№ 115(1), January, 2016
Public date: 27.01.2016
Archive of journal: Articles count 86, 182 kb
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NON-PARAMETRIC CYCLES ESTIMATORS
01.00.00 Physical-mathematical sciences
DescriptionIn many applications, we study the time series (or a random process), which is the sum of the periodic deterministic function of time and random errors that distort the periodic signal. It is required to estimate the length of the period and the periodic component. It does not assume that the periodic function is included in any parameter family of functions, such as finite sums of sines and cosines. It is obvious that the assumption of occurrence of a periodic function in parametric family does not meet the characteristics of the real world, ie, is conditional, internal mathematical (look for the keys under the lamp because there is a light, not in the bush, where lost, because there are dark). For similar reasons, it is impossible to assume that the distribution function of the random errors is included in any parameter family of distributions. In accordance with the new paradigm of mathematical statistics in this article we studied the problem of nonparametric estimation (minimum) length of the period and the periodic component of the signal. On the basis of natural variation and scope of indicators is suggested a new class of nonparametric estimators of the length of the period and the periodic component in the time series. Based on the general results of statistics of objects of non-numeric nature we proved the consistency of these estimates. From the practical point of view it is necessary to minimize the numerical (one parameter - ability length of period of time) one or more of the 66 functionals, described in the article
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ROTARY SCREW SYSTEMS IN CEMENT
DescriptionThe article presents results of research of rotary-screw systems in relation to the creation of rotary kilns for the annealing of-cuttings in the preparation of cement clinker. Using the proposed design, in comparison with known designs of similar purpose, it significantly improves performance, reduces size and power consumption through the use of rotary screw systems in the form of screw rotors and drums made hollow with sidewalls assembled from separate strips or plates of different geometrical shapes with form inside the screw breaks or smooth edges, screw surfaces and screw grooves. It is shown that the housing of the rotary kiln is expedient to produce helical surfaces whose centers of curvature are located within the housing. Using the proposed constructions rotary kiln during the firing when preparing cement wedge can increase the speed of rotation of the housing, furnaces 5-10 times due to changes in the rotary-screw systems increase efficiency and reduce the size of furnaces
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USING MECHANISMS OF FORMALIZATION OF DIDACTIC CONTENT FOR SKILLS DEVELOPMENT MONITORING
DescriptionThe relevance of an effective system of professional development for science-intensive and high-tech industries demonstrates not only the need to promptly respond to the global challenges of the modern economy, but also the presence of professionals able to reform the Russian economy in conditions of adverse effects of the sanctions. The leading role in these processes is assigned to highly qualified staff, which is formed in the process of training specialists within the system of continuous professional education and training (CPEandT). Expansion of the use of the system of CPEandT in modern educational technology (MET) opens new possibilities for advanced training and monitoring of this process by formalizing mechanisms of didactic content. We have developed specific mechanisms of formalization of the bestknown relationship between the information flow of didactic content and scope of knowledge of professional disciplines plan of professional development, as well as the possibility of their use for the monitoring of the process. The article discloses mechanisms of formalization of the process of professional development for science-intensive and high-tech industries, which will actively contribute to their successful implementation and monitoring
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MATHEMATICAL MODEL OF A DRYING PROCESS OF CORRUGATED CARDBOARD
DescriptionThe feature of the process of drying of corrugated cardboard is different drying processes on three sections of the drying table. The article solves the problem of obtaining a mathematical model of drying process of corrugated cardboard. This structural identification process, defined the input and output parameters, denoted the transmission coefficients for the control channels and indignation
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THEORY OF ELECTROMAGNETIC DRIVE WITH ELEMENTARY PARTICLES CURRENT AND VACUUM POLARIZATION
01.00.00 Physical-mathematical sciences
DescriptionThe article discusses a model of rocket motor of electromagnetic type, consisting of a source of electromagnetic radio frequency oscillations and the conical cavity, in which electromagnetic waves are excited. We have created a multi-dimensional transient numerical model describing the process of establishing electromagnetic oscillations in the resonator, taking into account the finite conductivity of the walls. Separately, the standing waves in the cavity with conducting walls have been simulated. It is shown that the oscillations mode in the conducting resonator different from that in an ideal resonator, both in a case of steady and unsteady waves. We have built a dynamic model taking into account the thermal conductivity and electrical conductivity of the walls, waves and particles emission and vacuum polarization. We have also developed a dynamic model enables to optimize a thrust force on a considerable number of parameters without the involvement of the hypotheses about the physics of the phenomenon. We run the optimization of the operating parameters of the device, namely by the excitation frequency, the frequency of the modulating signal, the magnitude of heat losses of electromagnetic energy by thermal radiation in the IR spectrum, the parameters of forced heat transfer and the temperature dependence of the resistance of the material of the cavity walls. It is found that the pulse modulation greatly improves the efficiency of conversion of electromagnetic energy into thrust. The mechanism of formation of traction, adjusting the metrics of space-time, the current contribution of elementary particles, the Yang-Mills and electromagnetic fields is proposed. It is shown that the contribution of the elementary particles in the thrust force is proportional to the electrical conductivity of the system multiplied by Abraham force
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FORMATION AND USE OF ILLUSTRATIVE IMAGES IN THE “BIOETHICS AND QUESTIONS OF BIO SAFETY” COURSE
