Готові списки джерел за темами / Coefficient of resistance

Добірка наукової літератури з теми "Coefficient of resistance"

Автор: Grafiati

Опубліковано: 13 вересня 2021

Оновлено: 13 лютого 2022

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Статті в журналах з теми "Coefficient of resistance":

赵, 振国. "Study on Resistance Coefficient." International Journal of Fluid Dynamics 04, no. 01 (2016): 8–18. http://dx.doi.org/10.12677/ijfd.2016.41002.

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Fox, John N. "Temperature coefficient of resistance." Physics Education 25, no. 3 (May 1, 1990): 167–69. http://dx.doi.org/10.1088/0031-9120/25/3/411.

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Zhang, Mei Jie, Hou Zhi Wang, Hua Zhi Gu, and Ao Huang. "Analysis on Resistance Coefficients and Optimization of Structure and Properties of Porous Permeable Refractory." Key Engineering Materials 368-372 (February 2008): 1155–57. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.1155.

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The resistance coefficients through which gas flow permeable refractory are important properties and have great effect on the gas blowing parameters and gas-liquid two phase flowing characteristics in the metallurgy furnace such as ladles, tundish. In this paper, the resistance coefficients were measured according to the Forchheimer’s law. The results show when the gas flow rate is fixed, the viscosity resistance coefficient and inertia resistance coefficient decrease as the apparent porosity and average pore diameter increase. The viscous resistance coefficient is more lager than the inertial resistance coefficient. The resistance coefficients were analyzed by dimensional analysis and the statistical correlations between the resistance coefficients and parameters of porous permeable refractory were got based on the experimental data. In order to get high strength at low resistance coefficients, the raw materials particle degree were adjusted.

Lhomme, J. P., N. Boudhina, and M. M. Masmoudi. "Technical Note: On the Matt–Shuttleworth approach to estimate crop water requirements." Hydrology and Earth System Sciences Discussions 11, no. 4 (April 14, 2014): 4217–33. http://dx.doi.org/10.5194/hessd-11-4217-2014.

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Abstract. The Matt–Shuttleworth method provides a way to make a one-step estimate of crop water requirements with the Penman–Monteith equation by translating the crop coefficients, commonly available in FAO publications, into equivalent surface resistances. The methodology is based upon the theoretical relationship linking crop surface resistance to crop coefficient and involves the simplifying assumption that the reference crop evapotranspiration (ET0) is equal to the Priestley–Taylor estimate with a fixed coefficient of 1.26. This assumption, used to eliminate the dependence of surface resistance on certain weather variables, is questionable: numerical simulations show that it can lead to substantial differences between the true value of surface resistance and its estimate. Consequently, the basic relationship between surface resistance and crop coefficient, without any assumption, appears to be more appropriate for inferring crop surface resistance, despite the interference of weather variables.

Lhomme, J. P., N. Boudhina, and M. M. Masmoudi. "Technical Note: On the Matt–Shuttleworth approach to estimate crop water requirements." Hydrology and Earth System Sciences 18, no. 11 (November 4, 2014): 4341–48. http://dx.doi.org/10.5194/hess-18-4341-2014.

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Abstract. The Matt–Shuttleworth method provides a way to make a one-step estimate of crop water requirements with the Penman–Monteith equation by translating the crop coefficients, commonly available in United Nations Food and Agriculture Organization (FAO) publications, into equivalent surface resistances. The methodology is based upon the theoretical relationship linking crop surface resistance to a crop coefficient and involves the simplifying assumption that the reference crop evapotranspiration (ET0) is equal to the Priestley–Taylor estimate with a fixed coefficient of 1.26. This assumption, used to eliminate the dependence of surface resistance on certain weather variables, is questionable; numerical simulations show that it can lead to substantial differences between the true value of surface resistance and its estimate. Consequently, the basic relationship between surface resistance and crop coefficient, without any assumption, appears to be more appropriate for inferring crop surface resistance, despite the interference of weather variables.

Wang, Xinran, Lizhen Ge, Dong Liu, Qin Zhu, and Bin Zheng. "Experimental Study on Influencing Factors of Resistance Coefficient and Residual Resistance Coefficient in Oilfield Z." World Journal of Engineering and Technology 07, no. 02 (2019): 270–81. http://dx.doi.org/10.4236/wjet.2019.72018.

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Aida-Zade, K. R., and S. Z. Kuliev. "Hydraulic resistance coefficient identification in pipelines." Automation and Remote Control 77, no. 7 (July 2016): 1225–39. http://dx.doi.org/10.1134/s0005117916070092.

