Rational Values Research Articles

Towards trust-based governance of health data research

Developments in medical big data analytics may bring societal benefits but are also challenging privacy and other ethical values. At the same time, an overly restrictive data protection regime can form a serious threat to valuable observational studies. Discussions about whether data privacy or data solidarity should be the foundational value of research policies, have remained unresolved. We add to this debate with an empirically informed ethical analysis. First, experiences with the implementation of the General Data Protection Regulation (GDPR) within a European research consortium demonstrate a gap between the aims of the regulation and its effects in practice. Namely, strictly formalised data protection requirements may cause routinisation among researchers instead of substantive ethical reflection, and may crowd out trust between actors in the health data research ecosystem; while harmonisation across Europe and data sharing between countries is hampered by different interpretations of the law, which partly stem from different views about ethical values. Then, building on these observations, we use theory to argue that the concept of trust provides an escape from the privacy-solidarity debate. Lastly, the paper details three aspects of trust that can help to create a responsible research environment and to mitigate the encountered challenges: trust as multi-agent concept; trust as a rational and democratic value; and trust as method for priority setting. Mutual cooperation in research—among researchers and with data subjects—is grounded in trust, which should be more explicitly recognised in the governance of health data research.

CPM-GFDM: A Novel Combination of Continuous Phase Modulation and Generalized Frequency Division Multiplexing for Wireless Communication

In this paper, continuous phase modulation-generalized frequency division multiplexing (CPM-GFDM) is proposed. The performance of CPM-GFDM is evaluated over Gaussian and frequency selective fading channels. In the proposed technique, the mapper in the transmitter and the de-mapper in the receiver of traditional GFDM are replaced by a CPM mapper and de-mapper, respectively. Using Monte-Carlo simulations, the bit error rate performance is evaluated for several rational values of the modulation index. We establish the superiority of CPM-GFDM over traditional GFDM using error performance plots through extensive simulations. We demonstrate that there are several values of the modulation index that give a performance superior to the conventional GFDM, with h=12,310,516,716 giving the best performance for additive white Gaussian noise (AWGN) channels, while for the frequency-selective channels the best performance is observed when h=310,516,716.

THE RESULTS OF A CONTINUOUS FEED TRAY VIBRATING MIXER’S EXPERIMENTAL STUDIES

The feed components’ uniform mixing is an urgent problem. To solve this problem, it is proposed vibrating mixers using. The tray vibrating mixer’s operation process hasn’t been investigated sufficiently, that makes it difficult the rational parameters for its operation to select. This research purpose is the tray vibration mixer operation’s rational parameters ensuring feed components uniform mixing to determine. A three level secondorder Boxing plan’s mathematical model as the experiment compiling was used. The raw materials’ two types of mixing uniformity dependence on the components feed rate, vibrating mixer’s amplitude and tray vibrations’ frequency was investigated. A regression equation describing this process of vibration’s mixing with varying factors adequately was derived. Data of variable factors’ influencing were obtained, a mathematical model of two components mixing’s process was created, that allows the variation’s coefficients within the accepted ranges variation’s input factors to calculate. It was found that at the tray oscillation frequency increasing, the mixing’s uniformity was increased, however, after reaching the oscillation’s frequency of 22,4 Hz, the material particles’ movement in the opposite direction had been beginning, that this mixer producing had reduced. The vibration tray mixer’s rational operation parameters values are: the components’ feed rate is 92-93 kg/h, the tray’s oscillation frequency - 20,2-20,8 Hz and the oscillation’s amplitude - 0,0022-0,0024 m. At these mixer parameters’ values, components mixing uniformity - is 93,2%. As a result, vibration tray mixer’s operation process rational parameters values were determined, as corresponding to the feed mixing quality’s zootechnical requirements.

