. Simulation and analytical results confirm the efficacy of the proposed algorithms compared to the most recently studied techniques

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Liu, Kai y 劉愷. "A decentralized congestion management approach for the multilateral energy transaction via optimal resource allocation". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38750107.

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Kaleva, J. (Jarkko). "Decentralized multiantenna transceiver optimization for heterogeneous networks". Doctoral thesis, Oulun yliopisto, 2018. http://urn.fi/urn:isbn:9789526219653.

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Abstract This thesis focuses on transceiver optimization for heterogeneous multi-user multiple-input multiple-output (MIMO) wireless communications systems. The aim is to design decentralized beamforming methods with low signaling overhead for improved spatial spectrum utilization. A wide range of transceiver optimization techniques are covered, with particular consideration of decentralized optimization, fast convergence, computational complexity and signaling limitations. The proposed methods are shown to provide improved rate of convergence, when compared to the conventional weighted minimum MSE (WMMSE) approach. This makes them suitable for time-correlated channel conditions, in which the ability to follow the changing channel conditions is essential. Coordinated beamforming under quality of service (QoS) constraints is considered for interfering broadcast channel. Decomposition based decentralized processing approaches are shown to enable the weighted sum rate maximization (WSRMax) in time-correlated channel conditions. Pilot-aided decentralized WSRMax beamformer estimation is studied for coordinated multi-point (CoMP) joint processing (JP). In stream specific estimation (SSE), all effective channels are individually estimated. The beamformers are then constructed from the locally estimated channels. On the other hand, with direct estimation (DE) of the beamformers, only the intended signal needs to be separately estimated and the covariance matrices are implicitly estimated from the received pilot training matrices. This makes the pilot design more robust to pilot contamination. These methods show that CoMP JP is feasible even in relatively fading channel conditions and with limited backhaul capacity by employing decentralized beamformer processing. In the final part of the thesis, a relay-assisted cellular system with decentralized processing is considered, in which users are served either directly by the base stations or via relays for WSRMax or sum power minimization subject to rate constraints. Zero-forcing and coordinated beamforming provide a trade-off between complexity, in-band signaling and spectrum utilization. Relays are shown to be beneficial in many scenarios when the in-band signaling is accounted for. This thesis shows that decentralized downlink MIMO transceiver design with a reasonable computational complexity is feasible in various system architectures even when signaling resources are limited and channel conditions are moderately fast fading
Tiivistelmä Tämä väitöskirja keskittyy lähetin- ja vastaanotinoptimointiin heterogeenisissä monikäyttäjä- ja moniantennijärjestelmissä. Tavoitteena on parantaa tilatason suorituskykyä tutkimalla hajautettuja keilanmuodostusmenetelmiä, joissa ohjaussignaloinnin tarve on alhainen. Erityisesti keskitytään hajautetun keilanmuodostuksen optimointiin, nopeaan konvergenssiin, laskennalliseen kompleksisuuteen sekä signaloinnin rajoitteisiin. Esitettyjen menetelmien osoitetaan parantavan konvergenssinopeutta ja vähentävän signaloinnin tarvetta, verrattaessa tunnettuun WMMSE-menetelmään. Nämä mahdollistavat lähetyksen aikajatkuvissa kanavissa, joissa kanavan muutosten seuraaminen on erityisen tärkeää. Näiden menetelmien osoitetaan mahdollistavan hajautetun ja priorisoidun tiedonsiirtonopeuden maksimoinnin monisolujärjestelmissä sekä aikajatkuvissa kanavissa käyttäjäkohtaisilla siirtonopeustakuilla. Pilottiavusteisten lähetys- ja vastaanotinkeilojen estimointia tutkitaan yhteislähetysjärjestelmissä. Yksittäisten lähetyskanavien estimoinnissa effektiiviset kanavat estimoidaan yksitellen, ja lähetys- ja vastaanotinkovarianssimatriisit muodostetaan summaamalla paikalliset kanavaestimaatit. Suoraestimoinnissa ainoastaan oman käyttäjän effektiivinen kanava estimoimaan erikseen. Tällöin kovarianssimatriisit saadaan suoraan vastaanotetuista pilottisignaaleista. Tämä tekee estimaateista vähemmän herkkiä häiriölle. Hajautetun yhteislähetyksen osoitetaan olevan mahdollista, jopa verrattain nopeasti muuttuvissa kanavissa sekä rajallisella verkkoyhteydellä lähettimien välillä. Viimeisessä osassa tutkitaan välittäjä-avusteisia järjestelmiä, joissa käyttäjiä palvellaan joko suoraan tukiasemasta tai välittäjä-aseman kautta. Optimointikriteereinä käytetään siirtonopeuden maksimointia sekä lähetystehon minimointia siirtonopeustakuilla. Nollaanpakottava sekä koordinoitu keilanmuodostus tarjoavat valinna laskennallisen kompleksisuuden, ohjaussignaloinnin sekä suorituskyvyn välillä. Välittäjä-avusteisen lähetyksen osoitetaan olevan hyödyllisiä useissa tilanteissa, kun radiorajanpinnan yli tapahtuvan signaloinnin tarve otetaan huomioon keilanmuodostuksessa. Tässä väitöskirjassa osoitetaan hajautetun keilanmuodostuksen olevan mahdollista verrattaen vähäisillä laskennallisilla resursseilla heterogeenisissä moniantennijärjestelmissä. Esitetyt menetelmät tarjoavat ratkaisuja järjestelmiin, joissa ohjaussignalointiresurssit ovat rajallisia ja radiokanava on jatkuvasti muuttuva