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Bekibayev, Timur, Uzak Zhapbasbayev, Gaukhar Ramazanova, and Daniyar Bossinov. "Oil pipeline hydraulic resistance coefficient identification." Cogent Engineering 8, no. 1 (January 1, 2021): 1950303. http://dx.doi.org/10.1080/23311916.2021.1950303.

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Wrzecioniarz, Piotr, Wojciech Ambroszko, and Aleksandra Pindel. "Limitations of vehicle movement resistances: rolling resistance." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 12 (December 31, 2018): 256–59. http://dx.doi.org/10.24136/atest.2018.394.

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In the paper limitations and exemplary methods of rolling resistance minimization are described. Changes of value of rolling resistance coefficient during years and values for exemplary rolling pairs are presented. Conclusions about future progress are formulated.

Schindelwig, Kurt, Martin Mössner, Michael Hasler, and Werner Nachbauer. "Determination of the rolling resistance of roller skis." Proceedings of the Institution of Mechanical Engineers, Part P: Journal of Sports Engineering and Technology 231, no. 1 (August 1, 2016): 50–56. http://dx.doi.org/10.1177/1754337116628719.

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The rolling resistance of skis used in roller skiing competitions should resemble the gliding resistance of cross-country skis to allow specific training and moving patterns for cross-country skiing and to guarantee equal opportunities for athletes in roller ski races. Therefore, the purpose of this work was to develop a portable rolling resistance meter to precisely measure the rolling resistance of roller skis. Measurements were based on recordings of the angular deceleration of a flywheel due to the rolling resistance between a roller ski’s wheel and the flywheel’s steel surface. Rolling resistance coefficients of four roller ski types ranged between 0.019 and 0.025. Measurements of the rolling resistance coefficient showed a precision of 1.26%. Substantial rolling resistance coefficient variations (10%) were observed for wheels of the same type. Furthermore, the rolling resistance coefficient was found to be negatively correlated with normal load or ambient temperature. The proposed rolling resistance meter is appropriate to determine the rolling resistance coefficient of roller skis’ wheels precisely.

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Дисертації з теми "Coefficient of resistance":

Seo, Scott Y. "Development of techniques to determine temperature coefficient of resistance." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/123270.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2019
Cataloged from PDF version of thesis.
Includes bibliographical references (page 27).
The focus of this thesis was to develop a simple, repeatable method for characterizing the relationship of different materials' electrical resistance with respect to temperature. A measurement of this relationship is the temperature coefficient of resistance (TCR). Determining the TCR allows a material to be used as a temperature probe and can be utilized in thermal conductivity measurements. The test apparatus and measurement setup proved capable of determining the temperature coefficients of resistance of a copper-alloy wire and a carbon film resistor, giving TCR values of 0.0036 1/K and -0.00014 1/K, which was consistent with their published values. The work of this project aims to aid in the development of a micro-cooling system, which uses polycarbonate for its heat exchanger at cryogenic temperatures. A potential carbon film temperature probe was tested, but was found to be unfit for the intended use as a temperature probe on a polycarbonate surface due to catastrophic failures in the film, most likely caused by the different thermal expansion rates of the carbon and polycarbonate. Further research should be conducted to first find a more suitable temperature probe for polycarbonate and then conduct tests at cryogenic temperatures.
by Scott Y. Seo.
S.B.
S.B. Massachusetts Institute of Technology, Department of Mechanical Engineering

Liu, Gengshen. "Measurement of ship resistance coefficient from simple trials during a regular voyage." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/14391.

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Griškevičius, Mečislavas. "High Temperature Effect On Resistance Of Timber Structures." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2010. http://vddb.laba.lt/obj/LT-eLABa-0001:E.02~2010~D_20101119_134602-29128.

