Готові списки джерел за темами / Single stage design

Добірка наукової літератури з теми "Single stage design"

Автор: Grafiati
Опубліковано: 8 вересня 2023

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Статті в журналах з теми "Single stage design"

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Huber, L., and M. M. Jovanovic. "Design optimization of single-stage single-switch input-current shapers." IEEE Transactions on Power Electronics 15, no. 1 (January 2000): 174–84. http://dx.doi.org/10.1109/63.817375.

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Gouge, M. J., S. K. Combs, P. W. Fisher, and S. L. Milora. "Design considerations for single‐stage and two‐stage pneumatic pellet injectors." Review of Scientific Instruments 60, no. 4 (April 1989): 570–75. http://dx.doi.org/10.1063/1.1140365.

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3

Sun, Bao Wen, and Yun Xi Wu. "Single-Stage Power Factor Correction (PFC) Converter Design." Applied Mechanics and Materials 687-691 (November 2014): 3383–86. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.3383.

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A single-stage PFC converter was introduced in this paper, then the converter EMI filters, converters inductors, high-frequency transformers and power components were designed and chosen, proven to good effect.
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4

Soltanalian, Mojtaba, Heng Hu, and Petre Stoica. "Single-stage transmit beamforming design for MIMO radar." Signal Processing 102 (September 2014): 132–38. http://dx.doi.org/10.1016/j.sigpro.2014.03.013.

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5

Onwulata, C. I., and N. Goldberg. "Design of a single-stage mechanical fat separator." Journal of the American Oil Chemists' Society 74, no. 6 (June 1997): 679–83. http://dx.doi.org/10.1007/s11746-997-0200-3.

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Vemparala, Vignesh, Arun Tom Mathew, and Tirumala Rao Koka. "Design of single piece sabot for a single stage gas gun." IOP Conference Series: Materials Science and Engineering 263 (November 2017): 062059. http://dx.doi.org/10.1088/1757-899x/263/6/062059.

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Rosàs-Canyelles, Elisabet, Andrew J. Modzelewski, Alisha Geldert, Lin He, and Amy E. Herr. "Assessing heterogeneity among single embryos and single blastomeres using open microfluidic design." Science Advances 6, no. 17 (April 2020): eaay1751. http://dx.doi.org/10.1126/sciadv.aay1751.

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The process by which a zygote develops from a single cell into a multicellular organism is poorly understood. Advances are hindered by detection specificity and sensitivity limitations of single-cell protein tools and by challenges in integrating multimodal data. We introduce an open microfluidic tool expressly designed for same-cell phenotypic, protein, and mRNA profiling. We examine difficult-to-study—yet critically important—murine preimplantation embryo stages. In blastomeres dissociated from less well-studied two-cell embryos, we observe no significant GADD45a protein expression heterogeneity, apparent at the four-cell stage. In oocytes, we detect differences in full-length versus truncated DICER-1 mRNA and protein, which are insignificant by the two-cell stage. Single-embryo analyses reveal intraembryonic heterogeneity, differences between embryos of the same fertilization event and between donors, and reductions in the burden of animal sacrifice. Open microfluidic design integrates with existing workflows and opens new avenues for assessing the cellular-to-molecular heterogeneity inherent to preimplantation embryo development.
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Son, Yoolee, and Taebok Kim. "Two-stage capacity design problem in a single-collector-single-remanufacturer system." International Journal of Procurement Management 8, no. 3 (2015): 272. http://dx.doi.org/10.1504/ijpm.2015.069154.

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Petrakova, Ekaterina A., and Vladislav A. Sumatokhin. "Forecasting the main dimensions of single-stage cylindrical reducers at early design stages." Nauchno-tekhnicheskiy vestnik Bryanskogo gosudarstvennogo universiteta 5, no. 3 (September 25, 2019): 386–95. http://dx.doi.org/10.22281/2413-9920-2019-05-03-386-395.

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Stanley, Douglas O., Walter C. Engelund, Roger A. Lepsch, Mark McMillin, Kathryn E. Wurster, Richard W. Powell, Tony Guinta, and Resit Unal. "Rocket-powered single-stage vehicle configuration selection and design." Journal of Spacecraft and Rockets 31, no. 5 (September 1994): 792–98. http://dx.doi.org/10.2514/3.26514.

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Дисертації з теми "Single stage design"

1

Szirti, Daniel. "Development of a single-stage implosion-driven hypervelocity launcher." Thesis, McGill University, 2008. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=112585.

