An overview of research related to the tasks of processing and filtering of signals. Signal is considered as a random process defined by probabilistic characteristics. This article addresses the issues of the history of the development of methods of signal filtering. Recent scientific publications in which the results and the main directions of research in the field of signal processing and filtering are analyzed. Presented material extends the current state of knowledge about the problem.
Keywords: signal, signal filtering, signal processing, stochastic process
The question of an assessment of emission of greenhouse gases from a water complex of housing and communal services is considered. The bundled software, allowing to calculate emission of dioxide of carbon from sewage treatment processes taking into account specific conditions of their course is created. Having defined specific emissions from concrete constructions and stages of transportation and sewage treatment it is possible to supervise and regulate processes of transportation and processing of sewage
Keywords: emission of greenhouse gases, emission of dioxide of carbon, processing of sewage, bundled software, specific emissions
Measurements of partial pressure of carbon dioxide on various treatment facilities of the sewerage are carried out. It is revealed that the partial pressure of carbon dioxide can be an indicator of environmental friendliness of work of treatment facilities. It is offered to apply an indicator of redox process to expeditious control of work of sewer treatment facilities - rH2. The bundled software is developed for simplification of calculations of emission of carbon dioxide
Keywords: emission of greenhouse gases, emission of dioxide of carbon, partial pressure of carbon dioxide, processing of sewage, bundled software
The multi agent model of resources conversion process have rising in 2 direction – simulation of processes and integration with artificial intelligent approaches (expert systems, situation and multi agent simulation) at now. In this work the main attention gave second direction that consist of knowledge representation research and integration with conceptual modeling for application in domain ontologies in decision support systems. The semantic network of multi agent resources conversion process was designed. The intelligent systems design method based on conceptual modeling, multi agent systems, simulation, expert and situation systems, object oriented approach was described. Model and method was implemented in software product BPsim. The software product was implemented in practice tasks.
Keywords: resource conversion process, multi-agent system, intelligent agent, logistic
Results of researches on joint influence of specific pressure of pressing and firing temperature on physico-mechanical properties of laboratory samples on the basis of atyukhtinsky clay raw materials is shown. For the purpose of increase of frost resistance of the burned samples into structure of masses entered a carbonat containing modifying additive in an amount of 5%. For a quantitative assessment of influence of the specified factors on the main indicators of the burned samples researches with application of mathematical planning of experiment and computer processing of results were conducted. Specific pressure of pressing varied within 20±5 MPa, firing temperature – 1000±50 0C. By results of experiment the regression equations are received. It is defined that at increase of value of both varied factors, frost resistance and durability of samples increase, and water absorption – decreases. It is shown that, operating even with two technology factors – the specific pressure of pressing and firing temperature – it is possible to change significantly properties of finished products, and, using the received equations, it is possible to predict future properties of products at a stage of their production.
Keywords: frost resistance, burned sample, modifying additive, specific pressing pressure, firing temperature, mathematical experiment planning
In the article the types of the tubes, used for transportation of hydrocarbon resources on oil and gas fields of West Siberia are considered. the analysis of the statistical data and materials on the corrosion protection in the West-Siberian region is also provided in the article. moreover, the most optimal and effective ways of corrosion protection using the tubes of high corrosion resistance are introduced in the article.
Keywords: hostile environment, incident, corrosion, alloy steel, reliability, refusal, pipeline
Modern trends in the transformation of business structures and forms of inter-firm cooperation have led to the emergence of new organizational and structural solutions allowing businesses to successfully compete in the market, respond quickly to changes in the external environment and internal changes, contributing to the development potential of the business. So in the Russian economic practice, along with established corporate organizational structures and network business structures brand new specific structural forms are gaining popularity, being diversified entrepreneurial business systems, combining features of corporate and network structures, but also having specific characteristics that allow them to be identified as an independent type of structures. This paper discusses the most important parameters influencing the development of a diversified network of entrepreneurial business systems and analyses key characteristics of the data structures to identify their place in the chain of organizational structures evolution
Keywords: organizational evolution, corporate structure, network structure, diversified entrepreneurial structure, business system
Oxide bronzes MxEO3 (M–Na,K; E – W,Mo) are the inorganic materials for technics and chemical technology. Its properties, for example stability in wide interval of temperatures, are of great practical interest (electrodes for fuel elements, electronic apparatuses and others). In this article the results of studies of thermostability of sodium and potassium tungsten and molybdenum bronzes in atmosphere and vacuum condition at the temperatures range 20-1110°C were found. The samples are prepared by electrolysis of melts of sodium and potassium isopolytungstates and molybdates. Dates for bronzes Na0.92WO3 , Na0.68WO3 , Na0.53WO3 , Na0.15MoO3, K0.3MoO3 were characterized by the termogravimetric-differential- thermal analysis (TG-DTA). Regions of stability of Na0.92WO3 : 20-700°C , of MxMoO3 : 300-500°C were founded. Conclusion about correlation of nonstoichiometry of chemical composition of EOx bronzes and oxides, which making important role in formation of less - common metal bronzes structure.
