نتایج جستجو برای: diluted

تعداد نتایج: 12351  

Journal: :Journal of Magnetism and Magnetic Materials 1998

Journal: :Geothermal Energy 2022

Abstract “Blue energy” could be produced by exploiting the large salinity gradient between geothermal fluids and freshwater through a SaltPower system. This study is an attempt to select most favorable chemicals avoid injectivity issues when diluted fluid resulting from system returned reservoir. Three synthetic chelating agents (oxalic acid, EDTA, EDDS) one natural (humic acid) were evaluated ...

Journal: :Physical review 2021

Efficient feature selection from high-dimensional datasets is a very important challenge in many data-driven fields of science and engineering. We introduce statistical mechanics inspired strategy that addresses the problem sparse context binary classification by leveraging computational scheme known as expectation propagation (EP). The algorithm used order to train continuous-weights perceptro...

Journal: :Physical review letters 2002
A Kaminski S Das Sarma

We theoretically study the development of spontaneous magnetization in diluted magnetic semiconductors as arising from a percolation of bound magnetic polarons. Within the framework of a generalized percolation theory we derive analytic expressions for the Curie temperature and the magnetization in the limit of low carrier density, obtaining excellent quantitative agreement with Monte Carlo sim...

1998
D. Rodic Jonathan R. Friedman

The magnetic susceptibility of the diluted magnetic Lu22xGdxO3 ~x50.06, 0.10, 0.22, 0.40, 1.00, 1.40, 1.80! was measured in the temperature range 1.7–295 K. The inverse susceptibility changes slope to a smaller value below 2.2 K for the samples with x<0.40. In the cubic Lu0.20Gd1.80O3 the slope increases below 2.8 K. These changes are attributed to the large difference in susceptibility for two...

2003
Carsten Timm

In recent years, disorder has been shown to be crucial for the understanding of diluted magnetic semiconductors. Effects of disorder in these materials are reviewed with the emphasis on theoretical works. The types and spatial distribution of defects are discussed. The effect of disorder on the intimately related transport and magnetic properties are considered from the viewpoint of both the ba...

2014
Salvatore Chirumbolo

Two recently published papers reported that water/ethanol dilutions of Gelsemium sempervirens Ait. extracts could modify gene expression on in vitro human neuronal cells (Marzotto et al., 2014; Olioso et al., 2014). Both papers were performed with the purpose to demonstrate cellular activity of G. sempervirens dilutions, on suited standardized cultures, and confirm the behavioral evidence previ...

2002
Ying Wang Thomas Bein

We report the first example of a dilute magnetic semiconductor (DMS) confined in all three dimensions (DMS quantum dot). Zn0.93Mn0.07S clusters o f 2 5 A diameter are successfully synthesized inside a glass matrix and fully characterized by chemical analysis, x-ray diffraction, extended x-ray absorption fine structure (EXAFS), and photoluminescence spectroscopy. Effect of size quantization on t...

1994
Peter Kuhlmann

A linearly separable Boolean function is learned by a diluted perceptron with optimal stability. A diierent level of dilution is allowed for teacher and student perceptron. The learning algorithms used were the optimal annealed dilution and Hebbian dilution. The generalisation ability, i.e. the probability to recognize a pattern which has not been learned before, is calculated in replica symmetry.

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