Готові списки джерел за темами / Wakeup

Добірка наукової літератури з теми "Wakeup"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями

Оберіть тип джерела:

Зміст

Статті в журналах
Дисертації
Книги
Частини книг
Тези доповідей конференцій
Звіти організацій

Ознайомтеся зі списками актуальних статей, книг, дисертацій, тез та інших наукових джерел на тему "Wakeup".

Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.

Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.

Статті в журналах з теми "Wakeup"

Amirinasab Nasab, Mehdi, Shahaboddin Shamshirband, Anthony Chronopoulos, Amir Mosavi, and Narjes Nabipour. "Energy-Efficient Method for Wireless Sensor Networks Low-Power Radio Operation in Internet of Things." Electronics 9, no. 2 (February 12, 2020): 320. http://dx.doi.org/10.3390/electronics9020320.

Повний текст джерела

Анотація:

The radio operation in wireless sensor networks (WSN) in Internet of Things (IoT) applications is the most common source for power consumption. Consequently, recognizing and controlling the factors affecting radio operation can be valuable for managing the node power consumption. Among essential factors affecting radio operation, the time spent for checking the radio is of utmost importance for monitoring power consumption. It can lead to false WakeUp or idle listening in radio duty cycles and ContikiMAC. ContikiMAC is a low-power radio duty-cycle protocol in Contiki OS used in WakeUp mode, as a clear channel assessment (CCA) for checking radio status periodically. This paper presents a detailed analysis of radio WakeUp time factors of ContikiMAC. Furthermore, we propose a lightweight CCA (LW-CCA) as an extension to ContikiMAC to reduce the Radio Duty-Cycles in false WakeUps and idle listening though using dynamic received signal strength indicator (RSSI) status check time. The simulation results in the Cooja simulator show that LW-CCA reduces about 8% energy consumption in nodes while maintaining up to 99% of the packet delivery rate (PDR).

Стилі APA, Harvard, Vancouver, ISO та ін.

Lee, Sang Hoon, and Lynn Choi. "ZeroMAC: Toward a zero sleep delay and zero idle listening media access control protocol with ultralow power radio frequency wakeup sensor." International Journal of Distributed Sensor Networks 13, no. 8 (August 2017): 155014771771639. http://dx.doi.org/10.1177/1550147717716397.

Повний текст джерела

Анотація:

In wireless sensor networks, duty cycling has been an imperative choice to reduce idle listening but it introduces sleep delay. To break through the energy-latency tradeoff, we propose a pair of a radio wave sensor called radio frequency wakeup sensor and an on-demand media access control protocol called ZeroMAC. Radio frequency wakeup sensor is dedicated to sense the presence of a signal. The distinctive feature is that the sensor can provide the same sensitivity while it consumes only two orders of magnitude less energy than the underlying radio frequency module. With the sensor, a node no longer requires duty cycling. We also propose an on-demand media access control protocol called ZeroMAC that can effectively utilize the on-demand wakeup functionality of a radio frequency wakeup sensor by broadcasting a dedicated signal to wake up nodes before starting a communication. Since each node can notify neighbor nodes of a communication immediately, ZeroMAC can eliminate both idle listening and sleep delay. ZeroMAC wakes up only the nodes on the communication path by propagating wakeup signals in a hop-by-hop manner, avoiding unnecessary signal flooding. To further save energy, ZeroMAC can turn off radio frequency module as soon as it detects the end of communication. According to packet level simulation results, ZeroMAC can deliver data packets at least 1.87 times faster by eliminating both idle listening and sleep delay while it consumes only 3% of the energy compared to X-MAC and A-MAC.

Стилі APA, Harvard, Vancouver, ISO та ін.

Ahmed, Minhaz, Torben Dankwort, Sven Grünzig, Volker Lange, and Björn Gojdka. "Broadband Zero-Power Wakeup MEMS Device for Energy-Efficient Sensor Nodes." Micromachines 13, no. 3 (March 2, 2022): 407. http://dx.doi.org/10.3390/mi13030407.

