Currently, there are widely used combined (hybrid)
power systems in the world, made using renewable
and conventional sources of energy. The article
discusses a typical structural scheme of a combined
system of electricity supply; it also shows the design
and the characteristics of three types of structural
circuit design of combined power systems and their
main advantages and disadvantages. Peculiarities of
the choice and calculation of parameters of the basic
functional elements of the combined system have
been presented. This study describes main
characteristics of solar batteries and provides
analytical expressions for the calculation of their
main parameters. The main characteristics of
batteries and the peculiarities of calculation of the
capacity of storage batteries operating in autonomous
systems have been listed. The features of selection of
voltage inverters have shown that in addition to the
nominal input and output voltage it is necessary to
consider other characteristics that influence the work
of autonomous power supply systems. It has been
shown when it is desirable to use electromechanical
generators to supply autonomous consumers. The
types of structural solutions and the choice of the
basic functional elements of combined power
systems will increase the efficiency of their design
An algorithm for obtaining a complex of mathematical
models of electromechanical devices, which can then
be formalized and implemented in software, is
proposed and described. Until recently, the
implementation of this algorithm was possible only
with the manual derivation of all expressions, which
significantly hampered the work of researchers. The
appearance of such programs as Maple, Mathematica
and MathCAD provided the possibility to automate the
process of obtaining analytical calculations that allows
calculating any modes of any types of
electromechanical devices, reduces the likelihood of
errors and allows you to change accepted assumptions
and designations in the developed models. The choice
of the MathCAD program (in comparison with Maple
and Mathmatica) can be justified by the fact that
MathCAD has the most convenient interface, allowing
not only to perform mathematical calculations, but also
to present the results in ordinary mathematical
notation. The analytical results obtained in MathCAD
can be immediately included in numerical models
In this article, on the basis of phenomenological
consideration of kinetic processes in semiconductors
volume, we have conducted an analysis, in order to
estimate the drift and diffusion components of the
output current for hot carriers in the total output of
the conductivity structure of the chip. The result
revealed amplitude and frequency characteristics of
this component of the conductivity, illustrating a
greater amount of its modulus and phase inversion
near the field-strength values of Ghan effect. This
can be used for designing oscillators of millimeter
range of wavelengths. It is shown that the nonlinear
diffusion component along with the drift is important
for the output conductance of the test specimen
In the article, based on the generalization of long-term
operation of archives of Kuban state University, we
present current regulations and practice of work with
archival documents, pressing questions of transition to
paperless acquisition, storage and use of documentary
resources of the organization. The author conducted a
detailed analysis of the functioning of the archives of
the University taking into account the specifics of the
focus of the organization, defined the main tasks of the
archive. The role of the archive is considered in the
context of source of historical and cultural heritage of
society. We highlighted problems of control and
storage of archival documents, due to the steady
growth of documentary information. Due to the rapid
development of electronic document management
today, the approach to the management of archival
documents is formed based on electronic technologies.
Based on the analysis and the identified problems, the
article presented constructive proposals for the
introduction of an electronic document archive
organization if the interaction with the EDMS and
other systems. To speed up the process of working
with paper media, we might use the technology of
digitization. It is obvious that now, without
implementation of modern information technologies it
is impossible to organize effective accounting, storage
and use of archival documents
The present level of development of power systems,
the need to increase their resources and increased
competition have caused especially true problem of
increasing the efficiency of their operation. The work
is devoted to the justification of the selection and
development of a technique of construction of the
diagnostic model to search for failures in power
objects
Currently operating in autonomous systems of power
supply DC voltages power sources are secondary
sources for operation devices, protection and control
of generators, motors, stabilizers and inverters have
relatively low operational performance. The work
proposes to improve the weight and the size of power
supplies to apply a high frequency link in their
designs. We provide structural designs and the
peculiarities of operation of secondary power sources
with a high frequency link. This article discusses the
fundamental electrical circuits of pulse regulators,
converters based on resonant inverters and
transformers with rotating magnetic field. The use of
resonant inverters in power sources will significantly
improve their weight and overall dimensions. In
addition, the use of secondary sources of supply for
transformers with rotating magnetic field will
simplify their design and reduce the level of
electromagnetic interference generated by
semiconductor devices. The features of operation of
pulsed regulators and prospective structuralschematics
converters discussed in the article,
performed on resonant inverters and transformers
with rotating magnetic field, will increase the
effectiveness of pre-work on the development of
secondary power sources with improved operational
and technical characteristics for devices of operating,
control and protection
Special aspects of grain heap and corn cobs trapping
by modern mechanisms and plants with photoelements
have been considered, also the main ways of their
functional developing are disclosed
The main task in the analysis of time series is the
reconstruction of the dynamical system that generated
this series. To illustrate the nature of the behavior of a
dynamic system described by a nonstationary time
series, a «phase portrait» method is proposed. An
acceptable description of the phase space of a
dynamical system can be obtained if we take instead
of real variables of the system delay vectors
composed of the values of the series at consecutive
moments of time. Restoration in a given class of a
system of differential or difference equations is
performed based on the scalar time series of the
observed process. In order to eliminate the
measurement error and accurately represent the
position of the object in the current, future, or any of
the past moments, it is proposed to apply the Kalman
filter using the known mathematical model of object
dynamics
A mathematical description of the potentials of mass-transfer of hygroscopic materials is possible on the basis of analytical expressions describing sorption and desorption isotherms. Because of the complex nature of the interaction of colloidal capillary-porous materials with moisture, determined by the action other than sorption forces (physical sorption, absorption, chemisorption), capillary condensation forces and osmotic forces, which for different materials are specific and quantitatively different, to date There is no single universal dependence for the analytical description of isotherms of sorption and desorption. Accordingly, there is a wide variety of analytical expressions for the description of isotherms of sorption and desorption. There are many different methods of analytical description of the sorption properties of colloidal capillary-porous materials. All known methods can be divided into two groups: the first should include analytical expressions derived theoretically on the basis of various hypotheses and assumptions, while the second - purely empirical based on the expansion or change in the forms of models of the first group. A large number of equations of equilibrium isotherms are mathematically equivalent. Thus, the method of determining the transport potential based on position allows us to take as a basis for calculation the experimental data on the hygroscopic properties of certain materials and to use the phenomenological approach for the engineering calculation of complex technical devices
The article has examined the application and found the
processes that need to be automated. The advantages
of this method of automation of the technical support
service are considered. Using the unified modeling
language (UML), an information system model is
constructed based on the information received. Using
the developed model, the method of accounting for
channel services and equipment will be automated, as
well as the process of interaction with customers