Effort Estimation
Mostrando 1-12 de 44 artigos, teses e dissertações.
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1. Upstream dam impacts on gilded catfish Brachyplatystoma rousseauxii (Siluriformes: Pimelodidae) in the Bolivian Amazon
ABSTRACT This paper explores the effects of two run-of-river dams (Jirau and Santo Antônio) built in cascade in the middle Madeira River (Brazil) on the interruption of long-distance migration routes of the gilded catfish (Brachyplatystoma rousseauxii). A participative monitoring system was set up to compare capture by commercial fishers approximately 1500
Neotrop. ichthyol.. Publicado em: 02/12/2019
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2. Applying COCOMO II for a DO-178C Safety-Critical Software Effort Estimation
ABSTRACT: This paper provides a real example of applying COCOMO II as an estimation technique for the required software development effort in a safety-critical software application project following the DO-178C processes. The main goal and contribution of the case study is to support the research on software effort estimation and to provide software practiti
J. Aerosp. Technol. Manag.. Publicado em: 28/03/2019
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3. Wheel-surface model parameters estimation: sand humidity influence on traction effort of all-terrain unmanned vehicle
Abstract The aim of the paper is to present the experimental results for material model of the sand, case of wet and dry probe. Since traction and side forces derivation methodology and tire-round interaction models for on-road vehicles are widely described, there is a lack of methods for off-road vehicles. The methodology, presented in this work, includes t
Lat. Am. j. solids struct.. Publicado em: 18/02/2019
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4. Sampling procedures for inventory of commercial volume tree species in Amazon Forest
ABSTRACT The spatial distribution of tropical tree species can affect the consistency of the estimators in commercial forest inventories, therefore, appropriate sampling procedures are required to survey species with different spatial patterns in the Amazon Forest. For this, the present study aims to evaluate the conventional sampling procedures and introduc
An. Acad. Bras. Ciênc.. Publicado em: 2017-09
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5. Evaluation of Conceptual Midcourse Guidance Laws for Long-Range Exoatmospheric Interceptors
ABSTRACT: This paper presents a comprehensive study on the performance analysis of 8 conceptual guidance laws for exoatmospheric interception of ballistic missiles. The problem is to find the effective thrust direction of interceptor for interception of short-to-super range ballistic missiles. The zero-effort miss and the generalized required velocity concep
J. Aerosp. Technol. Manag.. Publicado em: 2017-03
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6. Sampling technique affects the population structure assessments of fiddler crab Minuca vocator (Herbst, 1804) (Ocypodidae: Gelasiminae)
Abstract We examined how the sampling technique can affect the evaluation of Minuca vocator (Herbst, 1804) population structure. We used two sampling procedures: catch-per-unit-effort (CPUE) and quadrat technique (QT). Body size, size-frequency distribution, population density, juvenile recruitment rates, proportion of ovigerous females and sex ratio were co
Nauplius. Publicado em: 20/10/2016
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7. Humpback whale Megaptera novaeangliae (Cetartiodactyla: Balaenopteridae) group sizes in line transect ship surveys: An evaluation of observer errors
ABSTRACT Accurate estimates of group sizes through line transect sampling methods are important to correctly ascertain the abundance of animals that occur in groups. Since the average observed group size is a component of the distance sampling formula, bias in these data leads to biased abundance estimates. This study aimed to evaluate the potential errors i
Zoologia (Curitiba). Publicado em: 06/05/2016
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8. State estimation of chemical engineering systems tending to multiple solutions
A well-evaluated state covariance matrix avoids error propagation due to divergence issues and, thereby, it is crucial for a successful state estimator design. In this paper we investigate the performance of the state covariance matrices used in three unconstrained Extended Kalman Filter (EKF) formulations and one constrained EKF formulation (CEKF). As bench
Braz. J. Chem. Eng.. Publicado em: 2014-09
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9. Propeller-induced Effects on the Aerodynamics of a Small Unmanned Aerial Vehicle
Abstract: The present paper has discussed investigations about the propeller slipstream effects on the aerodynamics of a generic unmanned air vehicle platform in the wind tunnel for a broad advance ratio range. The propeller-induced effects for small unmanned air vehicles are more significantly pronounced than general aviation aircraft, because of their high
J. Aerosp. Technol. Manag.. Publicado em: 2012-12
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10. Nonparametric intensity bounds for the detection and delineation of spatial clusters
There is considerable uncertainty in the disease rate estimation for aggregated area maps, especially for small population areas. As a consequence the delineation of local clustering is subject to substantial variation. Consider the most likely disease cluster produced by any given method, like SaTScan Kulldorff [2006], for the detection and inference of spa
Publicado em: 2011
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11. Desenvolvimento e aplicação de procedimento metodológico em suporte ao planejamento participativo para redução de perda de solos em pequenas bacias hidrográficas com emprego da EUPS
The agrosilvipastoral activity has impacted negatively the environment worldwide, promoting soil erosion and sediment settling in water bodies. The Universal Soil Loss Equation (USLE) estimates the rates of laminar erosion (A; in ton/acre/year) by the multiplication of six parameters: A = RKLSCP (R: rainfall erosivity factor; K = soil erodibility factor; S:
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2010
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12. Krigagem com deriva externa aplicada à avaliação de recursos minerais de calcário e de minério laterítico / Kriging witch external drift applied to evaluation of mineral resources of limestone and lateritic ore
This dissertation is a work on applied geostatistics to evaluation of mineral resources. This application can be considered as the last step to such the task. The basic concepts are based on current geostatistics, with extensive use of informatics resources. The first goal of this work was to test the technique named kriging with external drift in the evalua
Publicado em: 2010