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Relevant bibliographies by topics / Margin design influence

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Academic literature on the topic 'Margin design influence'

Author: Grafiati

Published: 8 September 2021

Last updated: 29 July 2025

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Journal articles on the topic "Margin design influence"

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Silva, Lucilene, Tomas Grönstedt, Carlos Xisto, Luiz Whitacker, Cleverson Bringhenti, and Marcus Lejon. "Analysis of Blade Aspect Ratio’s Influence on High-Speed Axial Compressor Performance." Aerospace 11, no. 4 (2024): 276. http://dx.doi.org/10.3390/aerospace11040276.

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The ratio between blade height and chord, named the aspect ratio (AR), plays an important role in compressor aerodynamic design. Once selected, it influences stage performance, blade losses and the stage stability margin. The choice of the design AR involves both aerodynamic and mechanical considerations, and an aim is frequently to achieve the desired operating range while maximizing efficiency. For a fixed set of aerodynamic and geometric parameters, there will be an optimal choice of AR that achieves a maximum efficiency. However, for a state-of-the-art aero-engine design, optimality means

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Hajaj, Tareq, Diana Marian, Cristian Zaharia, et al. "Fracture Resistance of CAD/CAM-Fabricated Zirconia and Lithium Disilicate Crowns with Different Margin Designs: Implications for Digital Dentistry." Journal of Functional Biomaterials 16, no. 6 (2025): 205. https://doi.org/10.3390/jfb16060205.

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Objective: This in vitro study aimed to evaluate the influence of cervical margin design—tangential versus chamfer—on the fracture resistance of monolithic crowns fabricated from lithium disilicate and zirconia ceramics. Materials and Methods: Forty extracted human molars were randomly assigned to two preparation types: chamfer and tangential. Each group was restored with CAD/CAM-fabricated crowns made from either zirconia (IPS e.max® ZirCAD Prime) or lithium disilicate (IPS e.max® CAD), resulting in four subgroups (n = 10). Standardized adhesive cementation protocols were applied. After 24 h

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Havrland, B., M. Kavka, and M. Růžička. "Influence of factors on the maize-grain mechanized technology net margin." Research in Agricultural Engineering 52, No. 2 (2012): 69–79. http://dx.doi.org/10.17221/4882-rae.

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a tendency to reduce number of operations by their association carries technical, environmental as well as economic aspects. Technical and environmental features are apparent and can be described with couple of quite logic positive effects and consequences. It is rather difficult to exactly identify economic proceeds that must especially be seen in producer&rsquo;s final perception (net margin). Methodology of net margin calculation is complicated and sometimes not fully transparent. A new (proper) methodological approach has been conceived in the concept of ATMP (Agricultural Technology M

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Massardo, A., and A. Satta. "Axial Flow Compressor Design Optimization: Part I—Pitchline Analysis and Multivariable Objective Function Influence." Journal of Turbomachinery 112, no. 3 (1990): 399–404. http://dx.doi.org/10.1115/1.2927673.

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The design of an axial flow compressor stage has been formulated as a nonlinear mathematical programming problem with the objective of minimizing the aerodynamic losses and the weight of the stage, while maximizing the compressor stall margin. Aerodynamic as well as mechanical constraints are considered in the problem formulation. A method of evaluating the objective function and constraints of the problem with a pitchline analysis is presented. The optimization problem is solved by using the penalty function method in which the Davidon-Fletcher-Powell variable metric minimization technique is

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Bazanella, A. S., R. Reginatto, and R. Valiatti. "Robustness margins for global asymptotic stability in indirect field-oriented control of induction motors." Sba: Controle & Automação Sociedade Brasileira de Automatica 13, no. 3 (2002): 307–13. http://dx.doi.org/10.1590/s0103-17592002000300009.

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The influence of the rotor time constant mismatch on the stability of induction motors under indirect field oriented control is analyzed. The paper focuses on the global asymptotic stability property and extends the results of []. Robustness margins for global asymptotic stability with respect to rotor time constant mismatches are obtained. The effect of the PI settings in such robustness margins is clarified allowing to derive design guidelines. The methodology is applied to two different induction motor drive systems illustrating the stability margin estimates.

