Reliability model of fault-tolerant data processing system with primary and backup nodes

Rahman, P A; Bobkova, E Yu

doi:10.1088/1757-899x/124/1/012023

Cited by 8 publications

(4 citation statements)

References 2 publications

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“…The dependence shown in the figures describes the value of normal and shear stresses at the line of intersection of the surface of the fracture with the cylindrical wellbore wall. The straight line represents the so-called line of minimum dry friction resistance for rocks in the interval of the target reservoir (Rahman and Bobkova, 2016;Shatalova et al, 2015;Yemelyanov et al, 2019;Maulana et al, 2019). If at the fracture point the combination of standard and shear stress exceeds the line of minimum dry friction resistance, then this region of the fracture experiences displacement along the surface, and in this region the fracture becomes conductive due to the tensile strain arising.…”

Section: Figure 7 Diagram Of the Influence Of Factors On The Success Of Well Killingmentioning

confidence: 99%

Specifics of Well Killing Technology During Well Service Operation in Complicated Conditions

Mardashov¹,

Islamov²,

Nefedov³

2020

PTQ

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The process of the well killing operations in the oil and gas condensate field in Volga-Ural province is complicated due to several conditions like fractured carbonate reservoir, abnormally low reservoir pressure, high gas-oil ratio, high hydrogen sulfide content, acid fracturing, and hydrochloric acid treatments requirement. During the well killing process, significant gas breakthroughs and fluid loss are observed in this field, which requires significant usage of blocking compositions (up to 50-100 m3 per single well) and increases the well service costs. The aim of this work was to increase the well killing efficiency during well service by studying the mechanisms that take place near the wellbore zone during this process. The application of statistical and multifactor analysis of well-killing processes were conducted from 2018 to 2019, which allowed highlighting the main reasons for the low success of these works. The calculation results showed that the stress state near the well significantly differs from the regional stress field and varies depending on the generated pressure in the well, which in turn affects the activity of fractures near the wellbore. The revealed mechanisms that take place near the wellbore zone coupled with the laboratory and pilot tests of the blocking compositions can be used to improve the well service operations at the oil and gas condensate field in the Volga-Ural province. In this work, it was concluded that it is important to use the geomechanical approach to increase the well killing efficiency in combination with a complex of laboratory rheological and filtration tests of blocking compositions.

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Section: Figure 7 Diagram Of the Influence Of Factors On The Success Of Well Killingmentioning

confidence: 99%

Specifics of Well Killing Technology During Well Service Operation in Complicated Conditions

Mardashov¹,

Islamov²,

Nefedov³

2020

PTQ

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“…The development presented in the article is based on the equations of A. Kolmogorov [10][11]. Their use has the advantage that statistics on individual IM nodes are known.…”

Section: Development Of Criteria For Efficient Operation Of the Im Fleetmentioning

confidence: 99%

Methods and means of increasing operation efficiency of the fleet of electric motors in non-ferrous metallurgy

Курилин¹,

Дли²,

Rubin³

et al. 2020

nfm

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Arranging efficient operation of the fleet of induction motors (IM) in non-ferrous metallurgy is a large-scale technical and economic problem. In scientific aspect, the problem is being solved in the framework of two research lines: in developing criteria for the efficient operation of the branch IM fleet and towards the development of methods and tools for implementing the IM fleet efficient operation. The article presents the results of the authors’ work in the mentiond areas. The basis for developing criteria for efficient operation is modeling of current operational states, taking into account the IM operational aging processes. The existing methods and models are poorly focused on fixation of the changes caused by operational aging. There exists a demand for special methods and tools for modeling the IM operational conditions. A mathematical model based on Kolmogorov equations is one of these tools. The system graph and equations of the mathematical model are given. An example of a practical calculation of the no-failure operation probabilities at different rates of repair operations is given. It is stated that the offered mathematical model can serve as an instrument for developing criteria of the IM pool efficient operation. The system of periodic operational diagnostics is ment to be a key element in enhancement of the IM fleet operation efficiency. A topological method worked out for the problems of operational diagnostics is focused upon analyzing the dynamics of operational changes taking place in the IM vector space. The matrix of current deviations is a medium of objective and reliable information about the current IM technical condition. Matching the matrices of current and limiting deviations allows us to make several essential conclusions concerning the IM technical state. The reported study was funded under as a part of state assignment (project number, FSWF-2020–0019), as well as at the expense of RFBR (project number, 20-01-00283).