Пошук оптимальних параметрів фінішної антифрикційної безабразивної обробки гільз циліндрів автотракторних двигунів

This paper presents the results of research aimed at improving the quality of antifriction coatings obtained by finishing antifriction non-abrasive treatment (FANT). It has been previously established that the formation of an antifriction coating during FANT largely depends on the technological parameters that determine the conditions of contact between the tool and the surface being treated. The study of the peculiarities of surface contact, their regularities, as well as the main parameters of the FANT process, makes it possible to improve the quality of the antifriction coating, and therefore the operational properties of the part. The aim of the presented research is to evaluate the influence of technological factors of the FANT process on the quality of antifriction coatings and to obtain their rational values. The indicators of the quality of the antifriction coating are its continuity, surface roughness and mass transfer of the antifriction material. The optimisation parameters are the main modes of FANT and the geometrical characteristics of the initial surface to be treated. To determine the influence of the selected factors on the indicators characterising the quality of the antifriction coating, a central composite plan matrix was implemented, which allowed us to obtain mathematical models of the influence of factors on the adopted response functions. The processing of the experimental data was carried out using the STATISTICA 12.0 software package. As a result of the multifactorial experiment, statistical models were obtained that allow assessing the impact of the studied factors on the optimisation criteria. The significance of the obtained coefficients was checked using the Student's criterion, and the adequacy of the obtained equations was checked using the Fisher's criterion. A detailed analysis of the Pareto map and tabular results of the experiment allowed to establish the influence of the research factors on the optimisation criteria. The obtained mathematical models made it possible to determine the optimal combination of technological factors that ensure the quality of the coating, as well as to establish the rational values of FANT modes and geometric characteristics of the output surface.

Investigación sobre el estilo y las características de los libros de texto de la teoría musical básica en china en los últimos cien años

Abstract: Due to various historical and realistic reasons, the development of basic music theory in China lags behind in the teaching system, teaching content and other aspects. It is an important task for Chinese music workers to revise or supplement the current basic music theory and related textbooks and then build a discipline system of basic music theory in China. This paper synthesizes the theories of music education and music history, music culture, music morphology and other related disciplines. It uses scientific, objective and rational values and holistic and comprehensive concepts. It takes the development of the basic music theory education of China as the research object and takes history as a mirror to further consider and prospect the construction of the basic music theory discipline system of China. The basic theory of Chinese Music can be roughly divided into three stages: (1) The basic music theory from the early 20th century to the founding of the People’s Republic of China; (2) From the founding of the People’s Republic of China to the period of reform and opening up; (3) Basic music theory compiled and published since the reform and opening up. It can be seen, from the development of the basic theory education of Chinese Music and its teaching materials, that the development of western music theory in China, before the founding of the People’s Republic of China, was a process from passive acceptance to active absorption. The scope of spreading western music theory was from the palace to the church, then to the school, and, finally, to the society, which made the music theory teaching in China gradually develop into a major and minor system as the leading mode. The basic theory of Chinese Music gradually deviated from its own track. With the deepening of music research after the founding of the People’s Republic of China, the discipline development of basic music theory has witnessed a prosperous situation, and the construction of basic music theory is moving towards the direction of diversification and deepening. Many musicologists and music educators have made contributions to the construction of basic music theory in China from different disciplines and research perspectives. Based on the principle of “combining history with the theory” and combing the development of basic music theory in China, the ideal model of Chinese music theory discipline construction is conceived to promote the integration between traditional music theory and modern music theory from a diachronic perspective What is relevant to strengthen the unity of the nation and the world in basic music theory from a synchronic perspective, and to pay attention to the connotation of technology and culture in music theory teaching. But also to strengthen the scientific and logical concept in music theory textbooks.

