Navegando por Assunto "Gravimetry"

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Acesso aberto (Open Access)
Estudo gravimétrico de resíduos dos grandes geradores supermercadista; atacadista, hotelaria e restaurantes na região metropolitana de Belém - PA
(Universidade Federal do Pará, 2023-02-27) FRANÇA NETO, Raymundo da Costa; NORAT, Maria de Valdivia Costa; http://lattes.cnpq.br/1628995172582591
This study addresses physical characteristics of gravimetry, presenting as a context the characteristic condition of waste for better use of recyclable waste for recycling, with organic solid waste digestible through technologies that can be better used. The main objective of the study is to identify, through gravimetric data, the possible technical relevance for the waste generated by large generators in the metropolitan region of Belém, for a better use of waste. In this way, it will have a contribution to increase the useful life of the sanitary landfill located in the area under study. The importance of gravimetric data for the survival of sanitary landfills is because it is an important tool in terms of the Solid Waste Management Plan, allowing the analysis of quantitative and qualitative data from the gravimetry of large generators, allowing to present the difficulties and possibilities to implement a disposal system with better use of waste and to identify which are the major generators of solid waste in the current situation in the Metropolitan Region of Belém. The development of this research was divided by primary and secondary data; data analysis for the purpose of results regarding the study of gravimetry, descriptive statistics were analyzed; gravimetric analysis by graph; analysis of the gravimetric composition of RS through boxplot graphs; KruskallWallis test – GG; and literary study for foundation. The results of the survey show that the amount of digestible organic matter, as the highest power in the waste, is around 80.9%, confirming that the organic waste from large generators is completely avoidable for disposal in landfills, and should be directed to treatments with technology sustainable production of energy or compounds, leading to relevant reflections on waste to propose composting techniques, generating waste inputs for agriculture.
Acesso aberto (Open Access)
Procedimentos lineares de inversão gravimétrica para estimar o relevo 3D do embasamento de bacias sedimentares
(Universidade Federal do Pará, 2013) RAMOS, Laisse Costa; MARTINS, Cristiano Mendel; http://lattes.cnpq.br/8303640454649778
The technological improvement has provided the acquisition of a large volume of geophysical data, which is why the work of interpretation of gravity anomalies and pet relief sedimentary basins increasingly demand innovation in computational and mathematical formulation that allows for such offer. In order to obtain effective and computationally efficient solutions propose two new methods that incorporate linear inversion procedure for the solution of a nonlinear inversion problem. The first proposed method approximates the solution of the nonlinear inversion by linear inversion procedures and applies corrections in iterations from the initial approach, obeyed until the convergence criterion. The second method proposed solution approximates the nonlinear inversion of the linear inversion procedures only on the first iteration, the second iteration from the additional iterations are applied for correction. The investments made in the two new methods and nonlinear inversion, are stabilized by Tikhonov regularization functional first order (smoothness). The observations are modeled by a set of 3D vertical rectangular prisms whose thicknesses are parameters that define discreetly relief estimated at some points. The realization of nonlinear inversion procedure was necessary to validate the estimated basement relief of sedimentary basins produced by the new proposed methods, this validation is given by comparing the results obtained by the procedures of linear inversion with the inversion of nonlinear . We also evaluate the efficiency and effectiveness of the proposed methods and nonlinear inversion from synthetic tests. The proposed methods have proved more efficient than the nonlinear inversion method, since reduced computational time required to recover virtually identical reliefs. As regards efficiency, we conclude that the proposed methods are as effective as the non-linear inversion, since the estimates of the basement relief scale and are equivalent to each other in shape.
Acesso aberto (Open Access)
Transformação de estimativas suaves aplicadas à interpretação de relevos descontínuos do embasamento
(Universidade Federal do Pará, 2014-08-21) MOREIRA, Mayra Moura; SANTOS, Darcicléa Ferreira; http://lattes.cnpq.br/5813659873067927
We present a method to delineate the basement relief of sedimentary basins composed by vertical faults and horizontal plans. We assume density contrast between the basement and the sediments constant or decrease with depth, and known. The developed method determines the vertical positions for horizontal plans and horizontal positions for vertical faults through an smooth initial solution of the basement relief. We produce this smooth solution through an efficient method which delineates the smooth basement relief. The horizontal positions of two adjacent faults estimates the extension of only one horizontal terrace. Similarly, the vertical position of two adjacent horizontal terraces estimates the extension of the fault between them. The performance of the proposed method is compared with the computational time of two other inversion methods, which stabilize the solution applying the Total Variation functional. The proposed method always produced solutions in less computational time as compared with the computational time required by other methods. Tests on synthetic data contaminated with zero-mean Gaussian pseudorandom noise with a standard deviation of 0.1 mGal show which proposed method produced satisfactory results and estimated basement topographies close to simulated basement topographies. The proposed method was applied to two sets of real Bouguer anomalies: Steptoe Valley (United States) and San Jacinto Graben (United States). The method produced estimated basement topographies presenting high-angle faults in accordance with the available geological information, which the basins above mentioned were formed by extensional tectonics with the consequent formation of structural settings of sedimentary basins conditioned by normal faults.