Timing Diagrams Research Articles

High-Throughput Molecular Dynamics Study and Turbidity Analysis on Clustering and Agglomeration of Cellulose Nanocrystals in Suspensions.

The dispersion of cellulose nanocrystals (CNCs) in suspensions determines the quality of the CNC-reinforced composites. Before being mixed into the composite matrix, stable suspensions must maintain a well-dispersed state, requiring proper design strategies to prevent agglomeration and precipitation. Considering the volume fraction, aspect ratio, and zeta potential, this paper proposes a coarse-grained model to simulate CNC clustering and an experimental program to observe accelerated precipitation of CNCs. High-throughput molecular dynamics simulations yield a diagram of clustering time plotted against aspect ratio, zeta potential, and volume fraction of CNCs. Turbidity analysis with centrifugation-accelerated tests shows that precipitation occurs only after clustering and agglomeration are completed and that centrifugation rarely accelerates clustering. Clustering of short chains instantly leads to agglomeration, whereas clustering of long chains features delayed agglomeration, which can be triggered by centrifugation. Zeta potential is found to be the most critical factor affecting clustering, agglomeration, and precipitation. The findings provide critical insights into the conditions that favor stable CNC suspensions, which are essential for preparing well-dispersed suspensions and improving the composite material performance.

Metallic Glass Nanoparticles Synthesized via Flash Joule Heating for High Performance Catalysis

Metallic glasses (MGs) are a class of amorphous metal materials with remarkable properties. By leveraging an abundance of uncoordinated active sites that can serve as catalytic regions, MGs can have high catalytic activity and long-term stability as compared to their crystalline counterparts. Conventional synthesis methods cannot produce nanosized MGs with precise control over composition, phase, and morphology. This work presents flash Joule heating (FJH) as a novel one-step approach to synthesize fully amorphous MG nanoparticles while enabling unprecedented control over these critical parameters. The rapid heating (up to 2505 K/s) and ultrafast cooling rates (up to 1485 K/s) in FJH surpass the critical rates required for glass formation in metal-phosphide alloys like Pd-P, Pd-Ni-P, and Pd-Cu-P, preventing crystallization. Characterization techniques such as SAED, XRD, and XPS have confirmed the amorphous nature and metallic states of the nanoparticles.Remarkably, FJH allowed precise tuning of ternary alloy compositions spanning wide ranges from Pd-rich to Ni/Cu-rich regimes, closely matching designed precursor ratios. The technique significantly expanded the glass formation region compared to conventional methods, accessing previously unattainable compositions like binary Pd3P. Moreover, FJH enabled control over particle size from 2.33±0.83 nm to 36.5±10.1 nm with narrow distributions by optimizing precursors, thermal profiles, and alloy chemistries. Incorporation of multiple elements facilitated smaller nanoparticle formation due to enhanced entropy, reduced melting points, and decreased surface tension.The amorphous MG nanoparticles exhibited outstanding electrocatalytic performance and remarkable stability superiorities over their crystalline counterparts. For the oxygen evolution reaction, Pd-Ni-P MGs displayed ultra-low onset potentials ~300 mV below pure Pd and retained stable activity over 60 hours, contrasting rapid deactivation of crystalline samples of the same composition within 1 hour. PdCoP MGs for methanol oxidation showed high reaction rates and resilience against activity decline during accelerated durability testing, unlike rapidly decaying crystalline variants. This FJH synthesis approach unlocks new opportunities to realize the full potential of MGs by expanding the compositional space of alloy systems with precise control over MG properties, unlocking potential future transformative catalysts.Figure 1: Schematics for (a) a traditional heating-cooling process and (b) the FJH process. (c) Illustration of temperature vs. time diagram of supercooled liquid alloys and glass transformation.(d) Ternary phase diagrams of the Pd-Ni-P and Pd-Cu-P systems. Figure 1

Justification Models of Organizational and Technical Support of Measures to Create Information Protection System of Informatization Objects