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Tor, Osman Bulent. "Congestion-driven Transmission Planning Considering Incentives For Generator Investments". Phd thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/12609625/index.pdf.

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This thesis study focuses on transmission expansion planning (TEP) problem for restructured power systems and addresses challenges specifically in countries where electricity market is in developing phase after liberalization of power industry for establishing a competitive market, like Turkey. A novel multi-year TEP approach is developed which considers generation investment cost and transmission congestion level in the planning horizon. The model assesses the impact of generation investments on TEP problem. Benders decomposition methodology is utilized successfully to decompose the complex mixed-integer programming TEP problem into a master problem and two subproblems. Security subproblem assesses single-contingency criteria. Transmission congestion cost is considered within operational subproblem given that congestion level is a proper criterion for measuring competitiveness level of an electricity market. The proposed approach is applied to the Turkish power system. The proposed approach could be utilized to provide indicative plans, which might be quite necessary particularly during development of a competitive market. However, there is no guarantee that independent power producers (IPPs) will follow those plans which concern the maximization of social-welfare. Given the necessity of coordinating monopoly transmission and decentralized generator investment decisions, the proposed approach is improved further to include promoting decentralized generator investments through incentive payments. Such incentives might be necessary to trigger IPPs earlier than their projections, as illustrated by numerical examples including IEEE 30-bus system.

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Fan, Ying. "A game theoretic modeling framework for decentralised transmission planning". Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/31399.

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During the last two decades, significant efforts towards the deregulation of the electricity industry have been observed worldwide, involving the unbundling of vertically integrated monopoly utilities, the introduction of competition in the generation and supply sectors, and the open access to the electricity network. In contrast with traditionally regulated paradigm, deregulation calls for more involving participants for bringing more competition. In order to facilitate the participation of large number of players, a novel market structure, where individual player seeking for its own interest, is proposed by a project called 'Autonomic Power System'; according to which, the new structure will accommodate both the operation(short-term) and investment(long-term) need for the future complex electricity market in decentralised pattern. Specifically, players are encouraged to enter the market and participate in the sectors they are interested in. Players can be existing and new generating units, demand suppliers that represent aggregated customers and even merchant companies who are neither generating units nor demand suppliers. The sectors they could participate include power scheduling, generation investment and transmission network investment etc. Game theory and Agent-based modelling are both good tools to model the behaviours of numerous players and their mutual effect with each other. A central entity will be present for reconciling conflicting objectives if necessary. In this thesis, due to the incompetence in allocating investment cost among system users given traditional centralised planning paradigm, we mainly focus on proposing methods for decentralised investing in the network; under which circumstance, transmission planning will rely on market forces and profit-driven decisions of self-interested players. This paradigm will gain continuous grounds as it accounts for the interests of the different market agents and is deemed as a further step towards the liberalisation and efficient operation of the electricity industry. An iterative method is employed to search for Nash equilibrium of the game and a heuristic approach is adopted for deriving a coordinated solution when no or multiple NE are reached. Case studies will demonstrate the individual investment intentions for different situations and the physical/economic significance of the obtained solutions.

