91 research outputs found
Lingvocognitive specificity of metaphorical modeling in Russian oil and gas terminology
The article represents the results of the research of the metaphorical fragment of oil and gas terminology in the Russian language from the perspective of conceptual modeling. The conducted research allows one to assert that the models involved in the process of the metaphorical conceptualization in the framework of the national worldview are universal. The comparative analysis of the metaphorical fragments of the Russian and English terminological systems showed the asymmetry of both the qualitative and quantitative types
Fluid Flow Prediction with Development System Interwell Connectivity Influence
In this paper interwell connectivity has been studied. First of all, literature review of existing methods was made which is divided into three groups: Statistically-Based Methods, Material (fluid) Propagation-Based Methods and Potential (pressure) Change Propagation-Based Method. The disadvantages of the first and second groups are as follows: methods do not involve fluid flow through porous media, ignore any changes of well conditions (BHP, skin factor, etc.). The last group considers changes of well conditions and fluid flow through porous media. In this work Capacitance method (CM) has been chosen for research. This method is based on material balance and uses weight coefficients lambdas to assess well influence. In the next step synthetic model was created for examining CM. This model consists of an injection well and a production well. CM gave good results, it means that flow rates which were calculated by analytical method (CM) show matching with flow rate in model. Further new synthetic model was created which includes six production and one injection wells. This model represents seven-spot pattern. To obtain lambdas weight coefficients, the delta function was entered using by minimization algorithm. Also synthetic model which has three injectors and thirteen producer wells was created. This model simulates seven-spot pattern production system. Finally Capacitance method (CM) has been adjusted on real data of oil Field [omega]. In this case CM does not give enough satisfying results in terms of field data liquid rate. In conclusion, recommendations to simplify CM calculations were given. Field [omega] is assumed to have one injection and one production wells. In this case, satisfying results for production rates and cumulative production were obtained
Assessment of Economic Effectiveness of Competing IT-projects: Approaches and Mathematical Tools
Evaluation of the effectiveness of the implementation and development of information systems and information technology is one of the challenging tasks in managing it projects. However, we also know that it affect the success of the company, but they also require large investments and carry significant risks. Therefore, the decision to select the automation of business processes should be after in-depth analysis with mathematical tools. The purpose of this work is to show the possibility of expanding the mathematical apparatus of analysis of it projects that require significant investment. The article presents examples of results of expert opinion for estimation of expected cash flows, considering the risks when investing in competing projects, based on the methods of mathematical statistics. Describes the conditions of the solution of a multicriteria problem of choice of one it project of the alternatives, based on economic sense of indicators of risk. The rationale for the use of different methods when comparing projects of different durations (chain of repetition, equivalent annuity, etc.). The introduction of new information systems affects the quality indicators of the business, including improving productivity, reducing errors in performing the tasks, and thereby improving financial results. Selected mathematical methods will allow for different stages of decision-making to provide comprehensive and scientifically-based analysis of project performance and objectivity of the decisions made by the IT-manager
A solution to the problem of clustered objects compact partitioning
The urgency of the study consists in the fact that an object arrangement topology of a distributed system is often nonuniform. Objects can be placed at different distances from each other, thus forming clusters. That is why solving the problem of compact partitioning into sets containing thousands of objects requires the most effective way to a better use of natural structuring of objects that form clusters. The aim of the study is the development of methods of compact partitioning of sets of objects presented as clusters. The research methods are based on applied theories of sets, theory of compact sets and compact partitions, and linear programming methods with Boolean variables. As a result, the paper offers the method necessary to analyze composition and content of clusters. It also evaluates cluster compactness, which results in the decision to include clusters into the sets of partitions. It addresses the problem of optimizing the rearrangement of objects between compact sets that form clusters, which is based on the criteria of maximizing the total compactness of sets. The problem is formulated in the class of objectives of linear programming methods with Boolean variables. It introduces the example of object rearrangement
Quantum spin chain as a potential realization of the Nersesyan-Tsvelik model
It is well established that long-range magnetic order is suppressed in
magnetic systems whose interactions are low-dimensional. The prototypical
example is the S-1/2 Heisenberg antiferromagnetic chain (S-1/2 HAFC) whose
ground state is quantum critical. In real S-1/2 HAFC compounds interchain
coupling induces long-range magnetic order although with a suppressed ordered
moment and reduced N\'eel temperature compared to the Curie-Weiss temperature.