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The present study deals with the development of a single-stage implosion-driven hypervelocity launcher. A thin-walled tube filled with helium surrounded by explosives acts as a driver for the launcher. Implosion of the tube drives a strong shock that reflects back and forth between the projectile and the implosion pinch, generating very high temperatures and pressures. Simple analytic models were used to approximate the performance of the pump tube and its use as a driver for a launcher. Experiments to evaluate the implosion dynamics and performance of the pump tube were carried out, and implosion-driven launcher experiments demonstrated muzzle velocities above 4 km/s with 5-mm-diameter aluminum projectiles. Projectile integrity was verified by high-speed photography. Disagreement of experimental data with the analytical models of performance is mostly due to failure to seal the chamber of the launcher, resulting in loss of driver gas, and pump tube expansion, which weakens the precursor shock.
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2

Pneumatikakis, Aristodimos. "Modelling, analysis and design of higher-order single-stage sigma-delta modulators." Thesis, Imperial College London, 1999. http://hdl.handle.net/10044/1/7582.

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3

Cheng, Yongjie. "Design and Realization of a Single Stage Sigma-Delta ADC With Low Oversampling Ratio." Diss., CLICK HERE for online access, 2006. http://contentdm.lib.byu.edu/ETD/image/etd1561.pdf.

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Lessing, Marlon Henrique. "Analysis, design and implementation of single-stage high-frequency-isolated DC-AC flyback converters." Universidade Tecnológica Federal do Paraná, 2016. http://repositorio.utfpr.edu.br/jspui/handle/1/2410.

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Esta dissertação propõe a análise de dois conversores de estágio único, isolados em alta frequência e adequados para aplicações de conexão à rede elétrica. Inicialmente, é introduzida uma nova estratégia de modulação para o conversor flyback bidirecional com conexão diferencial. Esta modulação melhorada proporciona melhor desempenho, reduzindo os valores de corrente RMS para cada componente do circuito, contribuindo assim para a redução das perdas por condução. As análises estáticas do conversor operando em ambas estratégias de modulação alternativa e original são apresentadas. A análise dinâmica também é realizada, fornecendo a função de transferência da corrente de saída pela razão cíclica do conversor ligado à uma carga resistiva e acoplado a uma fonte de tensão. Um protótipo com potência de saída de 500 W, 20 kHz, com tensão de entrada de 70 V e 127 VRMS na tensão de saída é apresentado e os resultados experimentais que comparam a nova estratégia de modulação confirmam a análise teórica e desempenho superior. Uma tensão de saída com baixa THD é alcançada para ambas estratégias de modulação, operando em malha aberta em no modo de condução contínua. O segundo conversor é um flyback com grampeamento ativo adequado para ser utilizado como um micro-inversor em aplicações de energias renováveis. As principais características da topologia são o relativo baixo número de componentes, o isolamento em alta frequência, possibilidade de ser utilizado como elevador de tensão de saída e operação em ZVS. O grampeamento ativo permite recuperar a maior parte da energia armazenada na indutância de dispersão dos indutores flyback e, assim, uma melhoria na eficiência do conversor é atingida. A análise estática é fornecida para o conversor operando em CCM. Além disso, uma função de transferência da corrente de saída pela razão cíclica é apresentada para uma carga resistiva na saída. Para este conversor duas frequências de comutação de 100 kHz e 50 kHz foram testadas num protótipo construído para 500 W, com tensão de entrada de 70 V e tensão de saída de 127 VRMS.
This thesis proposes the analysis of two single-stage high-frequency isolated converters suited for grid-tied applications. Firstly, a new modulation strategy to the bidirectional flyback converter with differential output connection is introduced. This improved modulation provides better performance by reducing the RMS current values for every circuit element, thereby contributing to reduced conduction losses. The static analyses of the converter operating in both the original and the alternative switching strategies are presented. Dynamic analysis is also performed, providing the output-current-to-duty-cycle transfer function of the converter connected to a resistive load and coupled to an output voltage source. A 500 W, 20 kHz, 70 V input voltage and 127 VRMS output voltage prototype is presented and experimental results comparing the new modulation strategy to the original confirm the theoretical analyses and superior performance of the alternative switching strategy. A low THD output voltage is achieved for both switching strategies, operating in open loop and in continuous conduction mode. The second converter is an active-clamping flyback converter suitable to be used as a microinverter in renewable energy applications. The main features of the topology are the relatively low component count, high-frequency isolation, voltage step-up capability and zero voltage switching. The active clamping allows to recover most of the energy stored in the flyback inductors’ leakage inductance and thus an improvement on the system efficiency is achieved. The static analysis for CCM operation is provided. In addition, an output-current-to-duty-cycle transfer function for a resistive load connected to the output of the converter is presented. Two switching frequencies of 100 kHz and 50 kHz were tested in a prototype built for 500 W, 70 V input voltage and 127 VRMS output voltage.
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Le, Toan T. "A Single-Stage Passive Vibration Isolation System for Scanning Tunneling Microscopy." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2272.