Повний текст джерела

Анотація:

A zero-power wakeup scheme for energy-efficient sensor applications is presented in this study based on a piezoelectric MEMS energy harvester featuring wafer-level-integrated micromagnets. The proposed setup overcomes a hybrid assembly of magnets on a chip-level, a major drawback of similar existing solutions. The wakeup device can be excited at low frequencies by frequency up-conversion, both in mechanical contact and contactless methods due to magnetic force coupling, allowing various application scenarios. In a discrete circuit, a wakeup within 30–50 ms is realized in frequency up-conversion at excitation frequencies < 50 Hz. A power loss in the off state of 0.1 nW renders the scheme virtually lossless. The potential extension of battery lifetime compared to cyclical wakeup schemes is discussed for a typical wireless sensor node configuration.

Стилі APA, Harvard, Vancouver, ISO та ін.

Fischer, Michael J., Shlomo Moran, Steven Rudich, and Gadi Taubenfeld. "The Wakeup Problem." SIAM Journal on Computing 25, no. 6 (December 1996): 1332–57. http://dx.doi.org/10.1137/s0097539793254959.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Pak, Wooguil. "Ultra-low-power media access control protocol based on clock drift characteristics in wireless sensor networks." International Journal of Distributed Sensor Networks 13, no. 7 (July 2017): 155014771772215. http://dx.doi.org/10.1177/1550147717722155.

Повний текст джерела

Анотація:

Many researchers have analyzed sources of uncertainty in synchronization protocols for wireless sensor networks. However, very few researchers perform this work in depth, and failed to discover comprehensive characteristics since they worked with only one or two measurement intervals. To overcome this problem, extensive measurements were conducted and analyzed to find the characteristics of the sources according to various measurement intervals. Using the characteristics, a new media access control protocol, WideMAC, was designed to support a wide range of duty cycles for various applications. The transmission node in WideMAC calculates the wakeup time of the reception node before transmitting a packet and adaptively estimates the synchronization error size according to the synchronization interval from seconds to hours. To track the reception node’s wakeup time for synchronization, WideMAC uses two estimation algorithms that estimate the wakeup time and the upper bound of the total timing error. Accurate estimation of the wakeup time results in a significant amount of energy saving at the transmission node. Finally, through extensive performance evaluations in a testbed, WideMAC confirmed that it can significantly outperform existing state-of-the-art protocols.

Стилі APA, Harvard, Vancouver, ISO та ін.

Kang, Yimei, Bin Hu, Yi Ding, and Jingdong Tan. "A Hybrid Node Scheduling Approach Based on Energy Efficient Chain Routing for WSN." Advances in Mechanical Engineering 6 (January 1, 2014): 254761. http://dx.doi.org/10.1155/2014/254761.

Повний текст джерела

Анотація:

Energy efficiency is usually a significant goal in wireless sensor networks (WSNs). In this work, an energy efficient chain (EEC) data routing approach is first presented. The coverage and connectivity of WSNs are discussed based on EEC. A hybrid node scheduling approach is then proposed. It includes sleep scheduling for cyclically monitoring regions of interest in time-driven modes and wakeup scheduling for tracking emergency events in event-driven modes. A failure rate is introduced to the sleep scheduling to improve the reliability of the system. A wakeup sensor threshold and a sleep time threshold are introduced in the wakeup scheduling to reduce the consumption of energy to the possible extent. The results of the simulation show that the proposed algorithm can extend the effective lifetime of the network to twice that of PEAS. In addition, the proposed methods are computing efficient because they are very simple to implement.

Стилі APA, Harvard, Vancouver, ISO та ін.

Huang, Ping, Hui Yuan Xing, Xian Ju Yang, Pei Xiang Yan, Tian Lei Zhao, and Zuo Cheng Xing. "A Fast Reactivation Scheme in Power Gating Design." Applied Mechanics and Materials 135-136 (October 2011): 1134–39. http://dx.doi.org/10.4028/www.scientific.net/amm.135-136.1134.

Повний текст джерела

Анотація:

Power gating has become a popular technique to reduce the ever-increasing leakage power for commercial microprocessors or SoCs, however the wakeup energy and delay cost harm its performance. This paper proposes a fast reactivation scheme to reduce the transition delay and energy. The experiment results show that, comparing to the traditional power gating implementation, it can achieve 19.66% reactivation energy reduction, 9.28% peak leakage reduction, and 23.36% wakeup delay reduction, at the cost of 2.75% area increasing.

Стилі APA, Harvard, Vancouver, ISO та ін.

