搜索结果: 1-15 共查到“gradient”相关记录45条 . 查询时间(0.074 秒)
Vectorising Bitmaps into Semi-Transparent Gradient Layers
Semi-Transparent Gradient Layers Vectorising Bitmaps
2016/5/24
We present an interactive approach for decompositing bitmap drawings and studio photographs into opaque and
semi-transparent vector layers. Semi-transparent layers are especially challenging to extra...
The Socioeconomic Gradient of Child Development:Cross-Sectional Evidence from Children 6–42 Months in Bogota
Socioeconomic Gradient Child Development Children 6–42 Months Bogota
2016/3/3
We study the socioeconomic gradient of child development on a sample of low- and middle-income children aged 6–42 months in Bogota using the Bayley Scales of Infant and Toddler Development. We find an...
Boundary Harnack principle and gradient estimates for fractional Laplacian perturbed by non-local operators
Harmonic function boundary Harnack principle gradient estimate non-local operator Green function Poisson kernel
2016/1/26
Boundary Harnack principle and gradient estimates for fractional Laplacian perturbed by non-local operators.
Quantum Estimation of Magnetic-field Gradient Using W-state
Quantum metrology Magnetic-field gradient W-state Cold atoms
2016/1/22
We study the precision limits of detecting a linear magnetic-field gradient by using W-states in the presence of different types of noises. We consider to use an atomic spin chain for probing the magn...
Optimal scaling of a gradient method for distributed resource allocation
Distributed optimization resource allocations weighted gradient methods convergence rates semidefinite programming
2015/8/10
We consider a class of weighted gradient methods for distributed resource allocation over a network. Each node of the network is associated with a local variable and a convex cost function; the sum of...
Chromosome Segmentation and Investigations using Generalized Gradient Vector Flow Active Contours
Generalized Gradient Vector Flow Active Contours Deformable Curves Chromosome Boundary Mapping Characterization
2015/7/30
We investigated Generalized Gradient Vector Flow Active Contours as a suitable boundary mapping technique for Chromosome spread images which have variability in shape and size, expecting to yield a ro...
Monotonicity and Restart in Fast Gradient Methods
Monotonicity Restart Fast Gradient Methods
2015/7/9
Fast gradient methods are known to be non-monotone algorithms, and oscillations typically occur around the solution. To avoid this behavior, we propose in this paper a fast gradient method with restar...
First order optimization methods often perform poorly on ill-conditioned optimization problems. However, by preconditioning the problem data and solving the preconditioned problem, the performance of ...
Likelihood Ratio Gradient Estimation for Stochastic Recursions
Likelihood Ratio Gradient Estimation Stochastic Recursions
2015/7/8
In this paper, we develop mathematical machinery for verifying that a broad class of general state space Markov chains reacts smoothly to certain types of perturbations in the underlying transition st...
A Gradient in Education Due to Health? Evidence from the Study of Health Behavior in School-Aged Children
Health achievement adolescents
2015/7/3
Research exploring the relationship between education and health suggests that people with
higher levels of schooling report better health. To emphasize health as a determinant of
educational achi...
Reduction of the Adjoint Gradient Formula in the Continuous Limit
Adjoint Gradient Formula Continuous Limit
2015/7/2
We present a new continuous adjoint method for Aerodynamic Shape Optimization (ASO) using the Euler equations, which reduces the computational cost of the gradi ents by reducing the volume integral pa...
Analysis of Ionosphere Gradient Using Japan GEONET Data
Ionosphere Gradient Japan GEONET Data
2015/6/26
Large spatial gradients in ionosphere delay are a potentially threatening error source for the Local Area Augmentation System (LAAS). Therefore a better understanding of the ionosphere behavior during...
In complex problems it may, however, be very expensive or infeasible to determine the Hessian matrix A.
This motivates quasi-Newton methods which recursively estimate A of A−1
from the measure...
OCCLUSION DETECTION BY HEIGHT GRADIENT FOR TRUE ORTHOPHOTO GENERATION, USING LIDAR DATA
True Orthophoto Occlusion Detection LiDAR Height Gradient Double Mapping DSM
2014/4/24
Nowadays, the use of orthophoto in urban areas has become common. It is known that in most parts of urban areas there are a great number of tall buildings which can cause occlusion regions during imag...
Adaptivity of averaged stochastic gradient descent to local strong convexity for logistic regression
Adaptivity averaged stochastic gradient descent local strong convexity logistic regression
2013/4/28
In this paper, we consider supervised learning problems such as logistic regression and study the stochastic gradient method with averaging, in the usual stochastic approximation setting where observa...