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Academic literature on the topic 'Transfer Optimisation'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Transfer Optimisation"

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Kerby, J., T. Hillyer, R. McCoy, D. Popova, T. Gaskell, and J. Barry. "Transfer and optimisation of ATMP manufacturing." Cytotherapy 19, no. 5 (May 2017): S115. http://dx.doi.org/10.1016/j.jcyt.2017.02.182.

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Othman, Muhammad Murtadha, and Bibi Norashiqin Sheikh Rahimullah. "Available Transfer Capability Optimisation Using Evolutionary Programming." Scientific Research Journal 4, no. 2 (December 31, 2007): 13. http://dx.doi.org/10.24191/srj.v4i2.5656.

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In a deregulated electric power industry, transmission providers are required to rapidly produce commercially viable information of available transfer capability (ATC) so that such information can help power marketers, sellers and buyers in planning, operation and reserving transmission services. ATC is a measure of the additional amount of power transfer that may flow across the interface, over and above the base case flows without jeopardizing power system security. This paper presents the ATC determination using the evolutionary programming (EP) technique using modified Gaussian formulation. The proposed EP technique has the ability in providing accurate ATC results and the computation burden caused by the AC power flow solutions are significantly reduced. The outages of critical line that adversely affect the amount of ATC are determined by performing the line contingency ranking and selection. ATC determinations have been made on the case study of Malaysian system. Comparison in terms of accuracy and computation time in estimating the ATC are made by considering the three methods which are the EP using modified Gaussian formulation (EPMG), EP using standard Gaussian formulation (EPSG) and the recursive AC power flow solution (RACPF).
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Othman, Muhammad Murtadha, and Bibi Norashiqin Sheikh Rahimullah. "Available Transfer Capability Optimisation Using Evolutionary Programming." Scientific Research Journal 4, no. 2 (December 31, 2007): 13. http://dx.doi.org/10.24191/srj.v4i2.9341.

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In a deregulated electric power industry, transmission providers are required to rapidly produce commercially viable information of available transfer capability (ATC) so that such information can help power marketers, sellers and buyers in planning, operation and reserving transmission services. ATC is a measure of the additional amount of power transfer that may flow across the interface, over and above the base case flows without jeopardizing power system security. This paper presents the ATC determination using the evolutionary programming (EP) technique using modified Gaussian formulation. The proposed EP technique has the ability in providing accurate ATC results and the computation burden caused by the AC power flow solutions are significantly reduced. The outages of critical line that adversely affect the amount of ATC are determined by performing the line contingency ranking and selection. ATC determinations have been made on the case study of Malaysian system. Comparison in terms of accuracy and computation time in estimating the ATC are made by considering the three methods which are the EP using modified Gaussian formulation (EPMG), EP using standard Gaussian formulation (EPSG) and the recursive AC power flow solution (RACPF).
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Block, Christophe, Amit Kumar Ghosh, Bruno Van Mele, and Guy Van Assche. "RheoDSC: Design optimisation by heat transfer modelling." Thermochimica Acta 547 (November 2012): 130–40. http://dx.doi.org/10.1016/j.tca.2012.08.019.

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Besuchet, Romain, Christophe Auvigne, Dan Shi, Christophe Winter, Yoan Civet, and Yves Perriard. "Optimisation of an inductive power transfer structure." Journal of international Conference on Electrical Machines and Systems 2, no. 3 (September 1, 2013): 349–55. http://dx.doi.org/10.11142/jicems.2013.2.3.349.

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Kenwright, Alan M., Juan A. Aguilar, Banabithi Koley Seth, and Ilya Kuprov. "Coherence transfer delay optimisation in PSYCOSY experiments." Magnetic Resonance in Chemistry 58, no. 1 (July 22, 2019): 51–55. http://dx.doi.org/10.1002/mrc.4920.

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Manzari, M. T., D. T. Gethin, and R. W. Lewis. "Optimisation of heat transfer between casting and mould." International Journal of Cast Metals Research 13, no. 4 (December 2000): 199–206. http://dx.doi.org/10.1080/13640461.2000.11819402.

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Zou, Xiao Kang, Hoi Yuen Lee, Edward Sai Cheong Chan, and Ping Xiang. "Cost design optimisation of concrete transfer beam structures." HKIE Transactions 21, no. 3 (July 3, 2014): 178–91. http://dx.doi.org/10.1080/1023697x.2014.948532.

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Tao, Tao, Zoltán Macháty, Lalantha R. Abeydeera, Billy N. Day, and Randall S. Prather. "Optimisation of porcine oocyte activation following nuclear transfer." Zygote 8, no. 1 (February 2000): 69–77. http://dx.doi.org/10.1017/s0967199400000848.