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Wang, Sen, Pengzhao Xu, Guangsong Ma, Ruicheng Li, and Chaoqun Wei. "Analysis of the influence of blast mechanics environment on product structure." Journal of Physics: Conference Series 3019, no. 1 (2025): 012030. https://doi.org/10.1088/1742-6596/3019/1/012030.

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Abstract In view of the problem that the blast mechanics environment may cause damage to the product structure, this paper establishes a numerical model for analyzing the influence of the blast mechanics environment on the product structure. The numerical model is verified through field tests, and the verified numerical model is used to analyze the structural stress and design margin of the product’s main components in the blast mechanics environment. The simulation and analysis results show that the product designed in this paper will not be damaged under the action of the blast mechanics env

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Cheng, Hao, Zhaoyun Song, and Bo Liu. "Aerodynamic Study on the Influence Mechanism of Bow Blades on the Flow Field of Supersonic Tandem Rotors." Energies 15, no. 12 (2022): 4474. http://dx.doi.org/10.3390/en15124474.

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In order to research the influence mechanism of bow blades on the flow field of supersonic tandem rotors of compressors, the supersonic rotor rotor37 is taken as the prototype and redesigned as a supersonic tandem rotor. Compared with the prototype rotor37, the efficiency of the design tandem rotor is increased by 0.24% and the stall margin is increased by about 5.6%. Although the negative bow blade deteriorates the flow field in the tip region and the hub region, it significantly increases the efficiency and total pressure ratio of the tandem rotor from 20% span to 85% span. The efficiency of

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Chen, Liufu, Tao Zhou, Zhenlin Xu, and Teng Zhang. "Delay Margin Computation and Controller Design of Time-delayed AGC System Based on Root Locus Analysis." E3S Web of Conferences 252 (2021): 01022. http://dx.doi.org/10.1051/e3sconf/202125201022.

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To investigate the small-signal stability of automatic generation control (AGC) system with constant communication delay, this paper establishes its state-space based on Padé approximation and conducts eigenvalue calculation. Then, by tracking the change of eigenvalues with time delay, the time-delay margin can be confirmed. Different controller parameters have complex influence on time delay margin and damping performance, so this paper utilizes particle swarm optimization (PSO) to obtain the optimal PI controller parameters to derive delay margin largest and an ideal damping performance. Fin

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Yan, Song, and WuLi Chu. "Influence of self-circulating casing treatment with double-bleed ports structure on compressor performance." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 234, no. 11 (2020): 1743–56. http://dx.doi.org/10.1177/0954410020918405.

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Casing treatment is an effective way to improve the stable working margin of the compressor and plays an important role in ensuring the stable and safe work of the compressor. On the premise that the numerical results are in agreement with the experimental values, the paper study on a new type of the self-circulating casing treatment with double-bleed ports structure was carried out on the NASA rotor 37 by numerical simulation. It is found that compared with the self-circulating casing treatment with single-bleed port structure, the self-circulating casing treatment with double-bleed ports str

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XU, Feng, Huirong JIANG, Rui WANG, and Xionglin LUO. "Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes." Chinese Journal of Chemical Engineering 22, no. 1 (2014): 51–58. http://dx.doi.org/10.1016/s1004-9541(14)60010-0.

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Dissertations / Theses on the topic "Margin design influence"

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Hill, Glen 1955. "The architecture of circularity : design, Heidegger and the earth." Phd thesis, Faculty of Architecture, 1997. http://hdl.handle.net/2123/4039.

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Bolle, Caroline. "Influence de la conception implantaire sur l'adaptation tissulaire marginale précoce : une étude histologique chez le Beagle." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10117/document.

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Le maintien des tissus péri-implantaires sains à un niveau le plus coronaire possible conditionne le succès à long terme des réhabilitations implanto-portées. Dès lors, la mise en place d'une barrière muqueuse protectrice et la préservation de l'os marginal au cours des premières semaines de cicatrisation est indispensable. Le design implantaire influence les remodelages tissulaires intervenant au niveau du col de l'implant lors des phases initiales de cicatrisation. L'objet de ce travail est d'analyser histologiquement chez le Beagle l'influence de deux systèmes implantaires innovants sur les

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Pinto, Pedro Miguel Sequeira. "Influência dos tipos de preparações em restaurações dento-suportadas." Master's thesis, 2019. http://hdl.handle.net/10284/9034.

