scholarly journals THE INFLUENCE OF THE STABILITY OF BAND SAWS ON THE QUALITY INDICATORS OF SAW PRODUCTS

2021 ◽  
Author(s):  
O. Bagno ◽  
Alexey Maksimenkov
Keyword(s):  
Initial Conditions ◽  
High Volume ◽  
High Quality ◽  
Small Width ◽  
High Feed ◽  
Increase Productivity ◽  
Circular Sawing ◽  
The Stability ◽  
Volume Output

The main drawback of circular sawing machines is the presence of broken teeth in the cut. In case of vibrations, violation of the saw plane, mismatch of the feed direction with the saw planes, and rebasing, these teeth spoil the processing surface. Belt sawing allows you to ensure high quality of lumber on the roughness of their surface at high feed rates; increase productivity by 1.5-2 times due to mechanization and automation of technological operations. One of the most important advantages of band saws is the small width of the cut, which is 1.5-2 times smaller than that of the sawmill; the small thickness of the saw ensures low consumption of wood in sawdust and high volume output of lumber. Sawing wood on band saws, in the vast majority of cases, is characterized by face cutting. Of the 3 forms of chip formation when cutting into the end, for band saws, the most characteristic is the formation of the chip element by chipping it with the stratification of wood along the bottom of the cut. The quality of the surface, in terms of its roughness, in addition to the formation of the chip element, is affected by its location in the interdental space, the presence and degree of compression and transportation of the chip element. The quality of the surface, in terms of its roughness, in addition to the formation of the chip element, is affected by its location in the interdental space, the presence and degree of compression and transportation of the chip element. As a result of studies of the initial conditions for the development of the teeth sharpening scheme, the orientation of the active elements of the blade relative to the middle plane of the saw can be identified as the main ones.

scholarly journals ON THE ISSUE OF PREPARATION OF CUTTING TOOLS FOR SAWING TIMBER ON BAND SAW EQUIPMENT

2020 ◽  
Vol 8 (1) ◽  
pp. 207-211
Author(s):  
Alexey Maksimenkov ◽  
O. Bagno
Keyword(s):  
Initial Conditions ◽  
Cutting Tools ◽  
High Volume ◽  
Small Width ◽  
High Feed ◽  
Increase Productivity ◽  
Circular Sawing ◽  
Band Saw ◽  
Volume Output

the main drawback of circular sawing machines is the presence of broken teeth in the cut. In case of vibrations, violation of the saw plane, mismatch of the feed direction with the saw planes, and rebasing, these teeth spoil the processing surface. Belt sawing allows you to ensure high quality of lumber on the roughness of their surface at high feed rates; increase productivity by 1.5-2 times due to mechanization and automation of technological operations. One of the most important advantages of band saws is the small width of the cut, which is 1.5-2 times smaller than that of the sawmill; the small thickness of the saw ensures low consumption of wood in sawdust and high volume output of lumber. Sawing wood on band saws, in the vast majority of cases, is characterized by face cutting. Of the 3 forms of chip formation when cutting into the end, for band saws, the most characteristic is the formation of the chip element by chipping it with the stratification of wood along the bottom of the cut. The quality of the surface, in terms of its roughness, in addition to the formation of the chip element, is affected by its location in the interdental space, the presence and degree of compression and transportation of the chip element. The quality of the surface, in terms of its roughness, in addition to the formation of the chip element, is affected by its location in the interdental space, the presence and degree of compression and transportation of the chip element. As a result of studies of the initial conditions for the development of the teeth sharpening scheme, the orientation of the active elements of the blade relative to the middle plane of the saw can be identified as the main ones.