The relevance of the article is due to the need to protect information at all stages of creating an information system in the absence of appropriate organizational and technical support. To justify this kind of provision, mathematical models are needed that take into account the conditions and the random nature of the implementation of heterogeneous information processing processes in time at each stage, threats to its security and protection from these threats. The article discusses approaches to the development of such models based on the apparatus of flow theory and the theory of composite Petri ‒Markov networks, the possibilities of which for modeling the processes under study have not been previously considered. The purpose of the article. To reveal the content of issues related to the justification of organizational and technical support for information protection at the stages of creating an information system, to show the need and ways to quantify threats to its security and protection from these threats. For this purpose, the methods of functional and structural analysis, probability theory and flow theory were applied. In the course of solving the scientific problem, the relevance of substantiating the organizational and technical support of information protection at the stages of creating information systems is shown, descriptive models of its processing processes are developed, time diagrams of threat scenarios are given in the absence of protection measures and in the conditions of using preventive organizational and technical measures, indicators and analytical ratios for their calculation are proposed. The scientific novelty of the article consists in the fact that for the first time it examines the issues of organizational and technical support for information protection at the stages of creating an information system, examines the theoretical aspects of quantifying threats to its security and protection from these threats based on flow theory and prospects for applying the theory of composite Petri-Markov networks. Significance (theoretical). The conditions for the implementation of the studied processes and the possibility of applying the theory of flows and the apparatus of composite Petri–Markov networks for their modeling are established. Significance (practical). The results obtained in the work can be used to justify the organizational and technical provision of information protection at the stages of creating information systems of various organizations (both state and non-state), for which the implementation of threats at these stages may lead to damage to their activities.

A novel discrete memristive hyperchaotic map with multi-layer differentiation, multi-amplitude modulation, and multi-offset boosting.

In recent years, the introduction of memristors in discrete chaotic map has attracted much attention due to its enhancement of the complexity and controllability of chaotic maps, especially in the fields of secure communication and random number generation, which have shown promising applications. In this work, a three-dimensional discrete memristive hyperchaotic map (3D-DMCHM) based on cosine memristor is constructed. First, we analyze the fixed points of the map and their stability, showing that the map can either have a linear fixed point or none at all, and the stability depends on the parameters and initial state of the map. Then, phase diagrams, bifurcation diagrams, Lyapunov exponents, timing diagrams, and attractor basins are used to analyze the complex dynamical behaviors of the 3D-DMCHM, revealing that the 3D-DMCHM enters into a chaotic state through a period-doubling bifurcation path, and some special dynamical phenomena such as multi-layer differentiation, multi-amplitude control, and offset boosting behaviors are also observed. In particular, with the change of memristor initial conditions, there exists an offset that only homogeneous hidden chaotic attractors or a mixed state offset with coexistence of point attractors and chaotic attractors. Finally, we confirmed the high complexity of 3D-DMCHM through complexity tests and successfully implemented it using a digital signal processing circuit, demonstrating its hardware feasibility.

Equation of motion of split conductor of anchor section at icing in wind flow

The relevance of the examined problem is connected with the necessity to develop measures to combat conductor galloping and the design of power transmission lines (ETL). The purpose of the research – to analyse statistical observation data on conductor galloping and apply a mathematical model to determine the parameters of galloping, to develop effective measures to combat conductor galloping and to improve the design of power lines. A sophisticated mathematical model was developed using Mathcad software to analyze conductor galloping in overhead power lines. This model, based on the equations of motion, predicts various galloping parameters under different conditions such as wind speed, span length, and initial mechanical stress. Time diagrams were constructed to represent linear and torsional motions, revealing correlations between amplitudes and frequencies. A comprehensive statistical analysis was performed on wire characteristics and split phase parameters to evaluate their impact on galloping patterns. Numerical methods, including the Runge-Kutta method, were employed to solve the equations and compute time-dependent behaviors. Results were visualized through graphs and diagrams to facilitate interpretation. The results revealed that conductor galloping occurs at wind speeds between 5 to 18 m/s, with significant occurrences at temperatures from 0°C to -10°C. The study identified that conductor galloping occurs within a wind velocity range of 5 to 13 m/s, predominantly with wind orientations between 30˚ and 90˚. The analysis showed that the frequency of galloping closely matches the natural oscillation frequency at low wind speeds but diverges with increasing wind speed and span length. These findings provide insights into the conditions under which conductor galloping is likely to occur and can inform design and operational strategies for overhead power lines.

Revolutionizing JIRA Management with Artificial Intelligence: Streamlining Workflow Efficiency and Enhancing Project Outcomes

IT organizations are investing heavily on artificial intelligence (AI), though the value realization and areas of application of AI are still limited and not explored completely. Artificial intelligence applications are using large set of data to train the system to either generate new content or to predict the outcomes. Predictive analytics is used in agile management projects for budgeting, forecasting and capacity management. The article represents the use of cycle time and cumulative flow diagram metrics in ActionableAgile or JIRA to predict in agile development projects for forecasting of inflow of work and for the improvement of current work processes.