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A reabilitação oral com recurso a prótese fixa é uma solução cada vez mais utilizada pelos médicos dentistas. Deste facto advém a necessidade de preparar o dente para receber a restauração. Desde a decisão do tipo de preparação dentária a usar e localização da linha de terminação, existe um estudo das condições e possibilidades do caso. É então fundamental perceber quais são as situações nas quais se aplica cada tipo preparação, baseado na evidência científica, por forma a obter o sucesso clínico. Deste modo, torna-se indispensável o conhecimento sobre a influência de cada um destes tipos, nom

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Hung, Ling-Yu, and 洪令昱. "The Influences of Patent Counts, Inventors and Patent Share upon EBIT Margin in American IC Design industry." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/87808176525575683933.

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碩士<br>國立臺北大學<br>企業管理學系<br>102<br>The competitive advantages of an enterprise are based on the better tangible assets, intangible assets and the managerial abilities from the competitors. Breitzman & Thomas (2002) find that when measuring the value of the intangible assets, we should use the patent indices. The importance of these patent indices is different among various industries, but it is an important issue for the enterprise which is high knowledge-intensive and really emphasis on research abilities, also has tremendous influence of how they gain and maintain the competitive advantages. 　

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Books on the topic "Margin design influence"

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Baden-Baden, Staatliche Kunsthalle, ed. Entre deux actes, loge de comedienne: Richard Artschwager, Nairy Baghramian, Cosima von Bonin, Marc Camille Chaimowicz, Fischli & Weiss, Martin Kippenberger, Janette Laverriere, Meuser, Carlo Mollino, Claes Oldenburg, Tobias Rehberger, Franz West. König, 2009.

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Serebryakov, Oleg. Ecological and geological problems of development of oil and gas fields in the Caspian region. INFRA-M Academic Publishing LLC., 2017. http://dx.doi.org/10.12737/24289.

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The paper summarizes and examined extensive evidence on the environmental, geological and technological challenges of exploration and production of oil and gas, encountered during the development of the gigantic fields. Investigated environmental problems of underground disposal of wastes, the formation of zones of technogenic pollution, ecology megalonyx pressures and many others. Describes the environmental effects of oil and gas companies on the environment. The proposal for reducing the negative anthropogenic influence on the geoecological conditions of the environment. Justified the monit

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Rivers, Isabel. Roman Catholic Influences. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198269960.003.0007.

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Methodists and Quakers had a particular interest in pre- and post-Reformation continental Catholic writers of a mystical, spiritual, or quietist tendency, including Thomas à Kempis, Madame Guyon, Fénelon, Antoinette Bourignon, de Molinos, and the lives of Armelle Nicolas, M. de Renty, and Gregory Lopez. This chapter indicates the ways in which knowledge of these Catholic models was disseminated by Pierre Poiret, William Law, John Wesley, and the Quakers Josiah Martin and James and John Gough, among others, and analyses the carefully abridged editions of Catholic works designed for Methodist an

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Armstrong, Richard H. Dante’s Influence on Virgil. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198810810.003.0003.

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This chapter highlights one particular moment in translation theory that reveals Dante’s influence on the role of translation as reception in vernacular literatures. Armstrong focuses on the not widely known work of Enrique de Villena (1384–1434), whose translation can be seen as a transitional point between medieval and modern translational practices and as marking the beginning of a ‘vernacularization’ of translation, a process designed to make the translated text more accessible to the target audience. In analysing the Castilian Eneida of Villena, Armstrong reflects on the philological cons

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Thrush, Simon, Judi Hewitt, Conrad Pilditch, and Alf Norkko. Ecology of Coastal Marine Sediments. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780198804765.001.0001.

