New Model For Distribution Research Articles

Equal Quality Distribution of Two-Phase Fluid by Isokinetic Principle

Summary In thermal recovery of heavy oil, phase separation often occurs when a steam-water stream turns to branches in a junction and distributor, thereby resulting in a significant quality deviation between branches. Although a lot of efforts have been made during the past decades, the problem is still not well solved. Inspired by the principle of the isokinetic probe, this paper builds a new model of distribution. The major change is that the inner space of the main pipe is isolated into fan-shaped isokinetic flow channels, each connecting to a side branch. Flow control devices are installed at the outlet of each branch. Moreover, a swirler is used to convert the incoming flow pattern into a uniform swirling gas core-annular flow before the new isokinetic dividing system. Computational fluid dynamics (CFD) simulations were conducted to reveal the characteristics of gas-liquid two-phase flow within the distributor. The characteristics of both under isokinetic and nonisokinetic flow conditions were analyzed. The most interesting result is that once the uniform swirling gas core-annular flow is formed, liquid film flow becomes very stable and is almost unaffected by the operation deviations from the isokinetic condition, whereas gas flow is much more sensitive to the deviations. The more deviation of isokinetic condition, the more deflection of gas flow or phase separation will take place and the greater quality deviation will be. Air-water two-phase flow experiments were also conducted to verify the CFD results.

Verification of a New Model of Distribution of Irradiation in Water From a Point Unidirectional Source Using the Monte Carlo Method

Verification of a New Model of Distribution of Irradiation in Water From a Point Unidirectional Source Using the Monte Carlo Method

Specialized Mobile Applications as Means of Optimizing the Power Supply System of the Republic of Belarus

The active development of the mobile platforms sector such as smartphones, smart watches, fitness bracelets and other wearable electronic devices in the last 4 years has caused a huge growth of the market of mobile applications-services. Western countries are actively implementing mobile applications-services for household energy users. In Belarus, there is a positive dynamics in the number of active users of applications-services, every year it is possible to attract 7 % of unique customers. In the present paper the experience of implementation and operation of the mobile application for power systems is analyzed. The dynamics of the market of mobile applications-services has been traced: the amount of time spent by the person in interaction with the device was determined as well as the total expenditure of funds in the application at the moment; also, the growth of expenses within the applications was forecasted. The potential benefits for business and end-users of services from the implementation of mobile applications-services were demonstrated. Their properties, main qualities and advantages over traditional methods of “business – client” interaction are considered. A number of features needed for the successful functioning of the mobile application in the power system of Belarus are identified. The process of creating software for smart devices has been studied and the functionality needed by the mobile application for the power system has been proposed for attracting new users. A special algorithm for the launch and successful “life cycle” of a mobile application has been proposed. It allows to operate and develop mobile applications-services as efficiently as possible, as well as to avoid the most common errors at the stages of their development and launch. The implementation of a mobile application in the power system of the Republic of Belarus, in the long-term, will significantly increase customer loyalty, simplify interaction with users, make it possible to build new models of distribution of electricity, and, consequently, regulate the demand for energy resources.

De la televisión de pago al video bajo demanda. Análisis de la primera temporada de la estrategia de producción original de ficción de Movistar+

The article analyzes the first season of the original fiction strategy by the pay-TV platform Movistar+. Alt-hough it was announced at the end of 2014, its first series was not released until September 2017, which was followed by seven more series until June 2018. The research is based on a double hypothesis. First, this strategy of original fiction showed the transformation of the traditional model of pay-TV into a new model of distribution focused on video-on-demand. Second, this transformation was made seeking to as-sociate the Movistar+ brand with values related to difference and quality. The examination of the eight se-ries released in this period allows us to observe the transformation of the production model of pay televi-sion in search of a personalized consumption.