Fabrication Time Diagrams for In-Space Manufacturing of Large Reticulated Structures

Abstract In-space manufacturing (ISM), or the construction of structures from raw feedstock materials in the space environment, is a promising approach for building large, external support structures for future space missions. Most research and development on ISM to date has focused on ground-based or microgravity-based demonstrations of candidate fabrication processes; however, the combined design of the ISM spacecraft and the fabrication process has not been fully investigated. In this paper, we estimate the fabrication times for truss support structures subject to various spacecraft constraints, including the available fabrication power, the attitude control system (ACS) authority, and the avoidance of control–structure interactions. Using the key assumptions of (1) a fabrication process that sequentially extrudes struts, (2) a fixed spacecraft orientation, and (3) negligible effects of environmental disturbance torques, we generate fabrication time diagrams that depict the dominant constraints and estimates of the fabrication time for a range of dimensions. Our results indicate that for large, dense reticulated geometries such as the curved gridshell and tetrahedral truss, the angular momentum storage of the spacecraft ACS is the dominant constraint on fabrication time. Additionally, our results suggest the following strategies for reducing fabrication time: manufacturing with multiple spacecraft; using stiff, lightweight feedstock; maximizing fabrication power and ACS capability; and minimizing spacecraft bus mass. These strategies represent design tradeoffs, emphasizing how the design of an ISM spacecraft cannot be considered independently of the fabricated structure.

Pulsed Signal Duration Shaper with Adaptive Response Thresholds

His paper represents a shaper designed to restore the width of rectangular pulses transmitted over an open-optic (wireless) communication channel and having shape distortions in the form of amplitude modulation, pedestal and tightening of the front and decay. The principle of pulse width recovery is based on the formation of voltage comparator thresholds adaptive to changes in high and low pulse signal levels. Due to the use of sample-and-hold circuit (UVH - S/H circuit) in the circuit, the values of the input signal levels are stored in the previous half-periods. The threshold voltage of the comparator before its operation is formed as the output voltage of a resistive voltage divider into two inputs, one of which is supplied with the current voltage of the input signal, and the other with the voltage level of the signal recorded in the S/H circuit at the previous half-cycle of information pulses. The study presents the method for estimated error in pulse width formation from comparator bias voltages, S/H circuit and modulation changes in the shape of the information signal. The example provides quantitative estimates of the error. In the Micro Cap circuit modeling environment, a model experiment was performed, diagrams of the signal source and shaper models on ideal components and time diagrams of the device operation are presented. The operability of the device during the passage of a pulse signal with the above-mentioned shape distortions has been confirmed. A large depth of modulation of the input signal amplitude is allowed. The formative properties of the circuit are provided. The speed of the shaper is determined by the speed of the comparator and the S/H circuit. To reduce the error of the duration forming of information pulse signals, it is necessary to choose a voltage comparator and sample-and-hold circuit devices with minimal static errors.

Research of the Primary Electric Energy Storage System of a Traction Photovoltaic Module

Purpose. The main idea of the work is that the electric energy generated by photovoltaic installations is supplied in small parts to capacitive energy storage devices of low power, and then these «portions» of energy are supplied to one common, so-called traction storage device. The research is aimed at obtaining time diagrams of current and voltage changes in the proposed system. Methodology. A review of the world literature on the topic of work was conducted. The basis of this research is the analysis of transient processes in the electrical circuits of the system during the transfer of energy from the photovoltaic module to the traction capacitor under the influence of various control signals: series, parallel, combined. The main research method is computer simulation. The Scilab software environment was used to simulate the operation of the electric energy storage system. Findings. The relevance of the research and development of a primary electric energy storage system using a traction photovoltaic module has been proved. The key mathematical dependencies between the parameters of the constituent elements of electrical circuits are established. The structure of a site with electric energy storage with traction photovoltaic modules and a converter-pulse signal unit is proposed. The graphical characteristics of transient processes that occurred during the transfer of energy from low-power capacitive elements to a high-power capacitive element (traction capacitor) were obtained. Originality. For the first time, graphical dependences of energy transfer between system elements were obtained, which allows for a reasonable choice of the parameters of these elements. Also, for the first time, time dependencies describing the law of control of the process of energy transfer between system links were obtained, which will allow determining the rational modes of its operation. Practical value. The results of the research open up new opportunities in the research field in the development of large-scale experimental models of the maglev path structure in the case of the introduction of a system of distributed primary energy storage in a traction photovoltaic module.