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The present dissertation and its main subjects inquires into the pine and oak timber strength property changes-temperature relations. It also explores the behaviour of slender timber elements in axial compression at higher temperatures; and the comparative analysis of obtained results. The work seeks to accomplish the following major tasks: to obtain test data about the influence of high temperature on the properties of different natural – pine and oak – timber; to investigate the behaviour of slender timber elements under axial compression exposed to fire. Taking into account the investigated real fire effect to correct accordingly the existing in LST EN 1995-1-2 procedure for the fire resistance calculation of timber slender elements in compression. The dissertation consists of an introduction, five chapters, general conclusions, a list of references, a list of author’s publications on the dissertation subject, and 2 Annexes. Chapter 1 provides a literature review. It focuses on the publications inquiring into the loss of strength properties by timber at higher temperatures, the fire resistance of timber structures in compression. The chapter ends with the formulation of conclusions and the adjustment of research tasks. Chapter 2 offers the methodology of the research on strength properties of timber at higher temperatures, and the schemes of the developed testing equipment. Chapter 3 presents the procedure of the research on the behaviour of slender timber elements... [to full text]
Disertacijoje nagrinėjami pušinės ir ąžuolinės medienos stipruminių savybių pokyčių temperatūriniai sąryšiai bei medinių centriškai gniuždomų liaunų elementų elgsena veikiant aukštesnėms temperatūroms. Pagrindiniai tyrimo objektai yra Lietuvos spygliuočių ir lapuočių medienos savybių pokyčiai didėjant temperatūrai ir centriškai gniuždomų liaunų medinių elementų elgsenos veikiant kaitrai eksperimentiniai tyrimai bei rezultatų lyginamoji analizė. Darbe spręsti tokie pagrindiniai uždaviniai: gauti eksperimentinius duomenis apie aukštos temperatūros poveikį skirtingos natūralios – pušinės ir ąžuolinės – medienos savybėms, atlikti centriškai gniuždomų liaunų medinių elementų elgsenos ugnyje tyrimus. Atsižvelgiant į tyrinėtą tikrovišką gaisro poveikį patikslinti esamą EN 1995-1-2 medinių liaunų gniuždomų elementų atsparumo ugniai skaičiavimo metodiką. Disertaciją sudaro įvadas, penki skyriai, bendrosios išvados, naudotos literatūros ir autoriaus publikacijų disertacijos tema sąrašai ir du priedai. Pirmasis skyrius skirtas literatūros apžvalgai. Jame pateikta darbų, kuriuose nagrinėjamas aukštesnės temperatūros veikiamos medienos, stipruminių savybių mažėjimas ir kuriuose pateikiami gaisro sąlygomis gniuždomų medinių elementų laikomosios galios tyrimų rezultatai. Pabaigoje formuluotos išvados ir disertacijos tikslai ir uždaviniai. Antrajame skyriuje pateikta medienos stipruminių savybių aukštesnėse temperatūrose tyrimo metodika ir sukurtų nestandartinių bandymo įrenginių schemos... [toliau žr. visą tekstą]

LaBranche, Adrienne Janel. "Creeping Bentgrass, Kentucky Bluegrass and Tall Fescue Responses to Plant Growth Stimulants Under Deficit Irrigation." Thesis, Virginia Tech, 2005. http://hdl.handle.net/10919/32000.

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A four-year drought, increasing population and shifting climate has spurred water conservation practices within Virginia. Creeping bentgrass (Agrostis palustris â L93â ), Kentucky bluegrass (Poa pratensis â Midnightâ ), and tall fescue (Festuca arundinacea) Dominion blend were evaluated under deficit irrigation and upon exogenous application of plant growth stimulants (PGS), seaweed extract (SWE) + humic acid (HA), glycinebetaine (GB) and a commercial SWE product (PP). The objectives were to determine crop coefficients (K_c) for creeping bentgrass fairways and tall fescue home lawns, to determine if PGS application allowed for more water conservation, and to determine if they impacted physiological function and/or root morphology. A preliminary greenhouse experiment was conducted with creeping bentgrass and Kentucky bluegrass irrigated with 100%, 85% and 70% of evapotranspiration (ET). The study determined that an additional deficit irrigation level should be included for the field study and that GB application and 100% and 85% ET irrigation level produced the greatest creeping bentgrass root mass. The two â year field study evaluated creeping bentgrass and tall fescue. Tall fescue home lawns could be irrigated every five days with a K_c of 0.55 or once a week with a K_c of 0.70. Creeping bentgrass fairways could be irrigated every four days with a K_c of 0.85. Glycinebetaine application increased bentgrass rooting after planting and showed osmoprotectant properties. Another greenhouse study evaluated five GB rates on bentgrass and tall fescue. No differences were found between the five rates and concluded that the rate utilized in the field study may be appropriate for turfgrass application.
Master of Science

Iyalla, Ibiyekariwaripiribo. "Computational fluid dynamics modelling of pipeline on-bottom stability." Thesis, Robert Gordon University, 2017. http://hdl.handle.net/10059/2721.

