Готові списки джерел за темами / Phase tensor

Добірка наукової літератури з теми "Phase tensor"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Phase tensor"

1

Milton, Graeme W., and Andrej V. Cherkaev. "Which Elasticity Tensors are Realizable?" Journal of Engineering Materials and Technology 117, no. 4 (October 1, 1995): 483–93. http://dx.doi.org/10.1115/1.2804743.

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It is shown that any given positive definite fourth order tensor satisfying the usual symmetries of elasticity tensors can be realized as the effective elasticity tensor of a two-phase composite comprised of a sufficiently compliant isotropic phase and a sufficiently rigid isotropic phase configured in an suitable microstructure. The building blocks for constructing this composite are what we call extremal materials. These are composites of the two phases which are extremely stiff to a set of arbitrary given stresses and, at the same time, are extremely compliant to any orthogonal stress. An appropriately chosen subset of the extremal materials are layered together to form the composite with elasticity tensor matching the given tensor.
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2

Neukirch, Maik, Daniel Rudolf, Xavier Garcia, and Savitri Galiana. "Amplitude-phase decomposition of the magnetotelluric impedance tensor." GEOPHYSICS 84, no. 5 (September 1, 2019): E301—E310. http://dx.doi.org/10.1190/geo2018-0352.1.

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The introduction of the phase tensor marked a breakthrough in the understanding and analysis of electric galvanic distortion effects. It has been used for (distortion-free) dimensionality analysis, distortion analysis, mapping, and subsurface model inversion. However, the phase tensor can only represent half of the information contained in a complete impedance data set. Nevertheless, to avoid uncertainty due to galvanic distortion effects, practitioners often choose to discard half of the measured data and concentrate interpretation efforts on the phase tensor part. Our work assesses the information loss due to pure phase tensor interpretation of a complete impedance data set. To achieve this, a new MT impedance tensor decomposition into the known phase tensor and a newly defined amplitude tensor is motivated and established. In addition, the existence and uniqueness of the amplitude tensor is proven. Synthetic data are used to illustrate the amplitude tensor information content compared with the phase tensor. Although the phase tensor only describes the inductive effects within the subsurface, the amplitude tensor holds information about inductive and galvanic effects that can help to identify conductivity or thickness of (conductive) anomalies more accurately than the phase tensor. Furthermore, the amplitude and phase tensors sense anomalies at different periods, and thus the combination of both provides a means to evaluate and differentiate anomaly top depths in the event of data unavailability at extended period ranges, e.g., due to severe noise.
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3

Basak, Anup, and Valery I. Levitas. "An exact formulation for exponential-logarithmic transformation stretches in a multiphase phase field approach to martensitic transformations." Mathematics and Mechanics of Solids 25, no. 6 (February 14, 2020): 1219–46. http://dx.doi.org/10.1177/1081286520905352.

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A general theoretical and computational procedure for dealing with an exponential-logarithmic kinematic model for transformation stretch tensor in a multiphase phase field approach to stress- and temperature-induced martensitic transformations with N martensitic variants is developed for transformations between all possible crystal lattices. This kinematic model, where the natural logarithm of transformation stretch tensor is a linear combination of natural logarithm of the Bain tensors, yields isochoric variant–variant transformations for the entire transformation path. Such a condition is plausible and cannot be satisfied by the widely used kinematic model where the transformation stretch tensor is linear in Bain tensors. Earlier general multiphase phase field studies can handle commutative Bain tensors only. In the present treatment, the exact expressions for the first and second derivatives of the transformation stretch tensor with respect to the order parameters are obtained. Using these relations, the transformation work for austenite ↔ martensite and variant ↔ variant transformations is analyzed and the thermodynamic instability criteria for all homogeneous phases are expressed explicitly. The finite element procedure with an emphasis on the derivation of the tangent matrix for the phase field equations, which involves second derivatives of the transformation deformation gradients with respect to the order parameters, is developed. Change in anisotropic elastic properties during austenite–martensitic variants and variant–variant transformations is taken into account. The numerical results exhibiting twinned microstructures for cubic to orthorhombic and cubic to monoclinic-I transformations are presented.
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4

Neukirch, Maik, Savitri Galiana, and Xavier Garcia. "Appraisal of magnetotelluric galvanic electric distortion by optimizing amplitude and phase tensor relations." GEOPHYSICS 85, no. 3 (April 29, 2020): E79—E98. http://dx.doi.org/10.1190/geo2019-0359.1.

