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Relevant bibliographies by topics / Estimateurs de tangente

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Academic literature on the topic 'Estimateurs de tangente'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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Journal articles on the topic "Estimateurs de tangente"

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Collins, Kent M., and Raymond A. Krammes. "Preliminary Validation of a Speed-Profile Model for Design Consistency Evaluation." Transportation Research Record: Journal of the Transportation Research Board 1523, no. 1 (1996): 11–21. http://dx.doi.org/10.1177/0361198196152300102.

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The validity of a speed-profile model for design consistency evaluation was tested, including (a) the speed reduction estimation ability of the model and (b) assumptions about deceleration and acceleration characteristics approaching and departing horizontal curves. Detailed speed data were collected at a sample of 10 horizontal tangent-curve sections on two-lane rural highways in Texas. The results indicate that the model provides a reasonable, albeit simplified, representation of speed profiles on horizontal alignments consisting of long tangents and isolated curves. The model provides reaso

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Ottesen, Jeffery L., and Raymond A. Krammes. "Speed-Profile Model for a Design-Consistency Evaluation Procedure in the United States." Transportation Research Record: Journal of the Transportation Research Board 1701, no. 1 (2000): 76–85. http://dx.doi.org/10.3141/1701-10.

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A speed-profile model for estimating 85th percentile speeds along horizontal alignments of rural two-lane highways in the United States is documented. The model is an evaluation tool to check for speed consistency violations on alignments with design speeds less than 100 km/h (62.1 mph). The model was calibrated by using speed and geometry data collected for 138 horizontal curves and 78 approach tangents on 29 rural highways in 5 states. A preliminary evaluation suggests that the model provides reasonable estimates of the reductions in 85th percentile speeds from an approach tangent to a horiz

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Lerche, I., and J. A. MacKay. "Model Dependencies of Risk Aversion and Working Interest Estimates." Energy Exploration & Exploitation 14, no. 2 (1996): 183–96. http://dx.doi.org/10.1177/014459879601400215.

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Working interest, W, and risk adjusted value, RA V, are evaluated using both Cozzolino's formula for exponential dependence of risk aversion and also for a hyperbolic tangent dependence. In addition, the general method is given of constructing an RA V formula for any functional choice of risk aversion dependence. Two examples are given to illustrate how the model dependencies influence choices of working interest and risk adjusted value depending on whether the expected value of the project is positive or negative. In general the Cozzolino formula provides a more conservative position for risk

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Madenjian, Charles P., Gary L. Rogers, and Arlo W. Fast. "Estimation of Whole Pond Respiration Rate." Canadian Journal of Fisheries and Aquatic Sciences 47, no. 4 (1990): 682–86. http://dx.doi.org/10.1139/f90-075.

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A regression application of the whole pond respiration–diffusion (WPRD) model to overnight observations of dissolved oxygen concentration (DO) was introduced as a new method to estimate whole pond respiration rate. A new modification of the Welch procedure was also presented. These two techniques were compared with the tangent method for whole pond respiration rate estimation. The tangent method required fitting a quadratic curve to observed DO; and then calculating the slope of the tangent line to the curve at the time the curve reached 100% saturation of DO. When the quadratic was fitted to

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Franz, Astrid. "Hausdorff dimension estimates for invariant sets with an equivariant tangent bundle splitting." Nonlinearity 11, no. 4 (1998): 1063–74. http://dx.doi.org/10.1088/0951-7715/11/4/017.

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FISH, JOEL W. "ESTIMATES FOR J-CURVES AS SUBMANIFOLDS." International Journal of Mathematics 22, no. 10 (2011): 1375–431. http://dx.doi.org/10.1142/s0129167x11007306.

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In this paper, we develop some basic analytic tools to study compactness properties of J-curves (i.e. pseudoholomorphic curves) when regarded as submanifolds. Incorporating techniques from the theory of minimal surfaces, we derive an inhomogeneous mean curvature equation for such curves by establishing an extrinsic monotonicity principle for nonnegative functions f satisfying Δf ≥ -c2f, we show that curves locally parametrized as a graph over a coordinate tangent plane have all derivatives a priori bounded in terms of curvature and ambient geometry, and we thus establish ϵ-regularity for the s

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Idiart, Martín I., and Pedro Ponte Castañeda. "Field statistics in nonlinear composites. I. Theory." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 463, no. 2077 (2006): 183–202. http://dx.doi.org/10.1098/rspa.2006.1756.

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This work presents a means for extracting the statistics of the local fields in nonlinear composites from the effective potential of suitably perturbed composites. The idea is to introduce a parameter in the local potentials, generally a tensor, such that differentiation of the corresponding effective potential with respect to the parameter yields the volume average of the desired quantity. In particular, this provides a generalization to the nonlinear case of well-known formulas in the context of linear composites, which express phase averages and second moments of the local fields in terms o

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Avazmohammadi, Reza, and Pedro Ponte Castañeda. "Tangent Second-Order Estimates for the Large-Strain, Macroscopic Response of Particle-Reinforced Elastomers." Journal of Elasticity 112, no. 2 (2012): 139–83. http://dx.doi.org/10.1007/s10659-012-9404-3.

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Ajeel, Sherzad M., and Hussein A. Hashem. "Comparison Some Robust Regularization Methods in Linear Regression via Simulation Study." Academic Journal of Nawroz University 9, no. 2 (2020): 244. http://dx.doi.org/10.25007/ajnu.v9n2a818.

