Informacionno-technologicheskij vestnik最新文献

{"title":"Theoretical aspects of obtaining a helical surface from a thin strip during sheet stamping","authors":"М.Л. Скрябин","doi":"10.21499/2409-1650-2021-27-1-149-156","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-149-156","url":null,"abstract":"В статье рассмотрены теоретические аспекты получения винтовой поверхности из тонкой полосы при листовой штамповке. Также предложена модель для расчета компонентов напряженно-деформированного состояния полосы и отдельных технологических параметров. Для удобства расчетов предполагается, что полоса имеет достаточную длину и угол закручивания по всей длине полосы одинаков. Несмотря на значительные упрощения геометрического характера, задача о кручении полосы остается сложной, вследствие двумерности напряженного состояния, геометрической и физической нелинейности процесса деформирования. Ее дальнейшее решение целесообразно основывать на методе конечных элементов, ориентируясь на применение ЭВМ. Для замыкания системы уравнений, описывающих поведение дискретной модели полосы на шаге нагружения, необходимо связать напряжения и малые приращения деформаций в середине каждого элемента. Для этого используем теорию пластического течения, пренебрегая упругими составляющими деформаций вследствие их малости по сравнению с большими пластическими деформациями.\u0000 The article deals with the theoretical aspects of obtaining a helical surface from a thin strip during sheet stamping. A model is also proposed for calculating the components of the stress-strain state of the strip and individual technological parameters. For convenience of calculations, it is assumed that the strip has a sufficient length and the angle of twisting along the entire length of the strip is the same. Despite significant geometric simplifications, the problem of band torsion remains complex due to the two-dimensionality of the stress state, the geometric and physical nonlinearity of the deformation process. Its further solution should be based on the finite element method, focusing on the use of computers. To close the system of equations describing the behavior of the discrete band model at the loading step, it is necessary to relate the stresses and small increments of deformations in the middle of each element. To do this, we use the theory of plastic flow, neglecting the elastic components of deformations due to their smallness in comparison with large plastic deformations.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115027680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamics of cruise missile flight","authors":"А.Д. Донской, С.Е. Сабо, М.А. Щиканов","doi":"10.21499/2409-1650-2021-27-1-30-40","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-30-40","url":null,"abstract":"Рассматривается система уравнений динамики полета крылатой ракеты с учетом всех факторов воздействия на ее движение в атмосфере.\u0000 A system of equations for the dynamics of a cruise missile flight is considered, taking into account all factors affecting its movement in the atmosphere.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114993638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Research on the demand for reference legal systems in Russia using Power BI","authors":"Н.И. Царькова, Алексей Николаевич Тарасов","doi":"10.21499/2409-1650-2021-27-1-135-142","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-135-142","url":null,"abstract":"Основная цель статьи состоит в обработке больших данных, генерируемых компаниями, разрабатывающие справочные правовые системы. Задача заключается в визуализации количества клиентов, сегментированных по городам для исследования распространённости справочных правовых систем в регионе. В качестве инструмента обработки больших данных и визуализации полученных итогов используется продукт компании Microsoft - Power BI. Авторы анализируют уникальные значения количества клиентов, в зависимости от города и выявляют регионы с наименьшим количеством пользователей. В заключении были подведены итоги исследования и разработаны планы на дальнейшую работу с использованием полученных результатов.\u0000 The main purpose of the article is to process big data generated by companies that develop reference legal systems. The task is to visualize the number of clients segmented by city to study the prevalence of reference legal systems in the region. Microsoft's Power BI product is used as a tool for processing big data and visualizing the results. The authors analyze the unique values of the number of customers, depending on the city, and identify the regions with the lowest number of users. In conclusion, the results of the study were summarized and plans were developed for further work using the results obtained.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134136712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Heating of cryogenic fuel under forced fluctuations inside tank of the rockets propulsion system","authors":"В.А. Бершадский","doi":"10.21499/2409-1650-2021-27-1-16-23","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-16-23","url":null,"abstract":"Приведены анализ и обобщение результатов экспериментальных работ по прогреву криогенной жидкости, имитирующих условия работы системы топливоподачи двигательной установки, которые возбуждают колебания топлива в баке. Получены эмпирические зависимости для расчётного определения интенсивности прогрева компонента топлива и деформации поля температуры в объёме бака при вынужденных низкочастотных колебаниях поверхности раздела жидкой и газовой фаз.\u0000 The analysis and generalization of the results of experimental work on the heating of cryogenic liquid are expound, simulating the operating conditions of the fuel supply system of the propulsion system, which forced fluctuations of fuel in the tank.The empirical dependences for the calculated determination of the intensity of heating of the fuel component and the deformation of the temperature field in the tank volume are obtained on the forced low-frequency fluctuations of the liquid and gas phase interface.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123553272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Turbine flow meter with increased metrological reliability","authors":"Алексей Гладков","doi":"10.21499/2409-1650-2021-27-1-24-29","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-24-29","url":null,"abstract":"Рассматривается турбинный расходомер применяющийся в качестве элемента бортовой системы управления объектов космической, авиационной, судовой техники для контроля расхода рабочих жидкостей, в котором преобразование частоты в напряжение осуществляется путем сглаживания импульсов с постоянной вольт-секундной площадью, формируемых из сигнала магнитоиндукционного преобразователя. Величина площади задается с помощью генератора с кварцевой стабилизацией частоты и прецизионного стабилитрона. Показывается, что функция преобразования расходомера остается неизменной в течение всего срока эксплуатации. Описывается встроенная схема самодиагностики, обеспечивающая автоматизированную проверку метрологической исправности расходомера в процессе эксплуатации.