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The introduction of the phase tensor marked a major breakthrough in the analysis and treatment of electric field galvanic distortion in the magnetotellurics method. Recently, the phase tensor formulation has been extended to a complete impedance tensor decomposition by introducing the complementary amplitude tensor, and both tensors can be further parameterized to represent geometric properties such as dimensionality, strike angle, and macroscopic anisotropy. Both tensors are characteristic for the electromagnetic induction phenomenon in the conductive subsurface with its specific geometric structure. The central hypothesis is that this coupling should result in similarities in both tensor’s geometric parameters, skew, strike, and anisotropy. A synthetic example illustrates that the undistorted amplitude tensor parameters are more similar to the phase tensor than increasingly distorted ones and provides empiric evidence for the predictability of the proposed hypothesis. Conclusions drawn are reverse engineered to produce an objective function that minimizes when amplitude and phase tensor parameter dissimilarity is, along with any present distortion, minimal. A genetic algorithm with such an objective function is used to systematically seek the distortion parameters necessary to correct any affected amplitude tensor and, thus, impedance data. The successful correction of a large synthetic impedance data set with random distortion further supports the central hypothesis and serves as comparison to the state-of-the-art. The classic BC87 data set sites lit007/ lit008 and lit901/ lit902 have been noted by various authors to contain significant distortion and a 3D regional response, thus invalidating current distortion analysis methods and eluding geologic interpretation. Correction of the BC87 responses based on the present hypothesis conforms to the regional geology.
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5

Abdelwahed, Mohamed, Luigi C. Berselli, and Nejmeddine Chorfi. "On the uniqueness for weak solutions of steady double-phase fluids." Advances in Nonlinear Analysis 11, no. 1 (September 8, 2021): 454–68. http://dx.doi.org/10.1515/anona-2020-0196.

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Abstract We consider a double-phase non-Newtonian fluid, described by a stress tensor which is the sum of a p-Stokes and a q-Stokes stress tensor, with 1 < p<2 < q<∞. For a wide range of parameters (p, q), we prove the uniqueness of small solutions. We use the p < 2 features to obtain quadratic-type estimates for the stress-tensor, while we use the improved regularity coming from the term with q > 2 to justify calculations for weak solutions. Results are obtained through a careful use of the symmetries of the convective term and are also valid for rather general (even anisotropic) stress-tensors.
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6

Caldwell, T. Grant, Hugh M. Bibby, and Colin Brown. "The magnetotelluric phase tensor." Geophysical Journal International 158, no. 2 (August 2004): 457–69. http://dx.doi.org/10.1111/j.1365-246x.2004.02281.x.

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7

Farutin, A. M. "On tensor phase transitions." Journal of Experimental and Theoretical Physics 108, no. 3 (March 2009): 469–76. http://dx.doi.org/10.1134/s1063776109030108.

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8

Dolinšek, J., and R. Blinc. "A Note on the 14N Electric Field Gradient Notizen: Tensors in Incommensurate [N(CH3)4]2ZnCl4." Zeitschrift für Naturforschung A 42, no. 3 (March 1, 1987): 305–6. http://dx.doi.org/10.1515/zna-1987-0318.

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The 14N electric field gradient tensors of [N(CH3)4]2ZnCl4 have been re-determined in the paraelectric phase at 26 °C and in the incommensurate phase at 16 °C. The results in the incommensurate phase show the “non-local” nature of the 14N EFG tensor interaction.
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9

Macholl, Sven, Frank Börner, and Gerd Buntkowsky. "Revealing CSA Tensors and Hydrogen Bonding in Methoxycarbonyl Urea: A combined 13C, 15N and 13C14N2 Dipolar Chemical Shift NMR and DFT Study." Zeitschrift für Physikalische Chemie 217, no. 12 (December 1, 2003): 1473–506. http://dx.doi.org/10.1524/zpch.217.12.1473.20470.

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AbstractMethoxycarbonyl urea (MCU), a potential long-term nitrogen fertilizer, is studied by 13C and 15N dipolar chemical shift NMR spectroscopy and ab initio calculations. Employing a combination of dipolar chemical shift NMR, selective isotope labeling and ab initio gas phase calculations, possible molecular structures and chemical shielding tensors of all 15N nuclei and of two out of the three 13C nuclei were revealed. Four possible stable configurations of the molecule with different energies were found in the calculations. The CSA tensors were calculated for these configurations. While the calculated 13C(urea) CSA tensor orientation of the configuration with the lowest energy is in good agreement with the experimental tensor orientation, there are pronounced differences between calculated and experimental tensor eigenvalues. These differences are a clear indication of the presence of intermolecular hydrogen bonds in the experimental sample, which are neglected in the gas phase calculations. Four different possible orientations of the experimental 13C(urea) CSA tensor exist, due to symmetry. This ambiguity is solved by comparison with results from GIAO calculations of the 13C CSA tensor, employing the minimum energy configuration (EEZ). It is found that the orientation, where δ11 points approximately in direction of N(imide), δ22 approximately in direction of the C=O bond, and δ33 is oriented perpendicular to the molecular frame, is adopted in the molecule.
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10

Kopský, Vojtěch. "Tensor parameters of ferroic phase transitions." Phase Transitions 73, no. 1-2 (January 2001): 1–422. http://dx.doi.org/10.1080/01411590108226583.

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Більше джерел

Дисертації з теми "Phase tensor"

1

Kindberg, Katarina. "Regional Kinematics of the Heart: Investigation with Marker Tracking and with Phase Contrast Magnetic Resonance Imaging." Thesis, Linköping University, Department of Biomedical Engineering, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1735.

