Light fields in the ocean

The problem of light fields in the ocean is in basic ocean optics. Twenty-six separate studies discuss: (1) the field of solar radiation in the ocean; (2) stationary and nonstationary light fields created in the sea by artificial sources; and (3) the use of optical methods to study biological and hydrodynamic characteristics of the sea

Information system of letting out chair

Рассматривается функционал отдельных модулей информационной системы выпускающей кафедры.It is considered functions of separate modules of information system of letting out chair

MATHEMATICAL AND COMPUTER MODELING OF AUTOMATIC CONTROL SYSTEM FOR HYDROSTATIC BEARING

The paper presents simulation results of hydrostatic bearing dynamics in spindle assembly of standard flexible production module with throttled circuit. The necessity of dynamic quality increase for automatic control system of the hydrostatic bearing with the use of correcting means in the form of RC-chains is shown. The features of correction parameters choice coming from the existence of the crossing connections in automatic control system structure are noted. We propose the block diagram of automatic control system of the hydrostatic bearing in Simulink working field and cyclic algorithm for determination program of RC-chain parameters implemented in MATLAB taking into account typical thermal processes for the finishing treatment. Graphic-analytical method for the correction parameters choice is presented based on the stability stock phase gradient for dynamic quality determination of automatic control system. Researches of the method estimability in case of using the standard metal bellow valve as the hydrocapacity for RC-chain are also carried out. Recommendations for the bellow valve choice are formulated. The check of dynamic quality indicators concerning transition processes calculated by means of the appropriate programs developed for MATLAB is performed. Examples are given for phase stability factor gradient schedules with partition of various areas of hydrostatic bearing dynamic quality for different frequencies of spindle rotation and procedure description of data cursor function application on MATLAB toolbar. Improvement of hydrostatic bearing dynamics under typical low loadings for finishing treatment is noted. Also, decrease of dynamic indicators for high loadings treatment in case of roughing treatment is marked

APPLICATION OF MACHINE LEARNING ALGORITHMS IN CONTROL SYSTEMS OF MOBILE ROBOTS BASED ON EXTERNAL VIDEO SURVEILLANCE

Рассматривается применение методов машинного обучения для создания системы управления мобильными роботами (МР) на основе внешнего видеонаблюдения. Предлагается подход, основанный на применении алгоритмов детекции и определения ключевых точек библиотеки YOLOv8.The application of machine learning methods to create a control system for mobile robots (MR) based on external video surveillance is considered. The approach based on the application of detection and pose estimation algorithms of YOLOv8 library is proposed

Идентификация человека по голосу для системы дистанционного обучения

This article is about identification of human voice and speech recognition. These developments can be applied in the field of distance education.Представлены различные технологии идентификации человека по голосу и распознания речи. Данные разработки могут быть применены в сфере дистанционного обучения

Into the Labyrinth: Tales of Organizational Nomadism

Labyrinths and mazes have constituted significant spaces for tales of transformation, from prehistoric designs through the myth of the Minotaur and the pilgrimage design in Chartres cathedral to contemporary novels and pictorial representations. Labyrinths and labyrinthine designs can also commonly be found in present-day organizations. This text, based on an ethnographic study as well as on an analysis of academic discourse, explores their significance as symbol and as physical structure. Drawing upon the notion of transitional space, it presents labyrinths as an indelible part of human experience, an archetype, and a sensemaking tool for understanding and explaining organizational complexity. The unavoidable presence of labyrinthine structures is presented as a counterpoise to the reductionist tendency towards simplification, streamlining and staying on-message, allowing or demanding space for reflection, doubt and uncertainty

Modelling of bio-optical parameters of open ocean waters

An original method for estimating the concentration of chlorophyll pigments, absorption of yellow substance and absorption of suspended matter without pigments and yellow substance in detritus using spectral diffuse attenuation coefficient for downwelling irradiance and irradiance reflectance data has been applied to sea waters of different types in the open ocean (case 1). Using the effective numerical single parameter classification with the water type optical index <i>m</i> as a parameter over the whole range of the open ocean waters, the calculations have been carried out and the light absorption spectra of sea waters tabulated. These spectra are used to optimize the absorption models and thus to estimate the concentrations of the main admixtures in sea water. The value of <i>m</i> can be determined from direct measurements of the downward irradiance attenuation coefficient at 500 nm or calculated from remote sensing data using the regressions given in the article. The sea water composition can then be readily estimated from the tables given for any open ocean area if that one parameter <i>m</i> characterizing the basin is known

Parameterization of light scattering for solving the inverse problem of determining the concentrations of the principal light scattering and absorbing admixtures in shelf waters

A method for estimating the water backscattering coefficient was put forward on the basis of experimental data of diffuse attenuation coefficient for downwelling irradiance and irradiance reflectance. Calculations were carried out for open sea waters of different types and the spectral dependencies were found ("anomalous" spectra) and explained. On this basis, a new model of light backscattering on particles in the sea is proposed. This model may be useful for modelling remote sensing reflectance spectra in order to solve the inverse problems of estimating the concentration of natural admixtures in shelf waters