Дисертації з теми "Magnetic sheet"
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Stechow, Adrian von [Verfasser]. "Current sheet dynamics during driven magnetic reconnection / Adrian von Stechow." Greifswald : Universitätsbibliothek Greifswald, 2015. http://d-nb.info/1073164306/34.
Повний текст джерелаSu, Ruitao. "Multi-Field Physics for the Synthesis of Carbon Nanotube Yarn and Sheet." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1439310862.
Повний текст джерелаWilson, Fiona. "Equilibrium and stability properties of collisionless current sheet models." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3548.
Повний текст джерелаAkcaoglu, Fehmi Umit. "Investigating The Effect Of Deformation And Annealing Texture On Magnetic Anisotropy In Low-c Steel Sheets By Magnetic Barkhausen Noise Method." Master's thesis, METU, 2013. http://etd.lib.metu.edu.tr/upload/12615569/index.pdf.
Повний текст джерелаscanning electron microscopy
hardness and tension tests were performed
and texture was determined by X-Ray diffraction method. The results were compared, evaluated and discussed to establish relationship between texture and magnetic Barkhausen Noise emission.
Matsui, Tatsuki. "Kinetic theory and simulation of collisionless tearing in bifurcated current sheets." Diss., University of Iowa, 2008. http://ir.uiowa.edu/etd/38.
Повний текст джерелаSouza, Pedro Victor Brondino Duarte de. "Desenvolvimento de um subsistema non-real-time para o gerenciamento de dispositivos periféricos e desenvolvimento de interfaces gráficas." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/76/76132/tde-21102016-140615/.
Повний текст джерелаMagnetic Resonance (MR) is a very versatile technique, since it is used in many research areas such as biology, physics, chemistry, engineering and medicine. Despite this, the cost of the equipment and its physical restrictions in some experiments constitute a serious drawback. To minimize these problems, the CIERMag research team is developing multipurpose MR equipment and, to complement this equipment, this work develops a non-real-time subsystem that manages the peripheral devices of the experiment. It was proposed a network of devices controlled by a Raspberry Pi as its central element, which is connected to the terminal computer of the system. The protocol adopted for this was Ethernet via Local Area Network (LAN); communication with peripheral transducers was performed with the Serial Peripheral Interface (SPI). With the objective to be able to manage any type of device, we created parameter sets based on Transducer Electronic Data Sheet (TEDS), defined in the IEEE 1451 standard, so each device, normally a transducer, has its own parameter set. We created two software interfaces: one developed with Python and the other is a HTML web interface. Both have the same functionalities: a TEDS editor and manager, a graphical visualization of sensor measurements and also an actuator interface.
Kamal, Manish. "A uniform pressure electromagnetic actuator for forming flat sheets." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1127230699.
Повний текст джерелаTitle from first page of PDF file. Document formatted into pages; contains xxi, 261 p.; also includes graphics (some col.). Includes bibliographical references (p. 244-254). Available online via OhioLINK's ETD Center
Talowski, Catherine. "Contribution à l'amélioration des tôles magnétiques non orientées utilisées en électrotechnique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0105.
Повний текст джерела純士, 北尾, та Junji Kitao. "ヒステリシス特性を考慮した有限要素磁界解析の実用化に関する研究". Thesis, https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13044990/?lang=0, 2017. https://doors.doshisha.ac.jp/opac/opac_link/bibid/BB13044990/?lang=0.
Повний текст джерелаIn order to achieve the highly accurate analysis of an iron loss for electric machines, this paper proposes finite element magnetic field analyses taking account of the hysteretic property by using the play model. As a consequence, it is verified that the proposed method can accurately estimate an iron loss of a magnetic materials and decrease computational costs. Furthermore, this paper investigates the influence of the hysteretic property in finite element magnetic field analyses to demonstrate its effectiveness.
博士(工学)
Doctor of Philosophy in Engineering
同志社大学
Doshisha University
Pera, Thierry. "Lois d'aimantation anisotropes et non linéaires : modélisation et validation expérimentale." Grenoble INPG, 1994. http://www.theses.fr/1994INPG0038.
