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Готові списки джерел за темами / Anomalous Hysteresis

Добірка наукової літератури з теми "Anomalous Hysteresis"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Anomalous Hysteresis"

1

Almeida, Adriano A., Daniel L. Rodrigues-Jr, Laura S. P. Perassa, Jeanete Leicht, and Fernando J. G. Landgraf. "Anomalous loss hysteresis loop." Materials Research 17, no. 2 (February 28, 2014): 494–97. http://dx.doi.org/10.1590/s1516-14392014005000020.

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2

RS, Aiswarya, Veerandra Kumar R, and Punitha P. "The Effect of Grain Size and Silicon Content on Non-Oriented Grain Steel Anomalous Loss Through Frequency Excitation in The Medical Healthcare by Using Big Data Analysis." Tamjeed Journal of Healthcare Engineering and Science Technology 1, no. 1 (April 20, 2023): 43–53. http://dx.doi.org/10.59785/tjhest.v1i1.5.

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Using steels for commercial electromagnetic purposes produced by the Jordan Steel Group, the current research will look into the effects of grain size and excitation frequency on anomalous losses and the characteristics of the hysteresis curve of the anomalous loss. The final heat treatment of 21 steel samples for commercial electromagnetic purposes, divided into three groups differing in chemical composition, was carried out in the laboratory to determine the influence of electrical resistivity, grain size, and excitation frequency on total, hysteretic, and seek a better understanding of the effect of these variables on the anomalous loss portion. Compare the experimental data to the hypothesized constitutive equations in the literature and study to create the parasitic loss plus hysteretic loss curve using interpolation, superimpose it on the total loss hysteresis curve, then correlate the areas between the curves with anomalous loss and energy dissipation processes. It is possible to determine from micrographs and grain sizes that there was an increase in grain size due to normal brain development and a minor fraction of aberrant growth at high temperatures.

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3

Meng, Ai Hua, Ming Fan Li, Han Lin He, and Hua Wei Ji. "Dynamic Coupling Hysteresis Model for Giant Magnetostrictive Materials." Advanced Materials Research 311-313 (August 2011): 2262–68. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2262.

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The giant magnetostrictive material (GMM) in dynamic magnetic field has nonlinear and hysteretic characters. Based on the nonlinear constitutive model of the material, the quasi-static hysteresis model with magneto-elastic coupling was built on the Jiles-Atherton model. Considering the eddy current and anomalous losses, the hysteresis model was modified, and the dynamic coupling hysteresis model was established on the basis. Compared with the experimental data, the areas of hysteresis curves increased with frequency, and the maximum magnetostriction strain of the curves increased with prestress. The model agreed well with the experiments within the range of 500Hz.

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4

Snaith, Henry J., Antonio Abate, James M. Ball, Giles E. Eperon, Tomas Leijtens, Nakita K. Noel, Samuel D. Stranks, Jacob Tse-Wei Wang, Konrad Wojciechowski, and Wei Zhang. "Anomalous Hysteresis in Perovskite Solar Cells." Journal of Physical Chemistry Letters 5, no. 9 (April 10, 2014): 1511–15. http://dx.doi.org/10.1021/jz500113x.

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5

O'Grady, K., and S. J. Greaves. "Anomalous effects in minor hysteresis loops." IEEE Transactions on Magnetics 31, no. 6 (1995): 2794–96. http://dx.doi.org/10.1109/20.490154.

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6

Mazauric, Vincent, Mathilde Drouineau, and Loïc Rondot. "Assessing anomalous losses with dynamic hysteresis models." International Journal of Applied Electromagnetics and Mechanics 33, no. 1-2 (October 8, 2010): 95–101. http://dx.doi.org/10.3233/jae-2010-1101.

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7

Ingle, S. G., and J. G. Dupare. "Anomalous hysteresis loops in KNbO3 single crystals." Philosophical Magazine B 67, no. 1 (January 1993): 117–30. http://dx.doi.org/10.1080/13642819308230223.

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8

Hadjipanayis, G. C., S. H. Aly, and D. J. Sellmyer. "Anomalous magnetic hysteresis in an amorphous Nd54Co36B10alloy." Journal of Applied Physics 57, no. 8 (April 15, 1985): 4133–35. http://dx.doi.org/10.1063/1.334642.

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9

van Reenen, Stephan, Martijn Kemerink, and Henry J. Snaith. "Modeling Anomalous Hysteresis in Perovskite Solar Cells." Journal of Physical Chemistry Letters 6, no. 19 (September 10, 2015): 3808–14. http://dx.doi.org/10.1021/acs.jpclett.5b01645.

