نتایج جستجو برای: absolute value equation levenberg marquardt approach conjugate subgradient

تعداد نتایج: 2197530  

Journal: :American Journal of Industrial and Business Management 2014

2016
CHAO MA XIN LIU ZAIWEN WEN

In this paper, we consider a nonlinear least squares model for the phase retrieval problem. Since the Hessian matrix may not be positive definite and the Gauss-Newton (GN) matrix is singular at any optimal solution, we propose a modified Levenberg-Marquardt (LM) method, where the Hessian is substituted by a summation of the GN matrix and a regularization term. Similar to the well-known Wirtinge...

Journal: :IEEE transactions on image processing : a publication of the IEEE Signal Processing Society 2003
Mathias Pingault Eric Bruno Denis Pellerin

Motion transparency phenomena in image sequences are frequent, but classical methods of motion estimation are unable to deal with them. This paper describes a method for estimating optical flow by a generalization of the brightness constancy assumption to additive transparencies. The brightness constancy assumption is obtained by setting constant velocity fields during three images of a sequenc...

Introduction: Obesity and hypertension are community health problems. The objective of this study was to diagnose obesity and hypertension in Isfahani students by artificial neural network. Method: The present study was a diagnostic and predictive one that used the information of 460 students aged 7-18 years old in Isfahan to design a neural network with 11 input variables (age, sex, weight, he...

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