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Subsea pipelines are subjected to wave and steady current loads which cause pipeline stability problems. Current knowledge and understanding on the pipeline on-bottom stability is based on the research programmes from the 1980’s such as the Pipeline Stability Design Project (PIPESTAB) and American Gas Association (AGA) in Joint Industry Project. These projects have mainly provided information regarding hydrodynamic loads on pipeline and soil resistance in isolation. In reality, the pipeline stability problem is much more complex involving hydrodynamic loadings, pipeline response, soil resistance, embedment and pipe-soil-fluid interaction. In this thesis Computational Fluid Dynamics (CFD) modelling is used to investigate and establish the interrelationship between fluid (hydrodynamics), pipe (subsea pipeline), and soil (seabed). The effect of soil types, soil resistance, soil porosity and soil unit weight on embedment was examined. The overall pipeline stability alongside pipeline diameter and weight and hydrodynamic effect on both soil (resulting in scouring) and pipeline was also investigated. The use of CFD provided a better understanding of the complex physical processes of fluid-pipe-soil interaction. The results show that the magnitude of passive resistance is on the average eight times that of lateral resistance. Thus passive resistance is of greater significance for subsea pipeline stability design hence the reason why Coulomb’s friction theory is considered as conservative for stability design analysis, as it ignores passive resistance and underestimates lateral resistance. Previous works (such as that carried out by Lyons and DNV) concluded that soil resistance should be determined by considering Coulomb’s friction based on lateral resistance and passive resistance due to pipeline embedment, but the significance of passive resistance in pipeline stability and its variation in sand and clay soils have not be established as shown in this thesis. The results for soil porosity show that increase in pipeline stability with increasing porosity is due to increased soil liquefaction which increases soil resistance. The pipe-soil interaction model by Wagner et al. established the effect of soil porosity on lateral soil resistance but did not attribute it to soil liquefaction. Results showed that the effect of pipeline diameter and weight vary with soil type; for sand, pipeline diameter showed a greater influence on embedment with a 110% increase in embedment (considering combined effect of diameter and weight) and a 65% decrease in embedment when normalised with diameter. While pipeline weight showed a greater influence on embedment in clay with a 410% increase. The work of Gao et al. did not completely establish the combined effect of pipeline diameter and weight and soil type on stability. Results also show that pipeline instability is due to a combination of pipeline displacement due to vortex shedding and scouring effect with increasing velocity. As scoring progresses, maximum embedment is reached at the point of highest velocity. The conclusion of this thesis is that designing for optimum subsea pipeline stability without adopting an overly conservative approach requires taking into consideration the following; combined effect of hydrodynamics of fluid flow on soil type and properties, and the pipeline, and the resultant scour effect leading to pipeline embedment. These results were validated against previous experimental and analytical work of Gao et al, Brennodden et al and Griffiths.

Milesi, Paul. "Interactions between waves and new generations of brakewaters with small footprint." Thesis, Ecole centrale de Marseille, 2019. http://www.theses.fr/2019ECDM0003/document.

