Academic literature on the topic 'Phase selector'

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Journal articles on the topic "Phase selector":

1

Khojiakbar, E., I. Kh Kholiddinov, A. Eraliev, S. Tukhtasinov, and S. Komolddinov. "Development of simulation model of smart phase selector device." E3S Web of Conferences 461 (2023): 01051. http://dx.doi.org/10.1051/e3sconf/202346101051.

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In the quest for efficient and reliable power distribution systems, voltage asymmetry has emerged as a significant challenge. Voltage imbalances across different phases can lead to increased energy losses, compromised power quality, and reduced equipment lifespan. To address these issues, smart phase selector devices have gained attention as advanced electronic solutions for monitoring and managing voltage imbalances in low-voltage networks. This paper presents the development of a simulation model of a smart phase selector device using the Proteus software platform. Proteus offers a versatile environment for simulating electronic circuits and systems, making it an ideal choice for developing and evaluating the performance of the smart phase selector device. The primary objective of this research is to create a comprehensive simulation model that accurately represents the behavior and functionality of the smart phase selector device. Through a thorough literature review, the key principles and concepts underlying smart phase selector devices, voltage asymmetry, and related simulation techniques are explored. The developed simulation model incorporates the necessary circuit components, algorithms, and control mechanisms to faithfully simulate the operation of the smart phase selector device.
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Golovin, Nikolai N., and Alexander K. Dmitriev. "Pulse selector for obtaining femtosecond radiation with a controlled carrier-envelope phase." Analysis and data processing systems, no. 2 (June 28, 2022): 121–32. http://dx.doi.org/10.17212/2782-2001-2022-2-121-132.

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In non-linear optical processes, such as obtaining attosecond pulses, it is extremely important to control the carrier envelope phase. To do this, various periodic trains of identical femtosecond pulses with a controlled phase can be created. In addition, since there is no frequency comb offset in such sequences, the process of measuring optical frequencies is greatly simplified. The pulse selector has been developed to obtain a sequence of identical femtosecond pulses with a controlled carrier – envelope phase. The selector makes it possible to obtain a “pure” sequence of identical femtosecond pulses at the modulator output (when every 125th pulse is selected from the original sequence with a repetition rate of 250 MHz) in a fairly wide range of control signal phase tuning. This range is 1.3 degrees. The phase tuning of the pulse selector provides the possibility of obtaining one hundred twenty-five such sequences with a phase tuning discreteness of 2π/125. The simplest way to reduce discreteness is to increase the ratio of the pulse repetition rate of a femtosecond laser to the shift of its frequency comb. The phase characteristic of the pulse selector was obtained by registering the time dependence of the synthesized sequence with a selector phase tuning step of 0.1 degrees. We measured the spectra of the sequences at different phases of the pulse selector, as well as the emission spectrum of the master laser at the minimum transmission of the modulator in the absence of modulation. The spectrum with the maximum amplitude corresponded to the case when identical pulses with the highest amplitude were selected from the original sequence. The difference between these spectra made it possible to isolate the spectrum of a pure sequence of identical femtosecond pulses without taking into account the "background" that occurs due to the modulator has a finite attenuation of –20 dB.
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Chandan Singh, Ashish Kumar Gupta,. "Automatic Cost Effective Phase Selector." International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering 04, no. 05 (May 20, 2015): 3920–25. http://dx.doi.org/10.15662/ijareeie.2015.0405019.

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Kumaraswamy, K., L. Ashok, N. Pooja, and B. Akshith. "AUTOMATIC ACTIVE PHASE SELECTOR FOR SINGLE PHASE LOAD FROM THREE PHASE SUPPLY." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 10, no. 3 (December 13, 2019): 1221–25. http://dx.doi.org/10.61841/turcomat.v10i3.14465.

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Phase absence is a very common and severe problem in any industry, home or office. Many times one or two phases may not be live in three phase supply. Because of this, many times, some electrical appliances will be on in one room and OFF in another room. This creates a big disturbance to our routine work.This project is designed to check the availability of any live phase, and the load will be connected to the particular live phase only. Even a single phase is available, and then also, the load will be in ON condition.This project is designed with Arduino MCU. This controller continuously checks for live condition of all phases connected to it, and the controller connects the load to the active phase using a Relay. This relay is driven with a transistor. If two or three phases are live, the load will be connected to phase I only. An LCD is provided to display the status of the phase condition. Contrast control preset is given for LCD contrast control. This project uses regulated 12V, 500mA power supply. 7805 three terminal voltage regulator is used for voltage regulation. Bridge type full wave rectifier is used to rectify the ac out put of secondary of 230/12V step down transformer.
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Yuan, Zhao Qiang, Xiao Ting Yu, and Yin Mu Liu. "Research on a New Fault Phase Selector of Protective Relay for Double Circuit Lines on same Tower." Applied Mechanics and Materials 325-326 (June 2013): 446–51. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.446.