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Experiments were conducted to examine the effects of (a) different activation methods, (b) incubation time in calcium-free medium and (c) bisbenzimide staining on the activation and subsequent development of pig oocytes. Oocytes were matured in vitro and activated by one of the following methods: combined thimerosal/dithiothreitol (DTT) treatment, calcium ionophore A23187 treatment followed by incubation in the presence of 6-dimethylaminopurine (6-DMAP), electroporation, and electroporation followed by incubation with cytochalasin B. There were no significant differences in the activation rate (ranging from 70.0% to 88.3%) and the percentage of cleaved embryos after activation (ranging between 48.8% and 58.8%) among the four treatment groups (p < 0.05). The rate of development to the blastocyst stage in oocytes activated by thimerosal/DTT (10.0%) or electroporation followed by cytochalasin B treatment (12.3%) was significantly higher (p < 0.05) than in the group activated with A23187/6-DMAP (2.5%). Both the activation rate and the rate of blastocyst formation in oocytes that were incubated in Ca2+-free medium for 8 h before thimerosal/DTT activation were significantly lower (p < 0.05) than in those incubated for 0, 1 or 4 h. Intracellular Ca2+ measurements revealed that the Ca2+ homeostasis in these oocytes were severely altered. Staining of oocytes with 5 μg/ml bisbenzimide for 2 h decreased the quality of blastocysts and increased the rate of degenerated embryos at day 6. Two activation protocols (thimerosal/DTT and electroproation) were used for activation after nuclear transfer; the rate of nuclear formation did not differ in the oocytes activated by the two different methods.
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Dolgui, A., N. Guschinsky, G. Levin, and J. M. Proth. "Optimisation of multi-position machines and transfer lines." European Journal of Operational Research 185, no. 3 (March 2008): 1375–89. http://dx.doi.org/10.1016/j.ejor.2006.03.069.

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Dissertations / Theses on the topic "Transfer Optimisation"

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Sobotka, Vincent. "Optimisation thermique du procédé Resin Transfer Molding." Nantes, 2004. http://www.theses.fr/2004NANT2094.

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Les matériaux composites structuraux, à renfort continus (fibres longues ou tissés) sont de plus en plus utilisés, notamment dans les secteurs automobiles, aéronautiques, nautiques et sportifs. Le procédé Resin Transfer Molding est un procédé de fabrication de pièces composites adapté aux séries moyennes correspondant de plus en plus à celles rencontrées dans l'automobile. Ce procédé répond en outre aux exigences environnementales de non émission de solvant, le moulage étant réalisé en moule fermé. Cette étude réalisée dans le cadre des Programmes de Recherche et d'Innovation dans les Transports Terrestres (PREDIT) du Ministère de l'éducation nationale associait plusieurs partenaires académiques et industriels. Elle s'est intéressée à la caractérisation thermique des matériaux composites à base de polyester insaturé et de renforts en verre, ainsi qu'à leur transformation. On a ainsi effectué l'analyse expérimentale par mesure in-situ et la modélisation des transferts thermiques dans le procédé. Des modèles nouveaux ont été développés et validés. Une première illustration d'une méthodologie d'optimisation thermique du procédé a été montrée
Structural composite materials manufactured with continuous reinforcement (either woven or long fibers) are more and more used, notably in the car industries, aeronautical, nautical and sports domains. The Resin Transfer Molding process is a process of composite part manufacture adapted to average production corresponding more and more to those met in car industries. Besides, this process complies with the environmental requirements of solvent release, molding being achieved in closed mold. This work achieved within the framework of the Programs of Research and Innovation in Ground Transport (PREDIT) of the Ministry of National Education associated several academic and industrial partners. It concerned the thermal characterization of composite materials made of unsaturated polyester and glass reinforcements, as well as their transformation. Experimental analyses were carried out by in-situ measures as well as the modelling of the heat transfer in the process. Some new models have been developed and have been validated. A first illustration of a methodology of thermal optimization of the process has been shown
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Thompson, Seth Mkhanyisi. "Optimisation of insertion point during latissimus dorsi tendon transfer." Master's thesis, University of Cape Town, 2018. http://hdl.handle.net/11427/29524.

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Problem and Motivation: Posterior rotator cuff injuries are common (Yamaguchi et al., 2006), (Neri et al., 2009) and often debilitating and irreparable (Sim et al., 2001). Latissimus dorsi (LD) tendon transfers have been shown to be an effective treatment for these massive or irreparable tears (Habermeyer, 2006), (De Casas et al., 2014). This procedure can have unpredictable outcomes (Ling et al., 2009). This is partially caused by discrepancies in the suggested insertion site for the LD tendon during transfers. The current literature is composed of in-silico studies which ignore the practicalities of the human body (Magermans et al., 2004), in-vivo studies which use subjective pain scores, and small scale cadaver trials. For these reasons, a study is needed that uses the power of in-silico modeling in a way that is verified using in-vitro testing on cadavers. Aims and Objectives: The aim of this study is to determine the effects of varying the insertion point of the LD tendon on the humeral head to treat posterior rotator cuff tears in terms of the effects on strength, primarily in rotation and in flexion over a range of motion. The objectives are to use an in-silico model to define the effects of various insertion points and validate this model using a cadaver trial before presenting the final findings. Methods: In-silico Model The Upper Extremity Model (Holzbaur et al., 2005) was used to simulate tendon transfers. The moment arms in flexion and rotation were measured and recorded at angles of 0° and 90° of forward ix elevation. The moment arms at each point were then projected onto humeral maps to display the results. Cadaver Trial Four fresh frozen cadaver torsos (eight shoulders) were mounted into a specifically designed rig. The LD was transferred to 7 points illustrative of the humeral head. The strain generated by the humerus in rotation on the clamps was measured at 0° and 90° of forward flexion for each point. These were then compared. Results In-silico Model The in-silico moment arm maps were generated and analysed. The optimal point for external rotation at 0° of flexion was the lesser tuberosity. Moment arms to produce external rotation were found over the entire greater tuberosity. Flexion was only generated on the posterior edge of the greater tuberosity. At 90° of flexion, little to no rotation generating moment arms were found in the lesser tuberosity and the anterior ridge of the greater tuberosity. Rotation generating moment arms were not significantly different between the posterior edge and the face of the greater tuberosity. No areas generated flexion moment arms. Cadaver Trial At 0° of flexion, the lesser tuberosity (point 1) generated the most flexion, with the greater tuberosity (points 2-7) also generating external rotation, but at reduced levels. At 90° of flexion, the lesser tuberosity and the anterior ridges of the greater tuberosty (points 1-3) generated no significant rotation. The posterior ridge and face of the greater tuberosity generated similar amounts of flexion, greater than points 1-3 Conclusions: The in-silico model was validated in rotation by the cadaver trials and this validation was extended to flexion. For maximum rotation strength at 0° of flexion and no flexion strength, the x lesser tuberosity is the optimal point. For maximum rotation strength and no flexion throughout the motion of flexion, the middle of the face of the greater tuberosity is the optimal area. For maximum rotation throughout the motion of flexion, points 4 and 5 (the posterior edge of the greater tuberosity) represent the optimal area for insertion. This area represents the optimal compromise in terms of range of motion and strength.
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McNab, Christopher. "Design optimisation of internally finned tube charge-air coolers." Thesis, University of Brighton, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246001.