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Marine sediments dominate the seafloor, creating one of the largest ecosystems on earth. Marine sediments contain some of the steepest known natural chemical gradients and are extraordinarily productive and reactive, particularly in shallow water. The plants and animals that live on and in marine sediments create highly heterogeneous conditions that strongly influence ecosystem functions and how marine ecosystems drive and respond to change. Seafloor biodiversity is a key mediator of ecosystem functioning, but its role is often excluded from global budgets or simplified to black boxes in ecosy

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Garside, Emily. Seasons of Love. Globe Pequot, the trade division of The Rowman & Littlefield Publishing Group, Inc., 2023. https://doi.org/10.5040/9798765148006.

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With its groundbreaking score, unabashed romanticism, and scrappy sensibility, Rent was like a firecracker thrown into a hushed theater, turning heads and upending conventions. But if its unexpected success was the stuff of theatrical legend, the story of its making was a bittersweet one, with composer Jonathan Larson, a student of Sondheim's finally making his Off-Broadway debut, tragically dying on the night of the final dress rehearsal. Even decades later, Rent lives on as a warmly remembered chapter in Broadway history, yet the show is too often trivialized, reduced to parody, or dissected

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Anderson, Eric C. China Restored. ABC-CLIO, LLC, 2010. http://dx.doi.org/10.5040/9798400625671.

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Contrary to lurid forecasts in the West that China is on track to wrest global hegemony from the United States by 2025, China is in fact positioning itself to resume its historic role as the “Middle Kingdom”—a senior mentor with benign aspirations for guiding Asia into the mid-21st century. In China Restored: The Middle Kingdom Looks to 2020 and Beyond, Eric C. Anderson challenges the widespread perception of China as a rising giant whose authoritarian program to supplant the United States as global hegemony poses a grave international threat. He weighs in against doomsday prophets such as Mar

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Foote, John H. Clint Eastwood. Greenwood Publishing Group, Inc., 2008. http://dx.doi.org/10.5040/9798400627590.

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Now a two-time Academy Award winner for best director, twice winner of the Directors Guild of America Award for best director, and recipient of countless other critics prizes and nominations in multiple capacities, Clint Eastwood stands alongside Martin Scorsese and Steven Spielberg as one of the finest directors working in modern cinema. Here, John Foote examines the long, impressive, and unlikely film career of a man who fought against expectations to forge his own way and become one of this generation's finest filmmakers. Each chapter examines a different film, beginning with Play Misty for

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Book chapters on the topic "Margin design influence"

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Ono, Shunsuke, and Namgyu Kang. "Proposal of System Based on Kansei Evaluation of Influence of the Margin Ratio of Plates." In Advances in Industrial Design. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51194-4_90.

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Zhai, Yan-wei, Ding-guo Jiang, Guo-liang Ji, and Zhen-yu Lv. "Study on the Impact of Flood Season Operating Water Level on Flood Control of the Three Gorges Reservoir." In Lecture Notes in Civil Engineering. Springer Nature Singapore, 2024. http://dx.doi.org/10.1007/978-981-97-9184-2_9.

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AbstractClimate change has resulted in an increase in extreme weather events, with a sharp rise in droughts and floods. To establish a long-term mechanism for ensuring the safe operation of the Three Gorges Project, it is imperative to utilize hydrodynamic methods to analyze the water level operation mode during the flood season. This is crucial to enhancing the flood control safety and maximizing the overall benefits of this project. Therefore, this study obtained four different frequency design flood processes for each year by utilizing data from typical years. And the influence of different

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Linkevičius, Tomas. "How Abutment Margin Design Influences Cement Flow: Abutment Selection and Cement Margin Site." In Cementation in Dental Implantology. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-55163-5_6.

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Huang, Shao Hui, Revadhi Chelvarajah, Lessandra Y. S. Chee, Ezra Hahn, and Brian O’Sullivan. "The Evolving Landscape of Prognostic Factors in HPV-Related Oropharynx Cancer." In Critical Issues in Head and Neck Oncology. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-84539-0_15.

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Abstract Risk-tailored approaches are the backbone of contemporary clinical research and treatment in oncology. Attention to risk-stratification model development, especially concerning the choice and emphasis of prognostic factors to include in a model, is essential to understanding prognosis and implementing strategies to advance treatment, e.g. selecting patients for differing treatments or strategies for exploration in clinical trials, including defining eligibility for trials and determining useful stratifications in the design of randomised controlled trials. Prognostic factors can be cl

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Stania, Lennart, and Joerg R. Seume. "Regeneration-Induced Variances of Aeroelastic Properties of Turbine Blades." In Regeneration of Complex Capital Goods. Springer International Publishing, 2024. http://dx.doi.org/10.1007/978-3-031-51395-4_15.

