scholarly journals DETERMINATION OF NEAR WELLBORE ZONE PROPERTIES FROM NON-STATIONARY TEMPERATURE MEASUREMENTS IN THE WELL

2017 ◽  
pp. 15-19
Author(s):  
D. F. Islamov ◽  
A. A. Sadretdinov
Keyword(s):  
Applied Pressure ◽  
Temperature Measurements ◽  
Problem Solution ◽  
Well Test ◽  
Recovery Curve ◽  
Skin Factor ◽  
Additional Information ◽  
Filtration Properties ◽  
Simulation Parameters

Common method of accounting for the deterioration of the filtration properties of the reservoir is the in-troduction of a dimensionless coefficient - skin factor. Traditionally, in order to determine the value of skin factor hydrodynamic research methods (well test) at non-stationary modes are applied (pressure recovery curve, level recovery curve) are used. In recent years, along with the pressure in well logging, bottom hole temperature dynamics is also recorded, that allows to use this data for obtaining the additional information about the reservoir and is a slower process, also about near wellbore zone. In this paper the possibility of de-termining the radius of the zone of permeability deterioration in the near wellbore zone from the non-stationary temperature measurements in well is studied; and also the sensitivity of the inverse problem solution to variation of simulation parameters.

Basic set of experiments for determination of mechanical properties of sand

2014 ◽  
Vol 62 (1) ◽  
pp. 129-137
Author(s):  
A. Sawicki ◽  
J. Mierczyński
Keyword(s):  
Mechanical Properties ◽  
Soil Mechanics ◽  
Physical And Mechanical Properties ◽  
Local Strain ◽  
Initial State ◽  
Laboratory Equipment ◽  
Additional Information ◽  
Basic Set ◽  
Initial Anisotropy

Abstract A basic set of experiments for the determination of mechanical properties of sands is described. This includes the determination of basic physical and mechanical properties, as conventionally applied in soil mechanics, as well as some additional experiments, which provide further information on mechanical properties of granular soils. These additional experiments allow for determination of steady state and instability lines, stress-strain relations for isotropic loading and pure shearing, and simple cyclic shearing tests. Unconventional oedometric experiments are also presented. Necessary laboratory equipment is described, which includes a triaxial apparatus equipped with local strain gauges, an oedometer capable of measuring lateral stresses and a simple cyclic shearing apparatus. The above experiments provide additional information on soil’s properties, which is useful in studying the following phenomena: pre-failure deformations of sand including cyclic loading compaction, pore-pressure generation and liquefaction, both static and caused by cyclic loadings, the effect of sand initial anisotropy and various instabilities. An important feature of the experiments described is that they make it possible to determine the initial state of sand, defined as either contractive or dilative. Experimental results for the “Gdynia” model sand are shown.

Precipitation and filtration of zinc, magnesium, copper and aluminium hydroxides

1982 ◽  
Vol 47 (12) ◽  
pp. 3362-3370
Author(s):  
Otakar Söhnel ◽  
Eva Matějčková
Keyword(s):  
Residence Time ◽  
Mean Residence Time ◽  
Filtration Resistance ◽  
Filtration Pressure ◽  
Bed Porosity ◽  
The Mean ◽  
Filtration Properties

Filtration properties of batchwise precipitated suspensions of Zn(OH)2, Mg(OH)2 and Cu(OH)2 and continuously precipitated Al(OH)3 were studied. For batchwise precipitated suspensions was verified the theoretically predicted dependence of specific filtration resistance on initial supersaturation and for the continuously precipitated Al(OH)3 the relation between the specific filtration resistance and the mean residence time of suspension in the reactor. Dependences were also recorded between the bed porosity and concentration of precipitated solutions, specific filtration resistance and used filtration pressure and the effect of aging of the batchwise precipitated suspension of Mg(OH)2on its filtration properties. The used CST method for determination of filtration characteristics of Zn(OH)2 suspension was also studied.