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Obame, Mve Herbert. "Compréhension des écoulements et optimisation des transferts de chaleur et de masse au sein d’une structure capillaire." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0052/document.

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La climatisation automobile est un enjeu majeur pour les constructeurs automobiles dans la mesure où elle occasionne un rejet de 10 g de CO2 par km, une surconsommation énergétique de près de 5 % et sera pris en compte dans le bilan MEVG à l'horizon 2020. Dans cette perspective, le constructeur automobile PSA Peugeot Citroën a développé un nouveau procédé : la climatisation par absorption de vapeur d'eau par une solution saline de bromure de lithium, qui marque la rupture avec le système classique à compression de vapeur. Le travail mené dans ce manuscrit s'est focalisé au niveau de l'organe principal du système, l'évaporateur/absorbeur où les deux fluides s'écoulent et sont confinés chacun entre deux grilles tissées par des effets capillaires. Les transferts de masse et de chaleur qui s'y produisent, ont lieu à l'interface liquide/vapeur formée par des ménisques de forme complexe qui constituent la surface de d'échange. L'objectif est d'intensifier les transferts de masse et de chaleur qui diffuse à travers l'interface. Un banc expérimental permettant la description tridimensionnelle de la forme des ménisques au moyen de la microscopie confocale a été développé. Le modèle « volume of fluid » a été utilisé pour la reconstruction numérique de l'interface liquide/ vapeur. La comparaison entre les données expérimentales et les simulations numériques a montré un bon accord. Ces simulations montrent que l'écoulement est influencé par la grille avec la création de zones mortes et des mouvements de vorticité. Une optimisation numérique a été menée avec comme fonction objectif le flux qui diffuse à travers l'interface. Celle-ci a permis de définir des paramètres optimales de la grille permettant d’atteindre un flux de chaleur de près de 2,5 fois supérieur à celui du cas de référence. Cette optimisation a permis l'identification d'une zone préférentielle dans laquelle les transferts de chaleur sont maxima. Le travail a aussi abordé l'influence de la forme des fils et de la forme des ménisques, montrant qu'il est préférable d’adopter des matériaux à caractère hydrophobe avec des fils à section circulaire
Abstract The automotive air conditioning is a major challenge for the automotive manufacturers insofar it causes a release of 10 g/CO2/km, engenders an extrafuel consumption of 5 % and will be taken into account in the balance sheet in 2020 MEVG. In this perspective, the automotives constructor PSA Peugeot Citroën has developed a new process, absorption air conditioning of water vapor by lithium bromide solution, which marks a break with the classic vapor-compression system. This manuscript is focused at the main body of the system, an innovative evaporator/absorber where both fluids are flowing down and confined between two finely meshed plastic wire screens and maintained between them by capillary effects. The heat and mass transfers in this system occur at the liquid/vapour interface formed by complex menisci that represent the surface of transfer. An experimental test bench allowing the description of three-dimensional shape of menisci using confocal microscopy has been carried. The volume of fluid model has been used for the numerical reconstruction of the liquid/vapour interface. The comparison between numerical and experimental data has shown a good agreement. Numerical simulations have shown that the flow is influenced by the geometry that promotes the creation of stagnant layer solution and vorticity zones. A numerical optimization has been carried with as objective function the heat rate that di uses through the interface. This one has allowed to get out the optimal parameters allowing to have an heat rate of more than 2.5 times higher compared to the reference case. This optimization has highlighted a preferential zone in which heat transfers are maximum. The work has also dealt with the e ect of the shape of the wires and the effect of the shape of menisci on the transfer, showing that it is preferable to work with hydrophobic materials and with cylindrical wires
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Pohl, Julien. "Turbine stator well heat transfer and design optimisation using numerical methods." Thesis, University of Leeds, 2016. http://etheses.whiterose.ac.uk/15939/.

