Готові списки джерел за темами / Circle with pockets

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Добірка наукової літератури з теми "Circle with pockets"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Circle with pockets"

Braun, M. J., and M. Dzodzo. "Effects of Hydrostatic Pocket Shape on the Flow Pattern and Pressure Distribution." International Journal of Rotating Machinery 1, no. 3-4 (1995): 225–35. http://dx.doi.org/10.1155/s1023621x95000091.

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The flow in a hydrostatic pocket is numerically simulated using a dimensionless formulation of the 2-D Navier-Stokes equations written in primitive variables, for a body fitted coordinates system, and applied through a collocated grid. In essence, we continue the work of Braun et al. 1993a, 1993b] and extend it to the study of the effects of the pocket geometric format on the flow pattern and pressure distribution. The model includes the coupling between the pocket flow and a finite length feedline flow, on one hand, and the pocket and its adjacent lands on the other hand. In this context we shall present, on a comparative basis, the flow and the pressure patterns at the runner surface for square, ramped-Rayleigh step, and arc of circle pockets. Geometrically all pockets have the same footprint, same lands length, and same capillary feedline. The numerical simulation uses the Reynolds number based on the lid(runner) velocity and the inlet jet strengthFas the dynamic similarity parameters. The study aims at establishing criteria for the optimization of the pocket geometry in the larger context of the performance of a hydrostatic bearing.

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WOŚ, Sławomir, Waldemar KOSZELA, and Paweł PAWLUS. "THE EFFECT OF THE SHAPE OF OIL POCKETS ON THE FRICTION FORCE." Tribologia 280, no. 4 (August 1, 2018): 151–56. http://dx.doi.org/10.5604/01.3001.0012.7556.

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Tests were carried out using a pin-on-disc tester under starved lubrication conditions. To achieve a conformal contact, a special construction was used with an adjustable counter sample. Textured surfaces with two dimple patterns (spiral an radial) and four shapes (circle, oval, triangle, and chevron) were tested. The contact area was lubricated with L-AN-46 oil. Before the tests, surface topographies of the discs were measured by a white light interferometer Talysurf CCI Lite. Tests showed that, in starved lubrication conditions, oil pocket shape and pattern affected the friction force.

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Nguyen, Thai Hong, and Nguyễn Duy Long. "A new design of the Lobe pump is based on the meshing principle of elliptical gear pairs." Science & Technology Development Journal - Engineering and Technology 4, no. 2 (March 6, 2021): first. http://dx.doi.org/10.32508/stdjet.v4i2.769.

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The paper presents a new rotor design of an external coupling Lobe pump driven by pair of elliptical gears. The new rotor is a four-tooth elliptical gear with tooth profile is a improve cylocid curve. The improve cylocid curve is the locus of the fixed point on the generation circle, when the circle a pure rolling without slipping on the elliptical centrode of the rotor. The conditions of the rotor addendum and dedendum profiles are also considered. The limited supply angle addendum and dedendum rotor profiles are determined through an iterative algorithm when the generation circle makes a pure rolling without slipping on the ellipse base of the rotor. From there, we proceed to determine the pump design parameters according to the characteristic design parameters forming the rotor profile. The flow rate of the pump is determined by the area of the pockets on a cross-section perpendicular to the pump shaft. On that basis, a Matlab program is written from the mathematical model established by the paper to calculate the rotor design. In addition, the paper also investigates the effect of the coefficient l (semi-major axis divided semi-minor axis of the elliptical centrode ) on the average flow and axis distance. Survey results show that the design at l = 0.5 flow is 52.17% larger and the axis distance is reduced by 21.43% when compared to the traditional design at l = 1. This is the advantage of the new design proposed by this study.

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Dey, Sudip, Chandrani Debbarma, Prasamita Sarkar, and Sushmita Paul. "Geo-electrical mapping and groundwater potential zoning in some selected pockets of Baromura hill of Tripura (India)." Journal of Applied and Natural Science 2, no. 2 (December 1, 2010): 207–12. http://dx.doi.org/10.31018/jans.v2i2.121.