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8

Näslund, Olov. "VA-system i omvandlingsområden - vad kostar de?" Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-308366.

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När fler människor flyttar ut till sina fritidshus och bor där hela året om bildas så kallade omvandlingsområden där användningen av vatten och avlopp förändras. Detta leder ofta till högre vattenanvändning och kraven på avloppssystemen ökar därmed. Det finns tre huvudtyper av lösningar som vanligtvis används för att möta kravet på bättre avloppssystem i omvandlingsområden: enskilda lösningar på varje fastighet, en samfälld lösning eller en lösning i kommunal regi. Syftet med studien var att utvärdera kostnader för VA-system i omvandlingsområden i Sverige. Fem olika områden studerades med avseende på beräknade kostnader jämfört med det verkliga utfallet. Beräkningar gjordes på totala investeringskostnader, kostnad per fastighet såväl som kapitalkostnad och drift- och underhållskostnad. Jämförelser gjordes också med andra lösningar som var aktuella innan området byggde ut den valda VA-lösningen. Arbetet berörde även metodiken för hur kommuner väljer VA-system i omvandlingsområden. Det var billigare för en samfällighetsförening, 1 000 kr/m, att gräva ledningar än för en kommun, 4 400 - 5 900 kr/m. Grundare ledningsgravar var en av orsakerna till detta. En annan slutsats var att befintlig infrastruktur från tidigare VA-system kan göra samma typ av VA-system billigare om delar av det befintliga fortfarande är i gott skick. Driftkostnaden för enskilda system beror mycket på hur många personer som nyttjar systemet och under hur stor del av året. Vid samtal med kommuner framkom det att valet av VA-system i omvandlingsområden i regel inte föregås av en jämförelse mellan olika VA-system. Istället är det oftast en överföringsledning till ett befintligt kommunalt nät som väljs.
More and more people choose to live permanently in houses built as vacation houses, thereby creating transition areas. The increased occupancy in the houses tends to lead to larger water usage and often demands improved wastewater systems. There are three main ways in which this demand usually is met: each property builds an on-site system, the properties jointly build a facility through a community association, or the properties connect to the municipality’s network. The aim was to evaluate the costs of water and wastewater systems in transition areas in Sweden. This was done by studying five different improved transition areas and comparing the estimated costs with the actual cost of the systems. Both total investment costs and cost per property were calculated, as well as capital costs, and operation and maintenance costs. How the municipalities choose the sanitation system to be implemented was also a part of the study. It was much more expensive for the municipality to build pipes than for a community association. One reason for this was shallower pipe placement. Another conclusion was that if part of a sanitation system already exists and is in good shape, this will lead to lower investment costs for a new system using that part. The operation costs for on-site systems on each property will be much higher for a family living there permanently, compared to that of a family living there only part time. Municipalities in Sweden generally do not compare different types of systems before deciding on an improved water and sanitation system in a transition area. Instead they almost always build a transmission line for water and wastewater to connect the area to an already existing centralized system.

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Bianchi, Emanuele. "Smart panel with an array of decentralised control systems for active structural acoustic control". Thesis, University of Southampton, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274667.

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Alujević, Neven. "Smart double panel with decentralised active damping units for the control of sound transmission". Thesis, University of Southampton, 2008. https://eprints.soton.ac.uk/64537/.