Повний текст джерелаBungey, Timothy N. "Topological configurations of coronal magnetic fields and current sheets." Thesis, University of St Andrews, 1996. http://hdl.handle.net/10023/14021.
Повний текст джерелаAndriyas, Tushar. "Particle Dynamics and Resistivity Characteristics in Bifurcated Current Sheets." DigitalCommons@USU, 2013. http://digitalcommons.usu.edu/etd/1513.
Повний текст джерелаNozawa, Satoshi. "Three-dimensional magnetohydrodynamic simulation of nonlinear magnetic buoyancy instability of flux sheets with magnetic shear." 京都大学 (Kyoto University), 2006. http://hdl.handle.net/2433/144351.
Повний текст джерела0048
新制・論文博士
博士(理学)
乙第11770号
論理博第1464号
新制||理||1442(附属図書館)
23825
UT51-2006-C692
名古屋大学大学院理学研究科宇宙理学第2類
(主査)教授 柴田 一成, 教授 長田 哲也, 助教授 戸谷 友則
学位規則第4条第2項該当
Harrison, Michael George. "Equilibrium and dynamics of collisionless current sheets." Thesis, St Andrews, 2009. http://hdl.handle.net/10023/705.
Повний текст джерелаAbabsa, Mohamed Lamine. "Caractérisation de composants magnétiques et diélectriques pour les machines électriques tournantes très haute température High temperature magnetic characterization using an adapted Epstein frame High temperature characterization of electrical steels using an adapted Epstein frame." Thesis, Artois, 2018. http://www.theses.fr/2018ARTO0205.
Повний текст джерелаIn this thesis work, we carried out a magnetic characterization measurements (hysteresis cycles, losses, H_c...) at very high temperatures up to 600 °C, using a characterization device adapted to these extremes conditions which is an Epstein frame that we have developed and implemented. Its validation is verified with a standard frame at ambient temperature. The measurements are performed by two types of ferromagnetic sheets mostly used: FeSi GO and NO. The results show a decrease with temperature in iron losses and different parameters which define the hysteresis cycle, and expose a similarity between the variation of coercive field and the losses per cycle. Subsequently, we described the losses and the coercive field as a function of temperature and frequency. That is done by a linear empirical equations in case of saturated materials and by an extension at high temperature of the Bertotti equation via an identification of its parameters in case of unsaturated materials. In a second phase, by measuring the voltage of partial discharge and of the electrical breakdown we characterized the insulation of a conductor intended to be used at a high temperature covered by mica; this later has an inorganic origin. These results show that the inhomogeneity of this insulation along of the conductor causes destructive discharges without appearance of partial discharges. This kind of wire consists of copper surrounded by a thin nickel layer and this later has been characterized magnetically during our work
Bowness, Ruth. "Current sheets in the solar corona : formation, fragmentation and heating." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/2081.
Повний текст джерелаEriksson, Elin. "3D Magnetic Nulls and Regions of Strong Current in the Earth's Magnetosphere." Licentiate thesis, Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-292742.
Повний текст джерелаSpornic, Sorin Aurel. "Automatisation de bancs de caractérisation 2D des tôles magnétiques : influence des formes d'onde sur les mécanismes d'aimantation." Phd thesis, Grenoble INPG, 1998. http://www.theses.fr/1998INPG0154.
Повний текст джерелаThe aim of this dissertation is the study of soft magnetic materials under arbitrary vector 2D excitation, turning into the sheet plane. Such conditions appear, for example, inside rotating electric machines or inside three-phase transformers. Previous work has used simplified flux density paths, such as circles or ellipsis covered at constant angular speed, that cannot completely describe the materials'behaviour. The first part of this work was accomplished by the élaboration of a complète 2D magnetic characterisation device. The two RSST of LEG received a computerised driving System (CDS), which clearly improved the measurements accuracy and stability and enlarged the frequency domain. The CDS digital waveform control part allowed for the first time the obtention of complex flux density paths. Finally, the measurement System was completely automated. Thanks to the CDS, the investigation of some soft magnetic materials, such as NiFe, CoFe and NO SiFe, was realised. - First, thèse three materials were characterised under circular flux. The magnetic behaviour was studied with respect to flux and frequency level and also the réversible behaviour, in order to get an anisotropy image. The complète atypical losses évolution could be seen in this manner in the case of NiFe, and a prédiction model was validated. The vector law B(H) was also analysed and a model for the field strength évolution was attempted. - Then this study was enlarged to waveforms observed inside a three-phase induction motor. A2D losses estimation was tested. Finally, the importance of the derivative of the flux density vector with respect to time was highlighted on the magnetic behaviour and the magnetic losses development
Cohen, Joel (Joel A. ). "Excitation of forced ion acoustic waves, large plasma sheets, and magnetic field fluctuations over Gakona, Alaska." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53280.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 47-48).