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Aiming at the misoperation of the conventional phase selector by phase current-difference during some cross country faults, a fault phase selector is developed. Based on the fault lines of the corresponding fault phase are selected, a novel synthesis fault phase selector using voltages and currents in single circuit at single side is proposed, which is based on comparing the difference of fault voltages to make sure all the fault phase in the lines and judging the phase degree and amplitude condition of the fault currents. Used this scheme and the phase current difference, the fault phase may be picked up correctly in double circuit lines on the same tower, especially in cross country faults.
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Zeng, Xiao Hui, Yong Hui Chen, and Gong Quan Tan. "A Fault Phase Selection Method Based on Arc Voltages for High-Voltage Line Protections in Electric Power Systems." Advanced Materials Research 676 (March 2013): 218–21. http://dx.doi.org/10.4028/www.scientific.net/amr.676.218.

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A fault phase selection method is proposed based on arc voltage after analysis of inadequate of fault phase selector existed in the paper. A precise fault phase selection can be achieved by using arc voltages in conjunction with phase current differences and sequence components of currents. The method proposed can solve false tripping problems in transmission line protections when single phase to ground faults occur with great reliabilities. Simulation results show that the method can identify faulted phase or phases correctly and effectively.
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Adesina, Lambe Mutalub, Olalekan Ogunbiyi, and Bilkisu Jimada-Ojuolape. "Development of an Automatic Phase Selector for Nigerian Power Utility Customers." ABUAD Journal of Engineering Research and Development (AJERD) 7, no. 2 (July 1, 2024): 16–26. http://dx.doi.org/10.53982/ajerd.2024.0702.02-j.

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Power utility customers in a developing country like Nigeria have constituted a habit of changing the electricity supply line from an unavailable or unstable phase to the most available or stable phase. The category of customers involved in this character are those on single phase power supply. However, this act is being carried out manually at the meter point using the cut-out fuses. This attitude results in phase unbalances, overheating electrical equipment including feeder pillars, transformer coils, network faults, and overall system instability. Thus, this paper presents the development of an Automatic Phase Selector for Nigerian Power Utility Customers. The device automatically selects an available phase from the three-phase power supply lines. The research comprises designing an automatic phase selector circuit, simulation of the designed circuit, programming code development in C- Language for the microcontroller, construction of the designed circuit, and carrying out tests on completed work done to ascertain the effectiveness of the developed system. The system operation involved a three-phase supply from the closest distribution network of the power utility company which is connected to a three-in-one gang switch while the switching ON and OFF of their static switches represent phase-off in an ideal situation. The operational results of this system are presented in the form of the truth table which indicates that the affected customer would not have a power supply only when the 3-phases are under voltage or overvoltage or unavailable. This implies that one of the three phases that meet the three criteria would be switched ON. A pure sine wave was used as input into the Optocoupler and the output waveform of the rectified pulsating signal is separately displayed. This output waveform is very clean and noiseless. Finally, the system when practically tested with an unbalanced three-phase supply, worked perfectly enhancing the flexibility of operating an Automatic Phase selector and hence avoiding manual switching of the phase selector which has been attributed to changing of cut-out fuses and associated stress as well as having a user-friendly phase selector.
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Tian, Shu, and Fang Fang Liu. "An Integrated Fault Phase Selection Scheme for Double Circuit Lines on the Same Tower." Applied Mechanics and Materials 668-669 (October 2014): 657–60. http://dx.doi.org/10.4028/www.scientific.net/amm.668-669.657.

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For double circuit lines on the same tower, traditional phase selectors for single lines can not operate correctly in crossing-line faults. To ensure the performance of faults phase selection in the single lines and meanwhile achieve accurate phase selection in crossing-line faults, an integrated fault phase selection scheme based on fault component current is proposed. Firstly, faults are divided into single lines faults, same-name-phase crossing-line faults and non same-name-phase crossing-line faults, then the phase selection is classified. The process with adaptive capacity can automatically select the suitable phase selector not affected by fault types. Simulation results via PSCAD/EMTDC show that the phase selection scheme based on fault component current has good performances for different fault types, fault location and transition resistance.
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OWOJORI, ADEDOTUN O., ABIODUN M. AKINBOLADE, and KAYODE F. AKINGBADE. "DESIGN ANALYSIS OF AN AUTOMATIC PHASE SELECTOR." Journal of Engineering Studies and Research 27, no. 3 (January 10, 2022): 51–63. http://dx.doi.org/10.29081/jesr.v27i3.288.