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De nos jours, le respect de l'environnement est une obligation dans le cadre de travaux maritimes. Les caissons en béton verticaux à plaques poreuses sont souvent la solution technique privilégiée pour agrandir les ports existants et / ou améliorer l'agitation des bassins. L'empreinte au sol est réduite et la demande en matériaux de carrière est moins importante par rapport aux digues en enrochement classiques. Récemment, des systèmes alternatifs aux caissons en béton verticaux ont été conçus. Les structures amortisseuses de la houle à enrochements verticalisés sont constituées d'une structure métallique entourant des blocs. Ce type de structure offre des avantages environnementaux, une perméabilité aux courants et une bonne performance hydrodynamique. Ce travail de thèse visait à développer un nouveau code 3D-BEM facile à utiliser et intégrant les écoulements en milieux poreux. Des géométries innovantes sont testées comme des gabions espacés avec une chambre d’expansion ou un mélange de plaques poreuses et de milieux poreux.La description des écoulements dans un milieu poreux est une question complexe. Navier-Stokes moyenné au sens de Reynolds (RANS) est le processus mathématique communément utilisé pour modéliser les écoulements en milieux poreux. Ce dernier est considéré comme un milieu continu homogène. L'équation bien connue de Forchheimer étendue décrit les forces volumiques appliquées à l'écoulement par un milieu poreux à travers des coefficients de résistance et d'inertie. Ces recherches ont été l’occasion d’examiner ces coefficients, notamment celui d'inertie mal connu dans le cas d’un milieu poreux. Il joue un rôle majeur pour les écoulements à très faible KC se produisant dans les couches internes des digues poreuses. Une analyse de la littérature sur les écoulements de milieux poreux a été entreprise. Le code numérique appelé Diffra3D a été développé. Il a ensuite été utilisé pour rechercher des coefficients de résistance de milieux poreux à l'aide de données provenant de trois campagnes expérimentales : un test de sloshing sur hexapode et deux études classiques de transmission/réflexion en canal à houle. Celles-ci ont également été l'occasion de tester et de calibrer le code. De nouvelles géométries de structures poreuses ont ensuite été testées expérimentalement et numériquement.Deux nouvelles valeurs de coefficients de résistance d'un milieu poreux sont proposées pour les écoulements à très faibles KC. Certaines caractéristiques intéressantes concernant le coefficient d'inertie CM d'un milieu poreux sont également développées. Ce sujet de recherche mériterait encore d’être approfondi pour tenter de trouver une ou plusieurs loi(s) empirique(s) décrivant l’évolution du coefficient d'inertie dans ce régime spécifique d’écoulement. Le code Diffra3D fonctionne de façon satisfaisante pour modéliser les écoulements en milieu poreux. Il est cependant limité aux vagues à faibles cambrures. Tout l'enjeu est de bien caractériser le milieu poreux étudié. L'utilisation de Diffra3D a permis de montrer que les structures poreuses verticales innovantes, telles que les gabions espacés, ont entièrement leur place en tant que digues amortisseuses de la houle respectueuses de l'environnement. Elles pourraient être couramment utilisées dans le futur
Nowadays the respect of the environment is an obligation in maritime works. Vertical concrete caissons with porous plates are often the number one technical solution to enlarge existing ports and/or to improve the agitation of the basins. The footprint is reduced and the demand in quarry materials is less important compared to classical riprap breakwaters. Recently, alternative systems to vertical concrete caissons have been designed. Vertical riprap breakwaters are made of a metal framework enclosing blocks. This kind of structure offers environmental benefits, permeability for currents and a good hydrodynamic performance. This thesis work looks at developing a new 3D-BEM code that is easy to use and integrates porous media. Innovative geometries are tested like spaced gabions with damping chamber or a mix of porous plates and porous media.Describing flows in porous media is an complex issue. Volume averaging method is the common mathematical process used to model porous media flows without drawing every grain of a porous medium. The well-known extended Forchheimer equation describes the volumetric forces applied to the flow by a porous medium through resistance and inertial coefficients. These researches were the occasion to look into this coefficients, especially the one of poorly understood inertia in the case of a porous medium. It plays a major role in very low-KC flows currently occurring in porous breakwaters apart from armour layer.First, a literature review on porous media flows was undertaken. In parallel, the numerical code called Diffra3D was produced. It was then used to look for resistance coefficients of porous media through data coming from three experimental campaigns : one sloshing test on hexapode and two classical reflection-transmission studies in a wave tank. These campaigns were also the occasion to test and calibrate the code. New geometries of porous structures were then tested experimentally and numerically. Two new values of resistance coefficients of a porous medium are proposed. Some interesting features concerning the inertia coefficient CM of a porous medium are also developed. In simulations, we observe that the hydrodynamic behaviour of porous structures in low-KC flows is very sensitive to the coefficient of inertia. This research topic would still deserve further studies in order to find empirical law(s) for the inertia coefficient of a porous medium. The code Diffra3D performs well to model porous media flows. However, it is limited to waves with low steepness. The challenge is to properly characterise the porous medium. This research has shown that innovative porous structures like spaced gabions have proven their place as environmentally-friendly damping breakwaters. They may be commonly used in the future

Hutama, Chapin. "Effect of Inclusion of Nanofibers on Rolling Resistance and Friction of Silicone Rubber." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron1556118372072796.

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Piskoř, Martin. "Konstrukce zařízení pro měření valivého odporu pneumatiky." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254428.

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The aim of this thesis is a construction concept of tyre rolling resistance measuring device. The first part deals with the rolling resistance. It describes its causes, its influential factors and it also includes rolling resistance identification methods. The second part deals with construction design of the rolling resistance measuring device itself. It contains stress analysis, and fatigue analyses as well. It includes selection of transducers used for tyre rolling resistance measuring and also measurement error analyses. The last part focuses on estimated financial requirements connected with producing and assembling the designed measuring device.

Pinheiro, Francisco NascÃlio. "Development of a New Prototype Thermal Desalination with Heat Recovery Triggered by Source Controlled of Electric Energy." Universidade Federal do CearÃ, 2013. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=11517.