REAL-TIME PARAMETRIC DIAGNOSTICS OF MARINE DIESEL ENGINES

Using modern high-performance microcontrollers with wireless interfaces, built-in ADC and low overall consumption, it is possible to develop a portable real-time parametric diagnostic system for marine engines. The system is based on the use of modern Android/iOS gadgets that receive information from sensors via Bluetooth and then make the necessary calculations and display charts and data in real time. The system being developed uses a combination of a gas pressure sensor in the working cylinder and a vibroacoustic sensor, which expands the diagnostic capabilities of marine diesel engines under operating conditions. This solution makes it possible to diagnose the fuel injection system, the valves control mechanism, as well as some other engine systems. In order to develop a portable diagnostic system for marine diesel engines, it is first necessary to solve the problem of analytically determining TDC, since such a system does not involve the use of special sensors for this. Parameters of irregular engine operation are considered, which can be calculated in real time using time diagrams of pressure and vibration. Methods for expressly assessing the stability of the functioning of the main engine systems by monitoring and analyzing a number of successive operating cycles are considered. To assess the unevenness of engine operation, a dispersion estimate of deviations of the main parameters is used. For a comprehensive assessment of engine stability in real time, the CII (cycle’s irregularity index) criterion is proposed. The assessment of fuel injection irregularity in the engine cylinder can be carried out by analyzing the phase fronts of the vibration signal of the injector. Coefficients for assessing the irregularity of fuel injection and gas distribution valves timing are also proposed, using dispersion analysis of vibrograms fronts. The data processing methods proposed in the article will make it possible to analyze the stability of operating cycles, as well as to perform optimal tuning of engine systems and monitor the results during operation.

Methods of Real-Time Parametric Diagnostics for Marine Diesel Engines

Abstract Using modern high-performance microcontrollers with wireless interfaces, built-in ADCs and low overall consumption, we develop a portable, real-time parametric diagnostic system for marine engines. The system is based on the use of modern Android/iOS gadgets that receive information from sensors via Bluetooth and then carry out the necessary calculations and display charts and data in real time. The system developed here uses a combination of a gas pressure sensor in the working cylinder and a vibroacoustic sensor, which expands the diagnostic capabilities of marine diesel engines under operating conditions. This solution allows for diagnosis of the fuel injection system, the valve train mechanism, and several other engine systems. In order to develop a portable diagnostic system for marine diesel engines, it is first necessary to solve the problem of analytically determining top dead centre (TDC), since such a system does not use special sensors for this. An algorithm for determining TDC is proposed here, based on an analysis of the measured pressure diagram rather than its derivative, which minimises the influence of digital and analogue noise. Our algorithm for determining TDC and subsequent data synchronisation is applicable in the absence of information about the actual compression ratio in the cylinder, which is a typical scenario for modern engines with variable valve timing. The algorithm also works under conditions of only approximate data on the charge air pressure, which are refined during the iteration process. A formula is proposed for determining the initial TDC position. Parameters for irregular operation of the engine are considered, and can be calculated in real time using time diagrams of pressure and vibration. Methods for expressly assessing the stability of the functioning of the main engine systems by monitoring and analysing a number of successive operating cycles are considered. To assess the unevenness of operation of the engine, a dispersion estimate of the deviations in the main parameters is used. To enable a comprehensive assessment of the engine stability in real time, the CII (cycle irregularity index) criterion is developed. The data processing methods described in this article provide an accurate estimate of the indicated power, due to the precise determination of TDC, thereby enabling an analysis of the stability of the operating cycles, optimal tuning of the engine systems, and monitoring of the results during operation.

STRUCTURE FEATURES OF MINIMUM FREQUENCY SHIFT KEYING SIGNAL MODEMS

The article discusses specific features of constructing modems for minimum frequency shift keying signals using various schemes with high noise immunity levels. An analysis of the formation of these signals and frequency modulation signals, which are orthogonal if enhanced, is provided, including quantitative indicators and comparative characteristics. Two schemes of minimum frequency shift keying signal demodulators (coherent and autocorrelation) are examined, including their comparative features. Operation principles of these demodulator circuits with the use of timing diagrams are described, requirements for the reference oscillator generators included in coherent demodulators are formulated, as well as the requirements for minimum frequency shift keying signals, which ensure the greatest noise immunity in autocorrelation demodulators of minimum frequency shift keying signals with binary signals quantization.