Modeling of particle size distribution of limestone in sulfur capture in air and oxy-fuel circulating fluidized bed combustion

Modeling of particle size distribution of limestone in sulfur capture in air and oxy-fuel circulating fluidized bed combustion Jaakko Saastamoinen,1 Antti Tourunen,2 Timo Leino,1 Toni Pikkarainen,1 1VTT Technical Research Centre of Finland Ltd, Jyväskylä, 2Reteres Oy, Äijälä, Finland Abstract: Measurements for partition of Ca-containing compounds in particles in air and oxy-fuel combustion are presented. A model for steady and unsteady state particle size distribution (PSD) of limestone including the effects of PSD of the feed, attrition, fly ash, and bottom ash removal is presented. By incorporating models for sulfation, a new model for distribution of Ca-containing compounds CaCO3, CaO, and CaSO4 in different particle sizes during sulfation is found. The model can be applied to study the effects of different factors on the PSD of limestone in the bed, to optimize the PSD in the bed, and to study reasons for the measured PSDs and distributions of Ca-containing compounds in different size fractions in the bed in sulfur capture in circulating fluidized bed combustion in air and oxy-fuel conditions. Keywords: limestone, sulfur capture, circulating fluidized bed, population balance modeling, oxy-fuel

Mechanism of wet shotcrete interacting with rock in support systems

In order to have a good understanding of the behavior of wet shotcrete as a support element interacting with the rock mass, mechanism of wet shotcrete interacting with rock in support systems was analyzed through theoretical, numerical study and analytical analysis. A new model of distribution of rock stress state after wet shotcrete was applied, which includes shotcrete layer, composite layer, strengthening layer, plastic layer and elastic layer, and a full illustration of the rock mass stress state was given after shotcrete interacting with rock mass. At the same time, numerical analysis with FLAC gives a stress distribution along the monitor line, respectively, at the sidewall and roof of the tunnel. The displacement obviously decreases with the depth of rock, the tangential stress for tunnel supported by shotcrete is lower than that without shotcrete, and radial stress for tunnel supported by shotcrete is higher than that without shotcrete. It has been demonstrated by AIRY’S stress function, which gives a reasonable solution. Finally, the application of wet shotcrete in Jinfeng Gold Mine shows that the displacement of tunnel decreases obviously in sidewall and roof.

Preselection of celestial objects’ signals on CCD-image

The method of preselection of celestial objects’ signals is offered, which is based on comparing of values of spatial convolution of the accepted radiation, in the neighbour of image's peak, and by a mask, corresponding to the form of the expected signal, to the threshold. The new model of distribution of values of spatial convolution is offered, which is represented a mixture of normal distribution law and "tail", which is situated in area of large values of spatial convolution. An approximate selection of normal ("base-line") component of distribution of values of spatial convolution is followed the developed computational method for determination of rejection threshold of image's peaks, in the neighborhood of which celestial objects’ signals are absent. The method has used by authors in developed system of automatic online new asteroids detection and known asteroids tracking.

Separate Spheres Bargaining and the Marriage Market

This paper introduces the bargaining model, a new model of distribution within marriage. It differs from divorce threat bargaining models (e.g., Manser-Brown, McElroy-Horney) in that the threat point is not divorce but a noncooperative equilibrium within marriage; this noncooperative equilibrium reflects traditional gender roles. The predictions of our model thus differ from those of divorce threat bargaining models; in the separate spheres model, cash transfer payments to the mother and payments to the father can--but need not--imply different equilibrium distributions in existing marriages. In the long run, the distributional effects of transfer policies may be substantially altered by changes in the marriage market equilibrium.

A model for word clustering

It is common to model the distribution of words in text by measures such as the Poisson approximation. However, these measures ignore effects such as clustering: our analysis of document collections demonstrates that the Poisson approximation can significantly overestimate the probability that a document contains a word. Based on our analysis, we propose a new model for distribution of words in text, and show how this model can be used to estimate the probability that a document contains a word and the number of distinct words in a document. © 1992 John Wiley & Sons, Inc.