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Power instability in Nigeria caused by overbearing demand of power by consumers and lack of proper maintenance of the power system devices among others has brought about the need for alternative power sources such as generators, solar, typical inverters and other alternative supplies which requires one form of switching or the other to achieve phase selection during power failure. This paper gives a design analysis of an automatic phase selector linking available power supplies, that is; switching between a three-phase public utility supply, as a result of total power outage in the public supply to an alternative secondary supply (in this case a Generator and an Inverter system) and back when power is restored. The design adopts the use of a microcontroller-based system interconnected with other hardware components for proper isolation, switching and visualization of switching conditions. The system design is divided into two major part: the hardware which consists of the power supply, sensing circuit, controller or control logic circuit, display and the power electronics switching unit and the software instruction code on the microcontroller unit. The design analysis was first carried out accompanied with computer simulation on a software tool (Proteus 8 Professional, version 8.4) to carry out performance evaluation of the sub-circuits, thereafter, a practical implementation of the design was carried out and tested with the utility power supply using five (5) switches, three of which represents the three-phase primary supply and the other two represents the secondary supply.
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Yang, Y., N. L. Tai, and W. Y. Yu. "ART artificial neural networks based adaptive phase selector." Electric Power Systems Research 76, no. 1-3 (September 2005): 115–20. http://dx.doi.org/10.1016/j.epsr.2005.05.006.

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Dissertations / Theses on the topic "Phase selector":

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Muhammad, Nuraddeen Ado. "Analysis and design of an innovative 19.5 GHz active phase-shifter architecture, implemented in a 0.13 μm BiCMOS SiGe process, for beamforming in 5G applications." Electronic Thesis or Diss., Poitiers, 2024. http://www.theses.fr/2024POIT2257.

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Pour différentes raisons, la 5G domine actuellement l'actualité technologique. Les capacités de la 5G en termes de largeur de bande et de temps réel constitues un énorme potentiel sociétal en permettant pléthore d'applications nouvelles et inattendues. En effet, la bande de fréquence des ondes millimétriques se caractérise par une largeur de bande disponible qui peut prendre en charge des systèmes sans fil à haut débit pour les futurs systèmes de radiocommunication, y compris les systèmes cellulaires de cinquième génération et au-delà. Les fréquences d'exploitation des ondes millimétriques nécessitent généralement une plus grande ouverture d'antenne pour améliorer le bilan de liaison. Ces antennes se présentent généralement sous la forme de réseaux phasés, permettant la formation de faisceaux. Dans ce contexte, ce travail présente la conception et la mise en œuvre d'un déphaseur actif à 19,5 GHz pour la formation de faisceaux. Le circuit proposé est basé sur une architecture originale utilisant un oscillateur commandé en tension verrouillé par injection (ILVCO en Anglais) associé à un filtre polyphase suivi d'un circuit de sélection de phase et de son signe. La phase souhaitée dans la plage de ± 45° est synthétisée avec le circuit proposé en modifiant la tension de commande Vcntr de l’ILVCO pour un réglage fin et en modifiant les deux signaux de commandes du sélecteur de phase et de signe (S0, S2) pour un réglage grossier, ce qui engendre une variation de phase linéaire de 360°. D'après les résultats de la simulation post-layout, la plage de réglage de la fréquence d’oscillation libre du VCO varie de 17,89 GHz à 20,16 GHz. En outre, avec une puissance injectée de -8,5 dBm et une fréquence de 19,5 GHz, le déphaseur proposé consomme 20,47 mA sous une tension d'alimentation de 1,3 V. De plus, la puissance de sortie moyenne sur 50 Ω est de -15,58 dBm. Le circuit complet a une taille de 1,58 mm2, y compris les pads, et il est intégré sur un process BiCMOS SiGe:C 0,13 μm. Enfin, les résultats obtenus montrent que le déphaseur actif proposé s’avère un candidat potentiel pour les systèmes à réseau phasé utilisés pour la formation de faisceaux dans les applications 5G
For good reasons, 5G dominates technological news. The high-bandwidth and real-time capabilities of 5G have huge societal potential by enabling a plethora of new and unanticipated application cases. Indeed, the millimeter-wave frequency band is characterized by an available bandwidth that can support high-speed wireless systems for future radio communications systems, including 5th Generation cellular systems and beyond. The frequencies of operation at mm-wave generally requires larger antenna aperture to improve the channel budget at useful distances. These antennas are usually in the form of phased arrays, allowing beamforming to be performed. This work presents the design and implementation of a 19.5 GHz active phase shifter for beamforming in 5G applications. The proposed circuit is based on an original architecture using an injection-locked voltage-controlled oscillator (ILVCO) associated with a polyphase filter followed by a phase selection circuit and its sign. The desired phase in the range of ± 45° is synthesised with the proposed circuit by altering the control voltage Vcntr of an ILVCO for fine-tuning and modifying the two control signals of phase and sign selectors (S0, S2) for coarse tuning, resulting in a 360° linear phase variation. According to the post-layout simulation results, the frequency tuning range of the VCO varies from 17.89 GHz to 20.16 GHz in free-running mode. In addition, with an injected power of -8.5 dBm and a frequency of 19.5 GHz, the proposed phase shifter draws 20.47 mA from a 1.3 V supply voltage. Furthermore, the mean output power on 50 Ω load is found to be -15.58 dBm. The whole circuit has a chip size of 1.58 mm2 including the pads and it is integrated in a BiCMOS SiGe:C 0.13 μm process. Finally, the obtained results justify that the proposed active phase shifter is a relevant design for phased-array systems used for beamforming in 5G applications
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Gasquez, Julien. "Conception de véhicules de tests pour l’étude de mémoires non-volatiles émergentes embarquées." Electronic Thesis or Diss., Aix-Marseille, 2022. http://www.theses.fr/2022AIXM0419.