Recently, it was suggested that order can also be suppressed if the interchain
interactions are frustrated, as for the Nersesyan-Tsvelik model. Here, we study
the new S-1/2 HAFC, (NO)[Cu(NO3)3]. This material shows extreme suppression of
order which furthermore is incommensurate revealing the presence of frustration
consistent with the Nersesyan-Tsvelik model
The Role of Electrostatic Interactions in Complex Formation between Bacterial Luciferase and NADPH:FMN-oxidoreductase
A possible mechanism of complex formation between bacterial luciferase and NADPH:FMNoxidoreductase from Vibrio harveyi sustained by electrostatic forces is studied. The complex between the enzymes is important for a direct FMNH2 transfer without a contact with solvent, which could cause a rapid autooxidation and the formation of reactive oxygen species. In the current work the diversity of possible relative positions of NADPH:FMN-oxidoreductase and luciferase was obtained with Monte-Carlo sampling governed by oxidoreductase internal charged groups and electrostatic field caused by luciferase. Among the structures with the minimal energies, the one was found that has a proper active sites orientation for a direct FMNH2 transfer. Possible role of hydrogen bonding between Arg291 and Gln197 of luciferase and oxidoreductase, respectively, in stabilization of this complex is propose
The effect of processing conditions on the dielectric properties of doped calcium lanthanum nickelate
The influence of thermal and thermobaric (TBT) effects on the structure, microstructure, and dielectric properties of ceramics based on solid solutions of the La1.8Ca0.2Ni0.8M0.2O4+Ξ΄ (M = Co, Cu) composition was studied. TBT treatment of the samples leads to a change in the grain morphology of ceramics and an increase in the dielectric constant compared to its value only after heat treatment. The change in the anisotropy of the coordination (La,Ca)O9 and (Ni,M)O6 polyhedra after TBT contributed to interlayer polarization in the crystal structure of La1.8Ca0.2Ni0.8M0.2O4+Ξ΄
Optimization of neuropsychological rehabilitation of higher mental functions in junior schoolchildren with mild intellectual disability
The article studies the effectiveness of complex neuropsychological rehabilitative impact on the nonverbal and verbal higher mental functions (HMFs) in junior schoolchildren with mild intellectual disability (ID) in comparison with the impact exclusively on the verbal HMFs in the same category of children.Π ΡΡΠ°ΡΡΠ΅ ΡΠ°ΡΡΠΌΠ°ΡΡΠΈΠ²Π°Π΅ΡΡΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΡ Π½Π΅ΠΉΡΠΎΠΏΡΠΈΡ
ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΊΠΎΡΡΠ΅ΠΊΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π½Π° Π½Π΅Π²Π΅ΡΠ±Π°Π»ΡΠ½ΡΠ΅ ΠΈ Π²Π΅ΡΠ±Π°Π»ΡΠ½ΡΠ΅ Π²ΡΡΡΠΈΠ΅ ΠΏΡΠΈΡ
ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΡΠ½ΠΊΡΠΈΠΈ Π΄Π΅ΡΠ΅ΠΉ ΠΌΠ»Π°Π΄ΡΠ΅Π³ΠΎ ΡΠΊΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ Π²ΠΎΠ·ΡΠ°ΡΡΠ° Ρ Π»Π΅Π³ΠΊΠΎΠΉ ΡΡΠ΅ΠΏΠ΅Π½ΡΡ ΡΠΌΡΡΠ²Π΅Π½Π½ΠΎΠΉ ΠΎΡΡΡΠ°Π»ΠΎΡΡΠΈ
A solution to the problem of clustered objects compact partitioning
The urgency of the study consists in the fact that an object arrangement topology of a distributed system is often nonuniform. Objects can be placed at different distances from each other, thus forming clusters. That is why solving the problem of compact partitioning into sets containing thousands of objects requires the most effective way to a better use of natural structuring of objects that form clusters. The aim of the study is the development of methods of compact partitioning of sets of objects presented as clusters. The research methods are based on applied theories of sets, theory of compact sets and compact partitions, and linear programming methods with Boolean variables. As a result, the paper offers the method necessary to analyze composition and content of clusters. It also evaluates cluster compactness, which results in the decision to include clusters into the sets of partitions. It addresses the problem of optimizing the rearrangement of objects between compact sets that form clusters, which is based on the criteria of maximizing the total compactness of sets. The problem is formulated in the class of objectives of linear programming methods with Boolean variables. It introduces the example of object rearrangement
Monitoring of the Effectiveness of Public Relations to Optimize the Website of the Ministry of the Russian Federation for Affairs for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters
Development of websites as an important component of PR-collaboration to achieve their audiences in today's information environment has become one of the defining criteria of perception of the effectiveness of state institutions activities. The study presents the initiation of market research to identify advantageous features, tools, and internet communication technologies in the activities of the five public institutions of Rostov region. Data analysis served as the justification for proposals of the expert group on benchmarking for the website of the Southern Regional Center of the Ministry of the Russian Federation for Civil Defense, Emergencies and Elimination of Consequences of Natural Disasters (SRC MES of Russia).
Keywords: expert survey method, website optimization, online communications, public relations
JEL Classifications: A10, 010, Z1
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