Brey, Robin L. "Wakeup Call for Insomnia." Neurology Now 2, no. 4 (July 2006): 6. http://dx.doi.org/10.1097/01222928-200602040-00005.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Polli, Gert R. "Sicherheitsfragen als Wakeup-Call." IT-Szene München 8, no. 5 (December 2013): 24–25. http://dx.doi.org/10.1007/s40567-013-0062-4.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Wakuda, Yuki, Akiko Noda, Yasuhisa Hasegawa, Fumihito Arai, Toshio Fukuda, and Mitsuo Kawaguchi. "Biological Rhythm Based Wearable Sleep State Observer." Journal of Advanced Computational Intelligence and Intelligent Informatics 11, no. 2 (February 20, 2007): 232–41. http://dx.doi.org/10.20965/jaciii.2007.p0232.

Повний текст джерела

Анотація:

This research aimed to observe human biological rhythm and adjust the human sleep wake pattern based on controlling wakeup timing using low stress system. An ordinary alarm clock operates according to preset time. Biological rhythm determines the human sleep cycle, which affects sleep depth and wakeup timing, which in turn resets the daily rhythm that affects human’s behavior, life-cycle pattern, life-style related disease. We developed a wearable biological rhythm based awakening controller (BRAC) that determines the biological rhythm in the sleep state (sleep cycle) and stimulates the user at a suitable time to enable the person to wakeup refreshed. The proposed system BRAC gauges human’s sleep quality and rhythms from peak to peak interval time of fingertip-pulse waves, that are measured more easily than polysomnography (PSG). In this paper, we detail the method of sleep cycle estimation using a wearable sensor device as the first feature of BRAC, then, in experiments, evaluate the performance of sleep cycle estimation based on a comparison of the BRAC-sleep cycle and the PSG-determined sleep stage.

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Дисертації з теми "Wakeup"

Lai, Shouwen. "Duty-Cycled Wireless Sensor Networks: Wakeup Scheduling, Routing, and Broadcasting." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/27333.

Повний текст джерела

Анотація:

In order to save energy consumption in idle states, low duty-cycled operation is widely used in Wireless Sensor Networks (WSNs), where each node periodically switches between sleeping mode and awake mode. Although efficient toward saving energy, duty-cycling causes many challenges, such as difficulty in neighbor discovery due to asynchronous wakeup/sleep scheduling, time-varying transmission latencies due to varying neighbor discovery latencies, and difficulty on multihop broadcasting due to non-simultaneous wakeup in neighborhood. This dissertation focuses on this problem space. Specifically, we focus on three co-related problems in duty-cycled WSNs: wakeup scheduling, routing and broadcasting. We propose an asynchronous quorum-based wakeup scheduling scheme, which optimizes heterogenous energy saving ratio and achieves bounded neighbor discovery latency, without requiring time synchronization. Our solution is based on quorum system design. We propose two designs: cyclic quorum system pair (cqs-pair) and grid quorum system pair (gqs-pair). We also present fast offline construction algorithms for such designs. Our analytical and experimental results show that cqs-pair and gqs-pair achieve better trade-off between the average discovery delay and energy consumption ratio. We also study asymmetric quorum-based wakeup scheduling for two-tiered network topologies for further improving energy efficiency. Heterogenous duty-cycling causes transmission latencies to be time-varying. Hence, the routing problem becomes more complex when the time domain must be considered for data delivery in duty-cycled WSNs. We formulate the routing problem as time-dependent Bellman-Ford problem, and use vector representation for time-varying link costs and end-to-end (E2E) distances. We present efficient algorithms for route construction and maintenance, which have bounded time and message complexities in the worst case by ameliorating with beta-synchronizer. Multihop broadcast is complex in duty-cycled WSNs due to non simultaneous wakeup in neighborhoods. We present Hybrid-cast, an asynchronous multihop broadcast protocol, which can be applied to low duty-cycling or quorum-based duty-cycling schedules, where nodes send out a beacon message at the beginning of wakeup slots. Hybrid-cast achieves better tradeoff between broadcast latency and broadcast count compared to previous broadcast solutions. It adopts opportunistic data delivery in order to reduce the broadcast latency. Meanwhile, it reduces redundant transmission via delivery deferring and online forwarder selection. We analytically establish the upper bound of broadcast count and the broadcast latency under Hybrid-cast. To verify the feasibility, effectiveness, and performance of our solutions for asynchronous wakeup scheduling, we developed a prototype implementation using Telosb and TinyOS 2.0 WSN platforms. We integrated our algorithms with the existing protocol stack in TinyOS, and compared them with the CSMA mechanism. Our implementation measurements illustrate the feasibility, performance trade-off, and effectiveness of the proposed solutions for low duty-cycled WSNs.
Ph. D.