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The pumping performance of the heart is affected by the mechanical properties of the muscle fibre part of the cardiac wall, the myocardium. The myocardium has a complex structure, where muscle fibres have different orientations at different locations, and during the cardiac cycle, the myocardium undergoes large elastic deformations. Hence, myocardial strain pattern is complex. In this thesis work, a computation method for myocardial strain and a detailed map of myocardial transmural strain during the cardiac cycle are found by the use of surgically implanted metallic markers and beads. The strain is characterized in a local cardiac coordinate system. Thereafter, non-invasive phase contrast magnetic resonance imaging (PC-MRI) is used to compare strain at different myocardial regions. The difference in resolution between marker data and PC-MRI data is elucidated and some of the problems associated with the low resolution of PC-MRI are given.

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2

Okazaki, Tomohisa. "Characteristics of Electrical Anisotropy in Magnetotelluric Responses." Kyoto University, 2018. http://hdl.handle.net/2433/232256.

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3

Heeren, Janna Eva Kathrina [Verfasser]. "Diffusion Tensor Imaging und neuropsychologische Testungen zur Diagnostik des idiopathischen Parkinson-Syndroms während der prämotorischen Phase / Janna Eva Kathrina Heeren." Lübeck : Zentrale Hochschulbibliothek Lübeck, 2019. http://d-nb.info/1179305183/34.

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4

Liu, Meishuai. "Study on microstructural and crystallogarphic characteristics of phase transformation induced by ECP in annealed Cu-40%Zn alloy." Electronic Thesis or Diss., Université de Lorraine, 2019. http://www.theses.fr/2019LORR0210.