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Engine components are commonly exposed to air temperatures exceeding the thermal material limit in order to increase the overall engine performance and to maximise the engine specific fuel consumption. To prevent the overheating of the materials and thus the reduction of the component life, an internal flow system must be designed to cool the critical engine parts and to protect them. As the coolant flow is bled from the compressor and not used for the combustion an important goal is to minimise the amount of coolant in order to optimise the overall engine performance. Predicting the metal temperatures is of paramount importance as they are a major factor in determining the component stresses and lives. In addition, as modern engines operate in ever harsher conditions due to efficiency requirements, the ability to predict thermo-mechanical displacements becomes very relevant: on the one hand, to prevent damage of components due to excessive rubbing, on the other hand, to understand how much air is flowing internally within the secondary air system for cooling and sealing purposes, not only in the design condition but throughout the engine life-span. In order to achieve this aero-engine manufacturers aim to use more and more accurate numerical techniques requiring multi-physics models, including thermo-mechanical finite elements and CFD models, which can be coupled in order to investigate small variations in temperatures and displacements. This thesis shows a practical application and extension of a numerical methodology for predicting conjugate heat transfer. Extensive use is made of FEA (solids) and CFD (fluid) modeling techniques to understand the thermo-mechanical behaviour of a turbine stator well cavity, due to the interaction of cooling air supply with the main annulus. Previous work based on the same rig showed diffculties in matching predictions to thermocouple measurements near the rim seal gap. In this investigation, further use is made of existing measurements of hot running seal clearances in the rig. The structural deflections are applied to the existing model to evaluate the impact in flow interactions and heat transfer. Furthermore, for one test case unsteady CFD simulations are conducted in order to take into account the flow unsteadiness in the heat transfer predictions near the rim. In addition to a baseline test case without net ingestion, a case simulating engine deterioration with net ingestion is validated against the available test data, also taking into account cold and hot running seal clearances. Furthermore an additional geometry with a stationary deflector plate is modelled and validated for the same flow cases. Experiments as well as numerical simulations have shown that due to the deflector plate the cooling flow is fed more directly into the disc boundary layer, allowing more effective use of less cooling air, leading to improved engine efficiency. Therefore, the deflector plate geometry is embedded in a CFD-based automated optimisation loop to further reduce the amount of cooling air. The optimisation strategy concentrates on a flexible design parameterisation of the cavity geometry with deflector plate and its implementation in an automatic 3D meshing system with respect of finally executing an automated design optimisation. Special consideration is given to the flexibility of the parameterisation method in order to reduce design variables to a minimum while also increasing the design space flexibility & generality. The parameterised geometry is optimised using a metamodel-assisted approach based on regressing Kriging in order to identify the optimum position and orientation of the deflector plate inside the cavity. The outcome of the optimisation is validated using the benchmarked FEA-CFD coupling methodology.
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Mujanayi, Katumba Jean-Marc. "Thermal management and optimisation of heat transfer from discrete heat sources." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/61318.

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These days, the cooling of new generation electronic servers is a challenge due to the immense heat generated by them. In order to avoid overheating caused by the important rise in temperature appropriate cooling procedures must be used in order to meet the thermal requirement. The current study aims at addressing the issue of overheating in this field, and focuses on the thermal management of electronic devices modelled as a discrete heat sources (mounted in a rectangular cavity) with uniform heat flux applied from the bottom. A review of the literature published regarding the convective heat transfer from heated sources as well as a thorough background on the theory of the cooling of discrete sources by forced convection in rectangular channel is provided in this study. It was showed that the heat transfer performance in channel is strongly influenced by the geometric configurations of heat sources. Therefore, the arrangement and geometric optimisation are the main considerations in the evaluation of thermal performance. Unlike experimental methods that were carried out widely in the past, which provided less cost-effective and more time-consuming means of achieving the same objective, in this study we first explore the possibilities and the advantages of using the CD-adapco's CFD package Star-CCM+ to launch a three dimensional investigation of forced convection heat transfer performance in a channel mounted with equidistant heatgenerating blocks. Numerical results were validated with available experimental data, and showed that the thermal performance of the heat transfer increases with the strength of the flow. The second objective was to maximise the heat transfer density rate to the cooling fluid and to minimise both the average and the maximum temperature in the channel by using the numerical optimisation tool HEEDS/Optimate+. The optimal results showed that better thermal performance was not obtained when the heated sources followed the traditional equidistance arrangement, but was achieved with a specific optimal arrangement under the total length constraint for the first case. Subsequently, for the second case study, on the volume constraints of heat sources, the results proved that optimal configurations that maximise the heat transfer density rate were obtained with a maximum of either the height-to-length ratio or the height-to-width ratio. It was concluded that the heat transfer rate to the cooling fluid increases significantly with the Reynolds number and the optimal results obtained numerically are found to be fairly reliable.
Dissertation (MSc)--University of Pretoria, 2016.
Mechanical and Aeronautical Engineering
MSc
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Alfama, Marco. "Theoretical and experimental investigation of the heat transfer and pressure drop optimisation on textured heat transfer surfaces." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/62792.