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This thesis presents a comprehensive study of a smart aircraft double panel for active vibroacoustic control. The control of the double panel vibration is implemented using Multi-Input-Multi-Output (MIMO) decentralised velocity feedback loops. The loops are applied via an array of electrodynamic force actuators and collocated velocity sensors. The actuators are located in an air cavity between the two panels such that they can react against the two panels. Two velocity sensors per actuator are used. Either sensor is located at the source and radiating panel footprint of an actuator. The error velocity is formed by subtracting weighted sensor outputs. In the introductory part of the thesis a survey of aircraft interior noise is given, and stateof- the-art passive and active noise control methods are presented. In Chapter two the mathematical model for the theoretical analysis of the smart double panel is formulated and a parametric study of passive sound transmission is performed using the mathematical model. In Chapter three the performance of decentralised feedback control systems using absolute and relative velocity is analysed theoretically. In Chapter four the stability and performance of decentralised feedback control systems using reactive actuators driven with weighted velocity error signals is analysed theoretically. In Chapter five the stability of decentralised feedback control systems using weighted velocity error signals and electrodynamic reactive actuators is analysed experimentally. In Chapter six the performance of decentralised feedback control systems using weighted velocity error signals and reactive actuators is analysed experimentally.

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Más fuentes

Libros sobre el tema "Decentralized transmission"

1

A decentralized software bus based on IP multicasting. [Morgantown, WV]: West Virginia University, 1995.

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Capítulos de libros sobre el tema "Decentralized transmission"

1

Mehrjerdi, Hasan, Serge Lefebvre y Maarouf Saad. "STATCOM Application for Decentralized Secondary Voltage Control of Transmission Networks". En Static Compensators (STATCOMs) in Power Systems, 531–56. Singapore: Springer Singapore, 2014. http://dx.doi.org/10.1007/978-981-287-281-4_16.

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Blinov, Ihor, Olexandr Kyrylenko, Euvgen Parus y Oksana Rybina. "Decentralized Market Coupling with Taking Account Power Systems Transmission Network Constraints". En Power Systems Research and Operation, 1–21. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-82926-1_1.

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Haque, Kazi Nymul, Johirul Islam, Ijaz Ahmad y Erkki Harjula. "Decentralized Pub/Sub Architecture for Real-Time Remote Patient Monitoring: A Feasibility Study". En Communications in Computer and Information Science, 48–65. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-59080-1_4.

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AbstractThe confluence of the Internet of Things (IoT) within the healthcare sector, called Internet of Medical Things (IoMT), has ushered in a transformative approach to real-time patient monitoring. Traditional methods that typically involve the direct transmission of medical sensor data to the cloud, falter under the constraints of medical IoT devices. In response, Multi-access Edge Computing (MEC), as defined by the European Telecommunications Standards Institute (ETSI), brings forth an innovative solution by relocating computing resources closer to the origin of data. However, MEC alone does not fully address the exigencies of constrained medical IoTs in the realm of real-time monitoring. Our architecture advances the computing continuum by seamlessly integrating local edge computing for direct data capture, MEC for nuanced data processing, and cloud computing for the comprehensive synthesis and presentation of data. This synergy is further enhanced by the introduction of a robust message queue mechanism, assuring data resilience and uninterrupted data streaming during network disruptions. With a steadfast commitment to security, our system employs stringent measures to ensure the integrity and confidentiality of sensitive patient data during transmission. This architecture represents a significant leap in healthcare technology, emphasizing the criticality of patient safety, data security, and meticulous data management. The implications of this study are profound, indicating a trajectory for future exploration into the integration of sophisticated data types and AI-driven models to further refine patient monitoring and healthcare outcomes.

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Deconinck, Geert. "Decentralised Control and Peer-To-Peer Cooperation in Smart Energy Systems". En Shaping an Inclusive Energy Transition, 121–38. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-74586-8_6.

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AbstractIn order to achieve a decarbonised energy system, change has to happen from electricity generation to the transmission grid over the distribution level all the way down to the industrial loads and the local households. To get involvement of communities in this energy transition, local participation is needed, so that the citizens can be aware of the impact of their energy-related actions on environment and climate. However, the energy system has typically been organised in a top-down fashion, with centralised approaches and little active control, resulting in passive grid and ditto customers. Smart grids have put active customers and consumer engagement as one of the cornerstones of a more intelligent energy infrastructure, which can be organised differently. Indeed, in different niches decentralised approaches have been used successfully (decoupled microgrids, peer-to-peer networks, etc.). This chapter explores how decentralised approaches can fit the future energy system and how it can empower people for engaging in the energy transition.

