Coordinates Transformation
Mostrando 1-12 de 37 artigos, teses e dissertações.
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1. How the use of stratigraphic coordinates improves grade estimation
Abstract Some mineral deposits show mineralization along layers. These layers may pass through several subsequent geological events such as folding and/or severe erosional processes. Grades within these deposits tend to be correlated along orientations where the mineralization was originally deposited or along the same geological period (stratigraphic level)
Rem: Rev. Esc. Minas. Publicado em: 2015-12
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2. Nonlinear dynamic analysis of a slender beam under bending and axial force with unilateral contact in elastic winkler support: an application to the study of vibrations of risers in catenary. / Análise dinâmica não-linear de viga esbelta semi-infinita sob flexão composta com contato unilateral em apoio elástico: uma aplicação ao estudo de vibrações de risers em catenária.
Este trabalho visa a avaliar os efeitos dinâmicos em vigas esbeltas semi-infinitas com contato unilateral em apoio elástico sob flexão composta, e sua possível aplicação a dutos flexíveis de extração de petróleo offshore em configuração de catenária (Steel Catenary Risers) provocados por esforços de movimento da plataforma. O estudo se desenvol
Publicado em: 2011
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3. Coordenadas cartesianas X coordenadas geológicas em geoestatística : aplicação à variável vagarosidade obtida por perfilagem acústica
O planejamento da lavra de um depósito mineral envolve o conhecimento de um ou mais atributos desse depósito. Esse conhecimento é obtido através de amostras do atributo em certos locais do depósito. Contudo a coleta de amostras pode envolver elevados custos, o que restringe o número de amostras e os locais onde valores do atributo são conhecidos. Assi
Publicado em: 2010
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4. COMPARAÇÃO DE PROCEDIMENTOS PARA A INTEGRAÇÃO DE LEVANTAMENTOS TOPOGRÁFICOS E LEVANTAMENTOS COM GPS / COMPARISON OF PROCEDURES FOR THE INTEGRATION OF TOPOGRAPHICAL SURVEYS AND GPS SURVEYS
The georeferencing consists of the description of the rural property, characteristics and confrontations, of descriptive memorial containing the border coordinates, georeferenced to the Brazilian Geodetic System following the positioning precision defined by INCRA. The perimeter survey of a rural property can be done only using GPS receivers, or only with to
Publicado em: 2009
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5. The computation of pitch with vectors
A pitch model is proposed which is supported by a vector representation of tones. First, an algorithm capable of performing the vector addition of the spectral components of two-tone harmonic complexes is introduced which initially converts the amplitude, frequency, and phase (AFP) parameters into coordinates of the here introduced quotient, distance in octa
Journal of the Brazilian Computer Society. Publicado em: 2008-09
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6. Dirac equation: representation independence and tensor transformation
We define and study the probability current and the Hamiltonian operator for a fully general set of Dirac matrices in a flat spacetime with affine coordinates, by using the Bargmann-Pauli hermitizing matrix. We find that with some weak conditions on the affine coordinates, the current, as well as the spectrum of the Dirac Hamiltonian, thus all of quantum mec
Brazilian Journal of Physics. Publicado em: 2008-06
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7. Modelagem matemática da condução de calor transiente e quase-estacionária no processo de refusão por eletroescória. / Quasi-steady and transient heat transfer mathematical model for electroslag remelting process.
A mathematical model for heat transfer in the electroslag remelting process (ESR) was implemented using the transient heat conduction equation in cylindrical coordinates. The solution of the equations was facilitated by using a change of the axial coordinate, also known as the Landau transformation, which fixed the calculation domain size during the ingot gr
Publicado em: 2008
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8. Cálculo da elasticidade de cristais líquidos nemáticos através de métodos da geometria diferencial
Found on Frank free energy relation, the bulk elastic constants of the nematic liquid crystals are computed in this work through an approach based on the affine connection method. This consists in the deformation of the isotropic fluid sferical molecules until they acquire an elipsoidal shape, likely the estimated nematic molecules form. Herewith the method
Publicado em: 2007
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9. Determination of critical conditions for the esterification of acetic acid with ethanol in the presence of carbon dioxide
In this work, we present the calculation of critical coordinates for the esterification of acetic acid with ethanol in compressed carbon dioxide. Determination of the critical pressure for this system is useful, since the conversion of this reaction increases with pressure in the two-phase region, reaching a maximum at the critical point. We used a calculati
Brazilian Journal of Chemical Engineering. Publicado em: 2006-09
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10. Remarks on orthotropic elastic models applied to wood
Wood is generally considered an anisotropic material. In terms of engineering elastic models, wood is usually treated as an orthotropic material. This paper presents an analysis of two principal anisotropic elastic models that are usually applied to wood. The first one, the linear orthotropic model, where the material axes L (Longitudinal), R( radial) and T(
Materials Research. Publicado em: 2006-09
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11. Dynamic simulation of constrained mechanical systems using recursive projection algorithm
In this paper, the dynamic simulation of constrained mechanical systems that are interconnected of rigid bodies is studied using projection recursive algorithm. The method uses the concepts of linear and angular momentums to generate the rigid body equations of motion in terms of the Cartesian coordinates of a dynamically equivalent constrained system of par
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-03
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12. "Fusão de imagens médicas para aplicação em sistemas de planejamento de tratamentos em radioterapia" / MEDICAL IMAGES FUSION FOR APPLICATION IN TREATMENT PLANNING SYSTEMS IN RADIOTHERAPY
Software for medical images fusion was developed for utilization in CAT3D radiotherapy and MNPS radiosurgery treatment planning systems. A mutual information maximization methodology was used to make the image registration of different modalities by measure of the statistical dependence between the voxels pairs. The alignment by references points makes an in
Publicado em: 2006