1,720,955 research outputs found
Implementation of fuel film compensation algorithm on the Lamborghini diablo 6.0 engine
No full textThis paper presents the experimental work and the results obtained from the implementation of a transient fuel compensation algorithm for the 6.0-liter V12 high-performance engine that equips the Lamborghini Diablo vehicles. This activity has been carried out as part of an effort aimed at the optimization of the entire fuel injection control system. In the first part of the paper the tests for fuel film compensator identification are presented and discussed. In this phase the experimental work has been conducted in the test cell. An automatic calibration algorithm was developed to identify the well-known fuel film model X and τ parameters, so as to define their maps as a function of engine speed and intake manifold pressure. The influence of engine coolant temperature has been investigated separately; it will be soon presented together with the air dynamics compensation algorithm. In the second part of the paper, the performance of the fuel dynamics compensation algorithm is analyzed. The measured Air-Fuel Ratio (AFR) distribution, especially during selected portions of the USA driving cycle, has been chosen as a yardstick to evaluate the performance improvement of the new injection control strategy. The experimental tests have been conducted using Lamborghini's chassis dynamometer laboratory. The comparison between the AFR values, measured before and after the introduction of the new strategy using a linear oxygen sensor, clearly shows the efficiency gain in terms of AFR control due to the transient fuel compensation algorithm. Copyright © 2001 Society of Automotive Engineers, Inc
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
Model-based idle speed control for a high performance engine
No full textA study, for future applications, of a model-based Idle Speed Control (ISC) system for the L535 Lamborghini 6.2L-48 valve V12 gasoline engine is presented in this paper. Main features of the controller are: Real-time auto-adaptation; Synchronization of Throttle Angle (TA) opening with Spark Advance (SA) timing, through model-based Drive-by-Wire (DBW) control strategies; Auto-adaptive management of the absolute pressure levels in the two, completely separated, intake manifolds; Feed-forward compensation for known loads; Integrated Air-to-Fuel Ratio (AFR) control at idle. Design targets are: Idle speed error from the nominal value imperceptible by the driver, considering that this study is for a high performance engine; Emissions reduction; Minimization of the engine speed undershoot (overshoot) when applying (removing) unknown loads. The controller has been designed by first considering the issues associated with a Lamborghini engine running at idle (comfort in the driver's cabin, exhaust emissions, engine sound, fuel consumption) and by subsequently determining the parameters to meet the design targets. Secondly, a non linear model of the engine-vehicle system has been developed in Matlab-Simulink environment, based on experimental data acquired during both engine bench and on-board tests. Then, the ISC unknown parameters identification was carried out, and finally the controller was implemented in an experimental Electronic Control Unit (ECU) module, and tested in a prototype vehicle. Copyright © 2003 SAE International
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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