№ 108(4), April, 2015
Public date: 30.04.2015
Archive of journal: Articles count 91, 194 kb
-
SYNTHESIS OF MODULAR UNINTERRUPTED POWER SUPPLY SYSTEMS WITH INCREASED RELIABILITY
Description
The level of technical development today requires the creation of highly effective, including reliable, uninter-rupted power supply systems. We have shown modern requirements and design features of modern systems of uninterruptible power supply, which should be built on a modular principle. It is shown that the problem of synthesis of systems in a modular approach is addressing three issues: development of the structure of the system subject to the requirements of consumers to quality of power and the allowable time of power outage; determining the required level redundancy of major functional units (blocks, elements) to ensure the required reliability of the system; - ensuring the most effective interconnection of modules, including electromagnetic compatibility, and the rational use during normal and emergency operation of the system. We have proposed new structural solution of the main functional units and uninterrupted power supply systems in modular design. To reduce EMI and improve efficiency uninterruptible power supply systems in the design of static converters we need to use a transformer with a rotating magnetic field. In addition, the prospective current is to be used as a source of renewable energy. Another promising approach is the use of direct frequency converters as voltage stabilizers and frequency of the current
-
CHOOSING SOLAR PHOTOVOLTAIC PLANT
Description
Promising is the direction and, above all, in matters of energy saving and energy efficiency of Autonomous systems of power supply, the use of renewable sources-newable energy as a major source of energy for consumers in remote areas. Here priority is given to solar energy. Since solar radiation can be change place not only in heat and electrical. The article contains three main structural schematics of electricity supply with solar power plants. The features of their work are disclosed, as well as an algorithm for calculating solar energy systems, the sequence of which is to define the required parameters, the daily energy consumption by consumers of electric power, the calculation capacity of the battery, the choice of the inverter and determining the area of solar batteries. The article reveals the conditions that affect the calculation of the PV system. It is shown that the greatest efficiency, including economic and reliability we have at combined (hybrid) Autonomous system, which was carried out with both solar power and wind power and gas stations. The important matters of improving the reliability of solar systems are the introduction to the design of a new element of the base, and first and foremost, Autonomous inventors performed on a single-phase transformer with a rotating magnetic field
-
CHARACTERISTICS OF THE DYURSO RIVER ICHTHYOCENOSIS
Description
In the article we have described the history of the studies and the modern features of fish community of the Black sea's river Durso (the length 14 km). It was established, that in present time the river includes only seven species of fishes from three ecological groups: freshwater (five species), saltwater (one specie) and marine (one specie). A bleack (Alburnus alburnus) and Colchis minnows (Phoxinus phoxinus colchicus) dominate by quantity in the structure of Durso river fish community, bleack and Prussian carp (Carassius auratus gibelio) dominate by biomass. The negative changes of Durso river conditions were found in compare with the last years. First of all, it appears in biological pollution of fish species allochthonous for this river. In the period of the Durso river monitoring (1935–2014) it was established the distinct raise of allochthonous components with parallel reduce of variety of autochthonous fresh waters rheophilic species. The main reason is the building of reservoir in upper flow of the Durso river in 1976. The additional negative factor influence on of the Durso river fish community is the falling down of the water level during the important period of fish lifecycle. The best condition of fish community is in the middle part of the river were reaches combine with the cold springs and powerful flow
-
ANALYSIS OF SPATIAL STRUCTURE AND CONDITION OF STANDS IN “YAMKA” PARK OF PETROZVODSK
06.00.00 Agricultural sciences
Description
The article presents the results of the evaluation of the spatial structure and condition of trees and shrubs in different types of park stands located in the park called “Yamka” in Petrozavodsk. Features of planning and spatial distribution of trees and shrubs have been identified. The species and number of plants in good, satisfactory and unsatisfactory states were determined. The conducted analysis of species distribution and the number of trees and shrubs in each category of state allows suggesting the activities for reconstruction of park stands
-
OUTSOURCING AS AN EFFICIENT TECHNOLOGY FOR CONSOLIDATION OF CAPITAL PARTNERS OF THE CORPORATION
Description
The article examines the traditional concept of outsourcing from the perspective of the characteristics of a public Corporation of the knowledge economy and building competitiveness. The author notes essential narrow interpretation of traditional outsourcing and examines a new, broader understanding of how the mobilization of intellectual and human capital, third party outsourcers for the benefit of the Corporation. Formation of the sector of the knowledge economy in Russia actualizes the importance of joint and coordinated problem solving connections intellectual, human and other intangible capital partners, who are provided with a number of activities as part of the mega business process associated with the production of intellectual goods and services. According to the authors, the development of outsourcing leads to a network form of business organization and mega business process is transformed into a network conglomerate, the capital of which is "adapting" to each other with the formation of a harmonious configuration of material and immaterial capital. Such configuration of capital we call capitulorum, as a new instrument for the realization of development strategy
-
01.00.00 Physical-mathematical sciences
Description
