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Algorytm identyfikacji własności dynamicznych czujników temperatury metodą korekcji dwutorowej
No full textTyt. z nagłówka.Bibliogr. s. 226.Dostępny również w formie drukowanej.STRESZCZENIE: W artykule opisano algorytm korekcji dwutorowej własności dynamicznych miniaturowych przetworników temperatury wykorzystującej sygnały z dwóch równoległych torów pomiarowych. Przedstawiono istotę metody oraz sposób jej implementacji w komputerowym systemie pomiarowym. Zaprezentowano również wyniki weryfikacyjne w odniesieniu do zmiennych w czasie sygnałów temperatury gazu, zarejestrowanych za pomocą miniaturowych czujników temperatury w przewodzie turbosprężarki zasilanym w sposób pulsacyjny. SŁOWA KLUCZOWE: identyfikacja własności dynamicznych, czujniki temperatury, korekcja dwutorowa. ABSTRACT: In the paper the identification algorithm of dynamic properties of temperature sensors by two chain correction method has been presented. Principles and practical applications of the correction method within computerized measuring system were discussed. Experimental results obtained for the time-varying gas temperature measurements performed using miniature temperature transducers in the turbocharger pipe supplied with pulsating gas flow have been given. KEYWORDS: identification of dynamic properties, temperature sensors, two-chain correction
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
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
A study of options to increase the power of internal combustion engines
Get PDFInstytut Maszyn Przepływowych Politechnika ŁódzkaInstitute of Turbomachinery, Lodz Univeristy of TechnologyW artykule przedstawiono analizę czynników wpływających
na moc tłokowego silnika spalinowego. Wyprowadzono zależność
pozwalającą wyrazić moc jednostkową silnika jako funkcję kilku
zmiennych (parametrów), które poddano szczegółowej analizie w kolejnych
podrozdziałach. Stwierdzono, iż wymierny wzrost mocy silnika o określonych wymiarach głównych można uzyskać głównie dzięki dwóm czynnikom: poprawie
sprawności napełnienia nv oraz wzrostowi gęstości powietrza na wlocie
do cylindrów. Szczególnie ten drugi sposób cechuje duża skuteczność, a
dodatkowo pozwala on na kształtowanie charakterystyk zewnętrznych
silnika w sposób korzystny z punktu widzenia sposobu jego użytkowania
(np. właściwości trakcyjnych napędzanego pojazdu).The paper presents an analysis of parameters impacting the
power of an IC engine. A relationship expressing the engine unit power as
a function of some variables (parameters) had been found and those
parameters had been thoroughly examined in successive subsections.
It was found that - for a fixed engine size - a substantial increase of the
engine power can be primarily attributed to two parameters: volumetric
efficiency and air density at the engine inlet. The second parameter is
particularly efficient in increasing the engine power and, additionally, it
allows enhancing the shape of the engine characteristics from the point of
view of its operating conditions (e.g. traction properties of a driven
vehicle.
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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