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Ce travail porte sur les caractéristiques microstructurales et cristallographiques des alliages Cu-40%Zn traités par Electric Current Pulse (ECP). La relation d'orientation (RO) de transformation de phase et sa corrélation avec les défauts cristallins ont été étudiés. Les mécanismes de formation des défauts cristallins dans la phase mère et des sous-structures dans les précipités β induit par L'ECP ont également été étudiés. La transformation de la phase α en β peut être induite par un traitement ECP avec formation de précipités fins β pouvant persister à température ambiante. Avec l'augmentation de la densité de courant électrique, la quantité de précipités et les sites de formation augmentent des joints de grains α à l'intérieur des grains. Les précipités β suivent différentes RO en fonction du site de formation. Les joints de grains β sont en RO Kurdjumov-Sachs (KS); tandis que les β intragranulaires sont en Nishiyama-Wasserman (NW). Dans les premiers sites, on observe des dislocations {111}α/<11̅0>α, alors que dans les seconds, les fautes d’empilements {111}α/<112̅>α sont présentes. Les analyses de déformation de transformation ont révélé que, en RO KS, la déformation maximale du réseau requise est un cisaillement sur le système {111}α/<112̅>α, tandis qu'en NW, la déformation maximale correspond à un cisaillement sur le système {111}α/<112̅>α. Ainsi, les dislocations {111}α/<11̅0>α existants le long des joints de grains α fournissent la précontrainte requise par la transformation KS, alors que les fautes d'empilement {111}α/<112̅>α entourées par les dislocations partielles {111}α/<112̅>α offrent une précontrainte facilitant la transformation NW. Différents types de défauts cristallins sont formés dans la matrice α par les traitements ECP en fonction de la densité de courant. À faible densité, une grande quantité de fautes d'empilement {111}α/<112̅>α, puis des nano-mâcles sont produites dans la matrice α. A haute densité, des réseaux de dislocations sont formés à proximité des précipités β composés de dislocations coins parfaites {111}α/<11̅0>α et des dislocations de Frank. La différence de volume entre le phases α et β analysée avec la déformation de transformation révèle que cette dernière nécessite une dilatation dans la direction [11̅0]α et une contraction dans la direction [111]α. La première entraîne l’apparition de dislocations coins {111}α/<11̅0>α devant les larges faces {31̅1}α et la dernière induit la formation des dislocations de Frank devant les larges faces {121}α. Ainsi, des réseaux de dislocations se forment le long des bords des grandes faces des précipités β où les deux types de dislocations se rencontrent. De plus, les précipités β contiennent deux types d’agrégats atomiques de taille nanométrique de structure n en RO Burgers et de structure ω en RO Blackburn avec la matrice β. Ils ont été formés par un déplacement atomique en deux étapes. Pour la structure n, la première étape est le brassage atomique de chaque second plan {110}β dans la direction <11̅0>β et la seconde consiste en un changement de structure principalement par un cisaillement selon {11̅2}β /<1̅11>β. Pour la structure ω, le premier est un mélange atomique sur chaque deuxième et troisième plan {112̅}β dans les directions ±[111]β, puis des déformations normales dans trois directions perpendiculaires (<111>β, <112̅>β et <11̅0>β). L’apparence concomitante des deux structures réside dans le fait que l’augmentation de volume accompagnant la formation de n peut être annulée par la diminution de volume accompagnant la distorsion ω, ce qui minimise l’énergie de déformation de transformation. Ce travail fournit des informations fondamentales sur les alliages Cu-40%Zn pour interpréter l’impact des défauts sur les relations d'orientation de transformations en phase solide, sur la formation de divers types de défauts induits par la transformation de phase ultra-rapide ainsi que sur les mécanismes de formation des sous-structures des phases produites
A thorough investigation has been conducted on the microstructural and crystallographic features of Electric Current Pulse (ECP) treated Cu-40%Zn alloys. The phase transformation orientation relationship (OR) and its correlation with crystal defects have been studied and the formation mechanisms of ECP induced crystal defects in the parent phase and the sub-structures in the β precipitates were also analyzed. The α to β heating phase transformation can be induced by ECP treatment with the formation of fine β precipitates that can be remained to the room temperature. With the increase of the electric current density, the amount of precipitates is increased and the formation sites increase from α grain boundaries to grain interiors. The β precipitates follow different ORs depending on the formation site. The grain boundary β phase obeys the Kurdjumov-Sachs (K-S) OR; whereas the intragranular β respects the Nishiyama-Wasserman (N-W) OR. In the former sites, the {111}α /<11̅0>α dislocations are observed, whereas in the latter, the {111}α/<112̅>α stacking faults are found. Transformation strain analyses revealed that under the K-S OR the maximum lattice deformation required is a shear on the {111}α /<11̅0>α slip system, whereas under the N-W OR the maximum deformation is a shear on the {111}α /<112̅>α system. Thus the existing {111}α /<11̅0>α dislocations along the α grain boundaries provide pre-strain required by the transformation via the K-S path, whereas the {111}α /<112̅>α stacking faultsboarded by {111}α /<112̅>α partial dislocations offer pre-strain facilitating the transformation via the N-W path. Different types of crystal defects are formed in the α matrix by the ECP treatments depending on the current density. At low density, large amount of {111}α /<112̅>α stacking faults and then nano twins are produced in the α matrix. At high density, dislocation nets are formed near the β precipitates that are composed of edge typed {111}α /< 11̅0 >α perfect dislocations and the Frank typed dislocations. The volume misfit between the α and the β phase analyzed with transformation deformation reveals that the transformation from α to β requires an expansion along [11̅0]α direction and a contraction along [111]α direction. The former results in the appearance of the {111}α /<11̅0>α edge typed dislocation arrays in front of the {31̅1}α broad faces and the latter induces the formation of the Frank typed dislocations in front of the {121}α broad faces. Thus, dislocation nets formed along the edges of the broad faces of the β precipitates where the two kinds of dislocations meet. Furthermore, the β precipitates contain two kinds of nano-sized and diffuse atomic clusters with the  structure obeying the Burgers OR and with the ω structure obeying the Blackburn OR with the β matrix. They were each formed through a two-stepped atomic displacement. For the  structure, the first step is the atomic shuffle of each second {110}β plane in the <11̅0>βdirection and the second is a structure change mainly by a shear on the {11̅2}β /<1̅11>β. For the ω structure, the first is an atomic shuffle on each second and third {112̅}β plane in the ±[111]β directions and then normal strains in three mutually perpendicular directions (<111>β, <112̅>β and <11̅0>β). The concomitant appearance of the two structures lies in the fact that the volume increase accompanying the  formation can be canceled by the volume decrease accompanying the ω distortion, which minimizing the transformation strain energy. The results of this work provide fundamental information on the Cu-40%Zn alloys for interpreting the impact of the crystal defects on the solid phase transformation ORs, on the formation of various types of crystal defects induced by the ultra-rapid phase transformation and on the formation mechanisms of sub structures in the product phase
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5

McKee, Justin. "A phase II randomised controlled trial of amiloride as a neuroprotective treatment in optic neuritis : studying in vivo neurodegeneration, neuroprotection and cortical plasticity after an inflammatory insult to the visual system." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:824ca36c-68ed-4b0c-90dc-925941ce9450.

