Geometric Project
Mostrando 1-12 de 38 artigos, teses e dissertações.
-
1. Evaluation of an iron ore price forecast using a geometric Brownian motion model
Abstract Mining projects are often budgeted in millions of dollars, making it of interest to the investor to measure a project’s uncertainties and risks, which include the changes in the commodity price. The simulation of asset prices is valid because it enables displaying, with a degree of certainty, the future behavior of a financial asset. One of the mo
REM, Int. Eng. J.. Publicado em: 2019-03
-
2. Development and application of a flexible numerical model to evaluate the safety of room-and-pillar mines
Abstract The design of room-and-pillar mines relies on the correct estimation of the safety indicator of the underground structures formed by the excavation of drifts. Thus, the study of the geomechanical behavior is of vital importance. The mathematical models play an important role in the identification of problematic areas and allows different configurati
REM, Int. Eng. J.. Publicado em: 2019-03
-
3. Direct block scheduling under marketing uncertainties
Abstract Mineral projects are composed of geological, operational and market uncertainties, and reducing these uncertainties is one of the objectives of engineering. Most surveys assess the impact of geological and operational uncertainties on the mining planning. The objective of this work is to study the impact of market uncertainty on the mineral activity
REM, Int. Eng. J.. Publicado em: 2018-04
-
4. The Challenges of Rehabilitating the Hercilio Luz Suspension Bridge
Abstract The Hercílio Luz suspension bridge, built in 1926, has been out of service since 1991 due to high corrosion levels and structural element impairment. A complete rehabilitation project was developed which included the replacement of the impaired items and foundation strengthening. For this, an auxiliary structure was employed to support the central
Lat. Am. j. solids struct.. Publicado em: 2017-03
-
5. Experimental dryer design for agricultural products
ABSTRACT This study consisted of designing and building an experimental dryer that allows working with different temperatures and velocities of the air, aiming to perform studies on thin- and thick-layer drying of agricultural products. The project was divided into three stages: heat source designing, dryer geometric parameters, and fan selection to meet ope
Eng. Agríc.. Publicado em: 2016-10
-
6. Geração de b-splines via FPGA / B-spline generation via FPGA
The b-splines are used in CAD/CAM/CAE systems to represent and define complex curves and surfaces, being adopted by the main computer graphics standards due to features like compact mathematic representation, flexibility and affine transformations. In 3D acquisition systems and integrated CAM-CNC systems, the use of the b-spline in the geometric information
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2012
-
7. Horizontal and vertical positional accuracy assement of cartographic products of the amazon region derived from interferometric sar data in X and P bands from ORBISAR sensor / Avaliação da acurácia posicional planialtimétrica de produtos cartográficos da Região Amazônica extraídos de dados SAR interferométricos nas bandas X e P do sensor ORBISAR
The Geographic Service of the Brazilian Army (DSG) is running a major mapping project in Brazil, called ´´Radiography Amazon", the region known as ´´Empty Mapping the Amazon." This area, approximately 1,8 million km$^2$, has not had, to date, appropriate land information mapping at scales larger than 1:250,000, except insufficient cartographic documents
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/11/2011
-
8. Reconstrução acústica das salas de cinema projetadas pelo arquiteto Rino Levi / Acoustic Reconstruction of the movie theatres designed by the architect Rino Levi
A historical virtual acoustical reconstruction was developed in five movie theaters designed by the architect Rino Levi from 1936 to 1941, in the cities of São Paulo and Recife, by means of computer simulations. Such approach was chosen because these movie theatres have been demised or are now used with different purposes. Rino Levi is recognized as one of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/04/2011
-
9. Avaliação de mancais hidrodinâmicos com descontinuidades geométricas / Evaluation of hydrodynamic bearings with geometric discontinuities
Hydrodynamic bearings are widely used in rotating machines, being the element responsible for the interaction between the rotor and the supporting structure. Therefore, in order to describe the dynamic behavior of the rotating shafts, it is necessary to know the journal bearings characteristics. For this reason, the purpose of this work is to analyze the dyn
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2011
-
10. Procedimento para análise das condições de segurança oferecidas por interseções não semaforizadas de rodovias de pista simples / Procedure for analyzing the safety conditions of unsignalized instersections on single-lane highways
The geometric characteristics of highway devices can serve to either prevent or stimulate traffic accidents, which can result from a combination of human error, vehicle conditions, and road and weather conditions. Therefore, methods for measuring the impact of these characteristics on the effectiveness of highway safety are helpful in developing more appropr
Publicado em: 2010
-
11. Simulação da geometria e do desempenho do detector de antineutrinos do Projeto Angra / Simulation of the design and performance of the detector antineutrinos Angra Project
In this work is presented a comparative study between some geometries for the Neutrinos Angra Project detector. This Project was born from a colaboration that is dedicated to the construction of a compact antineutrinos detector for monitoring, in real time, the thermal power of Angra II nuclear reactor. Through the antineutrinos ux is possible to get informa
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/11/2009
-
12. Design de artefatos digitais baseados em padrÃes e plataformas
From years 1980 we witness the advent of the digital products that, conceived in geometric progression become each time more incorporeal. Opening, this way, the software project frontlines. Over the digital artifacts designing activity, we are talking about softwares, weâve detected a huge âprojectual emptyâ for solutions reuse and kwonledge transfer. We�
Publicado em: 2009