Стилі APA, Harvard, Vancouver, ISO та ін.

Zhu, Yanmin. "Low-power event detection and wakeup scheduling in wireless sensor networks /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CSED%202007%20ZHU.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Kumar, Santosh. "Foundations of coverage for wireless sensor networks." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1154986262.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Shah, Devanshi. "St. Jude Medical: Enhanced MICS (eMICS)." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/377.

Повний текст джерела

Анотація:

Heart disease is one of the most prevalent diseases in the world. The survival chances for patients with ventricular fibrillation/ventricular tachycardia reduces significantly as time passes without treatment and even after getting timely treatment recurring episode are common. These patients can benefit from an Implantable Cardioverter Defibrillator (ICD) which can monitor heart rhythm and provide immediate treatment. Due to the ever changing physical conditions and disease progression, the ICD needs to collect diagnostic data as well as support programming by the physician. The ICD uses inductive telemetry and radio-frequency telemetry for the communication with the external devices such as a programmer or a monitor. Inductive telemetry uses less energy than RF telemetry but has a very short range of communication. In addition to inductive telemetry, the St. Jude Medical ICD supports 2.45 GHz band based asynchronized wakeup and 400 MHz MICS band based synchronized wakeup. The 2.45 GHz band based wakeup has limited wakeup range and the 400 MHz MICS based synchronized wakeup has limited availability for connection because it requires synchronization with the base station. The enhanced Medical Implant Communications Service (eMICS) algorithm is a firmware based algorithm which addresses the issues with other two wakeup schemes and provides fast, robust, and seamless wakeup. This thesis describes the design, implementation, and initial testing of eMICS algorithm on the Unity device platform in Technology Project Management (TPM) phase. The eMICS automated test tool developed at St. Jude Medical was used to test the eMICS algorithm under a controlled lab environment, typical home environment, typical hospital/clinic environment, and in the field. The project was successfully completed and transferred to Product Project Management (PPM) phase. However, the suggested duration of 60-90 seconds for sniff interval which will cause the least effect on the battery life was found unacceptable, and there is also a strong need for energy efficient hardware which draws minimal amount of current during each sniff. Therefore, St. Jude Medical is collaborating with the hardware vender to implement eMICS algorithm in the next version of hardware.

Стилі APA, Harvard, Vancouver, ISO та ін.

Bjernheim, Fina. "Livsmedelsäkerhet, hästnäringens wakeup-call? : Foder och livsmedeslproduktion i konkurrens om markresurser i Stockholms län- en framtidstudie med utgångspunkt i torkan 2018." Thesis, Stockholms universitet, Kulturgeografiska institutionen, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-185595.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Antilahy, Herimpitia Tsilavina Chrystelle. "Développement et mise en œuvre d’un mécanisme « 4D-addressing Wakeup radio » pour la réduction de la consommation d’énergie dans les réseaux de capteurs sans fil." Thesis, La Réunion, 2018. http://www.theses.fr/2018LARE0038.

Повний текст джерела

Анотація:

