Comparative Calibration Models
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Sensitivity and Specificity of Cephalometric Measures for the Diagnosis of Sagittal Skeletal Malocclusion
Abstract Objective: To evaluate and compare sensitivity and specificity of ANB, Wits, APDI and AF-BF to diagnose sagittal skeletal malocclusions, in children between 6 to 12 years old, using ROC curves, a widely accepted method for the analysis and evaluation of diagnostic tests. Material and Methods: A descriptive-comparative study of diagnostic tests was
Pesqui. Bras. Odontopediatria Clín. Integr.. Publicado em: 02/09/2019
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2. In situ Determination of K, Ca, S and Si in Fresh Sugar Cane Leaves by Handheld Energy Dispersive X-Ray Fluorescence Spectrometry
A portable energy dispersive X-ray fluorescence spectrometer was evaluated in the in situ analysis of fresh sugar cane leaves for real time plant nutrition diagnosis. Fresh leaf fragments (n = 10 sugar cane varieties; 20 fragments per leaf; 2 measurement sites per fragment) were irradiated and the averaged data from X-ray characteristic emission lines intens
J. Braz. Chem. Soc.. Publicado em: 2018-05
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3. Automatic Calibration of Pipe Roughness in Water Distribution Systems by using Genetic Algorithms / Calibração Automática de Rugosidades de Tubulações em Sistemas de Distribuição de Água com Aplicação de Algoritmos Genéticos
Simulation of hydraulic equilibrium conditions on distribution network is fundamental to technically analyze water supply systems. In order to reproduce reliable results on fluids flow by using simulation models it is very important that the system parameters are precisely evaluated. Considering the resistance coefficient of pipes as the most difficult varia
Publicado em: 2006
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4. Estudo comparativo entre tecnicas de inteligencia artificial e modelos lineares em determinações quantitativas no infravermelho proximo
In this work it was done a comparative study among the performances of different artificial intelligence techniques and two multivariate linear calibration methods (Multiple Linear Regression and Partial Least Squares), in three different chemical systems for quantitative determination in the near infrared region. The artificial intelligence techniques are a
Publicado em: 2003
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5. Estimação e testes de hipóteses em calibração comparativa / Estimationin hypotheses testings of comparative calibration
We know about the literature that Comparative Calibration it is linked the efficiency comparison of measurement instruments. In this work we discuss estimates and tests of hypotheses in comparative calibration models. For the estimate of the parameters of the model, we consider the EM algorithm and the algorithm BFGS in the program Ox. Testings for some hypo
Publicado em: 2001
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6. Avaliação do uso da espectroeletroquimica na determinação simultanea de metais empregando metodos quimiometricos
This work describes the construction of a spectroelectrochemical cell with an optical path of 1 mm and a platinum minigrating as an optically transparent electrode. The cell was characterised by means of electrochemical and spectroelectrochemical experiments, using a 5.0 mmol L potassium ferrocyanate solution. After this characterisation, the spectroelectroc
Publicado em: 2001
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7. Influencia local em modelos de calibração comparativa
In this work we consider some diagnostics aspects in a special sub-class of a general models with measurements of erros; such models are specially designed to compare measuring devices. This problem is known in the literature as Comparative Calibrations. First, we considered a study of analysis of influence in linear regression models and the method of local
Publicado em: 2000
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8. Issues in cDNA microarray analysis: quality filtering, channel normalization, models of variations and assessment of gene effects
We consider the problem of comparing the gene expression levels of cells grown under two different conditions using cDNA microarray data. We use a quality index, computed from duplicate spots on the same slide, to filter out outlying spots, poor quality genes and problematical slides. We also perform calibration experiments to show that normalization bet
Oxford University Press.
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9. Calibration of estimated biting forces in domestic canids: comparison of post-mortem and in vivo measurements
Estimates of biting forces are widely used in paleontological and comparative studies of feeding mechanics and performance, and are usually derived from lever models based on measurements made on the skull that are relevant to the mechanics of the masticatory system. Owing to assumptions and unmeasurable errors in their estimation, such values are used compa
Blackwell Science Inc.