Finite Mixtures
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Elasto-Plastic Stress Analysis in Rotating Disks and Pressure Vessels Made of Functionally Graded Materials
Abstract A new elastio-plastic stress solution in axisymmetric problems (rotating disk, cylindrical and spherical vessel) is presented. The rotating disk (cylindrical and spherical vessel) was made of a ceramic/metal functionally graded material, i.e. a particle-reinforced composite. It was assumed that the material's plastic deformation follows an isotropic
Lat. Am. j. solids struct.. Publicado em: 2016-05
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2. Dynamics of gas bubble growth in oil-refrigerant mixtures under isothermal depressurization
This paper proposes a numerical model to predict the growth of gaseous refrigerant bubbles in oil-refrigerant mixtures with high contents of oil subjected to isothermal depressurization. The model considers an Elementary Cell (EC) in which a spherical bubble is surrounded by a concentric and spherical liquid layer containing a finite amount of dissolved liqu
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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3. Analysis of creep and shrinkage and its utilization in health monitoring of reinforced concrete column. / Análise da deformabilidade por fluência e retração e sua utilização na monitoração de pilares de concreto.
This thesis presents the study of the time dependent deformation of concrete structures due to creep and shrinkage. Creep, shrinkage, compressive strength, splitting tensile strength and modulus of elasticity tests were performed in mixtures commonly used in construction. Experimental parameters were obtained from these mechanical characterizations and creep
Publicado em: 2010
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4. Mixtures modelling using scale mixtures of skew-normal distribution / Misturas finitas de misturas de escala skew-normal
Nesse trabalho será considerada uma classe flexível de modelos usando misturas finitas de distribuições da classe de misturas de escala skew-normal. O algoritmo EM é empregado para se obter estimativas de máxima verossimilhança de maneira iterativa, sendo discutido com maior ênfase para misturas de distribuições skew-normal, skew-t, skew-slash e sk
Publicado em: 2009
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5. Otimização e análise mecânica de pastas geopoliméricas para uso em poços sujeitos à injeção cíclica de vapor
Oil wells subjected to cyclic steam injection present important challenges for the development of well cementing systems, mainly due to tensile stresses caused by thermal gradients during its useful life. Cement sheath failures in wells using conventional high compressive strength systems lead to the use of cement systems that are more flexible and/or ductil
Publicado em: 2008
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6. DISPLACEMENT OF NON-NEWTONIAN LIQUIDS IN ECCENTRIC ANNULI / DESLOCAMENTO DE LÍQUIDOS NÃO NEWTONIANOS EM TUBOS ANULARES EXCÊNTRICOS
In cementing processes of oil wells, the mud formerly used to drag the gravel, to lubricate and to cool the drill is removed and substituted by a cement mixture. This substitution is obtained by the displacement of a fluid by another in the annulus between the rock formation and the casing. For best results of cementing process, intermediate fluids, also cal
Publicado em: 2005
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7. Separation of glucose, fructose, oligosaccharides and dextran using zeolites / Separação de glicose, frutose, oligossacarideos e dextranas utilizando zeolitas
Dextransucrase from Leuconostoc mesenteroides synthesizes dextran from sucrose in the absence of aceptors, and oligosaccharides with maltose or other sugars as aceptors. Fructose is also produced as a by-product. Among several producer strains Leuconostoc mesenteroides NRRL B-512F is the most studied. The commercial value of these products increases with the
Publicado em: 2003
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8. Numerical study of wedge supported oblique shock wave-oblique detonation wave transitions
The results of a numerical study of premixed Hydrogen-air flows ignition by an oblique shock wave (OSW) stabilized by a wedge are presented, in situations when initial and boundary conditions are such that transition between the initial OSW and an oblique detonation wave (ODW) is observed. More precisely, the objectives of the paper are: (i) to identify the
Journal of the Brazilian Society of Mechanical Sciences. Publicado em: 2002-07
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9. Mixtures and Characteristic Functions*
Let g(u|c,y) = exp {yΣck(uk - 1)} with y > 0, Σk=0∞ck = 1,|u| < 1, and c standing for {ck}, be a probability generating function of a nonnegative integer-valued random variable. Let S be a distribution function on (0, ∞) non-degenerate at zero. The functions g and S determine another probability generating function, G(u|Sc) = ∫0∞ gdS(y). One of the
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10. Temperature-dependent growth kinetics of Escherichia coli ML 30 in glucose-limited continuous culture.
Detailed comparison of growth kinetics at temperatures below and above the optimal temperature was carried out with Escherichia coli ML 30 (DSM 1329) in continuous culture. The culture was grown with glucose as the sole limiting source of carbon and energy (100 mg liter(-1) in feed medium), and the resulting steady-state concentrations of glucose were measur