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AbstractRegeneration and wear result in geometric deviations between design intent and reality of turbine blades. These deviations influence the aerodynamic flow field and the aeroelastic behaviour of downstream blades. As an example for the effect of such deviations between modules on blade vibration amplitudes, an experiment is set up to determine the influence of cold streaks, which can occur due to widening of cooling air holes. The vibration amplitude for an off-design point is increased by 20% and for the design point as well. We conclude that the forced response caused by cooling air fr

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Saydam, A. Z., G. N. Küçüksu, M. İnsel, and S. Gökçay. "Investigation of the influence of wind-assisted propulsion devices on hull design." In Sustainable Development and Innovations in Marine Technologies. CRC Press, 2022. http://dx.doi.org/10.1201/9781003358961-27.

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Rodrigues, M. I. P., S. Wang, and C. Guedes Soares. "Analysis of forward speed influence on vertical bending moment uncertainty in S175 containerships." In Innovations in the Analysis and Design of Marine Structures. CRC Press, 2025. https://doi.org/10.1201/9781003642411-4.

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Georgiadis, D. G., M. S. Samuelides, S. Li, D. K. Kim, and S. Benson. "Influence of stochastic geometric imperfection on the ultimate strength of stiffened panel in compression." In Developments in the Analysis and Design of Marine Structures. CRC Press, 2021. http://dx.doi.org/10.1201/9781003230373-11.

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Yu, T. Q., K. Liu, X. F. Wang, H. W. Liu, and G. Wang. "Study on the modification and application of RTCL criterion considering the influence of mesh size." In Advances in the Analysis and Design of Marine Structures. CRC Press, 2023. http://dx.doi.org/10.1201/9781003399759-39.

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Le Sourne, H., J. P. Pineau, C. B. Umunnakwe, T. Wesoly, and O. Dorival. "On the influence of buoyancy forces, failure strain and friction coefficient on the damage extent of a grounded ship." In Developments in the Analysis and Design of Marine Structures. CRC Press, 2021. http://dx.doi.org/10.1201/9781003230373-27.

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Conference papers on the topic "Margin design influence"

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Massardo, Aristide, and Antonio Satta. "Axial Flow Compressor Design Optimization: Part I — Pitchline Analysis and Multivariate Objective Function Influence." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-201.

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The design of an axial flow compressor stage has been formulated as a nonlinear mathematical programming problem with the objective of minimizing the aerodynamic losses, and the weight of the stage while, maximizing the compressor stall margin. Aerodynamic as well as mechanical constraints are considered in the problem formulation. A method of evaluating the objective function and constraints of the problem with a pitchline analysis is presented. The optimization problem is solved by using the penalty function method in which the Davidon-Fletcher-Powell variable metric minimization technique i

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Rozendaal, Alexander V., Alex Torkaman, and Stephen W. Fiebiger. "Numerical Investigation on the Influence of Tip Shroud Design Characteristics on the Aerodynamic Damping of a Last Stage Blade." In ASME Turbo Expo 2021: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/gt2021-58766.

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Abstract The accurate predication of aerodynamic flutter margin continues to be an area of growing importance in the design of rotating turbomachinery, especially when considering the ongoing industry objectives for increased operating efficiency, higher power output, and reduced fuel consumption. Improvements in these areas are commonly achieved through incremental design changes to existing hardware, and often trend with higher pressure ratios and mass flow rates through the machine. In many cases, the extent of these flow improvements become constrained by the stability margins of flutter-l

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Morita, Ryo, Fumio Inada, Yasuki Ohtori, et al. "Statistical Analysis of Seismic Effects of Low Seismic Class Equipment Based on Damage Data of Nuclear Power Plants." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28644.