scholarly journals Determination of the order of fractional derivative for subdiffusion equations

2020 ◽  
Vol 23 (6) ◽  
pp. 1647-1662
Author(s):  
Ravshan Ashurov ◽  
Sabir Umarov
Keyword(s):  
Fractional Derivative ◽  
Fixed Time ◽  
Time Instant ◽  
Observation Data ◽  
Additional Information ◽  
Fractional Modeling ◽  
Time Fractional Derivative ◽  
The Right ◽  
Right Order

Abstract The identification of the right order of the equation in applied fractional modeling plays an important role. In this paper we consider an inverse problem for determining the order of time fractional derivative in a subdiffusion equation with an arbitrary second order elliptic differential operator. We prove that the additional information about the solution at a fixed time instant at a monitoring location, as “the observation data”, identifies uniquely the order of the fractional derivative.

scholarly journals Optimization of Financial Asset Neutrosophic Portfolios

Mathematics ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 1162
Author(s):  
Marcel-Ioan Boloș ◽  
Ioana-Alexandra Bradea ◽  
Camelia Delcea
Keyword(s):  
Capital Market ◽  
Financial Risk ◽  
Financial Asset ◽  
Financial Assets ◽  
Portfolio Risk ◽  
Financial Return ◽  
Additional Information ◽  
Triangular Numbers ◽  
The Capital Market

The purpose of this paper was to model, with the help of neutrosophic fuzzy numbers, the optimal financial asset portfolios, offering additional information to those investing in the capital market. The optimal neutrosophic portfolios are those categories of portfolios consisting of two or more financial assets, modeled using neutrosophic triangular numbers, that allow for the determination of financial performance indicators, respectively the neutrosophic average, the neutrosophic risk, for each financial asset, and the neutrosophic covariance as well as the determination of the portfolio return, respectively of the portfolio risk. There are two essential conditions established by rational investors on the capital market to obtain an optimal financial assets portfolio, respectively by fixing the financial return at the estimated level as well as minimizing the risk of the financial assets neutrosophic portfolio. These conditions allowed us to compute the financial assets’ share in the total value of the neutrosophic portfolios, for which the financial return reaches the level set by investors and the financial risk has the minimum value. In financial terms, the financial assets’ share answers the legitimate question of rational investors in the capital market regarding the amount of money they must invest in compliance with the optimal conditions regarding the neutrosophic return and risk.

scholarly journals Can Job Satisfaction Mediate the Relationship between Emotional Intelligence and Spiritual Intelligence on Teacher Performance?

2021 ◽  
Vol 5 (1) ◽  
pp. 136
Author(s):  
Efendi Efendi ◽  
Sri Harini ◽  
Sudung Simatupang ◽  
Marto Silalahi ◽  
Acai Sudirman
Keyword(s):  
Job Satisfaction ◽  
Emotional Intelligence ◽  
Teacher Performance ◽  
Partial Least Square ◽  
Least Square ◽  
Spiritual Intelligence ◽  
Additional Information ◽  
Saturated Sample ◽  
The Relationship

This study aims to analyze the role of job satisfaction in mediating the relationship between emotional intelligence and intellectual intelligence on the performance of the high school teachers. This study uses a research design with an associative quantitative approach. Data was collected through documentation and online questionnaires. This study used a sample of 39 respondents with the determination of the sample size using the saturated sample formula. Partial least square is applied to examine the relationship between teacher performance, job satisfaction, emotional intelligence and intellectual intelligence. The results of this study indicate that of the seven hypotheses developed there are two accepted hypotheses, that is, for the effect of emotional intelligence on job satisfaction, it is obtained that the results of a significant effect and the influence of spiritual intelligence on teacher performance are also obtained significant results. Meanwhile, the other 5 hypotheses developed were not significant. Through the findings of this study, it is hoped that it can provide additional information for various parties, especially the school, to pay attention to the factors that affect teacher performance and job satisfaction, so that teachers gain comfort and confidence to continue to improve their performance in implementing learning in schools.