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Scanning Tunneling Microscopy (STM) uses quantum tunneling effect to study the surfaces of materials on an atomic scale. Since the probe of the microscope is on the order of nanometers away from the surface, the device is prone to noises due to vibrations from the surroundings. To minimize the random noises and floor vibrations, passive vibration isolation is a commonly used technique due to its low cost and simpler design compared to active vibration isolation, especially when the entire vibration isolation system (VIS) stays inside an Ultra High Vacuum (UHV) environment. This research aims to analyze and build a single-stage passive VIS for an STM. The VIS consists of a mass-spring system staying inside an aluminum hollow tube. The mass-spring system is comprised of a circular copper stage suspended by a combination of six extension springs, and the STM stays on top of the copper stage. Magnetic damping with neodymium magnets, which induces eddy currents in the copper conductor, is the primary damping method to reduce the vibrations transferred to the mass-spring system. FEMM and MATLAB® are used to model magnetic flux density and damping coefficients from eddy current effect, which will help determine the necessary damping ratios for the VIS. Viton, which demonstrates a high compatibility with vacuum environments, will also serve as a great damping material between joints and contacts for the housing tube. Viton will be modeled as a Mooney-Rivlin hyperelastic material whose material parameters are previous studied, and Abaqus will be used as a Finite Element Analysis software to study the Viton gaskets’ natural frequencies. The natural frequencies of the aluminum hollow tube will also be investigated through Abaqus.
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Yilmaz, Hasan. "Design, Application And Comparison Of Single Stage Flybackand Sepic Pfc Ac/dc Converters For Power Led Lighting Application." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615097/index.pdf.

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In this work, single stage power factor corrected AC/DC converters for LEDs
single stage Flyback converter having different configuration from the traditional Flyback and single stage SEPIC converter is investigated. The study involves analysis, circuit design, performance comparisons and implementation. The study covers LEDs
their developments, characteristics and state-of-art in this new technology. The circuits are investigated by means of computer simulations. Operating principles and operating modes are studied along with design calculations. After applying prototypes in laboratory, the simulation results and theoretical analyses are confirmed. The single stage Flyback converter has high voltage input (220-240 Vac), and the output feeds up to 216 HB-LEDs, with the ratings of 24 V, 3.25 A with 90 W. The single stage SEPIC converter with universal input (80-265 Vac) has an output that feeds 21 power LEDs, with 67 V, 0.30 and 20 W ratings.
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Wen, Hao. "High-Efficiency and High-Frequency Resonant Converter Based Single-Stage Soft-Switching Isolated Inverter Design and Optimization with Gallium-Nitride (GaN)." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/105134.