Two research subjects: (1) excitation of "forced ion acoustic waves", and (2) "simultaneous excitation of plasma density fluctuations and geomagnetic field fluctuations" are reported in my M.S. thesis. The data was acquired in our experiments conducted at Gakona, Alaska from summer 2007 to winter 2008, using DoD/NSF-funded HAARP facilities and our own optical (ASIS) and radio instruments (VLF receiving system of IRIS) aided by GPS satellites as well as AMISR radar at Poker Flat, Alaska. We suggest that "Forced ion acoustic waves" detected by MUIR radar on Oct. 29 during 6:20-6:30 UT arise from keV electron precipitation associated with the occurrence of green aurora. Our work shows, for the first time, that MUIR radar is suitable for probing naturally occurring space plasma processes and not limited to HF heater-induced effects. This would extend the usage of MUIR for the investigation of space weather together with AMISR radar at Poker Flat, to advance our knowledge in space plasma turbulence. The research on "simultaneous excitation of plasma density fluctuations and geomagnetic field fluctuations" is an extension of my B.S. thesis research on thermal filamentation instability, which started in our summer Gakona experiments in 2005. Large plasma sheets (also known as sheet-like filaments) can be excited by HF O-mode and X-mode heater waves via thermal filamentation instability.
(cont.) The dominant nonlinearity is provided by the differential Joule heating acting on electrons, which subsequently gives rise to a cross-field thermal pressure force, to concomitantly generate spatially varying plasma density fluctuations and geomagnetic field fluctuations. It is interesting to find that the fractional density fluctuations are approximately equal to the fractional magnetic field fluctuations. This gives us the theoretical basis to use ground-based magnetometer measurements to infer the density fluctuations in space plasma turbulence. Such a remote sensing technique for probing the space plasma is much more effective and economic than using a beacon satellite.
by Joel Cohen.
S.M.
Ball, David, Feryal Özel, Dimitrios Psaltis, Chi-Kwan Chan, and Lorenzo Sironi. "The Properties of Reconnection Current Sheets in GRMHD Simulations of Radiatively Inefficient Accretion Flows." IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627036.
Повний текст джерелаHudson, Frederick Michael Lewis. "NMR characterization guides the design of beta hairpins and sheets while providing insights into folding cooperativity and dynamics /." Thesis, Connect to this title online; UW restricted, 2006. http://hdl.handle.net/1773/8639.
Повний текст джерелаJerems, Frank. "The magnetic and magnetoelastic properies of meld-spun MbFe2 based alloys and their temperature dependencies." Thesis, University of Hull, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484232.
Повний текст джерелаCester, Christophe. "Étude des pertes magnétiques supplémentaires dans les machines asynchrones alimentées par onduleur à modulation de largeur d'impulsion." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0068.
Повний текст джерелаKrings, Andreas. "Iron Losses in Electrical Machines - Influence of Material Properties, Manufacturing Processes, and Inverter Operation." Doctoral thesis, KTH, Elektrisk energiomvandling, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145243.
Повний текст джерелаQC 20140516
Mozetic, Halston José. "Micro estampagem e recozimento conjugado com campo induzido : efeitos no desempenho eletromagnético para chapas elétricas de grão não orientado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/109171.