Efficiency coefficient of tractor wheel drive while moving on ground

Purpose. The purpose of the study is to improve the energy efficiency of tractors when working on a deformable support surface by increasing the efficiency of the wheel drive due to the rational selection of its parameters. Methods. The methods of the theory of movement of traction vehicles and theoretical mechanics are used. Results. Analytical equations are compiled that describe the dependence of the interaction of wheels with pneumatic tires with the ground support surface. The effect of tangential soil compliance on the efficiency of a single wheel and wheel drive was determined, and the influence of soil compliance was taken into account to determine the rational distribution of torque (traction) moments between the driving axles of a two-axle tractor. Conclusions 1. As a result of the conducted research, the dependence of the coefficient of useful action of the tractor's wheel drive on the coefficient of distribution of torque (traction) moments between the axles during movement on a deformable support surface was determined. The resulting mathematical model takes into account both the circular stiffness of the tires of the driving wheels and the flexibility of the soil in the contact patch. 2. The rational (optimal with the adopted mathematical model) value of the torque distribution coefficient βm between the axles should vary depending on the rolling resistance of the driving wheels and the characteristics of the soil background. With an electric drive of the driving wheels, adjustment of the coefficient βm is possible, and with a mechanical drive of the driving wheels, control of the coefficient βm can be carried out by adjusting the ratio of torsional stiffnesses of the tires of the front and rear wheels due to their internal pressure. 3. For agricultural tractors it is advisable to adjust the air pressure in the tires for each bridge separately, depending on the type of running system(4K4a, 4K4b) and the physical condition of the soil. Keywords: wheel drive, two-axle tractor, coefficient of useful action, deformation of the support surface, traction moments.

ASSESSMENT OF IRRIGATION AND WATER QUALITY INDICES OF INDUSTRIAL EFFLUENT AND SURFACE WATER IN ALETO ELEME, RIVERS STATE

x The study assessed the irrigation water quality indices of industrial surface water in Aleto Eleme, Rivers State, Nigeria. A total of 9 samples of water effluents and surface water were collected and taken to laboratory to test for the level of concentrations of the physico-chemical parameters using standard laboratory analyses as recommended by the American Society for Testing and Materials for physico-chemical properties and descriptive statistics were employed for the data analysis. Findings revealed that Sodium Absorption Ration (SAR) values ranged from 0.32 to 12.39; Soluble Sodium Percentage (SSP) values ranged from 23.39 to 80.62; PI values ranged from 24.79 to 889.8; KR values ranged from 0.39 to 4.16, Residual Sodium Carbonate(RSC) values ranged from -585.3 to 9.9. Also, the different classes of salinity hazard in the USSL diagram include low, C1 (EC < 250 μS/cm); medium, C2 Electrical Conductivity (EC 250–750 μS/cm); high, C3 (EC 750 -2250 μS/cm); and very high, C4 (EC > 2250 μS/cm), as shown in figure 4. Also, the sodium hazard classes include: low, S1 Sodium Absorption Ratio (SAR < 10); medium, S2 Sodium Absorption Ratio (SAR 10 -18); high, S3 (SAR 18–26); and very high, S4 (SAR > 26). Thus, the quality of river water in the area had WQI values (WQI > 300), rating the water as unsuitable for drinking. The study recommended that the water quality should be improved for domestic purposes by making sure that regulatory bodies monitor the level of water pollution everywhere in Rivers State. More studies on water quality should also be conducted periodically.

Criticism of the Philosophy of Dual Isomorphism of Explicit and Implicit and Its Evolution Law: An Interpretation of Yang Jiyong's Thesis and Works from Literary and Artistic Viewpoints

To evaluate whether the book "Literary Aesthetics from the Perspective of Explicit and Implicit Philosophy" and its related papers have academic rationality and theoretical value, this article relates to theoretical foundations of Liu Xie's "Wen Xin Diao Long", Taoist thought in the pre-Qin period, classics in the Han Dynasty and Wei and Jin Dynasties, and The Six Dynasties Metaphysics and so on. Adopting specific methods such as induction and deduction, analogy analysis and synthesis, and the combination of theory and history, it is discovered that the theory of explicit and implicit binary isomorphism (as well as its evolution and hidden theoretical composition), the view that it emphasizes the way things are spoken and the pursuit of clarity must also be based on the hidden as the source, the aesthetic diagram of the relationship between life vitality and the hidden, the research methods that emphasizes the metamorphosis of metaphoric light and dark, embodying the real possibility of poetry, and confirming the invisible origin of all things are related to modern natural science do have certain theoretical and practical enlightenment value. For example, it shows that it has theoretical significance for exploring, arguing, summarizing, and inheriting the clues of Chinese traditional culture and the essential characteristics of history, and it has the highlight and enlightenment of the essence of historical philosophy; so, it can be seen that the academic circles highly value this monograph, indicating that attention to and in-depth criticism are both very necessary.

