Optimization of the power consumption mode of pumping stations of “Suv Okova” by reactive power

The optimal modes of the existing compensating devices under operating conditions were determined. Minimum power and energy losses were taken as optimality criteria. The unconstrained optimization problem was considered, i.e., finding the absolute minimum. When solving the problem to find the optimal mode of operation of the “SUV OKOVA” network, a relative minimum was found since the system of constraints has a nonlinear form. The problem of conditional optimization in terms of reactive power is solved, for which the gradient method of quadratic programming is used

Fundamentals of property and compositions management concrete mix and concrete

The choice of the concrete composition following the set research tasks must satisfy the following requirements: 1-the maximum achievable strength on the given starting materials; 2-the required formability, corresponding to the accepted vibration-impact-peristaltic pressing; 3-a given level of dehydration of the concrete mixture, providing a residual W/C, close to the normal density of the cement paste. The accepted conditions are necessary and sufficient when using the physical-analytical method of designing concrete composition. Distinctive features of the method are the use of a large amount of information and the absence of arbitrary coefficients, technological constants, or parameters. The necessary data for the assignment of concrete compositions are determined according to the data of preliminary laboratory experiments, the given technological parameters of mechanisms and equipment, and the design characteristics of concrete and the structure to be formed. For the experimental study, a total of six independent information streams of initial data are used: 1-physical and mechanical properties of the constituents of concrete (Rc, ρc, ρc°, [V/C], рс, γ3, ρshch, γsh, γshch°); 2-laboratory data of tests of raw materials in concrete mix and concrete (a, b, c, Ku, A, B); 3-design characteristics of concrete mix and concrete (Rb, F, W, OK, Zh); 4-characteristics of the product to be concreted (V, h, l, μ); 5-technological characteristics of equipment, mechanisms, and devices (th, tb, TO, t0); 6-the cost per unit volume of raw materials (Sc, Cn, Ssh, Se, Sg). Obviously, the listed volume of initial information comprehensively characterizes the materials used and the conditions for forming the product. The previously developed technological conditions for forming concrete pipes, in addition to the above, require, when assigning the composition of concrete, to take into account the observance of the balance of masses in the concrete mixture and compacted, modified concrete. This should be manifested in checking the equation of absolute volumes for the original and compacted (dewatered) concrete

Development of gender entrepreneurship

The article allows us to consider the socio-economic factors of the development of entrepreneurship among the female population of the Republic of Uzbekistan in the modern world. The aim of the study is the objective and subjective factors of female entrepreneurship that affect the employment of women. The digital economy is a positive factor in creating a favorable climate for business opportunities for women in entrepreneurship. Internet innovations are gaining more and more popularity; women entrepreneurs acquire the skill of working with digital technologies in their free time from their families. The study of the topic was carried out on the basis of an analysis of scientific literature, modern data, in the field of the formation and development of women's entrepreneurship. The main research methods are analysis, grouping, brainstorming, synthesis. In the conclusion, the ways of creating favorable conditions for the growth of economic activity of women are revealed, which is impossible without the participation of the state and the private sector

Development of Entrepreneurial Skills on the Basis of Innovative Technologies

The article notes that the quality of education in developed countries is determined by the level of initiative of the staff, the level of development of its innovative and creative activity, the practice of developing entrepreneurial abilities of students based on socio-psychological trainings, business games, television shows, debates in South Korea, China is also widespread. Russia, Germany and France, including reforms in the education system, are focused on issues of developing entrepreneurship in the future, improving mechanisms for their development creativity.Along with the foregoing, the article focuses on the sociological and anthropological components and ethno-regional factors of entrepreneurship development, the national mentality and principles of social partnership as a result of global research on entrepreneurship development

Development of Entrepreneurial Skills on the Basis of Innovative Technologies

The article notes that the quality of education in developed countries is determined by the level of initiative of the staff, the level of development of its innovative and creative activity, the practice of developing entrepreneurial abilities of students based on socio-psychological trainings, business games, television shows, debates in South Korea, China is also widespread. Russia, Germany and France, including reforms in the education system, are focused on issues of developing entrepreneurship in the future, improving mechanisms for their development creativity.Along with the foregoing, the article focuses on the sociological and anthropological components and ethno-regional factors of entrepreneurship development, the national mentality and principles of social partnership as a result of global research on entrepreneurship development

Emotional and Psychological Behavior of Children in the Context of Transforming Modern Society

This study aimed to evaluate the dynamics of emotional and psychological behavior indicators in children aged 7-8 years in modern society. The study was conducted in 2018-2019 in Moscow (Russian Federation) and included a total of 600 children of the second – third grades in three secondary schools. The first group included children from families with high social status and higher education of both parents, the second group comprised children from middle-class families with secondary special education of parents, and the third group enrolled children from low-income families with incomplete secondary education of parents. Children were tested for aggressiveness as well as attitudes toward family members. It has been established that in the first group, the model of upbringing was dominated by hyper-socialization of the authoritarian type. In the second group, the model of education was more balanced, symbiosis and cooperation dominated, exceeding the other parameters by 1.3–1.9 times (p ≤ 0.05). In the third group, average and high levels of aggression were stated to be significantly higher – 1.6–2.2 times (p ≤ 0.01). In the third and first groups, there was a direct connection between the frequency of instrumental aggression and negative attitude towards siblings (0.65 and 0.84, respectively)