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Dhasarathan, Chandramohan, Shanmugam M., Shailesh Pancham Khapre, Alok Kumar Shukla y Achyut Shankar. "Blockchain-Enabled Decentralized Reliable Smart Industrial Internet of Things (BCIIoT)". En Advances in Computer and Electrical Engineering, 192–204. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-3375-8.ch013.

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The development of wireless communication in the information technological era, collecting data, and transfering it from unmanned systems or devices could be monitored by any application while it is online. Direct and aliveness of countless wireless devices in a cluster of the medium could legitimate unwanted users to interrupt easily in an information flow. It would lead to data loss and security breach. Many traditional algorithms are effectively contributed to the support of cryptography-based encryption to ensure the user's data security. IoT devices with limited transmission power constraints have to communicate with the base station, and the data collected from the zones would need optimal transmission power. There is a need for a machine learning-based algorithm or optimization algorithm to maximize data transfer in a secure and safe transmission.

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Rohling, Hermann. "OFDM Transmission Technique". En Mobile Computing, 3561–87. IGI Global, 2009. http://dx.doi.org/10.4018/978-1-60566-054-7.ch260.

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The orthogonal frequency division multiplexing (OFDM) transmission technique can efficiently deal with multi-path propagation effects especially in broadband radio channels. It also has a high degree of system flexibility in multiple access schemes by combining the conventional TDMA; FDMA; and CDMA approaches with the OFDM modulation procedure; which is especially important in the uplink of a multi-user system. In OFDM-FDMA schemes carrier synchronization and the resulting sub-carrier orthogonality plays an important role to avoid any multiple access interferences (MAI) in the base station receiver. An additional technical challenge in system design is the required amplifier linearity to avoid any non-linear effects caused by a large peak-to-average ratio (PAR) of an OFDM signal. The OFDM transmission technique is used for the time being in some broadcast applications (DVB-T; DAB; DRM) and wireless local loop (WLL) standards (HIPERLAN/2; IEEE 802.11a) but OFDM has not been used so far in cellular communication networks. The general idea of the OFDM scheme is to split the total bandwidth into many narrowband sub-channels which are equidistantly distributed on the frequency axis. The sub-channel spectra overlap each other but the sub-carriers are still orthogonal in the receiver and can therefore be separated by a Fourier transformation. The system flexibility and use of sub-carrier specific adaptive modulation schemes in frequency selective radio channels are some advantages which make the OFDM transmission technique a strong and technically attractive candidate for the next generation of mobile communications. The objective of this chapter is to describe an OFDM-based system concept for the fourth generation (4G) of mobile communications and to discuss all technical details when establishing a cellular network which requires synchronization in time and frequency domain with sufficient accuracy. In this cellular environment a flexible frequency division multiple access scheme based on OFDM-FDMA is developed and a radio resource management (RRM) employing dynamic channel allocation (DCA) techniques is used. A purely decentralized and self-organized synchronization technique using specific test signals and RRM techniques based on co-channel interference (CCI) measurements has been developed and will be described in this chapter.

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Latzel, W. "CLOSED LOOP CONTROL VIA DATA TRANSMISSION BUS IN DECENTRALIZED POWER PLANT CONTROL SYSTEMS". En Power Systems: Modelling and Control Applications, 287–93. Elsevier, 1989. http://dx.doi.org/10.1016/b978-0-08-036135-2.50051-x.

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Bayoumi, Ehab Hassan Eid, Hisham Soliman y Farag El-Sheikhi. "Robust Decentralized Voltage Tracker of Islanded Multi-DG AC Microgrids Using Invariant Ellipsoids". En Advances in Environmental Engineering and Green Technologies, 1–35. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-7447-8.ch001.

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This chapter develops a robust decentralized voltage tracker for islanded MGs. The proposed controller is robust against the plug and play operation of the MG, loads, and line parameter uncertainties. The problem is solved in the framework of linear matrix inequality (LMI). The proposed robust control represents the load changes and the parameter variations of lines connecting the DGs as a norm-bounded uncertainty. The proposed controller utilizes local measurements from DGs (i.e., it is totally decentralized). Control decentralization is accomplished by decomposing the global system into subsystems. The effect of the rest of the system on a specific subsystem is considered as a disturbance to minimize (disturbance rejection control). The controller is designed by the invariant-sets (approximated by the invariant ellipsoids). Different time-domain simulations are carried out as connecting and disconnected one or more DGs, connecting and disconnecting local loads DGs and transmission line parameters variation.

