The goal of the study is to research experimentally a
pseudo-noise sequence acquisition method for
multicarrier communication systems of MC-DSCDMA,
that allows low hardware requirements and
able to operate in low quality channels. The way of
achieving this lies in using a specially developed
computer model of algorithm in Simulink. The
achieved results have shown high efficiency of the
considered acquisition method in contrast to sequential
search method. The proposed algorithm can be used in
multicarrier systems for acquisition of aperiodic
pseudo-noise sequences in wireless public networks
and in military communication networks
We have designed and offered a voltage quality
analyzer that allows you defining relative deviation of
voltage, voltage unbalance factors at zero and negative
sequence. The device differs from the existing ones
with simple design and circuit solutions; it has low
price and the ability to conduct a continuous
monitoring of quality indicators of electric energy
It is shown that for preparation of the concentrated forages it is expedient to use the vibration principle of mixing with use of big amplitudes of movements of components of forages from 10 to 500 mm. and more which can be done when using relative screw drums at the expense of the flat or curvilinear elements which are discretely located on perimeter of a relative screw drum placed on perimeter at an angle not only to an axis of rotation of a relative screw drum, but also to each other, the difficult spatial movement with a big amplitude of movements from 10 to 500 mm is reported to particles of components of forages. Possibility of creation of resource-saving technologies and the equipment for mixing of components of forages is shown. Earlier it was limited to low intensity of the proceeding processes and localization in a limited zone, and also small sizes of amplitudes of fluctuations in known designs. In the offered designs of the equipment for mixing of components of forages the movement of particles of components of forages is provided with an original design of working bodies – the relative screw drums making only a rotary motion round own axis. The difficult spatial movement with a big amplitude from 10 to 500 mm and more, is reported to particles of components of forages by walls of a relative screw drum of various standard sizes and configurations which becomes complicated screw lines and screw surfaces directed towards to each other on perimeter of a screw drum therefore process duration ranging from 1,5 min. till 1.75 min. is sufficient for high-quality mixing of particles of components of forages in a relative screw drum
The article contains the estimation of effectiveness in the use of by-products, cameline-seed oil and amaranth flour in the meat by-products in the dough. By-products were used for the purpose of the expansion of the assortment of the meat semi-finished products in the dough. Amaranth flour was introduced for the purpose of an improvement in the organoleptic and functional- technological characteristics of the stuffing and an increase in the quantity of protein. Cameline-seed oil was added for the purpose of the enrichment of product by omega- acids. As the experimental models we have made pelmeni (ravioli), the relationship of dough and stuffing in which comprised 1:1. In the prototypes the flour from the amaranth was introduced in quantity 5, 10 and 15%. Cameline-seed oil was introduced in quantity 2%. Models with the amaranth flour in quantity 5% had the smaller output of product and the insufficient moisture-binding ability. Models with the content of flour from the amaranth in quantity 15% had the strong smell of plant component. Experimental model with a quantity of amaranth flour 10% on the organoleptic characteristic proved to be best, and there composition was acknowledged most optimum. The studies of the experimental models of meat semi-finished products in the dough showed that the use of amaranth flour contributes to an increase in the moisture-binding ability of stuffing, to an increase in the output of product, to an increase in the content of protein and irreplaceable amino acids. According to the results of all conducted studies is made the conclusion that flour amaranth can be used as the moisture-binding component for making of meat semi-finished products in the dough
Nowadays the high level of electricity losses is one of the most important issues of the energy industry in the Russian Federation recognized at the state level. According to many sources, one of the activities that contribute to reduce energy losses, is their planning, an important component of which is the prediction of electricity losses on the basis of retrospective information. The highest percentage of technical losses of electricity is accounted for distribution network with a voltage range 0,4-35 kV. In this regard, the most productive activity is forecast construction namely of this component of power losses. According to some features of the regarded value (electricity losses) the most effective activity for its forecasting is using methods with artificial intelligence elements. One of these methods, having a number of important advantages, is forecasting fuzzy time series. This technique is widely consecrated in foreign publications, but did not find sufficient popularity in our country. This article analyzes the existing models of forecasting fuzzy time series on the basis of which proposals for their improvement and adaptation in order to predict the loss of electricity are made; designed model of multivariate fuzzy time series forecasting of energy losses is given
