05.00.00 Technical science
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Description
The article deals with the study of vehicles impact on the environment, since one of the main causes of air pollution are cars with internal combustion engines. One of the most important measures in the fight for clean air is the creation of an environmentally friendly transport. From this point of view, the most promising is the electric car, as the only solution to the problem of atmospheric pollution. In this article, the history of the development of modern electric vehicles, the advantages and disadvantages of their design, as well as the possibility of introducing electric vehicles into everyday life are considered. After the analysis, it was concluded that, in spite of the obvious advantages and the huge path that electro mobiles went through in their development, humanity is still not ready to refuse from cars with internal combustion engines, opting for electric vehicles
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ELECTRO SOLAR WATER HEATING FOR AGRICULTURAL CONSUMERS
DescriptionIn the article, we have described an electro solar water heating system for agricultural consumers. The results of computer modeling in the “Modeling in technical devices” software package have been given
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AN ELECTRIC MODEL OF A CITY TRANSPORT NETWORK
DescriptionThe main characteristics of a transport network are the intensity of the traffic flow, speed and density of its traffic. Comfortable driver's traffic density is determined by the rule of the traffic police, which is "clearance between cars on the road should be a tenth of the speed of movement." We have built a reference curve of the density function of the flow of vehicles on its speed, which is basic when simulating a traffic flow. The article describes a model of electrical city transport networks, allowing calculating traffic flows, their speed, the density and the number of traffic lanes by means of laws of electrical engineering. We have also compared electrical concepts (current, resistance, electro-motive force, etc.) and transportation (of intensity-flow lane road, transport driving force, etc.). For the transport network there are methods of calculation of electrical circuits - a method of Kirchhoff's laws, loop currents, etc. We have confirmed the correctness of electric models and the possibility of its use for the calculation of transport networks; as well as we have presented an example of the calculation
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Description
The article presents two express-methods of multidetails women’s dresses design, which allow to determine the optimal size and form of the cut out details depending on the way of clothes form shaping. Methods are developed based on the Paco Rabanne’s fashions analysis
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EXPRESS METHOD OF EVALUATING OF OLEIN ACID MASS PART IN SUNFLOWER-SEED OIL
DescriptionThe article gives the results of elaboration of the express method to define olein acid mass part in high olein sunflower-seed oil
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EXPLOITATION OF LIFE SUPPORT SYSTEMS IN POPULATED PLACES
DescriptionThis article describes aspects of control, regulation, functioning and degree of influence on the condition of life-support systems, on the safety of life support, on the safety vital functions of society. The impact of life-support systems on the ecological status of builtup areas. The article refers to an increase in emissions and the dangers of СО2 и SО2, about methods to reduce them. It presents the dangers of hydrogen compounds, nitrogen, chlorine, freon. We have also presented measures to protect the environment in urban areas
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EXPERIMENTAL RESEARCHES OF NOISE AND VIBRATION IN BAND-SAW MACHINE TOOLS
DescriptionIn the article, the process of noise formation in a band-saw machine tool is described and the way of clearing of noise and vibration which productivity is confirmed with the experiments is offered
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EXPERIMENTAL STUDY OF NOISE AND VIBRATION OF THE BAND SAW FRAME SAWS AND WOODWORKING MACHINES
DescriptionThe article presents the results of experimental studies of band noise generation and multirip woodworking machines. The studies have shown that saw woodworking group, as well as metal, are general patterns in the formation of the spectral composition that allows to approach the development of practical recommendations to reduce sound pressure levels in the work area to the operators of sanitary norms. Of particular note is the fact that elevated levels of noise generated by the cutting tool. The effect of changes in process parameters, in particular, the depth of cut and feed to levels of noise generated by the tool. For example, increasing the depth of cut in half leads to an increase of sound pressure levels at 5.8 dB (theoretically obtained value is 6 dB), and supplying a halving of the sound pressure levels reduces by 5 dB. High enough for engineering purposes convergence of theoretical and experimental sound pressure levels and the fact that the calculated values above experimental, allows the calculation and design of the system to reduce the noise under consideration in the machine is, only in service but also in their design
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EXPERIMENTAL RESEARCH EFFORTS TO UPROOTING TREES AND BUSHES PLANTED
DescriptionThe article presents the methodology and the results of experimental studies to determine actual values of effort arising from uprooting trees and shrubs plan-tations in the Republic of Mari El. On the basis of experiments and regression analysis we have established the coefficients of the approximation-defining relation between the force and the diameter of the stem of tearing depending on the type of crops
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Description
Getting the maximum number of day-old chicks largely depends on the disinfection of hatching eggs. Disinfection of eggs is important in the complex of veterinary-sanitation activities carried out in poultry farms for the prevention and elimination of infectious disease in birds. The perspective of using ozone in the poultry industry is possible due to its advantages characterized in comparison with other chemicals. It was found that ozone has the special ability to retard the growth of fungi in the biological substrates, also slows the appearance of mold on the surface of the eggshell even at 90 % relative humidity. When making parameters and modes of electro-ozonation process of egg store poultry farms there were carried out experimental studies. After ozone disinfection of hatching eggs, total bacterial contamination of shell eggs decreased by 99.89 %. The relative error of the experimental values of the theoretical amount was 7 %. As a result of production tests we set quality parameters developed by the process of electroozonation egg store poultry farms: regulation time is 8 minutes, dynamic error is 0.9, overshoot rate is 4.5%, generalized integral RMS figure is 10.6 % . The findings suggest that there is a qualitative regulation of the distribution of ozone in the egg store