On wavelet type generalized Bézier operators

This paper deals with construction and studying wavelet type generalized Bézier operators by using the compactly supported Daubechies wavelets of the given function $ f $. The basis used in this construction are the wavelet expansion of the function $ f $ instead of its rational sampling values $ f\left( \frac{k}{n}\right) $. By using the Chanturiya modulus of variation we estimate the rate of pointwise convergence of $ \left( WB_{n, \alpha }f\right) (x)\ $at those $ x>0 $ at which the one-sided limits $ f(x+) $, $ f(x-) $ exist.Clearly our wavelet type operators contain at least classical version, Durrmeyer and the Kantorovich form of the generalized Bézier operators and hence our results extend some of the previous results on generalized B ézier operators, such as [1], [11] and [12].

Three-dimensional analysis of the stress-strain state for straightening pipes on skew-roll straightening machines with special roll profiling

In order to increase the competitiveness of domestic metal products, in particular pipes, it is necessary to ensure their compliance with international standards in terms of the main quality indicators. The pipe straightening process provides quality indicators such as straightness and cross-sectional shape. Skew-roll pipe straightening machines are the most common and most effective for straightening pipes of small and medium diameters. The most modern are six-roll pipe straightening machines with special roll profiling, which provide straightening of two types: in the caliber of the profiled rolls and at the step between the roll clamps. But the lack of knowledge about the regularities of straightening pipes holds back the wide implementation of such machines. In the work, a finite element model was developed and with its use, a study of the influence of the straightening process parameters in profiled rolls with symmetric and asymmetric profiling of the extreme pairs of rolls on the indicators of pipe straightness and straightening force was carried out. According to the results of their implementation, it was established that straightening the pipe in gauge and pitch allows to reduce the residual curvature of the pipe by almost three times with a 2.5 times smaller overlapping of the middle rolls relative to the outer ones. At the same time, the force on the most heavily loaded middle rolls increases almost twice, which should be taken into account in view of the possibility of ovality in the section of thin-walled pipes. The use of additional asymmetric profiling of the extreme rolls with step adjustment practically does not affect the quality of straightening in the gauge, increases the quality of straightening at the step by up to 15 %, while reducing the maximum straightening force by 5—7 %. The developed finite-element model allows determining the rational values of rolls overlaps to ensure the minimum residual curvature of the pipes.

Исследование качества протеинового батончика для спортивного питания с рыбными белковыми добавками

The quality of a new protein bar for sports nutrition, enriched with fish protein supplements, obtained by hydrolysis of fish scales, was investigated. The objects of the study were two types of protein supplements and the finished product. The paper explores the main indicators of the bar quality. The mass fraction of moisture, fat, and ash was determined according to GOST 5900-2014, GOST 31902-2012 and GOST 5901-2014, the amino acid composition was determined by ion-exchange chromatography, and the mineral composition was determined by atomic absorption spectrometry. The biological value of the additives’ protein and the finished product was determined by the calculation method, structural and mechanical characteristics – using a Brookfield CT3 texture analyzer, organoleptic indicators – on a 100-point scale, microbiological indicators – by standard methods. The peptide-protein and protein-mineral supplements contained 98.8% and 54.1% protein, respectively. The second supplement contained calcium and phosphorus, respectively, 22% and 12%. The amino acid composition of the bar showed the presence of all essential amino acids and glycine, proline, alanine, which are important for the athletes. The mass fraction of protein in the finished bar was 23.5%, which is adequate to 24% of its total energy value and corresponds to high-protein sports nutrition products according to GOST 34006-2016. It has been proven that a bar weighing 60 g is functional in terms of the content of calcium and phosphorus (satisfaction with the daily norm by 44% and 31.4%, respectively), vitamin E and dietary fiber (satisfaction by 22.4% and 58%). The organoleptic analysis revealed its positive perception in all respects and the absence of a fishy aftertaste; the total scoring of the product was 85.75 points. Rational values of rheological parameters were established: limiting shear stress 20–25 kPa, adhesion 200–220 mJ, penetration number 4.7–5.2 mm, elastic modulus 0.08–0.1. According to the results of microbiological studies, the shelf life of protein bars was 28 days.