Keywords: oxide alkali bronzes, tungsten, molybdenum, thermostability, nonstoichiometry, thermal analysis
"This review covers various methods of synthesis LaMnO3 ferroics. The general analysis of the solid-phase synthesis reactions methods and wet methods (sol-gel, sorption, co-precipitation) are carred out. The original results of LaMnO3 syntheses from various precursors by means of the in situ method are showned. The advantages and disadvantages of different methods of synthesis are determined. The analysis of synthesis LaMnO3 ferroics published data is shown:
- the structure formation of LaMnO3 in perovskite-type phases occurs at different temperatures, depending on precursors states;
- LaMnO3 perovskite phases differ in symmetry and unit cells parameters at room temperature, depending on the preparation conditions;
- the highest synthesis temperature of LaMnO3 are typical for solid phase reactions method (950-1050 ° C), the lowest - for wet synthesis methods (500-700 ° C);
- the synthesis conditions effect the stoichiometry of LaMnO3 for oxygen content.
Our studies of structure formation processes of LaMnO3 by in situ method are allowed to define the role of precursors states at synthesis of solid phase reactions methods, adsorption, co-precipitation and sol-gel mixtures.
It is determined that in samples prepared by wet chemical methods, the formation processes of LaMnO3 perovskite phases occur at lower temperatures than by solid phase reaction (sol-gel precursor - 500 <T <600 ° C; precursors obtained by coprecipitation and sorption methods - at 600 <T <700 ° C and 700 <T <800 ° C, respectively).
Keywords: ferroics, LaMnO3, X-ray diffraction, solid-phase synthesis, sol-gel synthesis, sorption, co-precipitation
The article presents a brief overview of the results of a study of the compressed elements in our country and abroad, reinforced composite materials. Noted that in Russia this question is poorly understood. Represented a broad research program developed by the Department JBK RSSU aimed to fill these questions.
Keywords: concrete, steel, carbon-fiber reinforcement, test samples, strength, deformability, cracking.
There has been carried out the comparative analysis of the training algorithms of artificial neural networks of perceptron type: genetic, adaptive and hybrid.The comparison revealed that the adaptive algorithm is better coped with the task than the other algorithms. It is better to use the hybrid algorithm to solve the problem with complex target multiextremal function for which the adaptive algorithm is less convenient.
Keywords: artificial neural networks, multilayer perceptron, genetic, adaptive, hybrid algorithm
The role of technical inspection as source of definition of an actual state of protecting designs is considered. Not destroying methods of definition of durability and thermal properties of materials of external walls are resulted. The thermographic method of not destroying control is considered, the list of thermal characteristics which can be defined with its use is presented. Modern requirements to thermal characteristics of external walls are presented and the materials most often meeting in protecting designs are considered. It is considered as a possible variant of increase of thermal properties of protecting designs - the device of hinged ventilated facades. The scheme of carrying out of a damage control, a substantiation of economic efficiency of the device of hinged ventilated facades and other technical advantages concerning other ways of warming of facades is presented.
Keywords: Technical inspection, thermographic quality monitoring, thermal characteristics of protecting designs, hinged ventilated facade
On the basis of experimental data on the resistance of reinforced concrete columns eccentric compression was obtained analytical dependence of the limiting compressibility of concrete from the varied factors: the relative eccentricity of the external force eo / h and the reinforcement ratio μ.
Keywords: reinforced concrete column, longitudinal reinforcement, a protective layer of concrete, finite element method, critical load
The existing methods of calculation of the annual change in soil temperature. Identified areas of their application and the possible deviations from reality. The requirements to the boundary conditions of the calculation. Defines the principles of the choice of initial conditions. The preconditions for the development of a universal method of calculation.
Keywords: heat pump, renewable energy, solar radiation, transient mode, soil
Is considered the main content of the possibilities for extending the services of the lifting cranes, on the basis of the definition of a residual resource of the machine. The algorithm is sampled( measurements) of the metal structures of cranes. A variant of transition from the hardness of steel to its strength.
Keywords: chapel strength, chapel, endurance, a residual resource, providing design, resource rationing, hardness