№ 132(8), October, 2017
Public date: 31.10.2017
Archive of journal: Articles count 111, 292 kb
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STUDY OF SEEDS SEPARATOR WORK BY SSM-2 WEIGHT
Description
The article describes the purpose, the device, the technological process of work, and also the justification of the parameters and operating modes of the sorting nozzles of the seed separator by weight, dividing individually the seeds of agricultural crops according to their individual weight, thus ensuring the selection of seeds with a large supply of nutrients, the energy of germination and the growth force contributing to the formation of the crop
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Description
The technique relates to the area of distribution of key information in cryptographic communication systems. The purpose of the work was to solve the problem of increasing the speed of distribution of key information for special bodies of federal bodies of critical facilities in the conditions of network-centric management and creating alternative options for the distribution of key information when key documents are compromised to special equipment. By applying the methodology, a solution to this problem is achieved by applying a key distribution method based on asymmetric cryptography using symmetric polynomials
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ANALYSIS OF TECHNICAL MEANS FOR GRINDING FEEDS AND THEIR CLASSIFICATION
Description
The authors have developed classification tools for grinding feeds and the most promising directions in the development of tools for the grinding of forages in reducing energy and metal consumption. We have described chopper stem of feed, which provides high performance and good quality of product. In the article, there is an analysis of existing methods of grinding coarse fodder and their classification. The work presents examples of application of stationary and mobile crushers for crushing of grain and roughage, the technical parameters of the equipment for preparation of feed for feeding
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Description
The tillage with moldboard plows is one of the energy-intensive operations in farming. In view of this, the search of the energy saving solutions and tillage aggregates receives priority. The use of rotary tillage tools based on the working body-mover with elliptic blades, which horizontal soil reaction parts are directed to favoring grade of the aggregate, and, therefore, apart from the performing engineering perform the body-mover functions, - is one of the effective ways of the energy cost reduction. The authors offer the development of the rotary cultivators based on the working body-mover with elliptic blades. The change of their design values allows the development of various profiles tools. The use of these working bodies based on rotary cultivators will allow the energy cost reduction by the tillage process, especially in the compartments of terrain, as the use of tractors with moldboard plows for the main tillage is problematic. In many cases, these lots must be labored manually. The article describes the construction, generalizes the mechanical specifications and working modes of the rotary cultivator at the main tillage
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FORECASTING THE PARAMETERS OF THE TECHNICAL CONDITION OF POWER PLANT ENGINES
Description
In this article, an algorithm and a forecasting model for a set of informative parameters are proposed. These parameters describe the technical condition of power plant engines with a possibility of estimating the forecast error
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SPECTRAL CHARACTERISTICS OF THE SINUSOIDAL MINIMUM (FREQUENCY) SHIFT-KEYING
Description
Signals with the sinusoidal minimum (frequency) shift-keying (SMSK) which impulse form depends on parameter µ are considered. Expression for power spectral density (PSD) of SMSK signals at various values of parameter µ is obtained. Results of PSD calculations and effective bandwidth of signals by various criteria are presented
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RISK MANAGEMENT IN WOODWORKING
Description
The article deals with urgent questions concerning activities of woodworking industries, which face tough economic situation. Nevertheless, these enterprises reveal a definite growth of output in some kinds of products, such as fuel pellets, window units, special timber assortments, etc. The problems about possible risks connected with equipment handling were identified, which has physical and intellectual wear, as most of it has been operating since 1980. On the basis of accomplished investigations of normative and technical sources the documents were specified, which establish safety regulations for operating equipment and requirements for risk assessment techniques. The necessity of their improvement is also determined. Taking into consideration peculiarities of management of woodworking production process, the analysis was carried out in order to estimate the factors, which influence the quality of mechanical treatment by the method of 5M. Following the observations and processing of statistical data it was established that equipment and personnel show the greatest impact on the quality of half-finished and final products. Risks evaluation method for woodworking industries is suggested with due account for equipment safety parameters, which includes determination of consequences, risk probability, risk level on scale factored “high”, “medium” and “low”. Much attention is paid to the items composed: rank matrix of two-factor model, with calculations of numerical values of risks, as product probability of occurrence and severity of consequences, and risk log. Three zones were appointed with the following risk levels: the first zone with weighting factor not less than 6, the second zone: 8-16, the third: 20-25. In course of investigation, it was detected that the highest risk factor, connected with equipment operation, is probability of mechanical injuries of hands and most possible – getting cuts. The flow chart of risks management during the woodworking production process is offered in accordance with all Union State Standard regulations R ISO 9001-2015 and GOST R ISO/MAC 31010-2011. The developed algorithm provides accomplishing performance of work on risks management in more available and short form with presentation of processing operations, actual doers, kinds of required normative documents and papers worked out within the enterprise
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COMBINED SYSTEMS OF ELECTRICITY SUPPLY BASED ON RENEWABLE ENERGY SOURCES
Description
Currently, there are widely used combined (hybrid) power systems in the world, made using renewable and conventional sources of energy. The article discusses a typical structural scheme of a combined system of electricity supply; it also shows the design and the characteristics of three types of structural circuit design of combined power systems and their main advantages and disadvantages. Peculiarities of the choice and calculation of parameters of the basic functional elements of the combined system have been presented. This study describes main characteristics of solar batteries and provides analytical expressions for the calculation of their main parameters. The main characteristics of batteries and the peculiarities of calculation of the capacity of storage batteries operating in autonomous systems have been listed. The features of selection of voltage inverters have shown that in addition to the nominal input and output voltage it is necessary to consider other characteristics that influence the work of autonomous power supply systems. It has been shown when it is desirable to use electromechanical generators to supply autonomous consumers. The types of structural solutions and the choice of the basic functional elements of combined power systems will increase the efficiency of their design
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THE TASK OF FORECASTING OF PUBLICATION ACTIVITY
Description
In the article questions of forecasting of publication activity and a problem of planning of actions on management of publicity activity of scientific collective are considered
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TO THE QUESTION OF MODELING OF OSCILLATORY PROCESS BY MEANS OF OBJECT-ORIENTED PROGRAMMING
Description
In this article, we have presented the study and implementation of the physical model of motion of two coupled pendulums with use of numerical methods. When building the model we were using the method of Euler solutions of differential equations, which displays pendulums visual motion, as well as building graphics of functions of speed, angle and acceleration depending on time with high reliability. We have generated equation of motion for generalized coordinates for the first and second mathematical pendulum. The generated application implements a physical model of a double mathematical pendulum, commit sustained oscillations with the ability to change the basic parameters: deflection angle, speed, mass and length of the rod in C++ language by programming environment “Embarcadero RAD Studio”. This application can be used as a model of a double mathematical pendulum in the study of oscillations, as a methodical manual and a virtual laboratory in physics, informatics and programming classes – for demonstration, study and create applications in the objectoriented C++ programming language
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