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Анотація:
Isolated inverter can provide galvanic isolation which is necessary for some applications with safety regulations. Traditionally, a two-stage configuration is widely applied with isolated dc-dc stage and a sinusoidal pulse-width-modulated (SPWM) dc-ac stage. However, this two-stage configuration suffers from more components count, more complex control and tend to have lower efficiency and lower power density. Meanwhile, a large dc bus capacitor is needed to attenuate the double line frequency from SPWM for two-stage configuration. Therefore, the single-stage approach including an isolated dc-rectified sine stage and a line frequency unfolder is preferable. Since the unfolder circuit is at line frequency being almost lossless, the isolated dc-rectified sine stage becomes critical. However, the relevant research for the single-stage isolated inverter is limited. People either utilize PWM based converter as dc-rectified sine stage with duty cycle adjustment or apply SRC or LLC resonant converter for better soft switching characteristics. For PWM based converter, hard switching restricts the overall inverter efficiency, while for SRC/LLC, enough wide voltage gain range and full range ZVS are the major issues. This dissertation aims to provide solutions for a high-efficiency, high-frequency resonant converter based single-stage soft-switching isolated inverter design. The LLC and LCLCL resonant converters are applied as the isolated dc-rectified sine stage with variable frequency modulation (VFM). Therefore, the rectified sine wave generation consists of many dc-dc conversion with different switching frequencies and an efficient dc-rectified sine stage design needs each dc-dc conversion to be with high efficiency. This dissertation will first propose the optimization methods for LLC converter dc-dc conversion. ZVS models are derived to ensure fully ZVS performance for primary side GaN devices. As a large part in loss breakdown, the optimization for transformer is essential. The LLC converter can achieve above 99% efficiency with proposed optimization approach. Moreover, the channel turn-off energy model is presented for a more accurate loss analysis. With all the design and optimization considerations, a MHz LLC converter based isolated inverter is designed and a hybrid modulation method is proposed, which includes full bridge (FB) VFM for output high line region and half bridge (HB) VFM for output low line region. By changing from FB to HB, the output voltage gain is reduced to half to have a wider voltage gain range. However, the total harmonic distortion (THD) of output voltage at light load will be impacted since the voltage gain will be higher with lighter load at the maximum switching frequency. A MHz LCLCL converter based isolated inverter is proposed for a better output voltage THD at light load conditions. The paralleled LC inside the LCLCL resonant tank can naturally create a zero voltage gain point at their resonant frequency, which shows superior performance for rectified sine wave generation. Besides the better THD performance, the LCLCL converter based isolated inverter also features for easier control, better ZVS performance and narrower switching frequency range. Meanwhile, the LCLCL based inverter topology has bi-directional power flow capability as well. With variable frequency modulation for ac-dc, this topology is still a single-stage solution compared to the traditional two-stage solution including PFC + LLC configuration.
Doctor of Philosophy
Inverters can convert dc voltage to ac voltage and typically people use two-stage approach with isolated dc-dc stage and dc-ac stage. However, this two-stage configuration suffers from more components count, more complex control and tend to have lower efficiency and lower power density. Therefore, the single-stage solution with dc-rectified sine wave stage and a line frequency unfolder becomes appealing. The unfolder circuit is to unfold the rectifier sine wave to an ac sine wave at the output. Since the unfolder is at line frequency and can be considered lossless, the key design is for the dc-rectified sine stage. The resonant converter featured for soft switching seems to be a good candidate. However, the inverter needs soft switching for the whole range and an enough wide voltage gain, which makes the design difficult, especially the target is high efficiency for the overall inverter. This dissertation aims to provide solutions for a high-efficiency, high-frequency resonant converter based single-stage soft-switching isolated inverter design. The LLC and LCLCL resonant converters are applied as the isolated dc-rectified sine stage with variable frequency modulation (VFM). Therefore, the rectified sine wave generation consists of many dc-dc conversion with different switching frequencies and an efficient dc-rectified sine stage design needs each dc-dc conversion to be with high efficiency. The design considerations and optimization methods for the LLC dc-dc conversion are firstly investigated. Based on these approaches, a MHz LLC converter based isolated inverter is designed with proposed hybrid modulation method. To further improve the light load performance, a MHz LCLCL converter based isolated inverter topology is proposed. The paralleled LC inside the LCLCL resonant tank can naturally create a zero voltage gain point which shows superior characteristics for rectified sine wave generation. Moreover, the LCLCL resonant converter based topology has bi-directional capability as well so it can work well for ac voltage to dc voltage conversion.
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Li, Chung-lun. "Conceptual design of single and multiple state mechanical devices : an intelligent CAD approach /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19712108.

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李仲麟 and Chung-lun Li. "Conceptual design of single and multiple state mechanical devices: an intelligent CAD approach." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31237332.

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Bautze, Tobias. "Towards quantum optics experiments with single flying electrons in a solid state system." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENY059/document.

