Mathematic Models
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Utilizing the Shift-or-Shrink Algorithm to Optimize the Direct Coupling from Laser Diodes to Diffused Channel Waveguides
Abstract Several formulae for computing the direct coupling efficiencies from laser diodes to diffused channel waveguides, based on mathematic models for approximating the corresponding laser beams and the waveguiding modes, have been derived in this paper. Then, the authors utilize a simple shift-or-shrink (SOS) algorithm to seek their optimal coupling cond
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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2. Modelamiento de la respiración del mango (Mangifera indica l.) usando el método de sistema cerrado a diferentes temperaturas
Abstract Measuring the respiration rate of fresh products is essential to design correct of packaging systems. For such effect, rates of consumption of O2 and production of CO2, usually are taken are initial data of system comportment. The aim of this work, was modelling the respiration of whole mango (Mangifera indica L.), variety Tommy Atkins using a clos
Rev. Bras. Frutic.. Publicado em: 25/06/2018
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3. Gestión de recursos humanos en la empresa, desempeño y sentido de compromiso
ABSTRACT Objective: The objective was to measure and to evaluate the construct “sense of commitment”, to insert it in the activities of Human Resources Management (HRM). Design/methodology/approach: The used methods were interviews, mathematic modeling, and statistical correlation. Findings: As the results, mathematical models were obtained and use
Rev. bras. gest. neg.. Publicado em: 2015-06
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4. Representación matemática de una terapéutica: circulación de inscripciones tecnocientíficas en el tratamiento de la litotripsia extracorporal
Within the social sciences, the standardized notion of representation refers to knowledge expressed through language and sourced from supra-individual thought processes. This notion underscores the social foundation of knowledge while minimizing its inherent material and symbolic foundations, without which it cannot be wholly understood. The article argues t
História, Ciências, Saúde-Manguinhos. Publicado em: 2011-09
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5. Parametrização e avaliação do modelo DSSAT/CANEGRO para variedades brasileiras de cana-de-açucar / Parameterization and evaluation of DSSAT/CANEGRO model for Brazilian sugarcane varieties
O aumento da importância da cultura da cana-de-açúcar nos últimos anos atraiu de investimentos ao setor sucro-alcooleiro, tornando o planejamento estratégico uma ferramenta essencial na orientação para expansão da cultura em novas áreas e otimização da produção nas áreas tradicionais de cultivo. A modelagem agrícola, por isso, ganhou importân
Publicado em: 2011
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6. Modelagem matemática na previsão de colheita de bananeira: regressão linear múltipla x redes neurais artificiais / Mathematical modeling to predict crop of banana: multiple regression x neural networks
One of the barriers relevant to the banana crop in Brazil is the lack of productive commercial varieties with adequate size, resistant to major pests and diseases and adapted to different ecosystems. The development of cultivars is the strategy for solving this problem through breeding programs, as well as its characterization and evaluation in areas of prod
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/12/2010
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7. Development of mathematic models involving nutritional levels, performance and carcass yield to optimize economic results of broilers chickens / Desenvolvimento de modelos matemáticos envolvendo níveis nutricionais, desempenho e rendimento de carcaça para otimização de resultados econômicos de frangos de corte
Foram elaborados modelos de superfície de resposta, a partir de dados da literatura localizados através da técnica de revisão sistemática, para predizer o ganho de peso, consumo de ração e conversão alimentar de frangos de corte em função da energia metabolizável da ração, temperatura ambiente, idade de abate e sexo dos animais. Com as equaçõe
Publicado em: 2010
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8. MODELAGEM INDIVIDUAL E EM TEMPO REAL DAS EXIGÊNCIAS NUTRICIONAIS DE SUÍNOS EM CRESCIMENTO / MODELING INDIVIDUAL AND IN REAL TIME OF THE NUTRIENT REQUIREMENTS FOR GROWTH PIGS
Two studies were realized with the objective (i) to describe and to establish the limitations of the empirical and factorial methods used to estimate nutritional requirements and (ii) develop a mathematic model able to estimate the daily nutrient requirements of individual pigs in real time. For this purpose, in the first study a systematic analysis was carr
Publicado em: 2010
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9. MODELOS DE PREVISÃO APLICADOS AO CONTROLE DE QUALIDADE COM DADOS AUTOCORRELACIONADOS / FORECAST MODEL APPLIED TO QUALITY CONTROL WITH AUTOCORRELATIONAL DATA
This research has a topic forecast models applied to industrial productive processes with the objective of verifying the stability of the process through control charts applied to the residues originated from linear and non-linear model. In the presence of autocorrelation data, it was necessary to look for a mathematical model which are produce independent a
Publicado em: 2009
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10. Reconstrução tridimensional de meios porosos utilizando técnicas de simulated annealing
The characterization of porous materials constitutes a problem of scientific and technological interest. Determination of the macroscopic properties of the porous medias have application in many areas, such as production of petroleum, civil and mechanical engineering, for example. In the present work are presented computational methods to estimate the intrin
Publicado em: 2009
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11. Modelagem e anÃlise de especificaÃÃes de sistemas de tempo-real crÃticos com restriÃÃes de energia
Requirements analysis is a critical task in any Embedded Real-Time System (ERTS) project. Normally, these systems have stringent timing constraints that must be satisÂed for the correct functioning, since violation might be catastrophic, such as loss of human lives or large amount of Ânancial resources. In addition, there are systems where energy is anothe
Publicado em: 2009
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12. PRE AND POST WEANING PERFORMANCE EVALUATION FOR A MULTIBREED ABERDEEN ANGUS X NELLORE POPULATION USING DIFFERENT GENETIC MODELS / AVALIAÇÃO DO DESEMPENHO NA PRÉ E PÓS DESMAMA PARA UMA POPULAÇÃO BOVINA MULTIRRACIAL ABERDEEN ANGUS X NELORE UTILIZANDO DIFERENTES MODELOS GENÉTICOS
The objective of this study was to estimate the genetic effects that affect the pre and post weaning performances of animals, products from Aberdeen Angus (A) and Nellore (N) breeds crosses. In Article 1, there were used the weaning weights (PD) to test five genetic models (M). The M1, complete, containing the fix breed genetic effects direct additive (AD) a
Publicado em: 2009