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La mémoire à changement de phase (PCM) s’inscrit dans la stratégie de développement de mémoires non-volatiles embarquées sur les nœuds technologiques avancés (sub 28nm). En effet, la mémoire Flash-NOR devient de plus en plus onéreuse à intégrer dans les technologies avec des diélectriques à forte permittivité et des grilles métalliques. Cette thèse a donc pour objectif principal de réaliser des véhicules de tests afin d’étudier un point mémoire novateur PCM + OTS et de proposer des solutions afin de combler ses lacunes et ses limites suivant les applications envisagées. L’étude a pour support deux technologies différentes le HCMOS9A et le P28FDSOI. La première sert de support pour le développement d’un véhicule de validation technologique du point mémoire OTS+PCM. La deuxième est, quant à elle, utilisée pour démontrer la surface obtenu avec un dimensionnement agressif du point mémoire. Enfin, un circuit de lecture optimisé pour ce point mémoire a été réalisé permettant la compensation des courants de fuites ainsi que la régulation des tensions de polarisations de la matrice au cours de la lecture
Phase change memory (PCM) is part of the strategy to develop non-volatiles memories embedded in advanced technology nodes (sub 28nm). Indeed, Flash-NOR memory is becoming more and more expensive to integrate in technologies with high permittivity dielectrics and metallic gates. The main objective of this thesis is therefore to realize tests vehicles in order to study an innovative PCM + OTS memory point and to propose solutions to fill its gaps and limitations according to the envisaged applications. The study is based on two different technologies: HCMOS9A and P28FDSOI. The first one is used as support for the development of a technological validation vehicle of the OTS+PCM memory point. The second one is used to demonstrate the surface obtained with an aggressive sizing of the memory point. Finally, an optimized readout circuit for this memory point has been realized allowing the compensation of leakage currents as well as the regulation of the bias voltages of the matrix during the reading
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Hiles, James F. "Multi-phase source selection strategy analysis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2000. http://handle.dtic.mil/100.2/ADA386722.

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Thesis (M.S. in Management) Naval Postgraduate School, Dec. 2000.
"December 2000." Thesis advisor(s): Jeffrey Cuskey, Keith Snider. Includes bibliographical references (p. 111-114). Also available online.
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Colarusso, Pina. "Selected projects in gas-phase spectroscopy." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq22196.pdf.

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Spalek, Leszek Jedrzej. "Emergent phenomena near selected phase transitions." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.608135.

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Meredith, Michael William. "Intermetallic phase selection in dilute aluminium alloys." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624389.

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Hara, Kousuke. "Mechanism of Phase Selection during Mechanical Milling." Kyoto University, 2011. http://hdl.handle.net/2433/142019.

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Yeago, Taylor Craig. "A Two-Phase Buck Converter with Optimum Phase Selection for Low Power Applications." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51230.

