Creation of new types of special electric actuators for the oil and gas industry implies development of new approaches to simulation, design of the considered types of electric actuators. In addition, it requires development of new algorithms for creation of a complex of application programs of computer-aided design of special electric actuators. As process of simulation is quite labor consuming, it is offered to realize it gradually. In this article, the question of mathematical simulation of special electric actuators for the equipment of oil and gas branch using methods of electromagnetic conversion of energy is considered. Results of mathematical simulation were realized in the form of the program products, which are a part of system of computer-aided design
The influence of auto-displacement in a resonancetunnel
diode (RTD) on the dynamic range of
amplifiers on these diodes is considered in the
article. The amplification at resonance frequency is
considered and the influence of higher harmonics
is not taken into account, since they do not create a
significant voltage drop at the nonlinear resistance
of the diode. It is assumed that the gain will be
sufficiently large, and then the nature of the
dependence of the gain factors on the degree of
regeneration will be the same for amplifiers "per
pass" and "reflection". This allows us to consider
the problem for both types of amplifiers on the
RTD. The types of amplitude characteristics ,
which are possible for the RTD amplifier, are
considered. The dependences of the parameter
determining the dynamic range of the amplifier on
the position of the operating point for several
values of the product of the resistance on the direct
current of the supply circuit are calculated for the
value of the modulus of the maximum negative
conductivity of the tunnel gap RG max. For each
value of RG max for given parameters, you can
determine the position of the operating point,
which provides the specified amplifier mode.
Dependences of the value of the dynamic range are
constructed with allowance for auto-displacement
and in the absence of auto-displacement for two
values of the degree of regeneration. Taking into
account autosplacement, two possible types of
amplitude characteristics and boundaries of their
existence were revealed. For these two types of
amplitude characteristics, expressions were
obtained that determine the dynamic range of the
amplifier
The ways of improving the work of food enterprises during processing of agricultural raw materials on the basis of a system analysis of the durations of technological operations are considered. The basic mathematical models of technological processes have been analyzed and the possibility of using unified technological operations to predict the time of completion of work has been shown for processing various pairs of raw materials. It is established that the construction of mathematical models of technological processes of processing of agricultural raw materials should be based on using the potential of transfer of the target component between isopotential surfaces. This allows not only to unify the created models of technological processes, but also to significantly increase their extrapolating ability to estimate the durations of technological operations
The article presents a study of types of expert systems
(ES) and methods of their construction. We have
developed principles of functioning and the
architecture of dynamic ES for social protection that
can modify its behavior depending on the changes in
the subject area and in specified scripts of functioning
Car license plates recognition problem is one of the
typical tasks of computer vision. Video surveillance
software usually provides license plates recognition
function. Meanwhile, there are many approaches to
solve this problem, where template-based methods are
the most common. Such methods providing predictable
and short enough execution time, and little percent
of mistakes. However, such methods are far less effective
in case there is a need to recognize car’s license
plate, which may be located in unpredictable place,
typed in undefined font and on non-standard background,
or without strict formatting. For example,
USA car license plates. One of the methods to increase
effectiveness and quality of such license plates recognition
is to use neural networks. It is assumed, that
neural networks usage can significantly increase
recognition quality. Nevertheless, neural networks usage
entails difficulties of it’s training, and often becomes
less efficient as template-based methods usage.