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Basic science and early clinical trial evidence suggest the safe diuretic drug amiloride, may exert a neuroprotective effect in multiple sclerosis (MS) through blockade of the acid sensing ion channel. Neuroprotective treatments are a key unmet need in multiple sclerosis. Optic neuritis (ON) is a discrete CNS inflammatory event leading to neuro-axonal injury in the optic nerve and retina. The optic nerve is part of the visual system, one of the most functionally and structurally eloquent systems in the central nervous system, which affords a number of unique modalities to assess neurodegeneration and neuroprotection. The visual system can be classified into two parts, the anterior and posterior visual systems, which are defined by the lateral geniculate nucleus, where the two components synapse. The extent of neurodegeneration following ON in the anterior visual system can be imaged in vivo through scanning laser polarimetry (GDx) and optical coherence tomography (OCT). The posterior visual system can be imaged by quantitative and functional magnetic resonance imaging (MRI) of the brain, giving insights into white matter structural integrity and cortical plasticity over time. Combining these modalities in a longitudinal study, allows assessment of the impact of neurodegeneration in the anterior visual system on neurodegeneration downstream in the posterior visual system and on changes in functional connectivity over time in the visual cortex. Furthermore, in the clinical trial setting the neuroprotective effect of any intervention both on direct anterior neurodegeneration and downstream processes can be assessed. The functional relevance of changes in all of these biomarkers can be tested through a number of visual measures, including low contrast visual acuity. In MS, the contribution of transsynaptic neurodegeneration to the global neuronal loss experienced by patients is an area of incomplete understanding. In addition, the role of the visual cortex, through neuroplasticity, in aiding visual recovery from optic neuritis, is unclear. To address these issues, this thesis reports the results of the first clinical trial of amiloride in ON, and shows that despite the pre- and early clinical evidence of neuroprotection of amiloride, no neuroprotective benefit was found. It goes on to explore reasons for this lack of effect including the finding of early retinal neurodegeneration in ON, and the need for early recruitment windows in the future. From there, it makes a detailed assessment of the longitudinal changes in retinal OCT for 12 months following ON, including a novel finding of the temporal evolution of inner nuclear layer swelling, previously reported only cross-sectionally. Next, for the first time macular retinal neurodegeneration is shown to influence diffusion tensor MRI derived measures of white matter integrity in the optic radiations, indicating transsynaptic neurodegeneration. Finally, longitudinal changes in resting state functional connectivity following ON are found in the visual system for the first time. The interaction between this cortical functional, retinal neurodegeneration and visual recovery is probed.
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6

Jiang, Shenghan. "Symmetric topological phases and tensor network states:." Thesis, Boston College, 2017. http://hdl.handle.net/2345/bc-ir:107410.

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Thesis advisor: Ying Ran
Classification and simulation of quantum phases are one of main themes in condensed matter physics. Quantum phases can be distinguished by their symmetrical and topological properties. The interplay between symmetry and topology in condensed matter physics often leads to exotic quantum phases and rich phase diagrams. Famous examples include quantum Hall phases, spin liquids and topological insulators. In this thesis, I present our works toward a more systematically understanding of symmetric topological quantum phases in bosonic systems. In the absence of global symmetries, gapped quantum phases are characterized by topological orders. Topological orders in 2+1D are well studied, while a systematically understanding of topological orders in 3+1D is still lacking. By studying a family of exact solvable models, we find at least some topological orders in 3+1D can be distinguished by braiding phases of loop excitations. In the presence of both global symmetries and topological orders, the interplay between them leads to new phases termed as symmetry enriched topological (SET) phases. We develop a framework to classify a large class of SET phases using tensor networks. For each tensor class, we can write down generic variational wavefunctions. We apply our method to study gapped spin liquids on the kagome lattice, which can be viewed as SET phases of on-site symmetries as well as lattice symmetries. In the absence of topological order, symmetry could protect different topological phases, which are often referred to as symmetry protected topological (SPT) phases. We present systematic constructions of tensor network wavefunctions for bosonic symmetry protected topological (SPT) phases respecting both onsite and spatial symmetries
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7

Mickel, Walter. "Geometry controlled phase behavior in nanowetting and jamming." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00868861.

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This thesis is devoted to several aspects of geometry and morphology in wetting problems and hard sphere packings. First, we propose a new method to simulate wetting and slip on nanostructured substrates: a phase field model associated with a dynamical density theory approach. We showed omniphobicity, meaning repellency, no matter the chemical properties of the liquid on monovalued surfaces, i.e. surfaces without overhangs, which is in contradiction with the macroscopic Cassie-Baxter-Wenzel theory, can produce so-called We checked systematically the impact of the surface parameters on omniphobic repellency, and we show that the key ingredient are line tensions, which emerge from needle shaped surface structures. Geometrical effects have also an important influence on glassy or jammed systems, for example amorphous hard sphere systems in infinite pressure limit. Such hard sphere packings got stuck in a so-called jammed phase, and we shall demonstrate that the local structure in such systems is universal, i.e. independent of the protocol of the generation. For this, robust order parameters - so-called Minkowski tensors - are developed, which overcome robustness deficiencies of widely used order parameters. This leads to a unifying picture of local order parameters, based on geometrical principles. Furthermore, we find with the Minkowski tensor analysis crystallization in jammed sphere packs at the random closed packing point
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8

Dandekar, Abhijit Yeshwant. "Interfacial tension and viscosity of reservoir fluids." Thesis, Heriot-Watt University, 1994. http://hdl.handle.net/10399/1397.

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9

Santos, Fernando Luiz Pio dos. "Simulação numérica de escoamentos multifásicos utilizando o sistema FreeFlow-2D." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-11122001-173103/.