Wind Turbine Fault Detection With Multimodule Feature Extraction Network and Adaptive Strategy

Unexpected failures in wind turbines (WTs) lead to tremendous economic losses and safety hazards to wind farms. Intelligent condition monitoring and fault detection can prevent unscheduled downtime and improve reliability and efficiency. However, the variational external environments and operation states result in time-varying correlations and fluctuations of variables, which pose challenges to precise modeling and detection for WTs. This article proposes a dual-stage temperature monitoring and fault detection method, which can be applied to multiple key components in WTs. First, a novel multimodule feature extraction network (MMFENet) is designed to model the normal behavior of temperature data in the monitoring component. The proposed model decomposes the correlations into distinct patterns and devises different modules for quantification. Specifically, the static module aims to characterize the stationary correlations resulting from the inherent structure to provide reference expectations of fluctuations in the dynamic module and accelerate the model training. The dynamic module is devoted to depicting time-varying interdependence caused by variational operation states to pursue precise modeling. In addition, the proposed network also uses a heterogeneous data fusion module to use external information. Second, an adaptive detection strategy is devised for converting the prediction errors into detection results. Based on the evaluation results in the training procedure, parameter ranges during online detection can be adaptively determined to contain multiple rational values, which can enhance robustness and scalability. Experimental results using field data from real wind farms demonstrate the effectiveness and superiority of the proposed method.

RESEARCH OF THE IMPACT OF KINEMATIC AND GEOMETRIC CHARACTERISTICS OF BUCKETLESS ROTARY WORKING BODIES OF TRENCH EXCAVATORS ON THE ENERGY INTENSITY OF SOIL EXCAVATION

This article delves into the determination of the physical essence of the working process of bucketless rotary working body in longitudinal digging excavators and the rational choice of their kinematic and geometric parameters. The research was conducted using a physical-mathematical modelling stand for continuous-action earthmoving machinery processes, with a physical model of a bucketless rotary working body of a trenching excavator manufactured at a 1:5 scale. The study explores and elucidates the physical nature of trench excavation using a bucketless rotary working body. The process of soil development involves the extraction of soil chips by the rotor from the mass, the movement of the excavated soil into the internal annular cavities of the rotor, jamming the mentioned soil mass in these cavities, and lifting the soil concentrated in these voids to the unloading node of the rotor through the frictional forces of the soil on the working surfaces of the rotor and soil unloading. The transport of the excavated soil by the rotor for unloading is carried out in a continuous flow, rather than in separate portions, as is the case with the working bodies of traditional design. Forced unloading of soil from the rotor using two-stage unloading nodes allows for effective soil development over a wide range of cutting speeds and fully utilizes any power capacity of the machine's power plant. This advantage of bucketless rotary working bodies in trenching excavators over other traditional designs of working equipment is unique. An analysis of the obtained results of experimental studies of the physical model (1:5 scale) of the bucketless rotary working body of the excavator enabled the determination of the energy intensity of soil excavation, the range of possible changes in the productivity of trenching excavators with bucketless rotary working bodies when changing machine operating modes. It has been proven that the energy intensity of soil excavation with bucketless rotary working bodies is in the range of 0.25…0.30 kWh/m³. Rational values of the constructive parameters of the rotor, namely the width of the rotor's cross-arms and the angle of their installation on the central disk of the rotor, have been established as the main constructive parameters of the rotor.