This article discusses probability of usage of convolutional
neural network, which was trained using MNIST
(Mixed National Institute of Standards and Technology)
database. This article is a review of usage of templates
and neural networks for car’s license plate
recognition in terms of quality, performance and complexity
of the usage
Based on the analysis of modern scientific approaches
to the construction of complex information-measuring
systems, we have formulated a circuit solutions model
of a distributed system of control of parameters of soil,
the implementation of which will allow to build
systems in small businesses
The article is devoted to the use of complex computer programs called "Automated verification and final practice on determination of level of professional readiness of police officers to perform their tasks" - ASC "CONTROL" developed with the Delphe programming language. It describes the basic techniques of the automated testing with the use of the complex algorithms training testing database to use, as well as methods of reporting for testing. We describe how to work with the software modules of "Control" and "Analysis". The first is designed to create and edit a test database and processing of results of testing of the subjects. It is only used by the originator of the test and inspection and is not available for testing. The second module is available to everyone because it provides testing. It is implemented as a separate computer and local network. The number of test, at the same time is virtually unlimited. We clearly articulate the features of the use of the software complex, algorithms of creation of new test tasks, describe the setting options of the test database in detail, technology editing sections of the test, definition of assessment criteria, and describe the technologies of testing subjects. The Complex of computer programs of ASC "CONTROL" has passed the technical testing and successfully used in educational process of chair of computer technologies and systems of Kuban state agrarian University and the determination of the level of knowledge of cadets and police officers in Krasnodar University of MIA of Russia. In this regard, this work will be useful to drafters of test databases in this software environment
It is estimated that (85-95%) of the electric motor
failures occur due to damage to the stator winding. In
this case, more than 90% of damage are because of
interturn short circuits. Short circuits in stator windings
of stand-alone asynchronous generator change the base
magnetic flux incidentally, so the probability of its long
work with such kind of damage is great. A latent
failure, existing as a loop closure, significantly reduces
the reliability of the generator as a backup power
source. Now sensitive protections of asynchronous
generators do not exist, since it is believed that in the
case of short circuits (short circuit), the generator loses
its excitation, and protection is not required for it.
Identification of information signs of short-circuit
currents in the stator winding of an asynchronous
generator makes it possible to develop relay protection.
The main principle of detection of stokes closures in
the stator winding of an asynchronous electric motor is
the measurement of the emerging asymmetry of the
stator currents. It has been established that in the case
of short-circuit faults, the asymmetry of the currents
and voltages is not large and comparable to the
asymmetry in the AAG load circuit. This does not
allow performing a protection that reacts to this
asymmetry. You can also say about changing the
harmonic spectrum of currents and voltages. To build
protection, it is necessary to use highly sensitive
circuits for detecting the asymmetry of a three-phase
system of currents and voltages, as well as distortion of
the shape of currents and voltages, for example, by
harmonic analysis. Do not exclude the possibility of
using other protection devices, such as reacting the
vibration of the case of an induction generator in the
event of damage to the stator winding
One of perspective variants of development of the
meat industry can become the production of
foodstuffs from untraditional kinds of the meat raw
materials such as the rabbit meat, which has a high
protein content with a full number of essential amino
acids, broad spectra of the mineral substances and
vitamins and reduced fat content. Therefore, a
demand on the rabbit meat has been increased
significantly in the past years. Rabbit meat is widely
used in various culinary dishes of the dietary
nutrition. Rabbit meat is used in limited scales for
production of sausages. The production of the
delicacy sterling foodstuffs from the rabbit meat, that
are capable for long-term storage, is almost not
developed. The regulated requirements for quality of
rolls that are included in Technical Conditions are set
up in accordance with the developed recipe and
technology of production of the smoked-boiled rolls
from the rabbit meat. All the foodstuff samples gained
high scores on the organoleptic estimation. The
foodstuffs satisfy the requirements for chemical
composition: mass fraction of protein – no less than
20%, mass fraction of fat – no more than 25%, mass
fraction of moisture – no more than 65%. The
developed delicacy foodstuffs have a high nutritional
and biological value
The article offers a method of details finishing and cleanup processing based on the details and working environment granules mass hashing in combination with the target transporting movement from loading to unloading. Such combination is provided by means of technological process in which the movements are carried out at the expense of the working body executed in the form of a complex screw rotor with the multidirectional screw surfaces formed by flat elements. Four screw rotors designs and methods of their assembly as well as the recommendation on the use of screw rotors are shown: "The movement of the processed details and particles of a working environment is the most complex and infinitely various among the I class screw rotors and the most elementary and uniform among the IV class screw rotors". The practice and experimental control of the details finishing technological process introduction efficiency in screw rotors have shown that for the considered case productivity of, for example, agnail removal increases tens of times. It is reached not only at the expense of the possibility of continuous processing provision in screw rotors, but also due to significant increase in amplitudes of low-frequency fluctuations which are reported to loading masses by the screw rotors machines located at different angles to each other and to screw rotor rotation axis