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Baromura hill of Tripura is characterised by complex geology and very rugged landform. Water scarcity is a very general problem for the remote hilly villages of this area. Thus groundwater is considered as one of the most valuable natural resources in hilly villages of Baromura hill. The present study aims to prepare small area survey based geo-electrical mapping for understanding groundwater condition in some selected pockets of the study area. For that purpose one hill slope and one trough shaped low land (locally known as lunga) was selected. Soil resistivity meter was used for electrical survey. A circle plot was prepared for geo-electrical survey on the basis of which geo-electrical maps were drawn. In the studied hill slope morphology four sectors of ground water conditions were observed according to their electrical resistivity character namely shallowest zone, medium zone, deep zone and very deep zone. The trough shaped low land (lunga) is characterised by comparatively shallower condition of groundwater and it was divided into five classes namely near surface water, very shallow zone, shallow zone, medium shallow zone and medium zone. Though the depth of the water bearing strata cannot be detected by this method it is very suitable for understanding the groundwater potential zones in remote places like present study area.

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Iqbal, Dr Zeenat, and Mohd Aamir Mirza. "Unraveling the Etiology of Periodontitis." International Journal of Biomedical Investigation 4, no. 1 (June 30, 2021): 1–4. http://dx.doi.org/10.31531/2581-4745.1000131.

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Across the globe, incidence of oral afflictions like gingivitis and periodontitis are increasing at a very fast pace. Evidencearethere to support the fact that despite of being an oro-dental infection, periodontitis is associated with the systemic diseases too. Different ecological niches of oral cavity can harbor both pathogenic and non-pathogenic micro-organisms. Although the main cause of the disease is the anaerobic or the facultative anaerobic bacteria, other factors such as poor personal hygiene, diet and immune related disorders are also responsible for the progression of the disease. The vicious circle starts from deposition of the bacterial plaque/biofilm on the tooth surface then leading to gingivitis. If left untreated, it progresses to the development of periodontal pockets and ultimately tooth loss. However traditional treatment modalities like high dose of systemic antibiotics are available but antimicrobial resistance and virulence of the periodontal pathogens is the major cause of the treatment failures. This review primarily focuses on the etiology, pathogenesis and microbiology of the periodontitis. It also discusses the virulence and antimicrobial resistance factors of the periodontopathic micro-organisms. It is an attempt to develop the thorough understanding of the disease so that better therapeutic outcomes of periodonto-therapy can be attained.

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Jha, Yatindra Kumar. "Government Schemes and Its Implementation on Poverty Alleviation : A Special Study of U.P. Urban Areas in India." Think India 22, no. 3 (September 26, 2019): 109–26. http://dx.doi.org/10.26643/think-india.v22i3.8083.

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Urban poverty alleviation is the major thrust of development planning in India. However, poverty eradication is a daunting task as the problem is gradually increasing due to migration of rural poor people in urban centres. Urban poverty is a major challenge before the urban managers and administrators of the present time. Though the anti-poverty strategy comprising of a wide range of poverty alleviation and employment generating programmes has been implemented but results show that the situation is grim. Importantly, poverty in urban India gets exacerbated by substantial rate of population growth, high rate of migration from the rural areas and mushrooming of slum pockets. Migration alone accounts for about 40 per cent of the growth in urban population, converting the rural poverty into urban one. Moreover, poverty has become synonymous with slums. The relationship is bilateral i.e. slums also breed poverty. This vicious circle never ends. Most of the world’s poor reside in India and majority of the poor live in rural areas and about one-fourth urban population in India lives below poverty line. If we count those who are deprived of safe drinking water, adequate clothing, or shelter, the number is considerably higher. Moreover, the vulnerable groups such as Scheduled Castes, Scheduled Tribes, minorities, pavement dwellers etc., are living in acute poverty. Housing conditions in large cities and towns are depicting sub human lives of slum dwellers. With the reconstruction of poverty alleviation programmes in urban India, it is expected that social and economic benefits will percolate to the population below the poverty line. However, eradication of poverty and improving the quality of life of the poor remain one of the daunting tasks. Government of India has introduced numerous centrally sponsored schemes from time to time. Rajiv Awas Yojana, Rajiv Rin Yojana and National Urban Livelihood Mission are the new addition for poverty alleviation in urban area.

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Pateloup, Vincent, Emmanuel Duc, and Pascal Ray. "Bspline approximation of circle arc and straight line for pocket machining." Computer-Aided Design 42, no. 9 (September 2010): 817–27. http://dx.doi.org/10.1016/j.cad.2010.05.003.

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Polzer, Ales, Vit Sebesta, and Tomas Trcka. "5-AXIS DRY MILLING OF BOTTOM OF POCKET BY BALL AND CIRCLE-SEGMENT END MILLS." MM Science Journal 2020, no. 1 (March 4, 2020): 3740–44. http://dx.doi.org/10.17973/mmsj.2020_03_2019153.