Повний текст джерелаThis work presents and discusses the development and application of an annealing process together with the induced magnetic field. For this study development, the chosen material is the iron silicon, ABNT NM71-2000/ 35F 420M, due to the low trading costs and eases of purchase on the market. The process has the benefit of minimizing magnetic losses produced by conventional cutting the edge of the hot plates. To carry out the process system consists of a furnace, induction coil and power supply. The parameters used in the heat treatment are in the range of heating temperature to 910 ° C and a minimum magnetic induction in the range of about 80 to 1.5 T. The challenge of this work was in the fact that structure changes in the silicon iron, allied to inclusions of non-magnetizable materials, modify for worse the performance of magnetic cores. To obtain a structure that the magnetic field could permeate, the silicon iron alloys were selected to eliminate, at most, the presence of non-magnetizable materials, and only then consider a heat treatment process with magnetic induction to make the material suitable for use in cores of electrical machines. To improve the magnetic properties, an alignment of dipoles of the material, through induced magnetic field during annealing was intended. Annealing with induced magnetic field was carried out, observing the performance of the initial magnetic permeability of the samples, and subsequently measured with field saturation equipment. The results were correlated with the obtained data from the use of the FeSi, ABNT NM71-2000/35F 420M, with the same conditions of use and laboratory tests. From the scientific point of view, one of the contributions of this work is the influence of induced magnetic field during the heat treatment of the samples, since it was possible to verify a significant gain in the magnetic properties of the cores electrical machines during the performance tests. As a result of this work, the possibility of using annealing with magnetic induction was presented as a way to increase the permeability of a material with high carbon content, in this particular case, the silicon iron. This work suggests that it is possible to develop and improve the magnetic properties of iron and silicon with high performance also suggest that other applications where necessary increase in magnetic performance, this process can be applied.
Zoufalý, Marek. "Snížení zapínacího proudu transformátoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2016. http://www.nusl.cz/ntk/nusl-220367.
Повний текст джерелаPlíšek, Oldřich. "Analýza ztrát v železe malého asynchronního motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2018. http://www.nusl.cz/ntk/nusl-376984.
Повний текст джерелаBoughanmi, Walid. "Eco-conception des motorisations électriques : Application à la machine asynchrone." Thesis, Artois, 2012. http://www.theses.fr/2012ARTO0207/document.
Повний текст джерелаApproximately 300 million of electric motors, with average power range from 0.75 kW to 300 kW, are used in industry, infrastructure and large buildings. In addition, 30 millions are renewed each year. In France, the electrical power consumed by these motors is about two-third of the electrical energy consumed in the industry. Thus, an improvement, even small, of the environmental performance of each motor would provide substantial environmental benefits. Contrary to the conventional approaches, the eco-design of an electrical machine can introduce environmental aspects during the design of the machine, taking into account all phases of the life cycle from the extraction of raw materials to the decommissioning and the recycling. This approach has been applied in this study to design an electrical motor, which has a better global energetic eco-balance. Therefore, a Life Cycle Analysis (LCA) tool is used; it takes into account several impact criteria to avoid pollution transfers from one criterion to another. A first "Green" prototype motor made with a high energetic eco-efficiency was fabricated and tested. The study was dictated by the need to minimize its global environmental impact by using materials more environmentally friendly, but also in order to increase its energy efficiency. The prototype is made with a grain oriented steel sheets, an enameled wire polymerized by UV and without solvents, some plastic based on biopolymers and with eco-energetic bearings. The eco-designed motor has a high energetic eco-efficiency; its performance is increased by about 3 % compared to the standard motor and without increasing its mass
Halfar, Tomáš. "Zlepšení energetických parametrů asynchronních strojů malého výkonu." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219929.
Повний текст джерелаBerlin, Alexander. "Magnetic Pulse Welding of Mg Sheet." Thesis, 2011. http://hdl.handle.net/10012/6210.
Повний текст джерелаFu, Wei-Tsung, and 傅瑋宗. "Extended solutions for Harris Sheet magnetic field with Kappa velocity distribution." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/20363578369673096049.
Повний текст джерелаYu, Shih-hong, and 余世鴻. "Preparation and Electromagnetic Characterization of Magnetic Sheet Absorbers for High-Frequencies." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/19718879193204029510.