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Ce travail de thèse porte sur l’étude fondamentale de systèmes nano-électroniques,mesurés à très basse température. Nous avons réalisé des interféromètres électroniques àdeux chemins à partir d’électrons balistiques obtenus dans un gaz 2D d’électrons d’unehétéro-structure GaAs/AlGaAs. Nous montrons que la phase des électrons, et ainsileur état quantique,peut être contrôlée par des grilles électrostatiques. Ces dispositifsse révèlent être des candidats prometteurs pour la réalisation d’un qubit volant. Nousavons développé une simulation numérique évoluée d’un modèle de liaisons fortes à partirde transport quantique ballistique qui décrit toutes les découvertes expérimentales etnous apporte une connaissance approfondie sur les signatures expérimentales de cesdispositifs particuliers. Nous proposons des mesures complémentaires de ce système dequbit volants. Pour atteindre le but ultime, à savoir un qubit volant à un électron unique,nous avons assemblé la source à électron unique précédemment développée dans notreéquipe à un beam splitter électronique. Les électrons sont alors injectés depuis une boîtequantique à un train de boîte quantiques en mouvement. Ce potentiel électrostatique enmouvement est généré par des ondes acoustiques de surface créées par des transducteursinter-digités sur le substrat GaAs piézo-électrique. Nous avons étudié et optimisé chacunde ces composants fondamentaux nécessaires à la réalisation d’un beam splitter à électronunique et développé un procédé local et fiable de fabrication. Ce dispositif nous permet d’étudier les interactions électroniques pour des électrons isolés et pourra servir de basede mesure pour des expériences d’optique quantiques sur un système électronique del’état condensé. Enfin, nous avons développé un outil puissant de simulation du potentielélectrostatique à partir de la géométrie des grilles. Ceci permet d’optimiser la conceptiondes échantillons avant même leur réalisation. Nous proposons ainsi un prototype optimiséde beam splitter à électron unique
This thesis contains the fundamental study of nano-electronic systems at cryogenictemperatures. We made use of ballistic electrons in a two-dimensional electron gasin a GaAs/AlGaAs heterostructure to form a real two-path electronic interferometerand showed how the phase of the electrons and hence their quantum state can becontrolled by means of electrostatic gates. The device represents a promising candidateof a flying qubit. We developed a sophisticated numerical tight-binding model based onballistic quantum transport, which reproduces all experimental findings and allows togain profound knowledge about the subtle experimental features of this particular device.We proposed further measurements with this flying qubit system. With the ultimate goalof building a single electron flying qubit, we combined the single electron source that hasbeen developed in our lab prior to this manuscript with an electronic beam splitter. Theelectrons are injected from static quantum dots into a train of moving quantum dots.This moving potential landscape is induced in the piezoelectric substrate of GaAs bysurface acoustic waves from interdigial transducers. We studied and optimized all keycomponents, which are necessary to build a single electron beam splitter and built up areliable local fabrication process. The device is capable of studying electron interactionson the single electron level and can serve as a measurement platform for quantum opticsexperiments in electronic solid state systems. Finally, we developed a powerful toolcapable of calculating the potential landscapes of any surface gate geometry, which canbe used as a fast feedback optimization tool for device design and proposed an optimizedprototype for the single electron beam splitter
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Книги з теми "Single stage design"

1

American Institute of Aeronautics and Astronautics., Langley Research Center, and International Aerospace Planes and Hypersonics Technologies Conference (6th : 1995 : Chattanooga, Tenn.), eds. Airbreathing/rocket single-stage-to-orbit design matrix. Washington, D.C: American Institute of Aeronautics and Astronautics, 1995.

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2

American Institute of Aeronautics and Astronautics. and International Aerospace Planes and Hypersonics Technologies Conference (6th : 1995 : Chattanooga, TN).), eds. Airbreathing/rocket single-stage-to-orbit design matrix. Washington, D.C: American Institute of Aeronautics and Astronautics, 1995.

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3

Center, NASA Glenn Research, ed. An air-breathing launch vehicle concept for single-stage-to-orbit. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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4

Center, NASA Glenn Research, ed. An air-breathing launch vehicle concept for single-stage-to-orbit. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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5

Center, NASA Glenn Research, ed. An air-breathing launch vehicle concept for single-stage-to-orbit. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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6

Mehta, Unmeel B. A two-stage-to-orbit spaceplane concept with growth potential. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 2001.

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Mehta, Unmeel B. A two-stage-to-orbit spaceplane concept with growth potential. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 2001.

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Mehta, Unmeel B. A two-stage-to-orbit spaceplane concept with growth potential. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 2001.

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Mehta, Unmeel B. A two-stage-to-orbit spaceplane concept with growth potential. Moffett Field, Calif: National Aeronautics and Space Administration, Ames Research Center, 2001.

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10

United States. National Aeronautics and Space Administration., ed. Requirements report for SSTO vertical take-off/horizontal landing vehicle. [Downey, Calif.]: Rockwell Aerospace, Space Systems Division, 1994.

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Частини книг з теми "Single stage design"

1

Santcci, Robert M., Peter Werwath, and Cecilia Cassidy. "Stage: Design and Feasibility." In Single Family Selective Rehabilitation, 73–88. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-9726-1_3.

