05.00.00 Technical science
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NOISE-IMMUNITY OF PSEUDO-NOISE SEQUENCE ACQUISITION ALGORITHM FOR MC-CDMA COMMUNICATION SYSTEMS
DescriptionThe goal of the study is to research a noise-immunity of pseudo-noise sequence acquisition method for multicarrier communication systems MC-CDMA, using a segment of the pseudo-noise sequence. The goal was achieved by running a simulation developed in MATLAB. By analyzing the results, we can show that the developed mathematical model produces the lower bound for pseudo-noise sequence acquisition probability. The resulting analytical estimations might be used during the design phrase for pseudo-noise sequence acquisition systems for MC-CDMA based military communication networks
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THE RESEARCH OF SERVICE DATA TRANSFER USING PATTERNS
DescriptionThe article presents the results of stress testing of the service data transfer using templates
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DESIGN FEATURES OF THE NEW CHISEL COMBINED AND CALCULATION NEEDS OF THE ENGINE POWER AT HIS WORK
DescriptionThe article presents technologies and design features of the proposed chisel combined unit, combining in a single pass over the field 3 operations: deep loosening, crumbling additional topsoil and alignment, fertilizing. Design features of such a subsoiller as the basis of the unit include a chisel on each rack, fixed at an angle of 15-25 degrees to the horizontal and lessons along the center line of the rack feet, and flat cutting fun-leveling, consisting of two coaxially bred drums equipped with ripper teeth securely fastened according to our patents and placed in 5-9 rows on the surface of the drums on the helix, with rows of teeth on both drums have the opposite direction. The teeth of the first drum are long by 5-9 cm than the second, the clearance between the teeth of the first and second drum does not exceed 1.5 cm, and the ends of the teeth between the first reel and the cylindrical surface of the second - 1 cm. Front legs each provided with a divider soil laid down by its center and related to the lower of its parts - the bit. The first reel is mounted to 5 cm clearance between it and the cylindrical surface of the soil, which improves process reliability. We have got analytical dependences of the required power for the engine of the tractor unit with the proposed change of the working speed and width at the optimum utilization traction tractor plowing 0.9. We have justified a preferred brand of domestic and foreign tractors for this purpose
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CALCULATIONS FOR BAND SAWS FOR STRENGTH AND TENSILE FORCE TO ENSURE SUSTAINABLE CUTTING
DescriptionThe article presents a method of engineering calculation of the strength of band saws and belt force to stabilize the cut
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OPTIMIZATION OF LOAD BALANCING ACROSS SERVER PLATFORMS OF WEB APPLICATIONS
DescriptionThis article describes the developed algorithm for optimal load distribution between heterogeneous systems in terms of performance when working with a distributed web application
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THE DEVICE FOR PROTECTION OF ASYNCHRONOUS ELECTRIC MOTOR
DescriptionThe new device of protection, which works depending on the factor of asymmetry of pressure and loading of asynchronous electric motor, is offered. The principle of its action is described in details
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THE INFLUENCE OF LOW TEMPERATURES ON THE QUALITY OF PECTINACEOUS SUBSTANCES FRUITS AND BERRIES
DescriptionIn the article we present the results of the researches of influence of low temperatures on the qualitative characteristics of pectin substances of cherry fruit and berries currant. Comparing the information before and after freezing shows that qualitative indicators are decreasing, but only slightly
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Description
The article presents a study of dynamic factors of vibration process of undercutting roots for optimization of process parameters of undercutting of roots
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Description
The article describes the method of calculating the estimation trajectory of a nonlinear moving object using bearings-only information. The method has the properties of continuity, robustness, and improves the accuracy detection of the parameters motion in comparison with existing methods
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SIMULATED MACHINES FOR SOIL TREATMENT FOR FELLING AND SLASH AREAS
DescriptionThe article presents the results of a simulation of functioning machines for tillage in AutoCAD Mechanical environment, the algorithm of machine work and the results of numerical experiments on the developed model