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Este trabalho descreve um método para expandir a aplicabilidade do sistema FreeFlow-2D para problemas de escoamentos de fluidos multifásicos. Este método permite a simulação de escoamento de fluido multifásico, incompressível e com superfície livre. Um número arbitrário de fases com propriedades diferentes pode ser utilizado. Tensões superficial e interfacial são também consideradas. A técnica numérica utilizada baseia-se no GENSMAC (Generalized-Simplified-Marker-and-Cell) e consideram-se propriedades variáveis de acordo com a posição da interface durante o escoamento. O campo de velocidade é computado utilizando-se às equações de Navier-Stokes discretizadas por esquema de diferença finita numa malha deslocada. O método foi implementado em três módulos: Modelador, Simulador e Visualizador. A validação foi efetuada comparando-se os resultados numéricos com resultados analíticos e experimentais. O método mostrou-se robusto e computacionalmente eficiente para os problemas considerados.
This work describes a method to expand the applicability of the system FreeFlow-2D in multi-phase flows problems. This method allows the simulation of incompressible free surface multi-phase flows. An arbitrary number of phases having different properties can be used. Surface and interface tension effects are also considered. The numerical technique is based on the GENSMAC (Generalized-Simplified-Marker-and-Cell) and it considers the properties varying according to the position of the interfaces in the flow. The velocity field is computed using the Navier-Stokes equations discretized by finite-difference on stagered grid. The method was implemented in three modules: the modeling module, the simulation module, and the visualization module. The validation was effected by comparing numerical results with analytical and experimental results. The method shown to be robust and computationally efficient in the problems considered.
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Braun, Frank Nicholas. "Surface phase transitions in liquid crystals." Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242564.

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Книги з теми "Phase tensor"

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1949-, Reed Susan, and Cappelle Bert 1975-, eds. The grammar of the English verb phrase. Berlin: Mouton de Gruyter, 2006.

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2

Han'gugŏ esŏ sang ŭi tu yangsang e taehan koch'al. Sŏul-si: Han'guk Munhwasa, 2007.

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Khomitsevich, Olga. Dependencies across phases: From sequence of tense to restrictions on movement = Afhandelijkheden over fasen heen : van opeenvolging van tijden tot beperkingen op verplaatsing. Utrecht: LOT, 2007.

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4

Individuals in time: Tense, aspect, and the individual/stage distinction. Amsterdam: John Benjamins, 2004.

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5

Arche, María J. Individuals in time: Tense, aspect and the individual/stage distinction. Amsterdam: J. Benjamins, 2006.

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6

English verb tenses at a glance: A color-coded verb guide for ESL students (and teachers!). Austin, Texas]: Randi Wissler-Mitchell, 2014.

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Oral narration in modern French: A linguistic analysis of temporal patterns. London: Legenda, 2005.

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8

Progressives, patterns. pedagogy: A corpus-driven approach to English progressive forms, functions, contexts, and didactics. Amsterdam: J. Benjamins Pub. Co., 2005.

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Serbo-Croatian. München, Germany: Lincom Europa, 1997.

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Kopsky, V. Tensor Parameters of Ferroic Phase Transitions: Theory and Tables. Taylor & Francis, 2001.

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Частини книг з теми "Phase tensor"

1

Zhao, Kun, Hui Zhang, Yitian Zhao, Jianyang Xie, Yalin Zheng, David Borroni, Hong Qi, and Jiang Liu. "Automated Corneal Nerve Segmentation Using Weighted Local Phase Tensor." In Communications in Computer and Information Science, 459–69. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-39343-4_39.

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Eshelby, J. D. "Energy Relations and the Energy-Momentum Tensor in Continuum Mechanics." In Fundamental Contributions to the Continuum Theory of Evolving Phase Interfaces in Solids, 82–119. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-59938-5_5.

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Wang, Jian, Xian-Hua Han, Jiande Sun, Lanfen Lin, Hongjie Hu, Yingying Xu, Qingqing Chen, and Yen-Wei Chen. "Focal Liver Lesion Classification Based on Tensor Sparse Representations of Multi-phase CT Images." In Advances in Multimedia Information Processing – PCM 2018, 696–704. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00767-6_64.

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Eklund, Anders, Daniel Forsberg, Mats Andersson, and Hans Knutsson. "Using the Local Phase of the Magnitude of the Local Structure Tensor for Image Registration." In Image Analysis, 414–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21227-7_39.

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Song, Jian, Sihang Zhu, Lanfen Lin, Hongjie Hu, and Yen-Wei Chen. "Tensor-Based Subspace Learning for Classification of Focal Liver Lesions in Multi-phase CT Images." In Advances in Natural Computation, Fuzzy Systems and Knowledge Discovery, 601–8. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32456-8_66.

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Wang, Jian, Junlin Zhao, Xian-Hua Han, Lanfen Lin, Hongjie Hu, Yingying Xu, Qingqing Chen, Yutaro Iwamoto, and Yen-Wei Chen. "Automated Retrieval of Focal Liver Lesions in Multi-phase CT Images Using Tensor Sparse Representation." In Innovation in Medicine and Healthcare, 217–27. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-3013-2_18.

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Yanagihara, Ryosuke. "Distribution of Energy Momentum Tensor around Single Static Quark in Deconfined Phase of SU(3) Yang–Mills Theory." In Springer Theses, 89–102. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-6234-8_5.