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Power consumption of smart cameras varies significantly between sleep mode and active mode, and a smart camera operates in sleep mode for 80 — 90% of time for typical use. To prolong the battery life of smart cameras, it is essential to increase the power converter efficiency for light load, while being able to manage heavy load. The power stage of traditional buck converter is optimized for maximum load, at the cost of light-load efficiency. Wei proposed a multiphase buck converter incorporating the baby-buck concept and optimum number of phases (ONP) control. This thesis research investigated Wei's multiphase buck converter to improve the light-load efficiency for smart cameras as the target application. The proposed two-phase buck converter aims to provide power for microprocessors of smart cameras. The input voltage of the converter is 5 V DC, and the output voltage is 1.2 V DC with power dissipation range of 25 mA (30 mW) for light load and 833 mA (1 W) for heavy load. Three methods are considered to improve light-load efficiency: adopting baby-buck concept, adapting ONP control for low-power range, and implementing a pulse frequency modulation (PFM) control scheme with discontinuous conduction mode (DCM) to lower switching frequency. The first method is to adopt the baby-buck concept through power stage design of each phase to optimize efficiency for a specific load range. The baby-buck phase is optimized for light load and the heavy-load phase is designed to handle the processors maximum power consumption. The second method performs phase selection from sensed load current information. Rather than have all phases active for heavy-load as in ONP control, optimum phase selection (OPS) control is introduced to adaptively select between phases based on load current. Due to low-power constraints, OPS is more efficient for the medium to heavy-load range. The transition between phases due to load change is also investigated. The third and final method implements PFM control with DCM to lower switching frequency and reduce switching and driving losses under light load. PFM is accomplished with a constant on-time (COT) valley current mode controller, which uses the inductor current information and output voltage to generate switching signals for both the top and bottom switches. The baby-buck phase enters DCM to lower switching frequency under very light load, while the heavy-load phase remains in continuous conduction mode (CCM) throughout its load range. The proposed two-phase buck converter is designed and prototyped using discrete components. Efficiency of the two-phase converter and a power loss breakdown for each block in the control scheme were measured. The efficiency ranges from 64% to 81% for light load ranging of 30 mW to 200 mW, and the efficiency ranges from 81% to 88% for heavy load ranging from 200 mW to 1 W. The majority loss is due to controllers, which are responsible for 37 % (8.6 mW) for light load of 60 mW and for 10.9 % (9 mW) for heavy load of 600 mW. The gate driver loss is considerable for heavy load of 600 mW, consuming 11.9% (9.8mW). The converter has a 10 mV overshoot voltage for a load step-down from 225 mA to 25 mA, and it has 65 mV overshoot voltage for a load step-up from 25 mA to 225 mA. Although, a fair comparison is difficult due to use of discrete parts for OPS control, the proposed converter shows reasonably good efficiency and performance.
Master of Science
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Sha, Gang. "Intermetallic phase selection in 6xxx series A1 alloys." Thesis, University of Oxford, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393371.

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Allen, C. M. "Nucleation studies in aluminium alloys." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388896.

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Books on the topic "Phase selector":

1

Hiles, James F. Multi-phase source selection strategy analysis. Monterey, Calif: Naval Postgraduate School, 2000.

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Goldberg, Yuri. Phase transfer catalysis: Selected problems and applications. Yverdon, Switzerland: Gordon and Breach Science Publishers, 1992.

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Filipe, João Alberto Nogueira. Dynamics of phase ordering in selected systems. Manchester: University of Manchester, 1994.

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Corporation, Ontario Waste Management. Site selection process: Phase 4A : selection of a preferred site(s) : site selection. Toronto: M.M. Dillon, 1986.

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Corporation, Ontario Waste Management. Site selection process - phase 4A - selection of a preferred site(s), engineering. Toronto: Ontario Waste Management Corp., 1986.

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Corporation, Ontario Waste Management. Site selection process: Phase 4A: selection of a preferred site : land use. [Toronto]: Ontario Waste Management Corporation, 1985.

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Corporation, Ontario Waste Management. Site selection process: Phase 4A: selection of a preferred site(s) : transportation. [Toronto, Ont.]: Ontario Waste Management Corporation, 1985.

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Corporation, Ontario Waste Management. Site selection process: Phase 4A: selection of a preferred site(s) : surface water. [Toronto]: Ontario Waste Management Corporation, 1985.

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Corporation, Ontario Waste Management. Site selection process: Phase 4A: selection of a preferred site(s) : atmospheric considerations. [Toronto]: Ontario Waste Management Corporation, 1985.

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Corporation, Ontario Waste Management. Site selection process: Phase 4A: selection of a preferred site(s) : social analysis. [Toronto]: Ontario Waste Management Corporation, 1985.

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Book chapters on the topic "Phase selector":

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Weik, Martin H. "selector phase." In Computer Science and Communications Dictionary, 1541. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_16886.

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Viet, La Duc, Nguyen Van Hai, and Nguyen Tuan Ngoc. "Reduce Phase-Lead Effect in an Active Velocity Feedback by Frequency Range Selector." In Advances in Asian Mechanism and Machine Science, 610–16. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-91892-7_58.

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Schmidt, Thomas. "Selection Phase." In Praxisleitfaden Management Reporting, 3–19. Wiesbaden: Springer Fachmedien Wiesbaden, 2016. http://dx.doi.org/10.1007/978-3-658-11565-4_2.

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Chae, Young Kwang, Timothy J. Taxter, Ludimila L. Cavalcante, and Francis J. Giles. "Immunotherapeutic Biomarkers and Selection Strategies." In Early Phase Cancer Immunotherapy, 69–114. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63757-0_3.

