Scientific Journal of KubSAU

The choice of the most optimal composition of aggregates for tillage for work in a certain economy is very difficult from many determined and casual factors. In connection with what, it is suggested to conduct researches with the use of quantificational and quantifier algebra logic. Also we need minimum influences on ecology, being characterized as a predicate of "minimum of expenses on indemnification of erosive losses of soil". For the agricultural technique of Russia, countries of the CIS and distant foreignness with the well-known norms of making (by the productivity) and expense of fuel imitation modeling is applied, on the method of Monte Carlo (Monte - Carlo Simulation), allowing to build a mathematical model for prognostication of necessary amount of aggregates at different normative agroterms with corresponding damages

The equation describing the whole combination of actions with bees in hives during spring development is obtained. The formula for coefficient of degree of bee colony development during exact period is obtained. The whole combination of electrical technological actions let to increase the bee colony spring development by two times. The counting of the bee keeping labor profitability for the case of application of electrical technologies during winter and spring is carried out. Application of electrical technologies increases the profitability of honey production by two times. The competitiveness of honey bee products could be increased by the way of application of the meanings of efficient electrical technologies targeted onto increasing of honey productivity of bees, increasing of eco-purity of sanitary actions and decreasing of labor content of main technological actions. Using these calculations, you can create an automated climate control system in the hive. To do this, you must also take control laws and apply the appropriate sensors, microcontrollers and executive bodies. All of this will go to the next - higher level of profitability of beekeeping that rose-sieves produced pro-competitive products. To automate the most labor-intensive processes of beekeeping. These processes are pumping honey and labor costs beekeepers to carry out veterinary and sanitary measures

One of contemporary challenge at the educational system is a need to develop new methods and approaches enhancing quality of graduates. Transformations in our country towards market economy make us to compete with own products not only at the level of enterprises, but educational institutions as well. The article shows that the elements of the Theory of Automation are applicable to the quality analysis of the accomplishment of graduates. Issuing of latest regulation documents also supports this hypothesis and encourages the further development of mentioned methodology. In the article, special attention is paid to the funds of assessment tools because of their quality depends on the adequacy and accuracy of the information received further action of the education system. It is also shown that it is necessary to create a situation in which the student can demonstrate skills obtained, which can manifest itself not only in the classroom. Individual competence may appear in extracurricular activities, and evaluate their means can not only leading teachers, and supervisors in the dormitories, responsible for educational work, SRWS leaders, heads of educational and industrial practices, etc. The article describes the method of calculating the total level of formation of competence

The article dwells on the features of the calculation of a branched electric circuit containing one or more asynchronous short-circuited electric motors operating with a load which depends on the parameters of the electric circuit itself. A method for solving the problem of calculating a circuit on the basis of the mathematical perturbation method is proposed

In agriculture, the high reliability of electricity supply is necessary because of its main feature production is associated with biological objects. The change in the state parameters can lead to a sharp decrease in the productivity of the biological system or, in general, to the death of it. The following enterprises are particularly critical to the reliability of power supply: dairy farms, hothouse complexes, incubators, grain storage sites, finished products and much more. The article presents: models of failure of switchable busbar, models of failure of supply buses; formulas for the calculation of reliability indicators, the calculated values of the probabilities of failure-free operation of individual elements, analysis of the values obtained, conclusions were made on the models presented and suggestions were made for introduction into production, energy conservation was associated with reliability of electrical installations

The article deals with the reliability of the functioning of the equipment of the power supply substation, and the determination of the probability of uninterrupted supply of electricity to consumers. The following are presented: models of failures of separators, models of short-circuit failures, models of failures of disconnectors. Two statistical series for sudden and gradual failures are singled out. The reliability theory is shown as the main distribution of fail-safe time for sudden failures. The conclusions on the presented models are made and the suggestions on introduction into production are given. According to the presented models, it is possible to judge the reliability of the station's operation, which is necessary for implementing measures to improve the reliability of electricity supply in network companies

The reliability of work of the technical systems significantly influences the technological losses of manufacture process. During the counting the availability ratio of the technical system it is recommended to take into the consideration implicit as well as evident breakdowns of all separate components of the whole object. There is a formula for counting technological losses depending on the availability ratio of technical object. Similar formulas for counting losses proceeding of atmosphere and water resources pollution, pollution of soils with hard matters are obtained. Introduced identities bring together reliability of the technical systems and separate components of ecological losses

The article deals with the results of research of acoustic and magnetic field influence on conductivity and pH value of hydroponic solution. For carrying out researches in this area the hypothesis of possibility of nutrient solution influence on ions by means of an acoustic and magnetic field is set up. A laboratory scale plant was constructed for a pilot study of the hypothesis. The solution was moved in the tube passing through a ferrite ring with winding. Thus, the solution was exposed to the influence of acoustic and magnetic field. The object of research was hydroponic solution of (NH4)2SO4; (NH4)2HPO4; K2SO4; Ca(NO3)2; MgSO4 in water having adjusted concentration and acidity. The solution was taken from the tank of laboratory scale plant by means of the pump, passed through the working area of the acoustic and magnetic device, filter, and then was poured into the tank, from which the sample for pH level changing was taken. The pH value was measured at the temperature of 22С by using electronic pH-meter KL-009(1)A. For control of instrument readings acidity was tested by universal test-paper. The initial pH value of solution made 5. As a result of acoustic and magnetic treatment of solution pH value of hydroponic solution increased from 6 to 6.9. The results show the possibility of pH value correction by small energy input

The article presents an estimation of productivity in Russian beekeeping, honey pitching profitability calculation, the results of finding the optimal solution for the first level of automation and mechanization of operations

The article is devoted to increasing beekeeping’s earning capacity with rigging and automation of technological processes. Winter is the most complicated and critical period in beekeeping. It influences on further productivity of bee colony. Winter period has specificity – bees are gathering in winter cluster and sustaining temperature in 24…32 °С range inside. This temperature is depending on fluctuation of outside air temperature. For passing winter without complication electric heating is used. Cluster geometry in winter is changing constantly and for optimal regime of electric heating we need to take it into account. Additionally, bees’ activity changing beehive’s microclimate and it’s important to know when beehive’s microclimate adaptive control system is developed. Conducted researches allow us to get basic equations which characterizes microclimate with taking into account of winter cluster’s variable geometry. The equations establish linkage basic parameters of beehive, winter cluster, internal air between outdoor air. Simulation results may be used for adaptive heating control system programming. Additionally, it may be used in special-purpose software for beehive’s microclimate simulation