In the modern conditions of dynamic development of the market system, the economy, feeling polynomial enthusiasm and recessions, demands external influence, regulation, management. It isn't possible to realize an effective control system of economy without understanding of a consequence. The regulating structure represented by the state needs an effective system of the support of decision-making allowing to estimate the consequences of the made decisions before their direct realization. Use of modern methods of complex estimation for modeling of market system on the basis of trees of criteria and matrixes of convolution allows forming a static market model in the form of the functions of sensitivity interpreted as curves of supply and demand. However, the questions of creation of dynamic market system on the basis of these mechanisms weren't discussed so far. In this article the questions of possibility of modeling of dynamics of the market system built on the basis of mechanisms of complex estimation are discussed. Relevance of the chosen method depends on the possibility of preliminary formation of possible outcomes of an event in the form of the count on definition further of probability of transition to each of states on the basis of a complex assessment of the individual of "advantage" of such transition. An additional benefit of such approach is that fact that when forming market system from some contingent of participants with different behavior models for each of them there is an opportunity to create the scenario, and when receiving at a stage of modeling of result to reconsider the new created structure of structure of society
Currently, the problem of using a "client-server" technology for database is up-to-date. Among its advantages it has a high degree of security, the ability to work with multimedia and non-standard data, simple tastes to the hardware power client stations, the territorial independence of work in both local and wide area networks. The article presents the concept and describes the implementation of a client-server information system configuration databases based on plug-ins that enable flexible, fast and efficient to make changes to an existing application for working with databases. This approach solves the problem of using one program to connect to multiple databases
The article describes the modern problem of automatic flame control of industrial installations. The research of this problem is usually begun with the analysis of emergency mode of thermal generating units, divergence of parameters burning processes from accepted value. The most unfavorable factor for trouble-free operation of industrial thermal plants is the cyclical nature of the load changes energy-consuming devices with deep and rapid changes. The paper presents a study of physical factors affecting the stability of combustion in furnaces, the violation of which leads to abnormal flameout. It helps to equip thermal units with effective automatic protection
The article describes the subsystem of workflow of the department at the institute “The calculation of teaching load”. As the process of calculation of teaching load is very complicated it has become necessary to make this process automatic. The mental card was developed where we can see the structure of the program for calculating teaching load. The subsystem has simple and understandable interface. The results of its work are represented in the form of filled blanks adopted by the academy in EXCEL. The created subsystem makes easier the teaching process of the department at the academy very much
The calculation of pumping equipment and piping network parameters is presented. The method of cutting impeller pump diameter for optimal performance of pump unit with piping system on efficiency value is shown. The case of operating the distribution network and pumping station with three pump units D1250-25 is considered. Procedure of construction of loss-of-head curves in pipes, determination of the actual operating parameters of a single pump unit, selection of pump impeller diameter for essentials is indicated. Four points for graphing such curves are presented. According to the first point the whole network is divided into sections with suction, pressure main pipelines and pipelines with changing water flow compared with the previous ones. The second point involves definition of the electrical resistivity of each site. The resistance of network analyzer is determined in the third point, the loss-of -head of the whole network is determined in the fourth point. The article presents the scheme of pumping station with three pump units connected in parallel and a distribution network (Figure1), loss-of-head curves in pipes regardless the number of working pumps (Figure 2), the order of constructing three loss-of-head curves with operating one, two and three pumps with normal and cut pump impeller diameter (Figure 3 ), the order of determination of the actual parameters of pump work characteristics according to combined characteristics of normal and cut pump impeller diameter ( Figure 4) In conclusion, it is stated that the question of proper definition of actual parameters of pumps and the support of these parameters in optimal mode remains open due to the lack of proper methods of constructing loss-of-head curves pipeline. Every similar calculation is preliminary and should be carried out in field conditions