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van Pieterson, Liesbeth. "Experimental Methods for Material Selection in Phase-change Recording." In Phase Change Materials, 81–98. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-84874-7_5.

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Borelli, Jessica L. "Phase 1: Memory selection." In Relational savoring: Using guided reflection to strengthen relationships and improve outcomes in therapy., 77–104. Washington: American Psychological Association, 2024. http://dx.doi.org/10.1037/0000372-004.

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İbrahimoğlu, Beycan, and Beycan İbrahimoğlu. "Material Selection." In Critical States at Phase Transitions of Pure Substances, 39–47. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-09966-3_4.

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Scott, Peter J. H. "Linker Selection Tables." In Linker Strategies in Solid-Phase Organic Synthesis, 589–655. Chichester, UK: John Wiley & Sons, Ltd, 2009. http://dx.doi.org/10.1002/9780470749043.ch23.

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Merz, J. "Selected Fluid Phenomena in Water/Steam." In Two-Phase Flow Heat Exchangers, 619–29. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2790-2_19.

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Maleque, Md Abdul, and Mohd Sapuan Salit. "Design Phases." In Materials Selection and Design, 39–55. Singapore: Springer Singapore, 2013. http://dx.doi.org/10.1007/978-981-4560-38-2_3.

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Conference papers on the topic "Phase selector":

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Lu, Wen-jun, Xiang-ning Lin, and Gao Yan. "A novel adaptive phase selector based on fault component." In 2011 International Conference on Electric Information and Control Engineering (ICEICE). IEEE, 2011. http://dx.doi.org/10.1109/iceice.2011.5777742.

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Hadj-Mihoub-Sidi-Moussa, H., Smail Tedjini, and Rachida Touhami. "Phase selector for RFID localization system based on RSSI filter." In 2019 14th International Conference on Design & Technology of Integrated Systems In Nanoscale Era (DTIS). IEEE, 2019. http://dx.doi.org/10.1109/dtis.2019.8735016.

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Li, Wei, Tian-shu Bi, and Qi-xun Yang. "Study on sequence component based fault phase selector during power swings." In 2010 5th International Conference on Critical Infrastructure (CRIS). IEEE, 2010. http://dx.doi.org/10.1109/cris.2010.5617576.

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Huang, Tao, and Yuping Lu. "Improved superimposed current phase selector of wind farm with crowbar system." In 2014 IEEE Power & Energy Society General Meeting. IEEE, 2014. http://dx.doi.org/10.1109/pesgm.2014.6939217.

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Fu, Yupeng, Lianming Li, and Dongming Wang. "A Fractional-N Divider for Phase-Locked Loop with Delta-Sigma Modulator and Phase-Lag Selector." In 2018 IEEE International Symposium on Radio-Frequency Integration Technology (RFIT). IEEE, 2018. http://dx.doi.org/10.1109/rfit.2018.8524055.

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Sarode, Dipali, Arti Wadhekar, and Rajesh Autee. "Voltage source inverter with three phase preventer and selector for industrial application." In 2015 International Conference on Pervasive Computing (ICPC). IEEE, 2015. http://dx.doi.org/10.1109/pervasive.2015.7087046.

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Lu, Z., W. H. Tang, T. Y. Ji, L. Jiang, and Q. H. Wu. "A phase selector based on mathematical morphology for double circuit transmission lines." In 2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies. IEEE, 2008. http://dx.doi.org/10.1109/drpt.2008.4523799.

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Du, Yong, and GuoPing Zhang. "Photonic Data Selector Based on Cross-Phase Modulation in a Highly Nonlinear Fiber." In 2012 Symposium on Photonics and Optoelectronics (SOPO 2012). IEEE, 2012. http://dx.doi.org/10.1109/sopo.2012.6271038.

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Lindenau, B. "X-Ray Pulse Selector With 2 ns Lock-in Phase Setting And Stability." In SYNCHROTRON RADIATION INSTRUMENTATION: Eighth International Conference on Synchrotron Radiation Instrumentation. AIP, 2004. http://dx.doi.org/10.1063/1.1757970.

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Xie, Y., X. Zheng, C. Lan, H. Zhang, C. Chao, and N. Tai. "High-frequency fault voltage-based phase selector for photovoltaic power plant outgoing lines." In 12th International Conference on Renewable Power Generation (RPG 2023). Institution of Engineering and Technology, 2023. http://dx.doi.org/10.1049/icp.2023.2331.

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Reports on the topic "Phase selector":

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Fanick, Dietzmann, and Urban. L51564 Emissions Data for Engines Used by the Gas Pipeline Transmission Industry. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 1988. http://dx.doi.org/10.55274/r0010937.