scholarly journals Substantiation of the perspectivity of improving of the population informing about the criteria of the correct choice of modern multivitamin drugs

2021 ◽  
pp. 4-9
Author(s):  
Tetiana Kutsenko ◽  
Dmitro Semeniv ◽  
Katherina Shchokina ◽  
Galina Belik ◽  
Yurii Stoletov ◽  
...  
Keyword(s):  
Correct Choice ◽  
General Information ◽  
The Internet ◽  
Health Care Education ◽  
Men And Women ◽  
Educational Levels ◽  
Additional Information ◽  
Level Of Knowledge ◽  
Pharmaceutical Education

The aim. Determination of the need to raise awareness of the population about multivitamins and the criteria for their rational choice. Materials and research methods. To achieve the goal of the study, it was necessary to develop a questionnaire for visitors to pharmacies and carry out an anonymous survey of them. All adult visitors of the pharmacy were attracted to the survey. The developed questionnaire consisted of 3 parts and contained 32 questions processed in the course of our own research. Research results. Among the pharmacy visitors we surveyed, the majority were between the ages of 35–55, approximately equally divided were men and women who mainly lived in the Kiev region (87 %), were not students and did not have educational levels of bachelor or master, and had no relation in health care education. Summarizing the information obtained in the course of processing questionnaires with the answers of visitors to pharmacies, it can be noted that in the surveyed group of respondents there is a certain interest and indifference to the discussed aspects, but quite often there is a lack of knowledge in this regard. Conclusions. In the course of analyzing the results of the questionnaire survey, the level of awareness of the population regarding general information about the pharmacology of multivitamin drugs and the criteria for their correct choice was determined. From the data obtained, it can be concluded that on many issues the respondents showed an insufficient level of knowledge, which justifies the need for additional information about multivitamins, and indicates that better it should be done with participation of a specialist with a pharmaceutical education or physician. Mostly the population lacks knowledge on the issues listed in the second part of the questionnaire, namely, on general information about the biological and pharmacological properties of vitamins. It was found that the information obtained from the Internet or other media, including advertising, has a significant impact on the awareness and decision of the respondents

scholarly journals Significance of the ‘National and Cultural Component’ When Teaching Foreign Languages (Using Korean as an Example)

2021 ◽  
Vol 20 (2) ◽  
pp. 49-56
Author(s):  
Lyudmila A. Voronina ◽  
Sergey A. Letun
Keyword(s):  
Teaching Methods ◽  
Native Speakers ◽  
Foreign Languages ◽  
Lexical Meaning ◽  
Additional Information ◽  
Cultural Information ◽  
Effective Delivery ◽  
Translation Methods ◽  
Cultural Component

Key approaches to clarify the notion of the national and cultural component were explored in application to the task of teaching lexical means of communication to Russian speaking students. The authors highlight its significant features that are important in terms of the teaching methods. A number of conclusions, which are significant for this task, were made based on the results of analyzing Korean sememes. The meanings, which are correlated with the national-cultural information conveying ethnocultural realities of the native speakers of the studied language, were determined. Groups of actual issues related to the determination of the scope of national-cultural information to be mastered by the students, mechanisms of its transmission in teaching and methods for the formation of relevant associations and images were highlighted. It is shown that the scope of accumulation of national-cultural information can vary at a certain level of education, therefore, it seems reasonable to talk about the list of associations as additional information to a certain lexical meaning, which has yet to become knowledge and be subsequently used at the stages of training and application of forming the lexical skills. It is stated that in respect of the linguo-didactic aspect it seems more rational to talk about a certain number of associations necessary for complete disclosure of the lexical meaning of the words, since neither translation nor non-translation methods of semantization by themselves allow students to differentiate the corresponding concepts without additional national-cultural information. Thus, methods of the most effective delivery of such information are to be specified for better results of teaching lexical means of communication to students.

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