Improving the SWAG-technology with the use of pump-ejector systems

A set of technical solutions for improving the SWAG-technology using pump-ejector systems is proposed. To effectively influence the reservoir, it is necessary to implement the injection of a water-gas mixture into wells that open reservoir sections with the largest residual reserves (into wells with maximum reserves – a mixture with the highest gas content from the range of rational values). In this case, associated gas, nitrogen, can be used as a source of the gas phase. A description of the pump-ejector system for the use of associated gas from the annulus of production wells is also given. For the efficient operation of the system, it is necessary to select the elements of the system that will be operated with maximum efficiency under field conditions. The results of experimental studies of ejectors are presented: the efficiency of the ejector is directly related to the mineralization of the working fluid, as well as the inlet pressure.

Interplay of harvesting and the growth rate for spatially diversified populations and the testing of a decoupled scheme.

The loss and degradation of habitat, Allee effects, climate change, deforestation, hunting-overfishing and human disturbances are alarming and significant threats to the extinction of many species in ecology. When populations compete for natural resources, food supply and habitat, survival to extinction and various other issues are visible. This paper investigates the competition of two species in a heterogeneous environment that are subject to the effect of harvesting. The most realistic harvesting case is connected with the intrinsic growth rate, and the harvesting functions are developed based on this clause instead of random choice. We prove the existence and uniqueness of the solution to the model. Theoretically, we state that, when species coexist, one may drive the other to die out, so both species become extinct, considering all possible rational values of parameters. These results highlight a worthy-of attention study between two populations based on harvesting coefficients. Finally, we solve the model for two spatial dimensions by using a backward Euler, decoupled and linearized time-stepping fully discrete algorithm in a series of examples and observe a match between the theoretical and numerical findings.

The transformed value of teacher education policy on the characteristics and examinations in China

This paper mainly reviews the history of value change Of teacher training policy In China, specifically, and summarizes the basic characteristics of value change Of teacher training policy in China, namely, national-oriented value orientation, service social-oriented value orientation, tool rational value orientation and humanistic value orientation. On this basis, the value orientation of teacher's educational policy must be based on people, consistent with the principle of maximizing the benefit of the policy.

ANALYSIS OF THE INFLUENCE OF THE DISPLACEMENT OF THE GEAR RACK PROFILE OF THE PAIR EVOLUTION GEARING ON THE QUALITY INDICATORS OF THE TRANSMISSION

The article is devoted to the study of the influence of the modification of the paired evolute gearing with convex-concave contact on the quality indicators of transmission, namely, the contact pressure and the speed of slippage in the engagement. Previous studies of evolute gears showed the presence of characteristic zones on the side surface of the tooth, which have worse values of quality indicators than in similar involute gear. One of the ways to remove these zones or to reduce their impact on the load capacity of the transmission is to modify the tooth profile, which will be implemented by shifting the profile of the processing gear rack. A displacement factor is added to the equation of the rail profile curve, which has the same value for the gear and wheel teeth, but the opposite sign. On the basis of the developed equation, the side profiles of the teeth of the gear and the wheel were constructed. Several values of the rack displacement coefficient with a positive and negative sign for the gear teeth are considered. The results of the research allow us to evaluate the influence of the amount and direction of the rail displacement on the curvature of the tooth profiles, the contact pressure in engagement along the height of the tooth, and the relative and absolute speed of sliding. The modifications of the profile of the processing toothed rack proposed in this work will expand the existence of paired evolute gears with a different set of quality indicators. This will make it possible to design gears with rational values of contact pressures and slip speeds when they are used in heavily loaded transmissions created for specific operating conditions. Gears with relatively high slip speeds can be used in road and construction equipment transmissions, which are characterized by low shaft rotation frequency, in which the speed of slip between the teeth does not have a significant effect on the life or efficiency of the transmission. Otherwise, gears with relatively low slip speeds are very relevant when they are implemented in the transmission of modern and promising vehicles with a hybrid or fully electric power unit, especially in the case of passenger cars with high-speed electric motors.