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Gupta, Vrinda, Vamsi Reddy Punugoti y Sanath Kalyan Veereju. "Blockchain-Enabled Secured Smart City Services". En Advances in Electronic Government, Digital Divide, and Regional Development, 205–29. IGI Global, 2023. http://dx.doi.org/10.4018/979-8-3693-0744-1.ch012.

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Smart city incorporates multiple living methods for the sustainability of resources. As the number of interconnected devices is expanding day by day, we need to secure the transmission of data. Blockchain is seen as a way to eliminate tampering and reduce the risks of malware threats with IoT devices and data. In smart cities, blockchain-based IoT applications can be used for a wide variety of services in a secure and decentralized way. This chapter introduces blockchain technology and how it secures the data and then explores the integration of blockchain technology in smart city services like healthcare, transportation, supply chain management, smart grid, and banking.

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Rajagopal, Dr. "Internet, Reengineering and Technology Applications in Retailing". En Business Information Systems, 1324–42. IGI Global, 2010. http://dx.doi.org/10.4018/978-1-61520-969-9.ch082.

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The rapid growth in computer technology and commercial needs have allowed significant changes in the information management systems. There emerged in early nineties many commercial network backbones to link with the NSFnet to provide market information to the business firms. The Internet today is a combination of NSFnet and commercially available backbone services disseminating information on the decentralized networks all over the world. It is estimated that there are over 30,000 computer networks connecting over 2 million computers with each other on the Web. In view of the increasing use of electronic information sources through the networks the Transmission Control Protocol/Internet Protocol (TCP/IP) has been designed and made essential for each user networks to abide with the protocol standards which enables the data transfer and retrieval at source.

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Actas de conferencias sobre el tema "Decentralized transmission"

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Ding, Fei y Kenneth A. Loparo. "Decentralized network reconfiguration and restoration for smart distribution systems — Part I: Decentralized approach". En 2014 IEEE/PES Transmission & Distribution Conference & Exposition (T&D). IEEE, 2014. http://dx.doi.org/10.1109/tdc.2014.6863196.

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Zhang, Q. L. "Decentralized transmission zeros of descriptor systems". En 29th IEEE Conference on Decision and Control. IEEE, 1990. http://dx.doi.org/10.1109/cdc.1990.203502.

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Biason, Alessandro, Subhrakanti Dey y Michele Zorzi. "Decentralized Transmission Policies for Energy Harvesting Devices". En 2017 IEEE Wireless Communications and Networking Conference Workshops (WCNCW). IEEE, 2017. http://dx.doi.org/10.1109/wcncw.2017.7919068.

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"Decentralized control with noisy transmission of information". En Proceedings of the 1999 American Control Conference. IEEE, 1999. http://dx.doi.org/10.1109/acc.1999.783607.

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Zhou, Xiangyun, Radha Krishna Ganti, Jeffrey G. Andrews y Are Hjorungnes. "Secrecy transmission capacity of decentralized wireless networks". En 2011 49th Annual Allerton Conference on Communication, Control, and Computing (Allerton). IEEE, 2011. http://dx.doi.org/10.1109/allerton.2011.6120376.

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Ilak, P., I. Rajšl, L. Herenčić, Z. Zmijarević y S. Krajcar. "Decentralized Electricity Trading in the Microgrid: Implementation of Decentralized Peer-to-Peer Concept for Electricity Trading (P2PCET)". En Mediterranean Conference on Power Generation, Transmission, Distribution and Energy Conversion (MEDPOWER 2018). Institution of Engineering and Technology, 2018. http://dx.doi.org/10.1049/cp.2018.1868.

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Contreras, Javier y George Gross. "Formulation of incentives for decentralized transmission asset investments". En 2009 IEEE Power & Energy Society General Meeting (PES). IEEE, 2009. http://dx.doi.org/10.1109/pes.2009.5275608.