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WU, Shixiong, Wei MA, Haiping BAI, Chengyong WANG, and Yuexian SONG. "Engagement Angle Modeling for Multiple-circle Continuous Machining and Its Application in the Pocket Machining." Chinese Journal of Mechanical Engineering 30, no. 2 (March 2017): 256–71. http://dx.doi.org/10.1007/s10033-017-0092-6.

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Pllana, Gani, and Sadete Pllana. "Extracts of Terminology Lexicons Types in Level of Concept Expression." European Journal of Language and Literature 9, no. 1 (June 10, 2017): 137. http://dx.doi.org/10.26417/ejls.v9i1.p137-142.

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It can be emphasized that depending on the types of human activities, whether is that common, simple or high, the types of lexical language units function, moving from one conceptual level to the other according to the need of the communication necessities presented in front of the language. It can be noticed clearly, not rarely, in technical communication, as in other communications, and particularly in this case, the same sign as a lexical unit that expresses a common concept of wide content can also indicate a concept of a special content , restricted to its use and known by a narrow circle of users of the language, as it can be said for foot (man) and foot (mineral), pocket (coat) and pocket (petroleum), horn (animal) and horn (anvil). In this case, with the highest level in which the word rises, a modified concept of a lower or higher degree is also associated comparing with the meaning of the unit it’s coming from, for example, pocket (higher), compared to pocket (coat) (lower). In another case, raising the word to a higher level can only be considered as a transition to another level, but more or less of the same conceptual content. This type of concept, which is also called a dual concept (Duro, 1983: 113), makes the same unit to elevate to the highest level, in addition to the concept that expresses as: door1 (common word) and door1.1 . (building), window1 (house) and window1.1. (buildings), as a special common unit and of construction field.

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Дисертації з теми "Circle with pockets"

Анциферова, Олеся Олександрівна. "Технологічне забезпечення точності та якості поверхонь зубчастих коліс при удосконаленні методу зубошліфування". Thesis, НТУ "ХПІ", 2018. http://repository.kpi.kharkov.ua/handle/KhPI-Press/38013.

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Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.02.08 – технологія машинобудування. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2018. Дисертацію присвячено вирішенню проблеми підвищення продуктивності процесу зубошліфування на основі досягнення високої необхідної точності і якості поверхневого шару з оцінкою комплексного впливу конструктивно-технологічних факторів на процес формування поверхневого шару зубів зубчастих коліс з метою підвищення їх зносостійкості, а також продуктивності технологічного процесу в оптимальних виробничих умовах. Отримала подальший розвиток теоретико-експериментальна залежність формоутворення якості поверхневого шару та способу переривчастого зубошліфування, яка відрізняється врахуванням геометричних параметрів переривчастого кругу, що дозволило прогнозувати експлуатаційні властивості зубчастих коліс. Удосконалені технологічні засоби стабілізації оптимальних режимів переривчастого зубошліфування, які дозволяють підвищити якість обробки зубчастих коліс. Встановлена закономірність зменшення засалювання переривчастого зубошліфувального кругу та температури у зоні контакту, яке впливає на забезпечення експлуатаційних властивостей поверхонь зубів.
Thesis for scientific degree of Candidate of Technical Sciences on speciality 05.02.08 − Manufacturing Engineering. − National Technical University "Kharkiv Polytechnic Institute", Kharkiv, 2018. The dissertation is devoted to solving the problem of increasing the productivity of the process of grinding on the basis of achieving the high required accuracy and quality of the surface layer with an assessment of the complex influence of structural and technological factors on the formation of the surface layer of teeth of gear wheels in order to increase their wear resistance, as well as the productivity of the technological process in optimal production conditions. The theoretical and experimental dependence of the formation of the quality of the surface layer and the method of intermittent gear grinding has been further developed, which differs from the geometric parameters of the discontinuous circle, which allowed predicting the operational properties of the gears. Improved technological means of stabilizing optimal modes of intermittent gear grinding, which allow to improve the quality of machining of gear wheels. The regularity of reduction of salting of intermittent gear grinding wheels and temperature in the contact zone is established, which affects the maintenance of the operational properties of tooth surfaces.

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Книги з теми "Circle with pockets"

The looking book: A pocket history of Circle Press 1967-96. London: Circle Press, 1997.

