1,720,960 research outputs found
Віртуалізація моделей технічних об'єктів управління в навчально-наукових задачах проектування систем управління
Full text linkThe problem of using virtualization technology imitation of models of technical control plants (CP) in the development of control programs for controller platforms (PLC) fieldbus of industrial automation. It is proposed a generalized concept of virtual plants automation (VPA). The structural elements of the VPA is virtual hardware automation and virtual simulation model of CP. As a means of drafting VPA in laboratory workshops offered utilized highspeed free software simulator PLC and programming language BASIC for CP. As an extension of the proposed concept is proposed virtualizated distributed control system, with members from several separate VPA and a virtual controller.Рассмотрена проблема использования технологии виртуализации имитационных моделей технических объектов управления (ОУ) при разработке управляющих программ для контроллерных платформ (ПЛК) полевого уровня промышленной автоматизации. Предлагается обобщенная концепция виртуальных объектов автоматизации (ВОА). Структурными элементами ВОА есть виртуальные технические средства автоматизации и виртуальная имитационная модель ОУ. Рассмотрен пример лабораторного практикума с использованием программного симулятора ПЛК и языка программирования BASIC. В качестве расширения предлагаемой концепции предлагается виртуализировать распределенную систему управления, в состав которой будут входить несколько обособленных ВОА и один виртуальный контроллер.Розглянуто проблему використання технології віртуалізації імітаційних моделей технічних об'єктів управління (ОУ) при розробці керуючих програм для контролерних платформ (ПЛК) польового рівня промислової автоматизації. Пропонується узагальнена концепція віртуальних об'єктів автоматизації (ВОА). Структурними елементами ВОА є віртуальні технічні засоби автоматизації та віртуальна імітаційна модель ОУ. Розглянуто приклад лабораторного практикуму із використанням програмного симулятора ПЛК та мови програмування BASIC. Як розширення запропонованої концепції пропонується ві-ртуалізувати розподілену систему управління, до складу якої входитимуть декілька відокремлених ВОА та один віртуальний контролер
Virtualization of models of technical plants in educational and research problems in the development of control systems
No full textThe problem of using virtualization technology imitation of models of technical control plants (CP) in the development of control programs for controller platforms (PLC) fieldbus of industrial automation. It is proposed a generalized concept of virtual plants automation (VPA). The structural elements of the VPA is virtual hardware automation and virtual simulation model of CP. As a means of drafting VPA in laboratory workshops offered utilized highspeed free software simulator PLC and programming language BASIC for CP. As an extension of the proposed concept is proposed virtualizated distributed control system, with members from several separate VPA and a virtual controller
Програмна модель генетичного оптимізатора ваг штучної нейронної мережі в LabVIEW
Full text linkPrombles in programming 2013; 3: 100-108У даній роботі представлена процедура моделювання та синтезу штучної нейронної мережі із використанням генетичного алгоритму. Як приклад штучної нейронної мережі обрано штучну нейронну мережу, що реалізує логічну функцію «XOR» (виключаюче АЛЕ). Синтез та моделювання виконано із використанням програмного забезпечення LabVIEW. Структура XOR-нейронної мережі – двошаровий персептрон із одним прихованим шаром нейронів, а навчання XOR-нейронної мережі відбувається класичним генетичним алгоритмом з турнірною селекцією.Prombles in programming 2013; 3: 100-10
Software model of genetic optimizer for regular neural networks in LabVIEW
No full textPrombles in programming 2013; 3: 100-10
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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