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Modern nuclear reactors still use Zirconium-4 Alloy (Zircaloy®) as the cladding material for fuel elements. A substantial amount of research has been done to investigate the boiling heat transfer behind the cooling mechanism of the reactor. Boiling heat transfer is notoriously difficult to quantify in an acceptable manner and many empirical correlations have been derived in order to achieve some semblance of a mathematical model. It is well known that the surface conditions on the heat transfer surface plays a role in the formulation of the heat transfer coefficient but on the other hand it also has an effect on the pressure drop alongside the surface. It is therefore necessary to see whether there might be an optimum surface roughness that maximises heat transfer and still provides acceptably low pressure drop. The purpose of this study was to experimentally measure pressure drop and heat transfer associated with vertical heated tubes surrounded by flowing water in order to produce flow boiling heat transfer. The boiling heat transfer data was used to ascertain what surface roughness range would be best for everyday functioning of nuclear reactors. An experimental set-up was designed and built, which included a removable panel that could be used to secure a variety of rods with different surface roughnesses. The pressure drop, surface temperature, flow rate and heat input measurements were taken and captured in order to analyse the heat transfer and friction factors. Four rods were manufactured with different roughnesses along with a fifth rod, which remained standard. These rods were tested in the flow loop with water in the upward flow direction. Three different system mass flow rates were used: 0kg/s, 3.2kg/s and 6.4kg/s. Six repetitions were done on each rod for the tests; the first repetition was not used in the results since it served the purpose to deaerate the water in the flow loop. The full range of the power input was used for each repetition in the tests. For the heat transfer coefficient at a system mass flow rate of 3.2kg/s, satisfactory comparisons were made between the test results and those found in literature with an average deviation of 14.53%. At 6.4kg/s system mass flow rate the comparisons deviated on average 55.45%. The velocity of the fluid in the test section was calculated from the pressure drop and was validated using separate tests. The plain rod, with no added roughness, was found to be the optimal surface roughness which is what is used in industry today. The flow loop was in need of a couple of redesigns in order to produce more accurate results. Future work suggestions include adding more rods in the test section in order to investigate the nature of heat transfer in a rod bundle array as well as implementing all the suggested changes listed in the conclusion.
Dissertation (MEng)--University of Pretoria, 2017.
Mechanical and Aeronautical Engineering
MEng
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Barrut, Bertrand. "Etude et optimisation du fonctionnement d’une colonne airlift à dépression - Application à l’aquaculture." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20125.

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L'objectif de ce travail était d'étudier les trois fonctions d'une colonne airlift sous dépression qui sont le pompage, les transferts gaz-liquide et l'extraction de matières particulaires par moussage-écumage. Le champ d'application ciblé concernait principalement le traitement des eaux aquacoles incluant l'extraction et la concentration de microalgues naturelles ou de culture. Chacune des fonctions a été étudiée séparément afin d'évaluer les capacités de l'airlift dans différentes conditions. L'étude de la fonction pompage a montré l'importance de la nature de l'eau, du type de diffuseur d'air, du débit gazeux injecté et du niveau de dépression appliqué. En eau douce, une forte coalescence des bulles est observée. Elle a pour conséquence une rétention gazeuse plus faible qu'en eau de mer. Le débit d'eau fourni par la colonne apparaît ainsi supérieur en eau douce (30 à 35 m3.h-1 contre seulement 10 à 20 m3.h-1 en eau de mer pour 5 m3.h-1 d'air injecté). A l'inverse, la hauteur de refoulement disponible est plus élevée en eau de mer (jusqu'à 0.8 m) qu'en eau douce (0.6 m maximum). Pour des circuits d'aquaculture où la perte de charge est faible, l'airlift est un système de pompage économique qui permet de réduire d'environ 40 % la consommation d'énergie par rapport à celle de pompes centrifuges. La colonne airlift présente également des capacités de transferts de matière comparables à celles de systèmes conventionnels. Les valeurs de KLa calculées pour la désorption du CO2 et comprises entre 0.002 et 0.01 s-1, sont environ quatre fois inférieures à celles obtenues pour le transfert d'oxygène par aération dans des conditions comparables. Les efficacités de transfert sont comprises entre 0.02 et 0.023 Kg.KW.h-1 pour le CO2 et entre 1.52 et 1.8 Kg.KW.h-1 pour l'O2. Les vitesses de transfert dépendent significativement du débit d'air, de la température, de la taille moyenne des bulles et de la présence d'aliments dans le bassin d'élevage. Elles sont peu affectées par la salinité, le niveau de dépression, la longueur du tube interne d'échange et le débit d'eau. Enfin, les capacités de séparation par moussage-écumage évoluent de façon positive quand le débit d'air et la taille des bulles sont réduits. L'efficacité globale d'extraction diminue avec l'augmentation de la concentration des produits extraits qui peut atteindre 130 fois la concentration initiale. La colonne à dépression apparaît ainsi comme un système multifonctionnel performant, même si l'efficacité maximale, pour chacune des fonctions, correspond à des conditions opératoires différentes. Ce procédé ouvre des perspectives de développement intéressantes dans des secteurs variés (de l'aquaculture au traitement des eaux industrielles)
The aim of this work was to study the three functions of a vacuum airlift, which are water pumping, mass transfer and foam fractionation. The investigations mainly focused on the treatment of fish culture water and on phytoplancton harvesting. Each function was studied separately, in order to assess the performance of the vacuum airlift with specific operating conditions. By studying the airlift pump, the effects of water and diffuser types, air injection conditions and depression level were shown. In fresh water, bubble coalescence was observed, which reduced gas holdup compared to sea water. Consequently, the water flow of the vacuum airlift appeared higher in fresh water than in sea water (30 to 35 m3.h-1 against 10 to 20 m3.h-1) for the same air flow rate (5 m3.h-1). Conversely, the available lift height was higher in sea water (up to 0.8 m) than in fresh water (0.6 m maximum). For low head aquaculture systems, the vacuum airlift may be an economical pumping system which allows a 40 % energy saving compared to centrifugal pumps. The vacuum airlift had a mass transfer efficiency similar to other gas transfer systems. The KLa values calculated for CO2 desorption ranged between 0.002 and 0.01 s-1. They were four times lower than those obtained for oxygen transfer in similar conditions. Mass transfer efficiencies ranged between 0.02 and 0.023 Kg.KW.h-1 for CO2 and between 1.52 and 1.8 Kg.KW.h-1 for O2. Mass transfer velocities significantly depended on air flow rate, water temperature, average bubble size and the presence of feed in the rearing tank. They are weakly depending on salinity, depression level, inner tube length or water flow. At last, foam fractionation increased when air flow and bubble size were reduced. The extraction efficiency decreased when the concentration of the extracted product increased (maximal concentration factor around130). The vacuum airlift appeared to be as a high-performance multifunctional system, even if the maximal efficiency for each of the functions corresponds to different operating conditions. This process could be used in a large scope of fields ranging from aquaculture to industrial water treatment
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Lindqvist, Camilla. "Genetic Engineering of T Lymphocytes for Cancer Immunotherapy : Optimisation of Gene Transfer." Thesis, Uppsala University, Department of Medical Biochemistry and Microbiology, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7139.

