A hybrid method combining the FR conjugate gradient method and the WYL conjugate gradient method is proposed for unconstrained optimization problems. The presented method possesses the sufficient descent property under the strong Wolfe-Powell SWP line search rule relaxing the parameter σ < 1. Under the suitable conditions, the global convergence with the SWP line search rule and the weak Wolfe-...

Visual obstruction as a method to quantify herbaceous biomass in southern African semi-arid savannas Dave Joubert, Larkin A Powell & Walter H Schacht To cite this article: Dave Joubert, Larkin A Powell & Walter H Schacht (2015) Visual obstruction as a method to quantify herbaceous biomass in southern African semi-arid savannas, African Journal of Range & Forage Science, 32:3, 225-230, DOI: 10.2...

There is a bewildering array of methods for estimating animal home ranges, including minimum convex polygons, bivariate ellipses, adaptive and fixed kernels, and even a Brownian bridge technique (Bullard 1991; Kernohan et al. 2001). Many people believe that the fixed kernel method using least-squares cross validation (LSCV) is the best approach currently available (Seaman and Powell 1996; Powel...

for calculation of the displacements of points in micro geodesy networks, it is essential to discover stable and unstable points. without knowing stable points, calculated displacements are due to datum deficiency. in this case, calculated displacements are not valid. there are two methods to discover stable and unstable points: a-congruency robust method b- l1 norm minimization in this study t...

In this paper, Hybridization of Cuckoo Search algorithm with Powell Search (HCSPS) is used to solve optimal reactive power problem. Cuckoo search (CS) has been recently projected as a population-based optimization algorithm and it is has so far been efficaciously applied in a variety of fields. The inertia weight of Levy flights is presented to balance the capability of global and local search....

Approximately 1 in 6 children in the United States are diagnosed with one or more developmental disabilities or delays (Boyle et al., 2011). Although the number of therapeutic approaches for children with developmental disabilities has increased, no single treatment or combination of treatments is effective in relieving symptoms for all individuals (Scharoun, Reinders, Bryden & Fletcher, 2014)....

Studies on the response of the blackfly Simulium ornatum s.l (Diptera Simuliidae) to carbon dioxide (CO2), acetone, 1-octen-3-ol and air was conducted in the laboratory using a Y-tube olfactometer. The blackflies were found to exhibit a high degree of activity in the olfactometer and responded to the various odours. The results showed that CO2 and l-octen-3-ol were attractive to the flies at lo...

This chapter describes the development and testing of a method for information systems (IS) strategy formulation in small and medium enterprises (SMEs). A case study describing a practical experience with the method is presented. Essentially the method is comprised of two complementary analyses: an externally focused strategic analysis and an internally focused business process analysis. The me...