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In this paper, we reviewed some variable selection methods in linear regression model. Conventional methodologies such as the Ordinary Least Squares (OLS) technique is one of the most commonly used method in estimating the parameters in linear regression. But the OLS estimates performs poorly when the dataset suffer from outliers or when the assumption of normality is violated such as in the case of heavy-tailed errors. To address this problem, robust regularized regression methods like Huber Lasso (Rosset and Zhu, 2007) and quantile regression (Koenker and Bassett ,1978] were proposed. This p

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Streets, Jeffrey. "Pluriclosed flow on generalized Kähler manifolds with split tangent bundle." Journal für die reine und angewandte Mathematik (Crelles Journal) 2018, no. 739 (2018): 241–76. http://dx.doi.org/10.1515/crelle-2015-0055.

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Abstract We show that the pluriclosed flow preserves generalized Kähler structures with the extra condition [J_{+},J_{-}]=0 , a condition referred to as “split tangent bundle.” Moreover, we show that in this case the flow reduces to a nonconvex fully nonlinear parabolic flow of a scalar potential function. We prove a number of a priori estimates for this equation, including a general estimate in dimension n=2 of Evans–Krylov type requiring a new argument due to the nonconvexity of the equation. The main result is a long-time existence theorem for the flow in dimension n=2 , covering most cases

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Dissertations / Theses on the topic "Estimateurs de tangente"

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Vieilleville, François de. "Analyse des parties linéaires des objets discrets et estimateurs de caractéristiques géométriques." Bordeaux 1, 2007. http://www.theses.fr/2007BOR13405.

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Cette thèse s'inscrit dans le cadre de la géométrie discrète et étudie plus particulièrement le comportement des parties linéaires sur les discrétisés de formes euclidiennes en dimension deux. Pour analyser précisément ce comportement nous utiliserons de façon complémentaire l'approche issue de la géométrie arithmétique et une description combinatoire des mots de Christoffel basée sur les fractions continues. Nous montrerons ainsi de nombreux liens entre la convexité (des formes euclidiennes et des formes discrètes) et une classe de parties linéaires : les segments maximaux. Sur un polygone co

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Postolski, Michal. "Discrete topology and geometry algorithms for quantitative human airway trees analysis based on computed tomography images." Phd thesis, Université Paris-Est, 2013. http://pastel.archives-ouvertes.fr/pastel-00977514.

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Computed tomography is a very useful technic which allow non-invasive diagnosis in many applications for example is used with success in industry and medicine. However, manual analysis of the interesting structures can be tedious and extremely time consuming, or even impossible due its complexity. Therefore in this thesis we study and develop discrete geometry and topology algorithms suitable for use in many practical applications, especially, in the problem of automatic quantitative analysis of the human airway trees based on computed tomography images. In the first part, we define basic noti

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Book chapters on the topic "Estimateurs de tangente"

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Bismut, Jean-Michel. "The displacement function and the return map." In Hypoelliptic Laplacian and Orbital Integrals (AM-177). Princeton University Press, 2011. http://dx.doi.org/10.23943/princeton/9780691151298.003.0004.

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This chapter studies the displacement function dᵧ on X that is associated with a semisimple element γ‎ ∈ G. If φ‎″, t ∈ R denotes the geodesic flow on the total space X of the tangent bundle of X, the critical set X(γ‎) ⊂ X of dᵧ can be easily related to the fixed point set Fᵧ ⊂ X of the symplectic transformation γ‎⁻¹φ‎₁ of X. The chapter studies the nondegeneracy of γ‎⁻¹φ‎₁ − 1 along Fᵧ. More fundamentally, this chapter gives important quantitative estimates on how much φ‎ <sub>½</sub> differs from φ‎ <sub>˗½γ‎</sub> away from Fᵧ. These quantitative estimates are based on Toponogov's theorem.

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Gelfert, Katrin. "Hausdorff dimension estimates by use of adapted Carathéodory outer measures and application to invariant sets with an equivariant tangent bundle splitting." In Equadiff 99. World Scientific Publishing Company, 2000. http://dx.doi.org/10.1142/9789812792617_0132.

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Conference papers on the topic "Estimateurs de tangente"

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Izadi, Maziar, Jan Bohn, Daero Lee, Amit K. Sanyal, Eric Butcher, and Daniel J. Scheeres. "A Nonlinear Observer Design for a Rigid Body in the Proximity of a Spherical Asteroid." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-4085.

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We consider an observer design for a spacecraft modeled as a rigid body in the proximity of an asteroid. The nonlinear observer is constructed on the nonlinear state space of motion of a rigid body, which is the tangent bundle of the Lie group of rigid body motions in three-dimensional Euclidean space. The framework of geometric mechanics is used for the observer design. States of motion of the spacecraft are estimated based on state measurements. In addition, the observer designed can also estimate the gravity parameter of the asteroid, assuming the asteroid to have a spherically symmetric ma

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Fallahi, Behrooz, Arjun Kumar Perla, and Kyle Corn. "Computation of Common Normal Between Wheel and Rail Surface via Linearized Track." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-65608.

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Computation of contact points between the wheel and rail is a fundamental problem in dynamic simulation of trains. To compute these contact points, one needs to locate common normals first. The objective of this study is to develop an efficient method to compute common normals between wheel and rail surface. This is done by devising a method to compute an estimate of location of common normals and then using them as the initial guess to compute them. To generate an estimate of the location of common normal, a local approximation of the rail is constructed. To achieve this, the intersection of

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