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Structural strengths of the piping and components in NPPs have been designed with seismic margin. They are classified seismically S, B and C class in terms of the influence rate to nuclear safety. For the highest seismic class (Class S) equipment, it is clarified that they have enough seismic margins against design seismic conditions by shaking table tests or numerical simulations. However, for the lower seismic class (Class B and C) equipment, their seismic margins have not been clarified quantitatively. In this paper, in order to evaluate seismic robustness of the lower seismic class equipme

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Yu, Peng, Ningxi Jia, Qiang Guo, Zhuo Liu, Yu Jin, and Yidan Yuan. "A Numerical Study of the Spray Cooling Effect on Improving the IVR Safety Margin." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-89870.

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Abstract In-vessel retention (IVR) is a widely adopted severe accident mitigation strategy in the advanced commercial PWRs. External water cooling on the outer surface of the reactor pressure vessel (RPV) is designed to efficiently remove the decay heat from the in-vessel corium, such that the RPV integrity can be kept and the radioactive corium retained inside. The effectiveness of the IVR strategy requires that the maximum heat flux along the RPV lower than the critical heat flux (the switch point from nucleate boiling to film boiling). In existing engineering design, water cooling is realiz

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Lv, Xingbing, Shuangyang Liu, Hongyang Zhang, and Run Lin. "Margin Analysis of Conventional Island Under Beyond Design Basis External Flooding Scenario for NPP." In 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-92151.

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Abstract Since the external flooding caused by the earthquake and tsunami at Fukushima Daiichi nuclear power plant in Japan, the waterproofing ability of the nuclear power plants, in operation or under construction, has attracted widespread attention from nuclear safety authorities and the public all over the world. While less attention was paid to the conventional island area. The failure of systems and components arranged in the conventional island may lead to the turbine out of the normal operation and impact the operation reliability of the unit, which would influence the generating capaci

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Maddulapalli, Anil Kumar, Parameshwaran S. Iyer, and N. R. Srinivasa Raghavan. "Selecting and Optimizing a Regulation Compliant Robust Vehicle Portfolio Mix: An Approach and a Case Study." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70832.

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Our goal is to select a robust vehicle portfolio mix and optimize its design attributes such that contribution margin is maximized while being regulation compliant under varying fuel prices. Compliance to regulation is measured in terms of the Corporate Average Fuel Economy or CAFE. We formulate this vehicle portfolio optimization problem as a mixed integer non-linear programming problem, both under static and varying fuel price scenarios. We demonstrate our approach using a case study in which an in-house market simulator is employed for incorporating consumer preferences in portfolio decisio

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Shibata, Takanori, Manabu Yagi, Hideo Nishida, Hiromi Kobayashi, and Masanori Tanaka. "Effect of Impeller Blade Loading on Compressor Stage Performance in a High Specific Speed Range." In ASME Turbo Expo 2010: Power for Land, Sea, and Air. ASMEDC, 2010. http://dx.doi.org/10.1115/gt2010-22281.

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The authors previously found that compressor stage efficiency in a high specific speed range was significantly improved by employing an increased relative velocity diffusion ratio coupled with a high backsweep angle. In spite of such a high relative velocity diffusion ratio, the same surge margin as with a conventional design could be achieved by using a special front loading distribution with a lightly loaded inducer. In the present study, the blade loading distribution was further optimized in order to achieve a larger surge margin than previously. Four types of fully shrouded impellers were

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Mileshin, V. I., V. V. Zhdanov, and A. M. Petrovitchev. "Numerical and Experimental Investigation As Applied to Effects of Labyrinth-Type Casing Treatments on Performance of High-Loaded Compressor First Stage." In ASME Turbo Expo 2018: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/gt2018-76894.

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In connection with the development of a new family of high-pressure HPC with ultra-high pressure ratio and the number of stages 10–11, a special attention should be paid to the development of the first high-load stage, because compressor performance directly depends on its excellence. Despite the fact that the stage at nominal rotational speeds can have optimal performance, stall margins at intermediate rotational speeds can decrease because of a sizable IGV closure. One of the ways to increase stall margins is the use of labyrinth-type casing treatments. The Stage “A-1” studied in this work i

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Kasina, Lakshman, Raghavan Kotur, and Govindaraji Gnanasundaram. "Minimum Weight Design of Aero Engine Turbine Disks." In ASME 2015 Gas Turbine India Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gtindia2015-1250.