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Dahl, Verena. "Mikrostruktur Polymerdotierter Lamellarer Phasen." In Polymerdekorierte Tensid-Doppelschichten, 71–124. Wiesbaden: Springer Fachmedien Wiesbaden, 2010. http://dx.doi.org/10.1007/978-3-658-24044-8_4.

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Dahl, Verena. "Dynamik Polymerdekorierter Lamellarer Phasen." In Polymerdekorierte Tensid-Doppelschichten, 125–35. Wiesbaden: Springer Fachmedien Wiesbaden, 2010. http://dx.doi.org/10.1007/978-3-658-24044-8_5.

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Visintin, Augusto. "Stefan Problem with Surface Tension." In Mathematical Models for Phase Change Problems, 191–213. Basel: Birkhäuser Basel, 1989. http://dx.doi.org/10.1007/978-3-0348-9148-6_9.

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Тези доповідей конференцій з теми "Phase tensor"

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Laksono, A. B., W. P. Anggraini, B. S. Mulyatno, and C. Iskandar. "Magnetotelluric Phase Tensor Application to Geothermal Modelling." In EAGE-HAGI 1st Asia Pacific Meeting on Near Surface Geoscience and Engineering. Netherlands: EAGE Publications BV, 2018. http://dx.doi.org/10.3997/2214-4609.201800402.

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FitzGerald, D. J., H. Holstein, A. B. Reid, and E. Biegert. "The amplitude / phase treatment of full tensor gradiometry." In 10th SAGA Biennial Technical Meeting and Exhibition. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609-pdb.146.9.4.

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Ford, Joseph E., Groff Bittner, Sing H. Lee, and Shaya Fainman. "Matrix-Tensor Multiplication Using Phase-Coded Optical Correlation." In 33rd Annual Techincal Symposium, edited by Bahram Javidi. SPIE, 1990. http://dx.doi.org/10.1117/12.962221.

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Petrini, Ana Luísa, José Luiz Boldrini, Carlos Lamarca Carvalho Sousa Esteves, and Marco Bittencourt. "Phase field tensor model for damage induced anisotropy." In 8th International Symposium on Solid Mechanics. ABCM, 2022. http://dx.doi.org/10.26678/abcm.mecsol2022.msl22-0094.

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FitzGerald, D. J., A. B. Reid, H. Holstein, and E. Biegert. "The amplitude/phase treatment of full‐tensor gradiometry." In SEG Technical Program Expanded Abstracts 2007. Society of Exploration Geophysicists, 2007. http://dx.doi.org/10.1190/1.2792525.

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Djeddi, M., and A. Boukar. "The Magnetotelluric Impedance Tensor Analysis Using the Phase Tensor Method - Comparative Study and Application to Field." In Near Surface Geoscience 2012 – 18th European Meeting of Environmental and Engineering Geophysics. Netherlands: EAGE Publications BV, 2012. http://dx.doi.org/10.3997/2214-4609.20143491.

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Neukirch, M., D. Rudolf, and X. Garcia. "The Magnetotelluric Amplitude Tensor as Compliment to the Phase Tensor for Mapping, Inversion and Distortion Analysis." In 78th EAGE Conference and Exhibition 2016. Netherlands: EAGE Publications BV, 2016. http://dx.doi.org/10.3997/2214-4609.201601092.

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Hejazi, Farzam, Mohsen Joneidi, and Nazanin Rahnavard. "A Tensor-based Localization Framework Exploiting Phase Interferometry Measurements." In 2020 IEEE International Radar Conference (RADAR). IEEE, 2020. http://dx.doi.org/10.1109/radar42522.2020.9114560.

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Lesieur, Thibault, Leo Miolane, Marc Lelarge, Florent Krzakala, and Lenka Zdeborova. "Statistical and computational phase transitions in spiked tensor estimation." In 2017 IEEE International Symposium on Information Theory (ISIT). IEEE, 2017. http://dx.doi.org/10.1109/isit.2017.8006580.

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Elek, Francis, and Anthony Grbic. "Phase and power flow along printed-circuit tensor impedance surfaces." In 2014 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting. IEEE, 2014. http://dx.doi.org/10.1109/aps.2014.6904711.

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Звіти організацій з теми "Phase tensor"

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Yang, Xiaoning, Charlotte Anne Rowe, and Howard John Patton. Moment-Tensor Spectra of SPE Phase I Explosions. Office of Scientific and Technical Information (OSTI), April 2017. http://dx.doi.org/10.2172/1352433.

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Author, Not Given. Source Spectra Analysis of SPE Phase I from Frequency-Domain Moment Tensor Inversion. Office of Scientific and Technical Information (OSTI), November 2017. http://dx.doi.org/10.2172/1407858.

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Hubbard, Camden R. Neutron Diffraction Residual Strain Tensor Measurements Within The Phase IA Weld Mock-up Plate P-5. Office of Scientific and Technical Information (OSTI), September 2011. http://dx.doi.org/10.2172/1025403.

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Bradford, Teresa Kay. Changes in Interfacial Tension with Time in Two-Liquid-Phase Systems. Office of Scientific and Technical Information (OSTI), July 2018. http://dx.doi.org/10.2172/1461395.