Substantiation of environmentally safe modes and parameters of operation of mineral processing waste storage facilities

The subject of the paper is the modes and parameters of operation of mineral processing waste storage facilities. Liquid waste storage facilities that accumulate processing products and mine water from several mining enterprises are considered, taking into account climatic factors of influence, technological limitations on the volume of waste. The analysis of the main results shows that environmental safety in the operation of waste storage facilities is based on two principles: to prevent waste overflow over the edges of the embankment dam and to provide a protective layer of liquid over the bottom, which is formed from particles of dusty and clay fractions. The purpose of the study is to scientifically substantiate the possible modes of operation of liquid waste storage of mineral raw materials processing and mining, as well as the creation of methods for calculating their maximum possible volumes entering the storage during the year, taking into account environmental safety. The study used the methodology of logistic systems, in the framework of which storage facilities are considered as a node of accumulation, and its model includes a system of equations describing the height of the water mirror and the bottom level depending on the volume of placers from the water volumes that entered and withdrawn from it during the period of operation, which is analyzed, taking into account the geometric features of the storage bowl. As a result, a mathematical model of liquid waste storage, which accumulates processing products and mine water from several mining enterprises, has been developed, taking into account climatic factors of influence, technological limitations on waste volumes. This model allows to determine the level of the free surface mirror in any month of the year, as well as to calculate changes in the current height of the free surface mirror in the storage for any period of time. On the basis of these formulas and ecological safety requirements at operation of artificial storages of wastes from processing of mineral raw materials the restrictions on volumes of wastes which enter the storage during a year, or during spring months have been received. The use of these restrictions allowed to determine and justify the rational values of capacities on salable concentrates of mining enterprises, duration of their downtime for a certain period of the year. Keywords: storage of mineral processing waste, height of the water mirror, environmental safety of operation.

Manévrovateľnosť a stabilita pohybu kĺbového autobusu, systém HST

The mathematical model of a hinged-rear bus with a system of turning a hook-and-loop section for a dynamic way of turning is broken down. For the developed model, indicators of manoeuvrability and stability of the bus were appointed. The input of the design parameters of the bus and the trailer, the transfer ratio of the control drive and the magnitude of the galvanic moment to the indicators of the manoeuvrability of the bus are analysed. On the basis of the results, in the analysis of the rational values of the gear ratios, which ensure the proximity of the trajectories of the characteristic points of the bus and the trailer, the value of the gear ratio of 0.85 was selected, which ensures the minimum value of the RMK.

Щодо надійності технологічного процесу подрібнення пожнивних решток

The article is devoted to finding ways to solve the problem of increasing the reliability of the technological process of shredding crop residues using shredding rollers with operating parts in the form of knife drums. The research presents a review and analysis of existing types of machines for shredding crop residues equipped with driven and non-driven active operating parts with their advantages and disadvantages. The ways and methods that should be considered when solving problems of improving the quality of grinding and reliability of this technological process are formulated. The article presents the content and methods of conducting experimental field studies of the process of shredding crop residues by a drum with knives installed on its surface at a certain angle of deflection between adjacent rows and with a shift of the line of row blades relative to the axis of the drum itself. It is proved that at certain values of these parameters, it is possible to achieve a significant increase in the reliability of the technological process, to virtually eliminate the negative phenomenon of clogging of the inter-row space with particles of plant stems and soil. The rational values of the angles of the knives on the surface of the chopping drum, substantiated in this work, allow increasing the intensity of chopping crop residues as a result of reducing the distance between the rows of knives. Thus, the approximate length of the particles of chopped plant stems can be reduced from 21.4 cm to 17.4 cm, without negative consequences for the reliability of the technological process.