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10

Wang, C. C., and L. W. Zhang. "Anomalous thermal hysteresis in dielectric permittivity of CaCu3Ti4O12." Applied Physics Letters 92, no. 13 (March 31, 2008): 132903. http://dx.doi.org/10.1063/1.2905278.

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Більше джерел

Дисертації з теми "Anomalous Hysteresis"

1

Mai, Trieu Thanh. "Anomalous heat transport and numerical studies of magnetic hysteresis /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2007. http://uclibs.org/PID/11984.

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2

Almeida, Adriano Alex de. "Influência do tamanho de grão, teor de silício e frequência de excitação nas perdas anômalas do aço GNO." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3133/tde-19092014-102156/.

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Este trabalho discute o efeito do tamanho de grão, frequência de excitação e resistividade elétrica nas perdas magnéticas, destacando-se a perda anômala. Também é proposto um método de sobreposição de histereses onde é revelada a região de ocorrência da perda anômala durante o ciclo de magnetização e desmagnetização, e posteriormente a curva de histerese da perda anômala é construída. Para tal, três ligas de aço de grão não orientado, com teor de silício de 2,05%, 2,45%, 3,3%, foram tratadas termicamente para aumento do tamanho de grão por crescimento. Cada liga foi tratada sobre a mesma sequência de temperatura, em recozimento contínuo. Os tamanhos de grão das amostras foram medidos pelo método de interceptos. A caracterização das propriedades magnéticas foi realizada por meio do quadro de Epstein. As amostras, no total de 21 conjuntos, foram ensaiadas em regime de frequência de 50, 60, 100, 150 e 200 Hz e regime quase estático (5mHz), ambos a 1 e 1,5 T. Possibilitando desta forma, a construção da histerese da perda histerética e total. Por meio dos resultados da perda total, histerética e parasita, a perda anômala pode ser calculada. Os resultados mostraram o comportamento da perda anômala (Pa) em função do tamanho de grão (l) do tipo Pa ∝ l0,34 e em frequência (f) a relação de Pa ∝ f1,65. A respeito do comportamento da perda anômala em função da resistividade elétrica (ρ), os resultados encontrados são inconclusivos. Constatou-se empiricamente que, o tamanho de grão ótimo é função da frequência e da indução. A partir de tratamento matemático, a histerese da perda parasita mais histerética, foi construída e sobreposta à histerese da perda total. Os espaços vazios entre as curvas corresponder à perda anômala. É visto que a perda anômala ocorre em três regiões distintas da curva de histerese. Tais regiões podem supostamente ser associadas à fenômenos de dissipação de energia como; movimento de parede de domínio, nucleação de domínios e aniquilação de domínio. Como as histereses da perda total, histerética e parasita possuem a mesma indução, a histerese da perda anômala pode ser construída. O campo associado à perda anômala foi obtido como resultado da soma entre campo histerético mais parasita menos o campo magnético da perda total.
This paper discusses about the effect of grain size, excitation frequency and electrical resistivity in magnetic losses, especially the anomalous loss. Also is proposed a method of overlapping hysteresis where the region of occurrence of the anomalous loss during magnetization and demagnetization cycle is disclosed, and thereafter the hysteresis curve of anomalous loss is constructed. For this purpose, three non-oriented steel alloys, with silicon content of 2.05%, 2.45%, 3.3%, were heat treated to increase the grain size by grain growth. Each alloy was treated in the same sequence of temperature in continuous annealing. The grain sizes of the samples were measured by an intercept method. Characterization of magnetic properties was performed using the Epstein frame. The samples, in total 21 sets, were tested under a frequency of 50, 60, 100, 150 and 200 Hz and quasi-static regime (5mHz), both at 1 and 1.5 T. Thus allowing the construction of the hysteresis of quasi-static and total loss. Through the results of the total loss, quasi-static loss and parasite loss, the anomalous loss can be calculated. The results show the behavior of the anomalous loss (Pa) as a function of grain size (l) as Pa ∝ l0.34 and frequency (f) the relationship of Pa ∝ f1.65. Regarding the behavior of the anomalous loss due to resistivity (ρ), the results are inconclusive. It was found empirically that the optimum grain size is a function of frequency and induction. From a mathematical treatment, the hysteresis of parasite loss plus quasi-static loss was constructed and overlapped to the hysteresis of total loss. The areas between the curves correspond to anomalous loss. It can be seen that anomalous loss occurs in three distinct regions of the hysteresis curve. Such regions may be associated with energy dissipation phenomena, such as: domain wall motion, nucleation and annihilation of domain. Since the hysteresis of total loss, quasi-static loss and parasite loss have the same induction, anomalous hysteresis loss can be constructed. The field associated with anomalous loss was obtained as a result of the sum of quasi-static field plus parasite field minus the magnetic field of the total loss.