DescriptionIn this article, we describe the experience of formation and creating illustrative images for the course called «Bioethics and questions of bio safety». The peculiarity of this course is to review bioethical problems in the context of concrete scientific activities of the biologist – research, experimental work. The part of the course issues related to Bio safety, is revealed as an interdisciplinary area of knowledge focusing on the identification, study and understanding of biological practice and biological research associated with broad philosophical and moral component. The main blocks have been identified, which form visual resources: animals in the experiment, the questions of bioethics in the media; the metamorphosis of the human body; chimeras in works of art. In the selection of illustrative images we have taken into account several aspects: illustration, as an information resource for the analysis of the studied phenomenon; illustration, as a form of motivation to seek information, the answer to the question; illustration, as an element of ethical education of the student to different issues of bioethics. For each semantic unit collected 20-30 illustrative images within two years. They are used both when reading a lecture course and as material for independent work of students. It is shown that the presented visual resources for the course reflect the basic components of visual thinking: linear; structural; combinatorial and functional
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STATE AND PROSPECTS OF APPLIED AND THEORETICAL STATISTICS
01.00.00 Physical-mathematical sciences
DescriptionThe general scheme of modern statistical science is just like this. Mathematical Statistics is a part of mathematics that studies the statistical structure (it itself does not give recipes analysis of statistical data, however, it is developing methods that are useful for use in theoretical statistics). Theoretical Statistics - the science dedicated to the models and methods of analysis of concrete statistical data. Applied Statistics (in the narrow sense) is devoted to the statistical techniques of data collection and processing (it includes the methodology of statistical methods, the organization of sample surveys, the development of statistical techniques, the creation and use of statistical software). Applications of statistical methods in concrete fields (in economics and management - Econometrics, in biology - Biometrics, in chemistry - Chemometrics, in technical research - Technometric, in geology, demography, sociology, medicine, history, etc.). Often positions 2 and 3 together are called Applied Statistics. Sometimes position 1 is called Theoretical Statistics. These terminological differences are related to the fact that the above-described development of the considered scientific and applied field not once, not completely and not always adequately reflected in the minds of experts. Meanwhile, there are still textbooks of appropriate level of representation of the mid-twentieth century. The article analyzes the post-war development of the national statistics. We have identified five "growth points": nonparametrics, robustness, bootstrap, statistics of interval data, and statistics of non-numeric data. We have discussed content, development and the basic ideas of statistics of nonnumeric data. We have given a number of unresolved problems of theoretical and applied statistics
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NEW DESIGNS OF COLUMNS, INHABITED, INDUSTRIAL AND ADMINISTRATIVE BUILDINGS
DescriptionOriginal screw designs of buildings and columns are offered. Frameworks of these buildings and columns are the bearing elements and means of external and internal decoration of buildings and constructions. Originality of such buildings and columns frameworks is ensured by the fact that their design is decorated on the outer surface with broken or smooth screw edges and screw surfaces. Versatility of the offered screw columns trunks designs, as well as the possibility of performance of their left or right screwing allows reaching certain symmetry or their repeatability in the form of harmonious alternation of the bearing trunks of screw columns and spaces between them. Giving to numerous sides of trunks of screw columns of a certain invoice, or their coloring in different colors, will contribute even more to their expressiveness and beauty. Durability and vibration resistance (including seismic) of such trunks of screw columns at the same volumes of construction materials, in comparison with round and rectangular trunks is higher
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EXPECTED PROFIT OPTIMIZATION OF CONSULTING COMPANY USING THE METHODS OF DYNAMIC PROGRAMMING
DescriptionThe article presents the methods of specialists’ distribution for a consulting company between its projects in accordance with the methodology of dynamic programming for expected profit maximization. For its implementation, a mathematical model is being formed with nonlinear objective function and linear restrictions. The non-linearity of the objective function is due to the specifics of consulting companies and their size. The model includes probability parameters determined by expert evaluations method based on previous experience of the company in the analogical works and describing successful implementation of each project in its portfolio. Then the parameter and function of the state, satisfying recurrence are considered and linear replacement is performed to reserve a minimum number of experts on each job. The article gives a hypothetical example of a consulting company, including in its portfolio five projects with the mentioned profits in case of their success. On its basis, the developed method is implemented as a 5-step procedure of modeling of unknown parameters. Economic impact of the methods’ application is estimated . The developed model and method can be used by specialists in consulting companies, as well as in service industries
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THEORETICAL ASPECTS OF THE FORMATION OF A LAND MARKET
DescriptionThe article substantiates theoretical aspects of the formation of a land market. It is shown that there is a problem of insufficient knowledge of its formation. The article lists the features of land as part of the natural environment, a factor of production, part of the capital, a real estate object, defining features of the land market. It is shown that supply in the land market in the short term is elastically, despite the fixed supply at any given moment, and inelastically in the long term. We substantiated expediency evaluation of public and private land market in terms of turnover, which expresses the ratio of the total land area of transactions in the segmental markets to the total amount of land in some form of ownership. We proposed to evaluate the development potential of the turnover of the analyzed segment of public sector land market with the help of the methodology of growth curves. This work presents internal and external macroeconomic factors and institutions that form the infrastructure of the land market. It concludes about the need to improve the institutions of valuation of land, land banks, information base, land management and real estate cadastre. We proposed to study the land market from the standpoint of neoinstitutionalism. In accordance with the theory of Ronald Coase, this work shows the significance of transaction costs for the development of the land market. We clarified the classification of the transaction costs arising before and after the transaction O. Williamson, in relation to the land market and concluded on the need to reduce them. We substantiated the necessity of state regulation of the land market, improvement of economic land management practices