An Improved Adaptive Algorithm for INS/GPS System

2013 ◽  
Vol 397-400 ◽  
pp. 1606-1610 ◽  
Author(s):  
Li Dong Wang ◽  
Ying Zhao ◽  
Ni Zhang
Keyword(s):  
Adaptive Filtering ◽  
Adaptive Filter ◽  
Adaptive Algorithm ◽  
Initial Conditions ◽  
Forgetting Factor ◽  
Kalman Filter Algorithm ◽  
Simulation Results ◽  
The Stability ◽  
Gps System

In INS/GPS system, the changing of initial conditions and the quality of the data can affect the convergence of the conventional Kalman filter algorithm. Sage-Husa adaptive filter algorithm is adopted in the INS/GPS system in this paper. The effecting of the forgetting factor to the improved Sage-Husa adaptive filter algorithm is studied and the simulation results show that when the forgetting factor taken near 0.97, the adaptive filtering result is best, the stability of the system is guaranteed and the convergent speed of error can be reduced.

Influence of Neighborhood Forms on the Quality of Pseudorandom Number Generators' Work Based on Cellular Automata

2020 ◽  
pp. 43-78
Author(s):  
Sergii Bilan
Keyword(s):  
Cellular Automata ◽  
Random Number ◽  
Initial Conditions ◽  
Experimental Studies ◽  
High Quality ◽  
Random Number Generators ◽  
Optimal Dimension ◽  
Pseudo Random Number ◽  
Nist Tests

The chapter analyzes modern methods for constructing pseudo-random number generators based on cellular automata. Also analyzes the influence of neighborhood forms on the evolution of the functioning of cellular automata, as well as on the quality of the formation of pseudo-random bit sequences. Based on the use of various forms of the neighborhood for the XOR function, the quality of generators was analyzed using graphical tests and NIST tests. As a result of experimental studies, the optimal dimension of cellular automata and the number of heterogeneous cells were determined, which make it possible to obtain a high-quality pseudo-random bit sequence. The obtained results allowed to formulate a method for constructing high-quality pseudo-random number generators based on cellular automata, as well as to determine the necessary initial conditions for generators. The proposed generators allow to increase the length of the repetition period of a pseudo-random bit sequence.

scholarly journals The Effect of Initial Purity on the Stability of Solutions in Storage

2013 ◽  
Vol 19 (2) ◽  
pp. 308-316 ◽  
Author(s):  
Ioana Popa-Burke ◽  
Steven Novick ◽  
Charles A. Lane ◽  
Robin Hogan ◽  
Pedro Torres-Saavedra ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Physicochemical Parameters ◽  
Storage Conditions ◽  
Stability Of Solutions ◽  
Initial Compound ◽  
High Quality ◽  
Freeze Thaw ◽  
Compound Screening ◽  
The Stability

Many modern compound-screening technologies are highly miniaturized, resulting in longer-lasting solution stocks in compound management laboratories. As the ages of some stocks stretch into years, it becomes increasingly important to ensure that the DMSO solutions remain of high quality. It can be a burden to check the quality of a large library of compound solutions continuously, and so a study was devised to link the effects of initial compound purity and physicochemical properties of the compounds with the current purity of DMSO solutions. Approximately 5000 compounds with initial purity of at least 80% were examined. Storage conditions were held or observed to be relatively constant and so were eliminated as potential predictors. This allowed the evaluation of the effects of other factors on the stability of solutions, such as initial purity, number of freeze-thaw cycles, age of the solution, and multiple calculated physicochemical parameters. Of all the factors investigated, initial purity was the only one that had a clear effect on stability. None of the other parameters investigated (physicochemical properties, number of freeze-thaw cycles, age of solutions) had a statistically significant effect on stability.

scholarly journals DRY MIXTURES AND MIXING EQUIPMENT FOR THEIR PRODUCTION

2021 ◽  
Vol 5 (12) ◽  
pp. 145-150
Author(s):  
Y. Fadin ◽  
O. Shemetova
Keyword(s):  
Building Materials ◽  
Raw Materials ◽  
Mixing Process ◽  
Chemical Additives ◽  
High Quality ◽  
Main Indicator ◽  
History Of ◽  
The Creation ◽  
The Stability