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CoordenaÃÃo de AperfeiÃoamento de NÃvel Superior
Solar thermal desalination plants operate with variable heat source, solar radiation, which complicates the identification of the influence of process variables and of the constructive geometric parameters. In operation, brackish or salt water is heated in a storage tank, where it evaporates and condenses on the walls of a lower metal tray (first stage) installed above the tank. By condensing, the steam transfers heat to the salt water of this first stage and the condensate is collected on the outside of the tank. This work aims to develop a new prototype desalination unit with thermal controllable operating parameters for operation in transient and steady states. In the prototype, the heating of the water to be desalinated is done by electrical resistance with controllable source, allowing the variation of the desired heating power. Sensors of the type PT-100 were installed, especially specified for the dimensions of the storage tank for measuring water temperature at different positions in the tank. The mass of water in the tank is measured by a precision balance. With the measurements, graphics of water temperature of the tank during the heating, the cooling and the steady state were constructed. Also, the Global Coefficient of Heat Transfer was measured for phases of heating, cooling and steady state. Finally, desalination was found by the electrical conductivity of the used water.
Dessalinizadores solares tÃrmicos operam com fonte variÃvel de calor, a radiaÃÃo solar, o que dificulta a identificaÃÃo da influÃncia das variÃveis de processo e dos parÃmetros geomÃtricos construtivos. Em seu funcionamento, Ãgua salobra ou salgada Ã aquecida em um tanque de armazenamento, onde evapora e condensa nas paredes inferiores de uma bandeja metÃlica (primeiro estÃgio) instalada acima do tanque. Ao condensar, o vapor transfere calor para a Ãgua salgada desse primeiro estÃgio e o condensado Ã coletado no exterior do tanque. O presente trabalho tem como objetivo o desenvolvimento de um novo protÃtipo de dessalinizador tÃrmico com parÃmetros operacionais controlÃveis para funcionamento em regimes transiente e permanente. No protÃtipo, o aquecimento da Ãgua a ser dessalinizada Ã feito por resistÃncia elÃtrica com fonte de tensÃo controlÃvel, permitindo a variaÃÃo desejÃvel da potÃncia de aquecimento. Foram instalados sensores do tipo PT-100, especialmente especificados para as dimensÃes do tanque de armazenamento, para mediÃÃes de temperaturas da Ãgua em diferentes posiÃÃes no tanque. A massa de Ãgua no tanque Ã medida por balanÃa de precisÃo. Com as mediÃÃes realizadas, foram construÃdos grÃficos de temperatura da Ãgua do tanque durante os regimes constante de aquecimento e resfriamento. Foi tambÃm medido o Coeficiente Global de TransferÃncia de Calor para as fases de aquecimento, regime permanente e resfriamento. Por fim, foi constatada a dessalinizaÃÃo por medidas de condutividade elÃtrica da Ãgua utilizada.

Nekulová, Pavla. "Součinitel tření povrchu vozovky a Skid Resistance Index." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-226945.

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This diploma thesis deals with the relation between the longitudinal friction coefficient dependence on measuring speed and the value of road surface macrotexture MPD. Results of longitudinal friction coefficient and value of MPD measurement on 73 sections are included in this thesis. The results were compared by regression analysis and its outcome was used for determination of formula that enable calculation of longitudinal friction coefficient for any operating speed when longitudinal friction coefficient for 60 km/h and value of macrotexture are known. The evaluation scale for skid resistance index (SRI) was also determined in this thesis. It could be used for evaluation of skid resistance independently of the type of device used for friction coefficient measurement.

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Книги з теми "Coefficient of resistance":

Zaharioudakis, Nikolaos I. An investigation of performance of aggregate mixtures by measuring their skid-resistance and coefficient of friction. [London]: Queen Mary and Westfield College, 1998.

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Miyoshi, Kazuhisa. Wear-resistant, self-lubricating surfaces of diamond coatings. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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Miyoshi, Kazuhisa. Wear-resistant, self-lubricating surfaces of diamond coatings. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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Miyoshi, Kazuhisa. Wear-resistant, self-lubricating surfaces of diamond coatings. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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Miyoshi, Kazuhisa. Wear-resistant, self-lubricating surfaces of diamond coatings. [Washington, DC]: National Aeronautics and Space Administration, 1995.

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Miyoshi, Kazuhisa. Surface design and engineering toward wear-resistant, self-lubricant diamond films and coatings. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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Miyoshi, Kazuhisa. Surface design and engineering toward wear-resistant, self-lubricating diamond films and coatings. [Cleveland, Ohio]: National Aeronautics and Space Administration, Lewis Research Center, 1999.

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Miyoshi, Kazuhisa. Friction and wear of ion-beam-deposited diamondlike carbon on chemical-vapor-deposited, fine-grain diamond. [Washington, D.C: National Aeronautics and Space Administration, 1996.

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Частини книг з теми "Coefficient of resistance":

Gooch, Jan W. "Temperature Resistance Coefficient." In Encyclopedic Dictionary of Polymers, 732. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_11613.