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T lymphocytes can be rendered specific against a wide range of antigens by the genetic transfer of a chimeric receptor, a fusion between the antigen-binding domain of an antibody and the signalling domain of a T cell receptor. The use of such chimeric T lymphocytes has shown promising results for cancer therapy. Previous experiments in our laboratory have shown low rates of gene transfer using retroviral vectors. In this study, investigations have been done to increase the number of genetically modified cells. Different enhancers such as PLL and polybrene have previously been used in combination with retroviral transduction. The optimal retroviral protocol in this study showed to be the use of retrovectors produced with twice the normal concentration of the plasmids encoding env and gag-pol rather than the use of the enhancers. A 6-day pre stimulation of T lymphocytes prior transduction together with a centrifugation step increased the rate of modified cells even further. Alternative approaches of gene transfer were also investigated, including plasmid transfection and adenoviral transduction. While transfection protocols yielded low numbers of modified cells, adenoviral vectors showed the highest rate of gene transfer.


Cancer är den sjukdom som idag, efter hjärt-kärl-sjukdomar, kräver flest dödsfall i i-länder. Som en alternativ behandlingsmetod mot cancer pågår just nu forskning om genetiskt förbättrade immunceller, s.k. chimära T lymfocyter, skulle kunna användas för att döda tumörceller. De chimära cellerna är utrustade med en konstgjord receptor som är en fusion av en antikropp och en signalkedja. Det gör att cellerna kan riktas mot ett brett urval av cancertyper. Att få cellerna att ta upp generna som behövs för den konstgjorda receptorn har visats sig vara problematiskt. Den här studien har därför som mål att förbättra cellernas förmåga att ta upp gener. För detta har vi använt oss av retrovirus- och adenovirus-system tillsammans med försök att få cellerna att spontant ta upp generna, sk. plasmid-transfektion. Studien har visat att de båda virussystemen ger högst antal modifierade celler. Olika substanser som tidigare har visat sig förhöja graden av gentillförsel har testats, men vår studie har visat att tillverkningen av virusvektorerna har större påverkan på resultaten än någon av de olika hjälpmedlen.

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Vicatos, George. "Heat and mass transfer characteristics: design and optimisation of absorption refrigeration machines." Doctoral thesis, University of Cape Town, 1995. http://hdl.handle.net/11427/17476.

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Bibliography: pages 205-209.
An extensive literature study on the subject of absorption refrigeration has revealed that there is no proven methodology that can be used to design, optimise and size a plant. On the contrary there are numerous methods which analyse the performance of an existing plant from collected data. These methods however, do not provide any means of predicting how the analysed plant would perform if one or more of its working conditions should change. This work provides a complete design for an ammonia-water absorption refrigeration plant. The ranges of the working conditions in the evaporator and condenser are from -5°C to -55°C and from 5°C to 45°C respectively. For any combination of temperatures within these ranges, the temperature of the generator is optimised for maximum performance of the plant. Depending on the refrigeration capacity, the components are sized and designed. The proper design of the various components takes into account both heat and mass transfer correlations, something which has not been considered in the past as a necessary step for absorption refrigeration machines. Literature indicates that there is a vast amount of research into the absorption of gases into liquids and two-phase flows through tubes of various sections. The correlations cited in these studies have been used in designing the absorption column, evaporator and generator. The proposed optimisation method is a novel approach in designing a plant and stems from the fact that the performance of the absorption refrigerator reaches a maximum at a specific generator temperature. For this, optimisation curves have been developed, which for a particular combination of evaporator and cooling environment temperatures, both the optimum generator temperature and the maximum performance of the plant are predicted. The equations used in the computerised simulation procedure are based on the well-established enthalpy-concentration chart for the ammonia-water mixtures. Thus the properties of the mixture at various points in the plant are accurately predicted. Published computerised procedures in the past have been proven inaccurate in predicting the properties of the mixtures at near pure-ammonia concentrations. The validity of the simulation model is verified by tests performed on a laboratory size absorption plant. The plant was built from design parameters predicted by the simulation model for a refrigeration capacity of 1 kW at -l5°C evaporator coil and 25°C condensate temperatures. Thereafter the unit was operated for a range of evaporator conditions while the generator temperature was varied.
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Books on the topic "Transfer Optimisation"

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Desideri, Umberto, Giampaolo Manfrida, and Enrico Sciubba, eds. ECOS 2012. Florence: Firenze University Press, 2012. http://dx.doi.org/10.36253/978-88-6655-322-9.