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3

Austrin, Lars. "On magnetic amplifiers in aircraft applications." Licentiate thesis, Stockholm : Elektrotekniska system, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4439.

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4

Sharada, G. "Structure, Dynamics and Optical Properties of Organic-Inorganic Hybrid Perovskites." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4129.

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Organic-inorganic hybrid perovskites have emerged as promising photovoltaic materials in the last few years, with the possibility of easy, solution synthesis. In this thesis, we have investigated some intrinsic material properties of the hybrid lead halide perovskites in an attempt to understand factors responsible for the excellent photovoltaic behaviour. The presence of the (CH3NH3)+ or methylammonium (MA) ion with a permanent dipole moment in CH3NH3PbI3 gives rise to the possibility of ferroelectricity. In view of the continued controversy concerning the ferroelectric/non-ferroelectric nature of CH3NH3PbI3, we have addressed the more basic question of whether it is polar or not. We have measured the Second Harmonic Generation (SHG) efficiency, which is a sensitive probe to the presence of centre of inversion in the system and show that SHG efficiency of CH3NH3PbI3, if non-zero, is below the detection limit, strongly indicative of a nonpolar structure; consistent with P-E loop and single crystal XRD measurements. This nonpolar structure is a time-averaged description of the MA dipoles, consistent with many different dynamic behaviours, such as MA units rotating freely or in a correlated manner or frozen randomly. A comparison of temperature dependent dielectric constants of MAPbX3 and CsPbBr3 (without dipolar units) suggests that the MA+ dipoles are rotating freely with time scales much faster than μs. Ab initio molecular dynamics simulations show that these dipoles are randomly oriented with no net dipole moment when averaged over even a few unit cells, with a rotational time scale of ~ 7 ps at 300 K for these dipoles. Further, using pump-probe SHG efficiency measurements in MAPbX3 we have ruled out the possibility of a transient ferroelectric state in presence of photoexcitation. Further, we have carried out detailed investigation of dielectric properties of a larger class of hybrid lead halide perovskites, specifically the formamidinium lead halides (FAPbX3). Although the behaviour of dielectric constants of FAPbCl3 and FAPbBr3 in the low temperature resemble that of the MAPbX3 system, the absence of its strong temperature dependence in contrast to MAPbX3 lead us to conclude that the formamidinium (FA) dipoles are frozen in a glassy state. This is supported by the temperature dependent single crystal XRD results, which reveal disordered FA ions in the room temperature as well as at 100 K. Exciton binding energy is an important parameter in a photovoltaic material since it determines whether the mechanism is dominated by free charge carriers or excitons at room temperature. The exciton binding energy reported for MAPbI3 in the literature varies over a wide range of values. From careful experiments to measure temperature dependent PL spectra of MAPbI3 and MAPbBr3 we have estimated the exciton binding energy. PL intensity of MAPbBr3 films is observed to be sensitive to vacuum, environmental conditions and illumination. Since the penetration depth of the excitation wavelength, 405 nm, is very small in the sample, most part of the PL intensity observed can be considered to be from the near-surface region of the sample. We propose that defects are created at the surface of MAPbBr3 by the evaporative loss of MABr due to dynamic pumping. Considering all these factors, we have obtained the binding energy of MAPbBr3 film to be 79 meV, which corresponds to the intrinsic nature of the surface of MAPbBr3 film in vacuum.

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Частини книг з теми "Anomalous Hysteresis"

1

Müller, K. H., M. Wolf, A. Handstein, D. Eckert, C. Andrikidis, and S. Collocott. "Anomalous Magnetic Aftereffect." In Magnetic Hysteresis in Novel Magnetic Materials, 243–52. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5478-9_24.

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2

Berkowitz, A. E., R. H. Kodama, S. A. Makhlouf, F. T. Parker, F. E. Spada, E. J. McNiff, and S. Foner. "Anomalous Hysteresis Properties in Ferrimagnetic and Antiferromagnetic Nanoparticles." In Magnetic Hysteresis in Novel Magnetic Materials, 293–307. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5478-9_28.