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Liberto, Lorenzo. Practice makes perfect. Las Cruces, N.M: Harvest Sun Press, 2004.

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Gibson, CR. Circle Game Bound Pocket Page Album. CR Gibson, 2005.

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Certification Circle: Microsoft Office XP Quick Reference Pocket Guide (Certification Circle). Course Technology, 2002.

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Gibson, CR. Circle Game Mini Pocket Page Photo Album. CR Gibson, 2005.

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Hagstrom 75-mile Radius Map from Columbus Circle, New York City Pocket Map. Hagstrom Map Co., 2007.

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Moore's pocket almanack, calculated for the year of Our Lord, MDCCXCII: To which is added a general companion, or register, of the provinces of Upper and Lower Canada, as at present divided into districts and circles : containing the officers of government .. Quebec (City): Printed by William Moore ..., 1986.

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Частини книг з теми "Circle with pockets"

Bird, John. "Circles." In Mathematics Pocket Book for Engineers and Scientists, 106–11. Routledge, 2019. http://dx.doi.org/10.1201/9780429294402-38.

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"The circle and its properties." In Newnes Engineering Mathematics Pocket Book, 99–102. Routledge, 2012. http://dx.doi.org/10.4324/9780080497440-24.

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Malcolm, Noel. "Pjetër Bogdani’s Cuneus prophetarum (1685)." In Rebels, Believers, Survivors, 110–27. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198857297.003.0006.

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This essay investigates the background and nature of the most important early work written and printed in Albanian, Archbishop Pjetër Bogdani’s theological treatise Cuneus prophetarum. Evidence from Bogdani’s correspondence suggests that he was working on what became the second part of this large book, the part describing the life of Christ, in the mid-1670s. Possibly this derived from sermons which he had given to his flock (in present-day Kosovo). Gradually he expanded the project, adding arguments which were directed against both Orthodox Christianity and Islam. The intellectual context of this was a circle of theologians in Rome (identified here) who were engaged in conversionary work, both against those faiths and against Judaism. Conversion was, however, at most a secondary aim for Bogdani, who was writing primarily for his own Catholic flock. But his project was taken up by Cardinal Gregorio Barbarigo in Padua, who eventually published the book in 1685, and for Barbarigo the conversion of Muslims was a major aim, linked to aspirations for the conquest of the Ottoman Empire. Barbarigo was also keen to display the capabilities of his newly established printing press; this explains why Bogdani’s text, which would ideally have been produced in a pocket-sized edition suitable for covert transmission inside the Ottoman Empire, appeared as a grand, illustrated folio volume, with passages in languages such as Syriac and Armenian. Bogdani’s project had, it is argued, been taken over and used for other purposes.

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Тези доповідей конференцій з теми "Circle with pockets"

Costa, H. L., and I. M. Hutchings. "Lubricated Sliding Wear of Textured Surfaces." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63819.

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In this paper, the effects of some geometric characteristics of surfaces textured by photochemical etching on their lubricated sliding behaviour were analysed. Reciprocating tests with sinusoidal velocity variation against cylindrical counterbodies were used. An estimate of the lubricant film thickness was obtained from capacitance measurements. Values of film capacitance, film thickness and coefficient of friction were computed as a function of sliding velocity, averaged over a large number of consecutive strokes after the running-in period. Patterns composed of circles with different fractions of coverage of the surface were tested for different ratios between the width of the individual pockets and the contact width. All the results were compared with those from a standard polished surface.

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Fu, Qiang, and Zezhong C. Chen. "Medial Axis Transform of Planar Shapes With Free-Form Curve Boundary." In ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/detc2010-28903.

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Medial axis transform (MAT) is a very useful shape interrogation tool in NC tool path generation for pocket milling. This paper presents a new, efficient approach to calculating MATs of planar profiles with boundaries of free-form curves. The proposed approach is mainly based on profile boundary tracing and decomposition. By studying the basic elements of MAT and their geometric properties, several algorithms of finding contact circles are developed. The boundary tracing algorithm can handle profiles with/without internal holes. For a profile without internal holes, it is continuously divided into simpler sub-profiles while travelling along the boundary, and a tree data structure is adopted to keep track of the boundary decomposition process. For a profile with internal holes, it is divided into several simple profiles without internal holes. After generating the MAT of each simple profile, the completed MAT can be found by combining these MATs. This proposed approach is implemented and some illustrative samples are presented to demonstrate its advantages.

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