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The 8-volume set contains the Proceedings of the 25th ECOS 2012 International Conference, Perugia, Italy, June 26th to June 29th, 2012. ECOS is an acronym for Efficiency, Cost, Optimization and Simulation (of energy conversion systems and processes), summarizing the topics covered in ECOS: Thermodynamics, Heat and Mass Transfer, Exergy and Second Law Analysis, Process Integration and Heat Exchanger Networks, Fluid Dynamics and Power Plant Components, Fuel Cells, Simulation of Energy Conversion Systems, Renewable Energies, Thermo-Economic Analysis and Optimisation, Combustion, Chemical Reactors, Carbon Capture and Sequestration, Building/Urban/Complex Energy Systems, Water Desalination and Use of Water Resources, Energy Systems- Environmental and Sustainability Issues, System Operation/ Control/Diagnosis and Prognosis, Industrial Ecology.
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Schulte-Werning, Burkhard, Rémi Grégoire, Antonio Malfatti, and Gerd Matschke, eds. TRANSAERO — A European Initiative on Transient Aerodynamics for Railway System Optimisation. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-540-45854-8.

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Serrano, Maria Isabel Roldán. Concentrating Solar Thermal Technologies: Analysis and Optimisation by CFD Modelling. Springer London, Limited, 2017.

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Serrano, Maria Isabel Roldán. Concentrating Solar Thermal Technologies: Analysis and Optimisation by CFD Modelling. Springer, 2016.

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Serrano, Maria Isabel Roldán. Concentrating Solar Thermal Technologies: Analysis and Optimisation by CFD Modelling. Springer, 2018.

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Menasché, Philippe. Stem Cell Therapy Post-AMI. Oxford University Press, 2011. http://dx.doi.org/10.1093/med/9780199544769.003.0010.

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• Experimental studies suggest that bone marrow-derived stem cells can improve function of infarcted myocardium• This benefit seems to involve paracrine signalling and limitation of left ventricular remodelling rather than true regeneration of cardiomyocytes from donor cells• These experimental findings have been translated in the clinical setting into significant, although moderate, improvements in cardiac function and LV remodelling but the extent to which these benefits impact on event-free long term survival remains to be determined• Optimisation of this therapeutic strategy will require a more comprehensive characterisation of cell functionality and an improvement in the methods used in cell transfer, engraftment, survival and integration.
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Schulte-Werning, Burkhard, Remi Gregoire, Antonio Malfatti, and Gerd Matschke. Transaero: A European Initiative on Transient Aerodynamics for Railway System Optimisation. Springer London, Limited, 2013.

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Burkhard, Schulte-Werning, ed. TRANSAERO: A European initiative on transient aerodynamics for railway system optimisation. Berlin: Springer, 2002.

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Schulte-Werning, Burkhard, Remi Gregoire, Antonio Malfatti, and Gerd Matschke. TRANSAERO - A European Initiative on Transient Aerodynamics for Railway System Optimisation. Springer Berlin Heidelberg, 2010.

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Onvural, Raif. Data Communications and their Performance (IFIP International Federation for Information Processing). Springer, 1995.

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Book chapters on the topic "Transfer Optimisation"

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Joy, Tinu Theckel, Santu Rana, Sunil Kumar Gupta, and Svetha Venkatesh. "Flexible Transfer Learning Framework for Bayesian Optimisation." In Advances in Knowledge Discovery and Data Mining, 102–14. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-31753-3_9.

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Ramachandran, Anil, Sunil Gupta, Santu Rana, and Svetha Venkatesh. "Information-Theoretic Transfer Learning Framework for Bayesian Optimisation." In Machine Learning and Knowledge Discovery in Databases, 827–42. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-10928-8_49.

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Ramachandran, Anil, Sunil Gupta, Santu Rana, and Svetha Venkatesh. "Selecting Optimal Source for Transfer Learning in Bayesian Optimisation." In Lecture Notes in Computer Science, 42–56. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-97304-3_4.

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Ismaeel, Muyassar E., N. Kapur, Z. Khatir, and H. M. Thompson. "Robust Optimisation of Serpentine Fluidic Heat Sinks for High-Density Electronics Cooling." In Advances in Heat Transfer and Thermal Engineering, 583–90. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4765-6_101.

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Vasile, Massimiliano. "Combining Evolution Programs and Gradient Methods for WSB Transfer Optimisation." In Applied Optimization, 85–102. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4757-3752-3_6.

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Kisha, Wigdan, and David Hann. "Numerical Optimisation of the Regenerator of a Multi-stage Travelling Wave Thermoacoustic Electricity Generator." In Advances in Heat Transfer and Thermal Engineering, 459–63. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-4765-6_79.