Les réseaux de capteurs sans fil qui conviennent pour vaste domaine d’applications, constituent une solution prometteuse qui répond à toute exigence de surveillance continue. L’autonomie énergétique des nœuds constitue un facteur de vulnérabilité qui influe directement leur longévité et la capacité du réseau à assurer longuement la couverture d’une zone géographique d’intérêt. La gestion de consommation énergétique représente la seule approche pour accroître la durée de vie de ces réseaux et leur conférer une autonomie raisonnable. Des solutions logicielles proposées à travers les protocoles MAC, apportent des améliorations significatives à la minimisation de la dépense énergétique des nœuds. Elles permettent de réduire les périodes d’écoute du canal qui, représente l’opération la plus coûteuse en termes d’énergie dans le fonctionnement des nœuds de capteurs sans fil. Néanmoins, se limiter à ces solutions n’est pas suffisant pour garantir une longévité acceptable. La seule méthode pour optimiser la conservation d’énergie dans les RCSFs est de mettre chaque nœud constamment en mode faible puissance et d’utiliser un mécanisme de télé-réveil à travers des signaux de réveil. Cela implique, l’utilisation de circuits de réveil de faible consommation qui assurent la surveillance de canal et qui déclenchent le réveil des nœuds uniquement à chaque fois qu’événement d’intérêt se produit. Dans ce contexte, une quantité importante de travaux ont proposés l’utilisation d’un mécanisme d’adressage (adresses MAC ou d’autres informations binaires), pour permettre aux nœuds non concernés de retourner rapidement dans son état de sommeil. Cette démarche est intéressante, mais implique toutefois une dépense énergétique non négligeable, liée à la réception et au traitement des informations d’adresse au niveau de tous les nœuds. La solution la plus efficace énergétiquement serait l’utilisation d’une autre forme d’adresse. Cette thèse s’inscrit dans le contexte de minimisation de la consommation énergétique des RCSFs par la mise en œuvre d’un adressage qui permet aux nœuds de recevoir et de traiter les signaux de réveil, sans allumer leur module de communication principal. Il s’agit pour nous de supprimer la dépense énergétique liée à l’allumage du module RF et à la réception de paquets d’adresse, en se tournant vers l’exploitation de la durée des signaux de réveils. Notre solution se repose sur les caractéristiques matérielles du microcontrôleur (IRQ, Timer/Counter) des nœuds de capteurs. Elle permet de réduire les complexités liées aux conditionnements des signaux de réveils. Notre solution est implémentée sur un réseau de petite taille. Elle est évaluée expérimentalement et ses performances énergétiques sont comparées à celles d’un schéma classique de télé-réveil sans mécanisme d’adressage et à celles d’un schéma classique basé sur le duty-cycling
Wireless sensor networks that are suitable for a wide range of applications, represent a promising solution that meets any requirement for continuous monitoring. The energy autonomy of sensor nodes constitutes a vulnerability factor that directly affects their longevity and the capacity of the network to ensure long coverage of the geographical area of interest. Energy consumption management is the only way to increase the lifespan of these networks and to give them a reasonable autonomy. Software solutions proposed through MAC protocols, bring significant improvements to the minimization of the energy expenditure of sensor nodes. They reduce the idle-listening periods which represents the most expensive operation in terms of energy, in the operation of the wireless sensor nodes. However, Focusing lonely on these solutions is not enough to guarantee acceptable longevity. The only way to optimize energy conservation in the WSN is to constantly put each node in low power mode and use a wakeup mechanism through wake-up signals. This involves the use of low-power wake-up circuits that provide channel monitoring, and trigger node wake-up only whenever event of interest occurs. In this context, a significant amount of work has proposed the use of an addressing mechanism (MAC addresses or other binary informations), to allow non-concerned nodes to quickly return to their sleep state. This approach is interesting, but involves a significant energy expenditure, related to address information’s reception and processing at all nodes. The most energy efficient solution would be the use of another type of address. This thesis is part of the context of minimizing the energy consumption of the WSN, using an addressing system that allows sensor nodes to receive and process the wake-up signals, without turning on their main communication module. It is to eliminate the energy expenditure related to the RF module’s activation and the reception of address packets, by exploiting wakeup signals duration. Our solution is based on the hardware characteristics of the microcontroller (IRQ, Timer/Counter) of sensor nodes. It reduces the complexities related to wakeup signals conditioning. Our solution is implemented on a small network. Its evaluations were done experimentally and its energy performance is compared to a conventional wake-up mechanism without addressing,and a conventional scheme based on duty-cycling

Стилі APA, Harvard, Vancouver, ISO та ін.

Yang, Fei. "Reliable and time-constrained communication in wireless sensor networks." Phd thesis, INSA de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00706211.

Повний текст джерела

Анотація:

Wireless Sensor Networks (WSNs) are composed of a large number of battery-powered sensor nodes that have the ability to sense the physical environment, compute the obtained information and communicate using the radio interfaces. Because sensor nodes are generally deployed on a large and wild area, they are powered by embedded battery. And it is difficult to change or recharge the battery, thus to reduce the energy consumption when sensors and protocols are designed is very important and can extend the lifetime of WSNs. So sensor nodes transmit packets with a lower transmission power (e.g. OdBm). With this transmission power, a packet can only be transmitted dozens of meters away. Therefore, when a sensor detects an event, a packet is sent in a multi-hop, ad-hoc manner (without fixed infrastructure and each sensor is able to relay the packet) to the sink (specific node which gathers information and reacts to the network situation). In this thesis, we first give an elaborate state of the art of WSNs. Then the impacts of duty-cycle and unreliable links or the performances of routing layer are analyzed. Based on the analytical results, we then propose three new simple yet effective methods to construct virtual coordinates under unreliable links in WSNs. By further taking the duty-cycle and real-time constraints into consideration we propose two cross-layer forwarding protocols which can have a greater delivery ratio and satisfy the deadline requirements. In order to have protocols for the WSNs that have dynamic topology, we then propose a robust forwarding protocol which can adapt its parameters when the topology changes. At last, we conclude this thesis and give some perspectives.

