Although evident progress and considerable achievements have been attained in developing a new particle swarm optimization (PSO) algorithm, successfully balancing the exploration and exploitation capabilities of PSO to determine high-quality solutions for complex optimization problems remains a fundamental challenge. In this study, we propose a new PSO variant, namely, adaptive division of labo...

We revisit an algorithm (called Edge Pushing (EP)) for computing Hessians using Automatic Differentiation (AD) recently proposed by Gower and Mello (2012). Here we give a new, simpler derivation for the EP algorithm based on the notion of live variables from data-flow analysis in compiler theory and redesign the algorithm with close attention to general applicability and performance. We call th...

Lie derivatives are widely used in mathematics and physics. They are usually computed symbolically using computer algebra software. This symbolic computation might fail for very complicated expressions. Moreover, symbolic differentiation becomes more difficult if the function to be differentiated is not described explicitly as a function but by an algorithm. This is a situation occuring quite o...

The genome of nearly all chickens contains various DNA proviral insertions of retroviruses of subgroup E avian leukosis virus (ALVE). However, the elimination or control of ALVE gene expression is desirable to improve productivity, to improve resistance to avian leukosis virus (ALV)-induced tumours, and to develop safer live virus vaccines in chick embryos and cultured chick cells. Restriction ...

OBJECTIVE Determine if adolescent immunization rates can be improved by contacting the parents or by contacting both the parents and adolescents. METHODS Thirteen- to 17-year-olds overdue for at least 1 of 3 immunizations were randomized to (1) a control arm (Control), (2) telephone calls to the parent/guardian (Parent Only), or (3) telephone calls to the parent/guardian and the adolescent (P...

In Experiment 1, chickens from various white leghorn experimental lines were inoculated with strain ADOL-Hcl of subgroup J avian leukosis virus (ALV-J) either as embryos or at 1 day of age. At various ages, chickens were tested for ALV-J induced viremia, antibody, and packed cell volume (PCV). Also, at 4 and 10 wk of age, bursal tissues were examined for avian leukosis virus (ALV)-induced prene...

This paper shows how rst-order derivatives can be computed in parallel by considering the computational graph that underlies the evaluation of the target function. The graph can be generated eeciently from the ADOL-C computational trace and can be used to automatically deduce the structure of the Jacobian matrix and compute the Jacobian using the reverse mode of automatic diierentiation. By emp...

This paper shows how rst-order derivatives can be computed in parallel by considering the computational graph that underlies the evaluation of the target function. The graph can be generated eeciently from the ADOL-C computational trace and can be used to automatically deduce the structure of the Jacobian matrix and compute the Jacobian using the reverse mode of automatic diierentiation. By emp...

This paper presents a minimization method for Lipschitz continuous, piecewise smooth objective functions based on algorithmic differentiation (AD). We assume that all nondifferentiabilities are caused by abs(), min(), and max(). The optimization method generates successively piecewise linearizations in abs-normal form and solves these local subproblems by exploiting the resulting kink structure...