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2

Rauch, Geraldine, Svenja Schüler, and Meinhard Kieser. "The Single-Stage Design." In Springer Series in Pharmaceutical Statistics, 31–51. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-73770-6_5.

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Rauch, Geraldine, Svenja Schüler, and Meinhard Kieser. "The Single-Stage Design." In Springer Series in Pharmaceutical Statistics, 91–99. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-73770-6_9.

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4

Wu, Jianrong. "Two-Stage Design Evaluating Survival Distributions." In Single-Arm Phase II Survival Trial Design, 109–44. Boca Raton: Chapman and Hall/CRC, 2021. http://dx.doi.org/10.1201/9781003129059-6.

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Wu, Jianrong. "Two-Stage Design Evaluating Survival Probabilities." In Single-Arm Phase II Survival Trial Design, 49–76. Boca Raton: Chapman and Hall/CRC, 2021. http://dx.doi.org/10.1201/9781003129059-4.

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Wu, Jianrong. "One-Stage Design Evaluating Survival Distributions." In Single-Arm Phase II Survival Trial Design, 77–108. Boca Raton: Chapman and Hall/CRC, 2021. http://dx.doi.org/10.1201/9781003129059-5.

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Wu, Jianrong. "One-Stage Design Evaluating Survival Probabilities." In Single-Arm Phase II Survival Trial Design, 25–48. Boca Raton: Chapman and Hall/CRC, 2021. http://dx.doi.org/10.1201/9781003129059-3.

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van der Horst, Marcel J., Wouter A. Serdijn, and André C. Linnenbank. "Design of emi-Resilient Single-Stage Amplifiers." In Analog Circuits and Signal Processing, 149–90. Cham: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00593-5_5.

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Valliant, Richard, Jill A. Dever, and Frauke Kreuter. "Project 1: Design a Single-Stage Personnel Survey." In Statistics for Social and Behavioral Sciences, 15–23. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-93632-1_2.

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Valliant, Richard, Jill A. Dever, and Frauke Kreuter. "Project 1: Design a Single-Stage Personnel Survey." In Practical Tools for Designing and Weighting Survey Samples, 15–23. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6449-5_2.

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Тези доповідей конференцій з теми "Single stage design"

1

Wei, Qiang, David B. Kittelson, and Winthrop F. Watts. "Single-Stage Dilution Tunnel Design." In SAE 2001 World Congress. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2001. http://dx.doi.org/10.4271/2001-01-0207.

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2

CARTER, J., J. RACHEL, B. CORBIN, and R. BLOCK. "Vehicle Management System for single stage rocket." In Aerospace Design Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-963.

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3

Li Qiang, Li Lei, and Lv Guangqiang. "Design of single stage LED driver." In 2012 7th International Power Electronics and Motion Control Conference (IPEMC 2012). IEEE, 2012. http://dx.doi.org/10.1109/ipemc.2012.6258902.

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4

Jiarui, Xu, Zhang Chunguang, and Wang Ruixin. "Single Stage Inverted Pendulum Controller Design." In 2021 3rd International Conference on Applied Machine Learning (ICAML). IEEE, 2021. http://dx.doi.org/10.1109/icaml54311.2021.00098.

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HOLLOWAY, J., and C. LIMERICK. "The challenge of reusable, single stage to orbit propulsion." In Aerospace Design Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-966.

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COPPER, J. "Single stage rocket concept selection and design." In Space Programs and Technologies Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-1383.

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Aziz, F., N. Ahmad, and F. A. S. Musa. "Design topology: 90 nm single stage FGMOS amplifier design." In 4TH ELECTRONIC AND GREEN MATERIALS INTERNATIONAL CONFERENCE 2018 (EGM 2018). Author(s), 2018. http://dx.doi.org/10.1063/1.5080903.

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Hunt, James. "Airbreathing/rocket single-stage-to-orbit design matrix." In International Aerospace Planes and Hypersonics Technologies. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1995. http://dx.doi.org/10.2514/6.1995-6011.

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Naraharisetti, Kali, and Janamejaya Channegowda. "Single Stage PFC Flyback AC-DC Converter Design." In 2020 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT). IEEE, 2020. http://dx.doi.org/10.1109/conecct50063.2020.9198408.

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Mo, Wai Keung, Kasper M. Paasch, and Thomas Ebel. "Single-Stage Single-Switch curved air gap PFC integrated flyback transformer design." In 2023 IEEE 17th International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG). IEEE, 2023. http://dx.doi.org/10.1109/cpe-powereng58103.2023.10227401.