Today’s economic situation creates conditions for revising the existing base of materials and raw materials in construction, as well as for transforming and using it in the future. One of the ways to achieve this goal is the creation of new types of building materials, more effective and low in the price category compared to the classic ones. Dry building mixtures belongs to such materials. The high quality of dry building mixes is guaranteed by the stability of their composition and the properties of the ingredients used. Saving time when using high-quality dry building mixes will allow to get an irreproachable end result. A necessary component in the manufacture of dry building mixtures is the mixing process, which includes the preparation of raw materials, dosing and the distribution of chemical additives. The main indicator of the quality of the finished product in the production of dry mixes is its uniformity. Therefore, special attention is paid to the mixing section in the production line. The variety of bulk materials and their properties contributes to the creation of various types of mixers for high-quality mixing of components. The article discusses the history of the emergence of dry building mixes and mixing equipment for production.

scholarly journals Studi Pemanfaatan Limbah Beton Mutu Tinggi pada Campuran Asphalt Concrete Binder Course (AC-BC)

CANTILEVER ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 7-14
Author(s):  
Ika Sulianti
Keyword(s):  
Asphalt Concrete ◽  
Test Method ◽  
High Quality ◽  
Marshall Test ◽  
Standard Value ◽  
Standard Values ◽  
Asphalt Content ◽  
Value Flow ◽  
The Stability

The purpose of this research is to find out whether the modification of asphalt used with high quality of concrete waste as coarse substitute aggregate of Asphalt Concrete - Binder Course (AC – BC). In this study, the researcher used high quality of concrete waste fc’ 42, fc’ 47, fc’ 50, each waste concrete quality will be mixed with asphalt bitumen contents 5%, 5.5 %, 6 %, 6.5, and 7%. This research used the Marshall test method to determine stability value, flow value, Void In Mix (VIM), Void In Mineral Aggregate (VMA), Void Filled With Asphalt (VFA). AC - BC with high quality of concrete waste fc'42 obtained for the best bitumen content obtained is 7%, with a stability value of 1491.705 kg, flow 4.264 mm, MQ 343.465, VIM 9.190%, VFA 34.425%, VMA 15.067%. AC - BC with high quality of concrete waste fc'47 was obtained for the best asphalt content obtained was 7%, with stability values ​​1551.715 kg / mm, flow 4.587 mm, MQ 339.122, VIM 5.530%, VFA 63.308%, VMA 14.235%.The best results of the Marshall test were obtained at the high quality of concrete waste fc'50, asphalt content obtained is 7%, with the stability of 1616.145 kg, flow 4.859 mm, MQ 333.720, VIM 5.116%, VFA 55.597%, VMA 13.226%. Referring to the obtained research test, the values of stability match with Bina Marga standard value, namely 800 kg, but VFA value, VIM, and flow are not of Bina Marga standard values. In addition, VMA vales fulfilling Bina Marga standard values are concrete waste fc’42 and fc’47 with the scale 14%. The researcher hopes that this research will be the guideline in making a mixture of asphalt concrete binder courses with the replacement of coarse aggregate using concrete waste and to inspire people in utilizing concrete waste in technical aspects.

Improvement of Traction and Coupling Properties of the Small Class Tractor for Grain Crop Sowing by Means of the Hydropneumatic Damping Device

2020 ◽  
pp. 1-27 ◽  
Author(s):  
Sergey Evgenevich Senkevich ◽  
Pavel Vladimirovich Lavrukhin ◽  
Anna Aleksandrovna Senkevich ◽  
Pavel Aleksandrovich Ivanov ◽  
Nikolay Viktorovich Sergeev
Keyword(s):  
Negative Impact ◽  
High Quality ◽  
Grain Crop ◽  
Environmental Component ◽  
Cultivation Technology ◽  
Seed Distribution ◽  
The Stability ◽  
High Quality Seed ◽  
Cereal Cultivation