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The aero engine rotating parts are always fracture critical components and their failure in service affects the aircraft safety. Rotors / disks will burst at a certain speed if they operate at ever-increasing speed. Rotor burst is one of important failure mode in aero engine and resulting in disk disintegration into multiple fragments with high speed resulting in containment breach. Disks are subjected to fatigue loading and it limits the service life. Fatigue loading on disk includes high temperature environment, tremendous centrifugal and aerodynamic forces caused by blades. The main aspect

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Goinis, Georgios, and Eberhard Nicke. "Optimizing Surge Margin and Efficiency of a Transonic Compressor." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-57896.

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It has been shown in several cases that casing treatments can improve the surge margin of a compressor. The question that is often left unanswered when designing and optimizing a casing treatment for a given compressor stage is whether the casing treatment can still improve the performance and surge margin when used on an aerodynamically improved rotor. The current work includes the influence of the rotor geometry and casing geometry in the analysis. Several optimizations with equal objectives, to improve surge margin and efficiency, were performed. First the different components were optimize

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Reports on the topic "Margin design influence"

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Bonet-Morón, Jaime, Jhorland Ayala-García, and Jorge Guerra-España. Staying in Power: How Does Political Continuity Shape Debt? Banco de la República, 2024. https://doi.org/10.32468/dtseru.331.

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This paper investigates the relationship between political continuity and public municipal debt in Colombia, highlighting how political cycles influence fiscal behavior at the subnational level. Unlike national cycles, local political dynamics, marked by consecutive electoral victories of the same party, significantly impact fiscal policy and debt accumulation. Using a Kink Regression Discontinuity design, we explore the effects of these electoral outcomes on public financial debt. Our findings reveal that municipalities governed by the same party or coalition across successive elections exhib

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Chambers-Ju, Christopher, Amanda Beatty, and Rezanti Putri Pramana. Exploring the Politics of Expertise:The Indonesian Teachers’ Union and Education Policy, 2005-2020. Research on Improving Systems of Education (RISE), 2022. http://dx.doi.org/10.35489/bsg-rise-wp_2022/101.

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Research on education politics often uses interest group pressure to explain the policy influence of teachers’ organizations. While acknowledging the power teachers’ unions have to articulate interests and shape labor policy, we explore how a less-studied variable–expertise (or the credibility of the claims they make to expertise)– shapes the policy process. In many low-and middle-income countries, teacher organizations struggle to demonstrate policy expertise and professional competence in core areas related to teaching and learning. Focusing on Indonesia from 2005-2020, we examine how the la

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Dogra, Keshav, Sebastian Heise, Edward S. Knotek, et al. Estimates of cost-price passthrough from business survey data. Federal Reserve Bank of Cleveland, 2023. http://dx.doi.org/10.26509/frbc-wp-202314.

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We examine businesses' price-setting practices via open-ended interviews and in a quantitative survey module with business contacts from the Federal Reserve Banks of Atlanta, Cleveland, and New York in December 2022 and January 2023. Businesses indicated that their prices were strongly influenced by demand, a desire to maintain steady profit margins, and wages and labor costs. Survey respondents expected reduced growth in costs and prices of about 5 percent on average over the next year. Backward-looking, forward-looking, and hypothetical scenarios reveal average cost-price passthrough of arou

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Bryant, Duncan, and Leigh Provost. Walter Marine and Atlantic Reefmaker Wave Attenuator : wave transmission testing results. Engineer Research and Development Center (U.S.), 2022. http://dx.doi.org/10.21079/11681/43303.

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As part of a testing service agreement with Walter Marine and Atlantic Reefmaker, a 1:5.2 physical model of the Reefmaker Wave Attenuator was constructed and tested by the US Army Engineer Research and Development Center to evaluate its influence on wave attenuation. The tested prototype wave periods ranged from 2.5 to 8 sec with prototype wave heights between 1 ft and 6.5 ft. The Reefmaker Wave Attenuator included orthogonal and square designs and was tested under a variety of configurations including a suspended configuration, a bed-mounted configuration, and a rotated configuration. Testing

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McDonald, Jacob, and M. Gregory. Back barrier erosion monitoring at Cumberland Island National Seashore: 2018 data summary—Version 2.0. National Park Service, 2019. https://doi.org/10.36967/2259083.