Повний текст джерела逢甲大學
航太與系統工程所
100
Absorbing sheets are fabricated by mixing magnetic powders with polyurethane for the purpose of electromagnetic wave absorption and shielding. The sheets possess characteristics such as flexibility, light-weighted and thin-thickness which are superior to traditional ferrite-tiles and metal shielding sheets. In this study, Mn-Zn ferrite particles, two types of high-permeability powders and Fe-Si-Cr particles are respectively mixed with aqueous-based polyurethane resin to fabricate microwave absorbing composites in different weight ratios. The scattering parameters S11 and S21 of the toroidal samples in a coaxial airline with a network analyzer are measured in the frequency range of 2 ~ 18 GHz. The maximum absorption and shielding effectiveness of composite absorbers are -8.52 dB(at 16 GHz), 10 dB (at 11 GHz) for the high-permeability E series and -7.51 dB(at 10 GHz), 10 dB (at 8.56 GHz) for the high-permeability powder C02 series, and -8.01 dB (at 5.2 GHz), 10 dB (at 6 GHz) for the Fe-Si-Cr absorbing sheets.
Zharkova, Valentina V., and Mykola Gordovskyy. "Particle Acceleration Asymmetry in a Reconnecting Nonneutral Current Sheet." 2009. http://hdl.handle.net/10454/3753.
Повний текст джерелаThe acceleration of electrons and protons caused by a super-Dreicer electric field directed along the longitudinal component By of the magnetic field is investigated. The three-component magnetic field in a nonneutral current sheet occurring at the top of the reconnecting flaring loops on the charged particle trajectories and energies is considered. Particle trajectories in the reconnecting current sheet (RCS) and their energy spectra at the point of ejection from the RCS are simulated from the motion equation for different sheet thicknesses. A super-Dreicer electric field of the current sheet is found to accelerate particles to coherent energy spectra in a range of 10-100 keV for electrons and 100-400 keV for protons with energy slightly increasing with the sheet thickness. A longitudinal By component was found to define the gyration directions of particles with opposite charges toward the RCS midplane, i.e., the trajectory symmetry. For the ratio By/Bz < 10-6 the trajectories are fully symmetric, which results in particle ejection from an RCS as neutral beams. For the ratio By/Bz > 10-2 the trajectories completely lose their symmetry toward the RCS midplane, leading to the separation of particles with opposite charges into the opposite halves from an RCS midplane and the following ejection into different legs of the reconnecting loops. For the intermediate values of By/Bz the trajectories are partially symmetric toward the midplane, leading to electrons prevailing in one leg and protons in the other.
蔡秉霖. "Influence of capping layer on magneto-optical kerr effect in magnetic sheet-film systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/06008240754030579930.
Повний текст джерела國立彰化師範大學
光電科技研究所
96
The objective of my thesis is mainly to investigate influence of capping layer on magneto-optical Kerr effect in magnetic sheet-film systems. To prevent the unwanted oxidation of the magnetic layer, we overlay the capping layer on the optically magnetic layer. With a capping layer, the magnetic character of the magnetic layer didn’t change and the capping layer increase intensity of the kerr rotation. We change three materials of capping layer. The three materials are SiNX, MgO, and Ta. With change the material of the capping layer, we also change the depth of every capping layer. Otherwise, we change the different incident angle. When the incident angle is sixty, the intensity of the kerr rotation present the best result. We first discuss the the capping later of SiNX and MgO which both are insulated material. With the depth of capping layer from 0nm to 60 nm, the capping layer increase the intensity of kerr rotation by the thin-film system. With the depth of capping layer from 60nm to 100 nm, the capping layer decrease the intensity of kerr rotation by the thin-film system by the bulk material system. Secondly, the capping layerof Ta is metal material, the capping layer decrease the intensity of kerr rotation by the thin-film system by the skin effect.
Muñoz, Sepúlveda Patricio A. "Fully kinetic PiC simulations of current sheet instabilities for the Solar corona." Doctoral thesis, 2015. http://hdl.handle.net/11858/00-1735-0000-0023-964F-4.
Повний текст джерелаHsupeng, Boryau, and 徐彭伯堯. "Formation of discontinuities and expansion waves in the outflow region of magnetic reconnection in an asymmetric current sheet." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/93992301969362824267.
