1,720,961 research outputs found
Memory requirement reduction of deep neural networks for field programmable gate arrays using low-bit quantization of parameters
No full textEffective employment of deep neural networks (DNNs) in mobile devices and embedded systems, like field programmable gate arrays, is hampered by requirements for memory and computational power. In this paper we propose a method that employs a non-uniform fixed-point quantization and a virtual bit shift (VBS) to improve the accuracy of the quantization of the DNN weights. We evaluate our method in a speech enhancement application, where a fully connected DNN is used to predict the clean speech spectrum from the input noisy speech spectrum. A DNN is optimized, its memory requirement is calculated, and its performance is evaluated using the short-time objective intelligibility (STOI) metric. The application of the low-bit quantization leads to a 50% reduction of the DNN memory requirement while the STOI performance drops only by 2.7%
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
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
Comparison of active energy-balance architectures for second-life battery dynamic equalization
No full textThe repurposing of exhausted automotive batteries in second-life stationary applications helps to overcome the ethical concerns related to Lithium-Ion battery disposal. However, the aged cells composing second-life batteries present large capacity variability that limits the battery usable energy. The usable energy can be increased using an active balancing architecture implementing dynamic equalization that moves charge from stronger cells to weaker ones during the normal battery operation. However, the high quantity of transferred charge makes the choice of the balancing architecture challenging. This work compares the Direct-Cell-to-Cell, Adjacent-Cell-to-Cell, Cell-to-Pack, and Pack-to-Cell active balancing architectures in different realistic scenarios. Three case studies are analyzed considering Gaussian, Weibull, and bimodal capacity distributions. For each distribution, a Monte Carlo simulation of 10,000 battery modules composed of 10 series-connected cells is carried out. The usable capacity obtained by applying dynamic equalization to each investigated architecture is calculated. The Direct-Cell-to-Cell architecture shows the best performance. However, the large performance gap among the architectures usually found in the literature appears to reduce when realistic scenarios are considered. Therefore, both Adjacent-Cell-to-Cell and Pack-to-Cells architectures emerge as good trade-offs between performance and complexity for dynamic equalization of second-life batteries
Inductive Low-cost System to Measure the Volume Variation of Prismatic Lithium-ion Cells
No full textBattery use is continuously on the rise for several applications as proven by the rapid growth of electric vehicles market. The development of more accurate battery control and estimation algorithms is an essential requirement to enhance battery performance. Sensor fusion techniques promise to improve control and estimation algorithms by combining the currently used electric and thermal measured data with physical and chemical ones. In particular, the cell volume variation appears to be connected to both State of Charge and State of Health. In this work, an inductive sensor, based on eddy currents, is used to develop a low-cost system to measure the volume variation of prismatic lithium-ion cells. The developed system consists of a cell holder structure, similar to the one used in commercial batteries, equipped with eddy current sensors. The system is applied to both fresh and aged cells. The obtained results prove that the proposed measurement system is able to track the cell expansions due to both the thermal and State of Charge variations. Furthermore, the volume variations found are comparable to literature experiments, in which expensive laboratory equipment is used
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