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Sun, Tao. "Resistance Coefficient and Diversion Rate of Heterogeneous Reservoir in Polymer Flooding." In Springer Series in Geomechanics and Geoengineering, 3090–97. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2485-1_285.

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Xu, Bin, Zhibiao Li, Gang Tang, Yulong Bao, and Huang Wang. "Micro Heater with Low Temperature Coefficient of Resistance for ICF Target." In Human Centered Computing, 493–503. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-37429-7_49.

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Snarskii, Andrei A., Igor V. Bezsudnov, Vladimir A. Sevryukov, Alexander Morozovskiy, and Joseph Malinsky. "Temperature Coefficient of Resistance and Third Harmonic Generation Close to Percolation Threshold." In Transport Processes in Macroscopically Disordered Media, 247–51. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4419-8291-9_19.

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Jiang, Ming, Yuwen Liu, Lijing Cao, and Zhiyuan Zhang. "Identification of Certain Shrapnel’s Air Resistance Coefficient in Plateau Environment Based on CK Method." In Communications in Computer and Information Science, 238–44. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3966-9_26.

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Maillet, D., A. Degiovanni, and S. André. "Estimation of a Space-Varying Heat Transfer Coefficient or Interface Resistance by Inverse Conduction." In Thermal Conductivity 23, 72–84. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003210719-10.

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Liarokapis, D. E., G. P. Trachanas, and G. D. Tzabiras. "An experimental investigation on the resistance and added resistance of two series 60 models with block coefficient 0.6 and 0.7 respectively." In Developments in Maritime Technology and Engineering, 415–20. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003216599-43.

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Bulgakov, Volodymyr, Oleksandr Parakhin, Vasil Mitkov, and Tetiana Chorna. "The Coefficient Determination of a Damper Washer Hydraulic Resistance for Reducing a Technical Module Oscillation Amplitude." In Modern Development Paths of Agricultural Production, 183–90. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-14918-5_20.

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Kim, Tae Soo, Han Seung Lee, Sung Ho Tae, and Sung Ok Oh. "Friction Coefficient in High Tension Bolt Joints Using a Zn/Al Metal Spray Corrosion Resistance Method." In Advances in Fracture and Damage Mechanics VI, 465–68. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-448-0.465.

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Chernets, Myron V., Serge V. Shil’ko, and Victor E. Starzhinsky. "Estimation of Bearing Capacity and Wear Resistance of Spur Gear Meshing Taking into Account Tooth Profile Correction and Sliding Friction Coefficient." In New Approaches to Gear Design and Production, 261–72. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-34945-5_10.

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Тези доповідей конференцій з теми "Coefficient of resistance":

Wang, Xin, Yuxin Wang, and Jun Yao. "Resistance coefficient identification of ballistic with random wind." In 2011 6th IEEE Conference on Industrial Electronics and Applications (ICIEA). IEEE, 2011. http://dx.doi.org/10.1109/iciea.2011.5975685.

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Wei, Jianwei, and Minxiang Wei. "Study on Assist Coefficient and Disturbance Resistance for EPS." In 2009 International Conference on Measuring Technology and Mechatronics Automation. IEEE, 2009. http://dx.doi.org/10.1109/icmtma.2009.396.

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Bereznyak, Yu S., L. V. Odnodvorets, N. I. Shumakova, I. Yu Protsenko, C. J. Panchal, Priya S. Suryavanshi, Z. M. Protsenko, and P. K. Mehta. "Thermal Coefficient of Resistance of High-entropy Film Alloys." In 2018 IEEE 8th International Conference Nanomaterials: Application & Properties (NAP). IEEE, 2018. http://dx.doi.org/10.1109/nap.2018.8915319.

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Koo, Bonmin, and Kihoon Han. "Estimate the Road Resistance Coefficient of Light Weight Vehicle." In Asia Pacific Automotive Engineering Conference. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2013. http://dx.doi.org/10.4271/2013-01-0077.

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Jayasinghe, Lalith, Yimin Gu, and Nadarajah Narendran. "Characterization of thermal resistance coefficient of high-power LEDs." In SPIE Optics + Photonics, edited by Ian T. Ferguson, Nadarajah Narendran, Tsunemasa Taguchi, and Ian E. Ashdown. SPIE, 2006. http://dx.doi.org/10.1117/12.682585.

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Quinn, C., J. Steciak, R. Budwig, D. McIlroy, and S. Beyerlein. "Measuring the Temperature Coefficient of Resistance for Nanospring Combustion Catalysts." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-64912.