Обобщенная математическая модель радиосигнала в различных базисах

The purpose of this article is to develop a generalized mathematical model of a radio signal in various bases. The proposed model allows us to generalize the known models of radio signals in basis functions of sine/cosine, basis functions of spline characters, bases of spline-Vilenkin-Chrestenson functions, bases of spline-Pontryagin-Vilenkin-Chrestenson functions, etc., constructed on the basis of spline-algebraic harmonic methods analysis. For the generalized model, special cases are formulated for the considered spaces of basis functions. Block diagrams and timing diagrams are presented that explain the main stages of the formation and processing of radio signals in various bases. Using the simulation method in the Matlab environment, the noise immunity of the proposed radio signals was assessed. Analysis of the obtained results showed that radio signals generated on the basis of a generalized mathematical model in various noise immunity bases under AWGN conditions are comparable (and even have a slight advantage) with similar signals generated in the bases of classical exponential functions. An assessment of structural secrecy is presented. It is shown that the structural secrecy of radio signals generated in various bases is ensured by the formation of signals in a priori unknown bases, the parameters of which: group, ring, spline order and number of the basis function change in accordance with a given code word, also unknown to potential unauthorized processing systems. Structural secrecy manifests itself in the incorrect choice of basis when processing signal data for reception, which entails an expansion of the signal spectrum. As a result, incorrect estimation of signal parameters and incorrect setting of the demodulator occurs.

Performance Evaluation of Spaceborne Bistatic SAR Systems

In this paper, the performances of spaceborne bistatic synthetic aperture radar (SAR) systems are evaluated and compared with those of the conventional monostatic SAR system. Drawing on information on the altitude of satellites and the pulse repetition frequency of the system, the distance between the satellites carrying the transmitter and the receiver is first determined to then obtain the maximum observable width by overlapping the blind ranges. The performances of the bistatic SAR for two satellites at the same altitude moving parallel to each other at the same speed are evaluated, and the results are compared with those obtained from a monostatic SAR system located at left or right end of the baseline. The resolutions, noise equivalent sigma zero, and ambiguities of the bistatic SAR are evaluated based on the windows between blind incident angles of a timing diagram. Subsequently, the most ap-propriate window is determined by comparing the evaluated performances of the bistatic SAR.

Assessment of Traffic Safety in winter at Various Stages of the Road Life Cycle

Statement of the problem. The assessment of the accident rate and the influence of various road factors and work technologies on it is necessary to improve traffic safety. Accident rate assessment methods can be used at various stages of the highways life cycle. The reasonable choice of initial information is required for such calculations. Results. The analysis of existing methods for assessing traffic safety and the possibility of their use at various stages of the transport structures life cycle was performed. The stage of road operation and the most dangerous winter period for traffic were studied. Time diagrams for various winter maintenance technologies have been developed. Calculations to assess traffic safety by season of the year using the example of the specific road section with diagnostic data were made. Diagrams for the extent of sites with varying degrees of traffic hazard in different seasons of the year and for several road winter maintenance technologies have been created. Conclusions. Calculation results allow us to conclude that it is possible to use the proposed methodology for assessing accident rates at various stages of the highways life cycle.

Utilizing Group Model Building to Identify Barriers and Facilitators of Hypertension Management in Primary Health Care, China.

Group Model Building (GMB) is a qualitative method that refers to a participatory process. This project aims to identify barriers and facilitators of hypertension management in primary health care in China, through which, the leverage point for intervention may be found. The GMB was used to identify the factors influencing hypertension management. Graphs over time and causal loop diagram (CLD) were main tools of GMB. To propose the influencing factors, key stakeholders were invited to participate in a workshop. During the workshop, stakeholders were encouraged to plot the graphs over time of the variables about research issues and give a descriptive explanation. And based on this, a CLD was initially developed to establish a model of the interaction of factors. After the workshop, the research group further improved the CLD through repeated mutual discussions, and gave feedback to the participants. The Vensim PLE 9.0 software package was used to build CLD. A total of 14 key stakeholders were invited to participate in the workshop. Finally, 26 influencing factors were identified, which were divided into three dimensions, including the institutional, the community health workers (CHWs), and the patient level. And 5 reinforcing loops and 4 balancing loops were formed in the CLD. Promoting the building of the Medical Community/Regional Medical Association, implementing the family doctor contract service (FDCS), and enhancing the motivation of CHWs may be potential leverage points for hypertension management in China. By using GMB, we have identified key factors in the management of hypertension in primary health care and provided comprehensive suggestions to overcome the obstacles.