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In 1999, the National Park Service’s (NPS) Inventory and Monitoring (I&M) Program (now I&M Division) substantially expanded a pilot long-term ecological monitoring program known as “Vital Signs Monitoring” to cover more than 270 parks. The program was designed to provide the minimum infrastructure required to identify and monitor the conditions of the highest priority resources within the National Park System (Fancy et al. 2009). The Southeast Coast Network (SECN) was one of thirty-two networks formed to implement the I&M Division’s program and is tailored to the specific needs of

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Merk, Christine, Gisle Andersen, and Endre Tvinnereim. Report on public perceptions in cross-country survey. OceanNets, 2023. http://dx.doi.org/10.3289/oceannets_d3.5.

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This deliverable synthesizes the first results on public perceptions of marine Carbon Dioxide Removal (CDR) methods from a cross-country survey in Canada, China, France, Germany, Norway, and Taiwan. The purpose is to inform the other work packages in OceanNets and stakeholders about our results in a timely and brief manner about the ways members of the public view marine CDR specifically. The survey was fielded in April 2023, has approximately 2000 observations in each country, and aims to be representative for the population active online in the respective country. It covers the marine CDR ap

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Ndubuaka, Kachi. PR676-233801-R09 Pipe Vulnerability Analysis Methodology. Pipeline Research Council International, Inc. (PRCI), 2025. https://doi.org/10.55274/r0000142.

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Continuous buried pipelines are generally required to traverse long distances and as such, inevitably pass through unstable landforms which may impart critical levels of stress beyond the intrinsic capacity of the pipelines. The deformational response of buried pipelines subject to relative ground movement is strongly influenced by the geotechnical properties of the immediate backfill and surrounding soil, the size and direction of the soil movement in which the pipeline is embedded, as well as mechanical soil-pipe interaction behavior. With respect to the mode of deformation, relative ground

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Bartolino, Valerio, Birgit Koehler, and Lena Bergström, eds. Climate effects on fish in Sweden : Species-Climate Information Sheets for 32 key taxa in marine and coastal waters. Department of Aquatic Resources, Swedish University of Agricultural Sciences, 2023. http://dx.doi.org/10.54612/a.4lmlt1tq5j.

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The purpose of this publication is to summarize the state of knowledge on the effects of environmental variability and climate change for individual species and stocks based on literature review, giving species-climate information for 32 key taxa in Swedish marine and coastal waters. The report is written in English. The extent and scale of recent changes in climate due to global warming is unprecedented and causes increasing effects on ecosystems. In oceans, ongoing warming leads to, for example, increased water temperatures, decreased ice cover and effects on hydrology and water circulation

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RESEARCH PROGRESS ON FATIGUE PROPERTIES OF THE HIGHPERFORMANCE STEEL AND CONNECTION FORMS. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.196.

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This paper reviews the current research status of fatigue performance of high-strength steels, introduces the basic theory of fatigue life and current design methods, the fatigue test data of a large number of high-strength steels are statistically collected, and the fatigue properties of high-strength steel base material and different connection structures are analyzed and evaluated. The research results show that high-strength steels with yield strength greater than 420MPa show better fatigue resistance, and the fatigue strength is significantly higher than the calculated value. The design c

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ELASTIC BUCKLING OF OUTSTAND STAINLESS-CLAD BIMETALLIC STEEL PLATES SUBJECTED TO UNIAXIAL COMPRESSION. The Hong Kong Institute of Steel Construction, 2022. http://dx.doi.org/10.18057/icass2020.p.274.

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The application of stainless-clad (SC) bimetallic steel in various conditions such as offshore and marine environment requires members designed in different cross-sectional shapes, which consist of both internal and outstand elements. To form a comprehensive understanding of buckling behaviour of the SC bimetallic steel members, the behaviour of outstand compression plates needs to be investigated. In this study, the theoretical elastic buckling stress of outstand SC bimetallic steel plates subjected to uniformly distributed uniaxial compression is derived. Considering the position of neutral

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