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Lam, Terence, and Keith Gale. Construction frameworks in the public sector: Do they deliver what they promise? Property Research Trust, November 2021. http://dx.doi.org/10.52915/sbuk7331.

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Анотація:
We demonstrate that the use of Performance Frameworks for the procurement of construction projects by public sector organizations in the UK (specifically, in England) leads to significantly improved outcomes in terms of time, cost, quality, sustainability and closer relationships, than the traditional ‘open tender’ approach of procuring discrete projects, individually. We identify the factors that lead to such improvements. We label these: supplier’s task performance factors (project staff, execution approach, competence of firm and structure of firm); supplier’s contextual performance factors (trust and collaboration, culture and conscious behaviour); and client’s organisational factors (incentives, performance monitoring, procurement approach and communication). And we offer a performance improvement model that will help project managers to select the most appropriate suppliers at the procurement phase, to achieve successful project outcomes. The model can also be used to drive project performance further, by adopting client’s organisational factors during the procurement and construction phases. By applying the research conclusions, suppliers will be able to focus on communicating their strengths in the relevant aspects of task and contextual performance for technical tender proposals, and so increase the value of their services and the probabilities of winning work. And the analysis can be used by policy makers to help in drafting regulations and legislation on formal frameworks, in ways that will improve the delivery of policy objectives.
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Anderson, Neal S., A. Koray Tureyen, and Donald F. Meinheit. Phase II, Design Criteria for Headed Stud Groups in Combined Tension and Shear. Precast/Prestressed Concrete Institute, 2007. http://dx.doi.org/10.15554/pci.rr.conn-005.

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Poppeliers, Christian, Katherine Anderson Aur, and Leiph Preston. The use of atmospheric prediction models to invert infrasound for linear-equivalent time domain moment tensors: Source Physics Experiment Phase 1. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1468382.

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Weiss, Charles, William McGinley, Bradford Songer, Madeline Kuchinski, and Frank Kuchinski. Performance of active porcelain enamel coated fibers for fiber-reinforced concrete : the performance of active porcelain enamel coatings for fiber-reinforced concrete and fiber tests at the University of Louisville. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40683.

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Анотація:
A patented active porcelain enamel coating improves both the bond between the concrete and steel reinforcement as well as its corrosion resistance. A Small Business Innovation Research (SBIR) program to develop a commercial method for production of porcelain-coated fibers was developed in 2015. Market potential of this technology with its steel/concrete bond improvements and corrosion protection suggests that it can compete with other fiber reinforcing systems, with improvements in performance, durability, and cost, especially as compared to smooth fibers incorporated into concrete slabs and beams. Preliminary testing in a Phase 1 SBIR investigation indicated that active ceramic coatings on small diameter wire significantly improved the bond between the wires and the concrete to the point that the wires achieved yield before pullout without affecting the strength of the wire. As part of an SBIR Phase 2 effort, the University of Louisville under contract for Ceramics, Composites and Coatings Inc., proposed an investigation to evaluate active enamel-coated steel fibers in typical concrete applications and in masonry grouts in both tension and compression. Evaluation of the effect of the incorporation of coated fibers into Ultra-High Performance Concrete (UHPC) was examined using flexural and compressive strength testing as well as through nanoindentation.
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Zhou, Yijie, Hyun-Kyung Lim, Valmor F. de Almeida, Ray Navamita, Shuqiang Wang, James G. Glimm, Xiao-lin Li, and Xiangmin Jiao. Development of a Front Tracking Method for Two-Phase Micromixing of Incompressible Viscous Fluids with Interfacial Tension in Solvent Extraction. Office of Scientific and Technical Information (OSTI), June 2012. http://dx.doi.org/10.2172/1081899.

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Miller, James, Anthony Latino, Chandana Konidala, and Raymond Patenaude. Army R-22 refrigerant phase-out strategy. Engineer Research and Development Center (U.S.), March 2021. http://dx.doi.org/10.21079/11681/40039.

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Анотація:
R-22 (also known as HCFC-22) is one of the most widely used refrigerants in U.S. Army air-conditioning and refrigeration (AC&R) systems since the phase-out of R-12 refrigerant in 1995. The need to phase out R-22 is attributed to its global warming potential and high ozone-depleting capability. The U.S. Army has tens of thousands of aging AC&R systems that will remain dependent on R-22, or one of the recently developed substitutes for R-22, until they reach the end of their operational life. This project conducted a survey to understand the current R-22 usage and types of R-22 AC&R equipment that are in use across U.S. Army Installation Management Command (IMCOM) installations. This study describes several methods to remove or retrofit R-22 from typical AC&R equipment and implementation strategies to meet the stated goal of eliminating R-22 from IMCOM installations. The scope of this project included the review of BUILDER SMS data for IMCOM installations, which included data on 13,000 pieces of comfort cooling equipment for 31 installations. The report also provides an analysis of several R-22 alternatives and their physical properties and compatibility. Mission critical tactical cooling that uses R-22 refrigerant was not within the scope of this project.
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