Calculation of mutual information for nonlinear optical fiber communication channel at large SNR within path-integral formalism

Using the path-integral technique we calculate the mutual information for the fiber optical channel modelled by the nonlinear Schrö dinger equation with additive Gaussian noise. At large signal-to-noise ratio (SNR) we present the mutual information through the path-integral which is convenient for the perturbative expansion both in nonlinearity and dispersion. In the leading order in 1/SNR we demonstrate that the mutual information is determined through the averaged logarithm of the normalization factor Λ of the conditional probability density function P[Y|X]. In the limit of small noise and small nonlinearity we derive analytically the first nonzero nonlinear correction to the mutual information for the channel. For the arbitrary nonlinearity we restrict the mutual information by the low bound obtained from the Jensen's inequality and analyze the bound for the case of large dispersion

The research of abnormal toxicity and local irritant effect in the Draize test of the drug furacilin, concentrate for the preparation of a solution for local and externaluse

The research of abnormal toxicity and locally irritating effect of the drug Furacilin, concentrate for the preparation of a solution for local and external use in comparison with the drug Furacilin, tablets for the preparation of the solution, was carried ou

Calculation of mutual information for nonlinear communication channel at large signal-to-noise ratio

Using the path-integral technique we examine the mutual information for the communication channel modeled by the nonlinear Schrödinger equation with additive Gaussian noise. The nonlinear Schrödinger equation is one of the fundamental models in nonlinear physics, and it has a broad range of applications, including fiber optical communications - the backbone of the internet. At large signal-to-noise ratio we present the mutual information through the path-integral, which is convenient for the perturbative expansion in nonlinearity. In the limit of small noise and small nonlinearity we derive analytically the first nonzero nonlinear correction to the mutual information for the channel

The influence of styles of family education on emotional-volitional sphere of the senior preschool children

The article discusses the style of family education as its most important characteristic, the most inherent ways of attitude of parents to a child, using certain means and methods of pedagogical influence, which are expressed in a peculiar manner of verbal circulation and interactio

Solid-state active media of tunable organic-compound lasers pumped with a laser. I. An XeCl laser

Оцифровано в НБ ТГ

Study of the selective phenolic inhibitors of arginase 2 acute toxicity

We have previously shown that the isolated arginase 2 inhibitors have a pronounced endothelioprotective level. A strategy is proposed for the targeted search for isolated arginase 2 inhibitors among compounds of a phenolic nature. Received 3 compounds, isolated arginase inhibitors 2. As a result of the study, the acute toxicity of the compounds obtained was studie

Digital receivers for low-frequency radio telescopes UTR-2, URAN, GURT

This paper describes digital radio astronomical receivers used for decameter and meter wavelength observations. This paper describes digital radio astronomical receivers used for decameter and meter wavelength observations. Since 1998, digital receivers performing on-the-fly dynamic spectrum calculations or waveform data recording without data loss have been used at the UTR-2 radio telescope, the URAN VLBI system, and the GURT new generation radio telescope. Here we detail these receivers developed for operation in the strong interference environment that prevails in the decameter wavelength range. Data collected with these receivers allowed us to discover numerous radio astronomical objects and phenomena at low frequencies, a summary of which is also presented.Comment: 24 pages, 15 figure

INDICATORS OF QUALITY AND COMPETITIVENESS OF ALCOHOLIC FERMENTATION PRODUCTS

The article presents the data obtained as a result of the study of the qualitative characteristics and indicators of the competitiveness of alcoholic fermentation products on the example of samples of light beer of various brands.В статье приведены данные, полученные в результате исследования качественных характеристик и показателей конкурентоспособности продуктов спиртового брожения на примере образцов светлого пива различных торговых марок

Сравнение адсорбционных свойств оксида цинка и шунгита в связи с их действием в качестве активаторов серной вулканизации

Determination of the adsorption characteristics of zinc oxide and shungite with respect to benzene vapor adsorption was carried out by the BET method. The specific surface area was calculated, the curves of pore volumes distribution according to their size were constructed. The possibility of using shungite as an activator of sulfur vulcanization of butadiene-nitrile rubbers was shown.Проведено определение адсорбционных характеристик оксида цинка и шунгита по адсорбции паров бензола методом БЭТ. Рассчитаны удельные поверхности, построены кривые распределения объемов пор по их размерам. Показана возможность применения шунгита в качестве активатора серной вулканизации бутадиен-нитрильных каучуко