Стилі APA, Harvard, Vancouver, ISO та ін.

Cicatelli, Giancarlo. "Time warying wake flow characteristics behind turbine blade wakes." Doctoral thesis, Universite Libre de Bruxelles, 1998. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/212070.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Nilsson, Karl. "Numerical computations of wind turbine wakes and wake interaction." Doctoral thesis, KTH, Stabilitet, Transition, Kontroll, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166658.

Повний текст джерела

Анотація:

When wind turbines are placed in farms, wake effects reduce the overall power production. Also, turbine loads are significantly increased since turbulence levels are high within the wake flow. Therefore, when planning for a wind farm, it is imperative to have an understanding of the flow conditions in the farm in order to estimate the power losses and to optimize the durability of the turbines to be selected for the farm. The possibilities granted by numerical modeling and the development of computational capabilities give an opportunity to study these flow conditions in detail, which has been the key focus of this doctoral work. The actuator disc method is used for predicting the power production of the Lillgrund wind farm. The results of the simulations are compared to measurements from the actual wind farm, which are found to be in very good agreement. However, some uncertainties are identified in the modeling of the turbine. One of the uncertainties is that a generic rotor is used in the Lillgrund case. In order to quantify the errors resulting from this generalization three different rotor configurations are simulated in various flow conditions. Generally, it can be stated that the choice of rotor configuration is not crucial if the intention of the simulations is to compute the mean wake characteristics subject to turbulent inflow. Another uncertainty is that the turbines in the Lillgrund case were simulated without a power controller. Therefore, a power controller is implemented and used in simulations. Generally, the controller reduces the thrust of the turbines, reduces turbulence intensity and increases velocity levels in the wake flow. However, the use of a controller was observed to have a small impact on the power production. The effects of using the technique of imposing pregenerated turbulence and a prescribed boundary layer in the simulation are analyzed in order to verify its applicability in very long domains. It is observed that close to the plane of imposed turbulence, the conditions are mainly dependent on the imposed turbulence while far downstream the turbulence, regardless of its initial characteristics, is in near equilibrium with the prescribed wind shear. The actuator line method is validated using measurements of the near wake behind the MEXICO rotor. The analysis is performed by comparing position, size and circulation of the tip vortices, as well as velocity distributions in the wake flow. The simulations and measurements are generally found to be in good agreement apart from the tip vortex size, which is greatly overestimated in the simulations.

QC 20150519

Стилі APA, Harvard, Vancouver, ISO та ін.

Smith, David Andrew Robert. "Pertubation of vortex wakes for amelioration of the vortex wake hazard." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406670.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Книги з теми "Wakeup"

Lihusha, Lawrence Lorenzo. A wakeup call. [Lusaka]: Lawrence Lorenzo Lihusha, 2012.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Beaver, Frank Eugene. Oliver Stone: Wakeup cinema. New York: Twayne Publishers, 1994.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

The buffet syndrome: A wakeup call for America! Amarillo, Tex: Path Pub., 2007.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Sandy, Linter, and Waring Michael (Photographer), eds. Makeup wakeup: Revitalizing your look at any age. London: Apple, 2011.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Sandy, Linter, and Waring Michael photographer, eds. The makeup wakeup: Revitalizing your look at any age. Philadelphia: Running Press, 2011.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Bedria, Hamzi. A wakeup call to Muslim nations: A warning to the world. [Ormond Beach, Fla: H. Bedria, 1998.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Factors shaping clergy careers: A wakeup call for Protestant denominations and pastors. Durham, N.C: Duke Divinity School, 2005.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Dewdney, Anna. Llama Llama, wakey-wake. New York: Viking, 2012.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Wakey-wakey. [Boston]: Little, Brown, 1999.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Wakey-wakey. London: Bloomsbury, 1999.

