1,720,983 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Multi-Agent Planner and Smart Phone Service for Ad-Hoc Parcel Logistics
Get PDFPráce se zaměřuje využití technik umělé inteligence na konkrétní problematice přepravy zásilek. Zaměříme se přepravce, který vlastní vozový park a řeší jakým způsobem efektivně přepravovat zboží s možností vyzvedávat zásilky kdekoliv v daném regionu. Pomocí technik multi-agentní kooperace se dá takový problém efektivně automatizovat a~zároveň optimalizovat s ohledem na minimalizaci ujetých kilometrů nebo úsporu paliva. Praktickým výstupem je prototyp volně konfigurovatelné serverové aplikace, která dokáže řešit zadaný logistický problém a jeho řešení podle potřeb odsimulovat. Pro potřeby klienta je vytvořeno komunikační rozhraní přijímající požadavky na přepravu balíků, které je možné odesílat z poskytované mobilní aplikace.This work is focused on the way to utilize Artificial Intelligence techniques to solve concrete parcel transport problem. Let us have a local transportation company which owns a certain number of cars and which is looking for an effective way of transporting goods in the region. Using techniques of multi-agent cooperation we can find a solution to create efficient automated delivery while optimizing traveled distances or spent fuel. Practical result of this work is a server application which is able to solve given logistic tasks and simulate results visually. This application is also prepared to provide restful API which receive requests from other client devices. We also provide a mobile application as an example of client device connection
Advanced PLC Programming Methods
No full textHlavním cílem této práce je využít přístup Modelově řízeného vývoje a Objektově orientovaného programování k vytvoření softwarového nástroje určeného k programování PLC. Hlavní funkcí vývojového nástroje je generování PLC kódu dle normy IEC 61131-3 z šablon, které představují reálné komponenty automatizované soustavy a dovolí nám vyižít vlastnosti Objektově orientovaného programování. Standard PLCopen XML, založený na technologii rozšiřitelného značkovacího jazyka, je použit jako na platformě a výrobci nezávislý způsob uchování generovaného PLC kódu. Vývojový nástroj je implementován v jazyce Java s využitím vývojového rámce Eclipse 4 Rich Client Platform.The main goal of this thesis is to use Model-Driven Design approach and Object-Oriented Programming features to create a software tool for programming PLC control system. The primary function of the instrument of development is the automated generating of proper PLC code according to IEC 61131-3 from templates which represent models of real components of automated plant and let us use some of the Object-Oriented Programming features. PLCopen XML standard based on extended markup language technology, is used, as it represents a vendor and hardware platform independent way to storing generated PLC code. The development tool is implemented in Java language with using Eclipse Rich Client Platform development framework
Interpretation of Positive Detection of Out-of-Control State for Statistical Process Control
Get PDFDůležitým předpokladem mnoha aplikací metod strojového učení v reálném světě je vysvětlitelnost výsledků těchto metod. Proto je trendem vytvářet metody, které nejen fungují dobře, ale jsou také vysoce interpretovatelné. Tato práce se zabývá interpretací modelu One-Class Support Vector Machine aplikovaného v oblasti kontroly kvality. Konkrétně se problém interpretace zaměřuje na určení správných charakteristik kvality (QCs), které jsou příčinou statisticky nezvládnutého stavu stavu (OOC). Byly vybrány tři interpretační metody a porovnány pomocí tří navržených měr výkonnosti. Novinkou této práce je použití metody LIME, protože dosud nebyla použita na problém interpretace One-Class SVM. Nevýhodou této metody je, že uživatel musí určit, kolik charakteristik kvality způsobilo OOC, a LIME pak vybere ty, o kterých si myslí, že to jsou. Tento problém jsem vyřešil pomocí jednoduché heuristiky. Vyhodnocení ukázalo, že výsledky metody LIME jsou výrazně horší než výsledky zbývajících dvou metod, které jsou již pro problém interpretace v kontrole kvality používány. Nicméně toto bylo způsobeno mnou navrženou heuristikou nikoliv samotnou metodou LIME. To potvrdila i druhá sada experimentů, v níž byla interpretační metodě LIME poskytnuta informace o tom, kolik QC je třeba určit pro daný vzorek. V tomto případě byly výsledky mnohem slibnější i v kontextu zbylých metod. Metoda LIME se jeví perspektivně pro interpretaci v oblasti kontroly kvality, nicméně je třeba nahradit zmíněnou heuristiku, která určuje kolik QCs je třeba najít, aby byla metoda LIME použitelná v praxi.An important assumption for many real-world applications of machine learning methods is the explainability of the outcomes of such methods. Therefore, the trend is to create methods that not only perform well but are also highly explainable. This thesis deals with the interpretation of the One-Class Support Vector Machine model applied to quality control. Specifically, the interpretation problem focuses on determining the correct quality characteristics (QCs) that are responsible for a positive detection of an out-of-control state (OOC). Three interpretation methods were selected and compared using three proposed performance measures. The novelty of this thesis is the use of the LIME method, as it has not been applied before to the One-Class SVM interpretation problem. The disadvantage of this method is that the user has to determine how many quality characteristics caused the positive OOC detection, and then LIME estimates those that caused the OOC. I solved this problem using a simple heuristic. The evaluation showed that the results of the LIME method are significantly worse than the results of the two other methods that are already in use for the interpretation problem in quality control. However, this was due to the proposed heuristic, not the LIME method itself. This was confirmed by a second set of experiments, in which the number of QCs responsible for OOC detection was known and provided to the LIME method. Then, the LIME gave much more promising results even in the context of the other methods. The LIME method is promising for interpretation in quality control. However, a more sophisticated approach to finding the correct number of shifted QCs needs to be devised to make the interpretation method applicable in practice
Variations on the Author
Get PDF“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
Get PDFWe 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
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