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Abstract:
Final Report; covers the annual phases of a two-phase effort to expand the data collected in the companion document (Compilation, L51565). Each annual section is approximately 100 pages and describes the test procedure and selection criteria for the 22 engines and 6 turbines added by the project.
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Silva, Martha, Nrupa Jani, Adetunji Adetayo, and Mayokun Adediran. Qualitative evaluation of Breakthrough ACTION/Nigeria’s community capacity strengthening approach to sustaining integrated social and behavior change programming: Phase I. Population Council, 2022. http://dx.doi.org/10.31899/sbsr2022.1024.

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To ensure the maintenance and sustainability of social and behavior change (SBC), Breakthrough ACTION/Nigeria is implementing a phased, performance-based community capacity strengthening (CCS) approach that focuses on engaging existing community leaders and structures—namely ward development committees—to increase community self-efficacy, coordinate and support the health ecosystem in general, and to ensure sustained community-level activities supporting behavior change and positive social norms for improved health outcomes. Using a qualitative approach, Breakthrough RESEARCH assessed early successes, challenges, and opportunities for Breakthrough ACTION/Nigeria’s CCS Phase 1 approach in selected wards of the Bauchi and Sokoto states in Nigeria.
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Alexander and Kiefner. L51554 Field Observations on the Two-Phase Hovenweep CO2 Gathering System During Summer Operation. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), January 1988. http://dx.doi.org/10.55274/r0010290.

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While laboratory-scale studies of single-phase flow have resulted in good correlations for the design of large-diameter pipeline systems, similar approaches for two-phase flow have not been as useful. Although theoretical modeling and simulation of single-phase turbulent flow has not yet been accomplished, empirical observation of many small-scale examples has lead to effective correlations through dimensional analysis. These correlations for a single-phase often do scale-up adequately for design of pipelines. However, when an additional phase is present, this approach has not worked well. It is likely that a better understanding of the fundamental interaction of two-turbulent phases will be necessary if small-scale studies are to be used for the design of large, high-pressure pipeline systems. A more immediate way of gaining some knowledge of two-phase flow in large diameter pipes of the complexity present in the field is to over-design a pipeline system and construct it, field tune it to specifications, then observe its behavior. This is obviously a risky and expensive approach. However, many such systems have been constructed. It is on these successful two-phase pipeline systems that our attention should be focused in the immediate future if we are to improve two-phase pipeline design now of new but similar systems. Such is the focus of this study of the Hovenweep CO2 Gathering System. The Hovenweep CO2 Gathering System was selected for study as a pipeline system that could add to the knowledge of the nature of steady-state two-phase flow in large diameter high pressure pipeline systems with hilly terrain. Characterization includes measurement of the following variables: 1. gas and liquid flow rates; 2. typical gas and liquid compositions; 3. liquid volume fractions; 4. pressure drop across each test segment; 5. temperature.
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Weeks, Timothy "Dash." DTPH56-13-X-000013 Modern High-Toughness Steels for Fracture Propagation and Arrest Assessment-Phase II. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), September 2018. http://dx.doi.org/10.55274/r0012037.

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NIST work developed processes to identify the stress/strain/crack velocity conditions for unstable high-rate ductile crack propagation found in a full-scale pipeline burst test and duplicate those conditions in a medium-scale test. With modeling to validate conditions and assumptions used in reducing the scale of the tests. A medium-scale test to elucidate material property data necessary to qualify high-strength high-toughness steels based on the correlation to large-scale tests. Parametric determination of the material properties governing fracture propagation or arrest-ability was developed. This will assist researchers to determine a relevant and effective small-scale test (or tests) that provides enough information for material selection, design, reliability, as well as integrity and risk assessment. Pipe evaluated includes API5L X70 and X80 pipe. The strain was measured by a three-dimensional digital image correlation system. This project takes a phased approach with complementary research in successive phases beginning with a road map to systematically fill gaps in knowledge and understanding of the problem of unstable high-rate ductile running failures in pipelines. This report is structured to highlight the problem statement with respect to the current state of the art understanding, define knowledge gaps and present the plan, and progress toward meeting the objective. The following sections specifically cover the effort to develop and inform a constitutive material model necessary for the structural model of the medium-scale test. The material testing required to inform the constitutive material model is presented. Conclusions of this phase of the project are also presented in addition to the proposed work in Phase III of the project.
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Akbari, Chirag, Ninad Gore, and Srinivas Pulugurtha. Understanding the Effect of Pervasive Events on Vehicle Travel Time Patterns. Mineta Transportation Institute, December 2023. http://dx.doi.org/10.31979/mti.2023.2319.