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“…In turn, the practical experience of application of the legislation on CFCs indicates the existence of various opinions of the economists Iurko (2018) and Arner (2020), pointing out the shortcomings of certain existing provisions. In particular, these shortcomings concern the established threshold for notification and income tax payment (Lehoux, 2019), the additional burden on businesses related to the translation of statements for national use (Kosov, 2016;Vertakova et al, 2019;Akhmetshin et al, 2019), and the absence of clearly established provisions distinguishing between revenues in various industry aspects (Bykanova, 2018;Rahman and Bobkova, 2016;Prodanova et al, 2019). To date, many issues have not been resolved, the legislation on CFCs in the framework of national regulation continues to be edited, amended, and improved (Petrova, 2019;Puryaev et al, 2019).…”

Section: Entrepreneurship and Sustainability Issuesmentioning

confidence: 99%

Controlled foreign companies: influence on the sovereignty of the national tax base

Khoruzhy¹,

Karabasheva²,

Hajiyev³

et al. 2020

JESI

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World experience in economic development over recent periods indicates that, despite periodically occurring crisis situations, including globalization processes appearing all over specific countries, Such situations consistently develop on a more accelerated scale. Undoubtedly, the crisis situation that developed in the world market in the first half of 2020 under the influence of COVID-19 on all economies of countries without exception has had a great influence, and the nature of such an influence will certainly be felt over the next several years. In this vein, the establishment of the rules applicable in a particular jurisdiction regarding the activities of controlled foreign companies is one of the mechanisms for any state to protect its own national tax base. Using this approach, the modern rules of tax regulation of controlled foreign companies provide for the establishment of special rules for the shareholders, acting as controlling persons in terms of profits obtained from their foreign companies. At the same time, the application of tax exemptions to the profits of controlled foreign companies is undoubtedly one of the riskiest operations, despite the fact that a wide list of grounds for their application may be provided for within the specific state. As a result of a study of the activities of controlled foreign companies operating within the framework of national jurisdiction, when analyzing the degree of influence of tax bases, a strongly pronounced linear relationship with a correlation coefficient of -0.93 was revealed. This circumstance made it possible to identify the following important feature for controlled foreign companies: financial corporations are no longer attracted by the option of being in a specific national jurisdiction; moreover, they are more focused on other jurisdictions, including low-tax or offshore ones. The correlation analysis revealed a strongly pronounced linear relationship between the tax base and the tax rates; however, in terms of controlled foreign companies, which are primarily subject to national legislation, the correlation coefficient amounted to +0.89, which characterizes the economic tendency to reduce their financial investments, despite the reduction of the actual tax rate. In turn, for controlled foreign companies, whose activities are regulated to a greater extent by foreign legislation, the correlation coefficient amounted to -0.93, which is characterized by a reflection of the greater economic effect of actual tax rate reduction according to the following scenario: the tax rate reduction represents more financial injections for a particular national jurisdiction. At the same time, against the background of the quite consistent and successful in specific areas unification of EU tax rules, the problem of the incoherence of the rules concerning controlled foreign companies versus national jurisdictions of both ENTREPRENEURSHIP AND SUSTAINABILITY ISSUES

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Reliability model of fault-tolerant data processing system with primary and backup nodes

Cited by 8 publications

References 2 publications

Specifics of Well Killing Technology During Well Service Operation in Complicated Conditions

Specifics of Well Killing Technology During Well Service Operation in Complicated Conditions

Methods and means of increasing operation efficiency of the fleet of electric motors in non-ferrous metallurgy

Controlled foreign companies: influence on the sovereignty of the national tax base

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