Sowing is one of the main operations in the technological complex of cultivation of cereals. Only with high quality seed distribution along the length and depth of the row can the maximum productivity and yield be achieved. A tractor with a seeding machine is subjected to continuously changing external influences that have a negative impact on the performance indicators of the technological operation. Based on the cereal cultivation technology, it is necessary to use tractors with transmissions that can absorb the oscillations and increase the stability of the coulter group of the seeding machine. Since this improves the quality of the operation, reduces the consumption of spent seed and fuel and increases environmental component of the process.

scholarly journals Influence of an Effective Motivation System on Increasing the Competitiveness of Enterprise

2021 ◽  
Vol 7 (522) ◽  
pp. 247-252
Author(s):  
O. A. Gavrysh ◽  
◽  
I. O. Gavrysh ◽  
Keyword(s):  
Specific Situation ◽  
Direct Relation ◽  
Wage Level ◽  
High Quality ◽  
Staff Motivation ◽  
Motivation System ◽  
Increase Productivity ◽  
Quality Of Products ◽  
Main Factor

The article examines the essence of staff motivation, analyzes the opinions of scholars on this issue. It is determined that among scholars there is no consensus on the interpretation of the term of «staff motivation». On the basis of extant researches the authors' own interpretation of motivation is proposed. The trends of wage development at Ukrainian enterprises are analyzed and conclusions are drawn based thereupon. One of the most important factors in the successful functioning of enterprise is the motivation of staff, which is the main factor of successful competitiveness. The process of motivation is largely determined by the needs that initiate it. If the needs of individuals coincide with the needs of the enterprise, employees will invest their efforts for their own satisfaction, which will increase productivity, reduce costs and ensure high quality of products, which altogether will increase profits and ensure the competitive position of the company in the market. It is emphasized that in the formation of motivation of staff it is necessary to fulfill the following conditions: study the dynamics of wage level; there should be a direct relation between the level of wages and the number and quality of labor results; the presence of a structure of personal income; material support of available money income, etc. Negative motivation is more effective if it is applied immediately after undesirable actions of the employee. The later the sanctions are applied, the less they affect the behavior of the employee. Due to the skillful use of negative motivation (its fair character and the dosage of the intensity of stimulus, a specific situation), it is possible to achieve a change in the behavior of employees for the better. Methods of improvement of the motivation system, which is aimed at increasing the competitiveness of the enterprise, have been developed. Staff motivation today is one of the most important factors in the successful functioning of enterprise, so management be very interested in the successful construction of a system that will meet the needs of employees.

scholarly journals Institutional Features of the Neo-Weberian state Civil service in the Mechanism of Management of Modern Military Organization

2020 ◽  
Vol 9 (6) ◽  
pp. 62-71
Author(s):  
P. A. Shashkin
Keyword(s):  
Human Capital ◽  
National Security ◽  
Civil Service ◽  
Military Policy ◽  
Service Model ◽  
High Quality ◽  
Military Organization ◽  
Institutional Features ◽  
The Stability

The author examines the institutional features of the civil service in the model of the “Neo-Weberian state” regarding improving the quality of management of a modern military system. The civil service is considered as an institution for the development of human capital, an element of civil-military synergy that guarantees the stability of management and the legitimacy of political power, including defining the goals of military policy. The study analyses the main features of representation and the realisation of the interests of actors within the framework of the civil service institute to ensure high quality of cognitive management and comprehensive national security. The author analysed the institutional features of the “Neo-Weberian state” civil service model — elitism and integrativeness, and the types of relations they form — autonomy and cognitiveness, on the example of the activities of the European Defense Agency. Analysis of the institutional features of the civil service in the “Neo-Weberian state” model in the mechanism of management of a modern military system serves to determine the motives and forms for the realisation of the interests of actors in military policy, including setting political goals of war, conducting intelligence activities and organising military-civilian cooperation.

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