Information processing using dynamical chaos: neural networksimplementation

In this work, we study information processing applications of complex dynamics and chaos in neural networks. We discuss mathematical models based on piecewise-linear maps which enable us to realize the basic functions of information processing using complex dynamics and chaos. Realizations of these models using recurrent neural-like systems are presented.     

Formation and decay of neutron—deficient nuclei Po and Pb

ＦｏｒｍａｔｉｏｎａｎｄｄｅｃａｙｏｆｎｅｕｔｒｏｎｄｅｆｉｃｉｅｎｔｎｕｃｌｅｉＰｏａｎｄＰｂＣｈｅｎＸｕｅＳｈｉ１，２，ＡｈｍａｄＩ３，ＡｎｄｒｅｙｅｖＡＮ４，ＢａｔｃｈｅｌｄｅｒＪＣ７，ＢｉｊｎｅｎｓＮ４，ＢｉｎｇｈａｍＣＲ２，５，Ｂｌｕｍ...     

Production of dielectric and semiconducting diamond-like films

The paper deals with the results of diamond-film production when a hydrocarbon-containing gas mixture is excited by a glow discharge. The Raman spectra and electrical conductivity of films deposited under various conditions have been studied. The specific resistance of the films varied from 10^-2 to 10⁸ ω cm depending on the test conditions.     

Synthesis of nanocrystalline nitrogen-rich carbon nitride powders at high pressure

Nitrogen-rich carbon nitride powders with composition close to C₄N_2.8–3.3 were synthesized by using a chemical reaction between sodium azide and hexachlorobenzene under high pressure (7.7 GPa) and a temperature of 500 °C for 30 min. The final black powders were relatively hard materials with high resistance to hot acids and common organic solvents. Analytical electron microscopy and X-ray diffraction studies showed that the powders are predominantly amorphous, containing nanometer-sized crystallites. Carbon and nitrogen K-edge structures obtained by electron energy-loss spectroscopy suggest the existence of chemical bonding between C and N, and that the amorphous carbon nitride matrix is primarily sp²-bonded. Raman and infrared features of the carbon nitride powders closely resemble those in carbon and diamond-like films and also characterize the powders as strongly disordered, sp²-bonded carbon nitride exhibiting graphite-like microdomains with dimensions of approximately 1 nm.     

Production and mechanical properties of high-entropic carbide based on the TiZrHfVNbTa multicomponent alloy

The possibility of producing coatings of high entropic carbide by scattering multicomponent alloy in plasma of compressed vacuum–arc discharge has been shown. It is defined that the hardness of coatings from high-entropic carbide based on TiZrHfVNbTa multicomponent alloy is 43–48 GPa and exceeds the hardness of monocarbides of metals that enter into the composition of the alloy. The friction coefficient for the carbide high-entropic coating based on the TiZrHfVNbTa alloy at the loads 2.2 to 5.2 N is 0.14–0.16.     

Fabrication of perforated sub-micron silica shells

A new synthetic approach for fabrication of perforated hollow silica morphologies using colloidal template assemblies is demonstrated. As proof-of-principle, the polystyrene/silver colloidal assemblies had chemically modified surfaces. The template dissolution resulted in the fabrication of the submicron perforated hollow silica shells. The morphologies are characterized by transmission electron microscopy, energy dispersive spectroscopy and plasmon light extinction spectrophotometry.     

Effect of modified surface structure of impregnated polypropylene film on capacitor dielectric properties during thermal ageing

Contents The results of ageing tests of biaxialy oriented impregnated capacitor polypropylene films with modified and unmodified surface structure are presented in this paper. The temperature dependence of factorD=tan ₀ (where tan ₁ and tan ₀ relate to impregnating fluid aged with and without polypropylene film, respectively), the relationship between factorD and the aromatic content of impregnating fluid and time dependence of dielectric strength for both types of film are presented. The possible destroying mechanism of the capacitor dielectric system is given.

---

Die Auswirkung modifizierter Strukturen imprägnierten Polypropylen-Films auf die dielektrischen Eigenschaften eines Kondensators bei thermischer Alterung

Übersicht Der Aufsatz stellt die Ergebnisse von Alterungsprüfungen an imprägnierten Polypropylen-Folien für Kondensatoren vor. Es werden die Temperaturabhängigkeit des QuotientenD der tan -Werte mit und ohne Polypropylen-Film bezogen auf die Alterung des Imprägniermittels, die Beziehung des FaktorsD mit dem Aromatenanteil des Imprägniermittels und die Zeitabhängigkeit der dielektrischen Festigkeit für die beiden Arten des Films behandelt. Der mögliche Mechanismus der Zerstörung des dielektrischen Systems des Kodensators wird angegeben.

     

Analysis of stabilization quality false alarm probability by a radar adaptive detector in order statistics

New expressions are derived for estimating the false alarm probability by adaptive threshold detectors, using the method of averaging and method of order statistics, in the presence of nonstationary interference. Potentialities of these devices, from the viewpoint of their stabilization of false alarm probability in the presence of nonstationary interference, are defined, and comparative analysis of the devices is performed. Original Russian Text ? F. M. Andreyev, I. V. Taranchenko, 2007, published in Izvestiya VUZ. Radioelektronika, 2007, Vol. 50, No. 4, pp. 3–11.     

PD tests to measure the electrical treeing resistance of cableinsulation and erosion rate resistance of capacitor metalized films

The development of engineering PD tests to measure the resistance to destruction of power cables and capacitor dielectrics leads to improved dielectric design and more reliable equipment