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Звіти організацій з теми "Single stage design"

1

Gouge, M. J., S. K. Combs, P. W. Fisher, and S. L. Milora. Design considerations for single-stage and two-stage pneumatic pellet injectors. Office of Scientific and Technical Information (OSTI), September 1988. http://dx.doi.org/10.2172/6729779.

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2

Hessman. PR-322-05215-R03 Pipeline Pump Study Virtual Prototype CFD Investigation. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), June 2014. http://dx.doi.org/10.55274/r0011044.

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Utilize the latest state of the art design tools to develop an optimal single stage pipeline pump design that improves off-peak efficiency without negatively impacting other performance parameters (suction performance, reliability, etc.).
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3

Cheng, David. PR-559-15210-R01 Piping Effect on the Performance Reliability and Integrity of Pumps. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 2019. http://dx.doi.org/10.55274/r0011572.

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The study focuses on the identification and evaluation of aspects affecting pipeline pump performance related to the suction and discharge piping layouts. The study was conducted through a literature review and survey interviews with pipeline operators and equipment manufacturers. This report provides results of the literature review and a survey of publicly available information concerning the best practices for piping layout design at pipeline pump stations. The study is limited to pipeline centrifugal pumps. Specifically, this review considers API type BB 1, 2, and 3 and API VS 6 and 7 pumps. The pumps considered are single suction, double suction, single and multiple stage pumps.
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4

Popel, Maiia V., and Mariya P. Shyshkina. The areas of educational studies of the cloud-based learning systems. [б. в.], September 2019. http://dx.doi.org/10.31812/123456789/3245.

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The article analyzes the current stage of educational studies of the cloud-based learning systems. The relationship between the notions of the cloud-based learning system and the cloud-based learning environment are investigated. It was found that the researchers paid most attention to the design of a cloud-based learning environment. However, in the process of a cloud-based environment design, the researchers consider a cloud-based system as a component within the cloud-based learning environment of as a stage in the process of design. It is shown that in the research literature there is no single interpretation of the concept of a cloud-based system for educational purposes. Still the number of basic approaches to the interpretation of the concept under investigation are revealed. The first approach is based on the understanding of the system, as a set of cloud services or cloud-based technologies. The second approach is to consider a separate cloud service as a cloud-based learning system. In this case, the cloud service tools should include such components that cover the content, the tools, the forms and the methods of learning. The structure of the cloud-based learning system within the interpretation of the latest works of Ukrainian researchers is considered.
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5

Robinett, Fred. PR-471-16206-R01 Suction Piping Effect on Pump Performance Testing. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), April 2019. http://dx.doi.org/10.55274/r0011577.

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Pump suction piping testing was performed to measure the influence on pump performance and mechanical operation, and also provide a benchmark for comparing, verifying and improving CFD modeling techniques. Testing was performed in Sulzer's pump test laboratory, in Winterthur Switzerland, using a single stage double suction model pump a with similar specific speed and design as used in many crude oil pipeline installations. Testing included a baseline test with a straight pipe with a flow straightener at the pump suction and two arrangements with pipe elbows directly at the pump suction. All tests were performed with mineral oil at viscosities ranging from 90 to 500 cSt. Pump performance as well as several static and dynamic measurements were taken, including static pressure measurements along the suction pipe, dynamic pressure measurements at the pump suction and discharge, pump axial thrust and displacements and pump torque. The tests with elbows at the pump suction are compared to the baseline test results. This work will benefit the liquids pipeline station designers and operators and also CFD analysts by providing actual tested comparisons and benchmark measurements.
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Weller, Joel I., Ignacy Misztal, and Micha Ron. Optimization of methodology for genomic selection of moderate and large dairy cattle populations. United States Department of Agriculture, March 2015. http://dx.doi.org/10.32747/2015.7594404.bard.

