1,720,973 research outputs found
Adaptive neurofuzzy controller to regulate UTSG water level in nuclear power plants
Get PDFA data-driven adaptive neurofuzzy controller is presented for the water-level control of U-tube steam generators in nuclear power plants. This neurofuzzy controller is capable of learning the control action principles from the data obtained using other methods of automatic or manual control. There are four inputs in the neurofuzzy system, yet only eighty fuzzy rules involved. Therefore, the fuzzy system is versatile and moderately compact. The versatility is due to the higher input space dimension that helps to learn more control principles. The compactness is due to the number of rules being not too many. A 10-h evaluation trial of the trained fuzzy controller demonstrated its capability in regulating the water level under random disturbances and reference level changes
Implementation and control of generic Internet-Based telerobotic systems
No full textThis paper describes the design and implementation techniques of a generic Internet-based telerobotic system. The purpose is to make available the precious technical information and hands-on experience of the authors for the research community. The paper is based on the telerobotics system that the authors recently implemented between KAIST, Korea and Saga University, Japan. In its current functionality, two control modes: high-level supervisory control and low-level supervisory control are explored demonstrating their merits and demerits
Jerk controlled joint space trajectory planning methods using 5-3-5 spline trajectory for industrial robot manipulators
No full textIn robot manipulator trajectory planning, jerk controlled trajectories are desirable for
their amenability in path tracking, vibration suppression and reducing of
manipulator wear. Bounded and continuous jerk trajectories narrows the jerk profile
within known limits, eliminating discontinuities and spontaneous rising of jerk,
which are otherwise undesired. In this research, a new method for generating a
bounded and continuous jerk trajectory in joint space is implemented and tested.
Spline functions are a common method for interpolating a set of via points for
generating robot manipulator trajectories. The method introduced in this research is
a novel and robust spline interpolation algorithm, interpolating a 5thorder, 3rdorder
and 5thorder piecewise polynomial (5-3-5 spline), which can generate point-to-point
trajectories as well as trajectories with via points. Generated trajectory has
continuously differentiable profiles for position, velocity and acceleration and has a
start and end zero-bounded, continuous jerk profile. The algorithm allows the user to
independently define the position, velocity, acceleration and jerk values at both start
and end points. At via points, the continuity up to 5th time derivative is maintained,
and the user can define via point position and velocity. Also it allows the user to
define interpolation time intervals between every polynomial segment. Along with
the bounded and continuous jerk profile, these adjustable parameters in the 5-3-5
spline algorithm results an effective and robust trajectory generating method.
Trajectories generated using the 5-3-5 spline algorithm was simulated and tested
successfully on DENSO VP6 robot arm. The experiments demonstrated and proved
the robustness and applicability of the new trajectory generating method in both
point-to-point and via point motion
Renewable energy lamp as an alternative to kerosene lamp used in rural house holds
No full textAccording to UN Foundation there were 600 million people without access to grid power in 2014. As a result quality of living is in very low level among those people. There for they can’t compete with other communities to improve their social and economic level.
New renewable energy lamp was built for benefit of these under developed communities. This lamp was a miniature construction of an energy grid. This lamp can be energized with Solar, Wind or Hydro energy. This is affordable even for rural people.
The lamp has a 1W LED powered by 2-cell, 300mAh lead acid battery. Suns’ energy is harvested by 5W solar panel. This lamp can light a medium size room for 4 hours. This paper was published in ieeeXplore digital library in December, 2014
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
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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