This paper presents a maximum-likelihood solution to the general problem of tting a parametric model to observations from a single realization of a 2-D homogeneous random eld with mixed spectral distribution. On the basis of a 2-D Wold-like decomposition, the eld is represented as a sum of mutually orthogonal components of three types: purelyindeterministic, harmonic, and evanescent. The sugges...

A practical two-stage procedure for determination of stand parameters of entire forest stands by means of fi eld plots and airborne laser scanner data has been developed and tested. In the fi rst stage, geo-referenced fi eld sample plots are related to the corresponding laser data, and relationships (regressions) between fi eld data and various canopy height and canopy density metrics that can ...

In this paper, we propose a method for estimation of camera lens distortion correction from a single image. Without relying on image EXIF, the method estimates the parameters of the correction by searching for a maximum energy of the so-called linear pattern introduced into the image during image acquisition prior to lens distortion correction. Potential applications of this technology include ...

Population structure determines sugarcane yield, of which canopy structure is a key component. To fully understand the relations between sugarcane yield and parameters of the canopy structure, 17 sugarcane varieties were investigated at five growth stages. The results indicated that there were significant differences between characterized parameters among sugarcane populations at different grow...

Oxide thin ®lms have been studied for frequency and phase agile electronics. The electric-®eld tuning of microwave devices employs ferroelectrics, while the Magnetic-®eld tuning uses ferrites. The critical material parameters for ferroelectric thin ®lms are the tunability of the dielectric constant and the dielectric loss. This paper describes the current understanding of the fundamental mechan...

Exact inference in large, densely connected probabilistic networks is computa-tionally intractable, and approximate schemes are therefore of great importance. One approach is to use mean eld theory, in which the exact log-likelihood is bounded from below using a simpler approximating distribution. In the standard mean eld theory, the approximating distribution is factorial. We propose instead t...

Problems Daniel Ioan, Irina Munteanu (IEEE members) and Cristian-George Constantin "POLITEHNICA" University of Bucharest, Numerical Methods Laboratory Electrical Engineering Dept. Spl. Independentei 313, 77206 Bucharest, Romania Abstract| The paper presents a new e cient technique to solve electromagnetic eld problems coupled with electric or electronic circuits. It is based on a post-processin...

twenty five blood samples from 6-month to 5-year old children with visceral leishmaniasis were analysed for various enzymes. aspartate transaminase (ast), alanine transaminase (alt), lactate dehydrogenase (ld) and its various isoenzymes were estimated in the serum, while glucose 6-phosphate dehydrogenase (g6pd) was measured in red blood cells. for comparison, blood samples from healthy children...

Background: Mobile phones, use electromagnetic radiation in the microwave range. On the other hand, there is only one report on radioprotective effects of flaxseed oil. The aim of this study was to investigate the effect of irradiation of rats with microwaves and/or treatment with flaxseed oil on the induction of adaptive response to a subsequent lethal dose (LD) of gamma rays. Materia...

background:  in this study a series of basic dosimetric properties of a low-density (ld) gel dosimeter are investigated. the dose response is studied regarding to linearity, sensitivity, dose-rate and energy dependence as well as lung tissue equivalence. materials and methods: the ld gel was made by mixing the polymer gel with expanded polystyrene spheres. energy dependence was studied at two d...