Питание однофазного асинхронного электродвигателя от преобразователя частоты

The article discusses ways to connect a single-phase asynchronous motor to an AC electrical network. Their comparative analysis is given. The option of powering a single-phase asynchronous motor from a frequency converter driven by the network is considered. A schematic diagram of the converter, a description of the principle of operation, a control algorithm and timing diagrams of operation for various modes are given. The advantages of using a frequency converter driven by the network for powering single-phase asynchronous motors are substantiated

Dynamical Analysis of Stochastic Predator-prey Model with Scavenger

In this paper, we studied the dynamic properties of predator-prey and scavenger three species system by using ergodic invariant measures. Pengyu Ma. find the five points of dynamical bifurcation of the stochastic model, which happened between extinction and survival of each species. Environmental noise was added and proved by the fact that driving force produced by environmental noise influence the system and it was find that system may extinct or partially extinct. Here, we have analysed the stochastic bifurcation phenomena of the prey-predator with scavenger system from the nature of dynamic bifurcation. The phase plots and time diagram plotted for the different values of parameters. We have verified all the results by numerical simulations.

A Novel Hierarchical Vision Transformer and Wavelet Time-Frequency Based on Multi-Source Information Fusion for Intelligent Fault Diagnosis.

Deep learning (DL) has been widely used to promote the development of intelligent fault diagnosis, bringing significant performance improvement. However, most of the existing methods cannot capture the temporal information and global features of mechanical equipment to collect sufficient fault information, resulting in performance collapse. Meanwhile, due to the complex and harsh operating environment, it is difficult to extract fault features stably and extensively using single-source fault diagnosis methods. Therefore, a novel hierarchical vision transformer (NHVT) and wavelet time-frequency architecture combined with a multi-source information fusion (MSIF) strategy has been suggested in this paper to boost stable performance by extracting and integrating rich features. The goal is to improve the end-to-end fault diagnosis performance of mechanical components. First, multi-source signals are transformed into two-dimensional time and frequency diagrams. Then, a novel hierarchical vision transformer is introduced to improve the nonlinear representation of feature maps to enrich fault features. Next, multi-source information diagrams are fused into the proposed NHVT to produce more comprehensive presentations. Finally, we employed two different multi-source datasets to verify the superiority of the proposed NHVT. Then, NHVT outperformed the state-of-the-art approach (SOTA) on the multi-source dataset of mechanical components, and the experimental results show that it is able to extract useful features from multi-source information.

ТЕОРЕТИЧЕСКОЕ ОБОСНОВАНИЕ ТЕХНОЛОГИЧЕСКОГО ПРОЦЕССА ПОСЕВА ДРАЖИРОВАННЫХ СЕМЯН САХАРНОЙ СВЕКЛЫ ВЫСЕВАЮЩЕЙ СИСТЕМОЙ ПНЕВМАТИЧЕСКОГО ДЕЙСТВИЯ

A promising direction in the development of seeding machine designs is the creation of pneumatic seeding systems based on jet pneumoautomatics. The introduction of seeding systems with automatic process control will allow us to obtain fundamentally new ways of programmed sowing of seeds, fertilizers, herbicides. The purpose of the study is to determine the dependence of the aerodynamic lift on the aerodynamic properties and size of the seeds, the vacuum in the suction cup, its size and the distance between the seed and the suction cup. A model is presented reflecting a program of sequentially performed operations aimed at dosing seeds with a single dosing element, including a suction cup and a cell. The continuous flow of the dosing process is ensured by superimposing the algorithms of the process of individual dosing elements with a time shift, which negatively affects the quality of dosing due to the tight connection of individual operations between the components. The analysis of the time diagram of the algorithms' functioning showed that even with a constant speed of the drill, the uniformity of seed dosing by pneumomechanical and mechanical seeding systems depends on changes in the sliding of the support and drive wheel due to different physical and mechanical properties of the soil and various loads arising when overcoming friction forces in the apparatus. The object of analytical research is the technological process of the pneumatic seeding system, its temporary modes of operation, their relationship with operational, structural and technological parameters, which mainly determine the quality of seed distribution at the bottom of the furrow. The aerodynamic lifting force in the seeding system was considered. Calculations have shown the presence of a directly proportional dependence of the aerodynamic lifting force on the aerodynamic properties and size of the seeds, the vacuum in the suction cup, and the size and distance between the seed and the suction cup.