Results 21 to 30 of about 41,599 (114)

Notes on a PDE System for Biological Network Formation [PDF]

open access: yes, 2015
We present new analytical and numerical results for the elliptic-parabolic system of partial differential equations proposed by Hu and Cai, which models the formation of biological transport networks.
Haskovec, Jan   +3 more
core   +4 more sources

APPLICATION OF A PRIMAL-DUAL INTERIOR POINT ALGORITHM USING EXACT SECOND ORDER INFORMATION WITH A NOVEL NON-MONOTONE LINE SEARCH METHOD TO GENERALLY CONSTRAINED MINIMAX OPTIMISATION PROBLEMS [PDF]

open access: yesJournal of Engineering Science and Technology, 2008
This work presents the application of a primal-dual interior point method to minimax optimisation problems. The algorithm differs significantly from previous approaches as it involves a novel non-monotone line search procedure, which is based on the use ...
INTAN S. AHMAD, VASSILIOS S. VASSILIDIS
doaj  

Sparsity Apprised Logarithmic Hyperbolic Tan Adaptive Filters for Nonlinear System Identification and Acoustic Feedback Cancellation

open access: yesIEEE Open Journal of Signal Processing
Recently, various robust algorithms based on hyperbolic cosine and sine functions, such as hyperbolic cosine (HCAF), exponential hyperbolic cosine, joint logarithmic hyperbolic cosine adaptive filter, etc., have been predominantly employed for different ...
Neetu Chikyal   +4 more
doaj   +1 more source

Summation test for gap penalties and strong law of the local alignment score

open access: yes, 2005
A summation test is proposed to determine admissible types of gap penalties for logarithmic growth of the local alignment score. We also define a converging sequence of log moment generating functions that provide the constants associated with the large ...
Chan, Hock Peng
core   +1 more source

Seismic Inversion Method Based on Logarithmic Three-dimensional Total Variation Sparse Constraint under Mixed-domain Constraints

open access: yesCT Lilun yu yingyong yanjiu
The sparse impedance inversion method is widely used in oil and gas exploration. However, traditional sparse constraints capture limited three-dimensional spatial sparse information and often neglect the time-frequency characteristics of seismic data. As
Bo HOU   +4 more
doaj   +1 more source

Linearly Solvable Stochastic Control Lyapunov Functions [PDF]

open access: yes, 2016
This paper presents a new method for synthesizing stochastic control Lyapunov functions for a class of nonlinear stochastic control systems. The technique relies on a transformation of the classical nonlinear Hamilton-Jacobi-Bellman partial differential ...
Burdick, Joel W.   +2 more
core   +3 more sources

An Efficient Penalty Method without a Line Search for Nonlinear Optimization

open access: yesAxioms
In this work, we integrate some new approximate functions using the logarithmic penalty method to solve nonlinear optimization problems. Firstly, we determine the direction by Newton’s method.
Assma Leulmi
doaj   +1 more source

A soothing invisible hand: moderation potentials in optimal control [PDF]

open access: yes, 2013
A moderation incentive is a continuously differentiable control-dependent cost term that is identically zero on the boundary of the admissible control region, and is subtracted from the `do or die' cost function to reward sub-maximal control utilization ...
Lewis, Debra
core  

Optimal Navigation Functions for Nonlinear Stochastic Systems

open access: yes, 2014
This paper presents a new methodology to craft navigation functions for nonlinear systems with stochastic uncertainty. The method relies on the transformation of the Hamilton-Jacobi-Bellman (HJB) equation into a linear partial differential equation. This
Burdick, Joel W., Horowitz, Matanya B.
core   +1 more source

Iterative Estimation of Solutions to Noisy Nonlinear Operator Equations in Nonparametric Instrumental Regression

open access: yes, 2013
This paper discusses the solution of nonlinear integral equations with noisy integral kernels as they appear in nonparametric instrumental regression. We propose a regularized Newton-type iteration and establish convergence and convergence rate results ...
Dunker, Fabian   +4 more
core   +2 more sources

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