Знайти повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Більше джерел

Частини книг з теми "Wakeup"

Tang, Devin C., and Nabil M. Elkassabany. "The Wakeup Call: 2AM Trauma." In A Case Approach to Perioperative Drug-Drug Interactions, 597–600. New York, NY: Springer New York, 2015. http://dx.doi.org/10.1007/978-1-4614-7495-1_132.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Jayanti, Prasad, and Sam Toueg. "Wakeup under read/write atomicity." In Distributed Algorithms, 277–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 1991. http://dx.doi.org/10.1007/3-540-54099-7_19.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Schurgers, Curt. "Wakeup Strategies in Wireless Sensor Networks." In Wireless Sensor Networks and Applications, 195–217. Boston, MA: Springer US, 2008. http://dx.doi.org/10.1007/978-0-387-49592-7_8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ramírez, Marco A., Adrian Cristal, Alexander V. Veidenbaum, Luis Villa, and Mateo Valero. "A Simple Low-Energy Instruction Wakeup Mechanism." In Lecture Notes in Computer Science, 99–112. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-39707-6_8.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

De Marco, Gianluca, Marco Pellegrini, and Giovanni Sburlati. "Faster Deterministic Wakeup in Multiple Access Channels." In Lecture Notes in Computer Science, 196–204. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11560586_16.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Cao, Jiannong, and Xuefeng Liu. "Enabling Network-Wide and Event-Triggered Wakeup." In SpringerBriefs in Electrical and Computer Engineering, 13–35. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-29034-8_3.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Krejcar, Ondrej, and Jakub Jirka. "Proactive User Adaptive Application for Pleasant Wakeup." In Intelligent Information and Database Systems, 472–81. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-20042-7_48.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Sharkey, Joseph J., and Dmitry V. Ponomarev. "Instruction Recirculation: Eliminating Counting Logic in Wakeup-Free Schedulers." In Euro-Par 2005 Parallel Processing, 550–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11549468_62.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Pak, Jinsuk, Jeongho Son, and Kijun Han. "A MAC Protocol Using Separate Wakeup Slots for Sensor Network." In Computational Science and Its Applications - ICCSA 2006, 1159–68. Berlin, Heidelberg: Springer Berlin Heidelberg, 2006. http://dx.doi.org/10.1007/11751588_123.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Lee, Sang Hoon, Yunmook Nah, and Lynn Choi. "Reactive Clock Synchronization for Wireless Sensor Networks with Asynchronous Wakeup Scheduling." In Software Technologies for Embedded and Ubiquitous Systems, 107–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-16256-5_12.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Тези доповідей конференцій з теми "Wakeup"

Zhu, Yanmin, and Lionel M. Ni. "Probabilistic wakeup." In the 10th ACM Symposium. New York, New York, USA: ACM Press, 2007. http://dx.doi.org/10.1145/1298126.1298188.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Fischer, M. J., S. Moran, R. Rudich, and G. Taubenfeld. "The wakeup problem." In the twenty-second annual ACM symposium. New York, New York, USA: ACM Press, 1990. http://dx.doi.org/10.1145/100216.100228.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Vivek, T. D., O. Sentieys, and S. Derrien. "Wakeup Time and Wakeup Energy Estimation in Power-Gated Logic Clusters." In 2011 24th International Conference on VLSI Design: concurrently with the 10th International Conference on Embedded Systems Design. IEEE, 2011. http://dx.doi.org/10.1109/vlsid.2011.18.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Huang, M., J. Renau, and J. Torrellas. "Energy-efficient hybrid wakeup logic." In Proceedings of the International Symposium on Low Power Electronics and Design. IEEE, 2002. http://dx.doi.org/10.1109/lpe.2002.146736.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Huang, Michael, Jose Renau, and Josep Torrellas. "Energy-efficient hybrid wakeup logic." In the 2002 international symposium. New York, New York, USA: ACM Press, 2002. http://dx.doi.org/10.1145/566408.566456.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Shi, Jianlei, and Brian Otis. "Wakeup receiver-aided communication terminals." In NAECON 2010 - IEEE National Aerospace and Electronics Conference. IEEE, 2010. http://dx.doi.org/10.1109/naecon.2010.5712964.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Hsiao, Kuo-su, and Chung-ho Chen. "Scheduler Optimization by Exploring Wakeup Locality." In 2006 International Conference on Computer Engineering and Systems. IEEE, 2006. http://dx.doi.org/10.1109/icces.2006.320434.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Keshavarzian, Abtin, Huang Lee, and Lakshmi Venkatraman. "Wakeup scheduling in wireless sensor networks." In the seventh ACM international symposium. New York, New York, USA: ACM Press, 2006. http://dx.doi.org/10.1145/1132905.1132941.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Zheng, Rong, Jennifer C. Hou, and Lui Sha. "Asynchronous wakeup for ad hoc networks." In the 4th ACM international symposium. New York, New York, USA: ACM Press, 2003. http://dx.doi.org/10.1145/778415.778420.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Reger, Robert W., Bryson Barney, Sean Yen, Michael Satches, Michael Wiwi, Andrew I. Young, Matthew A. Delaney, and Benjamin A. Griffin. "Near-zero power accelerometer wakeup system." In 2017 IEEE SENSORS. IEEE, 2017. http://dx.doi.org/10.1109/icsens.2017.8234277.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Звіти організацій з теми "Wakeup"