Повний текст джерела國立中央大學
太空科學研究所
103
The current sheets observed in the solar wind, magnetopause, and nightside plasma sheet can be asymmetric, in which the plasma densities and/or magnetic field magnitudes on the two sides of the current sheet are not equal. A hybrid code is used to simulate the 1-D Riemann problem for the generation and evolution of MHD discontinuities and expansion waves in the outflow region of magnetic reconnection in an asymmetric current sheet. In a symmetric current sheet, four types of compound structures are found: (a) RD-SS compound structure: slow shock (SS) is attached to the downstream of rotational discontinuity (RD), (b) SS-RD: SS is followed by an adjacent RD, (c) SS-RD-SS: RD is trapped inside SS, and (d) switch-off slow shock (SSS). In the asymmetric current sheet, the rotational angle of magnetic field across an RD on the side with a higher plasma density is usually larger than that with a lower plasma density. In the asymmetric cases, only a pure RD, a single SS, or a pair of separated RD and SS may appear on one side of the current sheet. When the asymmetry is further increased, RD may become absent in the low density side. For a highly asymmetric current sheet, a slow expansion wave (SE) is formed behind the rotational discontinuity (RD) on the side with a very high plasma density, as expected from Levy et al. [1964].
Yang, Nai-Ju, and 楊乃如. "Flow and heat transfer of viscoelastic fluids saturated in porous media over a stretching sheet subject to a uniform transverse magnetic field." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/01131595551092144809.
Повний текст джерела國立暨南國際大學
土木工程學系
94
The study for flow and heat transfer in a steady laminar boundary layer flow is presented analytically for an incompressible viscoelastic fluid saturated in a porous medium subject to a transverse uniform magnetic field past a semi-infinite stretching sheet with a quadratic distribution of surface temperature and quadratic distribution of surface heat flux, respectively. Applying the boundary layer theory proposed by Prandtl in 1904, we simplify the momentum and energy equations to a set of ordinary differential equations using a similarity transform. The energy equation we considered includes the viscous dissipation, internal heat generation or absorption, work due to deformation, Joule heating and radiation. The exact solutions for temperature are given in tems of the Kummer`s functions as well as Gamma functions. The surface temperature gradient for the prescribed surface temperature (PST) and surface temperature for the prescribed heat flux (PHF) for various parameters are drawn and tabulated. The appropriate physical interpretations about thermal characteristic are proposed in this thesis, and the asymptotic solutions for temperature functions with two heating conditions when modified Prandtl number is very large are also given.
Raath, Jan Louis. "A comparative study of cosmic ray modulation models / Jan Louis Raath." Thesis, 2015. http://hdl.handle.net/10394/15516.
Повний текст джерелаMSc (Space Physics), North-West University, Potchefstroom Campus, 2015
Sonti, Rajesh. "Conformational Analysis of Designed and Natural Peptides : Studies of Aromatic/Aromatic and Aromatic/Proline Interactions by NMR." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3335.
Повний текст джерелаXing, Xiaoyan. "Criterion for interchange instability in the plasma sheet." Thesis, 2008. http://hdl.handle.net/1911/22255.
Повний текст джерелаSonti, Rajesh. "Conformational Analysis of Designed and Natural Peptides : Studies of Aromatic/Aromatic and Aromatic/Proline Interactions by NMR." Thesis, 2013. http://etd.iisc.ernet.in/2005/3335.
Повний текст джерелаKUNCLOVÁ, Kateřina. "Ověření pozičního chování u savců." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-320564.
Повний текст джерела鬼頭, 哲太郎, and Tetsutaro Kito. "iPS cell sheets created by a novel magnetite tissue engineering method for reparative angiogenesis." Thesis, 2013. http://hdl.handle.net/2237/18436.
Повний текст джерелаKumar, Rajeev. "Synthesis and development of multifunctional carbonaceous nanostructures for magnetic, optical and catalytic applications." Thesis, 2019. https://etd.iisc.ac.in/handle/2005/4951.
Повний текст джерелаO'Connell, Adam Brett. "Development of an acute excitotoxic model of Huntington's disease in sheep." Thesis, 2020. http://hdl.handle.net/2440/127292.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, Adelaide Medical School, 2020
Viana, José Pedro Cruz da Rocha. "Estudo e caracterização mecânica por via experimental de modelos de subestruturas eletromecânicas aplicadas ao fabrico de transformadores de grande potência." Master's thesis, 2015. http://hdl.handle.net/1822/40207.