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Platinum has been recognized as a viable combustion catalyst. Its change in electrical resistance with temperature has been used to measure light-off temperatures and rates of heat generation for various fuel-oxygen mixtures at the University of Idaho. In an attempt to maximize the surface area for these reactions to occur, platinum-coated nanosprings have been manufactured. A reliable method of determining an effective temperature-dependent temperature coefficient of resistance (α(T)) for the nanosprings assembly has been developed and verified using pure platinum. Measured values of α(T) for platinum were matched against literature data at 373 and 1100 K. A linear fit was assumed for the gap between these temperatures; measurements made with platinum at intermediate temperatures were in good agreement. Using the same methodology, α(T) for the nanosprings assembly will be determined, which will allow for further research of the nanosprings in catalytic combustion.

Khan, Asir Intisar, Kevin Brenner, Kirby K. H. Smithe, Michal J. Mleczko, and Eric Pop. "Large Temperature Coefficient of Resistance in Atomically Thin 2D Devices." In 2019 Device Research Conference (DRC). IEEE, 2019. http://dx.doi.org/10.1109/drc46940.2019.9046401.

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Bejestan, Mahmood Shafai, and Mohammad Bahrami Yarahmadi. "River Bed Resistance Coefficient Variation of Different Sediment Particle Shapes." In World Environmental And Water Resources Congress 2012. Reston, VA: American Society of Civil Engineers, 2012. http://dx.doi.org/10.1061/9780784412312.158.

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CHOI, JUNWOO, KAB KEUN KWON, KWANG OH KO, and SUNG BUM YOON. "HYDRAULIC EXPERIMENT FOR EQUIVALENT RESISTANCE COEFFICIENT FOR INUNDATION SIMULATION MODEL." In Proceedings of the 5th International Conference on APAC 2009. World Scientific Publishing Company, 2009. http://dx.doi.org/10.1142/9789814287951_0094.

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Maffucci, A., G. Miano, F. Micciulla, A. Cataldo, and S. Bellucci. "Carbon nanotube interconnects with negative temperature coefficient of the resistance." In 2017 International Applied Computational Electromagnetics Society Symposium - Italy (ACES). IEEE, 2017. http://dx.doi.org/10.23919/ropaces.2017.7916338.

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Звіти організацій з теми "Coefficient of resistance":

Yochum, Steven E., Francesco Comiti, Ellen Wohl, Gabrielle C. L. David, and Luca Mao. Photographic guidance for selecting flow resistance coefficients in high-gradient channels. Ft. Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, 2014. http://dx.doi.org/10.2737/rmrs-gtr-323.

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Wei, Fulu, Ce Wang, Xiangxi Tian, Shuo Li, and Jie Shan. Investigation of Durability and Performance of High Friction Surface Treatment. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317281.

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The Indiana Department of Transportation (INDOT) completed a total of 25 high friction surface treatment (HFST) projects across the state in 2018. This research study attempted to investigate the durability and performance of HFST in terms of its HFST-pavement system integrity and surface friction performance. Laboratory tests were conducted to determine the physical and mechanical properties of epoxy-bauxite mortar. Field inspections were carried out to identify site conditions and common early HFST distresses. Cyclic loading test and finite element method (FEM) analysis were performed to evaluate the bonding strength between HFST and existing pavement, in particular chip seal with different pretreatments such as vacuum sweeping, shotblasting, and scarification milling. Both surface friction and texture tests were undertaken periodically (generally once every 6 months) to evaluate the surface friction performance of HFST. Crash records over a 5-year period, i.e., 3 years before installation and 2 years after installation, were examined to determine the safety performance of HFST, crash modification factor (CMF) in particular. It was found that HFST epoxy-bauxite mortar has a coefficient of thermal expansion (CTE) significantly higher than those of hot mix asphalt (HMA) mixtures and Portland cement concrete (PCC), and good cracking resistance. The most common early HFST distresses in Indiana are reflective cracking, surface wrinkling, aggregate loss, and delamination. Vacuum sweeping is the optimal method for pretreating existing pavements, chip seal in particular. Chip seal in good condition is structurally capable of providing a sound base for HFST. On two-lane highway curves, HFST is capable of reducing the total vehicle crash by 30%, injury crash by 50%, and wet weather crash by 44%, and providing a CMF of 0.584 in Indiana. Great variability may arise in the results of friction tests on horizontal curves by the use of locked wheel skid tester (LWST) due both to the nature of vehicle dynamics and to the operation of test vehicle. Texture testing, however, is capable of providing continuous texture measurements that can be used to calculate a texture height parameter, i.e., mean profile depth (MPD), not only for evaluating friction performance but also implementing quality control (QC) and quality assurance (QA) plans for HFST.