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The main objectives of this research was to detect the specific polymorphisms responsible for observed quantitative trait loci and develop optimal strategies for genomic evaluations and selection for moderate (Israel) and large (US) dairy cattle populations. A joint evaluation using all phenotypic, pedigree, and genomic data is the optimal strategy. The specific objectives were: 1) to apply strategies for determination of the causative polymorphisms based on the “a posteriori granddaughter design” (APGD), 2) to develop methods to derive unbiased estimates of gene effects derived from SNP chips analyses, 3) to derive optimal single-stage methods to estimate breeding values of animals based on marker, phenotypic and pedigree data, 4) to extend these methods to multi-trait genetic evaluations and 5) to evaluate the results of long-term genomic selection, as compared to traditional selection. Nearly all of these objectives were met. The major achievements were: The APGD and the modified granddaughter designs were applied to the US Holstein population, and regions harboring segregating quantitative trait loci (QTL) were identified for all economic traits of interest. The APGD was able to find segregating QTL for all the economic traits analyzed, and confidence intervals for QTL location ranged from ~5 to 35 million base pairs. Genomic estimated breeding values (GEBV) for milk production traits in the Israeli Holstein population were computed by the single-step method and compared to results for the two-step method. The single-step method was extended to derive GEBV for multi-parity evaluation. Long-term analysis of genomic selection demonstrated that inclusion of pedigree data from previous generations may result in less accurate GEBV. Major conclusions are: Predictions using single-step genomic best linear unbiased prediction (GBLUP) were the least biased, and that method appears to be the best tool for genomic evaluation of a small population, as it automatically accounts for parental index and allows for inclusion of female genomic information without additional steps. None of the methods applied to the Israeli Holstein population were able to derive GEBV for young bulls that were significantly better than parent averages. Thus we confirm previous studies that the main limiting factor for the accuracy of GEBV is the number of bulls with genotypes and progeny tests. Although 36 of the grandsires included in the APGD were genotyped for the BovineHDBeadChip, which includes 777,000 SNPs, we were not able to determine the causative polymorphism for any of the detected QTL. The number of valid unique markers on the BovineHDBeadChip is not sufficient for a reasonable probability to find the causative polymorphisms. Complete resequencing of the genome of approximately 50 bulls will be required, but this could not be accomplished within the framework of the current project due to funding constraints. Inclusion of pedigree data from older generations in the derivation of GEBV may result is less accurate evaluations.
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7

Rice, C. K. Design Optimization and the Limits of Steady-State Heating Efficiency for Conventional Single-Speed Air-Source Heat Pumps. Office of Scientific and Technical Information (OSTI), June 2001. http://dx.doi.org/10.2172/814612.

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8

Hair. L52003 Application of the Crack Layer Theory for Understanding and Modeling of SCC in High Pressure. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), August 2003. http://dx.doi.org/10.55274/r0010893.

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A stochastic features of SCC colony, such as corrosion pit distribution, SC crack initiation from the pits and SC crack aspect ratio, SC crack cluster formation, SC cluster interaction and instability, are observed and characterized. A concept of a single crack equivalent to a cluster of cracks is introduced to simplify computational work on clusters evolution and instability. Various criteria of equivalence for different stages of clusters evolution are discussed. An accelerated test with a number of accelerating factors has been designed and performed for simulation of individual SC crack growth. Corrosion products at each stage of single crack propagation are investigated by means of Raman and FTIR analysis. The crack layer theory is adopted for modeling of SC crack growth. It provides the formalism for modeling of the effect of such processes as electro-chemical reactions, hydrogen embrittlement, and mechanical loading rates on crack growth rate. Finally, a computer simulation of SC crack growth was performed and validated by the available set of experimental data.
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9

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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Tom, Joe, Marcelo Garcia, and Haode Wang. Review of Methodologies to Assess Bridge Safety During and After Floods. Illinois Center for Transportation, May 2022. http://dx.doi.org/10.36501/0197-9191/22-008.

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This report summarizes a review of technologies used to monitor bridge scour with an emphasis on techniques appropriate for testing during and immediately after design flood conditions. The goal of this study is to identify potential technologies and strategies for Illinois Department of Transportation that may be used to enhance the reliability of bridge safety monitoring during floods from local to state levels. The research team conducted a literature review of technologies that have been explored by state departments of transportation (DOTs) and national agencies as well as state-of-the-art technologies that have not been extensively employed by DOTs. This review included informational interviews with representatives from DOTs and relevant industry organizations. Recommendations include considering (1) acquisition of tethered kneeboard or surf ski-mounted single-beam sonars for rapid deployment by local agencies, (2) acquisition of remote-controlled vessels mounted with single-beam and side-scan sonars for statewide deployment, (3) development of large-scale particle image velocimetry systems using remote-controlled drones for stream velocity and direction measurement during floods, (4) physical modeling to develop Illinois-specific hydrodynamic loading coefficients for Illinois bridges during flood conditions, and (5) development of holistic risk-based bridge assessment tools that incorporate structural, geotechnical, hydraulic, and scour measurements to provide rapid feedback for bridge closure decisions.
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