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Jiang, Biao, Jia Liu, Pingliang Zeng, Yuanyuan Zhang, Xiaohui Qin y Baodi Ding. "Decentralized Transmission Network Expansion Planning Considering Carbon Trading". En 2023 3rd New Energy and Energy Storage System Control Summit Forum (NEESSC). IEEE, 2023. http://dx.doi.org/10.1109/neessc59976.2023.10349289.

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Pham, Bryan, Eric Nunnally, Christopher Huff, Nicholas Duong, Andre Smit y Alexandr Stinskiy. "Decentralized distribution automation system - scalability and deployment challenges". En 2020 IEEE/PES Transmission and Distribution Conference and Exposition (T&D). IEEE, 2020. http://dx.doi.org/10.1109/td39804.2020.9299893.

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Elizondo, Marcelo, Laurentiu Marinovici, Jianming Lian, Karanjit Kalsi y Pengwei Du. "Mitigation of remedial action schemes by decentralized robust governor control". En 2014 IEEE/PES Transmission & Distribution Conference & Exposition (T&D). IEEE, 2014. http://dx.doi.org/10.1109/tdc.2014.6863364.

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Informes sobre el tema "Decentralized transmission"

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Wicker, Steven B. Self-Configuring Wireless Transmission and Decentralized Data Processing for Generic Sensor Networks. Fort Belvoir, VA: Defense Technical Information Center, julio de 2004. http://dx.doi.org/10.21236/ada425425.

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Tobiasson, Wenche y Tooraj Jamasb. Public Acceptance in Sustainable Grid Development – A New Approach. Copenhagen School of Energy Infrastructure, 2019. http://dx.doi.org/10.22439/csei.pb.001.

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In the course of the transition from carbon extensive power generation to low carbon technologies, the electricity grid will face technical as well as non-technical challenges. Transmission systems are required to tackle the change from highly flexible, centralized generation technologies to fluctuating, unpredictable and decentralized power generation. The grid often needs to be extended to ensure security of supply. While the benefits of the projects affect the whole system, their social costs are local. This mismatch of costs and benefits is a source of conflict and requires new approaches to grid development.

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Jamasb, Tooraj, Emanuele Giovannetti, Manuel Llorca, Daniel Davi-Arderius y Golnoush Soroush. A Brief Economics of Energy Data Space: The EDDIE Project. Copenhagen School of Energy Infrastructure, 2023. http://dx.doi.org/10.22439/csei.pb.016.

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The appeal of decentralised approaches to structure energy generation, transmission and distribution networks, and consumption to scholars and practitioners has grown in the past 20-30 years. Moreover, in the coming years digitalisation will become a key enabler for the sustainable and efficient management of key areas in our economies including the energy sector. A European, decentralised, and open-source energy data space solution such as the one proposed in the Horizon Europe Innovation Action project EDDIE (European Distributed Data Infrastructure for Energy), fits into this trend. In this policy brief the authors outline their initial views on EDDIE and some economic concepts related to the project’s vision.

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A case study of Nairobi City Council's decentralised syphilis screening programme in antenatal clinics. Population Council, 2001. http://dx.doi.org/10.31899/rh2001.1000.

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It has long been known that syphilis is one of the more serious sexually transmitted infections (STI), especially during pregnancy when, if untreated, at least 60 percent of infected women will experience an adverse pregnancy outcome. There has been renewed interest in its control and prevention because of its proven link with HIV transmission. In 1992, the Nairobi City Council (NCC) pilot-tested a decentralized approach to syphilis screening and management in a sample of their antenatal clinics. A case study was carried out to assess the effectiveness, readiness, and cost effectiveness of the NCC’s antenatal care program, with a focus on the decentralized syphilis screening and treatment service. This report concludes that decentralization of maternal syphilis screening and management is feasible in a public-sector urban program, and, when implemented properly, leads to more antenatal clients and their partners being screened and treated. However, the NCC clinics are insufficiently prepared to offer good quality antenatal services and to ensure that syphilis screening and treatment are available for all antenatal clients.

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