This article analyzes the best practices of choosing the
optimal policy for replacement of vehicle fleet. The
problem of replacement equipment was revealed. For
each of these methods we gave objective function,
constraints. We have found the best method of optimal
plan of replacing the vehicle fleet in the company,
allowing us to obtain accurate, economically viable
new equipment purchase plan during a certain period.
We have selected a number of important factors that
influence the choice of payment method replacement
policy and built PivotTable methods and factors. The
selected as part of the research methodology will
significantly reduce the labor and time, which will lead
to an increase in productivity of the enterprise as a
whole. The article gives a practical justification for the
need to address the problem of choosing the optimal
policy of replacing the vehicle fleet
Stages of connecting metal and glass process are elucidated
in the article, the hypothesis about possibility
of wide use of glass as hydropneumatic cylinders
working surface is viewed, possibility of use of the 3D
technology in the considered process is estimated
For different industries, there was a need of creation new equipment and mechanisms with enhanced characteristics. Special requirements are imposed to energetic and mass-dimensional indices of systems of electric drives as one of the main components of such devices. Mass-dimensional and energetic indices due to constructional features and the used management system will allow improving the use of special or controlled asynchronous cascade systems of an electric actuator of axial construction. One of the main difficulties is simulation and design of special systems of the electric drive. In the article, we offer a new approach to determination of magnetic model parameters of the stator of a component of a controlled asynchronous cascade electric actuator of axial construction
Now in different branches of the industry there is a need for the new equipment and mechanisms with the seized characteristics. Special requirements are shown to energetic and mass-dimensional indices of systems of electric drives as one of the main components of such devices. Mass-dimensional and energetic indices due to constructional features and the used management system will allow improving use of special or controlled asynchronous cascade systems of an electric actuator of cylindrical construction. One of the main difficulties is simulation and design of special systems of the electric drive. In this article, a new approach to determination of magnetic model parameters of the stator of a component of the controlled asynchronous cascade electrical drive of cylindrical construction is offered
In the article on example of the Department of basements and foundations of Kuban State Agrarian University (KubSAU), we have discussed issues of preparation of final qualifying works for bachelors and masters in “Construction” specialty. The final qualifying work (the diploma project) is performed by bachelor at the final stage of study. Final stage (diploma designing) provides individual work of undergraduate students on solving tasks under the guidance of experienced teachers and leading construction industry professionals invited to lead to the degree designing. The general organization of bachelors’ diploma projects entrusted to the Deanery of Faculty of Civil Engineering and graduate departments. Topics of diploma projects are defined by graduating department after passing the Bachelor pre-degree practice. The article gives examples of the diploma projects in the Department of basements and foundations, as well as it shows the composition of the department that prepare bachelors, the procedure for appointing the heads and consultants.
Separately, the article describes the organization of the preparation of master’s dissertations for post-graduate students who study at the Department of basements and foundations. Education of masters is conducted on two master programs: "Maintenance and reconstruction of buildings and structures", "Theory and Design of Buildings and Structures". For performing master's dissertation research a supervisor has to be selected from among the doctors and candidates of sciences. The article presents the main directions of masters’ dissertations, their exemplary topics, as well as performs stages, terms and procedure of public protection
The article describes an approach to managing maintenance crews using ITIL methodology and principles of reinforcement learning
For explaining the regulatory mechanisms of biological the methods of classical biology, chemistry and physics are clearly inadequate, since the structure and function of these mechanisms are determined by the motion of the electron clouds in conjugated molecules. This "movement" can lead eventually to a complex organization called life only if they are subject to certain static laws and, therefore, may eventually be known in all the complexity of their relationships. Biological objects, resulting in the evolution of the environment, are like a part of that environment. Information stored in the seed, based in its deployment on energy and material resources of the environment. Moreover, in the process of development body derives more information from the environment. Nature has the extreme complexity and diversity. Examples include a huge variety of organisms, the complexity of atomic processes, the structure of the solar system and the stellar galaxies. There are four types of different interactions with the help of which we describe all physical phenomena. Today, it seems to us that all the various manifestations of the nature of elementary particles are reduced to the action between them of these four kinds of forces. The most famous of these are the gravitational Zion and electromagnetic forces, which are directly manifested in the world around us. Gravity allows us to stay on the Earth and allows planets to stay in their orbits. Electromagnetic interactions of electrons inside atoms and molecules cause all known chemical and physical properties of ordinary solids, liquids and gases and, in addition, are the basis of all of the processes occurring in living organisms. Research in the field of magneto proved that the biological systems are selectively susceptible to the action of electromagnetic fields as a function of their intensity, exposure time and frequency
While mechanical harvesting of potatoes, about
20-40% of the tubers get damages. Dynamic
loads, injuries of the tubers, causing internal
damage – which is browning of the flesh of the tuber, which occurs in the process of its storage.
At the same time, ways to express control of
damage to potato tubers will allow both
reducing damage during harvest, and promptly
sending damaged potatoes for recycling before
the results of mechanical stress for the tubers
during harvesting. The definition of internal
damage to the potatoes is possible because of
the analysis of the different elasticity of the
tissues of damaged and undamaged tubers. The
value of overpressure of the device is chosen
such way that during deformation of tubers
there mainly has been compression of the
damaged tissues of the tuber, with the least
turgor. The degree of damage of samples of
tubers is determined by the ratio of the volume
of damaged tissues of tubers to the total volume
of the sample. We have given the mechanical
properties of tissues of tubers, fruits and root
vegetables, their structure, dimensional
characteristics, it can be assumed that the use of
this method of determining internal damage
possible for apples, carrots, beets and harvest of
other crops. Use of damage control will enable
timely identification of hidden damage and
make it possible to eliminate their causes,
which lead to increase loss products
The method for database informational structure development in timetable scheduling automatic system of high school is reviewed in this article. The algorithm for informational elements ordering on hierarchy levels is described in this work
One of the important issues in the design of static
converters of electric power, i.e. rectifiers and
inverters, is to calculate the parameters of the output
and the input filters. Output filters are designed to
improve the quality of output voltage of inverters, and
input filters are created to reduce ripple of the input
voltage of the converter that occur when commuting
power semiconductor devices, and smoothing
fluctuations of the current consumed from the power
supply. The complexity of analytical description of
the harmonic composition of the output and the input
of the voltage rectifiers and inverters makes it
difficult to develop some accurate methods for
calculating the parameters of their filters. At the same
time, considering the discreteness of the number of
possible parameters of real elements of the filter, the
practical value of such techniques with a high analysis
accuracy of the harmonic components is negligible. In
this article, we suggest the technique of the simplified
calculation of output and input filters for passive LC
filters rectifiers and inverters. At the same time, the
practice of mathematical modeling and design of
transducers has shown that the calculations of the
filter parameters for rectifiers and inverters are not
significantly different from each other. Therefore, the
analytical expressions for calculation of the filter
parameters of rectifier used ripple coefficient, and if
necessary the calculation of the filters of the inverter,
instead of the pulse number in the formula can be
substituted with the value of the harmonic; in
addition, we have also taken into account the value of
the load power factor