Bain, Rachel, Richard Styles, and Jared Lopes. Ship-induced waves at Tybee Island, Georgia. Engineer Research and Development Center (U.S.), December 2022. http://dx.doi.org/10.21079/11681/46140.

Повний текст джерела

Анотація:

Commercial vessels transiting the Savannah entrance channel intermittently generate large wake events at Tybee Island, Georgia, creating a potential hazard for beachgoers. However, not all commercial vessels generate large wakes, and the relationship between vessel dimensions, operating conditions, wake height, and drawdown magnitude is unclear. This study evaluates bathymetric data, high-frequency wave and vessel wake measurements, and broadcast vessel identification over a 4-month period with the goal of providing a quantitative characterization of vessel wake conditions at Tybee Island. Data from 1,386 cargo vessel passages and 202 tanker passages indicate that vessel dimensions (length and beam) are positively correlated with drawdown magnitude and secondary wake height, although large vessels do not consistently generate large wakes. Container ships, which tended to travel faster than tankers, corresponded to the largest wakes in the dataset. A further hypothesis is that tidally modulated energy dissipation may favor smaller vessel wake uprush at low tide and larger uprush at high tide, but this idea cannot be confirmed without additional measurements to quantify nonlinear wave propagation on the beach face. Based on the collected data, the study concludes with four recommendations for reducing risk to beachgoers.

Стилі APA, Harvard, Vancouver, ISO та ін.

Kelley, Christopher Lee, David Charles Maniaci, and Brian R. Resor. Wind Turbine Wakes. Office of Scientific and Technical Information (OSTI), October 2015. http://dx.doi.org/10.2172/1331504.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Burov, Alexey, and Timofey Zolkin. TMCI with Resonator Wakes. Office of Scientific and Technical Information (OSTI), June 2018. http://dx.doi.org/10.2172/1480111.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Spedding, Geoffrey R. Experiments in Developing Wakes. Fort Belvoir, VA: Defense Technical Information Center, April 2014. http://dx.doi.org/10.21236/ada619192.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ramsdell, J. V. Jr, and C. A. Simonen. Atmospheric relative concentrations in building wakes. Office of Scientific and Technical Information (OSTI), May 1997. http://dx.doi.org/10.2172/481848.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Jayne, Steven R. Observing the Evolution of Typhoon Wakes. Fort Belvoir, VA: Defense Technical Information Center, September 2009. http://dx.doi.org/10.21236/ada531982.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Jayne, Steven R. Observing the Evolution of Typhoon Wakes. Fort Belvoir, VA: Defense Technical Information Center, September 2010. http://dx.doi.org/10.21236/ada542476.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ramsdell, J. V. Jr, C. A. Simonen, and S. B. Smyth. Atmospheric relative concentrations in building wakes. Office of Scientific and Technical Information (OSTI), May 1995. http://dx.doi.org/10.2172/70706.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Blaskiewicz, Michael. Simple formula for surface roughness wakes. Office of Scientific and Technical Information (OSTI), July 2019. http://dx.doi.org/10.2172/1542781.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Jayne, Steven R. Observing the Evolution of Typhoon Wakes. Fort Belvoir, VA: Defense Technical Information Center, March 2012. http://dx.doi.org/10.21236/ada560220.

Повний текст джерела

Стилі APA, Harvard, Vancouver, ISO та ін.

Ми пропонуємо знижки на всі преміум-плани для авторів, чиї праці увійшли до тематичних добірок літератури. Зв'яжіться з нами, щоб отримати унікальний промокод!