Повний текст джерелаDurante o projeto de um transformador de potência é importante que se faça a prevenção da ocorrência de falhas que podem colocar o equipamento fora de serviço, e assim, gerar elevados prejuízos económicos, entre outros. De acordo com os vários registos na área das falhas dos transformadores de potência, aquela que apresenta uma maior taxa de ocorrência e que, por sinal, é a que coloca mais transformadores fora de serviço, é a falha por curto-circuito. O trabalho aqui desenvolvido relaciona-se com continuo desenvolvimento do projeto dos transformadores de potência tendo em vista a sua otimização, de forma a que o transformador mais recente resista mais e melhor do que o seu imediato antecessor. A Efacec Energia S.A. é um fabricante deste tipo de equipamentos tendo proporcionado e encorajado o estudo aqui desenvolvido. O conjunto de chapa magnética da culaça aliado às respetivas travessas são os elementos do circuito magnético dos transformadores de potência que terão de suportar os esforços de curto-circuito para garantir a integridade física do circuito magnético. O trabalho aqui desenvolvido encontra-se relacionado com a determinação dos esforços e dos deslocamentos que as chapas magnéticas da culaça e a travessa do circuito magnético têm de resistir. O conhecimento e a determinação destes valores em situação de curto-circuito permitirá influenciar o projeto estrutural dos transformadores de potência. No âmbito do trabalho desta Dissertação de Mestrado, foram executados vários ensaios experimentais a um protótipo do circuito magnético de um transformador de tipo Core. As chapas magnéticas, neste tipo de transformador, encontram-se sujeitas a uma força de aperto, que se converte em pressão, derivada do binário aplicado aos pernos da travessa. Assim, quando em situação de curtocircuito, devido ao aperto dos pernos a movimentação da culaça do circuito magnético e da travessa é limitada, mas não impossível. A travessa, para além de garantir um aperto teoricamente uniforme nas chapas magnéticas da culaça também serve para fazer o levantamento do circuito magnético durante o processo de montagem do transformador. Foram igualmente realizados testes aos binários de aperto dos pernos, por forma a validar os cálculos teóricos das forças de compressão teóricas. Os resultados obtidos permitiram ganhar conhecimentos numa área desconhecida para a Efacec, o que pode no futuro influenciar positivamente o projeto e o desenvolvimento dos novos transformadores.
During the design of a power transformer it is important to make the prevention of failures that can put the equipment out of service, and thus generate high economic losses, among others. According to several records registered in the area of the faults in power transformers, the one that has a higher occurrence rate is the failure by short-circuit and, in consequence, is the one that puts more transformers out of service. The work developed here relates to the continuous development of the design of power transformers with a view to their optimization, so that the latest transformer resist more and better than its immediate predecessor. The company Efacec Energia SA is a manufacturer of this type of equipment that has provided and encouraged the study developed here. The magnetic sheets of the yoke combined with the transformer frame are the elements of the magnetic circuit of the power transformers that will bear the short-circuit efforts to ensure the physical integrity of the magnetic circuit. The work developed here is related to determining the efforts and displacements that the magnetic sheets of the yoke and the frame of the magnetic circuit must resist. The knowledge and determination of these values in a short-circuit situation will influence the structural design of power transformers. In the work of this Thesis, were executed several experimental tests on a prototype of the magnetic circuit of a Core type transformer. In this type of power transformer, the magnetic sheets are subjected to a clamping force, which becomes pressure, derived from the torque applied to the pins of the transformer frame. Thus, when in a short-circuit situation, due to tightening of the bolts, the displacement of the magnetic circuit and of the frame is limited, but not impossible. The frame, as well as ensure a theoretically uniform tightening of magnetic sheets of the yoke, also serves to lift the magnetic circuit during the assembly process transformer They were also executed tests about the torque applied to the bolts in a way to validate the theoretical calculations of the compressive forces. The results achieved, allowed Efacec to gain knowledge in an unknown area, which can positively influence the future design and development of new transformers.