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3

Schmidt, C. "Anomalous Low Hysteresis Losses in NbTi Superconductors with Very Fine Filaments." In Advances in Cryogenic Engineering Materials, 207–14. Boston, MA: Springer US, 1990. http://dx.doi.org/10.1007/978-1-4613-9880-6_27.

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4

Sappey, R., E. Vincent, J. Hammann, F. Chaput, J. P. Boilot, and D. Zins. "Anomalies in the Relaxation of Small Magnetic Particles at Very Low Temperatures." In Magnetic Hysteresis in Novel Magnetic Materials, 375–82. Dordrecht: Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5478-9_39.

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5

Sugahara, M., H. F. Lu, H. Q. Yin, Y. Kumagai, M. Miyata, H. Kaneda, N. Haneji, and N. Yoshikawa. "Anomalous Hysteretic Dielectric Polarization in C-Axis-Oriented La2-xSrxCuO4 Film." In Advances in Superconductivity X, 115–18. Tokyo: Springer Japan, 1998. http://dx.doi.org/10.1007/978-4-431-66879-4_25.

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6

Scalerandi, Marco, Matteo Nobili, Michele Griffa, Antonio S. Gliozzi, and Federico Bosia. "Numerical Analysis of the Anomalous Elastic Behavior of Hysteretic Media: Quasistatic, Dynamic, and Relaxation Experiments." In Universality of Nonclassical Nonlinearity, 269–85. New York, NY: Springer New York, 2006. http://dx.doi.org/10.1007/978-0-387-35851-2_17.

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7

Kyriakou, Georgia, and Charis R. Theocharis. "The Anomalous Sorptive Behaviour Of Zsm-5 And Silicalite-I: Observation Of Low-Pressure Hysteresis In Nitrogen Adsorption." In Characterization of Porous Solids VI, Proceedings of the 6th International Symposium on the Characterization of Porous Solids (COPS-VI), 709–16. Elsevier, 2002. http://dx.doi.org/10.1016/s0167-2991(02)80200-2.

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8

Beschmann, K., G. T. Kokotailo, and L. Riekert. "Sorption and Diffusion of Benzene and Xylenes in Zeolite ZSM-5: Diffusion Anomalies and Hysteresis Effects." In Characterization of Porous Solids, Proceedings of the IUPAC Symposium (COPS I), Bad Soden a. Ts., 355–65. Elsevier, 1988. http://dx.doi.org/10.1016/s0167-2991(09)60759-x.

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Тези доповідей конференцій з теми "Anomalous Hysteresis"

1

Gao, Yanhui, Taketo Shibauchi, Yuji Gotoh, Weimin Guan, and Kazuhiro Muramatsu. "Dynamic Hysteresis Calculation of Silicon Steel Considering DC Hysteresis and Anomalous Eddy Current Loss." In 2022 IEEE 20th Biennial Conference on Electromagnetic Field Computation (CEFC). IEEE, 2022. http://dx.doi.org/10.1109/cefc55061.2022.9940876.

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2

Gage, E. C., F. C. Cheng, and L. Mandel. "Anomalous bistable behavior of a dye laser." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.thcc1.

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An anomalous form of bistability and hysteresis has been observed in a dye laser at low excitation, when for a given pump power the dye laser may be either on or off. The dye laser exhibits a memory. It is found that if the pump beam is briefly interrupted the dye laser returns to the original on or off branch of the hysteresis cycle, but if the dye laser beam is interrupted, the laser always remains off. Ancillary experiments suggest that a multilayer mirror is responsible.

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3

Lu, Qifeng, Yanfei Qi, Ce Zhou Zhao, Chun Zhao, Stephen Taylor, and Paul R. Chalker. "Anomalous capacitance-voltage hysteresis in MOS devices with ZrO2 and HfO2 dielectrics." In 2016 5th International Symposium on Next-Generation Electronics (ISNE). IEEE, 2016. http://dx.doi.org/10.1109/isne.2016.7543290.

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4

Al-Bender, F., and W. Symens. "Identification and Control of Hysteresis in Rolling Element Guideways." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85246.

