We have conducted experimental and analytical
studies showing the relationship of constant and pulse
forms of current sedimentation on the physicochemical
properties of chrome coatings: adhesion
strength to the substrate, residual stress, fatigue life,
elongation and contraction, yield stress, and
endurance. We have shown the methods and modes
of use of dilute electrolyte of chromium plating with
organic additives, is capable of applying a chrome
coating on parts of agricultural machines, surpassing
the properties of the coatings obtained from
electrolytes that are recommended by the GOST
standards. The proposed hardening chemical-thermal
coating technology for chromium in the manufacture
and repairing of worn parts of agricultural machinery
(rods of hydraulic cylinders, journals of crankshafts,
spools, parts, gearboxes and transmissions, etc.),
identifies the consumption of additives modifiers,
proposed methods for their determination, confirmed
by patents for inventions. The proposed technology
of worn-out surfaces of parts of agricultural
machinery of layer-block structure of the chromium
coatings with improved properties. The influence of
modifying organic additives on the structure of the
intermediate surface film of colloidal trivalent
chromium compounds, which in combination with
the parameters of the bipolar pulse current allows you
to specifically adjust the physical and mechanical
properties of crystals of the deposited chromium
layer with a grid of cracks, and without them for the
required operating conditions of dry friction or oil environments, which increases the durability of the
parts during use. The increase in yield, at the current
6-8 %, to 4 times reduces the degree of
hydrogenation of the restored details, up to 3 times
reduces internal friction, roughness, improves the
limits of strength, toughness, elongation and
contraction, increases corrosion resistance up to 3
times, obtained chromium coatings
The article presents the analyzes results of the
deconstructive approach to the process of garment
designing, which consists in structural defects
modeling; it develops the systematization of projected
design effects based on the study of modeling defects,
analysis of their appearance and methods of
elimination. The purpose of the research is the further
development of designing methodology of structural
defects in sewing products
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
Currently, there is increasingly reduced number of the sites convenient for construction. In this regard
there is a question of development of new
territories, for various reasons which were earlier
considered economically unprofitable or unsuitable
for construction. Often, for construction in the
mountain area it is necessary to carry out
construction of objects in landslide territories.
However, landslide processes constitute big health
hazard and lives of people and also safety of
buildings and constructions. The main objective of
engineers when performing design and exploration
work on landslide territories is the determination of
stability of slopes and size of landslide pressure
from soil and also identification of the most
dangerous combination of loadings which can
demand design and construction of a construction
against landslide of landslide protection structures
with significant load-bearing capacity. The research
presented in article allows to define the most
dangerous loads affecting the stability of the slope
and also of the selection of a protective construction
(against landslide). Dependences of change of
landslide pressure and coefficient of stability of a
slope are received from action of various loadings
(both static, and dynamic)
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
The main application of tractors is in agriculture. The share of imports continues to grow in the structure of the agricultural machinery market. In recent years, many foreign tractors and agricultural machines, including John Deere, have been delivered to the fields of the Tyumen region. The rates of productivity and fuel-lubricants consumption for the agro-climatic conditions of the Tyumen region are not available for all tractors with agricultural machines. Therefore, for agricultural producers, their establishment becomes urgent. On the fields of agricultural enterprises of the Tyumen region, studies were conducted to establish the norms for fuel consumption and productivity of John Deere tractors with agricultural machines. The article presents the results of the study. For example, the productivity of a tractor in the «Malyshenskoye» conditions for a field located at a distance of 5-6 km and an average run length of 1,300 m can be in the range of 5.8-6.0 ha / h. Taking into account the natural and climatic conditions of the Tyumen region and the different physicomechanical composition of the soils, as well as the configuration of the fields and the run length during tillage, data were obtained of basic lubricants consumption. Recommendations on the use of fuel-lubricants consumption rates of modern tractors in the performance of various technological operations in agriculture will make it much easier to plan and calculate the operating costs of tractors with agricultural machines
The article discusses the model of a neuron with
memory. The proposed model is formed based on the
model of the dynamic neuron. The proposed solutions
allow to efficiently model dynamic processes and to
provide a two-level scheme for evolution of neural
networks. The first level of evolution is achieved using
traditional neuro-evolution models that allow you to
create or to modify basic network settings. The second
level allows you to track the history of the
development process. The article presents a formal
description of the proposed models and algorithms of
functioning of the network, is the rationale for the use
of the proposed models
The article focuses on the utilization of rice straw by chopping and splitting with a post-blade cylinder. The amount of rice production and rice straw in the Krasnodar region are specified in the article, as well as methods of utilization of non-grain part of rice harvest of rice, namely, burning in the field and use of rice straw as an organic fertilizer. The article describes a research on determination of the degree of rice straw humification under natural conditions at different parameters of its crushing and patching. According to the experimental results there was constructed a graph of the degree of rice straw humification by variants of the experiment. There was offered the projected constructive scheme of mobile trailer rice straw crusher from rolls in the article. The main results which were obtained to the present moment were shown in conclusions
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 work is done in scientific and practical directions
for minimization of power losses in transmission of
electricity to local distribution networks between the
actors of the energy (producers and consumers) of
energy-saving technologies focused on technological
activities such as modernization and reconstruction of
networks. Quite often in various circuits of power
systems, it is advisable to transfer energy and its power
through intermediate (transit) nodes. Structural
changes in the electricity sector, at present, are mainly
associated with the introduction of market relations
between the subjects of energy exchange; therefore, in
this work special attention is paid to the problem of
calculating the power losses, as it is nonlinearly
dependent on the power at the nodes and branches of a
network. It should be noted that the nodes in problems
transit capacity could be both sources and consumers.
The latter necessitated the need for search of possible
ways to reduce transportation losses of energy due to
both the improvement and optimization of distribution
networks and through the use of intermediate transit
nodes. It follows that the transportation problem in this formulation is more General and expands the
possibilities of optimization of power losses for the
local subsystems of the energy clusters. The work is
composed of the transport matrix for solving problems
transit capacity, where the algorithm taking into
account the distinctive features of which consist in the
use of continuous numbering of sources and
consumers in the matrix, and any node can be a transit
country. The transit capacity ii-th node Zii=0, and the
dimension of the matrix in contrast to the previously
considered tasks has (n+m) (n+m) and it remains
square as all the transport problems of linear
programming. Transit variables Xii are included in the
solution of the problem with a minus sign, and all
transit variables are considered basic. From the above
example in the work of a number of branches of a
network is minimal, which significantly reduces the
cost of building and maintaining the network, and the
solver minimizes the power loss between the subjects
of energy exchange and, as a result to savings from the
standpoint of cost of construction of the network and
the management of overflows of energy in it