\u0000 The article considers a turbine flow meter used as an element of the on-board control system of objects of space, aviation, ship equipment to control the flow of working fluids, in which the conversion of frequency into voltage is carried out by smoothing pulses with a constant volt-second area formed from the signal of a magnetic induction converter. The size of the area is set using a crystal oscillator with frequency stabilization and a precision zener diode. It is shown that the conversion function of the flow meter remains unchanged throughout the life of the meter. A built-in self-diagnosis circuit is described, which provides an automated check of the metrological serviceability of the flow meter during operation.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134290894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of time series using Big Data algorithms","authors":"А.И. Сотников","doi":"10.21499/2409-1650-2021-27-1-118-124","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-118-124","url":null,"abstract":"То, с какой скоростью человечество накапливает информацию ежедневно, и непредсказуемость завтрашнего дня показывают, что для прогнозирования временных рядов больших данных уже не хватает традиционных технологий и необходимы новые методы обработки. В связи с этим встает вопрос, какие методы возможно использовать в настоящее время для получения достоверного прогнозирования временных рядов больших данных?\u0000 The speed at which humanity is accumulating information on a daily basis and the unpredictability of tomorrow show that traditional technologies are no longer enough for forecasting big data time series and new processing methods are needed. In this regard, the question arises, what methods can be used at present to obtain reliable forecasting of time series of big data?","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134304629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematical modeling of the correlation function and the energy spectra of the noise modulation function","authors":"В.И. Воловач","doi":"10.21499/2409-1650-2021-27-1-77-92","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-77-92","url":null,"abstract":"Рассмотрены и проанализированы вопросы, связанные с математическим моделированием корреляционных функций и энергетических спектров функции помеховой модуляции. Показано, что при воздействии на сигнал узкополосной мультипликативной помехи в энергетическом спектре функции помеховой модуляции присутствует дискретная составляющая, мощность которой зависит от глубины фазовых искажений. При импульсно-флуктуационной модулирующей помехе с детерминированным тактовым интервалом энергетический спектр функции помеховой модуляции представляет собой сумму непрерывной и дискретной частей.\u0000 The issues related to mathematical modeling of correlation functions and energy spectra of the noise modulation function are considered and analyzed. It is shown that when a signal is affected by a narrow-band multiplicative interference, a discrete component is present in the energy spectrum of the interference modulation function, the power of which depends on the depth of the phase distortion. In the case of pulse-fluctuating modulating interference with a deterministic clock interval, the energy spectrum of the interference modulation function is the sum of the continuous and discrete parts.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129031333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Force kinematic analysis of the process of needle punching of woven preforms","authors":"Андрей Владимирович Чесноков, С.П. Черенков, Дмитрий Владимирович Чесноков","doi":"10.21499/2409-1650-2021-27-1-157-168","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-157-168","url":null,"abstract":"Описан процесс трансверсального армирования плетеных преформ иглопробивкой. Определен процесс взаимодействия иглы с оплеточными жгутами с учетом деформационных процессов изменения амплитуды переплетения и проскальзыванием жгутов плетеной структуры материала при введении иглы. Приведены экспериментальные данные сопротивления проникновению иглы в преформу и подложку.\u0000 The process of transverse reinforcement of woven preforms with needle punching is described. The process of interaction of the needle with the braiding cords is determined, taking into account the deformation processes of the change in the weave amplitude and the slippage of the cords of the woven structure of the material when the needle is inserted. Experimental data on resistance to penetration of the needle into the preform and substrate are presented.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131421304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematical criteria for the formation of a unified periodic time sequence of addresses of information sources in on-board measurement systems with software-controlled data collection","authors":"Александр Петрович Мороз, Г.Е. Полехина, А.И. Полехин","doi":"10.21499/2409-1650-2021-27-1-41-52","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-41-52","url":null,"abstract":"Рассматриваются математические критерии задачи корректного размещения адресов информационных источников в едином периодическом ряду команд опроса для бортовой телеметрии с программно управляемым способом сбора. Математическое описание задачи выполнено с использованием аппарата теории чисел, - сравнений. Предлагается и обосновывается дополнительный критерий и графическая модель процесса размещения адресов.\u0000 Mathematical criteria for the problem of correct placement of information source addresses in a single periodic row of polling commands for onboard telemetry with a program-controlled collection method are considered. The mathematical description of the problem is carried out using the apparatus of number theory - comparisons. An additional criterion and a graphical model of the address allocation process are proposed and substantiated.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123283457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of self-similar traffic of the infocommunication system","authors":"Т.С. Аббасова, А.А. Ганюшин, Ю.Н. Ганюшина","doi":"10.21499/2409-1650-2021-27-1-67-76","DOIUrl":"https://doi.org/10.21499/2409-1650-2021-27-1-67-76","url":null,"abstract":"Проанализированы характеристики трафика беспроводной инфокоммуникационной системы, доказано его самоподобие. Описана система имитационного моделирования исследуемого трафика. Разработаны способы совершенствования метода пропорционального распределения пропускной способности системы на основе ON/OFF-модели трафика. Усовершенствована и расширена ON/OFF-модель трафика. Предложен метод перераспределения пропускной способности на основе расширенной ON/OFF-модели трафика на входе в критический участок беспроводной инфокоммуникационной системы.\u0000 The characteristics of the traffic of the wireless infocommunication system are analyzed, and its self-similarity is proved. The system of simulation modeling of the investigated traffic is described. Methods for improving the method of proportional distribution of the system throughput based on the ON / OFF traffic model have been developed. The ON / OFF traffic model has been improved and expanded. A method of bandwidth redistribution based on an extended ON / OFF traffic model at the entrance to a critical section of a wireless infocommunication system is proposed.","PeriodicalId":424160,"journal":{"name":"Informacionno-technologicheskij vestnik","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131968818","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}