Metric describing the accelerated and rotating reference system in general relativity in the case of an arbitrary dependence of acceleration and angular velocity on time has been proposed. It is established that the curvature tensor in such metrics is zero, which corresponds to movement in the flat spaces. It is shown that the motion of test bodies in the metric accelerated and rotating reference system in general relativity is similarly to the classical motion in non-inertial reference frame. Maxwell's equations and Yang-Mills theory are converted to the moving axes in metric describes the acceleration and rotating reference frame in the general relativity in the case of an arbitrary dependence of acceleration and angular velocity of the system from time. The article discusses the known effects associated with acceleration and (or) the rotation of the reference frame - the Sagnac effect, the effect of the Stewart-Tolman and other similar effects. The numerical model of wave propagation in non-inertial reference frames in the case when potential depending of one, two and three spatial dimensions has been developed. It has been shown in numerical experiment that the acceleration of the reference system leads to retardation effects, as well as to a violation of the symmetry of the wave front, indicating that there is local change of wave speed
-
01.00.00 Physical-mathematical sciences
Description
In the article we consider integrative codes of the elements of discrete systems for the first time. It is shown that these codes in the general case divided into group and system parts. The group part of the code characterizes a set of elements with identical value of the sign as a whole. System part of the code appears when different sets are combined into the system. We have established that in using the weighted average of these parts of integrative code we can express information measures of combinatorial, probabilistic and synergistic approaches to determine the quantity of information. It is concluded that there is an integrative coding relationship between these approaches, and the existing types of information have genetic relationship. It is shown that the information considered in the synergetic approach is genetically of primary in relation to the information, which operates on the combinatorial and probabilistic approaches. Also, we have answered the question why the different conceptions of information lead to identical formulas to measure it
-
COMPUTERIZATION OF INVESTIGATION TARGETING AND PLANNING
Description
The article deals with the problems of the automation of an investigation targeting and planning. The authors consider the possibility of the development of the automatic logic system for designing and using investigation methods of different types of crime. The authors propose the following solution of the problem: handling of the data of criminal cases of the certain type of crime to analyze and highlight the initial information; developing of the typical investigation situations and hypothesis with logic chain; developing a set of measures (investigative activities, search operations, organizational preparations and other actions), which can help achieve the objectives; list of tools necessary to carry them out
-
DEVELOPMENT OF INTELLECTUAL SYSTEM PREVENTING LEAKAGE OF PROTECTED INFORMATION USING KNOWLEDGE BASES
Description
The article deals with the problem of increasing the efficiency of the control and prevention of leakage of confidential information circulating within the organization, and in cooperation with the information networks of general use through the development of intelligent system of pragmatic identification of confidential information. The main purpose of this system is to develop early detection, prevention and localization (minimization) of the risks associated with violation of the order of processing, storage and transmission of confidential information. The article presents an approach to the organization of the knowledge base of intelligent system of pragmatic identification of information of a confidential nature, using two models of knowledge representation. We have defined a subject field to meet the challenges of which the intelligent system was meant for. The article describes the ontological model of knowledge representation used for formal representation of domain concepts in the knowledge base. It presents an indicator of exactness of meaning reference to a concept of domain meaning. The article describes a confidence index for each rule from the rule base that characterizes the measure of the likelihood of a conclusion when a rule implemented. It presents a general structure of the rules base, conditions of execution of each rule of conclusion. To accelerate the work of intelligent system a parallel search for the rules in the knowledge base is to be applied. In conclusion, the algorithm of parallel search is described
-
Description
For explaining the regulatory mechanisms of biological the methods of classical biology, chemistry and physics are clearly inadequate, since the structure and function of these mechanisms are determined by the motion of the electron clouds in conjugated molecules. This "movement" can lead eventually to a complex organization called life only if they are subject to certain static laws and, therefore, may eventually be known in all the complexity of their relationships. Biological objects, resulting in the evolution of the environment, are like a part of that environment. Information stored in the seed, based in its deployment on energy and material resources of the environment. Moreover, in the process of development body derives more information from the environment. Nature has the extreme complexity and diversity. Examples include a huge variety of organisms, the complexity of atomic processes, the structure of the solar system and the stellar galaxies. There are four types of different interactions with the help of which we describe all physical phenomena. Today, it seems to us that all the various manifestations of the nature of elementary particles are reduced to the action between them of these four kinds of forces. The most famous of these are the gravitational Zion and electromagnetic forces, which are directly manifested in the world around us. Gravity allows us to stay on the Earth and allows planets to stay in their orbits. Electromagnetic interactions of electrons inside atoms and molecules cause all known chemical and physical properties of ordinary solids, liquids and gases and, in addition, are the basis of all of the processes occurring in living organisms. Research in the field of magneto proved that the biological systems are selectively susceptible to the action of electromagnetic fields as a function of their intensity, exposure time and frequency
pdf 0kb
doc 0kb