Classical iterative methods for the solution of algebraic linear systems of equations proceed by solving at each step a simpler system of equations. When this system is itself solved by an (inner) iterative method, the global method is called a two-stage iterative method. If this process is repeated, then the resulting method is called a nested iterative method. We study the convergence of such...

background: gasoline station workers are exposed to volatile organic compounds such as benzene, toluene, ethylbenzene and xylene (btex). objectives: to determine the level of exposure to btex compounds among gasoline station workers and measure the roadside concentrations of these compounds in the inner and outer areas of bangkok, thailand. methods: 49 workers at 6 gasoline stations in the inne...

The fine structure of reconstructed neural retina formed from dissociated neural retinal cells of 6^-day-oId chick embryos on the chorio-allantoic membrane of chick embryos was examined with the electron microscope. Three nuclear layers (ganglion cell Jayer, inner and outer nuclear layers) and two fibrous layers (inner and outer plexiform layers) are found within the reconstructed retina. Both ...

This paper deals with the computation of largest robust control invariant sets (RCISs) constrained nonlinear systems. The proposed approach is based on casting search for set as a graph theoretical problem. Specifically, general class discrete-time time-invariant systems considered. First, dynamics system approximated directed graph. Subsequently, condition invariance derived and an algorithm c...

Abstract In this study, a dynamic model for the bearing rotor system of high-speed train under variable speed conditions is established. contrast to previous studies, contact stress simplified in proposed and compensation balance excitation caused by mass eccentricity considered. The angle iteration method used overcome challenge posed inability determine roller space position during rotation. ...

The retina is a many layered structure and retinal dystrophies may affect any of the layers. From the vitreous to the choroid these are the internal limiting membrane, nerve fibre layer, ganglion cell layer, inner plexiform layer, inner nuclear layer, outer plexiform layer, outer nuclear layer, external limiting membrane, rod and cone inner and outer segments and the retinal pigment epithelium ...

In the present study procedures for the solution of large-scale nonlinear algebraic discrete equations arising from the application of the finite element method to structural analysis problems are described and evaluated. The methods are based on Newton’s method for the outer iterations, while for the linearized problem in each iteration the preconditioned conjugate gradient (03) method is empl...

This paper investigates the joint source-channel coding problem of sending a memoryless source over a memoryless broadcast channel. An inner bound and several outer bounds on the achievable distortion region are derived, which respectively generalize and unify several existing bounds. As a consequence, we also obtain an inner bound and an outer bound for degraded broadcast channel case. When sp...

The egg shell of Huffmanela huffmani Moravec, 1987 forms three main layers: an outer vitelline layer, a middle chitinous layer, and an inner lipid layer. The vitelline layer, forming the superficial projections of the egg shell, comprises two parts: an outer electron-dense, and an inner electron-lucid part. The chitinous layer is differentiated into three parts: an outer homogenous electron-den...