搜索结果: 1-15 共查到“管理学 shape”相关记录17条 . 查询时间(0.25 秒)
Adaptive confidence intervals for regression functions under shape constraints
Adaptation confidence interval convex function coverage probability expected length minimax estimation modulus of continuity monotone func-tion nonparametric regression shape constraint white noise model
2013/6/14
Adaptive confidence intervals for regression functions are constructed under shape constraints of monotonicity and convexity. A natural benchmark is established for the minimum expected length of conf...
Iterative graph cuts for image segmentation with a nonlinear statistical shape prior
Image segmentation MM graph cuts energy minimization statistical shape prior kernel density estimation
2012/9/18
Shape-based regularization has proven to be a useful method for delineating objects from the noisy im-ages encountered in many applications when one has prior
knowledge of the shape of the targeted o...
Multiscale Methods for Shape Constraints in Deconvolution
Brownian motion convexity di erential inequalities ill-posed problems
2011/7/19
We derive multiscale statistics for deconvolution in order to detect qualitative features of the unknown density. An important example covered within this framework is to test for local monotonicity o...
The Shape of the Noncentral Chi-square Density
distribution theory log-concavity log-convexity noncentral distribution
2011/7/6
A noncentral chi-square density is log-concave if the degree of freedom is nu>=2. We complement this known result by showing that, for each 0here exists lambda_nu>0 such that the chi-square wi...
Recovering the shape of a point cloud in the plane
Convex set a-convex set Set estimation Distance in measure Image analysis
2011/6/20
In this work we deal with the problem of support estimation under shape restrictions. The shape
restriction we deal with is an extension of the notion of convexity named a-convexity. Instead of
assu...
Efficient estimation for a subclass of shape invariant models
Shape invariant model semiparametric estimation efficiency
2010/10/15
In this paper, we observe a fixed number of unknown $2\pi$-periodic functions differing from each other by both phases and amplitude. This semiparametric model appears in literature under the name "s...
Dynamic shape analysis and comparison of leaf growth
geodesics parallel–transport Riemannian im–/submersion shape analysis forest biometry leaf growth
2010/3/10
In the statistical analysis of shape a goal beyond the analysis of static
shapes lies in the quantification of ‘same’ deformation of different shapes.
Typically, shape spaces are modelled as Riemann...
Inference based on Procrustes means for the 3D shape of tree boles and mildly rank-deficient diffusion tensors
Shape Spaces Extrinsic Mean Mean Location GeneralProcrustes Analysis Weighted Procrustes Mean Strong Law of Large Numbers
2010/3/10
A method for inference on cylindricity of tree boles based on 3D
Kendall shapes is presented. This method employs Procrustes means
which are highly popular in the shape community. While for extrinsi...
On the meaning of mean shape
Shape Spaces Intrinsic Mean Extrinsic Mean MeanLocation Stability General Procrustes Analysis
2010/3/10
A stability result for intrinsic means on the quotient due to an isomet-
ric and proper Lie group action on a Riemannian manifold is derived, stat-
ing that intrinsic means are contained in the high...
Bayesian Inference for Shape Mixtures of Skewed Distributions, with Application to Regression Analysis
Posterior analysis regression model shape parameter skewness symmetry
2009/9/22
We introduce a class of shape mixtures of skewed distributions and
study some of its main properties. We discuss a Bayesian interpretation and some
invariance results of the proposed class. We devel...
Optimal Conditional Confidence Interval for the Shape Parameter of a Weibull Distribution
Optimal Conditional Confidence Interval the Shape Parameter a Weibull Distribution
2009/9/17
Optimal Conditional Confidence Interval for the Shape Parameter of a Weibull Distribution。
Size-and-Shape Cone, Shape Disk and Configuration Densities for the Elliptical Models
Size-and-Shape Cone Shape Disk Configuration Densities the Elliptical Models
2009/9/17
Size-and-Shape Cone, Shape Disk and Configuration Densities for the Elliptical Models。
To shape practice act on theories
communities of practice situated learning cognition knowledge management organizational learning theory of action
2009/7/17
Practice based studies have provided rich descriptions of knowledge dynamics. On the other hand, they led to conceptualizations that question the possibility to view knowledge as a resource that can b...
Shape and local growth for multidimensional branching random walks in random environment
Shape theorem subadditive ergodic theorem transience growth ex-ponent population size
2009/6/12
We study branching random walks in random environment on the d-dimensional square lattice, d 1. In this model, the environment has nite range dependence, and the population size cannot decrease. We pr...
LIFETIME MODELS WITH NONCONSTANT SHAPE PARAMETERS
accelerated life tests bootstrap long-term survivors nonconstant shape parameter Weibull distribution
2009/2/26
In its standard form, a lifetime regression model usually assumes that the time until an
event occurs has a constant shape parameter and a scale parameter that is a function of
covariates. In this p...