Curve Fitting
Mostrando 1-12 de 138 artigos, teses e dissertações.
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1. Nomogram for predicting post-traumatic hydrocephalus after decompressive craniectomy for traumatic brain injury
SUMMARY OBJECTIVE: This study aimed to develop and validate a practical nomogram to predict the occurrence of post-traumatic hydrocephalus in patients who have undergone decompressive craniectomy for traumatic brain injury. METHODS: A total of 516 cases were enrolled and divided into the training (n=364) and validation (n=152) cohorts. Optimal predictors w
Revista da Associação Médica Brasileira. Publicado em: 2022
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2. Physics-Based Design of Microstrip Magnetic Dipoles Using Cavity Model
Abstract This paper presents an efficient technique of microstrip magnetic dipoles design that explores the physics ruling the antenna behavior not restricting to parametric analyses in a full-wave simulation software. The proposed approach makes use of the cavity model whose parameters are progressively enhanced by using full-wave electromagnetic simulation
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-03
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3. PRACTICAL ASPECTS OF THE ANALYSIS OF THE PROGRESSION CURVES OF FIRST AND PSEUDO-FIRST ORDER REACTIONS
The paper presents a simple method of determining iteratively the progression curve asymptote for first and pseudo-first order reactions. For selected student exercises, thus obtained results were compared (see Supplementary Material) with those found by means of the method of determining asymptotes experimentally. A nonlinear fitting method was additionally
Quím. Nova. Publicado em: 2020-01
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4. Revised formula for predicting the long-term deflection multiplier of normal and high strength concrete
Abstract High strength concrete (HSC) has found many applications in civil engineering structures such as in high-rise buildings, and bridges. The mechanical properties of HSC are sometimes different than of normal strength concrete (NSC). In particular, HSC possess lower creep strains compared to NSC. As a result, members constructed using HSC have been fou
Rev. IBRACON Estrut. Mater.. Publicado em: 13/12/2019
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5. Evaluation of a rat model of exercise-induced fatigue using treadmill running with progressively increasing load
Abstract: The mechanism behind exercise-induced fatigue is a significant topic in the field of sports physiology. Therefore, establishing and evaluating an acute exercise-induced fatigue animal model that explores the limits of the motor system may provide greater insight into these mechanisms. Heart rate is an important quantitative parameter that accuratel
An. Acad. Bras. Ciênc.. Publicado em: 02/12/2019
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6. On the Improvement of Multiple Circles Detection from Images using Hough Transform
RESUMO A detecção de retas e curvas em imagens é uma tarefa de grande importância em diversas aplicações, como no reconhecimento de objetos e reconstrução de cenas. Apesar de haver fórmulas fechadas para o ajuste de curvas a um conjunto de pontos dados, se os pontos descrevem mais de uma instância do objeto, como dois círculos por exemplo, não h�
TEMA (São Carlos). Publicado em: 16/09/2019
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7. A Note on Parameter Identification of the AISI 304 Stainless Steel Using Micromechanical-Based Phenomenological Approaches
Austenitic stainless steels have largely been used in industrial equipment, architectural components and consumer items amongst others. Numerical simulation of manufacturing processes of such components and parts requires adequate hardening descriptions and accurate inelastic parameters. This work addresses these issues for the AISI 304 stainless steels base
Mat. Res.. Publicado em: 19/08/2019
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8. Performance of the Groenevelt and Grant Model for Fitting Soil Water Retention Data from Brazilian Soils
ABSTRACT The soil water retention curve (SWRC) is essential for vadose zone hydrological modeling and related applications. In 2004, Groenevelt and Grant (GRT) presented a mathematical model for describing the SWRC and reported its mathematical versatility and good fit to soils from a Dutch database. In order to evaluate the application of GRT to SWRCs of Br
Rev. Bras. Ciênc. Solo. Publicado em: 22/07/2019
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9. ON AN INTEGRATED DYNAMIC CHARACTERIZATION OF VISCOELASTIC MATERIALS BY FRACTIONAL DERIVATIVE AND GHM MODELS
Abstract The passive vibration control of mechanical systems under unwanted vibrations can be accomplished in a very effective way by using devices incorporating viscoelastic materials. The design of such devices requires a broad knowledge of the dynamic properties of the employed viscoelastic material, usually supplied by adequate mathematical models. Among
Lat. Am. j. solids struct.. Publicado em: 14/03/2019
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10. Ultimate strength formulations for FPSO stiffened panels under combined compression and shear with initial imperfections and damage
Abstract Accidental collision of striking objects, such as a supply vessel, into the side panel of a FPSO highly influences its ultimate strength assessment. An empirical formula for predicting the ultimate strength of damaged stiffened panels under combined loading of shear and longitudinal compression is empirically derived in this work based on curve fitt
Lat. Am. j. solids struct.. Publicado em: 29/10/2018
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11. Use of modified Richards model to predict isothermal and non-isothermal microbial growth
Abstract Mathematical models are often used to predict microbial growth in food products. An important class of these models involves the adaptation of classical sigmoid functions, such as the Gompertz and logistic functions. This study aimed to validate the use of the modified Richards model in various situations, which have not previously been tested. The
Braz. J. Microbiol.. Publicado em: 2018-09
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12. Growth Patterns of Two Chinese Native Goose Breeds
ABSTRACT To study the development rules of Chinese native geese, two breeds, Shitou and Sichuan White geese were analyzed from 0 to 12 weeks of age. The growth curves were fitted with commonly used four kinds of nonlinear models (Logistic, Gompertz, Von Bertalanffy and Richards). The results showed that the growth curves were appropriately fitted with all fo
Rev. Bras. Cienc. Avic.. Publicado em: 2017-06