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Rate independent hysteresis seems to be the dominant frictional characteristic found in many machine elements in common engineering use, such as plain and rolling element guideways. The study of the non-linear dynamics caused by such elements becomes imperative if we wish to achieve improved design and, in particular, effective control of such machines. This paper reviews systematic analysis, which we have carried out to characterize the dynamics of rolling element guideways. The dependency of hysteresis characteristics on the bearing design parameters is first investigated and the notion of ‘equivalent’ dynamic quantities, namely stiffness and damping, is introduced. Secondly, a frequency domain, harmonic analysis method for mass-“hysteresis spring” systems, via application of the Describing Function method, is developed and discussed. We checked the validity and applicability of this approach by direct numerical simulation as well as by experiment. The results showed that the (amplitude dependent) Frequency Response Maps invariably contain an “anomalous” region where the response is very sensitive to systems parameter variations. This manifests itself in practice in jump-like phenomena, which thus appear to be inherent features of this type of system. Finally, appropriate control structures for systems with this type of hysteresis elements are proposed and discussed.

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5

Mahrouqi, Bashara, Ahmed AL Salehi, AL Khansa Aadi, Pierre Olivier, Liali Qasmi, Sakharin Suwannathatsa, and Khalfan Mahrazy. "Rock Types Modelling Impact on Field Development and Volumes; A Case Study from Lower Shuaiba Carbonate Reservoir in Field WU." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211650-ms.

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Abstract Objective/Scope Facies distribution in the static model of carbonate reservoirs provides a framework for the distribution the other petrophysical properties. Lower Shuaiba (LSH) reservoir model in Field WU is aiming to provide improved facies distribution to improve STOIIP calculation and well placement/count. Lower Shuaiba reservoir is characterised by 5 lithostratigraphic cycles with different facies and rock types. These facies are consistent in the lower zones, however they are more variable in the top layers 1A (in the oil window). This layer is dominated by skeletal packstones, skeletal wackestones and thin beds of Rudist floatstones/rudstones as characterised from core data. These facies are comparable in their log responses and therefore cannot be differentiated with logs alone. However, they have different properties (Por, Perm) which have a great impact on STOIIP and well placement. Moreover, the Rudist-rich rock type is interpreted as an imbibed layer which adds more complexity to the reservoir model. Methods, Procedures, Process Two model scenarios were built based on the different facies distribution methods: (1) core-based method, which is limited for few wells and assuming lateral continuity of rock types between the wells; (2) capillary-based method, which uses the Saturation height function to predict the facies. This method uses the idea that facies differ in their capillary entry-height and thus will have different saturation responses. Whenever possible, these were then compared with core data. Results, Observations, Conclusions This new capillary-based model improved the volume estimation compared with the layer-cake model because of the improved mapping of the imbibed Rudist facie. The model allows ranking the proposed wells based on their facies distribution to maximise well production and reduce early water breakthrough. It also explains the anomalies in saturation/production (caused by facies distribution) in some of the existing wells. The study found that the anomalous high peak resistivity is associated with the imbibed Rudist layer (confirmed by log and production test) and should be avoided while drilling the horizontal section. It also highlighted the important of continuous appraisal in the area to add control points for the facies model. Novel or Additive Information The paleo Free Water Level (FWL) for Lower Shuaiba formation was determined based on the best fit between a core-based (drainage) saturation-height models and Archie log saturation. The FWL could not be identified on pressure plot due to the large scatter of pressure points which is typical for this low permeability /low mobility reservoir. Other factors such as wettability heterogeneities, fluid fill history and hysteresis makes it difficult to define the oil gradient and hence FWL. This FWL and saturation height function (SHF) were then used to predict the rock types, based on best match iterations between saturation log and saturation calculated by SHF.

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6

Chang, Hsueh-Chia. "Electrokinetics of Nanochannels: The Next Nanotechnology for Ion/Molecule/Nanocolloid Sensing, Concentration and Filtration." In ASME 2009 7th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2009. http://dx.doi.org/10.1115/icnmm2009-82128.

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Because nanochannels act as lenses that can focus electric fields on a chip, they can concentrate and filter ions, molecules and nanocolloids by ion selectivity, electrodeless dielectrophoresis and surface hybridization. However, before fabricated nanochannels can lead to the next-generation of chip-scale dialysis membranes, preconcentrators for mass spectrometers, ion sieves, molecular sensors, solar/fuel cell membranes etc, the anomalous dc I-V characteristics and ac impedance of such nanochannels must be understood. Curious phenomena such as limiting and over-limiting currents, rectification, hysteretic cyclic voltametry, Warburg impedance, channel cross-talk etc will be studied with fabricated nanochannels, confocal microscopy and fluorescence correlation spectroscopy and analyzed mathematically with fundamental Nernst-Planck ion transport theories, Guoy-Chapman equilibrium electrolyte theories and new non-equilibrium extended polarization theories.

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