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Mirjalili, Seyedehzahra, Hongyu Zhang, Seyedali Mirjalili, Stephan Chalup, and Nasimul Noman. "A Novel U-Shaped Transfer Function for Binary Particle Swarm Optimisation." In Advances in Intelligent Systems and Computing, 241–59. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3290-0_19.

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Arzmi, Mohd Hafiz, Anwar P. P. Abdul Majeed, Rabiu Muazu Musa, Mohd Azraai Mohd Razman, Hong-Seng Gan, Ismail Mohd Khairuddin, and Ahmad Fakhri Ab. Nasir. "The Classification of Breast Cancer: The Effect of Hyperparameter Optimisation Towards the Efficacy of Feature-Based Transfer Learning Pipeline." In Deep Learning in Cancer Diagnostics, 15–19. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8937-7_3.

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Catthoor, Francky, Sven Wuytack, Eddy De Greef, Florin Balasa, Lode Nachtergaele, and Arnout Vandecappelle. "Optimisation of Global Data Transfer and Storage Organisation for Decreased Power and Area in Custom Data-Dominated Real-Time Systems." In Custom Memory Management Methodology, 1–15. Boston, MA: Springer US, 1998. http://dx.doi.org/10.1007/978-1-4757-2849-1_1.

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Murphy, A., R. Sibbet, and C. Ramshaw. "PROCESS INTENSIFICATION: FLUID BED HEAT TRANSFER." In Process Optimisation, 41–52. Elsevier, 1987. http://dx.doi.org/10.1016/b978-0-85295-205-4.50008-6.

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Conference papers on the topic "Transfer Optimisation"

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Daun, Kyle J., John R. Howell, and David P. Morton. "Optimisation of radiant enclosures through non-linear programming." In International Heat Transfer Conference 12. Connecticut: Begellhouse, 2002. http://dx.doi.org/10.1615/ihtc12.4860.

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Alarcon, Mariano García, Francisco Alhama, Carlos F. Gonzalez-Fernandez, Pascual Martí Montrull, and Antonio Pérez Garrido. "Optimisation of a longitudinal rectangular fin-wall assembly." In International Heat Transfer Conference 12. Connecticut: Begellhouse, 2002. http://dx.doi.org/10.1615/ihtc12.1090.

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Lasance, C. J. M. "OPTIMISATION OF FORCED CONVECTION COOLED ELECTRONIC SYSTEMS: AN EXPERIMENTAL STUDY." In International Heat Transfer Conference 9. Connecticut: Begellhouse, 1990. http://dx.doi.org/10.1615/ihtc9.480.

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Kurek, Maciej, Marc Peter Deisenroth, Wayne Luk, and Timothy Todman. "Knowledge Transfer in Automatic Optimisation of Reconfigurable Designs." In 2016 IEEE 24th Annual International Symposium on Field-Programmable Custom Computing Machines (FCCM). IEEE, 2016. http://dx.doi.org/10.1109/fccm.2016.29.

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Kishimoto, Masashi, Marina Lomberg, Enrique Ruiz-Trejo, and Nigel Brandon. "Towards the Microstructural Optimisation of Solid Oxide Fuel Cell Electrodes." In The 15th International Heat Transfer Conference. Connecticut: Begellhouse, 2014. http://dx.doi.org/10.1615/ihtc15.fcl.009440.

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Ameel, Bernd, Joris Degroote, Henk Huisseune, Jan Vierendeels, and Michel De Paepe. "Fin Efficiency and the Optimisation of X-Shaped Louvered Fins." In The 15th International Heat Transfer Conference. Connecticut: Begellhouse, 2014. http://dx.doi.org/10.1615/ihtc15.hex.009085.

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Stevens, T., F. Rogiers, and M. Baelmans. "OPTIMISATION OF MICRO-CHANNEL HEAT SINK GEOMETRY." In Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p14.170.

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Dixon, Jeffrey A., Ivan L. Brunton, Timothy J. Scanlon, Grzegorz Wojciechowski, Vassilis Stefanis, and Peter R. N. Childs. "Turbine Stator Well Heat Transfer and Cooling Flow Optimisation." In ASME Turbo Expo 2006: Power for Land, Sea, and Air. ASMEDC, 2006. http://dx.doi.org/10.1115/gt2006-90306.

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CFD methods are increasingly being used in gas turbine secondary flow system analysis and design to establish flow distribution and convective heat transfer in internal cavities. A key area of concern is the complex flows adjacent to turbine disc rims, where undesirable levels of hot annulus gas would be ingested were it not for the cooling air supplied to limit its effects on disc rim and blade fixing temperature levels. This paper presents results from a study to investigate the practicality of applying this method to the flow distribution and heat transfer in the disc rim sealing cavity between two adjacent turbine stages, referred to here as a turbine stator well. Also described is the test facility designed to validate the CFD analysis and some preliminary results from comparisons of 3D flow solutions, with measured test data.
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Hajek, Jiri, Petr Stehlik, and Jaroslav Oral. "CFD BASED DESIGN OPTIMISATION OF INDUSTRIAL HEAT TRANSFER EQUIPMENT." In CHT-04 - Advances in Computational Heat Transfer III. Proceedings of the Third International Symposium. Connecticut: Begellhouse, 2004. http://dx.doi.org/10.1615/ichmt.2004.cht-04.220.

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Kim, H., and C. T. Fenton. "APPLICATION OF STRUCTURAL OPTIMISATION TO TURBINE DISC DESIGN." In Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p22.150.

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