The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In time series analysis, signal processing, and financial analysis, simple moving average (SMA), weighted moving average (WMA), exponential moving average (EMA), exponential weighted moving average (EWMA), and Kalman filter are widely used methods. Each method has its own strengths and weaknesses, and the choice of method depends on the specific application and data characteristics. It is important...
Taking into account the peculiarities of using the MAX86150 evaluation system for measuring ECG and PPG signals, mathematical models were developed for indirect determination of systolic and diastolic pressure using fingers on the hand, which were tested in the MATLAB environment. Received ECG and PPG signals. Based on the proposed mathematical models, ECG and PPG signals were processed in the MATLAB...
The paper considered the theoretical information of generators for several power sources, schematic theirsolutions, and the main disadvantages and advantages. A generator for 4 batteries based on field-effect transistors with optical galvanic isolation and a clock generator built on the basisof the Atmega328 microcontroller, which is part of the Arduino Uno device, was studied. The result of the study...
The article deals with the problems of increasing the efficiency of enterprises and developing a system for assessing the rating of employeesof an enterprise. Aspects of motivation for compliance with standards by employees and structural divisions are also considered; they were studied because employees are the main driving force of any enterprise. In order to properly evaluate it, many companies...
The article describes new approaches to creating an autonomous compact system with automatic control for hemodialysis. It is proposed to organize a closed circuit for cleaning the dialysis solution using an electrolytic regenerator as a function of the concentration of urea in it. The functional diagram of the created system is presented and described. To power the regenerator, ensure thermal stabilization...
Road accidents are concerningly increasing in Andhra Pradesh. In 2021, Andhra Pradesh experienced a 20 percent upsurge in road accidents. The state's unfortunate position of being ranked eighth in terms of fatalities, with 8,946 lives lost in 22,311 traffic accidents, underscores the urgent nature of the problem. The significant financial impact on the victims and their families stresses the necessity...
The design of machines with permanent magnets is actively developing day by day and is often used in wind energy. The main advantages of such variable speed drives are high efficiency, high power density and torque density. When designing a wind generator with two rotors and permanent magnets, it is necessary to solve such a problem as the correct choice of the number of poles and slots to increase...
The object of research is the development of a specialized measuring information system for the study and control of relaxation processesin materials and technical systems.The purpose of the work isthe use of computer technologies to eliminate routine operations associated withthe processing of experimental data, increase the speed, accuracy and information content of the process of studying the control...
The scheme of dynamic management of traffic and activity of message sources with different priority of service is considered. The scheme is built on the basis of the neuroprognostic analysis model and the gradient descent method. For prediction and early detection of overload, the apparatus of the general theory of sensitivity with indirect feedback and control of activity of message sources is used...
This article introduces an enhanced energy management strategy that employsthe state of charge (SoC) of batteries in standalone DC microgrids with photovoltaic (PV) modules. Efficient energy management is crucial to ensure uninterrupted power supply to the load units inmicrogrids. To address the challenges posed by external factors such as temperature fluctuations and variations in solar irradiance,...
Breast cancer causes a huge number of women’s deaths every year. The accurate localization of a breast lesion is a crucial stage. The segmentation of breast ultrasound images participates in the improvement of the process of detection of breast anomalies. An automatic approach of segmentation of breast ultrasound images is presented in this paper, the proposed model is a modified u-net called Attention...
This paper presents the research results on the design of a three-dimensional head phantom for cone beam projection. The head model is based on a Shepp-Logan mathematical head model, which is used to simulate the operation of the CT scanner. The model is then compared with the reference data for structural similarity, reasoning, and shape. The geometric parameters of the obtained images are investigated...
The article presents the concept of a hybrid propulsion unit for ultralight aircraft. A combustion unit and an electric motor/generator were presented. As part of the research, a dedicated combustion engine controller and a two-way converter for energy conversion were built. The prototype drive unit was installed on a test stand and its initial characteristics were determined. The results of research...
A method of forecasting the balance of electricity consumption of urban development objects, civil purposes using discrete macromodels is proposed. We consider the power supply system (PSS) of the district, which is characterised by power supply from general-purpose power grids, as well as having its own generation of electricity from renewable energy sources (RES). Such a local electric power system...
This study aimed to differentiate individuals with Parkinson's disease (PD) from those with other neurological disorders (ND) by analyzing voice samples, considering the association between voice disorders and PD. Voice samples were collected from 76 participants using different recording devices and conditions, with participants instructed to sustain the vowel /a/ comfortably. PRAAT software was...
In the field of computer game development, there are numerous optimization methods that help to significantly reduce the number of calculations that the game system performs while playing the game. In its turn, this allows to display increasingly realistic graphics. The paper presents the performed analysis of general optimization methods used in the game engine Unreal Engine, such as Distance Culling,...
The article presents the impact of individual settings of both 3D printers and software dedicated to the preparation of printouts. 3D printing methods are discussed. The individual methods and tools necessary for the implementation of 3D prints are described. Materials that are used in 3D printing technology are also discussed. In addition, the construction of printers on which the samples for the...
In the article themodel of light reflection based on the combination of two cubicbidirectional reflectancedistribution functions is developed.The main components of color and the main requirements for reproducing the object`s glaresareanalyzed. The usage characteristicsof Cook-Torrance, Bagher, Oren-Nayar, coupled Shirley reflection models are described. The advantages and disadvantages of the highly...
In this paper we share our experience with remote software updates for NB-IoT devices. The experience was collected over the years, when managing a fleet of tens of thousands of NB-IoT wireless sensors deployed worldwide by our customers. The paper discusses the main concerns that must be taken into account when designing the remote software over the air (SOTA) update mechanism, describes the remote...
In modern times, solar panels have become a common sight in many households as they provide electricity for various purposes. Typically, the solar panel's charges a battery, and any excess energy generated is usually wasted once the battery is fully charged. However, by utilizing this extra energy, heavy loads can be powered as well. This is where a solar power controller comes into play, which measures...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.