Optimization of the power consumption mode of pumping stations of “Suv Okova” by reactive power

The optimal modes of the existing compensating devices under operating conditions were determined. Minimum power and energy losses were taken as optimality criteria. The unconstrained optimization problem was considered, i.e., finding the absolute minimum. When solving the problem to find the optimal mode of operation of the “SUV OKOVA” network, a relative minimum was found since the system of constraints has a nonlinear form. The problem of conditional optimization in terms of reactive power is solved, for which the gradient method of quadratic programming is used

Study of the strength properties of modified concrete in tension

The resistance of concrete to axial tension is much less than the resistance to compression and is largely determined by the adhesion of its components. The low tensile strength of ordinary concrete is explained by the heterogeneity of its structure and the discontinuity of concrete, which contributes to the development of stress concentration, especially under the action of tensile forces. To increase the tensile strength of concrete, it is necessary to eliminate, first of all, the heterogeneity of the structure of concrete - one of the main reasons for the large dispersion of the results of mechanical tests of this material, which affects the experimental determination of compressive strength. A significant difference between the compressive strength for ordinary concrete indicates a rather large spread of such values. This scatter is explained by the different influence of factors on tension and compression. For example, for ordinary concretes, it was found that with an increase in W/C , the tensile strength decreases, but to a lesser extent than the compressive strength. With an increase in the grade of concrete, the tensile strength increases. High-strength concretes, as a rule, prepared on concrete mixes with low W/C and on clean conditioned aggregates in the form of crushed stone and sand, have an increased density, therefore, they have less variation in strength readings both in compression and at stretching [1-4]

Fundamentals of property and compositions management concrete mix and concrete

The choice of the concrete composition following the set research tasks must satisfy the following requirements: 1-the maximum achievable strength on the given starting materials; 2-the required formability, corresponding to the accepted vibration-impact-peristaltic pressing; 3-a given level of dehydration of the concrete mixture, providing a residual W/C, close to the normal density of the cement paste. The accepted conditions are necessary and sufficient when using the physical-analytical method of designing concrete composition. Distinctive features of the method are the use of a large amount of information and the absence of arbitrary coefficients, technological constants, or parameters. The necessary data for the assignment of concrete compositions are determined according to the data of preliminary laboratory experiments, the given technological parameters of mechanisms and equipment, and the design characteristics of concrete and the structure to be formed. For the experimental study, a total of six independent information streams of initial data are used: 1-physical and mechanical properties of the constituents of concrete (Rc, ρc, ρc°, [V/C], рс, γ3, ρshch, γsh, γshch°); 2-laboratory data of tests of raw materials in concrete mix and concrete (a, b, c, Ku, A, B); 3-design characteristics of concrete mix and concrete (Rb, F, W, OK, Zh); 4-characteristics of the product to be concreted (V, h, l, μ); 5-technological characteristics of equipment, mechanisms, and devices (th, tb, TO, t0); 6-the cost per unit volume of raw materials (Sc, Cn, Ssh, Se, Sg). Obviously, the listed volume of initial information comprehensively characterizes the materials used and the conditions for forming the product. The previously developed technological conditions for forming concrete pipes, in addition to the above, require, when assigning the composition of concrete, to take into account the observance of the balance of masses in the concrete mixture and compacted, modified concrete. This should be manifested in checking the equation of absolute volumes for the original and compacted (dewatered) concrete

Integrative approach to designing the content of secondary specialized vocational education

The article discusses the issues of integrated approaches to the design of software content for vocational education. The study was conducted using the method of abstraction, ascent from the abstract to the concrete; logical analysis of scientific literature on the topic of the article; descriptive and diachronic. As a result, the integration of the learning process contributes to comprehensive learning, allows us to develop logical and figurative thinking in equal parts, supports rational and emotional areas of activity and ensures their unity. In conclusion, the need for integration is to bridge the boundaries between fields of science.El artículo analiza los problemas de los enfoques integrados para el diseño de contenido de software para la educación profesional. El estudio se realizó utilizando el método de abstracción, ascenso de lo abstracto a lo concreto; análisis lógico de literatura científica sobre el tema del artículo; descriptivo y diacrónico. Como resultado, la integración del proceso de aprendizaje contribuye al aprendizaje integral, nos permite desarrollar el pensamiento lógico y figurado en partes iguales, apoya áreas de actividades racionales y emocionales y asegura su unidad. En conclusión, la necesidad de integración es cerrar los límites entre los campos de la ciencia