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The COVID-19 pandemic has disrupted daily activities and travel patterns, affecting personal and commercial trips. This study investigates the effect of different stages of the pandemic on travel time patterns. Eighty-six geographically distributed links (sections of road) in Mecklenburg County and Buncombe County, North Carolina, were selected for analysis. The selected links accounted for the variation in road geometry, land use, and speed limit. Travel time data for three years (i.e., 2019, 2020, and 2021) were extracted from a private data source at 5-min intervals. Travel time reliability (TTR) and travel time variability (TTV) are estimated for different phases of the pandemic and compared to analyze the effect of COVID-19 on TTR and TTV. The seasonal arithmetic integrated moving average (SARIMA) model was developed to investigate the effect of COVID-19 on average daily travel time patterns. Unreliable and uncertain travel times were observed on lower speed limit links during the off-peak hours while reliable and certain travel times were observed during morning and evening peak hours of the COVID-19 pandemic. This highlights that the COVID-19 pandemic significantly affected the scheduling of trips. For higher speed limits, travel times were reliable and certain during off-peak and peak hours. Among the different phases of COVID-19, significant improvement in TTR and TTV was observed during Phase II, which could be attributed to stay-at-home directives. Trucks followed a similar pattern as passenger cars. Post-COVID-19, i.e., for 2021, travel times were reliable and certain for most links during the morning peak hours. The SARIMA model revealed a significant effect of COVID-19 on average daily travel time patterns. Stable travel time patterns were noted during Phase II of COVID-19. Moreover, a maximum reduction in travel time was observed during Phase II of the COVID-19 pandemic. The findings emphasize the influence of government norms and regulations on travel time patterns during pervasive events such as COVID-19.
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Holibaugh, Robert, J. M. Perry, and L. A. Sun. Testbed Description: Requirements and Selection Guidelines. Phase 1. Fort Belvoir, VA: Defense Technical Information Center, September 1988. http://dx.doi.org/10.21236/ada223895.

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Kwun, H. L51694 Investigation of Techniques for Bulk Stress Measurement on Exposed Pipelines-Phases I and II. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), October 1993. http://dx.doi.org/10.55274/r0010318.

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Differential movement of a buried pipeline resulting from terrain instabilities such as subsidence, fault slippage, frost heave, ice scouring, soil movement, and landslide can create localized areas of high stress in a pipeline. These areas may be susceptible to mechanical failure and therefore may compromise the structural integrity of the line. Nondestructive testing (NDT) methods that can detect high-stress regions and measure the magnitude of the stress in the pipeline are needed to determine if or when remedial action must be taken to prevent stress-related damage. The areas of high stress can compromise the integrity of the pipeline, despite the fact that the highly stressed areas may not be readily detectable. �This report describes two phases of development for a nonintrusive technique to quantify the local, throughwall average axial stress in an exposed pipe. The technique selected for evaluation and development is a low-frequency, electromagnetic technique, called multiparameter magnetic measurement (MPMM). MPMM is a combination of existing magnetic techniques including magnetic hysteresis measurement, nonlinear harmonic analysis, and multiparameter correlation. The work included both a proof-of-principle demonstration of the technique using samples of grade X-42, X-46, and X-52 pipe (Phase I), and further determination of practical applicability of the MPMM technique (Phase II). Phase II focused on evaluating the variability of magnetic response to stress among five samples of grade X-42 pipe.
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George, Grant, and Hawley. PR-015-13611-R01 Evaluation of Selected Sampling Techniques on Hydrocarbon-Wet Gas Streams. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), December 2014. http://dx.doi.org/10.55274/r0010403.

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This project evaluated selected single-phase gas sampling methods as candidates for use in sampling hydrocarbon-wet gas streams and obtaining representative samples of only the gas phase, rather than samples of both the gas and liquid. Two spot sampling methods, the helium �pop� method and the floating piston cylinder method, were chosen for evaluation. To capture samples of only the gas phase required one or more arrangements for separating liquids from the sample stream. To this end, a coalescing filter and a vortex separator were chosen for testing with the two sampling methods. The various sampling approaches were tested using the Sampling Method Performance Verification Procedure of API MPMS Chapter 14.1, Appendix F, adapted as appropriate for use in hydrocarbon-wet gas streams. Preliminary tests at SwRI�s Metering Research Facility (MRF) were used to identify possible problems with the equipment and sampling procedures, so that the equipment and procedures could be corrected before the formal tests were conducted. The formal tests were performed at a field site carrying a hydrocarbon-wet gas stream from a shale formation. Results of the formal tests produced recommendations to improve the general ability of the chosen wet-gas sampling method to capture accurate samples of the gas phase, as well as recommended changes to the API Sampling Verification Procedure for testing wet-gas sampling methods.
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Giddings, T. M., and B. A. Farnand. The selection of polymeric membranes for liquid phase separations. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/304571.

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Steimke, J. L. Orifice Selection for HB Line Phase II Eductor Systems. Office of Scientific and Technical Information (OSTI), September 2001. http://dx.doi.org/10.2172/786593.

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